JP2008078797A - Magnetostatic oscillator - Google Patents
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 119
- 230000010355 oscillation Effects 0.000 claims abstract description 87
- 230000010356 wave oscillation Effects 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 16
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZPDRQAVGXHVGTB-UHFFFAOYSA-N gallium;gadolinium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Gd+3] ZPDRQAVGXHVGTB-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 239000013078 crystal Substances 0.000 description 1
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- 230000005347 demagnetization Effects 0.000 description 1
- 230000005293 ferrimagnetic effect Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
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- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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Abstract
【課題】静磁波素子が出力する発振信号の発振周波数が高いときでも小型化することのできる静磁波発振装置を提供することを目的とする。
【解決手段】静磁波素子に印加する磁界の強さを変えることで発振信号の周波数を調整する１つ以上の電磁コイルを、永久磁石の外側で且つ筐体の内部に配置することにより、永久磁石の幅寸法を電磁コイルの幅寸法より小さくすると共に、発振周波数が高いことで永久磁石が大きくなることで永久磁石の高さ寸法が大きくなっても、永久磁石が固定される筐体上面部材の凹部の深さ寸法を永久磁石の高さ寸法に合わせて大きくすることにより、静磁波発振装置の小型化を実現する。
【選択図】図１An object of the present invention is to provide a magnetostatic wave oscillation device that can be miniaturized even when the oscillation frequency of an oscillation signal output from a magnetostatic wave element is high.
One or more electromagnetic coils that adjust the frequency of an oscillation signal by changing the strength of a magnetic field applied to a magnetostatic wave element are arranged outside the permanent magnet and inside the housing. The upper surface member of the casing to which the permanent magnet is fixed even if the height dimension of the permanent magnet is increased by making the width dimension of the magnet smaller than the width dimension of the electromagnetic coil and increasing the permanent magnet due to the high oscillation frequency. The magnetostatic wave oscillator can be miniaturized by increasing the depth dimension of the recess in accordance with the height dimension of the permanent magnet.
[Selection] Figure 1
Description
本発明は、静磁波素子を用いた静磁波発振装置に係り、更に詳しくは、静磁波発振装置の小型化、接地性及び耐振動性の向上、発振周波数の調整に関するものである。 The present invention relates to a magnetostatic wave oscillating device using a magnetostatic wave element, and more particularly to downsizing of a magnetostatic wave oscillating device, improvement in grounding and vibration resistance, and adjustment of an oscillation frequency.
静磁波発振装置に使用される静磁波素子には、ＧＧＧ（ガドリニウム・ガリウム・ガーネット）非磁性単結晶基板上に、フェリ磁性体であるＹＩＧ（イットリウム・鉄・ガーネット）薄膜を液相エピタキシャル成長させた素子が一般的に用いられる。この静磁波素子は強い磁界を印加し磁気スピンを共鳴させることにより共振子として動作する。この静磁波素子の動作により、静磁波素子に強い磁界を印加すると、発振信号（マイクロ波帯の信号）を出力する。このときの共振周波数（発振信号の周波数）は印加する磁界の強さを変えることで、マイクロ波帯の周波数で２〜３オクターブの広帯域にわたり可変することができる。なお、周波数が１オクターブ高くなるとは、周波数が２倍になることで、周波数が１オクターブ低くなることとは、周波数が１／２になることにより、２〜３オクターブの広帯域とは、帯域幅（最小周波数から最大周波数までの周波数範囲）が、最小周波数から最小周波数の２〜３倍の周波数までのことである。 For magnetostatic wave elements used in magnetostatic wave oscillators, ferrimagnetic YIG (yttrium, iron, garnet) thin films are grown on a GGG (gadolinium gallium garnet) non-magnetic single crystal substrate by liquid phase epitaxial growth. Devices are generally used. This magnetostatic wave element operates as a resonator by applying a strong magnetic field to resonate magnetic spins. When a strong magnetic field is applied to the magnetostatic wave element by the operation of the magnetostatic wave element, an oscillation signal (a signal in the microwave band) is output. The resonance frequency (frequency of the oscillation signal) at this time can be varied over a wide band of 2 to 3 octaves at a frequency in the microwave band by changing the strength of the applied magnetic field. Note that when the frequency is increased by one octave, the frequency is doubled, and when the frequency is decreased by one octave, when the frequency is halved, the wide band of 2 to 3 octaves is the bandwidth. (Frequency range from the minimum frequency to the maximum frequency) is from the minimum frequency to a frequency two to three times the minimum frequency.
従来の静磁波発振装置について、図６を用いて説明する。図６は、従来の一例である静磁波発振装置の構造を示す断面図である。この構造の静磁波発振装置では、発振回路基板１２に実装された静磁波素子１に磁界１０（図中では模式的に複数の点線で示す。）を印加すると、前述の通り、静磁波素子１は発振信号を出力する。磁界１０は、永久磁石２により発生されるが、この磁界が外部に漏れることがないように、強磁性体材料であるフタ３、外部ヨーク４、底板５により、密閉構造となっている。密閉構造であるだけでなく、永久磁石２の一方の極（Ｎ極またはＳ極）に上部磁極７が取り付けられ、永久磁石２の他方の極（一方の極がＮ極の場合、Ｓ極。逆に、一方の極がＳ極の場合、Ｎ極。）にフタ３が取り付けられ、底板５には下部磁極６が、下部磁極６には銅板１３が、銅板１３には発振回路基板１２が取り付けられている。更に、電磁コイル８が底板５に、ＦＭコイル９が上部磁極７に固定されている。電磁コイル８、ＦＭコイル９については、後で詳述する。 A conventional magnetostatic wave oscillator will be described with reference to FIG. FIG. 6 is a cross-sectional view showing the structure of a magnetostatic wave oscillating device as an example of the prior art. In the magnetostatic wave oscillating device having this structure, when a magnetic field 10 (schematically shown by a plurality of dotted lines in the drawing) is applied to the magnetostatic wave element 1 mounted on the oscillation circuit substrate 12, as described above, the magnetostatic wave element 1 Outputs an oscillation signal. The magnetic field 10 is generated by the permanent magnet 2, but has a sealed structure with a lid 3, an external yoke 4 and a bottom plate 5, which are ferromagnetic materials, so that the magnetic field does not leak to the outside. In addition to the sealed structure, the upper magnetic pole 7 is attached to one pole (N pole or S pole) of the permanent magnet 2, and the other pole of the permanent magnet 2 (S pole when one pole is N pole). On the contrary, when one of the poles is an S pole, the N pole is attached), the bottom plate 5 is attached with the lower magnetic pole 6, the lower magnetic pole 6 with the copper plate 13, and the copper plate 13 with the oscillation circuit substrate 12. It is attached. Further, the electromagnetic coil 8 is fixed to the bottom plate 5 and the FM coil 9 is fixed to the upper magnetic pole 7. The electromagnetic coil 8 and the FM coil 9 will be described in detail later.
この構造により、永久磁石２で発生した磁界１０は、外部に漏れることがないと共に、上部磁極７と下部磁極６との間の空隙１１（矢印が示す間隔）に磁界１０を集中させることができる。そして、上部磁極７と下部磁極６の中心は、磁界１０が均一で磁束密度が最大であるため、図６の中心線上に静磁波素子１を配置することにより安定した発振周波数の発振信号が得られる。 With this structure, the magnetic field 10 generated by the permanent magnet 2 does not leak to the outside, and the magnetic field 10 can be concentrated in the gap 11 (interval indicated by the arrow) between the upper magnetic pole 7 and the lower magnetic pole 6. . Since the magnetic field 10 is uniform and the magnetic flux density is maximum at the center of the upper magnetic pole 7 and the lower magnetic pole 6, an oscillation signal having a stable oscillation frequency can be obtained by arranging the magnetostatic wave element 1 on the center line in FIG. It is done.
静磁波素子１より出力される発振信号の発振周波数は、静磁波素子１に印加される磁界の強さに依存する。この磁界の強さは、電磁コイル８及びＦＭコイル９の各コイルに流れる電流の大きさ（電流値）を調整することにより、例えば比帯域（周波数可変幅／中心周波数）で約２０％程度変化させることが可能である。即ち、中心周波数をｆ０とすると、０．９×ｆ０〜１．１×ｆ０の幅で周波数を変えることができる。 The oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 depends on the strength of the magnetic field applied to the magnetostatic wave element 1. The strength of the magnetic field changes by about 20% in the ratio band (frequency variable width / center frequency), for example, by adjusting the magnitude (current value) of the current flowing in each of the electromagnetic coil 8 and the FM coil 9. It is possible to make it. That is, assuming that the center frequency is f0, the frequency can be changed within a range of 0.9 × f0 to 1.1 × f0.
また、電磁コイル８及びＦＭコイル９に電流が流れていないとき、上部磁極７及び下部磁極６の間に印加される磁界１０の強さは、永久磁石２の磁力の強さ及び空隙１１の大きさに依存する。 Further, when no current flows through the electromagnetic coil 8 and the FM coil 9, the strength of the magnetic field 10 applied between the upper magnetic pole 7 and the lower magnetic pole 6 is the strength of the magnetic force of the permanent magnet 2 and the size of the gap 11. Depends on the size.
なお、前述の従来の静磁波発振装置の様に、静磁波素子に磁界を加えることにより発振信号を出力する静磁波発振装置に関する特許文献として、特許文献１（特開２００５−９４２０８号公報）がある。
前述の従来の静磁波発振装置では、高い発振周波数を所望する場合、強い磁界が必要となる。電磁コイル及びＦＭコイルに流れる電流の大きさ（電流値）を調整することにより発振周波数を調整することができるものの、調整できる発振周波数の範囲は限られている。そこで、電磁コイル及びＦＭコイルで調整できる範囲外の発振周波数に設定する場合、電磁コイル及びＦＭコイルに電流を流すのをやめて、上部磁極及び下部磁極の間に印加する磁界の強さを変える必要がある。前述の通り、電磁コイル及びＦＭコイルに電流が流れていないときの上部磁極及び下部磁極の間に印加する磁界の強さは、永久磁石の磁力の強さ及び空隙の大きさに依存するため、永久磁石の磁力を強くするか、空隙を小さくすることにより、磁界の強さを変えることができる。 In the conventional magnetostatic wave oscillator described above, a strong magnetic field is required when a high oscillation frequency is desired. Although the oscillation frequency can be adjusted by adjusting the magnitude (current value) of the current flowing through the electromagnetic coil and the FM coil, the range of the oscillation frequency that can be adjusted is limited. Therefore, when setting the oscillation frequency outside the range that can be adjusted by the electromagnetic coil and the FM coil, it is necessary to stop the current from flowing through the electromagnetic coil and the FM coil and change the strength of the magnetic field applied between the upper magnetic pole and the lower magnetic pole. There is. As described above, the strength of the magnetic field applied between the upper magnetic pole and the lower magnetic pole when no current flows through the electromagnetic coil and the FM coil depends on the strength of the magnetic force of the permanent magnet and the size of the air gap. The intensity of the magnetic field can be changed by increasing the magnetic force of the permanent magnet or reducing the gap.
永久磁石の磁力を強くするには、外部から強力な磁力を永久磁石に加えればよいものの、永久磁石に加えることができる最大の磁力の強さは、永久磁石の材質、厚み、面積等で決まり、通常、強い磁界が得られる材質（例えば、鉄を主成分とする鉄、アルミニウム、ニッケル、コバルトの合金）の永久磁石を用いるため、永久磁石に加えることができる最大の磁力を強くするには、永久磁石の厚さ、面積を大きくする、即ち、永久磁石を大きくする必要がある。その結果、永久磁石を大きくすることで永久磁石の磁力を強くすることとなるために、高い発振周波数を所望すると、静磁波発振装置の小型化が困難になるという欠点がある。また、空隙を小さくしようにも、従来の静磁波発振装置では空隙を変えることができない構造であることにより、空隙を小さくすることで磁界の強さを大きくすることで、高い発振周波数を得るように調整することは不可能であるという欠点がある。 To increase the magnetic force of the permanent magnet, a strong magnetic force should be applied to the permanent magnet from the outside, but the maximum magnetic force that can be applied to the permanent magnet is determined by the material, thickness, area, etc. of the permanent magnet. In order to increase the maximum magnetic force that can be applied to a permanent magnet, a permanent magnet is usually used that is made of a material that can provide a strong magnetic field (for example, an iron, aluminum, nickel, or cobalt alloy containing iron as a main component). It is necessary to increase the thickness and area of the permanent magnet, that is, to increase the permanent magnet. As a result, since the magnetic force of the permanent magnet is increased by increasing the size of the permanent magnet, there is a drawback that it is difficult to reduce the size of the magnetostatic wave oscillation device when a high oscillation frequency is desired. In addition, even if the gap is made small, the conventional magnetostatic wave oscillator cannot change the gap, so that a high oscillation frequency can be obtained by increasing the magnetic field strength by reducing the gap. However, there is a disadvantage that it is impossible to make adjustments.
更に、前述の従来の静磁波発振装置は、空隙に磁界を集中させるために、永久磁石に固定された上部磁極を空隙の上方に、底板に固定された下部磁極を空隙の下方に設ける構造としているが、この構造では発振回路基板を固定した銅板が薄く、その周辺に空間ができてしまうため、接地が十分とれない、外部からの振動に弱いという欠点がある。 Furthermore, the conventional magnetostatic wave oscillator described above has a structure in which an upper magnetic pole fixed to a permanent magnet is provided above the air gap and a lower magnetic pole fixed to the bottom plate is provided below the air gap to concentrate the magnetic field in the air gap. However, this structure has a drawback that the copper plate to which the oscillation circuit board is fixed is thin and a space is formed around the copper plate, so that grounding is not sufficient and it is vulnerable to external vibration.
そこで本発明では、前述の欠点を除去することにより、発振周波数が高いときでも小型化することのできる静磁波発振装置を提供すること、空隙を調整できることで広範囲に発振周波数を調整することができる静磁波発振装置を提供すること、更に、外部からの振動に強く接地性能を向上させた静磁波発振装置を提供することを目的とする。 Therefore, the present invention provides a magnetostatic wave oscillation device that can be reduced in size even when the oscillation frequency is high by eliminating the above-mentioned drawbacks, and can adjust the oscillation frequency over a wide range by adjusting the gap. It is an object of the present invention to provide a magnetostatic wave oscillation device and to provide a magnetostatic wave oscillation device that is strong against external vibration and has improved grounding performance.
本発明は、前述の目的を達成するために、静磁波素子と、該静磁波素子に磁界を印加する永久磁石とを、強磁性体材料から成る筐体の内部に内蔵し、前記永久磁石から印加された磁界で前記静磁波素子が発振信号を出力する静磁波発振装置において、前記静磁波素子に印加する磁界の強さを変えることで前記発振信号の周波数を調整する１つ以上の電磁コイルを、前記永久磁石の外側で且つ前記筐体の内部に配置し、該配置により前記永久磁石の幅寸法を前記電磁コイルの幅寸法より小さくすることで、小型化するように構成するようにしたものである。 In order to achieve the above-mentioned object, the present invention incorporates a magnetostatic wave element and a permanent magnet for applying a magnetic field to the magnetostatic wave element in a casing made of a ferromagnetic material, and One or more electromagnetic coils that adjust the frequency of the oscillation signal by changing the strength of the magnetic field applied to the magnetostatic wave element in the magnetostatic wave oscillation device in which the magnetostatic wave element outputs an oscillation signal with an applied magnetic field Is arranged outside the permanent magnet and inside the casing, and by the arrangement, the width dimension of the permanent magnet is made smaller than the width dimension of the electromagnetic coil, so that the size is reduced. Is.
また、強磁性体材料から成り、上面部材を含む筐体の内部に、静磁波素子と、該静磁波素子を実装する基板と、前記静磁波素子に磁界を印加する永久磁石とを内蔵すると共に、前記永久磁石を前記上面部材に固定し、前記永久磁石から印加された磁界で前記静磁波素子が発振信号を出力する静磁波発振装置において、前記静磁波素子の真下の位置に凸部を有する底面部材を前記筐体に設けると共に、前記凸部の外側に前記凸部と同じ厚さの銅板を設け、前記底面部材の凸部と前記銅板とに前記基板を固定することで、外部からの振動による基板の揺れを抑えられ、且つ、十分な接地が得られるように構成したものである。 In addition, a magnetostatic wave element, a substrate on which the magnetostatic wave element is mounted, and a permanent magnet that applies a magnetic field to the magnetostatic wave element are housed in a housing made of a ferromagnetic material and including the upper surface member. In the magnetostatic wave oscillating device in which the permanent magnet is fixed to the upper surface member, and the magnetostatic wave element outputs an oscillation signal with a magnetic field applied from the permanent magnet, the magnetostatic wave element has a convex portion at a position directly below the magnetostatic wave element. A bottom member is provided on the casing, a copper plate having the same thickness as the convex portion is provided outside the convex portion, and the substrate is fixed to the convex portion of the bottom member and the copper plate, so that an external It is configured so that the substrate can be prevented from shaking due to vibration and sufficient grounding can be obtained.
更に、強磁性体材料から成り、上面部材を含む筐体の内部に、静磁波素子と、該静磁波素子を実装した基板と、前記静磁波素子に磁界を印加する永久磁石とを内蔵し、該永久磁石から印加された磁界で前記静磁波素子が発振信号を出力する静磁波発振装置において、前記上面部材にネジ穴を設けると共に、前記ネジ穴に噛み合うネジ部を有し前記永久磁石が固定される磁石台座とを設け、該磁石台座を移動させることで変化する前記永久磁石と前記静磁波素子との距離に応じて前記磁界の強さを変化することで、前記磁石台座を移動させて前記静磁波素子が出力する発振信号の周波数を調整するように構成するようにしたものである。 In addition, a magnetostatic wave element, a substrate on which the magnetostatic wave element is mounted, and a permanent magnet that applies a magnetic field to the magnetostatic wave element are incorporated in a housing made of a ferromagnetic material and including the upper surface member. In the magnetostatic wave oscillating device in which the magnetostatic wave element outputs an oscillation signal with a magnetic field applied from the permanent magnet, the upper surface member is provided with a screw hole and has a screw portion that meshes with the screw hole, and the permanent magnet is fixed. A magnetic pedestal is provided, and the magnetic pedestal is moved by changing the strength of the magnetic field according to the distance between the permanent magnet and the magnetostatic wave element that is changed by moving the magnetic pedestal. In this configuration, the frequency of the oscillation signal output from the magnetostatic wave element is adjusted.
本発明によれば、電磁コイルを、永久磁石の外側で且つ筐体の外部に配置することで、永久磁石の幅寸法を電磁コイルの幅寸法より小さくなるように抑えることができるため、静磁波発振装置の小型化が可能である。また、静磁波素子を実装した基板が筐体の底面部材の凸部と銅板に固定されることにより、静磁波素子を実装した基板の厚さが薄くて基板の周囲に空間ができてしまう構造の従来の静磁波発振装置に比べて、接地が十分にとれると共に外部からの振動にも強くなる。更に、磁石台座を移動させることで変化する永久磁石と静磁波素子との距離に応じて磁界の強さが変化することにより、磁石台座を移動させて静磁波素子が出力する発振信号の周波数を広範囲に調整することができる。なお、前述の通り、磁石台座のネジ部は筐体の上面部材に設けたネジ穴と噛み合うことにより、ピッチ（ネジにおいて、互いに隣接する山（または谷）同士の間隔）の小さいネジを用いることにより、永久磁石と静磁波素子との距離を微細に調整することが可能となり、その結果、発振周波数の調整精度の向上が図れる。 According to the present invention, since the electromagnetic coil is arranged outside the permanent magnet and outside the housing, the width of the permanent magnet can be suppressed to be smaller than the width of the electromagnetic coil. The oscillation device can be reduced in size. In addition, the structure in which the substrate on which the magnetostatic wave element is mounted is fixed to the convex portion of the bottom member of the housing and the copper plate, so that the thickness of the substrate on which the magnetostatic wave element is mounted is thin and a space is created around the substrate Compared with the conventional magnetostatic wave oscillation device, the grounding can be sufficiently taken and the vibration from the outside is also strong. Furthermore, the frequency of the oscillation signal output from the magnetostatic wave element by moving the magnet pedestal is changed by changing the strength of the magnetic field according to the distance between the permanent magnet and the magnetostatic wave element that changes by moving the magnet pedestal. It can be adjusted over a wide range. In addition, as described above, the screw portion of the magnet pedestal is engaged with a screw hole provided in the upper surface member of the housing, so that a screw having a small pitch (a space between adjacent peaks (or valleys) in the screw) is used. As a result, the distance between the permanent magnet and the magnetostatic wave element can be finely adjusted, and as a result, the adjustment accuracy of the oscillation frequency can be improved.
以下、本発明の実施例である静磁波発振装置について、図１〜図５を用いて説明する。図１は、本発明の第一実施例である静磁波発振装置の構造を示す断面図である。図２は、本発明の第一実施例である静磁波発振装置へのドライバ回路基板の取付構造を示す断面図である。図３は、本発明の第一実施例である静磁波発振装置のシールドケースへの取付構造を示す断面図である。図４は本発明の第一実施例である静磁波発振装置のシールドケースへの取付構造を示す側面図である。図５は本発明の第二実施例である静磁波発振装置の構造を示す断面図である。 Hereinafter, a magnetostatic wave oscillation device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view showing the structure of a magnetostatic wave oscillating device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the structure for attaching the driver circuit board to the magnetostatic wave oscillating device according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a structure for attaching the magnetostatic wave oscillating device according to the first embodiment of the present invention to the shield case. FIG. 4 is a side view showing a structure for attaching the magnetostatic wave oscillating device according to the first embodiment of the present invention to the shield case. FIG. 5 is a sectional view showing the structure of a magnetostatic wave oscillating device according to the second embodiment of the present invention.
まず、本発明の第一実施例である静磁波発振装置の構造について、図１を用いて説明する。図１に示す第一実施例の静磁波発振装置では、発振回路基板１２に実装された静磁波素子１に磁界１０（図中では模式的に複数の点線で示す。）を印加すると、前述の通り、静磁波素子１は発振信号を出力する。磁界１０は、永久磁石２により発生されるが、この磁界が外部に漏れることがないように、強磁性材料であるフタ３、外部ヨーク４、底板５により、密閉構造となっている。密閉構造であるだけでなく、永久磁石２の一方の極（Ｎ極またはＳ極）に上部磁極７が固定され、永久磁石２の他方の極（一方の極がＮ極の場合、Ｓ極。逆に、一方の極がＳ極の場合、Ｎ極。）がフタ３の凹部に挿入されて固定される構造となっている。この構造により、永久磁石２の中心ずれを小さくでき、生産性を向上させることができる。更に、底板５には凸部を有し、この凸部の外側には凸部と同じ厚さの銅板１３が底板５に固定されており、底板５の凸部と銅板１３に静磁波素子１を実装した発振回路基板１２が固定されることにより、底板５の凸部は下部磁極６として動作する。底板５の凸部が下部磁極６として動作する以外にも、前述の通り、底板５に固定された下部磁極６及び銅板１３とに発振回路基板１２が固定されることにより、外部からの振動による発振回路基板１２の揺れを抑えることができると共に、十分な接地も可能である。その上、第一実施例の静磁波発振装置は、銅板１３を外部ヨーク４と底板５とに挟み込まれることで銅板１３を底板５に押し付ける構造であるため、銅板１３の底板５への固定が強固に行われることにより、外部からの振動に対して更に強くなると共に、接地性能も更に向上する。なお、銅板１３は、静磁波発振装置内に発生した磁界に影響を与えない性質を有することにより、発振回路基板１２を固定するのに用いている。 First, the structure of the magnetostatic wave oscillating device according to the first embodiment of the present invention will be described with reference to FIG. In the magnetostatic wave oscillating device of the first embodiment shown in FIG. 1, when a magnetic field 10 (schematically indicated by a plurality of dotted lines in the figure) is applied to the magnetostatic wave element 1 mounted on the oscillation circuit board 12, the above-mentioned As described above, the magnetostatic wave element 1 outputs an oscillation signal. The magnetic field 10 is generated by the permanent magnet 2, but has a sealed structure with a lid 3, an external yoke 4, and a bottom plate 5, which are ferromagnetic materials, so that the magnetic field does not leak to the outside. In addition to the sealed structure, the upper magnetic pole 7 is fixed to one pole (N pole or S pole) of the permanent magnet 2, and the other pole of the permanent magnet 2 (S pole when one pole is N pole). On the contrary, when one pole is the S pole, the N pole is inserted into the recess of the lid 3 and fixed. With this structure, the center deviation of the permanent magnet 2 can be reduced, and the productivity can be improved. Further, the bottom plate 5 has a convex portion, and a copper plate 13 having the same thickness as the convex portion is fixed to the bottom plate 5 outside the convex portion, and the magnetostatic wave element 1 is attached to the convex portion of the bottom plate 5 and the copper plate 13. Is fixed, the convex portion of the bottom plate 5 operates as the lower magnetic pole 6. In addition to the convex portion of the bottom plate 5 operating as the lower magnetic pole 6, as described above, the oscillation circuit substrate 12 is fixed to the lower magnetic pole 6 and the copper plate 13 fixed to the bottom plate 5. The vibration of the oscillation circuit board 12 can be suppressed and sufficient grounding is possible. In addition, since the magnetostatic wave oscillating device of the first embodiment has a structure in which the copper plate 13 is pressed against the bottom plate 5 by sandwiching the copper plate 13 between the external yoke 4 and the bottom plate 5, the copper plate 13 can be fixed to the bottom plate 5. By being carried out firmly, it becomes stronger against vibrations from the outside, and the grounding performance is further improved. The copper plate 13 has a property that does not affect the magnetic field generated in the magnetostatic wave oscillating device, and is used to fix the oscillation circuit board 12.
外部からの振動に対して強く、且つ、十分な接地が取れる以外にも、第一実施例の静磁波発振装置では、永久磁石２で発生した磁界１０が外部に漏れることがないと共に、上部磁極７と下部磁極６との間の空隙１１（矢印が示す間隔）に磁界１０を集中させることができ、上部磁極７と下部磁極６の中心において、磁界１０が均一で磁束密度が最大であるため、中心線上に静磁波素子１を配置することにより安定した発振周波数の発振信号が得られる。 In addition to being strong against external vibration and sufficient grounding, the magnetostatic wave oscillating device of the first embodiment does not leak the magnetic field 10 generated by the permanent magnet 2 to the outside. 7 and the lower magnetic pole 6, the magnetic field 10 can be concentrated in the gap 11 (interval indicated by the arrow), and the magnetic field 10 is uniform and the magnetic flux density is maximum at the center of the upper magnetic pole 7 and the lower magnetic pole 6. By arranging the magnetostatic wave element 1 on the center line, an oscillation signal having a stable oscillation frequency can be obtained.
この発振信号の発振周波数は、前述の通り、静磁波素子１に印加される磁界の強さに依存し、この静磁波素子１に印加される磁界の強さは、永久磁石２の磁力の強さと、電磁コイル８及びＦＭコイル９の磁力の強さとによって決まる。そして、永久磁石２の磁力の強さは一定であるのに対して、電磁コイル８及びＦＭコイル９は、前述の通り、両方ともコイルを流れる電流の大きさ（電流値）に応じて磁力の強さが変わるため、電磁コイル８及びＦＭコイル９の各コイルを流れる電流の大きさ（電流値）を変えることにより、静磁波素子１に印加される磁界の強さが変わることで、静磁波素子１出力の発振信号の発振周波数が変化する。その結果、電磁コイル８及びＦＭコイル９の各コイルを流れる電流の大きさ（電流値）を変えることにより、静磁波素子１出力の発振信号の発振周波数を調整する。なお、電磁コイル８は粗調整用電磁コイルであり、ＦＭコイル９は微調整用コイルであることにより、静磁波素子１出力の発振信号の発振周波数の調整を行う際、まず、電磁コイル８のコイルを流れる電流の大きさ（電流値）を変えることで粗調整を行い、次に、ＦＭコイル９のコイルを流れる電流の大きさ（電流値）を変えることで微調整を行う。 As described above, the oscillation frequency of this oscillation signal depends on the strength of the magnetic field applied to the magnetostatic wave element 1, and the strength of the magnetic field applied to the magnetostatic wave element 1 is the strength of the magnetic force of the permanent magnet 2. And the strength of the magnetic force of the electromagnetic coil 8 and the FM coil 9. And while the strength of the magnetic force of the permanent magnet 2 is constant, the electromagnetic coil 8 and the FM coil 9 both have a magnetic force according to the magnitude (current value) of the current flowing through the coil as described above. Since the strength changes, the strength of the magnetic field applied to the magnetostatic wave element 1 changes by changing the magnitude (current value) of the current flowing through each of the electromagnetic coil 8 and the FM coil 9. The oscillation frequency of the oscillation signal output from the element 1 changes. As a result, the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 is adjusted by changing the magnitude (current value) of the current flowing through each of the electromagnetic coil 8 and the FM coil 9. Since the electromagnetic coil 8 is a coarse adjustment electromagnetic coil and the FM coil 9 is a fine adjustment coil, when adjusting the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1, first, the electromagnetic coil 8 Coarse adjustment is performed by changing the magnitude (current value) of the current flowing through the coil, and then fine adjustment is performed by changing the magnitude (current value) of the current flowing through the coil of the FM coil 9.
前述の発振周波数の調整に用いる電磁コイル８及びＦＭコイル９は両方とも空芯コイルであること、永久磁石２は円柱形状を有していることにより、図１の通り、永久磁石２の外側に、電磁コイル８及びＦＭコイル９を配置する構造とすることが可能であるが、この構造とすることにより、永久磁石２の直径を両電磁コイルの内、小さい方の電磁コイル（図１では、ＦＭコイル９）の内径寸法未満に抑えることができるため、永久磁石２を小型化し、その結果、静磁波発振装置を小型化することができる。なお、静磁波素子１出力の発振信号の発振周波数が高いことで、前述の通り、永久磁石２を大きくしなければならない場合でも、永久磁石２の高さ寸法を大きくすると共に、永久磁石２の高さ寸法に応じてフタ３の凹部の深さ寸法を変えることにより、即ち、永久磁石２の高さ寸法が大きいとき、ふた３の凹部の深さ寸法を大きくすることにより、静磁波発振装置を小型化することができる。また、前述の通り、永久磁石２の直径が小さく抑えることができるため、即ち、磁石の断面積Ａｍを小さく抑えることができるため、下記（２）式の通り、パーミアンス係数Ｐｃを大きくすることができる。なお、パーミアンス係数Ｐｃとは、下記（１）式の通り、磁石にかかる反磁界の強さＨｄと磁石中の磁束密度Ｂｄとの比であり、パーミアンス係数Ｐｃが大きいと、永久磁石２の熱減磁を小さく押さえる効果がある。即ち、温度変化により、永久磁石２が空隙１１に作る磁束量が小さくなるのを抑えることができるという効果がある。 The electromagnetic coil 8 and the FM coil 9 used for adjusting the oscillation frequency described above are both air-core coils, and the permanent magnet 2 has a cylindrical shape. The electromagnetic coil 8 and the FM coil 9 can be arranged. However, by adopting this structure, the diameter of the permanent magnet 2 is smaller than both of the electromagnetic coils (in FIG. 1, Since the inner diameter dimension of the FM coil 9) can be suppressed, the permanent magnet 2 can be downsized, and as a result, the magnetostatic wave oscillation device can be downsized. Note that, since the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 is high, as described above, the height of the permanent magnet 2 is increased and the height of the permanent magnet 2 is increased even when the permanent magnet 2 must be enlarged. By changing the depth dimension of the recess of the lid 3 according to the height dimension, that is, when the height dimension of the permanent magnet 2 is large, by increasing the depth dimension of the recess of the lid 3, the magnetostatic wave oscillation device Can be miniaturized. Further, as described above, since the diameter of the permanent magnet 2 can be kept small, that is, the sectional area Am of the magnet can be kept small, the permeance coefficient Pc can be increased as shown in the following equation (2). it can. The permeance coefficient Pc is a ratio of the demagnetizing field strength Hd applied to the magnet and the magnetic flux density Bd in the magnet as shown in the following formula (1). If the permeance coefficient Pc is large, the heat of the permanent magnet 2 This has the effect of reducing demagnetization. That is, there is an effect that it is possible to suppress a decrease in the amount of magnetic flux created by the permanent magnet 2 in the air gap 11 due to a temperature change.
Ｐｃ＝Ｂｄ／（μ０×Ｈｄ）………（１）
Ｐｃ：パーミアンス係数
Ｂｄ：磁石中の磁束密度（Ｔ）
μ０：真空の透磁率（Ｈ／ｍ） μ０＝４π×１０−７（Ｈ／ｍ）
Ｈｄ：磁石にかかる反磁界の強さ（Ａ／ｍ）
Ｐｃ＝（Ｆ×Ａｇ×Ｌｍ）／（ｒ×Ａｍ×Ｌｇ）………（２）
Ｐｃ：パーミアンス係数
Ｆ：漏れ係数
Ａｇ：空隙の断面積（ｍ２）
Ｌｍ：磁石の長さ（ｍ）
ｒ：磁気損失係数
Ａｍ：磁石の断面積（ｍ２）
Ｌｇ：空隙の長さ（ｍ）
更に、第一実施例の静磁波発振装置は、静磁波素子１から発振信号が出力されることにより、発振回路基板１２には静磁波素子１等の電気部品により構成された発振回路が形成される。この発振回路への電源の供給のためのケーブルとして、通常のケーブルを用いても良いが、電源線と接地線とを有する同軸ケーブル１４を使用することにより、電源線用のケーブルと接地線用のケーブルを使用する必要がなくなるため、静磁波発振装置を更に小型化することができる。
Pc = Bd / (μ0 × Hd) (1)
Pc: Permeance coefficient Bd: Magnetic flux density in magnet (T)
μ0: Permeability of vacuum (H / m) μ0 = 4π × 10 −7 (H / m)
Hd: Demagnetizing field strength applied to the magnet (A / m)
Pc = (F × Ag × Lm) / (r × Am × Lg) (2)
Pc: Permeance coefficient F: Leakage coefficient Ag: Cross-sectional area of air gap (m 2 )
Lm: Magnet length (m)
r: Magnetic loss coefficient Am: Cross-sectional area of magnet (m 2 )
Lg: length of gap (m)
Furthermore, in the magnetostatic wave oscillating device of the first embodiment, an oscillation circuit composed of electrical components such as the magnetostatic wave element 1 is formed on the oscillation circuit substrate 12 by outputting an oscillation signal from the magnetostatic wave element 1. The As a cable for supplying power to the oscillation circuit, a normal cable may be used. However, by using a coaxial cable 14 having a power line and a ground line, the power line cable and the ground line are used. Therefore, the magnetostatic wave oscillation device can be further downsized.
以上の通り、第一実施例の静磁波発振装置では、各コイル（電磁コイル８、ＦＭコイル９）を永久磁石２の外側に配置すること、発振回路基板１２に形成された発振回路へ同軸ケーブル１４を用いて電源供給を行うことにより、小型化することができる。更に、底板５に固定された下部磁極６及び銅板１３に発振回路基板１２が固定されること、銅板１３を外部ヨーク４と底板５とに挟み込まれることで銅板１３が底板５に押し付けられることにより、耐振動性及び接地性能が向上する。 As described above, in the magnetostatic wave oscillating device according to the first embodiment, the coils (the electromagnetic coil 8 and the FM coil 9) are arranged outside the permanent magnet 2, and the coaxial cable is connected to the oscillation circuit formed on the oscillation circuit board 12. By using 14 to supply power, the size can be reduced. Further, the oscillation circuit substrate 12 is fixed to the lower magnetic pole 6 and the copper plate 13 fixed to the bottom plate 5, and the copper plate 13 is pressed against the bottom plate 5 by sandwiching the copper plate 13 between the external yoke 4 and the bottom plate 5. Improves vibration resistance and grounding performance.
なお、第一実施例の静磁波発振装置では、空隙１１に磁界１０をより集中させるために上部磁極７及び下部磁極６を配置し、上部磁極７と下部磁極６の間の空隙１１の中心に静磁波素子１を配置する構造となっているが、所望の磁界が得られる場合には、上部磁極７及び下部磁極６の一方もしくは両方を配置しないことも可能である。なお、下部磁極６を配置しない場合には、底板５に固定された銅板に発振回路基板１２を固定する構造とする。 In the magnetostatic wave oscillating device of the first embodiment, the upper magnetic pole 7 and the lower magnetic pole 6 are disposed in order to concentrate the magnetic field 10 in the air gap 11, and the air gap 11 is located at the center of the air gap 11 between the upper magnetic pole 7 and the lower magnetic pole 6. Although the magnetostatic wave element 1 is arranged, it is possible to dispose one or both of the upper magnetic pole 7 and the lower magnetic pole 6 when a desired magnetic field is obtained. When the lower magnetic pole 6 is not disposed, the oscillation circuit substrate 12 is fixed to a copper plate fixed to the bottom plate 5.
第一実施例の静磁波発振装置は、前述の通り、各コイル（電磁コイル８、ＦＭコイル９）に流れる電流の大きさ（電流値）を変えることにより、静磁波素子１出力の発振信号の発振周波数を変えるようにしているが、各コイル（電磁コイル８、ＦＭコイル９）に流れる電流の大きさ（電流値）は、ドライバ回路基板により調整される。即ち、ドライバ回路基板で調整された電流値で、各コイル（電磁コイル８、ＦＭコイル９）に電流が流れることにより、静磁波素子１出力の発振信号の発振周波数は、ドライバ回路基板で各コイル（電磁コイル８、ＦＭコイル９）の電流値を変えることにより、調整される。ドライバ回路基板は、以下の通り、第一実施例の静磁波発振装置に取付可能な構造であることにより、各コイル（電磁コイル８、ＦＭコイル９）の電流値を変えるための外部装置を第一実施例の静磁波発振装置を接続することなく、静磁波素子１出力の発振信号の発振周波数を調整することが可能となる。 As described above, the magnetostatic wave oscillating device of the first embodiment changes the magnitude (current value) of the current flowing through each coil (the electromagnetic coil 8 and the FM coil 9), thereby generating the oscillation signal of the magnetostatic wave element 1 output. Although the oscillation frequency is changed, the magnitude (current value) of the current flowing through each coil (the electromagnetic coil 8 and the FM coil 9) is adjusted by the driver circuit board. That is, the current flows through each coil (the electromagnetic coil 8 and the FM coil 9) with the current value adjusted by the driver circuit board, so that the oscillation frequency of the oscillating signal output from the magnetostatic wave element 1 is changed to each coil by the driver circuit board. Adjustment is made by changing the current values of the electromagnetic coil 8 and the FM coil 9. The driver circuit board has a structure that can be attached to the magnetostatic wave oscillating device of the first embodiment as described below, so that an external device for changing the current value of each coil (the electromagnetic coil 8 and the FM coil 9) can be used. It is possible to adjust the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 without connecting the magnetostatic wave oscillator of one embodiment.
以下、第一実施例の静磁波発振装置へのドライバ回路基板の取付構造について、図２を用いて説明する。ドライバ回路基板１９は、スペーサ２０を挟んでネジ２１で第一実施例の静磁波発振装置に固定される。なお、スペーサ２０及びネジ２１は、磁界が第一実施例の静磁波発振装置から漏れることがないようにするために、磁性体でないことが望ましい。そして、スペーサ２０及びネジ２１で固定されたドライバ回路基板１９と、第一実施例の静磁波発振装置の電磁コイル８、ＦＭコイル９とは、それぞれ、電磁コイル引き出し線２２、ＦＭコイル引き出し線２３で接続され、電源線と接地線とを有する同軸ケーブル１４が発振回路基板１２に接続される。図２では、ＦＭコイル引き出し線２３が電磁コイル８の外周を回るように配線しているが、電磁コイル８の下側を通して配線するようにしても良い。前述の通り、発振回路基板１２には、同軸ケーブル１４で電源が供給されるのに対し、ドライバ回路基板１９には、コネクタ等（図示せず）を介して電源が供給される。ドライバ回路基板１９への制御信号の入出力も、コネクタ等（図示せず）を介して行われる。 Hereinafter, the mounting structure of the driver circuit board to the magnetostatic wave oscillator of the first embodiment will be described with reference to FIG. The driver circuit board 19 is fixed to the magnetostatic wave oscillating device of the first embodiment with a screw 21 with a spacer 20 in between. The spacer 20 and the screw 21 are preferably not magnetic materials so that the magnetic field does not leak from the magnetostatic wave oscillation device of the first embodiment. The driver circuit board 19 fixed by the spacer 20 and the screw 21 and the electromagnetic coil 8 and the FM coil 9 of the magnetostatic wave oscillation device of the first embodiment are respectively an electromagnetic coil lead wire 22 and an FM coil lead wire 23. And a coaxial cable 14 having a power line and a ground line is connected to the oscillation circuit board 12. In FIG. 2, the FM coil lead wire 23 is wired so as to go around the outer periphery of the electromagnetic coil 8, but may be routed through the lower side of the electromagnetic coil 8. As described above, power is supplied to the oscillation circuit board 12 through the coaxial cable 14, whereas power is supplied to the driver circuit board 19 via a connector or the like (not shown). Input / output of control signals to / from the driver circuit board 19 is also performed via a connector or the like (not shown).
以上の通り、第一実施例の静磁波発振装置にはドライバ回路基板１９が取り付けられるが、更に、ドライバ回路基板１９が取り付けられた状態で第一実施例の静磁波発振装置は、シールドケース２４にも取り付けられる。第一実施例の静磁波発振装置はシールドケース２４に取り付けられることにより、外部の磁界を遮蔽することができるため、静磁波素子１に、永久磁石２、電磁コイル８、ＦＭコイル９だけでなく、外部の磁界が印加することにより、第一実施例の静磁波発振装置が誤動作する（所望の発振周波数とは異なる周波数の発振信号を静磁波素子１が出力する）のを防ぐことができる。 As described above, the driver circuit board 19 is attached to the magnetostatic wave oscillating device of the first embodiment. Furthermore, the magnetostatic wave oscillating device of the first embodiment with the driver circuit board 19 attached is the shield case 24. Can also be attached. Since the magnetostatic wave oscillating device of the first embodiment can be shielded from an external magnetic field by being attached to the shield case 24, the magnetostatic wave element 1 includes not only the permanent magnet 2, the electromagnetic coil 8, and the FM coil 9. By applying an external magnetic field, it is possible to prevent the magnetostatic wave oscillator of the first embodiment from malfunctioning (the magnetostatic wave element 1 outputs an oscillation signal having a frequency different from the desired oscillation frequency).
以下、第一実施例の静磁波発振装置へのシールドケースへの取付構造について、図３、図４を用いて説明する。第一実施例の静磁波発振装置は、スペーサ２５を挟んでネジ２６でシールドケース２４に固定される。なお、スペーサ２５を挟んでネジでシールドケース２０に固定する以外にも、シールドケース２０と静磁波発振装置の隙間を全て衝撃吸収用弾性体等で補填して固定するようにしても良い。図３の通り、スペーサ２５を挟んでネジ２６でシールドケース２４に固定する場合、スペーサ２５及びネジ２６は、磁界が第一実施例の静磁波発振装置から漏れることがないようにするために、磁性体でないことが望ましい。そして、スペーサ２５には、金属もしくは衝撃吸収用弾性体等の材質を用いることにより、万一、シールドケース２４に衝撃が作用したことによる破損等の影響が、最小限となるようにしている。スペーサ２５に金属もしくは衝撃吸収用弾性体等の材質を用いる以外でも、第一実施例の静磁波発振装置の上部及び裏側、ドライバ回路基板１５の下部に、空間２９を設けることにより、シールドケース２４に衝撃が作用した場合、この衝撃が、第一実施例の静磁波発振装置に伝達させないようにしている。 Hereinafter, the attachment structure to the shield case to the magnetostatic wave oscillating device of the first embodiment will be described with reference to FIGS. The magnetostatic wave oscillating device of the first embodiment is fixed to the shield case 24 with screws 26 with a spacer 25 in between. In addition to fixing the spacer 25 to the shield case 20 with screws, the gap between the shield case 20 and the magnetostatic wave oscillating device may be entirely compensated and fixed by an impact absorbing elastic body or the like. As shown in FIG. 3, when the spacer 25 is fixed to the shield case 24 with the screw 26, the spacer 25 and the screw 26 are arranged so that the magnetic field does not leak from the magnetostatic wave oscillation device of the first embodiment. It is desirable that it is not a magnetic material. The spacer 25 is made of a material such as a metal or an impact-absorbing elastic body, so that the influence of damage or the like due to the impact acting on the shield case 24 is minimized. Even if a material such as a metal or a shock absorbing elastic body is used for the spacer 25, a shield case 24 is provided by providing a space 29 in the upper and back sides of the magnetostatic wave oscillation device of the first embodiment and in the lower portion of the driver circuit board 15. When an impact acts on the magnetostatic wave oscillating device of the first embodiment, the impact is not transmitted.
次に、本発明の第二実施例である静磁波発振装置について、図５を用いて説明する。図１に示す前述の第一実施例の静磁波発振装置は永久磁石２がフタ３に固定される構造であるのに対して、図５に示す第二実施例の静磁波発振装置は、永久磁石２がフタ３に固定されるのではなく、永久磁石２が磁石台座１５に固定される。この磁石台座１５はネジ部を有し、フタ３に設けたネジ穴１７に磁石台座１５のネジ部が噛み合うことにより、磁石台座１５を上下に移動させることが可能である。磁石台座１５を上下に移動させると、永久磁石２も上下に移動することで、空隙１１が変わるため、磁界１０の強さが変わり、その結果、静磁波素子１が出力する発振信号の発振周波数も変わる。即ち、第二実施例の静磁波発振装置では、磁界１０の強さを変えることで静磁波素子１が出力する発振信号の発振周波数を調整する際、電磁コイル８及びＦＭコイル９の各コイルに流れる電流の大きさ（電流値）を調整するだけでなく、磁石台座１５を上下に移動させることによっても行うこともできる。 Next, a magnetostatic wave oscillating device according to a second embodiment of the present invention will be described with reference to FIG. The magnetostatic wave oscillator of the first embodiment shown in FIG. 1 has a structure in which the permanent magnet 2 is fixed to the lid 3, whereas the magnetostatic wave oscillator of the second embodiment shown in FIG. The magnet 2 is not fixed to the lid 3 but the permanent magnet 2 is fixed to the magnet base 15. The magnet pedestal 15 has a screw portion, and the magnet pedestal 15 can be moved up and down by meshing the screw portion of the magnet pedestal 15 with a screw hole 17 provided in the lid 3. When the magnet pedestal 15 is moved up and down, the permanent magnet 2 is also moved up and down, so that the air gap 11 changes, so that the strength of the magnetic field 10 changes. As a result, the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 Will also change. That is, in the magnetostatic wave oscillating device of the second embodiment, when adjusting the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 by changing the strength of the magnetic field 10, each coil of the electromagnetic coil 8 and the FM coil 9 is adjusted. Not only can the magnitude (current value) of the flowing current be adjusted, but it can also be performed by moving the magnet base 15 up and down.
更に、第二実施例の静磁波発振装置では、磁石台座１５を下方に移動させた場合、上部磁極７が静磁波素子１に衝突して、静磁波素子１を破損することがないように、上部磁極７が静磁波素子１に衝突する前に、磁石台座１５の移動を停止させるためのストッパ機構を有している。具体的には、フタ３のネジ穴１７の下方では、穴の直径が磁石台座１５の外径（ネジの山同士の直径）より小さく、且つ、永久磁石２の直径よりも大きくしていることにより、磁石台座１５を下方に移動させた場合、上部磁極７が静磁波素子１に衝突する前に、磁石台座１５がフタ３に設けた突起部１８に接触して停止する構造となっている。 Furthermore, in the magnetostatic wave oscillating device of the second embodiment, when the magnet pedestal 15 is moved downward, the upper magnetic pole 7 does not collide with the magnetostatic wave element 1 and damage the magnetostatic wave element 1. A stopper mechanism is provided to stop the movement of the magnet base 15 before the upper magnetic pole 7 collides with the magnetostatic wave element 1. Specifically, below the screw hole 17 of the lid 3, the diameter of the hole is smaller than the outer diameter of the magnet base 15 (diameter of screw threads) and larger than the diameter of the permanent magnet 2. Thus, when the magnet pedestal 15 is moved downward, the magnet pedestal 15 comes into contact with the protrusion 18 provided on the lid 3 and stops before the upper magnetic pole 7 collides with the magnetostatic wave element 1. .
以上の通り、第二実施例の静磁波発振装置では、第一実施例の静磁波発振装置と同様にして、小型化すると共に、耐振動性及び接地性能が向上するだけでなく、磁石台座１５を上下に移動させることにより静磁波素子１出力の発振信号の発振周波数を調整することもできる。また、磁石台座１５を下方に移動させた場合、上部磁極７が静磁波素子１に衝突することによる静磁波素子１の破損を防止することもできる。なお、第二実施例の静磁波発振装置では、フタ３に設けたネジ穴１７に磁石台座１５に設けたネジ部が噛み合うことにより、磁石台座１５が上下する構造となっているが、ネジ穴１７ではなくフタに穴を設けると共に、穴の側面にガイドレールを設け、ガイドレールに沿って磁石台座２を摺動させるようにしても、同様にして、磁石台座１５を上下に移動させることにより静磁波素子１出力の発振信号の発振周波数を調整することもできる。更に、静磁波素子１出力の発振信号の発振周波数が所望の発振周波数となるように、磁石台座１５を上下させて磁界１０の強さを調整した後、磁石台座１５が動かないように固定するために、例えば、ネジ止め剤を塗布する。なお、磁石台座１５を突起部１８に接触させたまま固定する場合、締め付けネジ１６で締め付けた後、ネジ止め剤を塗布する。 As described above, in the magnetostatic wave oscillating device of the second embodiment, as well as the magnetostatic wave oscillating device of the first embodiment, not only the size is reduced, but also the vibration resistance and the grounding performance are improved. Can be adjusted up and down to adjust the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1. Further, when the magnet base 15 is moved downward, the magnetostatic wave element 1 can be prevented from being damaged by the upper magnetic pole 7 colliding with the magnetostatic wave element 1. In the magnetostatic wave oscillating device of the second embodiment, the magnet pedestal 15 is structured to move up and down by meshing the screw portion provided in the magnet pedestal 15 with the screw hole 17 provided in the lid 3. Even if a hole is provided in the lid instead of 17, a guide rail is provided on the side of the hole, and the magnet base 2 is slid along the guide rail, the magnet base 15 is moved up and down in the same manner. The oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 can also be adjusted. Further, after adjusting the strength of the magnetic field 10 by moving the magnet base 15 up and down so that the oscillation frequency of the oscillation signal output from the magnetostatic wave element 1 becomes a desired oscillation frequency, the magnet base 15 is fixed so as not to move. For this purpose, for example, a screwing agent is applied. In addition, when fixing the magnet base 15 in contact with the protrusion 18, the screw fixing agent is applied after tightening with the tightening screw 16.
そして、第二実施例の静磁波発振装置も、第一実施例の静磁波発振装置と同様にして、スペーサを介してドライバ回路基板が取り付けられると共に、ドライバ回路基板を取り付けた静磁波発振装置は、シールドケースに取り付けられる。 The magnetostatic wave oscillating device of the second embodiment is similar to the magnetostatic wave oscillating device of the first embodiment, in which the driver circuit board is attached via the spacer, and the magnetostatic wave oscillating device to which the driver circuit board is attached is Attached to shield case.
１：静磁波素子 ２：永久磁石
３：フタ ４：外部ヨーク
５：底板 ６：下部磁極
７：上部磁極 ８：電磁コイル
９：ＦＭコイル １０：磁界
１１：空隙 １２：発振回路基板
１３：銅板 １４：同軸線
１５：磁石台座 １６：締め付けネジ
１７：ネジ穴 １８：突起部
１９：ドライバ回路基板 ２０：スペーサ
２１：ネジ ２２：電磁コイル引き出し線
２３：ＦＭコイル引き出し線 ２４：シールドケース
２５：スペーサ ２６：ネジ
２７：ＲＦコネクタ ２８：静磁波発振装置
２９：空間
1: Magnetostatic element 2: Permanent magnet 3: Lid 4: External yoke 5: Bottom plate 6: Lower magnetic pole 7: Upper magnetic pole 8: Electromagnetic coil 9: FM coil 10: Magnetic field 11: Air gap 12: Oscillator circuit board 13: Copper plate 14 : Coaxial wire 15: Magnet base 16: Tightening screw 17: Screw hole 18: Projection 19: Driver circuit board 20: Spacer 21: Screw 22: Electromagnetic coil lead wire 23: FM coil lead wire 24: Shield case 25: Spacer 26 : Screw 27: RF connector 28: Magnetostatic wave oscillator 29: Space
Claims (7)
前記静磁波素子に印加する磁界の強さを変えることで前記発振信号の周波数を調整する１つ以上の電磁コイルを、前記永久磁石の外側で且つ前記筐体の内部に配置し、該配置により前記永久磁石の幅寸法を前記電磁コイルの幅寸法より小さくすることで、小型化するように構成したことを特徴とする静磁波発振装置。 A magnetostatic wave element and a permanent magnet for applying a magnetic field to the magnetostatic wave element are incorporated in a casing made of a ferromagnetic material, and the magnetostatic wave element generates an oscillation signal by the magnetic field applied from the permanent magnet. In the output magnetostatic wave oscillator,
One or more electromagnetic coils that adjust the frequency of the oscillation signal by changing the strength of the magnetic field applied to the magnetostatic wave element are disposed outside the permanent magnet and inside the housing, and A magnetostatic wave oscillation device characterized in that the permanent magnet is made smaller by making the width dimension of the permanent magnet smaller than the width dimension of the electromagnetic coil.
前記静磁波素子の真下の位置に凸部を有する底面部材を前記筐体に設けると共に、前記凸部の外側に前記凸部と同じ厚さの銅板を設け、前記底面部材の凸部と前記銅板とに前記基板を固定することで、外部振動に対する基板の揺れを抑えると共に、十分な接地が得られるように構成したことを特徴とする静磁波発振装置。 A magnetostatic wave element, a substrate on which the magnetostatic wave element is mounted, and a permanent magnet that applies a magnetic field to the magnetostatic wave element are housed in a housing made of a ferromagnetic material and including a top member. In the magnetostatic wave oscillating device in which a permanent magnet is fixed to the upper surface member, and the magnetostatic wave element outputs an oscillation signal with a magnetic field applied from the permanent magnet.
A bottom surface member having a convex portion at a position directly below the magnetostatic wave element is provided in the housing, and a copper plate having the same thickness as the convex portion is provided outside the convex portion, and the convex portion of the bottom surface member and the copper plate are provided. A magnetostatic wave oscillating device characterized in that, by fixing the substrate to each other, the substrate is prevented from shaking with respect to external vibrations and sufficient grounding is obtained.
前記上面部材にネジ穴を設けると共に、前記ネジ穴に噛み合うネジ部を有し前記永久磁石が固定される磁石台座を設け、該磁石台座を移動させることで変化する前記永久磁石と前記静磁波素子との距離に応じて前記磁界の強さが変化することで、前記磁石台座を移動させて前記静磁波素子が出力する発振信号の周波数を調整するように構成したことを特徴とする静磁波発振装置。 A magnetostatic wave element, a substrate on which the magnetostatic wave element is mounted, and a permanent magnet that applies a magnetic field to the magnetostatic wave element are incorporated in a housing made of a ferromagnetic material and including a top member. In the magnetostatic wave oscillating device in which the magnetostatic wave element outputs an oscillation signal with a magnetic field applied from a magnet,
The permanent magnet and the magnetostatic wave element that are changed by moving the magnet pedestal provided with a screw base that is provided with a screw hole in the upper surface member and that has a threaded portion that meshes with the screw hole and to which the permanent magnet is fixed. The magnetostatic wave oscillation is configured to adjust the frequency of the oscillation signal output from the magnetostatic wave element by moving the magnet base by changing the strength of the magnetic field according to the distance between the magnetostatic wave element and the magnetostatic wave element. apparatus.
前記電磁コイルとして、粗調整用電磁コイルと、微調整用電磁コイルとを有し、前記粗調整用電磁コイルで前記発振信号の発振周波数の粗調整を行い、前記微調整用電磁コイルで前記発振信号の発振周波数の微調整を行うように構成したことを特徴とする静磁波発振装置。 The magnetostatic wave oscillation device according to claim 1,
The electromagnetic coil includes a coarse adjustment electromagnetic coil and a fine adjustment electromagnetic coil. The coarse adjustment electromagnetic coil performs coarse adjustment of the oscillation frequency of the oscillation signal, and the fine adjustment electromagnetic coil performs the oscillation. A magnetostatic wave oscillating device configured to finely adjust an oscillation frequency of a signal.
前記筐体は、底面部材と側面部材とを有し、前記銅板を側面部材と底面部材との間に挟みこむことで、外部振動に対する基板の揺れを抑えると共に、十分な接地が得られるように構成したことを特徴とする静磁波発振装置。 In the magnetostatic wave oscillation device according to claim 2,
The housing includes a bottom member and a side member, and by sandwiching the copper plate between the side member and the bottom member, it suppresses shaking of the substrate with respect to external vibrations, and sufficient grounding is obtained. A magnetostatic wave oscillation device characterized by comprising.
前記磁石台座が下方に移動して所定位置にきた場合に前記磁石台座の底面が接触するよう、前記上面部材のネジ穴の下方にストッパを設け、前記磁石台座の移動による前記永久磁石の前記静磁波素子への衝突を防止するように構成したことを特徴とする静磁波発振装置。 In the magnetostatic wave oscillation device according to claim 3,
A stopper is provided below the screw hole of the upper surface member so that the bottom surface of the magnet base comes into contact when the magnet base moves downward and reaches a predetermined position, and the static magnet of the permanent magnet is moved by the movement of the magnet base. A magnetostatic wave oscillation device configured to prevent collision with a magnetic wave element.
前記基板に実装され、前記静磁波素子を含む全ての電子部品に、電源線と接地線とを有する同軸ケーブルで電源を供給するようにしたことを特徴とする静磁波発振装置。 The magnetostatic wave oscillation device according to claim 2,
A magnetostatic wave oscillating device characterized in that power is supplied to all electronic components mounted on the substrate and including the magnetostatic wave element by a coaxial cable having a power line and a ground line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006253200A JP2008078797A (en) | 2006-09-19 | 2006-09-19 | Magnetostatic oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006253200A JP2008078797A (en) | 2006-09-19 | 2006-09-19 | Magnetostatic oscillator |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2006253200A Pending JP2008078797A (en) | 2006-09-19 | 2006-09-19 | Magnetostatic oscillator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012526156A (en) * | 2009-05-06 | 2012-10-25 | エフピーイノベイションズ | Crystalline sulfated cellulose II and its production from sulfuric acid hydrolysis of cellulose |
| CN114689972A (en) * | 2022-03-28 | 2022-07-01 | 广东电网有限责任公司江门供电局 | Power distribution terminal hot plug module monitoring device and method based on electromagnetic monitoring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63228802A (en) * | 1987-03-18 | 1988-09-22 | Hitachi Ltd | Magnetostatic wave oscillation circuit |
| JPS6464410A (en) * | 1987-09-04 | 1989-03-10 | Hitachi Metals Ltd | Static magnetic wave variable resonator |
| JPH01236724A (en) * | 1987-11-27 | 1989-09-21 | Hitachi Metals Ltd | Chip for magnetostatic wave element and magnetostatic wave element |
-
2006
- 2006-09-19 JP JP2006253200A patent/JP2008078797A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63228802A (en) * | 1987-03-18 | 1988-09-22 | Hitachi Ltd | Magnetostatic wave oscillation circuit |
| JPS6464410A (en) * | 1987-09-04 | 1989-03-10 | Hitachi Metals Ltd | Static magnetic wave variable resonator |
| JPH01236724A (en) * | 1987-11-27 | 1989-09-21 | Hitachi Metals Ltd | Chip for magnetostatic wave element and magnetostatic wave element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012526156A (en) * | 2009-05-06 | 2012-10-25 | エフピーイノベイションズ | Crystalline sulfated cellulose II and its production from sulfuric acid hydrolysis of cellulose |
| CN114689972A (en) * | 2022-03-28 | 2022-07-01 | 广东电网有限责任公司江门供电局 | Power distribution terminal hot plug module monitoring device and method based on electromagnetic monitoring |
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