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JP2009076960A - Antenna device - Google Patents

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Publication number
JP2009076960A
JP2009076960A JP2007241169A JP2007241169A JP2009076960A JP 2009076960 A JP2009076960 A JP 2009076960A JP 2007241169 A JP2007241169 A JP 2007241169A JP 2007241169 A JP2007241169 A JP 2007241169A JP 2009076960 A JP2009076960 A JP 2009076960A
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Prior art keywords
antenna
conductor
inverted
shape
antenna device
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Japanese (ja)
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Nobuyasu Takemura
暢康 竹村
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority to JP2007241169A priority Critical patent/JP2009076960A/en
Priority to KR1020070134449A priority patent/KR101321375B1/en
Publication of JP2009076960A publication Critical patent/JP2009076960A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines

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  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-complementary antenna system capable of obtaining wide band characteristics without connecting a matching load. <P>SOLUTION: The self-complementary antenna system 20 includes: an antenna conductor 20 in an inverted F shape; a ground conductor 30 which is disposed apart at a position axisymmetrical to the antenna conductor 20 and has a cut portion 40 nearly as large as the antenna conductor 20 and in a shape axisymmetrical to the antenna conductor 20; a feed point 50 provided at a tip portion of a first branch F1 of the inverted F shape; and a short-circuit point 60 provided at a tip portion of a second branch F. Constant impedance characteristics can be obtained without fitting any matching load by varying the interval between the feed point 50 and short-circuit point 60 or changing the shape of the antenna conductor 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明はアンテナ装置に係り、より詳細には移動体端末に適用される広帯域アンテナ装置に関する。   The present invention relates to an antenna device, and more particularly to a broadband antenna device applied to a mobile terminal.

近年、無線通信システムはさまざまな用途に用いられるようになっており、無線通信端末にはしばしば複数の無線通信システムが搭載される。こうした無線通信端末には、小型且つ複数の周波数帯域で動作可能なアンテナを適用するのが望ましい。そこで、広帯域なアンテナ装置の開発が進められている。   In recent years, wireless communication systems have been used for various purposes, and wireless communication terminals are often equipped with a plurality of wireless communication systems. It is desirable to apply a small antenna that can operate in a plurality of frequency bands to such a wireless communication terminal. Therefore, development of a broadband antenna device is underway.

複数の周波数帯で動作するアンテナの例として、自己補対形状を有するアンテナが挙げられる。自己補対アンテナは複数の周波数帯域で動作することが可能であり、広帯域をカバーすることができるが、一定のインピーダンス特性を得るためには無限構造を有する必要がある。そこで、有限構造のアンテナを無限構造と等価として、全ての周波数帯域で一定のインピーダンスを得ることができるよう、例えば図１１に示すような自己補対アンテナ装置を用いることが考えられる。   An example of an antenna that operates in a plurality of frequency bands is an antenna having a self-complementary shape. The self-complementary antenna can operate in a plurality of frequency bands and can cover a wide band, but it is necessary to have an infinite structure in order to obtain a certain impedance characteristic. Therefore, it is conceivable to use a self-complementary antenna device as shown in FIG. 11, for example, so that a finite structure antenna can be equivalent to an infinite structure and constant impedance can be obtained in all frequency bands.

図１１において、軸対称の自己補対形状のモノポールアンテナ１０５は、給電点５０と、整合負荷８０とを有して構成されている。このような構成によれば、アンテナ導体部分の共振周波数からずれた場合、整合負荷８０で電力が消費されて、アンテナの放射効率が低下する。したがって、導体板切替回路（図示しない）により共振周波数を調整し、放射効率の低下を抑えることができる。   In FIG. 11, the axially symmetric self-complementary monopole antenna 105 includes a feeding point 50 and a matching load 80. According to such a configuration, when deviating from the resonance frequency of the antenna conductor portion, power is consumed by the matching load 80, and the radiation efficiency of the antenna is reduced. Therefore, the resonance frequency can be adjusted by a conductor plate switching circuit (not shown) to suppress a decrease in radiation efficiency.

自己補対形状のアンテナが広帯域で使用可能であることについては、例えば特許文献１および非特許文献１に示されている。特許文献１に記載の発明は複数の周波数で動作する自己補対アンテナ装置に関するものであり、導体板切替回路により高放射効率を得ることができる。また、非特許文献１には自己補対構造による逆Ｌアンテナに関する技術が記載されており、これによれば広帯域特性を得ることが可能である。
特開２００６−５６４７号公報 電子情報通信学会技術研究報告 Ａ・Ｐ ９４−２４（１９９４−０７） 藤島ほか 「自己補対構造による逆Ｌアンテナ」 For example, Patent Document 1 and Non-Patent Document 1 show that a self-complementary antenna can be used in a wide band. The invention described in Patent Document 1 relates to a self-complementary antenna device that operates at a plurality of frequencies, and a high radiation efficiency can be obtained by a conductor plate switching circuit. Non-Patent Document 1 describes a technique related to an inverted-L antenna having a self-complementary structure, and according to this, it is possible to obtain a wideband characteristic.
JP 2006-5647 A IEICE Technical Report A / P 94-24 (1994-07) Fujishima et al. "Reverse L Antenna with Self-Complementary Structure"

このように、自己補対型のアンテナは広帯域で使用可能である。しかしながら、導体板切替回路により共振周波数を調整した場合でも、整合負荷を接続すると、この抵抗部分で電力が消費され、アンテナの放射効率が低下してしまうという問題点がある。また、広帯域にわたり放射効率の低下を抑えるためには、複数の導体板切替器により共振周波数を調整しなければならず、多くのスイッチを必要とするため、構成が複雑化してしまう。
そこで、本発明は、整合負荷を接続することなく広帯域特性およびマルチバンド特性を得ることのできるアンテナ装置を提供することを目的とする。 Thus, the self-complementary antenna can be used in a wide band. However, even when the resonance frequency is adjusted by the conductor plate switching circuit, when a matching load is connected, there is a problem that power is consumed by this resistance portion and the radiation efficiency of the antenna is lowered. Further, in order to suppress a decrease in radiation efficiency over a wide band, the resonance frequency must be adjusted by a plurality of conductor plate switchers, and a large number of switches are required, which complicates the configuration.
Accordingly, an object of the present invention is to provide an antenna device that can obtain wideband characteristics and multiband characteristics without connecting matching loads.

前述の目的を達するため、本発明による自己補対型アンテナ装置は、第１及び第２の分岐部と基幹部とから一体に形成される逆Ｆ形状のアンテナ導体と、アンテナ導体と軸対称の位置に離隔して配置されアンテナ導体と略同一の大きさおよびアンテナ導体と軸対称の形状の切欠き部を備えた接地導体と、アンテナ導体に給電する給電点と、アンテナ導体と接地導体とを短絡する短絡点とを備える。給電点は逆Ｆ形状の第１および第２の分岐部のうち一方の先端部の一箇所に設けられ、短絡点は逆Ｆ形状の第１および第２の分岐部のうち他方の先端部の一箇所に設けられる。   In order to achieve the above-described object, a self-complementary antenna device according to the present invention includes an inverted F-shaped antenna conductor formed integrally with the first and second branch portions and the backbone portion, and an axially symmetric antenna conductor. A grounding conductor that is spaced apart from the antenna conductor and has a notch that is substantially the same size and symmetrical with the antenna conductor, a feeding point that feeds power to the antenna conductor, and the antenna conductor and grounding conductor. A short-circuit point for short-circuiting. The feeding point is provided at one end of one of the inverted F-shaped first and second branch portions, and the short-circuit point is provided at the other end of the inverted F-shaped first and second branch portions. Provided in one place.

この自己補対型アンテナ装置において、給電点は逆Ｆ形状の第１の分岐部に設けられ、短絡点は逆Ｆ形状の第２の分岐部に設けられてもよい。
逆Ｆ形状のアンテナ導体の第１の分岐部と基幹部との接合部には、基幹部を挟んで第１の分岐部と対向する位置に逆Ｌ形状のアンテナ導体の相対的に短い辺の先端部が結合されてもよい。その場合、給電点は逆Ｆ形状の第２の分岐部に設けられ、短絡点は逆Ｆ形状の第１の分岐部に設けられてもよい。 In this self-complementary antenna apparatus, the feeding point may be provided in the first branch portion having the inverted F shape, and the short-circuit point may be provided in the second branch portion having the inverted F shape.
At the junction between the first branch portion and the trunk portion of the inverted F-shaped antenna conductor, a relatively short side of the inverted L-shaped antenna conductor is positioned at a position facing the first branch portion with the trunk portion interposed therebetween. The tip may be joined. In this case, the feeding point may be provided at the second branch portion having the inverted F shape, and the short circuit point may be provided at the first branch portion having the inverted F shape.

本発明の自己補対型アンテナ装置において、アンテナ導体および接地導体の切欠き部は曲げられていてもよい。
また、アンテナ導体は逆Ｆ形状の基幹部に軸方向に伸長するスリットを有してもよい。
さらに、逆Ｆ形状の第１の分岐部と第２の分岐部とは、アンテナ装置の特性インピーダンスが６０πΩとなるように間隔および形状を調整して設けられてもよい。
アンテナ導体および接地導体は、直方体形状の誘電体表面上に形成されてアンテナ装置を立体的に構成してもよい。 In the self-complementary antenna device of the present invention, the cutout portions of the antenna conductor and the ground conductor may be bent.
The antenna conductor may have a slit extending in the axial direction in the inverted F-shaped trunk.
Furthermore, the first F branch portion and the second F branch portion having an inverted F shape may be provided by adjusting the interval and shape so that the characteristic impedance of the antenna device is 60πΩ.
The antenna conductor and the ground conductor may be formed on a rectangular parallelepiped dielectric surface to configure the antenna device in three dimensions.

本発明によれば、整合負荷を接続することなく、広帯域特性およびマルチバンド特性を備えた自己補対型アンテナ装置を得ることができる。このアンテナ装置は小型であり、また、全ての周波数帯域で一定のインピーダンスを得ることが可能である。   According to the present invention, it is possible to obtain a self-complementary antenna device having a wideband characteristic and a multiband characteristic without connecting a matching load. This antenna device is small in size and can obtain a constant impedance in all frequency bands.

以下、図面を参照して本発明の好適な実施形態を説明する。   Preferred embodiments of the present invention will be described below with reference to the drawings.

［実施形態１］
図１は本発明の第一の実施形態によるアンテナ装置の全体構成を概略的に示した図である。また、図２には図１において破線で囲んだ部分を拡大して示す。
図示するように、アンテナ装置１０１は、逆Ｆ形状のアンテナ導体２０と、このアンテナ導体２０と一定の間隔をあけて配置された接地導体３０とから構成されている。接地導体３０には、アンテナ導体２０と軸対称で略同一の大きさおよび形状を有する切欠き部４０が形成されている。導体片３０ａはアンテナ導体２０や接地導体３０と接するものではなく、電気的に浮いている。アンテナ導体２０は、逆Ｆ形状の第１の分岐Ｆ１の先端部に設けられた給電点５０において給電され、第２の分岐Ｆ２の先端部に設けられた短絡点６０において短絡される。 [Embodiment 1]
FIG. 1 is a diagram schematically showing an overall configuration of an antenna device according to a first embodiment of the present invention. FIG. 2 is an enlarged view of a portion surrounded by a broken line in FIG.
As shown in the figure, the antenna device 101 includes an inverted F-shaped antenna conductor 20 and a ground conductor 30 disposed at a predetermined interval from the antenna conductor 20. The ground conductor 30 is formed with a notch 40 that is axially symmetric with the antenna conductor 20 and has substantially the same size and shape. The conductor piece 30a is not in contact with the antenna conductor 20 or the ground conductor 30, but is electrically floating. The antenna conductor 20 is fed at a feeding point 50 provided at the tip of the inverted F-shaped first branch F1, and short-circuited at a short-circuit point 60 provided at the tip of the second branch F2.

ここで、逆Ｆ形状のアンテナは、基幹部Ｆ３の一部の長さＬと、第２の分岐Ｆ２の長さｈとの和（Ｌ＋ｈ）が概ね１／４λとなる周波数で動作し、給電点と短絡点との間隔を変更したり、給電部分および短絡部分におけるアンテナ導体２０の形状を変化させたりすることにより、アンテナの入力インピーダンスを調整することができる。例えば、ｈの長さを短くするとインピーダンスが低下する。   Here, the inverted F-shaped antenna operates at a frequency at which the sum (L + h) of the length L of a part of the backbone F3 and the length h of the second branch F2 is approximately 1 / 4λ, The input impedance of the antenna can be adjusted by changing the distance between the point and the short-circuit point or by changing the shape of the antenna conductor 20 in the feeding portion and the short-circuit portion. For example, when the length of h is shortened, the impedance is lowered.

本実施例のアンテナ装置１０１においても、給電点５０と短絡点６０との間隔や、アンテナ導体２０の給電部分および短絡部分の形状を変化させて、入力インピーダンスを調整することにより、有限構造であっても整合負荷を取り付けることなく一定のインピーダンスを得ることができる。この実施例においては、特性インピーダンスは６０πΩである。   The antenna device 101 of this embodiment also has a finite structure by adjusting the input impedance by changing the distance between the feeding point 50 and the short-circuiting point 60 and the shape of the feeding part and the short-circuiting part of the antenna conductor 20. However, a constant impedance can be obtained without attaching a matching load. In this embodiment, the characteristic impedance is 60πΩ.

図３に示すのは、こうしたアンテナ装置１０１におけるＶＳＷＲの周波数特性の一例である。同図より明らかなように、単一の逆Ｆ形状のアンテナを用いた場合、端末アンテナに好適とされる３より小さいＶＳＷＲが得られる帯域は僅かである。これに対し、アンテナ装置１０１によれば、広帯域にわたって３よりも小さいＶＳＷＲが得られることがわかる。   FIG. 3 shows an example of the frequency characteristic of VSWR in such an antenna device 101. As is clear from the figure, when a single inverted F-shaped antenna is used, the band in which a VSWR smaller than 3 suitable for a terminal antenna is obtained is small. On the other hand, according to the antenna device 101, it can be seen that a VSWR smaller than 3 can be obtained over a wide band.

［実施形態２］
図４は、本発明の第二の実施形態によるアンテナ装置の全体構成を概略的に示したものである。図５には図４において破線で囲んだ部分を拡大して示す。第一の実施形態と第二の実施形態とは大部分において同一の構成であるため、同一の点に関しては詳細な説明を省略する。 [Embodiment 2]
FIG. 4 schematically shows the overall configuration of the antenna device according to the second embodiment of the present invention. FIG. 5 is an enlarged view of a portion surrounded by a broken line in FIG. Since the first embodiment and the second embodiment have the same configuration in most cases, detailed description of the same points is omitted.

第一の実施形態と異なる点として、第二の実施形態においては、アンテナ導体２０の給電点５０が逆Ｆ形状の第２の分岐Ｆ２の先端部に設けられる。また、短絡点６０は第１の分岐Ｆ１の先端部に設けられる。第一の実施形態によるアンテナ装置１０１と同様、アンテナ装置１０２においても、給電点５０と短絡点６０との間隔を変更したり、給電部分および短絡部分の導体形状を変化させたりすることにより、入力インピーダンスを調整することができる。   As a point different from the first embodiment, in the second embodiment, the feeding point 50 of the antenna conductor 20 is provided at the tip of the second branch F2 having an inverted F shape. Moreover, the short circuit point 60 is provided in the front-end | tip part of the 1st branch F1. Similar to the antenna device 101 according to the first embodiment, also in the antenna device 102, an input can be performed by changing the interval between the feeding point 50 and the short-circuit point 60 or changing the conductor shape of the feeding portion and the short-circuit portion. Impedance can be adjusted.

図６に示すのは、こうしたアンテナ装置１０２におけるＶＳＷＲの周波数特性の一例である。第一の実施例におけるアンテナ装置１０１と同様、単一の逆Ｆ形状のアンテナを用いる場合に比べ、非常に広帯域にわたって３よりも小さいＶＳＷＲが得られることがわかる。   FIG. 6 shows an example of the frequency characteristics of VSWR in such an antenna device 102. As with the antenna device 101 in the first embodiment, it can be seen that a VSWR smaller than 3 can be obtained over a very wide band as compared with the case of using a single inverted F-shaped antenna.

［実施形態３］
図７（ａ）は、本発明の第三の実施形態によるアンテナ装置１０３の斜視図である。第三の実施形態は、第一または第二の実施形態によるアンテナ装置を立体的に構成したものである。 [Embodiment 3]
FIG. 7A is a perspective view of the antenna device 103 according to the third embodiment of the present invention. In the third embodiment, the antenna device according to the first or second embodiment is three-dimensionally configured.

アンテナ装置１０３は、直方体形状のポリカーボネート等の誘電体（図示しない）の外面上にアンテナ導体２０および接地導体３０を蒸着またはエッチング等により形成したものを幅５０ｍｍ、長さ１００ｍｍの接地導体７０に取り付けることにより構成されている。給電点および短絡点は、それぞれアンテナ導体２０の第１の分岐Ｆ１または第２の分岐Ｆ２のいずれかに設けられる。   The antenna device 103 is formed by depositing the antenna conductor 20 and the ground conductor 30 on the outer surface of a rectangular parallelepiped dielectric material (not shown) such as polycarbonate by vapor deposition or etching or the like and is attached to the ground conductor 70 having a width of 50 mm and a length of 100 mm. It is constituted by. The feeding point and the short-circuit point are provided in either the first branch F1 or the second branch F2 of the antenna conductor 20, respectively.

誘電体を用いることにより波長短縮効果が得られるので、本実施形態によれば、アンテナ装置１０３を小型化することが可能となる。なお、図７（ｃ）に示すのは、これをＡ、Ｂ、Ｃ、Ｄの各方向から見た様子である。   Since the wavelength shortening effect can be obtained by using the dielectric, according to the present embodiment, the antenna device 103 can be downsized. Note that FIG. 7C shows a state in which this is viewed from the A, B, C, and D directions.

図７（ｂ）は、図７（ａ）のアンテナ装置１０３の平面図である。接地導体７０は示していない。このアンテナ装置１０３において、アンテナ導体２０には、逆Ｆ形状の基幹部Ｆ３にスリット２１０が設けられている。また、接地導体３０には、アンテナ導体２０と軸対称で略同一の大きさおよび形状を有する切欠き部４０が形成されている。スリットは必ずしも設けなくてもよいが、スリットの配置や間隔、長さを変化させることにより、アンテナの入力インピーダンスを調整することが可能である。   FIG. 7B is a plan view of the antenna device 103 of FIG. The ground conductor 70 is not shown. In this antenna device 103, the antenna conductor 20 is provided with a slit 210 in the inverted F-shaped trunk F 3. Further, the ground conductor 30 is formed with a notch 40 that is axially symmetric with the antenna conductor 20 and has substantially the same size and shape. Although the slit is not necessarily provided, the input impedance of the antenna can be adjusted by changing the arrangement, interval, and length of the slit.

このようなアンテナ装置１０３のＶＳＷＲの周波数特性は、例えば図８に示すようになる。同図からは、主に高い周波数の広帯域において３よりも小さいＶＳＷＲが得られることがわかる。   The frequency characteristic of the VSWR of such an antenna device 103 is as shown in FIG. 8, for example. From the figure, it can be seen that a VSWR smaller than 3 is obtained mainly in a wide band of high frequency.

［実施形態４］
図９（ａ）に示すのは、本発明の第四の実施形態によるアンテナ装置１０４の斜視図である。第四の実施形態は、第三の実施形態を変形させたものであり、逆Ｆ形状のアンテナ導体に逆Ｌ形状のアンテナ導体を結合させて、立体的なアンテナ装置１０４を構成している。 [Embodiment 4]
FIG. 9A is a perspective view of the antenna device 104 according to the fourth embodiment of the present invention. The fourth embodiment is a modification of the third embodiment, and a three-dimensional antenna device 104 is configured by coupling an inverted L-shaped antenna conductor to an inverted F-shaped antenna conductor.

アンテナ導体２０および接地導体３０は、第一の実施形態と同様、直方体形状のポリカーボネート等の誘電体（図示しない）の外面上に蒸着またはエッチング等により形成され、これが接地導体７０に取り付けられることにより、アンテナ装置１０４が構成される。給電点および短絡点は、それぞれアンテナ導体２０の第１の分岐Ｆ１または第２の分岐Ｆ２のいずれかに設けられる。図９（ｃ）に示すのは、このアンテナ装置１０４をＡ、Ｂ、Ｃ、Ｄの各方向から見た様子である。   As in the first embodiment, the antenna conductor 20 and the ground conductor 30 are formed on the outer surface of a dielectric (not shown) such as a rectangular parallelepiped polycarbonate by vapor deposition or etching, and are attached to the ground conductor 70. The antenna device 104 is configured. The feed point and the short-circuit point are provided in either the first branch F1 or the second branch F2 of the antenna conductor 20, respectively. FIG. 9C shows the antenna device 104 viewed from the A, B, C, and D directions.

図９（ｂ）は、接地導体７０を除いたアンテナ装置１０４の平面図である。第三の実施形態の場合と同様、アンテナ導体２０には、逆Ｆ形状の基幹部Ｆ３にスリット２１０が設けられている。さらに、本実施例においては、アンテナ導体２０が逆Ｆ形状のアンテナ導体と逆Ｌ形状のアンテナ導体とから構成されており、アンテナ長が長くなっている。   FIG. 9B is a plan view of the antenna device 104 excluding the ground conductor 70. As in the case of the third embodiment, the antenna conductor 20 is provided with a slit 210 in the inverted F-shaped trunk portion F3. Furthermore, in this embodiment, the antenna conductor 20 is composed of an inverted F-shaped antenna conductor and an inverted L-shaped antenna conductor, and the antenna length is long.

図９（ｂ）において、アンテナ導体２０の下部は逆Ｆ形状のアンテナ導体２０１、上部が逆Ｌ形状のアンテナ導体２０２である。すなわち、逆Ｌ形状のアンテナ導体２０２を、軸が逆Ｆ形状のアンテナ導体２０１の軸と平行になるように配置して、短い方の辺の先端を逆Ｆ形状の第１の分岐部Ｆ１と基幹部Ｆ３との接合部に結合する。   In FIG. 9B, the lower part of the antenna conductor 20 is an inverted F-shaped antenna conductor 201, and the upper part is an inverted L-shaped antenna conductor 202. That is, the inverted L-shaped antenna conductor 202 is arranged so that the axis is parallel to the axis of the inverted F-shaped antenna conductor 201, and the tip of the shorter side is connected to the first F-shaped branch F1 having the inverted F shape. It couple | bonds with the junction part with basic | foundation part F3.

このように逆Ｆ形状のアンテナ導体に逆Ｌ形状のアンテナ導体を結合することにより、アンテナ長が変更されて、低周波数帯域でもアンテナを動作させることが可能となる。逆Ｆ形状のアンテナ導体のみで低周波数帯域を使用するにはアンテナ導体を大型化する必要が生じるが、本実施形態によれば、広帯域特性を有する逆Ｆ形状のアンテナ導体と、低周波数帯域で動作する逆Ｌ形状のアンテナ導体とを組み合わせることにより、大型化を回避できる。また、図１０に示すように、広帯域にわたってＶＳＷＲが３より小さく、且つ低周波数帯域においても共振特性を得ることのできる、マルチバンド特性を有するアンテナ装置とすることが可能となる。   By coupling the inverted L-shaped antenna conductor to the inverted F-shaped antenna conductor in this way, the antenna length is changed and the antenna can be operated even in a low frequency band. In order to use the low frequency band with only the inverted F-shaped antenna conductor, it is necessary to increase the size of the antenna conductor. However, according to the present embodiment, the inverted F-shaped antenna conductor having wideband characteristics and the low frequency band By combining with an operating inverted L-shaped antenna conductor, an increase in size can be avoided. Further, as shown in FIG. 10, it is possible to provide an antenna device having multiband characteristics in which VSWR is smaller than 3 over a wide band and resonance characteristics can be obtained even in a low frequency band.

以上、本発明の好適な実施形態を説明したが、各実施例における導体の形状や基板の大きさ等に関する記載は本発明を限定するものではなく、適宜変更することが可能である。   The preferred embodiments of the present invention have been described above. However, the description regarding the shape of the conductor, the size of the substrate, and the like in each example does not limit the present invention and can be changed as appropriate.

本発明の第一の実施形態によるアンテナ装置の概略全体図。1 is a schematic overall view of an antenna device according to a first embodiment of the present invention. 本発明の第一の実施形態によるアンテナ装置の拡大図。The enlarged view of the antenna apparatus by 1st embodiment of this invention. 本発明の第一の実施形態によるアンテナ装置のＶＳＷＲ周波数特性を示す図。The figure which shows the VSWR frequency characteristic of the antenna apparatus by 1st embodiment of this invention. 本発明の第二の実施形態によるアンテナ装置の概略全体図。The schematic whole figure of the antenna device by 2nd embodiment of this invention. 本発明の第二の実施形態によるアンテナ装置の拡大図。The enlarged view of the antenna device by 2nd embodiment of this invention. 本発明の第二の実施形態によるアンテナ装置のＶＳＷＲ周波数特性を示す図。The figure which shows the VSWR frequency characteristic of the antenna device by 2nd embodiment of this invention. 本発明の第三の実施形態によるアンテナ装置を立体的に構成した場合の斜視図。The perspective view at the time of comprising the antenna device by 3rd embodiment of this invention in three dimensions. 本発明の第三の実施形態によるアンテナ装置を立体的に構成した場合の平面図。The top view at the time of comprising three-dimensionally the antenna device by 3rd embodiment of this invention. は本発明の第三の実施形態によるアンテナ装置を立体的に構成した場合の上面、側面および底面図。These are the upper surface, side surface, and bottom view at the time of comprising the antenna apparatus by 3rd embodiment of this invention in three dimensions. 本発明の第三の実施形態によるアンテナ装置のＶＳＷＲ周波数特性を示す図。The figure which shows the VSWR frequency characteristic of the antenna device by 3rd embodiment of this invention. 本発明の第四の実施形態によるアンテナ装置を立体的に構成した場合の斜視図。The perspective view at the time of comprising the antenna apparatus by 4th embodiment of this invention in three dimensions. 本発明の第四の実施形態によるアンテナ装置を立体的に構成した場合の平面図。The top view at the time of comprising three-dimensionally the antenna device by 4th embodiment of this invention. 本発明の第四の実施形態によるアンテナ装置を立体的に構成した場合の上面、側面および底面図。The upper surface, the side surface, and bottom view at the time of comprising the antenna apparatus by 4th embodiment of this invention in three dimensions. 本発明の第四の実施形態によるアンテナ装置のＶＳＷＲ周波数特性を示す図。The figure which shows the VSWR frequency characteristic of the antenna device by 4th embodiment of this invention. 従来の自己補対型モノポールアンテナを説明する図。The figure explaining the conventional self-complementary monopole antenna.

符号の説明Explanation of symbols

１０１〜１０５ アンテナ装置
２０ アンテナ導体
Ｆ１ 第１の分岐
Ｆ２ 第２の分岐
Ｆ３ 基幹部
３０ 接地導体
４０ 切欠き部
５０ 給電点
６０ 短絡点
７０ 接地導体
８０ 整合負荷 101 to 105 Antenna device 20 Antenna conductor F1 First branch F2 Second branch F3 Core 30 Ground conductor 40 Notch 50 Feed point 60 Short-circuit point 70 Ground conductor 80 Matching load

Claims (8)

第１および第２の分岐部と基幹部とから一体に形成される逆Ｆ形状のアンテナ導体と、
前記アンテナ導体と軸対称の位置に離隔して配置され、前記アンテナ導体と略同一の大きさおよび前記アンテナ導体と軸対称の形状の切欠き部を備えた接地導体と、
前記アンテナ導体に給電する給電点と、
前記アンテナ導体と前記接地導体とを短絡する短絡点と、
を備え、
前記給電点は前記逆Ｆ形状の前記第１および第２の分岐部のうち一方の先端部の一箇所に設けられ、
前記短絡点は前記逆Ｆ形状の前記第１および第２の分岐部のうち他方の先端部の一箇所に設けられることを特徴とする自己補対型アンテナ装置。 An inverted F-shaped antenna conductor integrally formed from the first and second branch portions and the backbone portion;
A grounding conductor that is spaced apart from the antenna conductor in an axially symmetric position, and has a cutout portion that is substantially the same size as the antenna conductor and is axially symmetric with the antenna conductor;
A feeding point for feeding power to the antenna conductor;
A short-circuit point for short-circuiting the antenna conductor and the ground conductor;
With
The feeding point is provided at one point of one of the first and second branch portions of the inverted F shape,
The short circuit point is provided at one point of the other tip of the first and second branch portions having the inverted F shape. 前記給電点は前記逆Ｆ形状の前記第１の分岐部に設けられ、前記短絡点は前記逆Ｆ形状の前記第２の分岐部に設けられることを特徴とする請求項１に記載の自己補対型アンテナ装置。   2. The self-complement according to claim 1, wherein the feeding point is provided in the first branch portion having the inverted F shape, and the short-circuit point is provided in the second branch portion having the inverted F shape. Pair type antenna device. 前記逆Ｆ形状のアンテナ導体の前記第１の分岐部と前記基幹部との接合部には、前記基幹部を挟んで前記第１の分岐部と対向する位置に逆Ｌ形状のアンテナ導体の相対的に短い辺の先端部が結合されることを特徴とする請求項１に記載の自己補対型アンテナ装置。   At the joint between the first branch portion and the trunk portion of the inverted F-shaped antenna conductor, the opposite L-shaped antenna conductor is positioned at a position facing the first branch portion with the trunk portion interposed therebetween. 2. The self-complementary antenna device according to claim 1, wherein tips of short sides are coupled. 前記給電点は前記逆Ｆ形状の前記第２の分岐部に設けられ、前記短絡点は前記逆Ｆ形状の前記第１の分岐部に設けられることを特徴とする請求項３に記載の自己補対型アンテナ装置。   The self-compensation according to claim 3, wherein the feeding point is provided in the second branch portion having the inverted F shape, and the short-circuit point is provided in the first branch portion having the inverted F shape. Pair type antenna device. 前記アンテナ導体および前記接地導体の切欠き部は折り曲げられていることを特徴とする請求項１乃至４のいずれかに記載の自己補対型アンテナ装置。   The self-complementary antenna device according to any one of claims 1 to 4, wherein the cutout portions of the antenna conductor and the ground conductor are bent. 前記アンテナ導体は前記逆Ｆ形状の前記基幹部に軸方向に伸長するスリットを有することを特徴とする請求項１乃至５のいずれかに記載の自己補対型アンテナ装置。   6. The self-complementary antenna device according to claim 1, wherein the antenna conductor has a slit extending in the axial direction in the backbone portion of the inverted F shape. 前記逆Ｆ形状の前記第１の分岐部と前記第２の分岐部とは、前記アンテナ装置の特性インピーダンスが６０πΩとなるように間隔および形状を調整して設けられることを特徴とする請求項１乃至６のいずれかに記載の自己補対型アンテナ装置。   2. The first branch portion and the second branch portion having the inverted F shape are provided with an interval and a shape adjusted so that a characteristic impedance of the antenna device is 60πΩ. The self-complementary antenna device according to any one of 1 to 6. 前記アンテナ導体および前記接地導体は、直方体形状の誘電体表面上に形成されて前記アンテナ装置を立体的に構成することを特徴とする請求項１乃至７のいずれかに記載の自己補対型アンテナ装置。   The self-complementary antenna according to any one of claims 1 to 7, wherein the antenna conductor and the ground conductor are formed on a rectangular parallelepiped dielectric surface to form the antenna device three-dimensionally. apparatus.
JP2007241169A 2007-09-18 2007-09-18 Antenna device Pending JP2009076960A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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JP2018166294A (en) * 2017-03-28 2018-10-25 学校法人智香寺学園 Dual polarized antenna
JP2018170561A (en) * 2017-03-29 2018-11-01 学校法人智香寺学園 Circularly polarized antenna
CN113767525A (en) * 2019-06-11 2021-12-07 惠普发展公司，有限责任合伙企业 Antenna with complementary monopole and slot

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US8872706B2 (en) 2010-11-05 2014-10-28 Apple Inc. Antenna system with receiver diversity and tunable matching circuit
KR101484950B1 (en) * 2014-08-29 2015-01-26 충남대학교산학협력단 Spherical self-complementary broadband antenna
CN109860980B (en) * 2019-03-01 2024-04-16 深圳市信维通信股份有限公司 Mobile terminal

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018166294A (en) * 2017-03-28 2018-10-25 学校法人智香寺学園 Dual polarized antenna
JP2018170561A (en) * 2017-03-29 2018-11-01 学校法人智香寺学園 Circularly polarized antenna
CN113767525A (en) * 2019-06-11 2021-12-07 惠普发展公司，有限责任合伙企业 Antenna with complementary monopole and slot

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