JP2003017929A - Broadband sleeve antenna - Google Patents
Broadband sleeve antennaInfo
- Publication number
- JP2003017929A JP2003017929A JP2001203968A JP2001203968A JP2003017929A JP 2003017929 A JP2003017929 A JP 2003017929A JP 2001203968 A JP2001203968 A JP 2001203968A JP 2001203968 A JP2001203968 A JP 2001203968A JP 2003017929 A JP2003017929 A JP 2003017929A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- antenna
- insulating material
- material cover
- parasitic element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Aerials With Secondary Devices (AREA)
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Abstract
(57)【要約】
【課題】スリーブアンテナの周波数帯域を拡張する。
【解決手段】同軸給電線路２０を使用波長の略０．２５
倍の長さのスリーブ５で覆う。スリーブ５より露出する
同軸給電線路２０の先端部分から外部導体３を取り除
き、使用波長の略０．２５倍の長さの放射部４を形成す
る。無給電素子６をスリーブ５と略同一径の円筒導体に
より形成し、絶縁材カバー７の外面に貼り付けて、放射
部４に軸線を一致させた状態で被せる。
(57) [Summary] To extend the frequency band of a sleeve antenna. A coaxial feed line (20) has a wavelength of about 0.25.
Cover with double sleeve 5. The outer conductor 3 is removed from the end of the coaxial feed line 20 exposed from the sleeve 5 to form the radiation part 4 having a length of about 0.25 times the used wavelength. The parasitic element 6 is formed of a cylindrical conductor having substantially the same diameter as the sleeve 5, is attached to the outer surface of the insulating material cover 7, and covers the radiating section 4 in a state where the axis is aligned.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＥＭＩ測定用や、
無線ＬＡＮ或いはＩＭＴ２０００等の送受信に用いられ
る広帯域スリーブアンテナに関する。TECHNICAL FIELD The present invention relates to EMI measurement,
The present invention relates to a wideband sleeve antenna used for transmitting / receiving a wireless LAN or IMT2000.
【０００２】[0002]
【従来の技術】ＥＭＩ測定や無線ＬＡＮ等に用いられる
アンテナとしてスリーブアンテナが知られている。従来
のスリーブアンテナは、同軸給電線路を覆う使用波長の
略０．２５倍の長さのスリーブと、スリーブより露出す
る同軸給電線路の先端部分から外部導体を取り除いて形
成された使用波長の略０．２５倍の長さの放射部とから
構成されていた。2. Description of the Related Art A sleeve antenna is known as an antenna used for EMI measurement and wireless LAN. A conventional sleeve antenna has a sleeve having a length of about 0.25 times the wavelength used, which covers the coaxial feed line, and a used wavelength formed by removing the outer conductor from the tip of the coaxial feed line exposed from the sleeve. It was composed of a .25 times longer radiator.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来のアンテ
ナは、スリーブの漏洩電流阻止作用が狭い帯域にしかお
よばないため、比帯域が小さくなり、実用可能な周波数
帯域が狭いという問題点があった。また例えば、ＥＭＩ
測定用に本アンテナを使用した場合（中心周波数ｆ0＝
１．３２２ＧＨｚ）、図１１に示すように、ＶＳＷＲ
１．５以下を満たす周波数幅ｆ2は９０ＭＨｚ程とな
り、比帯域は６〜７％となる。したがって、１基のアン
テナが備える利用可能な周波数帯域が狭いため、測定周
波数全域をカバーするためには少なくとも１４種類の異
なる寸法形状のスリーブアンテナを用意しなければなら
なかった。However, in the conventional antenna, the leakage current blocking action of the sleeve extends only to a narrow band, so that the ratio band becomes small and the practical frequency band is narrow. . Also, for example, EMI
When this antenna is used for measurement (center frequency f 0 =
1.322 GHz), as shown in FIG. 11, VSWR
The frequency width f 2 that satisfies 1.5 or less is about 90 MHz, and the relative bandwidth is 6 to 7%. Therefore, since one antenna has a narrow usable frequency band, at least 14 kinds of sleeve antennas having different sizes and shapes have to be prepared in order to cover the entire measurement frequency range.
【０００４】こうした問題に鑑み、本発明は、より広い
周波数帯域を備えた広帯域スリーブアンテナの実現を課
題とする。In view of these problems, an object of the present invention is to realize a wideband sleeve antenna having a wider frequency band.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明による広
帯域スリーブアンテナは、同軸給電線路を覆う使用波長
の略０．２５倍の長さのスリーブと、スリーブより露出
する前記同軸給電線路の先端部分から外部導体を取り除
いて形成された使用波長の略０．２５倍の長さの放射部
とを備え、スリーブと略同一径の円筒導体により形成し
た無給電素子を放射部に軸線を一致させて被せて構成さ
れる。A wideband sleeve antenna according to the invention of claim 1 is a sleeve having a length of about 0.25 times a wavelength used for covering a coaxial feed line, and a tip of the coaxial feed line exposed from the sleeve. A radiation element having a length of approximately 0.25 times the wavelength used, which is formed by removing the outer conductor from the portion, and a parasitic element formed of a cylindrical conductor having substantially the same diameter as that of the sleeve is aligned with the axis of the radiation portion. It is composed by covering.
【０００６】請求項２の発明による広帯域スリーブアン
テナは、スリーブを覆う絶縁材カバーを備え、該絶縁材
カバーに無給電素子を保持して構成される。A broadband sleeve antenna according to a second aspect of the present invention comprises an insulating material cover for covering the sleeve, and a parasitic element is held by the insulating material cover.
【０００７】請求項３の発明による広帯域スリーブアン
テナは、スリーブを覆う絶縁材カバーを備え、該絶縁材
カバーに保持部材を収容し、保持部材に無給電素子を保
持して構成される。A broadband sleeve antenna according to a third aspect of the present invention comprises an insulating material cover for covering the sleeve, a holding member is housed in the insulating material cover, and a parasitic element is held by the holding member.
【０００８】[0008]
【発明の実施の形態】以下に、本発明の実施の形態を図
面に基づいて説明する。図１乃至図３は本発明に係る広
帯域スリーブアンテナの第１実施形態を示す。図１は広
帯域スリーブアンテナの軸線を含む断面図、図２は図１
のＡ−Ａ線端面図、図３は図１のＢ−Ｂ線端面図であ
る。本アンテナ１ａは、同軸給電線路２０にスリーブ５
と放射部４とを設け、スリーブ５と略同一径の無給電素
子６を放射部４に被せて構成されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of a wideband sleeve antenna according to the present invention. FIG. 1 is a sectional view including the axis of the wideband sleeve antenna, and FIG. 2 is FIG.
3 is an end view taken along line AA of FIG. 3, and FIG. 3 is an end view taken along line BB of FIG. The antenna 1a includes a coaxial feed line 20 and a sleeve 5
And the radiation portion 4 are provided, and the radiation portion 4 is covered with a parasitic element 6 having substantially the same diameter as the sleeve 5.
【０００９】同軸給電線路２０は、中心導体２を内部絶
縁体２ａを介して外部導体３により被覆し、最外周を保
護被覆１０で覆った同軸構造を備えてなる。スリーブ５
は使用波長の略０．２５倍の長さＬ１の円筒形薄板導体
で形成され、その上端は外部導体３に半田付け等により
接続されている。The coaxial feed line 20 has a coaxial structure in which the center conductor 2 is covered with the outer conductor 3 via the inner insulator 2a and the outermost periphery is covered with the protective coating 10. Sleeve 5
Is formed of a cylindrical thin plate conductor having a length L1 which is approximately 0.25 times the used wavelength, and its upper end is connected to the outer conductor 3 by soldering or the like.
【００１０】放射部４は、スリーブ５より露出する同軸
給電線路２０の先端部分から外部導体３を取り除くこと
により、使用波長の略０．２５倍の長さＬ２で形成され
ている。そして、同軸給電線路２０の内部絶縁体２ａ
が、放射部４において中心導体２を支持する部材として
機能している。尚、放射部４から内部絶縁体２ａを取り
除き、別の支持部材で中心導体２を支持しても良い。The radiation portion 4 is formed to have a length L2 that is approximately 0.25 times the used wavelength by removing the outer conductor 3 from the tip portion of the coaxial feed line 20 exposed from the sleeve 5. Then, the inner insulator 2a of the coaxial feed line 20
, But functions as a member that supports the central conductor 2 in the radiating portion 4. The inner insulator 2a may be removed from the radiating section 4 and the center conductor 2 may be supported by another supporting member.
【００１１】同軸給電線路２０の基端部には、送信或い
は受信装置接続用のコネクタ３０が設けられている。コ
ネクタ３０は、外部導体３と導通するネジ部１１と中心
導体２と導通する中心端子１３との間に絶縁スペーサ１
５を介在させて構成されている。コネクタ３０の外周に
はスリーブ５に密着する円筒形の樹脂等で形成された絶
縁材カバー７が嵌着されている。At the base end of the coaxial feed line 20, a connector 30 for connecting a transmitting or receiving device is provided. The connector 30 includes an insulating spacer 1 between a screw portion 11 that is electrically connected to the outer conductor 3 and a center terminal 13 that is electrically connected to the center conductor 2.
5 is interposed. On the outer periphery of the connector 30, an insulating material cover 7 made of a resin or the like and having a cylindrical shape that is in close contact with the sleeve 5 is fitted.
【００１２】絶縁材カバー７はスリーブ５及び放射部４
を覆い得る長さに形成されている。絶縁材カバー７の内
側には放射部４の基端を位置決めする支持板９が配置さ
れ、絶縁材カバー７の突端には放射部４の先端を位置決
めする蓋板８が被せられている。The insulating material cover 7 includes a sleeve 5 and a radiating portion 4.
Is formed to a length that can cover the. A support plate 9 for positioning the base end of the radiating portion 4 is arranged inside the insulating material cover 7, and a cover plate 8 for positioning the tip end of the radiating portion 4 is covered on the protruding end of the insulating material cover 7.
【００１３】無給電素子６は使用波長の略０．２５倍の
長さＬ３の薄膜円筒導体で形成され、絶縁材カバー７の
外面に貼り付けられている。その直径φは使用波長の略
０．２５倍である。そして、蓋板８及び支持板９は放射
部４を絶縁材カバー７の軸線上に保持し、無給電素子６
を放射部４の軸線と一致させている。The parasitic element 6 is formed of a thin film cylindrical conductor having a length L3 which is approximately 0.25 times the wavelength used, and is attached to the outer surface of the insulating material cover 7. The diameter φ is approximately 0.25 times the wavelength used. The lid plate 8 and the support plate 9 hold the radiating portion 4 on the axis of the insulating material cover 7, and the parasitic element 6
Are aligned with the axis of the radiating section 4.
【００１４】尚、使用波長をλとして、無給電素子６の
長さＬ３は０．１２５λ〜０．３７５λ、無給電素子６
の直径φは０．０５λ〜０．３λの各設定寸法の範囲内
で広帯域スリーブアンテナ１ａを構成しても良い。支持
板９からコネクタ３０までの同軸給電線路２０の長さＬ
４は、スリーブ５の長さＬ１の略１．３倍に形成されて
いる。The length L3 of the parasitic element 6 is 0.125λ to 0.375λ, where the wavelength used is λ, and the parasitic element 6 has a length of L3.
The wide-band sleeve antenna 1a may be configured such that the diameter φ is within the range of each set dimension of 0.05λ to 0.3λ. Length L of coaxial feed line 20 from support plate 9 to connector 30
4 is approximately 1.3 times the length L1 of the sleeve 5.
【００１５】図４は、ＥＭＩ測定用（中心周波数ｆ0＝
１．３２２ＧＨｚ）に上述した広帯域スリーブアンテナ
１ａを使用した場合のＶＳＷＲ周波数特性図である。こ
の特性図から、ＶＳＷＲ１．５以下を満たす周波数幅ｆ
1は２８３ＭＨｚ程となり、比帯域１９％を確保できる
ことがわかる。FIG. 4 is a diagram for EMI measurement (center frequency f 0 =
It is a VSWR frequency characteristic figure when the above-mentioned wideband sleeve antenna 1a is used for 1.322 GHz. From this characteristic diagram, the frequency width f that satisfies VSWR 1.5 or less
1 becomes about 283 MHz, and it can be seen that a specific bandwidth of 19% can be secured.
【００１６】このように、第１実施形態の広帯域スリー
ブアンテナ１ａは、スリーブ５と略同一径の無給電素子
６を放射部４に軸線を一致させて被せたので、例えば、
ＥＭＩ測定用に本アンテナ１ａを使用した場合、従来６
〜７％であった比帯域を１９％に大きくすることがで
き、利用可能な周波数帯域を広くすることができる。し
たがって、この測定周波数全域をカバーするために必要
なアンテナを、従来の１４種類から、６、７種類に減ら
すことができる。As described above, in the wideband sleeve antenna 1a of the first embodiment, the parasitic element 6 having substantially the same diameter as that of the sleeve 5 is covered on the radiating portion 4 so that the axis line is aligned.
When this antenna 1a is used for EMI measurement, the conventional 6
It is possible to increase the ratio band from ˜7% to 19% and widen the available frequency band. Therefore, the number of antennas required to cover the entire measurement frequency range can be reduced from the conventional 14 types to 6 or 7 types.
【００１７】図５及び図６は、上記第１実施形態の変更
例を示す。図５の広帯域スリーブアンテナ１ｂにおいて
は、同軸給電線路２０から保護被覆１０（図１、図３参
照）が取り除かれ、外部導体３とスリーブ５の間に空洞
部が設けられている。外部導体３はコネクタ３０と一体
にパイプ状に形成され、その上端部にスリーブ５の蓋部
９ａが半田付けにより接続されている。5 and 6 show a modification of the first embodiment. In the broadband sleeve antenna 1b of FIG. 5, the protective coating 10 (see FIGS. 1 and 3) is removed from the coaxial feed line 20, and a cavity is provided between the outer conductor 3 and the sleeve 5. The outer conductor 3 is formed in a pipe shape integrally with the connector 30, and the lid 9a of the sleeve 5 is connected to the upper end of the outer conductor 3 by soldering.
【００１８】図６の広帯域スリーブアンテナ１ｃにおい
ては、外部導体３とスリーブ５の間に空洞部が設けら
れ、外部導体３に黄銅等の導電材料からなるパイプが用
いられている。外部導体３の下端はコネクタ３０のネジ
部１１に、上端部はスリーブ５の蓋部９ａにそれぞれ半
田付けにより接続されている。In the broadband sleeve antenna 1c shown in FIG. 6, a cavity is provided between the outer conductor 3 and the sleeve 5, and the outer conductor 3 is made of a pipe made of a conductive material such as brass. The lower end of the outer conductor 3 is connected to the screw portion 11 of the connector 30 and the upper end thereof is connected to the lid portion 9a of the sleeve 5 by soldering.
【００１９】これらのスリーブアンテナ１ｂ，１ｃによ
っても、図１のアンテナ１ａと同様の効果を得ることが
できる。尚、スリーブ５の蓋部９ａは放射部４の基端を
位置決めする機能を持つが、スリーブ５を図示例よりも
小径に形成し、スリーブ５と絶縁材カバー７との間に隙
間を設けて実施することも可能である。With these sleeve antennas 1b and 1c, the same effect as that of the antenna 1a of FIG. 1 can be obtained. The lid portion 9a of the sleeve 5 has a function of positioning the base end of the radiating portion 4, but the sleeve 5 is formed to have a smaller diameter than the illustrated example, and a gap is provided between the sleeve 5 and the insulating material cover 7. It is also possible to carry out.
【００２０】図７乃至図９は、本発明に係る広帯域スリ
ーブアンテナの第２実施形態を示す。本アンテナ１ｄ
は、絶縁材カバー７の内側に無給電素子６の保持部材と
して保持筒１４を収容している。この保持筒１４は樹脂
等により円筒形に形成され、外面に使用波長の略０．２
５倍の長さＬ３の薄膜円筒導体からなる無給電素子６が
貼り付けられ、無給電素子６により放射部４が覆われて
いる。7 to 9 show a wide band sleeve antenna according to a second embodiment of the present invention. This antenna 1d
Holds a holding cylinder 14 as a holding member of the parasitic element 6 inside the insulating material cover 7. The holding cylinder 14 is formed of resin or the like into a cylindrical shape, and has an outer surface with a wavelength of approximately 0.2.
A parasitic element 6 made of a thin-film cylindrical conductor having a length L3 of 5 times is attached, and the parasitic element 6 covers the radiation portion 4.
【００２１】本アンテナ１ｄにおいて、絶縁材カバー７
内に配置された支持板９は、蓋板８とで放射部４の両端
を位置決めする機能に加えて、保持筒１４に貼着された
無給電素子６とスリーブ５とを絶縁する機能も果たして
いる。その他の構成は第１実施形態と同様である。In the present antenna 1d, the insulating material cover 7
The support plate 9 disposed inside has a function of positioning both ends of the radiating portion 4 with the lid plate 8 and also a function of insulating the parasitic element 6 and the sleeve 5 attached to the holding cylinder 14 from each other. There is. Other configurations are similar to those of the first embodiment.
【００２２】この広帯域スリーブアンテナ１ｄによって
も、第１実施形態のアンテナ１ａと同様の効果を得るこ
とができる。さらに、無給電素子６を絶縁材カバー７に
収容したので、耐候性を向上できる。The broadband sleeve antenna 1d can also achieve the same effect as the antenna 1a of the first embodiment. Furthermore, since the parasitic element 6 is housed in the insulating material cover 7, the weather resistance can be improved.
【００２３】尚、本発明は上記実施形態に限定されるも
のではなく、以下に例示するように、本発明の趣旨を逸
脱しない範囲で各部の形状並びに構成を適宜に変更して
実施することも可能である。
（１）本アンテナを無線ＬＡＮ、ＩＭＴ２０００等の使
用周波数に対応した形状寸法で構成すること。
（２）図１０のアンテナ１ｅに示すように、同軸給電線
路を同軸ケーブル２１で構成すること。本アンテナ１ｅ
の放射部４は、同軸ケーブル２１の先端から編組３ａと
外部被覆１０ａを取り除いて形成され、スリーブ５の蓋
部９ａは編組３ａの端部とハンダ付けにより接続され
る。スリーブ５を覆う絶縁材カバー７は、その内側に放
射部４を覆う無給電素子６を保持し、ボトムキャップ１
６により同軸ケーブル２１に支持されている。同軸ケー
ブル２１は、ボトムキャップ１６からさらに所要の長さ
延設され、その端部には送信或いは受信装置接続用のコ
ネクタ３１が装着されている。こうすれば別体の延長ケ
ーブル等を使用することなく離れた位置の送受信装置等
にもアンテナ１ｅを接続することができる。尚、スリー
ブ５は、放射部４から取り除いた編組３ａを外部被覆１
０ａの外側へ折り返して形成しても良い。
（３）絶縁材カバー及び保持筒をＡＢＳ、ＦＲＰ或いは
ＡＥＳ樹脂等で形成しても良い。
（４）無給電素子をＰＥＴフィルム等にアルミや銅等を
蒸着して設けたり、肉厚の円筒導体で形成すること。
（５）第１実施形態において、無給電素子を絶縁材カバ
ーの内側に設けること。
（６）第２実施形態において、無給電素子を保持筒の内
側に設けること。
（７）保持部材を円筒形の保持筒だけでなく、例えば十
字形の板状体に形成してその交差部に放射部を挿通し無
給電素子を保持すること。
（８）コネクタの形状をＦ型，ＦＴ型等のプラグ形又は
ジャック形に形成すること。The present invention is not limited to the above-described embodiment, and as illustrated below, the shape and configuration of each part may be appropriately changed without departing from the spirit of the present invention. It is possible. (1) This antenna must be configured with a shape and size that corresponds to the frequency used, such as wireless LAN and IMT2000. (2) As shown in the antenna 1e of FIG. 10, the coaxial feed line should be composed of the coaxial cable 21. This antenna 1e
The radiating part 4 is formed by removing the braid 3a and the outer coating 10a from the tip of the coaxial cable 21, and the lid part 9a of the sleeve 5 is connected to the end of the braid 3a by soldering. The insulating material cover 7 that covers the sleeve 5 holds the parasitic element 6 that covers the radiating portion 4 inside the insulating material cover 7.
It is supported by the coaxial cable 21 by 6. The coaxial cable 21 is further extended from the bottom cap 16 by a required length, and a connector 31 for connecting a transmitter or a receiver is attached to the end of the coaxial cable 21. In this way, the antenna 1e can be connected to a transmitter / receiver at a remote position without using a separate extension cable or the like. The sleeve 5 has the braid 3a removed from the radiating portion 4 as the outer coating 1
It may be formed by folding back to the outside of 0a. (3) The insulating material cover and the holding cylinder may be made of ABS, FRP, AES resin, or the like. (4) The parasitic element is provided by vapor-depositing aluminum or copper on a PET film or the like, or is formed of a thick-walled cylindrical conductor. (5) In the first embodiment, the parasitic element is provided inside the insulating material cover. (6) In the second embodiment, the parasitic element is provided inside the holding cylinder. (7) The holding member is formed not only in a cylindrical holding cylinder but also in, for example, a cross-shaped plate body, and the radiation portion is inserted at the intersection to hold the parasitic element. (8) Form the connector into a plug type such as F type or FT type or a jack type.
【００２４】[0024]
【発明の効果】以上詳述したように、請求項１の発明に
よれば、スリーブと略同一径の無給電素子を放射部に軸
線を一致させて被せたので、周波数帯域を広くすること
ができる。As described above in detail, according to the first aspect of the invention, since the radiation portion is covered with the parasitic element having the same diameter as that of the sleeve with the axis line aligned, the frequency band can be widened. it can.
【００２５】請求項２の発明によれば、無給電素子を絶
縁材カバーに保持したので、無給電素子を放射部に対し
正確に同軸配置することができる。According to the second aspect of the present invention, since the parasitic element is held by the insulating material cover, the parasitic element can be accurately arranged coaxially with the radiation portion.
【００２６】請求項３の発明によれば、無給電素子を絶
縁材カバーの内側において保持部材に保持したので、無
給電素子の耐候性を向上できる。According to the third aspect of the invention, since the parasitic element is held by the holding member inside the insulating material cover, the weather resistance of the parasitic element can be improved.
【図１】本発明に係る第１実施形態を示す広帯域スリー
ブアンテナの断面図である。FIG. 1 is a cross-sectional view of a wideband sleeve antenna showing a first embodiment according to the present invention.
【図２】図１のＡ−Ａ線端面図である。FIG. 2 is an end view taken along the line AA of FIG.
【図３】図１のＢ−Ｂ線端面図である。FIG. 3 is an end view taken along line BB of FIG.
【図４】図１のアンテナのＶＳＷＲ周波数特性図であ
る。FIG. 4 is a VSWR frequency characteristic diagram of the antenna of FIG.
【図５】図１のアンテナの変更例を示す断面図である。5 is a cross-sectional view showing a modified example of the antenna of FIG.
【図６】図１のアンテナの別の変更例を示す断面図であ
る。FIG. 6 is a cross-sectional view showing another modification of the antenna of FIG.
【図７】本発明に係る第２実施形態を示す広帯域スリー
ブアンテナの断面図である。FIG. 7 is a cross-sectional view of a wideband sleeve antenna showing a second embodiment according to the present invention.
【図８】図７のＣ−Ｃ線端面図である。FIG. 8 is an end view taken along line CC of FIG.
【図９】図７のＤ−Ｄ線端面図である。9 is an end view taken along the line DD of FIG.
【図１０】本発明に係る広帯域スリーブアンテナの他の
実施形態を示す断面図である。FIG. 10 is a sectional view showing another embodiment of the wideband sleeve antenna according to the present invention.
【図１１】従来のアンテナのＶＳＷＲ周波数特性図であ
る。FIG. 11 is a VSWR frequency characteristic diagram of a conventional antenna.
１ａ，１ｂ，１ｃ，１ｄ，１ｅ・・スリーブアンテナ、
２・・中心導体、２ａ・・内部絶縁体、３・・外部導
体、３ａ・・編組、４・・放射部、５・・スリーブ、６
・・無給電素子、７・・絶縁材カバー、１０・・保護被
覆、１０ａ・・外部被覆、１４・・保持筒、２０・・同
軸給電線路。1a, 1b, 1c, 1d, 1e ... Sleeve antenna,
2 ... Central conductor, 2a ... Inner insulator, 3 ... Outer conductor, 3a ... Braid, 4 ... Radiating part, 5 ... Sleeve, 6
・ ・ Non-feeding element, 7 ・ ・ Insulating material cover, 10 ・ ・ Protective coating, 10a ・ ・ External coating, 14 ・ ・ Holding tube, 20 ・ ・ Coaxial feeding line
Claims (3)
５倍の長さのスリーブと、スリーブより露出する前記同
軸給電線路の先端部分から外部導体を取り除いて形成さ
れた使用波長の略０．２５倍の長さの放射部とを備え、
スリーブと略同一径の円筒導体により形成した無給電素
子を放射部に軸線を一致させて被せてなる広帯域スリー
ブアンテナ。1. A used wavelength of about 0.2 covering a coaxial feed line.
A sleeve having a length of 5 times and a radiating portion having a length of approximately 0.25 times a wavelength used, which is formed by removing an outer conductor from a tip portion of the coaxial feed line exposed from the sleeve,
A broadband sleeve antenna in which a parasitic element formed of a cylindrical conductor having substantially the same diameter as that of a sleeve is covered on the radiating portion with its axis aligned.
絶縁材カバーに無給電素子を保持した請求項１記載の広
帯域スリーブアンテナ。2. The broadband sleeve antenna according to claim 1, further comprising: an insulating material cover for covering the sleeve, wherein the parasitic material is held on the insulating material cover.
絶縁材カバーに保持部材を収容し、保持部材に無給電素
子を保持した請求項１記載の広帯域スリーブアンテナ。3. The broadband sleeve antenna according to claim 1, further comprising an insulating material cover for covering the sleeve, wherein the insulating material cover houses a holding member, and the holding member holds the parasitic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001203968A JP2003017929A (en) | 2001-07-04 | 2001-07-04 | Broadband sleeve antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001203968A JP2003017929A (en) | 2001-07-04 | 2001-07-04 | Broadband sleeve antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003017929A true JP2003017929A (en) | 2003-01-17 |
Family
ID=19040518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001203968A Pending JP2003017929A (en) | 2001-07-04 | 2001-07-04 | Broadband sleeve antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003017929A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006029813A (en) * | 2004-07-12 | 2006-02-02 | Ntt Docomo Inc | Electric field sensor and electric field strength measuring device |
| WO2012141289A1 (en) * | 2011-04-15 | 2012-10-18 | 株式会社サクマアンテナ | Antenna |
| DE102013219377A1 (en) * | 2013-09-26 | 2015-03-26 | Tyco Electronics Amp Gmbh | ANTENNA ARRANGEMENT WITH ANTENNA UNIT AND CONNECTOR UNIT |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117141U (en) * | 1977-02-25 | 1978-09-18 | ||
| JPS61146011U (en) * | 1985-02-27 | 1986-09-09 | ||
| JPH0969723A (en) * | 1995-08-31 | 1997-03-11 | Nippon Dengiyou Kosaku Kk | Whip antenna |
| JPH1098333A (en) * | 1996-07-18 | 1998-04-14 | Matsushita Electric Ind Co Ltd | Mobile radio antenna |
| WO2001011899A1 (en) * | 1999-08-11 | 2001-02-15 | Allgon Ab | Dual band antenna device |
-
2001
- 2001-07-04 JP JP2001203968A patent/JP2003017929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53117141U (en) * | 1977-02-25 | 1978-09-18 | ||
| JPS61146011U (en) * | 1985-02-27 | 1986-09-09 | ||
| JPH0969723A (en) * | 1995-08-31 | 1997-03-11 | Nippon Dengiyou Kosaku Kk | Whip antenna |
| JPH1098333A (en) * | 1996-07-18 | 1998-04-14 | Matsushita Electric Ind Co Ltd | Mobile radio antenna |
| WO2001011899A1 (en) * | 1999-08-11 | 2001-02-15 | Allgon Ab | Dual band antenna device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006029813A (en) * | 2004-07-12 | 2006-02-02 | Ntt Docomo Inc | Electric field sensor and electric field strength measuring device |
| WO2012141289A1 (en) * | 2011-04-15 | 2012-10-18 | 株式会社サクマアンテナ | Antenna |
| DE102013219377A1 (en) * | 2013-09-26 | 2015-03-26 | Tyco Electronics Amp Gmbh | ANTENNA ARRANGEMENT WITH ANTENNA UNIT AND CONNECTOR UNIT |
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