JPH0241003A - Dipole antenna - Google Patents
Dipole antennaInfo
- Publication number
- JPH0241003A JPH0241003A JP19069088A JP19069088A JPH0241003A JP H0241003 A JPH0241003 A JP H0241003A JP 19069088 A JP19069088 A JP 19069088A JP 19069088 A JP19069088 A JP 19069088A JP H0241003 A JPH0241003 A JP H0241003A
- Authority
- JP
- Japan
- Prior art keywords
- dipole antenna
- antenna
- shape
- branch conductors
- length
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 21
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、例えば２Ｇ１１ｚの比較的高い周波数帯にお
いて広帯域アンテナとして使用されるダイポールアンテ
ナに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dipole antenna used as a wideband antenna in a relatively high frequency band of 2G11z, for example.
［従来の技術］
従来、広帯域に亙り安定した利得特性と入力インピーダ
ンス特性を有する線状アンテナとしては、ロンビック型
、Ｖ型、対数周期型、魚骨型、双枝型等のアンテナがあ
げられる。[Prior Art] Conventionally, linear antennas having stable gain characteristics and input impedance characteristics over a wide band include rhombic type, V-type, log-periodic type, fishbone type, twin-branch type antennas, and the like.
Ｃ発明が解決しようとする課題］
しかしながら、上記にあげた各種の広帯域アンテナは、
その何れもが、所謂、進行波形のアンテナであり、使用
周波数の波長に比べかなり大きな構造となってしまう欠
点がある。Problems to be solved by the invention C] However, the various wideband antennas listed above,
All of these antennas are so-called traveling wave antennas, and have the disadvantage that they are considerably larger in size than the wavelength of the frequency used.
本発明は上記のような問題点に鑑みなされたもので、広
帯域において安定した利得特性及び入力インピーダンス
特性を損うことなく、小型化することが可能になるダイ
ポールアンテナを提供することを目的とする。The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a dipole antenna that can be miniaturized without impairing stable gain characteristics and input impedance characteristics over a wide band. .
［課題を解決するための手段及び作用］すなわち本発明
に係わるダイポールアンテナは、例えば全長１波長程度
のＶ型ダイポールアンテナの７字導線に、それぞれ７字
の外側方向へ延び、且つＶ字間口方向に行くに従って短
い長さとなる複数の分岐導線を平行配列して接続し、Ｖ
字間口側にてより低いインピーダンス特性を得て、アン
テナ終端からの後進波の抑制を図ったものである。[Means and effects for solving the problem] In other words, the dipole antenna according to the present invention has, for example, a V-shaped dipole antenna having a total length of about one wavelength, with each wire extending in the outside direction of the V-shaped dipole antenna, and extending in the direction of the V-shaped frontage. A plurality of branch conductors whose lengths become shorter as they go to V are connected in parallel.
The aim is to obtain lower impedance characteristics on the character front side and suppress backward waves from the end of the antenna.
［実施例］ 以下図面を参照して本発明の一実施例を説明する。[Example] An embodiment of the present invention will be described below with reference to the drawings.
第１図はその平面構成を示すもので、同図において、１
０は給電部であり、まず、この給電部１０を中心にして
開き角２θのＶ型ダイポールアンテナとなる導線１１ａ
、ｌｌｂが延設される。Figure 1 shows its plan configuration, and in the figure, 1
0 is a power feeding section, and first, a conductive wire 11a that becomes a V-shaped dipole antenna with an opening angle of 2θ is connected to the feeding section 10.
, llb are extended.
このＶ型ダイポールアンテナの各導線１１ａ。Each conducting wire 11a of this V-type dipole antenna.
１１ｂには、Ｖ字の外側方向に向けた複数の分岐導線１
２ａ、１２ｂ、１２ｃ、・・・が平行配列して接続され
る。11b includes a plurality of branch conductors 1 directed toward the outside of the V-shape.
2a, 12b, 12c, . . . are connected in parallel.
ここで、上記分岐導線１２ａ、１２ｂ、１２ｃ。Here, the branch conducting wires 12a, 12b, 12c.
・・・は、それぞれ隣接する導線と電気的に結合して放
射素子ともなるが、構造的にはテーパ線路に装荷した開
放スタブと見なせる。すなわち、Ｖ型ダイポールアンテ
ナの長さ（））を小型化のため１波長（λ０）程度に設
定すると、通常、アンテナ終端側からの後進波が大きく
なり、良好な広帯域特性が得られなくなる。そこで、こ
のアンテナ終端側からの後進波を少なくするには、開放
分岐導体を装荷して等価的にテーパ線路の特性インピー
ダンスを変化させ、これにより減衰のある進行波を発生
させればよいと考えられる。. . . are each electrically coupled to an adjacent conducting wire and serve as a radiating element, but structurally they can be regarded as open stubs loaded onto a tapered line. That is, if the length ( ) of the V-type dipole antenna is set to about one wavelength (λ0) for miniaturization, normally the backward wave from the antenna terminal side becomes large, making it impossible to obtain good broadband characteristics. Therefore, in order to reduce this backward wave from the antenna terminal side, we thought that it would be best to load an open branch conductor to equivalently change the characteristic impedance of the tapered line, thereby generating an attenuated traveling wave. It will be done.
つまり、上記ダイポールアンテナの給電部１０において
は、分岐導線１２ａ、１２ｂの長さｉｓ−λｏ／２とし
て高インピーダンスを得、そしてアンテナ終端方向に向
かって等間隔配列のスタブ長、すなわち分岐導線の長さ
を１２ａ＞１２ｃ＞−，１２ｂ＞１２ｄ＞−・・と短く
して低インピーダンス化する。こうして、アンテナの終
端側から発生する後進波の抑制を図ることができる。That is, in the power feeding section 10 of the dipole antenna, high impedance is obtained by setting the lengths of the branch conductors 12a and 12b to is-λo/2, and the length of the stubs arranged at equal intervals toward the end of the antenna, that is, the length of the branch conductors. The impedance is reduced by shortening the length as 12a>12c>-, 12b>12d>-, etc. In this way, backward waves generated from the terminal end side of the antenna can be suppressed.
ここで、第１図におけるダイポールアンテナにおいて、
１ｓ−ｏ、’５λｏ 、 ！−０，８３３λ０、ｄ−０
，０３３λ（、，２ａ−０，００８λ０、θ−１５″と
する。Here, in the dipole antenna in Fig. 1,
1s-o,'5λo,! -0,833λ0, d-0
,033λ(,,2a-0,008λ0,θ-15'').
第２図は使用周波数ｆ（、−２ＧＨｚとした上記ダイポ
ールアンテナの前方及び後方利得特性を示すもので、実
線及びＱ印で示すＧｆが前方利得の計算値及び測定値、
破線及びＸ印で示すＧｂが後方利得の計算値及び測定値
である。この場合、給電部１０から前進波が進む方向を
前方とする。つまり、前方利得Ｇｒと後方利得Ｇｂとの
利得差がこのダイポールアンテナの前後利得比となり、
比帯域（２：１）にて前後利得比は約１０ｄＢとなって
いる。Figure 2 shows the forward and backward gain characteristics of the above dipole antenna at the operating frequency f (, -2 GHz. Gf shown by the solid line and Q mark is the calculated value and measured value of the forward gain,
Gb indicated by the broken line and the X mark is the calculated value and measured value of the backward gain. In this case, the direction in which the forward wave travels from the power feeding unit 10 is defined as the front. In other words, the gain difference between the front gain Gr and the rear gain Gb is the front and rear gain ratio of this dipole antenna,
In the ratio band (2:1), the front and rear gain ratio is approximately 10 dB.
また、第３図は上記第２図のアンテナ利得特性に対応す
る入力アドミタンス特性を示すもので、特性帯域中には
各分岐導線１２ａ、１２ｂ。Further, FIG. 3 shows the input admittance characteristic corresponding to the antenna gain characteristic shown in FIG.
１２Ｃ１・・・が共振することによるデツプ現象も見ら
れず、比較的平坦な広帯域特性を示している。No dip phenomenon due to resonance of 12C1, etc. is observed, and relatively flat broadband characteristics are exhibited.
したがって、アンテナの全長ノを１波長程度に小型化し
ても、良好な利得特性及び入力インピーダンス特性を広
帯域に亙って得ることができる。Therefore, even if the total length of the antenna is reduced to about one wavelength, good gain characteristics and input impedance characteristics can be obtained over a wide band.
尚、上記実施例では、Ｖ型ダイポールアンテナの各導線
１１ａ、ｌｌｂに接続した分岐導線１２ ａ 、 １
２ ｂ 、 １２ ｃ 、−−−を、Ｖ字中心線に対
し垂直となる方向に配列したが、第４図に示すように、
Ｖ字間口方向に所定角度やや傾斜して配列してもよい。In the above embodiment, the branch conductors 12 a and 1 connected to the respective conductors 11 a and llb of the V-type dipole antenna
2 b , 12 c , --- were arranged in a direction perpendicular to the V-shaped center line, but as shown in Fig. 4,
They may be arranged slightly inclined at a predetermined angle in the direction of the V-shaped frontage.
また、上記実施例では、Ｖ型ダイポールアンテナの各導
線１１ａ、ｌｌｂに対する分岐導線１２ａ、１２ｂ、１
２ｃ、・・・の配列間隔は全て均等に設定したが、第５
図に示すように、給電部１０側からアンテナ終端側に向
けて等比級数的あるいは等等級数的に規則変化させても
よい。Further, in the above embodiment, branch conductors 12a, 12b, 1 for each conductor 11a, llb of the V-type dipole antenna.
The array intervals of 2c, ... were all set equally, but the 5th
As shown in the figure, it may be regularly changed in a geometric series or in a geometric progression from the power feeding unit 10 side toward the antenna termination side.
さらに、上記分岐導線１２ ａ、 １２ ｂ、 １
２ ｃ。Further, the branch conductors 12 a, 12 b, 1
2 c.
・・・の長さは、使用周波数帯域に合わせて変化可能で
あるのは勿論である。It goes without saying that the length of . . . can be changed depending on the frequency band used.
［発明の効果］
以上のように本発明によれば、例えば全長１波長程度の
Ｖ型ダイポールアンテナのｖ字導線に、それぞれＶ字の
外側方向へ延び、且つＶ字間口方向に行くに従って短い
長さとなる複数の分岐導線を平行配列して接続し、Ｖ字
間口側にてより低いインピーダンス特性を得て、アンテ
ナ終端からの後進波の抑制を図ったので、広帯域におい
て安定した利得特性及び入力インピーダンス特性を損う
ことなく、小型化することが可能になるダイポールアン
テナを提供できる。[Effects of the Invention] As described above, according to the present invention, for example, a V-shaped conductive wire of a V-shaped dipole antenna having a total length of about one wavelength is provided with lengths that extend toward the outside of the V shape and become shorter toward the V-shaped frontage. By connecting multiple branch conductors in parallel, we obtained lower impedance characteristics on the V-shaped frontage side and suppressed backward waves from the antenna terminal, resulting in stable gain characteristics and input impedance over a wide band. It is possible to provide a dipole antenna that can be made smaller without impairing its characteristics.
第１図は本発明の一実施例に係わるダイポールアンテナ
を示す平面構成図、第２図は上記ダイポールアンテナの
利得特性を示す図、第３図は上記ダイポールアンテナの
入力アドミタンス特性を示す図、第４図及び第５図はそ
れぞれ本発明の他の実施例を示す図である。
１０・・・給電部、ｌｌａ、ｌｌｂ・・・Ｖ字グイポー
ルの導線、１２ａ、１２ｂ、１２ｃ、−・・分岐導線。FIG. 1 is a plan configuration diagram showing a dipole antenna according to an embodiment of the present invention, FIG. 2 is a diagram showing the gain characteristics of the dipole antenna, FIG. 3 is a diagram showing the input admittance characteristics of the dipole antenna, and FIG. 4 and 5 are diagrams showing other embodiments of the present invention, respectively. DESCRIPTION OF SYMBOLS 10... Power supply part, lla, llb... Conductor wire of V-shaped guipole, 12a, 12b, 12c, --- Branch conductor wire.
Claims (1)
てなるＶ型ダイポールアンテナと、このＶ型ダイポール
アンテナの各導線に対してＶ字の外側方向へ向けて複数
本平行配列して接続されＶ字の開口方向に行くに従って
短い長さとなる分岐導線とを具備したことを特徴とする
ダイポールアンテナ。A V-shaped dipole antenna consists of a conductor extending from a feeding point at a preset V-shaped opening angle, and a plurality of conductors are arranged in parallel toward the outside of the V-shape for each conductor of this V-shaped dipole antenna. 1. A dipole antenna characterized by comprising a branch conductor wire that is connected to the V-shape and whose length becomes shorter toward the opening direction of the V-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19069088A JPH0241003A (en) | 1988-08-01 | 1988-08-01 | Dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19069088A JPH0241003A (en) | 1988-08-01 | 1988-08-01 | Dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0241003A true JPH0241003A (en) | 1990-02-09 |
| JPH0584081B2 JPH0584081B2 (en) | 1993-11-30 |
Family
ID=16262246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19069088A Granted JPH0241003A (en) | 1988-08-01 | 1988-08-01 | Dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241003A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2430081B (en) * | 2004-03-05 | 2008-10-08 | Ibm | Integrated multiband antennas for computing devices |
| US20140313091A1 (en) * | 2011-11-04 | 2014-10-23 | Brocoli Co., Ltd. | Slot-type augmented antenna |
| US10265590B2 (en) | 2014-02-20 | 2019-04-23 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10279233B2 (en) | 2014-02-20 | 2019-05-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| JP2021018786A (en) * | 2019-07-19 | 2021-02-15 | 大王製紙株式会社 | Rfid tag, plastic bottle and antenna |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5812462B2 (en) * | 2011-03-17 | 2015-11-11 | 国立大学法人広島大学 | Inter-chip communication system and semiconductor device |
-
1988
- 1988-08-01 JP JP19069088A patent/JPH0241003A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2430081B (en) * | 2004-03-05 | 2008-10-08 | Ibm | Integrated multiband antennas for computing devices |
| US20140313091A1 (en) * | 2011-11-04 | 2014-10-23 | Brocoli Co., Ltd. | Slot-type augmented antenna |
| JP2015501097A (en) * | 2011-11-04 | 2015-01-08 | ブロコリ カンパニー リミテッド | Slot augmentation antenna |
| US9413070B2 (en) | 2011-11-04 | 2016-08-09 | Brocoli Co., Ltd. | Slot-type augmented antenna |
| US10265590B2 (en) | 2014-02-20 | 2019-04-23 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10279233B2 (en) | 2014-02-20 | 2019-05-07 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| US10293229B2 (en) | 2014-02-20 | 2019-05-21 | Parsons Xtreme Golf, LLC | Golf club heads and methods to manufacture golf club heads |
| JP2021018786A (en) * | 2019-07-19 | 2021-02-15 | 大王製紙株式会社 | Rfid tag, plastic bottle and antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0584081B2 (en) | 1993-11-30 |
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Legal Events
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