JP2981087B2 - Beam antenna - Google Patents
Beam antennaInfo
- Publication number
- JP2981087B2 JP2981087B2 JP5191414A JP19141493A JP2981087B2 JP 2981087 B2 JP2981087 B2 JP 2981087B2 JP 5191414 A JP5191414 A JP 5191414A JP 19141493 A JP19141493 A JP 19141493A JP 2981087 B2 JP2981087 B2 JP 2981087B2
- Authority
- JP
- Japan
- Prior art keywords
- vertically polarized
- polarized radiation
- beam antenna
- elements
- radiation elements
- 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.)
- Expired - Lifetime
Links
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車電話あるいは携帯
電話などの移動無線方式における基地局アンテナに利用
する。特に二つの方向に指向性をもつビームアンテナに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a base station antenna in a mobile radio system such as an automobile telephone or a portable telephone. In particular, it relates to a beam antenna having directivity in two directions.
【０００２】本明細書では、地上で水平方向に異なる二
つの方向にビームを向けるような利用形態を想定して
「水平」、「垂直」という用語を使用するが、これはビ
ームを向ける方向に対する相対的な方向を意味し、実用
上の方向を限定するものではない。[0002] In this specification, the terms "horizontal" and "vertical" are used assuming a use form in which a beam is directed in two different directions in the horizontal direction on the ground. It means a relative direction and does not limit a practical direction.
【０００３】[0003]
【従来の技術】従来から、二つのアンテナ素子を位相差
９０°のハイブリッド回路により合成することにより、
二つの方向に指向性が得られることが知られている。図
２にそのような従来例ビームアンテナの斜視図を示す。2. Description of the Related Art Conventionally, by combining two antenna elements by a hybrid circuit having a phase difference of 90 °,
It is known that directivity can be obtained in two directions. FIG. 2 shows a perspective view of such a conventional beam antenna.
【０００４】図２に示したビームアンテナは、アンテナ
素子として二つの垂直偏波放射素子１、２が水平方向に
並んで配置され、その背面には背面反射板３が設けられ
る。背面反射板３の水平方向の両側には、この背面反射
板３と同一の金属板を折り曲げるか、または別の金属板
を接着した側面反射板４、５が設けられる。二つの垂直
偏波放射素子１、２は給電線６を介してハイブリッド回
路７に接続される。ハイブリッド回路７は二つの垂直偏
波放射素子１、２の送信または受信信号に９０°の位相
差を与えて合成し、二つの方向に指向性を得る。In the beam antenna shown in FIG. 2, two vertically polarized radiation elements 1 and 2 are arranged horizontally as antenna elements, and a back reflector 3 is provided on the back. On both sides of the rear reflector 3 in the horizontal direction, side reflectors 4 and 5 in which the same metal plate as the rear reflector 3 is bent or another metal plate is bonded are provided. The two vertically polarized radiation elements 1 and 2 are connected to a hybrid circuit 7 via a feed line 6. The hybrid circuit 7 combines the transmission or reception signals of the two vertically polarized radiation elements 1 and 2 by giving a phase difference of 90 ° to obtain directivity in two directions.
【０００５】図３は図２に示した従来例の動作を説明す
る平面図である。送信の場合について説明すると、二つ
の入出力端子８の一方に入力された信号は、ハイブリッ
ド回路７により９０°の位相差が与えられ、垂直偏波放
射素子１、２から放射される。このとき、二つの垂直偏
波放射素子１、２の放射した電磁波に干渉が生じ、ひと
つの素子を単体で用いたときの水平ビームよりも狭い幅
のビームが形成される。また、入出力端子８の他方に入
力された信号は、ハイブリッド回路７により逆の９０°
位相差が与えられ、別の方向に狭い幅のビームが形成さ
れる。したがって、異なる方向にビームを向けることが
できる。受信の場合にも同様であり、二つの方向に指向
性が得られる。FIG. 3 is a plan view for explaining the operation of the conventional example shown in FIG. Explaining the case of transmission, a signal input to one of the two input / output terminals 8 is given a 90 ° phase difference by the hybrid circuit 7 and is emitted from the vertically polarized radiation elements 1 and 2. At this time, interference occurs between the electromagnetic waves emitted by the two vertically polarized radiation elements 1 and 2, and a beam having a width narrower than the horizontal beam when one element is used alone is formed. The signal input to the other of the input / output terminals 8 is inverted by the hybrid circuit 7 by 90 °.
A phase difference is provided and a narrow beam is formed in another direction. Thus, the beams can be directed in different directions. The same applies to the case of reception, and directivity is obtained in two directions.
【０００６】このように、ひとつのアンテナで二つのビ
ームを形成できるので、基地局に設置するアンテナの本
数を半減させることができ、搭載重量を軽減できる。As described above, since two beams can be formed by one antenna, the number of antennas installed in the base station can be halved and the mounting weight can be reduced.
【０００７】[0007]
【発明が解決しようとする課題】しかし、従来例に示し
たビームアンテナでは、半値幅が６０°程度のビームを
発生させようとすると、主ビームと反対方向にサイドロ
ーブが発生する。このサイドローブのレベルは−１０ｄ
Ｂ程度であるため、目的のエリア以外に混信を与えてし
まう。However, in the beam antenna shown in the prior art, if it is attempted to generate a beam having a half width of about 60 °, side lobes are generated in the direction opposite to the main beam. The level of this side lobe is -10d
Since it is about B, interference occurs in areas other than the target area.
【０００８】一般に、素子間隔ｄが波長λに対してｄ≧
０．５λとなると、グレーティングサイドローブが大き
くなる。逆に、ｄ≦０．５λとすると、結合減衰量が小
さく（放射素子間の結合が大きく）なり、インピーダン
スの周波数特性が劣化する問題がある。In general, the element interval d is d ≧ d with respect to the wavelength λ.
At 0.5λ, the grating side lobe becomes large. Conversely, if d ≦ 0.5λ, there is a problem that the coupling attenuation is small (coupling between radiating elements is large) and the frequency characteristic of impedance is deteriorated.
【０００９】本発明は、このような課題を解決し、放射
素子間の間隔を広げることなく大きな素子間結合減衰量
を得ることのできる構造のビームアンテナを提供するこ
とを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a beam antenna having a structure capable of solving such a problem and obtaining a large amount of inter-element coupling attenuation without increasing the distance between radiating elements.
【００１０】[0010]
【課題を解決するための手段】本発明のビームアンテナ
は、二つの垂直偏波放射素子と、この二つの垂直偏波放
射素子の送信または受信信号に位相差を与えてビーム方
向を合成するハイブリッド回路とを備えたビームアンテ
ナにおいて、二つの垂直偏波放射素子は、水平方向に
０．３ないし０．４波長離れて配置され、さらに垂直方
向に０．４ないし０．５波長ずれて配置されたことを特
徴とする。SUMMARY OF THE INVENTION A beam antenna according to the present invention comprises two vertically polarized radiating elements and a hybrid which combines the beam directions by giving a phase difference to the transmission or reception signals of the two vertically polarized radiating elements. Circuit, the two vertically polarized radiating elements are arranged at a distance of 0.3 to 0.4 wavelength in the horizontal direction, and are further arranged at a distance of 0.4 to 0.5 wavelength in the vertical direction. It is characterized by having.
【００１１】ここで垂直偏波放射素子とは、実質的にひ
とつの直線方向の電磁波を送信または受信するアンテナ
素子であり、それが特定の方向に配置されたものをい
う。Here, the vertically polarized radiation element is an antenna element for transmitting or receiving an electromagnetic wave in substantially one linear direction, and refers to an element arranged in a specific direction.
【００１２】ハイブリッド回路により与えられる位相差
は一般には９０°である。[0012] The phase difference provided by the hybrid circuit is typically 90 °.
【００１３】二つの垂直偏波放射素子の背面に配置され
た背面反射板と、この背面反射板の水平方向の両側から
垂直偏波放射素子が設けられた側に突出する側面反射板
とを備え、側面反射板の背面反射板から突出する長さが
０．１ないし０．２波長に設定されることがよい。[0013] A back reflector disposed on the back of the two vertically polarized radiation elements, and side reflectors protruding from both sides in the horizontal direction of the rear reflector to the side on which the vertically polarized radiation elements are provided. The length of the side reflector protruding from the rear reflector may be set to 0.1 to 0.2 wavelength.
【００１４】このようなビームアンテナを垂直方向に複
数配置することができる。A plurality of such beam antennas can be arranged in the vertical direction.
【００１５】[0015]
【作用】垂直偏波放射素子を垂直方向にずらして配置す
ることにより、素子間の結合減衰量が大きくなる。した
がって、水平方向の素子間隔を小さくしてグレーティン
グサイドローブを抑え、それでいて、結合減衰量を大き
くしてインピーダンスの周波数特性を良好に保つことが
できる。By vertically disposing the vertically polarized radiation elements, the coupling attenuation between the elements is increased. Therefore, it is possible to suppress the grating side lobe by reducing the element spacing in the horizontal direction, and to maintain a good impedance frequency characteristic by increasing the coupling attenuation.
【００１６】[0016]
【実施例】図１は本発明第一実施例のビームアンテナを
示す斜視図である。FIG. 1 is a perspective view showing a beam antenna according to a first embodiment of the present invention.
【００１７】このビームアンテナは、二つの垂直偏波放
射素子１、２を備え、この二つの垂直偏波放射素子１、
２の送信または受信信号に位相差を与えてビーム方向を
合成するハイブリッド回路７を備える。垂直偏波放射素
子１、２は給電線６を介してハイブリッド回路７に接続
される。二つの垂直偏波放射素子１、２の背面には背面
反射板３が配置され、この背面反射板３の水平方向の両
側から垂直偏波放射素子１、２が設けられた側に突出す
る側面反射板４、５を備える。すなわち、背面反射板３
と側面反射板４、５とは「コ」の字形に配置され、この
「コ」の字の内側に垂直偏波放射素子１、２が配置され
る。側面反射板４、５の背面反射板３から突出する長
さ、すなわち幅ｗh はｗh ＝０．１〜０．２λである。
この側面反射板４、５により、水平方向に生じるサイド
ローブを抑えることができる。This beam antenna includes two vertically polarized radiation elements 1 and 2, and the two vertically polarized radiation elements 1 and 2
And a hybrid circuit 7 for giving a phase difference to the two transmission or reception signals to combine the beam directions. The vertically polarized radiation elements 1 and 2 are connected to a hybrid circuit 7 via a feed line 6. A rear reflector 3 is disposed on the back of the two vertically polarized radiation elements 1 and 2, and a side surface protruding from both sides in the horizontal direction of the rear reflector 3 to the side where the vertically polarized radiation elements 1 and 2 are provided. It has reflectors 4 and 5. That is, the back reflector 3
The side reflectors 4 and 5 are arranged in a “U” shape, and the vertically polarized radiation elements 1 and 2 are arranged inside the “U” shape. The length of the side reflectors 4 and 5 protruding from the rear reflector 3, that is, the width w h is w h = 0.1 to 0.2λ.
The side lobes 4 and 5 can suppress side lobes generated in the horizontal direction.
【００１８】ここで本実施例の特徴とするところは、二
つの垂直偏波放射素子１、２が、水平方向にｄ＝０．３
〜０．４λ離れて配置され、さらに垂直方向にｈ＝０．
４〜０．５λずれて配置されたことにある。The feature of this embodiment is that the two vertically polarized radiating elements 1 and 2 have d = 0.3 in the horizontal direction.
~ 0.4λ apart, and h = 0.
That is, they are arranged with a deviation of 4 to 0.5λ.
【００１９】ハイブリッド回路７により与えられる位相
差は通常は９０°であるが、位相器を調整して垂直偏波
放射素子１、２上の位相分布を調整することができる。Although the phase difference provided by the hybrid circuit 7 is usually 90 °, the phase distribution on the vertically polarized radiation elements 1 and 2 can be adjusted by adjusting the phase shifter.
【００２０】図４は本実施例の動作原理を説明する図で
あり、二つの垂直偏波放射素子を水平に並べた場合と垂
直に並べた場合の素子間隔に対する結合減衰量を示す。
この結合減衰量は、 Ｌcoup＝２０・ｌｏｇ〔２Ｒr ／｜Ｚm ｜〕 で表される。ここで、Ｒr は放射抵抗であり、Ｚm はイ
ンピーダンスである。図４に示したように、素子相互間
の結合減衰量は、垂直に並べた場合と水平に並べた場合
とでは垂直に配置した場合のほうが大きくなっている。
このことから、垂直偏波放射素子１、２を上述したよう
に配置することにより、大きな減衰量が得られ、好結果
が得られるものと考えられる。FIG. 4 is a diagram for explaining the principle of operation of the present embodiment, and shows the coupling attenuation with respect to the element spacing when two vertically polarized radiation elements are arranged horizontally and vertically.
This coupling attenuation is represented by L coup = 20 · log [2R r / | Z m |]. Here, R r is the radiation resistance and Z m is the impedance. As shown in FIG. 4, the coupling attenuation between the elements is larger in the case where they are arranged vertically and in the case where they are arranged horizontally than in the case where they are arranged vertically.
From this, it is considered that by arranging the vertically polarized radiation elements 1 and 2 as described above, a large amount of attenuation is obtained and a good result is obtained.
【００２１】図１に示した構造のビームアンテナを実際
に試作して素子間の結合減衰量と放射指向特性とについ
て測定した。これについて図５ないし図１１を参照して
説明する。A beam antenna having the structure shown in FIG. 1 was actually manufactured as a prototype, and the coupling attenuation between the elements and the radiation directivity were measured. This will be described with reference to FIGS.
【００２２】図５は実施例の具体的な構造を示し、図６
は比較例の構造を示す。また、図７は垂直偏波放射素子
１、２の詳しい構造を示す。垂直偏波放射素子１、２
は、縦ａ×横ｂ＝２００ｍｍ×８０ｍｍ、それぞれの中
心の水平間隔ｄ＝１２０ｍｍ、同じく垂直間隔ｈ＝１５
０ｍｍ（比較例の場合はｈ＝０）とし、背面反射板３の
幅Ｗ＝２５０ｍｍ、側面反射板４、５の幅ｗh ＝５０ｍ
ｍとした。垂直偏波放射素子１、２としては、３層構造
のマイクロストリップアンテナを用いた。その構造は、
縦ａ＝２００ｍｍ、横ｂ＝８０ｍｍの基板１１上に縦方
向の長さｃ＝９６ｍｍの金属薄膜１２を形成し、その金
属薄膜１２から高さｅ＝７ｍｍだけ浮かして縦方向の長
さｆ1 ＝ｆ2 ＝５６ｍｍの二つの金属板１３、１４をｇ
＝８ｍｍ離して設け、さらに基板１１から高さｉ＝４２
ｍｍだけ浮いた位置に縦ｋ＝１１４ｍｍ、横ｊ＝５０ｍ
ｍの金属板１５を配置したものである。金属板１３、１
４、１５は支柱により取り付けられ、金属薄膜１２およ
び金属板１３、１４、１５は空気中に保持されている。FIG. 5 shows a specific structure of the embodiment, and FIG.
Indicates the structure of the comparative example. FIG. 7 shows a detailed structure of the vertically polarized radiation elements 1 and 2. Vertically polarized radiation elements 1, 2
Is vertical a × b = 200 mm × 80 mm, horizontal distance d at each center is 120 mm, and vertical distance h is 15
0 mm (h = 0 in the case of the comparative example), the width W of the rear reflector 3 is 250 mm, and the width w h of the side reflectors 4 and 5 is 50 m.
m. As the vertically polarized radiation elements 1 and 2, a microstrip antenna having a three-layer structure was used. Its structure is
A metal thin film 12 having a vertical length c = 96 mm is formed on a substrate 11 having a vertical length a = 200 mm and a horizontal width b = 80 mm. The metal thin film 12 is floated from the metal thin film 12 by a height e = 7 mm to have a vertical length f 1. = F 2 = 56 mm for two metal plates 13 and 14
= 8 mm apart, and height i = 42 from the substrate 11
mm = 114 mm, width j = 50 m
m metal plates 15 are arranged. Metal plate 13, 1
Reference numerals 4 and 15 are attached by columns, and the metal thin film 12 and the metal plates 13, 14, and 15 are held in the air.
【００２３】図８、図９は図５に示した構造による測定
結果を示し、図１０、図１１は図６に示した比較例によ
る測定結果を示す。図８、図１０は垂直偏波放射素子間
の結合減衰量を示し、図９、図１１は９００ＭＨｚにお
ける放射指向特性を示す。図９、図１１において、実線
が垂直偏波の特性を示し、一点鎖線は水平偏波の特性を
示す。これらの図から、実施例の場合には、いくつかの
周波数において大きな結合減衰量が得られ、サイドロー
ブレベルが−２０ｄＢ程度と小さくなることがわかる。FIGS. 8 and 9 show the measurement results by the structure shown in FIG. 5, and FIGS. 10 and 11 show the measurement results by the comparative example shown in FIG. 8 and 10 show the coupling attenuation between vertically polarized radiating elements, and FIGS. 9 and 11 show the radiation directivity characteristics at 900 MHz. 9 and 11, the solid line indicates the characteristic of vertical polarization, and the dashed line indicates the characteristic of horizontal polarization. From these figures, it can be seen that in the case of the embodiment, a large coupling attenuation is obtained at some frequencies, and the side lobe level is reduced to about −20 dB.
【００２４】ここではマイクロストリップアンテナを用
いた例を示したが、ダイポールアンテナを用いた場合に
も同様の結果が得られた。Although an example using a microstrip antenna is shown here, similar results were obtained when a dipole antenna was used.
【００２５】図１２は本発明第二実施例のビームアンテ
ナを示す図である。垂直偏波放射素子および反射板の構
造を斜視図で示す。この実施例は、第一実施例に示した
ビームアンテナを垂直方向に複数配置したことを特徴と
する。すなわち、二個一組の垂直偏波放射素子１、２を
複数組備え、その組ごとにハイブリッド回路７が設けら
れる。これらのハイブリッド回路７にはそれぞれ位相器
９が接続され、垂直偏波放射素子１、２の上の位相分布
を調整することができる。FIG. 12 is a view showing a beam antenna according to the second embodiment of the present invention. FIG. 2 is a perspective view showing the structure of a vertically polarized radiation element and a reflector. This embodiment is characterized in that a plurality of beam antennas shown in the first embodiment are arranged in the vertical direction. That is, a plurality of pairs of vertically polarized radiation elements 1 and 2 are provided, and a hybrid circuit 7 is provided for each pair. A phase shifter 9 is connected to each of these hybrid circuits 7 so that the phase distribution on the vertically polarized radiation elements 1 and 2 can be adjusted.
【００２６】[0026]
【発明の効果】以上説明したように、本発明のビームア
ンテナは、水平方向の素子間隔を小さくしてグレーティ
ングサイドローブを抑えることができ、それでいて、放
射素子間の結合減衰量を大きくしてインピーダンスの周
波数特性を良好に保つことができる効果がある。As described above, the beam antenna according to the present invention can reduce the grating side lobe by reducing the horizontal element spacing, and increase the coupling attenuation between radiating elements to increase the impedance. This has the effect that the frequency characteristics of can be kept good.
【図１】本発明第一実施例のビームアンテナの構造を示
す斜視図。FIG. 1 is a perspective view showing the structure of a beam antenna according to a first embodiment of the present invention.
【図２】従来例のビームアンテナを示す斜視図。FIG. 2 is a perspective view showing a conventional beam antenna.
【図３】従来例の動作を説明する平面図。FIG. 3 is a plan view illustrating an operation of a conventional example.
【図４】実施例の動作原理を説明する図。FIG. 4 is a diagram illustrating the operation principle of the embodiment.
【図５】実施例の具体的な構造を示す斜視図。FIG. 5 is a perspective view showing a specific structure of the embodiment.
【図６】比較例の構造を示す斜視図。FIG. 6 is a perspective view showing the structure of a comparative example.
【図７】垂直偏波放射素子の構造を示す斜視図。FIG. 7 is a perspective view showing the structure of a vertically polarized radiation element.
【図８】実施例における垂直偏波放射素子間の結合減衰
量を示す図。FIG. 8 is a diagram showing the coupling attenuation between vertically polarized radiation elements in the example.
【図９】実施例における９００ＭＨｚの放射指向特性を
示す図。FIG. 9 is a diagram showing a radiation directivity characteristic at 900 MHz in the example.
【図１０】比較例における垂直偏波放射素子間の結合減
衰量を示す図。FIG. 10 is a diagram showing a coupling attenuation between vertically polarized radiation elements in a comparative example.
【図１１】比較例における９００ＭＨｚの放射指向特性
を示す図。FIG. 11 is a diagram showing a radiation directivity characteristic at 900 MHz in a comparative example.
【図１２】本発明第二実施例のビームアンテナの構造を
示す斜視図。FIG. 12 is a perspective view showing the structure of a beam antenna according to a second embodiment of the present invention.
１、２ 垂直偏波放射素子 ３ 背面反射板 ４、５ 側面反射板 ６ 給電線 ７ ハイブリッド回路 ８ 入出力端子 ９ 位相器 １１ 基板 １２ 金属薄膜 １３、１４、１５ 金属板 DESCRIPTION OF SYMBOLS 1, 2 Vertically polarized radiation element 3 Back reflector 4, 5 Side reflector 6 Feeding line 7 Hybrid circuit 8 Input / output terminal 9 Phaser 11 Substrate 12 Metal thin film 13, 14, 15 Metal plate
Claims (4)
相差を与えてビーム方向を合成するハイブリッド回路と
を備えたビームアンテナにおいて、 上記二つの垂直偏波放射素子は、水平方向に０．３ない
し０．４波長離れて配置され、さらに垂直方向に０．４
ないし０．５波長ずれて配置されたことを特徴とするビ
ームアンテナ。1. A beam antenna comprising: two vertically polarized radiation elements; and a hybrid circuit for synthesizing a beam direction by giving a phase difference to transmission or reception signals of the two vertically polarized radiation elements. The two vertically polarized radiating elements are arranged 0.3 to 0.4 wavelengths apart in the horizontal direction, and 0.4
A beam antenna, wherein the beam antenna is arranged to be shifted by 0.5 wavelength.
位相差は９０°である請求項１記載のビームアンテナ。2. The beam antenna according to claim 1, wherein a phase difference provided by said hybrid circuit is 90 °.
置された背面反射板と、 この背面反射板の水平方向の両側から上記垂直偏波放射
素子が設けられた側に突出する側面反射板とを備え、 上記側面反射板の上記背面反射板から突出する長さが
０．１ないし０．２波長に設定された請求項１または２
記載のビームアンテナ。3. A back reflector disposed on the back of the two vertically polarized radiation elements, and a side reflection projecting from both sides in the horizontal direction of the back reflector to a side on which the vertically polarized radiation element is provided. And a length of the side reflector protruding from the rear reflector is set to 0.1 to 0.2 wavelength.
The described beam antenna.
ムアンテナが垂直方向に複数配置されたことを特徴とす
るアンテナ装置。4. An antenna device comprising a plurality of the beam antennas according to claim 1 arranged in a vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5191414A JP2981087B2 (en) | 1993-08-02 | 1993-08-02 | Beam antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5191414A JP2981087B2 (en) | 1993-08-02 | 1993-08-02 | Beam antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0746036A JPH0746036A (en) | 1995-02-14 |
| JP2981087B2 true JP2981087B2 (en) | 1999-11-22 |
Family
ID=16274220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5191414A Expired - Lifetime JP2981087B2 (en) | 1993-08-02 | 1993-08-02 | Beam antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2981087B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6809694B2 (en) * | 2002-09-26 | 2004-10-26 | Andrew Corporation | Adjustable beamwidth and azimuth scanning antenna with dipole elements |
| JP2008047964A (en) * | 2006-08-10 | 2008-02-28 | Docomo Technology Inc | Antenna device |
| KR101218702B1 (en) * | 2012-01-06 | 2013-01-04 | 남창기 | RF module for multi-mode |
-
1993
- 1993-08-02 JP JP5191414A patent/JP2981087B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0746036A (en) | 1995-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100624049B1 (en) | Square Lattice Horn Array Antenna for Circularly Polarized Reception | |
| US6798384B2 (en) | Multi-element planar array antenna | |
| US4772890A (en) | Multi-band planar antenna array | |
| US20010050654A1 (en) | Printed circuit board-configured dipole array having matched impedance-coupled microstrip feed and parasitic elements for reducing sidelobes | |
| US6052098A (en) | Printed circuit board-configured dipole array having matched impedance-coupled microstrip feed and parasitic elements for reducing sidelobes | |
| JP3623714B2 (en) | Broadband antenna and array antenna device | |
| JP3761988B2 (en) | Antenna device | |
| KR101901101B1 (en) | Print type dipole antenna and electric device using the same | |
| JPH05308223A (en) | Two-frequency common use antenna | |
| CN113659325A (en) | Integrated substrate gap waveguide array antenna | |
| JP3782278B2 (en) | Beam width control method of dual-polarized antenna | |
| JP2981087B2 (en) | Beam antenna | |
| KR100703932B1 (en) | Repeater antenna for cancelling side lobe interference by dummy patch array | |
| JPH06237119A (en) | Shared plane antenna for polarized waves | |
| JP3304019B2 (en) | ARRAY ANTENNA, RECEIVER HAVING THE SAME, AND METHOD OF DETERMINING DIRECTIVITY CHARACTERISTICS IN ARRAY ANTENNA | |
| JP2645700B2 (en) | Dual frequency corner antenna device | |
| KR100517291B1 (en) | Planar microstrip array antenna | |
| WO2020253938A1 (en) | Continuous beam steering antenna structure | |
| JPH07142927A (en) | Antenna device | |
| JP2002217639A (en) | Phased array antenna and transmitter/receiver using the same | |
| JP3701578B2 (en) | Horizontal and vertical polarization antenna device | |
| RU2807027C1 (en) | Multi-beam feed-through antenna array | |
| JP2003078339A (en) | Antenna shared by horizontal and vertical polarizations | |
| JP2004032392A (en) | Polarized wave diversity dipole antenna | |
| JPH09121116A (en) | Planar antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080917 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080917 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090917 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090917 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100917 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110917 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120917 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 14 |
|
| EXPY | Cancellation because of completion of term |