JP2742210B2 - Bidirectional directional microstrip antenna - Google Patents
Bidirectional directional microstrip antennaInfo
- Publication number
- JP2742210B2 JP2742210B2 JP6054738A JP5473894A JP2742210B2 JP 2742210 B2 JP2742210 B2 JP 2742210B2 JP 6054738 A JP6054738 A JP 6054738A JP 5473894 A JP5473894 A JP 5473894A JP 2742210 B2 JP2742210 B2 JP 2742210B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric plate
- excitation
- metal film
- plate
- power supply
- 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 - Fee Related
Links
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、陸上における移動通信
方式に好適な双方向指向性マイクロストリップアンテナ
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bidirectional directional microstrip antenna suitable for a land-based mobile communication system.
【０００２】[0002]
【従来の技術】携帯電話に代表される移動通信方式は、
加入者の急増に伴って、従来のように、高いビルの屋上
等に基地局アンテナを設置し、比較的広い地域を無線ゾ
−ンとする代わりに、例えば一つの広場、一区間の道
路、一つの部屋又は一つの廊下等のように、狭い地域を
それぞれ一つの独立した無線ゾ−ンとすると共に、同一
周波数を繰り返し使用することによって、限られた割り
当て周波数の範囲内で加入者の急増に対処しようとして
いる。そして、この場合に用いられる基地局アンテナと
しては、無線ゾ−ンに対応した指向性を有する必要があ
る。例えば一区間の道路、一つの廊下又は地下街等のよ
うに細長い無線ゾ−ンを想定する場合、無線ゾ−ンの中
央に基地局アンテナを設置し、その前後に、即ち、無線
ゾ−ンの長手方向に沿ってビ−ムを前方及び後方に放射
する双方向指向性を持たせる必要がある。このような指
向性を有するアンテナとして、従来は図６に示すような
アンテナが用いられている。図６において、111 及び11
2 は誘電体基板で、両基板の各一面全域に金属皮膜を被
着させてグランド面に形成し、両グランド面を向き合わ
せると共に、互いに適宜間隔を隔てて誘電体基板111 及
び112 をほぼ平行となるように対向させて設けてある。
誘電体基板111 及び112 の各他面、即ち、図６におい
て、誘電体基板111 の前面に金属皮膜より成る励振素子
121 を設け、誘電体基板112 の背面に金属皮膜より成る
励振素子122 を設けてある。131 及び132 は同軸給電ケ
−ブル、14は合成器、６は入出力端子である。入出力端
子６への入力信号は合成器14で２等分され、同軸給電ケ
−ブル131 及び132 を経てマイクロストリップアンテナ
を形成する励振素子121 及び122 を等振幅で励振する。
このアンテナを構成する２個のマイクロストリップアン
テナは、互いに背中合わせに配置されているから電波は
互いに反対の２方向に放射される。即ち、このアンテナ
は、前後の２方向に指向性を有するので、細長い道路又
は地下街等より成る無線ゾ−ンに設置するのに好適であ
る。2. Description of the Related Art A mobile communication system typified by a mobile phone is:
With the rapid increase of subscribers, instead of installing a base station antenna on the roof of a tall building as in the past and using a relatively large area as a wireless zone, for example, one square, one section of road, A small area, such as one room or one corridor, is made into one independent radio zone, and the same frequency is repeatedly used to increase the number of subscribers within a limited allocated frequency range. Trying to deal with. The base station antenna used in this case needs to have directivity corresponding to the radio zone. For example, when assuming an elongated wireless zone such as a section of road, a single corridor or an underground mall, a base station antenna is installed in the center of the wireless zone, and before and after that, that is, in the wireless zone. It is necessary to have bidirectional directivity for radiating the beam forward and backward along the longitudinal direction. As an antenna having such directivity, an antenna as shown in FIG. 6 is conventionally used. In FIG. 6, 11 1 and 11
Reference numeral 2 denotes a dielectric substrate, which is formed on the ground surface by coating a metal film on the entire surface of each substrate, facing the ground surfaces, and separating the dielectric substrates 11 1 and 11 2 at appropriate intervals from each other. They are provided facing each other so as to be substantially parallel.
Each other surface of the dielectric substrate 11 1 and 11 2, i.e., in FIG. 6, made of a metal film on the front surface of the dielectric substrate 11 first excitation element
12 1 provided, it is provided with excitation element 12 2 formed of a metal film on the rear surface of the dielectric substrate 11 2. 13 1 and 13 2 are coaxial feed Ke - Bull, 14 combiner, 6 is an input-output terminal. The input signal to the output terminal 6 is bisected by the synthesizer 14, coaxial feed Ke - excited with equal amplitude excitation element 12 1 and 12 2 forming the micro-strip antenna through the table 13 1 and 13 2.
Since the two microstrip antennas constituting this antenna are arranged back to back, radio waves are radiated in two opposite directions. That is, since this antenna has directivity in the front and rear two directions, it is suitable for being installed in a wireless zone composed of an elongated road or an underground mall.
【０００３】図７もまた従来のアンテナを示す図で、11
1 及び112 は誘電体基板で、各一面をグランド面に形成
し、各他面に励振素子121 及び122 を設けてそれぞれマ
イクロストリップアンテナを構成させ、図６に示したア
ンテナと同様、上記マイクロストリップアンテナが互い
に背中合わせとなるように配置してある。131 及び132
は同軸給電ケ−ブル、14は合成器、６は入出力端子で、
これらもまた図６に示したものと同様の構成部品であ
る。171 は誘電体基板111 の前方に設けた誘電体基板
で、その板面に無給電素子181 を設けてある。172 は誘
電体基板112 の前方（励振素子122 の放射方向に対し
て）に設けた誘電体基板で、その板面に無給電素子182
を設けてある。このアンテナは、無給電素子181 及び18
2 を設けることによって、放射周波数特性を図６に示し
たアンテナに比し広帯域にしたものであるが、アンテナ
としての基本動作及び双方向指向性は図６に示したアン
テナと全く同様である。図８は、図７に示した従来のア
ンテナにおける双方向指向性の測定結果を示すもので、
横軸は水平面内の角度（°）、縦軸は相対電界強度(dB)
である。図から明らかなように、このアンテナは、＋90
°と−90°の２方向に指向性のピ−クを有する。FIG. 7 also shows a conventional antenna.
1 and 11 2 in the dielectric substrate, each one surface is formed on the ground surface, the excitation element 12 1 and 12 2 to constitute a microstrip antenna respectively provided on each other surface, similar to the antenna shown in FIG. 6, The microstrip antennas are arranged back to back. 13 1 and 13 2
Is a coaxial feed cable, 14 is a combiner, 6 is an input / output terminal,
These are also components similar to those shown in FIG. 17 1 is a dielectric substrate provided on the front of the dielectric substrate 11 1, are the parasitic elements 18 1 provided on the plate surface. 17 2 dielectric substrate 11 with a dielectric substrate provided on the second front (with respect to the radial direction of the excitation element 12 2), that the plate surface parasitic element 18 2
Is provided. This antenna is composed of parasitic elements 18 1 and 18
By providing 2 , the radiation frequency characteristic is made wider than that of the antenna shown in FIG. 6, but the basic operation and bidirectional directivity of the antenna are exactly the same as those of the antenna shown in FIG. FIG. 8 shows a measurement result of the bidirectional directivity of the conventional antenna shown in FIG.
The horizontal axis is the angle in the horizontal plane (°), and the vertical axis is the relative electric field strength (dB).
It is. As is evident from the figure, this antenna has +90
It has directivity peaks in two directions, that is, ° and -90 °.
【０００４】[0004]
【発明が解決しようとする課題】図６及び図７に示した
従来のアンテナは、何れもアンテナの前後両方向に指向
性を有するから、指向性の面においては細長い通路又は
地下街等の基地局アンテナとして好適である。然しなが
ら、これら従来のアンテナは、無給電素子181 及び182
を設けるための誘電体基板171 及び172 は別にして、２
枚の誘電体基板111 及び112 、２本の同軸給電ケ−ブル
131 及び132 、合成器14を必要とするから構成部品点数
が多く、製作工程も多い等、実用に供するには、経済性
の点で改良すべき余地が残されている。又、アンテナ全
体の占有体積が大きいために、様々な設置環境条件に対
して、アンテナの設置自由度が制限される等の問題があ
る。The conventional antennas shown in FIGS. 6 and 7 both have directivity in both front and rear directions of the antenna. Therefore, in terms of directivity, a base station antenna such as an elongated passage or an underground mall is required. It is suitable as. However, these conventional antennas have parasitic elements 18 1 and 18 2
Apart from the dielectric substrates 17 1 and 17 2 for providing
Dielectric substrates 11 1 and 11 2 , two coaxial feed cables
Since the components 13 1 and 13 2 and the synthesizer 14 are required, the number of component parts is large and the number of manufacturing steps is large. Thus, there is still room for improvement in terms of economic efficiency for practical use. Further, since the occupied volume of the entire antenna is large, there is a problem that the degree of freedom of installation of the antenna is limited under various installation environment conditions.
【０００５】[0005]
【課題を解決するための手段】本発明は、放射波長に比
し薄い誘電体板の表面に各被着させた金属皮膜より成る
励振素子及びこの励振素子に接続される給電線と、誘電
体板の裏面に各被着させた金属皮膜より成る励振素子及
びこの励振素子に接続される給電線が、誘電体板の表面
と裏面との中間面を鏡映面として鏡映対称となるように
形成した双方向指向性マイクロストリップアンテナを実
現することによって、従来のアンテナの欠点を除こうと
するものである。SUMMARY OF THE INVENTION The present invention provides an exciting element comprising a metal film deposited on the surface of a dielectric plate thinner than the radiation wavelength, a feed line connected to the exciting element, and a dielectric material. An excitation element made of a metal film adhered to the back surface of the plate and a feeder line connected to the excitation element are mirror-symmetrical with an intermediate plane between the front surface and the back surface of the dielectric plate as a mirror plane. It is an attempt to eliminate the drawbacks of conventional antennas by realizing a formed bidirectional directional microstrip antenna.
【０００６】[0006]
【作用】本発明アンテナにおいては、誘電体板の表面に
設けた励振素子及び給電線と誘電体板の裏面に設けた励
振素子及び給電線が、誘電体板の表面と裏面との中間面
を鏡映面として鏡映対称となるように形成してあるか
ら、給電線に加えられた高周波電力によって、誘電体板
の表面に設けた励振素子及び誘電体板の裏面に設けた励
振素子が共に励振され、誘電体板の前方及び後方の２方
向に電波を放射する。In the antenna according to the present invention, the excitation element and the feed line provided on the front surface of the dielectric plate and the excitation element and the feed line provided on the back surface of the dielectric plate form an intermediate plane between the front surface and the back surface of the dielectric plate. Since the mirror surface is formed so as to be mirror-symmetrical, both the excitation element provided on the front surface of the dielectric plate and the excitation device provided on the back surface of the dielectric plate are caused by the high-frequency power applied to the feeder line. It is excited and emits radio waves in two directions, forward and backward of the dielectric plate.
【０００７】[0007]
【実施例】図１（ａ）は、本発明の一実施例を示す斜視
図、即ち、本発明アンテナを斜め前方から見た図、図１
（ｂ）は、本発明アンテナを斜め後方から見た図で、１
は放射波長に比し薄い誘電体板、21は第１の励振素子、
31は第１の給電線、４は整合線路で、これらは誘電体板
１の表面に設けてある。22は第２の励振素子、32は第２
の給電線、５はグランド面で、これらは誘電体板１の裏
面に設けてある。 ６は入出力端子で、例えば同軸接栓
より成り、その内部導体を整合線路４に接続し、外部導
体をグランド面５に接続してある。尚、第１の励振素子
21と第１の給電線31との間及び第１の給電線31と整合線
路４との間を電気的に接続すると共に、第２の励振素子
22と第２の給電線32との間及び第２の給電線32とグラン
ド面５との間を電気的に接続してある。誘電体板１を例
えばガラス布基材フッ素樹脂銅張積層板を用いて形成す
る場合には、印刷手法と同様の手法によって不要の金属
皮膜を除去して誘電体板１の表裏面に第１の励振素子
21、第１の給電線31、整合線路４、第２の励振素子22、
第２の給電線32及びグランド面５を被着形成する。誘電
体板１として単なる誘電体板を用いる場合には、その表
裏面に蒸着等の手段によって銅等の皮膜を被着させるこ
とによって第１の励振素子21、第１の給電線31、整合線
路４、第２の励振素子22、第２の給電線32及びグランド
面５を形成する。これらの製作手法は、後述する本発明
の他の実施例においても同様である。そして本発明アン
テナにおいては、誘電体板１の表面に設けた第１の励振
素子21及び第１の給電線31と誘電体板１の裏面に設けた
第２の励振素子22及び第２の給電線32が、誘電体板１の
表面と裏面との中間において表面又は裏面と平行となる
面を鏡映面（対称面）として鏡映対称（面対称）となる
ように形成してある。FIG. 1A is a perspective view showing an embodiment of the present invention, that is, a view of the antenna of the present invention viewed obliquely from the front.
(B) is a diagram of the antenna of the present invention as viewed obliquely from the rear.
Thin dielectric plate, the 2 1 first excitation element relative to the radiation wavelength,
3 1 The first feed line, 4 is a matching line, they are provided on the surface of the dielectric plate 1. 2 2 is the second excitation element, 3 2 is the second excitation element
Are the ground planes, which are provided on the back surface of the dielectric plate 1. Reference numeral 6 denotes an input / output terminal, which is made of, for example, a coaxial plug, and has an inner conductor connected to the matching line 4 and an outer conductor connected to the ground plane 5. In addition, the first excitation element
2 1 with an electrical connection between the first power supply line 3 1 and between the first power supply line 3 1 and the matching line 4, the second excitation element
2 2 and are electrically connected to and between the second power supply line 3 2 and the ground surface 5 and the second feeder line 3 2. When the dielectric plate 1 is formed using, for example, a glass cloth base fluororesin copper-clad laminate, an unnecessary metal film is removed by a method similar to the printing method, and the first and second surfaces of the dielectric plate 1 are formed on the front and back surfaces of the dielectric plate 1. Exciting element
2 1, the first feed line 3 1, matching line 4, the second excitation element 2 2,
A second power supply line 3 2 and the ground plane 5 deposited form. When using a mere dielectric plate as a dielectric plate 1, the table first excitation element 2 1 by depositing a film of copper or the like by means such as vapor deposition on the back surface, a first feed line 3 1, matching line 4, the second excitation element 2 2, to form the second feeder line 3 2 and the ground plane 5. These manufacturing methods are the same in other embodiments of the present invention described later. And in the present invention an antenna, a first excitation element 2 1 and the first power supply line 3 1 and the second provided on the back surface of the dielectric plate 1 driven element 2 2 and the provided on the surface of the dielectric plate 1 2 feed line 3 2, formed so as to be mirror-symmetrical (plane symmetrical) a surface parallel to the surface or back surface in the middle between the front and back surfaces of the dielectric plate 1 as mirror-surface (plane of symmetry) It is.
【０００８】このように、本発明アンテナにおいては、
誘電体板１の表面に設けた第１の励振素子21及び第１の
給電線31と誘電体板１の裏面に設けた第２の励振素子22
及び第２の給電線32が、誘電体板１の表面と裏面との中
間において表面又は裏面と平行となる面を鏡映面（対称
面）として鏡映対称（面対称）となるように形成してあ
るから、同軸接栓６に加えられた高周波電力は、整合線
路４及びグランド面５より成るマイクロストリップ線路
を伝送すると共に、第１及び第２の給電線31及び32、整
合線路４及びグランド面５より成る平衡−不平衡変換回
路で姿態変換が行われ、第１及び第２の給電線31及び32
より成る給電回路を介して第１及び第２の励振素子21及
び22を等振幅で励振し、誘電体板１の前方及び後方の２
方向に電波を放射する。尚、入出力端子６を含めて本発
明アンテナと送信機間を平衡型伝送線路で接続する場合
には、平衡−不平衡変換回路の構成素子である整合線路
４及びグランド面５を省くこと勿論である。As described above, in the antenna of the present invention,
The provided on the surface of the dielectric plate 1 1 of the excitation element 2 1 and the first power supply line 3 1 and a second excitation element provided on the back surface of the dielectric plate 1 2 2
And second power feeding line 3 2, so as to be mirror-symmetrical (plane symmetrical) a surface parallel to the surface or back surface in the middle between the front and back surfaces of the dielectric plate 1 as mirror-surface (plane of symmetry) since is formed, the high-frequency power applied to the coaxial connector 6 is configured to transmit microstrip line consisting of matching line 4 and the ground plane 5, the first and second feeding lines 3 1 and 3 2, matching line 4, and the ground plane 5 than consists equilibrium - figure conversion is performed by unbalanced conversion circuit, the first and second feeding lines 3 1 and 3 2
The first and second excitation elements 2 1 and 2 2 and excited with equal amplitude through a more composed feeder circuit, 2 front and rear of the dielectric plate 1
Emit radio waves in the direction. When the antenna of the present invention and the transmitter including the input / output terminal 6 are connected by a balanced transmission line, the matching line 4 and the ground plane 5, which are the components of the balanced-unbalanced conversion circuit, are omitted. It is.
【０００９】図２は、本発明の他の実施例を示す斜視図
で、１は第１の誘電体板で、図には現われていないが、
図１に示したものと同様の第１の励振素子21、第１の給
電線31及び整合線路４を表面に設け、裏面に第２の励振
素子22、第２の給電線32及びグランド面５を設け、下縁
に入出力端子６を取り付けてある。そしてこの実施例に
おいても図１に示したアンテナと同様に、第１の誘電体
板１の表面に設けた第１の励振素子21及び第１の給電線
31と第１の誘電体板１の裏面に設けた第２の励振素子22
及び第２の給電線32が、第１の誘電体板１の表面と裏面
との中間において表面又は裏面と平行となる面を鏡映面
（対称面）として鏡映対称（面対称）となるように形成
してある。71は放射波長に比し薄い第２の誘電体板で、
第１の誘電体板１の前方に、放射波長より小なる間隔を
隔てて設けてある。81は第１の無給電素子で、第２の誘
電体板71の表面又は裏面に設けてある。第２の誘電体板
71に第１の無給電素子81を設ける手法は、第１の誘電体
板１に第１の励振素子21等を設ける手法を用いることが
でき、又、第１の無給電素子81を銅等の金属板で形成し
て、第２の誘電体板71を省いてもよい。図には示してい
ないが、第１の誘電体板１と第２の誘電体板71とを一体
に結合するために、両誘電体板の４隅又は周縁間に絶縁
スペ−サを介在させてこれらを一体に固着し、或は、第
１の誘電体板１に設けた励振素子21と第２の誘電体板71
に設けた第１の無給電素子81の各中心が一致するように
形成されている場合には、両中心（電位差を生ずるおそ
れのない箇所）をビス及びナットを用いて結合するよう
に形成してもよい。第１の無給電素子81を金属板で形成
した場合にも、第１の誘電体板１に設けた励振素子21と
第１の無給電素子81の各中心が一致するように形成され
ている場合には、両中心をビス及びナットを用いて結合
し、両中心が一致はしないが、第１の無給電素子81の面
積が第１の励振素子21の面積に比し大で、第１の無給電
素子81の周縁が第１の励振素子21の周縁の外側にあるよ
うな場合には、例えば筒状の絶縁体の尖端部を第１の無
給電素子81の周縁に固着し、筒状の絶縁体の後端部を第
１の励振素子21の周縁の外側における第１の誘電体板１
の表面に固定するようにしてもよい。72は第３の誘電体
板で、図には現われていないが、第３の誘電体板72の表
面又は裏面に第２の無給電素子を設けてある。第２の無
給電素子の形成手法、第１及び第３の誘電体板１及び72
の間隔、両板の結合方法、第２の無給電素子を金属板で
形成した場合における第１の誘電体板１と第２の無給電
素子との結合方法等は、第１の無給電素子81の形成手
法、第１及び第２の誘電体板１及び71の間隔、両板の結
合方法、第１の無給電素子81を金属板で形成した場合に
おける第１の誘電体板１と第１の無給電素子81との結合
方法等と全く同様である。この実施例におけるアンテナ
は、励振素子21及び22の各前面に無給電素子81及び8
2（82は図には現われていない）を設けることによって
放射周波数特性の広帯域化を図った点において図１に示
したアンテナと異なるのみで、アンテナとしての基本動
作は図１に示したアンテナと全く同様である。図３は、
図２に示した本発明アンテナの放射指向性を実測値に基
づいて示すもので、横軸は水平面内の角度（°）、縦軸
は相対電界強度(dB)で、図示のように＋90°及び−90°
の２方向に指向性のピ−クを有する。FIG. 2 is a perspective view showing another embodiment of the present invention. Reference numeral 1 denotes a first dielectric plate, which is not shown in FIG.
First excitation element 2 1 similar to that shown in FIG. 1, a first feed line 3 1 and the matching line 4 provided on the surface, a second excitation element 2 2 on the back side, a second feed line 3 2 And a ground plane 5, and an input / output terminal 6 is attached to the lower edge. And similar to the antenna shown in FIG. 1 also in this embodiment, the first excitation element 2 1 and a first feed line provided on the first dielectric plate 1 in the surface
3 1 and second excitation element 2 2 provided on the back surface of first dielectric plate 1
And second power feeding line 3 2, symmetrical mirrored surface or the back surface and a plane parallel in the middle between the first surface and the back surface of the dielectric plate 1 as mirror-surface (plane of symmetry) (plane of symmetry) It is formed so that it becomes. 7 1 is a second dielectric plate thinner than the emission wavelength,
The first dielectric plate 1 is provided in front of the first dielectric plate 1 with an interval smaller than the radiation wavelength. 8 1 a first parasitic element, is provided on the front or back surface of the second dielectric plate 71. Second dielectric plate
7 approach the first providing the parasitic element 8 1 in 1 can be used a method of the first dielectric plate 1 providing a first excitation element 2 1, etc., also, the first parasitic element 8 form 1 of a metal plate such as copper, may be omitted second dielectric plate 71. Although not shown, a first dielectric plate 1 and the second dielectric plate 71 in order to bind together, an insulating space between the four corners or the peripheral edge of both the dielectric plate - intervening Sa Then, these are integrally fixed, or the excitation element 21 provided on the first dielectric plate 1 and the second dielectric plate 7 1
When the centers of the first parasitic elements 81 provided in the above are formed so as to coincide with each other, both centers (locations where there is no possibility of generating a potential difference) are formed using screws and nuts. May be. Even when the first parasitic elements 8 1 formed of a metal plate, formed as a driven element 2 1 provided in the first dielectric plate 1 first the center of the parasitic element 81 are matched and if it is, both the center and coupled using screws and nuts, but both centers are not matched, the first area of the parasitic element 81 is compared to the first area of the excitation element 2 1 large, when the first peripheral edge of the parasitic element 81 is such that the outer side of the first excitation element 2 1 peripheral edge, for example the tip of the cylindrical insulator first parasitic elements 8 1 and the rear end of the cylindrical insulator is connected to the first dielectric plate 1 outside the periphery of the first excitation element 21.
You may make it fix to the surface of. 7 2 in the third dielectric plate, although not shown in the figure, are the second parasitic element is provided on the third surface or the back surface of the dielectric plate 7 2. Method of forming the second parasitic elements, the first and third dielectric plate 1 and 7 2
, The method of coupling the two plates, the method of coupling the first dielectric plate 1 and the second parasitic element when the second parasitic element is formed of a metal plate, etc. 8 1 of forming techniques, the first and second dielectric plates 1 and 7 1 intervals, coupling methods both plates, the first dielectric plate in the case where the first parasitic elements 8 1 formed of a metal plate The method for coupling the first parasitic element 81 to the first parasitic element 81 is completely the same. Antenna in this embodiment, excitation elements 2 1 and 2 the parasitic element 81 to the respective front face 2 and 8
2 (8 2 does not appear in the drawing) different from the antenna shown in FIG. 1 in that tried to broaden the emission frequency characteristics only by providing the antenna is the basic operation of the antenna shown in FIG. 1 Is exactly the same as FIG.
The radiation directivity of the antenna of the present invention shown in FIG. 2 is shown on the basis of the actually measured values. The horizontal axis is the angle (°) in the horizontal plane, and the vertical axis is the relative electric field strength (dB). And -90 °
Directional peaks in two directions.
【００１０】図４（ａ）は、本発明の他の実施例を示す
斜視図、即ち、本発明アンテナを斜め前方から見た図、
図４（ｂ）は、本発明アンテナを斜め後方から見た図
で、１は誘電体板、21及び23は励振素子、31及び33は給
電線、４は整合線路、22及び24は励振素子、32及び34は
給電線、５はグランド面、６は入出力端子で、誘電体板
１の材質、励振素子21ないし24、給電線31ないし34、整
合線路４及びグランド面５の形成手法等は、図１に示し
た誘電体板１の材質、励振素子21及び22、給電線31及び
32、整合線路４及びグランド面５の形成手法と全く同様
である。そして、この実施例においても誘電体板１の表
面に設けた励振素子21、23及び給電線31、33と、誘電体
板１の裏面に設けた励振素子22、24及び給電線32、3
4が、誘電体板１の表面と裏面との中間において表面又
は裏面と平行となる面を鏡映面（対称面）として鏡映対
称（面対称）となるように形成してある。この実施例に
おけるアンテナは、誘電体板１の表裏面に各２個の励振
素子を縦方向に適宜間隔を隔てて配設してアレイアンテ
ナを形成することにより放射特性を改善するように形成
したもので、入出力端子６に高周波電力を加えることに
より、誘電体板１の前方及び後方の２方向に電波を放射
することは、図１に示した本発明アンテナと同様であ
る。図４には、誘電体板１の表面及び裏面に各２個の励
振素子を各縦方向に適宜間隔を隔てて配設した場合を例
示したが、所要の放射特性に応じて励振素子の数を増
し、又、所要の放射特性に応じて縦方向ではなく横方向
に適宜間隔を隔てて複数個の励振素子を配設し、更に、
横及び縦方向に適宜数の励振素子を適宜間隔を隔てて配
設して本発明を実施することができる。FIG. 4A is a perspective view showing another embodiment of the present invention, that is, a view of the antenna of the present invention viewed obliquely from the front.
FIG. 4 (b), in view of the present invention antenna obliquely from the rear, 1 dielectric plate, 2 1 and 2 3 driven element, 3 1 and 3 3 feed line, four matching line, 2 2 and 2 4 are driven element, 3 2 and 3 4 feed line, 5 a ground plane, the 6 input and output terminals, the material of the dielectric plate 1, the driven element 2 1 to 2 4, feeders 3 1 to 3 4 , formation method, etc. of the matching line 4 and the ground plane 5, the dielectric plate 1 of the material shown in FIG. 1, the excitation element 2 1 and 2 2, the feed line 3 1 and
3 2, is exactly the same as the formation method of the matching line 4 and the ground plane 5. Even the excitation element 2 1, 2 3 and the power supply line 3 1, 3 3 provided on the surface of the dielectric plate 1 in this embodiment, the excitation element 2 2 provided on the back surface of the dielectric plate 1, 2 4 and Feeder line 3 2 , 3
4 is formed so as to have mirror symmetry (plane symmetry) with a plane parallel to the front surface or the rear surface in the middle between the front surface and the rear surface of the dielectric plate 1 as a mirror plane (symmetric plane). The antenna in this embodiment is formed so that two excitation elements are disposed on the front and back surfaces of the dielectric plate 1 at appropriate intervals in the vertical direction to form an array antenna, thereby improving radiation characteristics. The application of high-frequency power to the input / output terminal 6 to radiate radio waves in two directions, forward and rearward of the dielectric plate 1, is the same as the antenna of the present invention shown in FIG. FIG. 4 illustrates an example in which two excitation elements are disposed on the front and back surfaces of the dielectric plate 1 at appropriate intervals in the vertical direction, but the number of excitation elements may be changed according to required radiation characteristics. In addition, a plurality of excitation elements are arranged at appropriate intervals in the horizontal direction instead of the vertical direction according to the required radiation characteristics,
The present invention can be implemented by arranging an appropriate number of excitation elements in the horizontal and vertical directions at appropriate intervals.
【００１１】図５もまた本発明の他の実施例を示す斜視
図で、１は第１の誘電体板で、表面及び裏面に図４に示
した励振素子21ないし24、給電線31ないし34、整合線路
４及びグランド面５と全く同様の励振素子、給電線、整
合線路及びグランド面を設け、下縁に入出力端子６を取
り付けてある。71は第２の誘電体板、81及び83は無給電
素子で、第１の誘電体板１の表面に設けた励振素子21及
び23に対応して設けてある。72は第３の誘電体板で、図
には現われていないが、板面に、第１の誘電体板１の裏
面に設けた励振素子に対応する無給電素子を設けてあ
る。この実施例における第１ないし第３の誘電体板の材
質、第１の誘電体板１の表裏面に設けた励振素子、給電
線、整合線路及びグランド面等の形成手法等は、図１に
示したものと同様で、無給電素子の形成手法、第１の誘
電体板１と第２及び第３の誘電体板71及び72との設置間
隔、結合方法、無給電素子を金属板で形成した場合にお
ける支持方法等は図２について説明したと同様である。
そして、この実施例においても第１の誘電体板１の表面
に設けた励振素子及び給電線と第１の誘電体板１の裏面
に設けた励振素子及び給電線が、第１の誘電体板１の表
面と裏面との中間において表面又は裏面と平行となる面
を鏡映面（対称面）として鏡映対称（面対称）となるよ
うに形成してある。したがって、この実施例における放
射特性が、図４に示した本発明アンテナに比し広帯域化
されている点を除くと、基本動作及びアンテナの前方と
後方の２方向に指向性のピ−クを有すること等は図４に
示したアンテナと同様である。[0011] Figure 5 also in perspective view showing another embodiment of the present invention, 1 is a first dielectric plate, to the driven element 2 1 illustrated in the front and back surfaces 4 2 4, feed line 3 1 to 3 4, matching line 4 and the ground surface 5 in exactly the same manner as the driven element, the feed line, the matching line and ground plane provided, is mounted an output terminal 6 to the lower edge. 7 1 and the second dielectric plate, the 8 1 and 8 3 parasitic element, is provided in correspondence with the first dielectric plate driven element 2 1 provided on the surface of 1 and 2 3. 7 2 in the third dielectric plate, although not shown in the figure, the plate surface is provided with a passive element which corresponds to the excitation element provided on the back surface of the first dielectric plate 1. FIG. 1 shows the materials of the first to third dielectric plates, the excitation elements provided on the front and back surfaces of the first dielectric plate 1, the feed lines, the matching lines, the ground plane, and the like in this embodiment. similar to that shown, it approaches the formation of parasitic elements, a first dielectric plate 1 and the second and third installation interval between the dielectric plate 7 1 and 7 2, coupling methods, the parasitic element metal plate The supporting method and the like in the case of forming in the same manner as described with reference to FIG.
Also in this embodiment, the excitation element and the power supply line provided on the front surface of the first dielectric plate 1 and the excitation element and the power supply line provided on the back surface of the first dielectric plate 1 correspond to the first dielectric plate. 1 is formed such that a plane parallel to the front surface or the back surface in the middle between the front surface and the back surface is a mirror plane (a plane of symmetry) and is mirror symmetric (plane symmetry). Therefore, except for the point that the radiation characteristic in this embodiment is wider than that of the antenna of the present invention shown in FIG. 4, the basic operation and the directivity peaks in the two directions of the front and rear of the antenna. It has the same as the antenna shown in FIG.
【００１２】図１及び図２には、励振素子及び無給電素
子の各輪郭形状を円形に形成した場合を例示したが、長
方形に形成してもよく、図４及び図５には励振素子及び
無給電素子の各輪郭形状を長方形に形成した場合を例示
したが、円形に形成してもよく、何れの実施例において
も励振素子及び無給電素子の各輪郭形状を円形又は長方
形の他、楕円形又は正方形等に形成して本発明を実施す
ることができる。FIGS. 1 and 2 show a case where the respective contours of the excitation element and the parasitic element are formed in a circular shape, but they may be formed in a rectangular shape, and FIGS. Although the case where each contour shape of the parasitic element is formed in a rectangular shape is illustrated, it may be formed in a circular shape, and in each embodiment, each contour shape of the excitation element and the parasitic element may be elliptical in addition to a circle or a rectangle. The present invention can be implemented by being formed in a shape or a square.
【００１３】[0013]
【発明の効果】本発明アンテナは、前方及び後方の２方
向に指向性のピ−クを有するという放射特性において
は、図６及び図７に示した従来のアンテナと同等である
が、これら従来のアンテナに較べて、本発明アンテナに
おいては励振素子を設ける誘電体板の数が１枚で足り、
給電回路を簡潔小型化でき、又、合成器の必要もないか
らアンテナ全体の占有体積を著しく小にすることが可能
で、各種設置環境条件に対してアンテナ設置の自由度を
大幅に拡大できると共に、製作も容易で、経済性に優れ
たものである等の特長を有する。The antenna according to the present invention is equivalent to the conventional antenna shown in FIGS. 6 and 7 in the radiation characteristics of having directivity peaks in two directions, forward and backward. As compared with the antenna of the present invention, in the antenna of the present invention, the number of dielectric plates provided with the excitation elements is one, and
The power supply circuit can be made simple and compact, and since there is no need for a combiner, the occupied volume of the entire antenna can be made extremely small, and the degree of freedom of antenna installation can be greatly expanded under various installation environment conditions. It has features such as easy manufacturing and excellent economical efficiency.
【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing one embodiment of the present invention.
【図２】本発明の他の実施例を示す図である。FIG. 2 is a diagram showing another embodiment of the present invention.
【図３】本発明アンテナの放射特性を示す図である。FIG. 3 is a diagram showing radiation characteristics of the antenna of the present invention.
【図４】本発明の他の実施例を示す図である。FIG. 4 is a diagram showing another embodiment of the present invention.
【図５】本発明の他の実施例を示す図である。FIG. 5 is a diagram showing another embodiment of the present invention.
【図６】従来のアンテナを示す図である。FIG. 6 is a diagram showing a conventional antenna.
【図７】従来のアンテナを示す図である。FIG. 7 is a diagram showing a conventional antenna.
【図８】従来のアンテナの放射特性を示す図である。FIG. 8 is a diagram illustrating radiation characteristics of a conventional antenna.
１ 誘電体板 21〜24 励振素子 31〜34 給電線 ４ 整合線路 ５ グランド面 ６ 入出力端子 71、72 誘電体板 81、83 無給電素子 111 、112 誘電体基板 121 、122 励振素子 131 、132 同軸給電ケ−ブル 14 合成器 171 、172 誘電体基板 181 、182 無給電素子DESCRIPTION OF SYMBOLS 1 Dielectric plate 2 1 to 2 4 Exciting element 3 1 to 3 4 Feeding line 4 Matching line 5 Ground plane 6 Input / output terminal 7 1 , 7 2 Dielectric plate 8 1 , 8 3 Parasitic element 11 1 , 11 2 Dielectric Body substrate 12 1 , 12 2 Excitation element 13 1 , 13 2 Coaxial feed cable 14 Combiner 17 1 , 17 2 Dielectric substrate 18 1 , 18 2 Parasitic element
───────────────────────────────────────────────────── フロントページの続き (72)発明者 工藤 友章 埼玉県川口市朝日２−９−１ (56)参考文献 特開 昭60−236303（ＪＰ，Ａ) 特開 平４−317204（ＪＰ，Ａ) 特開 平３−182102（ＪＰ，Ａ) 特開 昭61−236303（ＪＰ，Ａ) 特開 平１−236303（ＪＰ，Ａ) 特開 平２−186805（ＪＰ，Ａ) 特開 平４−317204（ＪＰ，Ａ) 特開 平１−272208（ＪＰ，Ａ) 実開 平３−9517（ＪＰ，Ｕ) 独国特許出願公開2921856（ＤＥ，Ａ １) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tomoaki Kudo 2-9-1, Asahi, Kawaguchi-shi, Saitama (56) References JP-A-60-236303 (JP, A) JP-A-4-317204 (JP, A) JP-A-3-182102 (JP, A) JP-A-61-236303 (JP, A) JP-A-1-236303 (JP, A) JP-A-2-186805 (JP, A) JP-A-4 317204 (JP, A) JP-A-1-272208 (JP, A) JP-A-3-9517 (JP, U) German Patent Application Publication 2921856 (DE, A1)
Claims (6)
着させた金属皮膜より成る第１の励振素子及びこの第１
の励振素子に接続される第１の給電線と、 前記誘電体板の裏面に各被着させた金属皮膜より成る第
２の励振素子及びこの第２の励振素子に接続される第２
の給電線とを備えると共に、 前記第１の励振素子及び前記第１の給電線と前記第２の
励振素子及び前記第２の給電線が、前記誘電体板の表面
と裏面との中間面を鏡映面として鏡映対称となるように
形成したことを特徴とする双方向指向性マイクロストリ
ップアンテナ。1. A first excitation element comprising a metal film deposited on a surface of a dielectric plate thinner than a radiation wavelength, and a first excitation element comprising
A first feeder line connected to the second excitation element, a second excitation element made of a metal film adhered to the back surface of the dielectric plate, and a second excitation line connected to the second excitation element.
And the first excitation element, the first power supply line, the second excitation element, and the second power supply line form an intermediate surface between the front surface and the back surface of the dielectric plate. A bidirectional directional microstrip antenna, wherein the mirror surface is formed so as to have mirror symmetry.
に各被着させた金属皮膜より成る第１の励振素子及びこ
の第１の励振素子に接続される第１の給電線と、 前記第１の誘電体板の裏面に各被着させた金属皮膜より
成る第２の励振素子及びこの第２の励振素子に接続され
る第２の給電線と、 前記第１の誘電体板の前方に放射波長に比し小なる間隔
を隔てて設けられ、放射波長に比し薄い第２の誘電体板
の板面に被着させた金属皮膜より成る第１の無給電素子
と、 前記第１の誘電体板の後方に放射波長に比し小なる間隔
を隔てて設けられ、放射波長に比し薄い第３の誘電体板
の板面に被着させた金属皮膜より成る第２の無給電素子
とを備えると共に、 前記第１の励振素子及び前記第１の給電線と前記第２の
励振素子及び前記第２の給電線が、前記第１の誘電体板
の表面と裏面との中間面を鏡映面として鏡映対称となる
ように形成したことを特徴とする双方向指向性マイクロ
ストリップアンテナ。2. A first excitation element composed of a metal film deposited on a surface of a first dielectric plate thinner than a radiation wavelength, and a first feeder line connected to the first excitation element. A second excitation element made of a metal film adhered to the back surface of the first dielectric plate, a second power supply line connected to the second excitation element, and the first dielectric A first parasitic element made of a metal film provided on the plate surface of the second dielectric plate thinner than the radiation wavelength and provided in front of the plate at a small interval relative to the radiation wavelength; A second metal film, which is provided behind the first dielectric plate at a small interval compared to the radiation wavelength and is applied to the plate surface of the third dielectric plate thinner than the radiation wavelength. And the first excitation element and the first power supply line, and the second excitation element and the second power supply line A bidirectional directional microstrip antenna, wherein an intermediate plane between a front surface and a rear surface of the first dielectric plate is formed as a mirror plane so as to be mirror-symmetric.
に各被着させた金属皮膜より成る第１の励振素子及びこ
の第１の励振素子に接続される第１の給電線と、 前記第１の誘電体板の裏面に各被着させた金属皮膜より
成る第２の励振素子及びこの第２の励振素子に接続され
る第２の給電線と、 前記第１の誘電体板の前方に放射波長に比し小なる間隔
を隔てて設けた金属板より成る第１の無給電素子と、 前記第１の誘電体板の後方に放射波長に比し小なる間隔
を隔てて設けた金属板より成る第２の無給電素子とを備
えると共に、 前記第１の励振素子及び前記第１の給電線と前記第２の
励振素子及び前記第２の給電線が、前記第１の誘電体板
の表面と裏面との中間面を鏡映面として鏡映対称となる
ように形成したことを特徴とする双方向指向性マイクロ
ストリップアンテナ。3. A first excitation element made of a metal film deposited on a surface of a first dielectric plate thinner than a radiation wavelength, and a first feeder line connected to the first excitation element. A second excitation element made of a metal film adhered to the back surface of the first dielectric plate, a second power supply line connected to the second excitation element, and the first dielectric A first parasitic element composed of a metal plate provided at a distance in front of the plate at a distance smaller than the radiation wavelength, and at a distance behind the first dielectric plate at a distance smaller than the radiation wavelength; A second parasitic element formed of a metal plate provided, wherein the first excitation element and the first power supply line, and the second excitation element and the second power supply line are the first excitation element and the second excitation element. Bidirectional directivity characterized by being mirror-symmetric with respect to the intermediate plane between the front and back surfaces of the dielectric plate Microstrip antenna.
いに適宜間隔を隔てて各被着させた金属皮膜より成る複
数個の励振素子と、 前記誘電体板の表面に被着させた金属皮膜より成り、前
記誘電体板の表面に設けた前記複数個の励振素子の各々
に接続される給電線と、 前記誘電体板の裏面に、互いに適宜間隔を隔てて各被着
させた金属皮膜より成る複数個の励振素子と、 前記誘電体板の裏面に被着させた金属皮膜より成り、前
記誘電体板の裏面に設けた前記複数個の励振素子の各々
に接続される給電線とを備えると共に、 前記誘電体板の表面に設けた前記複数個の励振素子及び
前記給電線と前記誘電体板の裏面に設けた前記複数個の
励振素子及び前記給電線が、前記誘電体板の表面と裏面
との中間面を鏡映面として鏡映対称となるように形成し
たことを特徴とする双方向指向性マイクロストリップア
ンテナ。4. A plurality of excitation elements each composed of a metal film applied on a surface of a dielectric plate thinner than the radiation wavelength at an appropriate distance from each other, and applied on the surface of the dielectric plate. And a power supply line connected to each of the plurality of excitation elements provided on a surface of the dielectric plate, and a back surface of the dielectric plate, which are provided at appropriate intervals from each other. A plurality of excitation elements formed of a metal film; and a feed line formed of a metal film adhered to the back surface of the dielectric plate and connected to each of the plurality of excitation elements provided on the back surface of the dielectric plate. The plurality of excitation elements and the power supply line provided on the front surface of the dielectric plate and the plurality of excitation elements and the power supply line provided on the back surface of the dielectric plate are provided on the dielectric plate. The mirror surface is defined as the mirror plane between the front and back sides of the A bidirectional directional microstrip antenna, characterized in that:
に、互いに適宜間隔を隔てて各被着させた金属皮膜より
成る複数個の励振素子と、 前記第１の誘電体板の表面に被着させた金属皮膜より成
り、前記第１の誘電体板の表面に設けた前記複数個の励
振素子の各々に接続される給電線と、 前記第１の誘電体板の裏面に、互いに適宜間隔を隔てて
各被着させた金属皮膜より成る複数個の励振素子と、 前記第１の誘電体板の裏面に被着させた金属皮膜より成
り、前記第１の誘電体板の裏面に設けた前記複数個の励
振素子の各々に接続される給電線と、 前記第１の誘電体板の前方に、放射波長に比し小なる間
隔を隔てて設けられ、放射波長に比し薄い第２の誘電体
板の板面に、互いに適宜間隔を隔てて各被着させた金属
皮膜より成り、前記第１の誘電体板の表面に設けた前記
複数個の励振素子に対応する複数個の無給電素子と、 前記第１の誘電体板の後方に、放射波長に比し小なる間
隔を隔てて設けられ、放射波長に比し薄い第３の誘電体
板の板面に、互いに適宜間隔を隔てて各被着させた金属
皮膜より成り、前記第１の誘電体板の裏面に設けた前記
複数個の励振素子に対応する複数個の無給電素子とを備
えると共に、 前記第１の誘電体板の表面に設けた前記複数個の励振素
子及び前記給電線と前記第１の誘電体板の裏面に設けた
前記複数個の励振素子及び前記給電線が、前記第１の誘
電体板の表面と裏面との中間面を鏡映面として鏡映対称
となるように形成したことを特徴とする双方向指向性マ
イクロストリップアンテナ。5. A plurality of excitation elements each comprising a metal film applied to a surface of a first dielectric plate thinner than a radiation wavelength at appropriate intervals from each other, and said first dielectric plate. A power supply line formed of a metal film adhered to the surface of the first dielectric plate and connected to each of the plurality of excitation elements provided on the surface of the first dielectric plate; A plurality of excitation elements made of metal films applied to each other at appropriate intervals from each other; and a metal film applied to the back surface of the first dielectric plate. A power supply line connected to each of the plurality of excitation elements provided on the back surface; and a power supply line provided in front of the first dielectric plate with a small interval relative to a radiation wavelength, and The first dielectric plate is made of a metal film that is applied to the plate surface of the thin second dielectric plate at appropriate intervals from each other; A plurality of parasitic elements corresponding to the plurality of excitation elements provided on the surface of the dielectric plate, and provided behind the first dielectric plate at a distance smaller than a radiation wavelength, A plurality of excitation films provided on the back surface of the first dielectric plate, each of which is formed of a metal film applied on a plate surface of a third dielectric plate thinner than a radiation wavelength at an appropriate distance from each other; A plurality of parasitic elements corresponding to the elements are provided, and the plurality of excitation elements and the feeder line provided on the surface of the first dielectric plate and the feeder line are provided on the back surface of the first dielectric plate. The two-way directivity, wherein the plurality of excitation elements and the power supply line are formed so as to be mirror-symmetric with respect to an intermediate plane between a front surface and a back surface of the first dielectric plate. Microstrip antenna.
に、互いに適宜間隔を隔てて各被着させた金属皮膜より
成る複数個の励振素子と、 前記第１の誘電体板の表面に被着させた金属皮膜より成
り、前記第１の誘電体板の表面に設けた前記複数個の励
振素子の各々に接続される給電線と、 前記第１の誘電体板の裏面に、互いに適宜間隔を隔てて
各被着させた金属皮膜より成る複数個の励振素子と、 前記第１の誘電体板の裏面に被着させた金属皮膜より成
り、前記第１の誘電体板の裏面に設けた前記複数個の励
振素子の各々に接続される給電線と、 前記第１の誘電体板の前方に、放射波長に比し小なる間
隔を隔てて設けられ、前記第１の誘電体板の表面に設け
た前記複数個の励振素子に対応する金属板より成る複数
個の無給電素子と、 前記第１の誘電体板の後方に、放射波長に比し小なる間
隔を隔てて設けられ、前記第１の誘電体板の裏面に設け
た前記複数個の励振素子に対応する金属板より成る複数
個の無給電素子とを備えると共に、 前記第１の誘電体板の表面に設けた前記複数個の励振素
子及び前記給電線と前記第１の誘電体板の裏面に設けた
前記複数個の励振素子及び前記給電線が、前記第１の誘
電体板の表面と裏面との中間面を鏡映面として鏡映対称
となるように形成したことを特徴とする双方向指向性マ
イクロストリップアンテナ。6. A plurality of excitation elements each formed of a metal film applied on a surface of a first dielectric plate thinner than a radiation wavelength at appropriate intervals from each other, and said first dielectric plate. A power supply line formed of a metal film adhered to the surface of the first dielectric plate and connected to each of the plurality of excitation elements provided on the surface of the first dielectric plate; A plurality of excitation elements made of metal films applied to each other at appropriate intervals from each other; and a metal film applied to the back surface of the first dielectric plate. A feeder line connected to each of the plurality of excitation elements provided on the back surface, and a first dielectric plate provided in front of the first dielectric plate at a distance smaller than a radiation wavelength; A plurality of parasitic elements made of a metal plate corresponding to the plurality of excitation elements provided on the surface of the body plate; A plurality of metal plates which are provided behind the first dielectric plate at a distance smaller than the emission wavelength and which correspond to the plurality of excitation elements provided on the back surface of the first dielectric plate; And the plurality of excitation elements provided on the front surface of the first dielectric plate, and the plurality of excitation elements provided on the back surface of the power supply line and the first dielectric plate. And a bidirectional directional microstrip antenna, wherein the feeder line is formed so as to be mirror-symmetric with an intermediate plane between the front and back surfaces of the first dielectric plate as a mirror plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6054738A JP2742210B2 (en) | 1994-02-28 | 1994-02-28 | Bidirectional directional microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6054738A JP2742210B2 (en) | 1994-02-28 | 1994-02-28 | Bidirectional directional microstrip antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07240622A JPH07240622A (en) | 1995-09-12 |
| JP2742210B2 true JP2742210B2 (en) | 1998-04-22 |
Family
ID=12979134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6054738A Expired - Fee Related JP2742210B2 (en) | 1994-02-28 | 1994-02-28 | Bidirectional directional microstrip antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2742210B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11177335A (en) * | 1997-12-15 | 1999-07-02 | Nec Corp | Antenna system |
| WO2007046134A1 (en) * | 2005-10-18 | 2007-04-26 | Fujitsu Limited | Antenna device and rfid tag |
| JP5298387B2 (en) * | 2009-02-27 | 2013-09-25 | 独立行政法人 宇宙航空研究開発機構 | Antenna device and phased array antenna device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2921856A1 (en) | 1979-05-30 | 1982-04-29 | Siemens AG, 1000 Berlin und 8000 München | Broad-band directional dipole aerial - has diverging elements arranged on either side of insulation plate |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2643925B2 (en) * | 1984-05-09 | 1997-08-25 | 日本電気株式会社 | antenna |
| JPS61236303A (en) * | 1985-04-09 | 1986-10-21 | Hitachi Kiden Kogyo Ltd | Conveying apparatus |
| JPS61277207A (en) * | 1985-05-31 | 1986-12-08 | Nitto Electric Ind Co Ltd | Dielectric substrate and its production |
| JPH0218581Y2 (en) * | 1986-12-25 | 1990-05-24 | ||
| JPH01272208A (en) * | 1988-04-22 | 1989-10-31 | Mitsubishi Electric Corp | Small-sized dipole array antenna |
| JPH02186805A (en) * | 1989-01-13 | 1990-07-23 | Mitsubishi Electric Corp | Antenna device |
| JPH03182102A (en) * | 1989-12-11 | 1991-08-08 | Toyota Central Res & Dev Lab Inc | Microstrip antenna |
| JPH0457907U (en) * | 1990-09-25 | 1992-05-19 | ||
| JPH04317204A (en) * | 1991-04-17 | 1992-11-09 | Iwatsu Electric Co Ltd | Antenna |
| JPH04323905A (en) * | 1991-04-23 | 1992-11-13 | Asahi Glass Co Ltd | Plane antenna and on-vehicle antenna |
| JPH06334420A (en) * | 1993-05-21 | 1994-12-02 | Casio Comput Co Ltd | Plate antenna with parasitic element |
| JPH07240619A (en) * | 1994-03-01 | 1995-09-12 | Nippon Telegr & Teleph Corp <Ntt> | Printed antenna |
| JP3009517U (en) * | 1994-09-27 | 1995-04-04 | 重子 武藤 | Hand truck |
-
1994
- 1994-02-28 JP JP6054738A patent/JP2742210B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2921856A1 (en) | 1979-05-30 | 1982-04-29 | Siemens AG, 1000 Berlin und 8000 München | Broad-band directional dipole aerial - has diverging elements arranged on either side of insulation plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07240622A (en) | 1995-09-12 |
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