JP2000077934A - Polarization switching loop antenna - Google Patents

Polarization switching loop antenna

Info

Publication number
JP2000077934A
JP2000077934A JP10241628A JP24162898A JP2000077934A JP 2000077934 A JP2000077934 A JP 2000077934A JP 10241628 A JP10241628 A JP 10241628A JP 24162898 A JP24162898 A JP 24162898A JP 2000077934 A JP2000077934 A JP 2000077934A
Authority
JP
Japan
Prior art keywords
polarization
loop
antenna
ground plate
monopole
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.)
Pending
Application number
JP10241628A
Other languages
Japanese (ja)
Inventor
Yasushi Koshiro
康 小代
Takeshi Hirakuri
健史 平栗
Kazuhiro Hirasawa
一紘 平沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP10241628A priority Critical patent/JP2000077934A/en
Publication of JP2000077934A publication Critical patent/JP2000077934A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an antenna capable of corresponding to the direction of polarization without changing the direction and structure of the antenna. SOLUTION: This antenna provides a monopole 1 and loop-shaped wire on one surface of a ground plate 6, has a loop shape part 3 and two linear parts 4 and 5 which are parallel with the plate 6 and provides the parts 4 and 5 in parallel with the monopole 1 with intervals 7. Also, a polarization changeover switch 8 is inserted between the part 4 and the ground plate 6 and a polarization changeover switch 9 is inserted between the part 5 and the plate 6. And, it is possible to easily correspond to linear polarization, right hand circular polarization and left hand circular polarization by changing the switches 8 and 9.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、グランド板、ルー
プ状ワイヤー、モノポール、給電部を備えた偏波切替え
ループアンテナに関するものであり、特に直線偏波、右
旋円偏波、左旋円偏波を容易に切替えることができる偏
波切替え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 polarization switching loop antenna provided with a ground plate, a loop-shaped wire, a monopole, and a feeder, and more particularly, to a linearly polarized wave, a right-handed circularly polarized wave, and a left-handed circularly polarized light. The present invention relates to a polarization switching antenna that can easily switch waves.

【0002】[0002]

【従来の技術】従来、導体板にスロットを設け、その両
側の導体に給電線を接続するスロットアンテナが知られ
ている(例えば特開平5−110334号公報参照)。
また右旋円偏波及び左旋円偏波を共用して受信できるよ
うにしたマイクロスリップアンテナが知られている(例
えば特開平7−176944号公報参照)。
2. Description of the Related Art Conventionally, there has been known a slot antenna in which a slot is provided in a conductor plate and feeders are connected to conductors on both sides of the slot (for example, see Japanese Patent Application Laid-Open No. Hei 5-110334).
There is also known a microslip antenna capable of receiving both right-handed circularly polarized light and left-handed circularly polarized wave in common (for example, see Japanese Patent Application Laid-Open No. 7-176944).

【0003】[0003]

【発明が解決しようとする課題】従来技術のアンテナ
は、偏波の向きが変わった場合に問題があった。すなわ
ち無線通信やラジオ、テレビ放送に用いられる直線偏波
や円偏波を送信、受信するアンテナは、その偏波の向き
をお互いに合わせて使用し、偏波の向きが変わった場合
は、アンテナの向きや構造を変えなければならないもの
であった。本発明の目的は、アンテナの向きや構造を変
えることなく偏波の向きに対応することができ、また直
線偏波にも円偏波にも利用できる構造のアンテナを提供
する。
The prior art antenna has a problem when the direction of polarization changes. In other words, antennas that transmit and receive linearly and circularly polarized waves used for wireless communication, radio, and television broadcasting use the directions of their polarizations in accordance with each other. Had to change the direction and structure of the An object of the present invention is to provide an antenna having a structure that can cope with the direction of polarization without changing the direction and structure of the antenna, and can be used for both linearly and circularly polarized waves.

【0004】[0004]

【課題を解決するための手段】本発明の偏波切替えルー
プアンテナは、グランド板、ループ状ワイヤー、モノポ
ール、給電部を備えたループアンテナにおいて、グラン
ド板の一方の面にはモノポールとループ状ワイヤーが設
けられ、前記ループ状ワイヤーはグランド板に対して平
行なループ状部とループの一個所を切り取るように折り
曲げた2本の直線部を有し、前記2本の直線部は前記モ
ノポールに間隔をとって平行に設けられ、前記2本の直
線部の端部とグランド板の間に偏波切替えスイッチが挿
入され、モノポールとグランド板に給電線を接続してい
ることを特徴とするものである。また、本発明の偏波切
替えループアンテナの偏波切替えスイッチが、手動また
は電子的手段であることを特徴とするものである。
According to the present invention, there is provided a polarization switching loop antenna comprising a ground plate, a loop-shaped wire, a monopole, and a feeder, wherein a monopole and a loop are provided on one surface of the ground plate. A loop-shaped wire is provided, the loop-shaped wire has a loop-shaped portion parallel to a ground plate and two straight portions bent so as to cut out one portion of the loop, and the two straight portions are the mono-shaped portions. It is provided in parallel with a gap between the poles, a polarization changeover switch is inserted between the ends of the two linear portions and the ground plate, and a power supply line is connected to the monopole and the ground plate. Things. Further, the polarization changeover switch of the polarization changeover loop antenna of the present invention is a manual or electronic means.

【0005】[0005]

【作用】本発明において、グランド板にモノポールとル
ープ状ワイヤーが設けられ、ループ状ワイヤーはグラン
ド板に対して平行なループ状部とループの一個所を切り
取るように折り曲げられた2本の直線部を有し、モノポ
ールで給電しているので、対称性のよい放射パターンを
持つ円偏波アンテナを構成できるものである。また、2
本の直線部の端部はグランド板との間に偏波切替えスイ
ッチが挿入されているので、そのスイッチを切替えるこ
とにより、直線偏波、右旋円偏波、左旋円偏波に容易に
対応することができるものである。
In the present invention, a monopole and a loop-shaped wire are provided on a ground plate, and the loop-shaped wire is formed into a loop-shaped portion parallel to the ground plate and two straight lines bent so as to cut out one portion of the loop. Since the power is fed by the monopole, a circularly polarized antenna having a radiation pattern with good symmetry can be formed. Also, 2
A polarization changeover switch is inserted between the end of the straight part and the ground plate. By switching the switch, it can easily handle linear polarization, right-handed circular polarization, and left-handed circular polarization. Is what you can do.

【0006】ループ状ワイヤーの2本の直線部の端部と
グランド板との間に偏波切替えスイッチを挿入し、平行
なループ状部からスイッチが離れているので、偏波切替
えスイッチは、アンテナの放射特性に影響を与えないも
のである。また、ループ状部とモノポールが離れ、かつ
直交しているのでアンテナの入力インピーダンスがルー
プ形状によって変化しにくいものである。
A polarization switch is inserted between the ends of the two linear portions of the loop-shaped wire and the ground plate, and the switch is separated from the parallel loop portions. Does not affect the radiation characteristics of the Further, since the loop-shaped portion and the monopole are separated and orthogonal to each other, the input impedance of the antenna is hardly changed by the loop shape.

【0007】[0007]

【発明の実施の形態】本発明において、ループ状ワイヤ
ーがグランド板に対して平行に設けられているので、特
性の優れたループアンテナとなり、またグランド板はア
ースと同様の作用をするものである。ループ状ワイヤー
のループは、例えば円形、楕円形、三角形、四角形、五
角形、菱形等のいずれでもよい。また、ループ半径と高
さを適当に選ぶことにより、良好な軸比特性を持つ円偏
波アンテナとすることができるものである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, since a loop-shaped wire is provided in parallel with a ground plate, it becomes a loop antenna having excellent characteristics, and the ground plate has the same function as ground. . The loop of the loop-shaped wire may be, for example, any of a circle, an ellipse, a triangle, a square, a pentagon, and a rhombus. Further, by appropriately selecting the loop radius and the height, a circularly polarized antenna having good axial ratio characteristics can be obtained.

【0008】軸比については、偏波が時間的に変動し、
電界の包絡線が楕円となる場合を楕円偏波といい、この
楕円の長軸と短軸の比を軸比という。特に軸比が1に近
いものが良好な軸比特性を持つ円偏波である。さて、楕
円偏波は右旋円偏波成分と左旋円偏波成分とに分解する
ことができ、一方の偏波成分が大部分を占めるとき円偏
波となり、逆旋偏波成分が含まれると楕円偏波となる。
同一周波数において右旋円偏波と左旋円偏波で違う情報
を送ることを考えた場合、例えば軸比特性の悪い右旋円
偏波用アンテナで受信すると左旋円偏波もわずかに受信
してしまい、情報の識別能力が低下してしまう。したが
って、周波数の有効利用の目的においては、軸比特性の
良好なものが望まれる。
With respect to the axial ratio, the polarization varies with time,
The case where the envelope of the electric field is elliptical is called elliptical polarization, and the ratio of the major axis to the minor axis of the ellipse is called the axial ratio. In particular, those having an axial ratio close to 1 are circularly polarized waves having good axial ratio characteristics. Now, elliptical polarization can be decomposed into right-handed and left-handed circular polarization components, and when one of the polarization components occupies the majority, it becomes circularly-polarized and contains a counter-polarized polarization component. And elliptical polarization.
When considering sending different information between right-handed circular polarization and left-handed circular polarization at the same frequency, for example, when receiving with a right-handed circularly polarized antenna with poor axial ratio characteristics, the left-handed circularly polarized wave is also slightly received. As a result, the ability to identify information is reduced. Therefore, for the purpose of effective use of frequency, one having good axial ratio characteristics is desired.

【0009】また本発明において、ループ状ワイヤーの
一個所を切り取るように折り曲げられた2本の直線部
と、モノポールは間隔をとって平行に設けられているも
ので、モノポールに給電される電流によって、ループ状
ワイヤーの直線部に電流が誘導される。偏波切替えスイ
ッチは、アンテナの放射特性に影響を与えないようルー
プの端に接続された直線ワイヤーとグランド板とのギャ
ップに挿入するものであり、偏波切替えスイッチとして
は、手動により開閉動作を行うスイッチ、電子的手段、
例えばダイオードによる偏波切替えスイッチ回路が用い
られる。給電部は、一方をグランド板に、もう一方をモ
ノポールに接続しているもので、例えば、同軸ケーブル
の外部導体をグランド板に接続し、中心導体をモノポー
ルに接続する。
In the present invention, the monopole and the two straight portions bent so as to cut out one portion of the loop-shaped wire and the monopole are provided at an interval and supplied to the monopole. The current induces a current in the straight portion of the loop wire. The polarization changeover switch is inserted into the gap between the straight wire connected to the end of the loop and the ground plate so as not to affect the radiation characteristics of the antenna.As the polarization changeover switch, the opening and closing operation is manually performed. Switches to perform, electronic means,
For example, a polarization switching switch circuit using a diode is used. The feeder has one end connected to the ground plate and the other end connected to the monopole. For example, the outer conductor of the coaxial cable is connected to the ground plate, and the center conductor is connected to the monopole.

【0010】[0010]

【実施例】本発明の実施例を図1〜図5を参照して説明
する。図1(a)は実施例の偏波切替えループアンテナ
の見取り図、(b)は側面図、(c)は平面図である。
図1(a)〜(c)に示すように、グランド板(6)の
一方の面にはモノポール(1)とループ状ワイヤーが設
けられている。ループ状ワイヤーはグランド板(6)に
対して平行なループ状部(3)とループの一個所を切り
取るように折り曲げられた2本の直線部(4)(5)を
有している。ループ状ワイヤーの2本の直線部(4)
(5)はモノポール(1)に間隔(7)をとって平行に
設けられている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a sketch of a polarization switching loop antenna of an embodiment, FIG. 1B is a side view, and FIG. 1C is a plan view.
As shown in FIGS. 1A to 1C, a monopole (1) and a loop-shaped wire are provided on one surface of the ground plate (6). The loop wire has a loop portion (3) parallel to the ground plate (6) and two straight portions (4) and (5) bent so as to cut out one portion of the loop. Two straight sections of looped wire (4)
(5) is provided in parallel with the monopole (1) at an interval (7).

【0011】ループ状ワイヤーの直線部(4)の端部と
グランド板(6)との間に偏波切替えスイッチ(8)が
挿入される。またループ状ワイヤーの直線部(5)の端
部とグランド板(6)との間に偏波切替えスイッチ
(9)が挿入される。給電部の同軸線(2)は、その外
部導体がグランド板(6)に接続し、中心導体がモノポ
ール(1)に接続している。
A polarization switch (8) is inserted between the end of the linear portion (4) of the loop-shaped wire and the ground plate (6). A polarization changeover switch (9) is inserted between the end of the linear portion (5) of the loop-shaped wire and the ground plate (6). The outer conductor of the coaxial cable (2) of the power supply unit is connected to the ground plate (6), and the center conductor is connected to the monopole (1).

【0012】このアンテナの具体的なサイズの一例を、
λ(使用波長)との関係で示すと、ループ状ワイヤーの
ループ状部(3)の半径は0.184λ、ループ状ワイ
ヤーの直線部(4)の長さ(グランド板(6)に対して
平行なループ状部(3)の高さ)は0.17λ,直線部
(4)(5)とモノポール(1)との間隔(7)は0.
025λ、ループ状ワイヤーの直線部(4)(5)の端
部とグランド板(6)との間隔(8)(9)は0.01
λ、である。
An example of a specific size of the antenna is as follows.
In terms of the relationship with λ (used wavelength), the radius of the loop portion (3) of the loop wire is 0.184λ, and the length of the straight portion (4) of the loop wire (with respect to the ground plate (6)). The height of the parallel loop portion (3) is 0.17λ, and the interval (7) between the straight portions (4) and (5) and the monopole (1) is 0.
025λ, the distance (8) (9) between the end of the linear portion (4) (5) of the loop wire and the ground plate (6) is 0.01
λ.

【0013】図2は、図1の偏波切替えスイッチにダイ
オードを用いた偏波切替えスイッチ回路の例を示すもの
で、スイッチ(9)は、コンデンサ(直流阻止用)C
1、ダイオードD1、チョークコイル(高周波阻止用)
L1を有し、またスイッチ(8)は、コンデンサ(直流
阻止用)C2、ダイオードD2、チョークコイル(高周
波阻止用)L2を有している。SW1で偏波切替えを行
うものである。なおBは直流電源、例えば電池である。
FIG. 2 shows an example of a polarization changeover switch circuit using a diode as the polarization changeover switch shown in FIG. 1. A switch (9) includes a capacitor (for blocking direct current) C.
1. Diode D1, choke coil (for blocking high frequency)
The switch (8) has a capacitor (for blocking direct current) C2, a diode D2, and a choke coil (for blocking high frequency) L2. Polarization switching is performed by SW1. B is a DC power supply, for example, a battery.

【0014】図3〜図5で、上記図1に示した構成の偏
波切替えループアンテナの動作を説明する。図3は、ル
ープ状ワイヤーの直線部(4)の端部の偏波切替えスイ
ッチ(8)がグランド板(6)に接続され、直線部
(5)の端部の偏波切替えスイッチ(9)が開放されて
いる。給電部の同軸線(2)からモノポール(1)に給
電され、ループ状ワイヤーの直線部(4)(5)に電流
が誘導される。この場合スイッチ(9)が開放されてい
るので、矢印Aのように進行波電流が流れ左旋円偏波が
放射される。
The operation of the polarization switching loop antenna having the configuration shown in FIG. 1 will be described with reference to FIGS. FIG. 3 shows a polarization change switch (8) at the end of the linear portion (4) of the loop wire connected to the ground plate (6), and a polarization change switch (9) at the end of the linear portion (5). Is open. Power is supplied to the monopole (1) from the coaxial line (2) of the power supply unit, and current is induced in the linear portions (4) and (5) of the loop-shaped wire. In this case, since the switch (9) is open, a traveling wave current flows as shown by an arrow A, and a left-hand circularly polarized wave is emitted.

【0015】図4は、ループ状ワイヤーの直線部(5)
の端部の偏波切替えスイッチ(9)がグランド板(6)
に接続され、直線部(4)の端部の偏波切替えスイッチ
(8)が開放されている。給電部の同軸線(2)からモ
ノポール(1)に給電され、ループ状ワイヤーの直線部
(4)(5)に電流が誘導される。この場合スイッチ
(8)が開放されているので、矢印Bのように進行波電
流が流れ右旋円偏波が放射される。
FIG. 4 shows a linear portion (5) of a loop-shaped wire.
The polarization changeover switch (9) at the end of the ground plate (6)
And the polarization changeover switch (8) at the end of the linear portion (4) is open. Power is supplied to the monopole (1) from the coaxial line (2) of the power supply unit, and current is induced in the linear portions (4) and (5) of the loop-shaped wire. In this case, since the switch (8) is open, a traveling wave current flows as shown by an arrow B, and a right-handed circularly polarized wave is emitted.

【0016】図5は、ループ状ワイヤーの直線部(4)
(5)の端部の偏波切替えスイッチ(8)(9)が開放
されている。給電部の同軸線(2)からモノポール
(1)に給電され、ループ状ワイヤーの直線部(4)
(5)に電流が誘導される。この場合スイッチ(8)
(9)が開放されているので、矢印A、Bのように電流
が流れ、これらは均等になり、定在波電流となり直線偏
波が放射されることになる。
FIG. 5 shows a linear portion (4) of a loop-shaped wire.
The polarization changeover switches (8) and (9) at the end of (5) are open. Power is supplied from the coaxial line (2) of the power supply unit to the monopole (1), and the linear portion of the loop-shaped wire (4)
A current is induced in (5). In this case switch (8)
Since (9) is open, currents flow as shown by arrows A and B, and they become uniform, become standing wave currents, and linearly polarized waves are radiated.

【0017】上記図3〜図5で放射する場合に付いて説
明したが、左旋円偏波を受信する場合には図3に示すよ
うに、右旋円偏波を受信する場合には図4に示すよう
に、また直線偏波を受信する場合には図5に示すよう
に、それぞれ偏波切替えスイッチ(8)(9)を切替え
ることにより対応することができる。
Although the case of radiating light has been described with reference to FIGS. 3 to 5, as shown in FIG. 3 when receiving a left-handed circularly polarized wave, as shown in FIG. As shown in FIG. 5, and when receiving linearly polarized waves, as shown in FIG. 5, it is possible to respond by switching the polarization changeover switches (8) and (9).

【0018】[0018]

【発明の効果】以上述べたように、本発明によれば、ル
ープ状ワイヤーの直線部の端部はグランド板との間に偏
波切替えスイッチが挿入されているので、そのスイッチ
を切替えることにより、直線偏波、右旋円偏波、左旋円
偏波に容易に対応することができるもので、具体的に
は、テレビジョンの衛星放送では、CS放送で直線偏
波、BS放送で円偏波が用いられており、これらを移動
しながら受信する際に、移動局の姿勢、位置(国)によ
り偏波の向きが替わっても、偏波切替えスイッチにより
アンテナの偏波特性を切替えることによって受信でき
る。またラジオやテレビジョンの地上波による放送で
は、フェージングや都市部におけるゴースト障害などの
電波環境の変化にも追従できるものである。衛星を用い
た移動体通信においても、移動体の姿勢の変動に対し
て、アンテナの偏波の向きを高速に切替えることができ
る。そして、さまざまな通信、放送において、このよう
に直交する2偏波を用いて、同じ周波数で異なる情報を
送受するような場合、このアンテナ一つでそれを行なう
ことができる等の効果を有するものである。
As described above, according to the present invention, since the polarization changeover switch is inserted between the end of the linear portion of the loop-shaped wire and the ground plate, the switch is switched over. , Linear polarization, right-handed circular polarization, and left-handed circular polarization. More specifically, in television satellite broadcasting, linear polarization is used in CS broadcasting, and circular polarization is used in BS broadcasting. Waves are used, and when receiving these while moving, even if the direction of polarization changes depending on the posture and position (country) of the mobile station, the polarization switch of the antenna switches the polarization characteristics of the antenna. Can be received by Moreover, in the broadcasting by radio or television terrestrial waves, it is possible to follow changes in the radio wave environment such as fading and ghost obstacles in urban areas. Also in mobile communication using a satellite, the direction of polarization of the antenna can be switched at high speed in response to a change in attitude of the mobile object. In various communications and broadcasts, when two orthogonal polarizations are used to transmit and receive different information at the same frequency, this antenna has the effect of being able to perform it with one antenna. It is.

【0019】また、屋内での高速無線通信、例えばパソ
コンの室内無線LAN(LocalArea Netw
ork)などでは円偏波が有効であり、そのアンテナと
して本発明の偏波切替えアンテナが有効なものである。
これは屋内での高速無線通信では壁や床からの電波の反
射が生じ、直線偏波を用いた場合は直接波との合成波の
干渉により受信電力に場所による変動(フェージング)
が生じ、伝送品質が劣化する。このような状況に対して
円偏波を用いた場合、直線偏波を用いた場合よりも劣化
が少なくなると考えられる。また、隣り合った送受信装
置で逆旋の円偏波を用いれば周波数の有効利用ができ
る。このような円偏波の利用を考えた場合、そのアンテ
ナとしてどの場所においても送受信ができる本発明の偏
波切替えアンテナが有効なものである。
Also, high-speed wireless communication indoors, for example, an indoor wireless LAN (Local Area Network) of a personal computer.
In (ork) and the like, circular polarization is effective, and the polarization switching antenna of the present invention is effective as the antenna.
This is because in high-speed wireless communication indoors, radio waves are reflected from walls and floors. When linearly polarized waves are used, the received power fluctuates depending on the location (fading) due to interference of a composite wave with a direct wave.
And transmission quality is degraded. In such a situation, it is considered that when circularly polarized waves are used, deterioration is smaller than when linearly polarized waves are used. In addition, the frequency can be effectively used by using the circularly polarized wave of the opposite rotation in the adjacent transmitting and receiving devices. Considering the use of such circularly polarized waves, the polarization switching antenna of the present invention, which can transmit and receive anywhere, is effective as the antenna.

【0020】また、移動体通信におけるダイバーシチ受
信のアンテナとして本発明のアンテナは有効である。都
市部などでは、ビルなどからの反射波と直接波が干渉
し、フェージングが発生する。これにより受信電力が場
所によって低くなってしまい、通信に障害が発生する。
この対策として直線偏波を用いた通信では、2本のアン
テナを用い、空間的に距離をおいて受信電力の大きいほ
うで受信するスペースダイバーシチ、垂直偏波と水平偏
波を切替えて受信電力の大きいほうで受信する偏波ダイ
バーシチ、とする方法がある。移動体通信に円偏波が用
いられた場合、直接波に対して反射波は逆旋になるため
フェージングが生じにくい。しかし、直接波が届きにく
い場所において通常の円偏波用アンテナでは逆旋の円偏
波が受信できないため、通信ができない。本発明のアン
テナであればそういった場所に入ったときも高速に偏波
の切替えができるため、反射波を利用して通信ができ
る。このように円偏波を用いた移動体通信で有効なもの
となる等の効果を奏するものである。
Further, the antenna of the present invention is effective as an antenna for diversity reception in mobile communication. In an urban area or the like, a reflected wave from a building or the like and a direct wave interfere, and fading occurs. As a result, the reception power decreases depending on the location, and a failure occurs in communication.
As a countermeasure, in communication using linear polarization, two antennas are used, space diversity for receiving at a larger spatial distance and receiving power at a higher level, and switching between vertical polarization and horizontal polarization for receiving power. There is a method in which polarization diversity is received by the larger one. When circularly polarized waves are used for mobile communication, fading is less likely to occur because the reflected wave has a reverse rotation to the direct wave. However, in a place where direct waves are difficult to reach, a normal circularly polarized wave antenna cannot receive circularly polarized waves in reverse rotation, so that communication is not possible. With the antenna of the present invention, the polarization can be switched at high speed even when entering such a place, so that communication can be performed using reflected waves. As described above, the present invention has the effect of being effective in mobile communication using circularly polarized waves.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例を示す図FIG. 1 shows an embodiment of the present invention.

【図2】本発明の実施例のスイッチ回路を示す図FIG. 2 is a diagram showing a switch circuit according to an embodiment of the present invention.

【図3】本発明の実施例の作動を示す図FIG. 3 is a diagram showing the operation of the embodiment of the present invention.

【図4】本発明の実施例の作動を示す図FIG. 4 is a diagram showing the operation of the embodiment of the present invention.

【図5】本発明の実施例の作動を示す図FIG. 5 is a diagram showing the operation of the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1, モノポール 2, 同軸線 3, ループ状ワイヤーのループ状部 4,5, ループ状ワイヤーの直線部 6, グランド板 7, 間隔(ループ状ワイヤーの2本の直線部とモノポ
ールのギャプ) 8,9、スイッチ C1.C2. コンデンサ(直流阻止用) L1.L2. チョークコイル(高周波阻止用) D1.D2. ダイオード SW1. 偏波切替えスイッチ B.直流電源、例えば電池
1, monopole 2, coaxial line 3, loop portion of loop wire 4, 5, straight portion of loop wire 6, ground plate 7, interval (two straight portions of loop wire and gap of monopole) 8, 9, switch C1. C2. Capacitor (for blocking DC) L1. L2. Choke coil (for blocking high frequency) D1. D2. Diode SW1. Polarization switch B. DC power supply, for example batteries

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小代 康 埼玉県岩槻市東岩槻5−10−23 (72)発明者 平栗 健史 茨城県つくば市下平塚131桜井アパート11 (72)発明者 平沢 一紘 茨城県つくば市天久保1−10−12−2− 403 Fターム(参考) 5J021 AB04 BA07 DB04 FA00 FA02 JA06  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Koshiro 5-10-23 Higashiiwatsuki, Iwatsuki City, Saitama Prefecture (72) Inventor Takeshi Hiraguri 131 Shiraraizuka 131, Shimohiratsuka, Tsukuba City, Ibaraki Prefecture 11 (72) Inventor Kazuhiro Hirasawa Ibaraki 1-10-12-2-403, Akumabo, Tsukuba-shi, Fukushima F-term (reference) 5J021 AB04 BA07 DB04 FA00 FA02 JA06

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 グランド板、ループ状ワイヤー、モノポ
ール、給電部を備えたループアンテナにおいて、グラン
ド板の一方の面にはモノポールとループ状ワイヤーが設
けられ、前記ループ状ワイヤーはグランド板に対して平
行なループ状部とループの一個所を切り取るように折り
曲げた2本の直線部を有し、前記2本の直線部は前記モ
ノポールに間隔をとって平行に設けられ、前記2本の直
線部の端部とグランド板の間に偏波切替えスイッチが挿
入され、モノポールとグランド板に給電線を接続してい
ることを特徴とする偏波切替えループアンテナ。
1. A loop antenna comprising a ground plate, a loop-shaped wire, a monopole, and a feeder, wherein a monopole and a loop-shaped wire are provided on one surface of the ground plate, and the loop-shaped wire is connected to the ground plate. It has a loop-shaped part parallel to it and two straight parts bent so as to cut out one part of the loop, and the two straight parts are provided in parallel with the monopole at intervals. A polarization switching switch is inserted between the end of the linear portion and the ground plate, and a feeder is connected to the monopole and the ground plate.
【請求項2】 偏波切替えスイッチが、手動または電子
的手段であることを特徴とする請求項1記載の偏波切替
えループアンテナ。
2. The polarization switching loop antenna according to claim 1, wherein the polarization switching switch is manual or electronic means.
JP10241628A 1998-08-27 1998-08-27 Polarization switching loop antenna Pending JP2000077934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10241628A JP2000077934A (en) 1998-08-27 1998-08-27 Polarization switching loop antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10241628A JP2000077934A (en) 1998-08-27 1998-08-27 Polarization switching loop antenna

Publications (1)

Publication Number Publication Date
JP2000077934A true JP2000077934A (en) 2000-03-14

Family

ID=17077158

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10241628A Pending JP2000077934A (en) 1998-08-27 1998-08-27 Polarization switching loop antenna

Country Status (1)

Country Link
JP (1) JP2000077934A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271128A (en) * 2001-03-13 2002-09-20 Sansei Denki Kk Simple high-gain planar antenna and method for constituting the same, and wireless lan
JP2005236656A (en) * 2004-02-19 2005-09-02 Fujitsu Ten Ltd Circular polarization antenna
WO2006046714A1 (en) * 2004-10-28 2006-05-04 Matsushita Electric Industrial Co., Ltd. Portable telephone with broadcast receiver
WO2007049193A1 (en) * 2005-10-26 2007-05-03 Nxp B.V. Uhf/vhf planar antenna device, notably for portable electronic equipment
JP2008283626A (en) * 2007-05-14 2008-11-20 Nec Saitama Ltd Circularly polarized plane switching type gps antenna
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WO2009111759A1 (en) * 2008-03-06 2009-09-11 Qualcomm Incorporated Methods and apparatus for supporting communications using a first polarization direction electrical antenna and a second polarization direction magnetic antenna
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US7777688B2 (en) 2004-12-16 2010-08-17 Panasonic Corporation Polarization switching antenna device
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US8024003B2 (en) 2008-03-06 2011-09-20 Qualcomm Incorporated Methods and apparatus for supporting communications using antennas associated with different polarization directions
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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002271128A (en) * 2001-03-13 2002-09-20 Sansei Denki Kk Simple high-gain planar antenna and method for constituting the same, and wireless lan
JP2005236656A (en) * 2004-02-19 2005-09-02 Fujitsu Ten Ltd Circular polarization antenna
WO2006046714A1 (en) * 2004-10-28 2006-05-04 Matsushita Electric Industrial Co., Ltd. Portable telephone with broadcast receiver
JPWO2006046714A1 (en) * 2004-10-28 2008-05-22 松下電器産業株式会社 Mobile phone with broadcast receiver
US7787922B2 (en) 2004-10-28 2010-08-31 Panasonic Corporation Portable telephone with broadcast receiver
US7777688B2 (en) 2004-12-16 2010-08-17 Panasonic Corporation Polarization switching antenna device
US7969373B2 (en) 2005-10-26 2011-06-28 Nxp B.V. UHF/VHF planar antenna device, notably for portable electronic equipment
WO2007049193A1 (en) * 2005-10-26 2007-05-03 Nxp B.V. Uhf/vhf planar antenna device, notably for portable electronic equipment
JP2008283626A (en) * 2007-05-14 2008-11-20 Nec Saitama Ltd Circularly polarized plane switching type gps antenna
EP2178157A4 (en) * 2007-08-03 2011-05-18 Panasonic Corp Antenna device
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US8242963B2 (en) 2007-08-03 2012-08-14 Panasonic Corporation Antenna device
EP2034557A2 (en) 2007-09-06 2009-03-11 Delphi Delco Electronics Europe GmbH Antenna for satellite reception
US7936309B2 (en) 2007-09-06 2011-05-03 Delphi Delco Electronics Europe Gmbh Antenna for satellite reception
EP2034557A3 (en) * 2007-09-06 2009-10-28 Delphi Delco Electronics Europe GmbH Antenna for satellite reception
US8024003B2 (en) 2008-03-06 2011-09-20 Qualcomm Incorporated Methods and apparatus for supporting communications using antennas associated with different polarization directions
US8326249B2 (en) 2008-03-06 2012-12-04 Qualcomm Incorporated Methods and apparatus for supporting communications using a first polarization direction electrical antenna and a second polarization direction magnetic antenna
WO2009111759A1 (en) * 2008-03-06 2009-09-11 Qualcomm Incorporated Methods and apparatus for supporting communications using a first polarization direction electrical antenna and a second polarization direction magnetic antenna
JP2010081271A (en) * 2008-09-25 2010-04-08 Panasonic Electric Works Co Ltd Antenna device
US8537063B2 (en) 2009-03-03 2013-09-17 Delphi Delco Electronics Europe Gmbh Antenna for reception of satellite radio signals emitted circularly, in a direction of rotation of the polarization
EP2226895A3 (en) * 2009-03-03 2010-12-15 Delphi Delco Electronics Europe GmbH Antenna for receiving satellite radio signals emitted circularly in a polarisation direction
JP2010233077A (en) * 2009-03-27 2010-10-14 Brother Ind Ltd Loop antenna unit
EP2234206A1 (en) 2009-03-27 2010-09-29 Brother Kogyo Kabushiki Kaisha Loop antenna unit
JP2013545358A (en) * 2010-10-15 2013-12-19 マイクロソフト コーポレーション LTE antenna pair for MIMO / diversity operation in LTE / GSM band
US9461365B2 (en) 2010-10-15 2016-10-04 Microsoft Technology Licensing, Llc LTE antenna pair for MIMO/diversity operation in the LTE/GSM bands
CN112216962A (en) * 2020-08-28 2021-01-12 西安电子科技大学 Frequency-adjustable grounding loop antenna working mode
CN115084867A (en) * 2022-07-19 2022-09-20 荣耀终端有限公司 Antenna switching method and terminal antenna

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