JP2007082110A - Circularly polarized wave antenna apparatus - Google Patents

Circularly polarized wave antenna apparatus Download PDF

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JP2007082110A
JP2007082110A JP2005270503A JP2005270503A JP2007082110A JP 2007082110 A JP2007082110 A JP 2007082110A JP 2005270503 A JP2005270503 A JP 2005270503A JP 2005270503 A JP2005270503 A JP 2005270503A JP 2007082110 A JP2007082110 A JP 2007082110A
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circularly polarized
feed line
branch feed
branch
axial ratio
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Kiyoshi Koike
清志 小池
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a circularly polarized wave antenna apparatus of a two point feeding method that has high versatility wherein the axial ratio can be corrected inexpensively and simply. <P>SOLUTION: In the circularly polarized wave antenna, first and second branched feed lines 5 and 6 are branched from a signal distribution part 4a of a feed line 4 into two ways to be connected to feed points P1 and P2 of a radiation conductor 3. A pair of correction part mounting parts 5b facing separated by a predetermined interval is previously formed on one of the first branched feed lines 5, constituting a 90-degree phase difference circuit. When the axial ratio of the circularly polarized wave radiated from the radiation conductor 3 is corrected, an electrical length is changed, by connecting a chip inductor 10 to the first branched feed line 5, in parallel with the correction parts mounting part 5b as soldering land. Furthermore, when correction of the axial ratio becomes unnecessary, the apparatus is used without arranging the chip inductor at the branched feed line5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は２点給電方式の円偏波アンテナ装置に係り、特に、軸比の補正に好適な円偏波アンテナ装置に関する。   The present invention relates to a two-point feed type circularly polarized antenna device, and more particularly to a circularly polarized antenna device suitable for correcting an axial ratio.

２点給電方式の円偏波アンテナ装置は、電気長が異なる２本の分岐給電線路を介して放射導体の異なる給電点に給電することにより、空間的に直交して位相が９０度ずれた二つのモードを励振させるというものであり、放射導体からは各モードに対応する直線偏波が放射されるため、実質的に円偏波の放射と見なすことができる。ここで、電気長が異なる２本の分岐給電線路は９０度位相差回路を構成しており、使用周波数の波長をλとしたとき、一方の分岐給電線路の電気長を他方の分岐給電線路の電気長よりもλ／４だけ長く設定しておけば、これら２本の分岐給電線路の結合部（信号分配部）に供給された同相の給電信号に９０度の位相差を生じさせて各給電点に給電することが可能となる。   A two-point feed type circularly polarized antenna device feeds two feed feed points with different radiation lengths via two branch feed lines with different electrical lengths, so that two phases with a phase difference of 90 degrees are spatially orthogonal to each other. One mode is excited, and since linearly polarized waves corresponding to each mode are radiated from the radiation conductor, it can be regarded as substantially circularly polarized radiation. Here, the two branch feed lines having different electrical lengths constitute a 90-degree phase difference circuit, and when the wavelength of the operating frequency is λ, the electrical length of one branch feed line is set to that of the other branch feed line. If it is set longer than the electrical length by λ / 4, a phase difference of 90 degrees is generated in the in-phase power supply signal supplied to the coupling part (signal distribution part) of these two branch power supply lines, and each power supply It becomes possible to supply power to the point.

このような２点給電方式の円偏波アンテナ装置においては、正方形状や円形状の放射導体を接地導体に対して略平行に配置すると共に、この放射導体の２箇所の給電点に接続された２本の分岐給電線路をマイクロストリップラインによって形成することが多い。また、放射導体から放射される円偏波の軸比を向上させるために、分岐給電線路のパターン形状を変更するなどしてインピーダンスを調整することにより電気長の修正を行うという技術が、従来より知られている（例えば、特許文献１参照）。すなわち、９０度位相差回路を構成する分岐給電線路のパターン幅や長さを変えたり、分岐給電線路に遅延線路を追加したり、分岐給電線路にチップ部品を直列に接続して給電点との間の容量値を変化させることによって、最適な軸比が得られるように分岐給電線路の電気長を修正することができる。
特開２００３−２９８３４２号公報（第３−４頁、図３） In such a two-point feeding type circularly polarized antenna device, a square or circular radiating conductor is arranged substantially parallel to the ground conductor, and is connected to two feeding points of the radiating conductor. In many cases, two branch feed lines are formed by microstrip lines. In addition, in order to improve the axial ratio of the circularly polarized wave radiated from the radiation conductor, a technique for correcting the electrical length by adjusting the impedance by changing the pattern shape of the branch feed line has been conventionally used. It is known (see, for example, Patent Document 1). That is, the pattern width and length of the branch feed line constituting the 90-degree phase difference circuit is changed, a delay line is added to the branch feed line, or chip parts are connected in series to the branch feed line to By changing the capacitance value between them, the electrical length of the branch feed line can be corrected so as to obtain an optimum axial ratio.
JP 2003-298342 A (page 3-4, FIG. 3)

ところで、この種の円偏波アンテナ装置を車両等に装着する際には専用の取付金具（ブラケット）が用いられるが、こうしたブラケットはアンテナのグラウンドとして動作するので、ブラケットの大きさや形状が円偏波の軸比に影響を及ぼしやすい。そのため、適用されるブラケットの種類に応じて予め軸比の補正を行っておかないと、円偏波アンテナ装置を装着した段階で軸比特性が劣化してしまう虞がある。また、この種の円偏波アンテナ装置において、軸比を補正するために放射導体のパターン形状を変更しようとすると、極めて煩雑な作業を余儀なくされてしまうので、９０度位相差回路を構成する分岐給電線路の電気長を修正して軸比補正を行ったほうがコスト面で有利である。しかしながら、前述した従来技術では、分岐給電線路の電気長を修正するために、そのパターン幅や長さを変えたり、遅延線路を追加したパターン形状に変更したり、あるいはチップ部品が直列接続できるようにパターン形状を変更していたので、いずれの手法を選択しても印刷用のマスクを別途作製して分岐給電線路を作り直さなければならない。つまり、分岐給電線路の電気長を修正するためにパターン形状の変更を行うと、必然的に相応の費用が嵩むため、必ずしも安価かつ簡便に軸比の補正が行えるわけではなかった。   By the way, when this type of circularly polarized antenna device is mounted on a vehicle or the like, a dedicated mounting bracket (bracket) is used. However, since such a bracket operates as the ground of the antenna, the size and shape of the bracket are not circular. It is easy to influence the axial ratio of waves. Therefore, if the axial ratio is not corrected in advance according to the type of bracket to be applied, the axial ratio characteristic may be deteriorated at the stage where the circularly polarized antenna device is mounted. In this type of circularly polarized antenna device, if the pattern shape of the radiating conductor is changed in order to correct the axial ratio, an extremely complicated operation is required, so that the branch that forms the 90-degree phase difference circuit is required. It is advantageous in terms of cost to correct the axial length by correcting the electrical length of the feed line. However, in the above-described prior art, in order to correct the electrical length of the branch feeding line, the pattern width and length are changed, the pattern shape is changed by adding a delay line, or chip parts can be connected in series. Since the pattern shape has been changed, a printing mask must be separately prepared and the branch feed line must be recreated regardless of which method is selected. That is, if the pattern shape is changed in order to correct the electrical length of the branch feed line, the corresponding cost is inevitably increased, so that the correction of the axial ratio is not always cheap and simple.

本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、軸比の補正が安価かつ簡便に行えて汎用性に富む２点給電方式の円偏波アンテナ装置を提供することにある。   The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a two-point feed type circularly polarized antenna device that can perform axial ratio correction inexpensively and easily and is versatile. There is to do.

上記の目的を達成するため、本発明の円偏波アンテナ装置では、接地導体に所定間隔を存して面対向された放射導体と、給電線路の信号分配部から二股に分岐して延出する第１および第２の分岐給電線路とを備え、これら第１および第２の分岐給電線路を９０度の位相差が生じるように互いに異なる電気長に設定して前記放射導体の異なる給電点に接続すると共に、電気長が長い方の前記第１の分岐給電線路に所定間隔を存して対向する一対の補正部品搭載部を形成し、これら補正部品搭載部を半田ランドとしてチップインダクタを前記第１の分岐給電線路に並列に接続して電気長を変更するようにした。   In order to achieve the above object, in the circularly polarized wave antenna device of the present invention, the radiation conductor facing the ground conductor at a predetermined interval and the signal distribution part of the feed line branch off and extend. First and second branch feed lines, and the first and second branch feed lines are connected to different feed points of the radiation conductor by setting different electrical lengths so that a phase difference of 90 degrees occurs. At the same time, a pair of correction component mounting portions facing each other with a predetermined interval is formed on the first branch feeder line having the longer electrical length, and the chip inductor is formed in the first inductor by using these correction component mounting portions as solder lands. The electrical length was changed by connecting to the branch feeder line in parallel.

このように構成された円偏波アンテナ装置は、９０度位相差回路を構成する第１および第２の分岐給電線路の電気長を修正することによって円偏波の軸比補正が行えるが、電気長が相対的に長い第１の分岐給電線路に所定間隔を存して対向する一対の補正部品搭載部を予め形成しておき、円偏波の軸比を補正するために第１の分岐給電線路の電気長を若干量延ばす必要が生じた場合には、補正部品搭載部を半田ランドとして第１の分岐給電線路に適宜インダクタンスのチップインダクタを並列に接続すれば、簡単に第１の分岐給電線路の電気長を修正して軸比を補正することができる。また、軸比の補正が不要な場合には、第１の分岐給電線路にチップインダクタを付設することなくそのまま使用すればよいので、結局、いずれの場合にも分岐給電線路のパターン形状を変更しなくて済む。したがって、この円偏波アンテナ装置は、取付金具（ブラケット）の大きさや形状に応じて、安価かつ簡便に軸比を補正することができる。   The circularly polarized antenna device thus configured can correct the axial ratio of circularly polarized waves by correcting the electrical lengths of the first and second branch feed lines constituting the 90-degree phase difference circuit. In order to correct the axial ratio of the circularly polarized wave, a pair of correction component mounting portions that are opposed to the first branch feed line having a relatively long length with a predetermined interval are formed in advance. If it is necessary to slightly increase the electrical length of the line, the first branch feed can be easily achieved by connecting a chip inductor having an appropriate inductance in parallel to the first branch feed line using the correction component mounting portion as a solder land. The axial ratio can be corrected by correcting the electrical length of the track. In addition, when correction of the axial ratio is not necessary, the first branch feed line can be used as it is without attaching a chip inductor. Therefore, in any case, the pattern shape of the branch feed line is changed. No need. Therefore, this circularly polarized antenna device can correct the axial ratio inexpensively and easily according to the size and shape of the mounting bracket (bracket).

上記の構成において、チップインダクタの両端部（電極部）が搭載可能な補正部品搭載部は第１の分岐給電線路の任意位置に形成できるが、電気長が相対的に長い第１の分岐給電線路には略平行に延びるパターンを形成しやすいため、これらパターンに記補正部品搭載部を突出形成することが好ましい。   In the above configuration, the correction component mounting portion on which both end portions (electrode portions) of the chip inductor can be mounted can be formed at an arbitrary position of the first branch feed line, but the first branch feed line having a relatively long electrical length. Since it is easy to form patterns extending substantially in parallel with each other, it is preferable to project the correction component mounting portion in these patterns.

なお、電気長が相対的に短い方の第２の分岐給電線路にも同様の補正部品搭載部を形成しておけば、円偏波の軸比を補正するために第２の分岐給電線路の電気長を若干量延ばす必要が生じた場合にも、簡単に第２の分岐給電線路の電気長を修正して軸比を補正することができる。したがって、９０度位相差回路を構成する第１および第２の分岐給電線路のいずれの電気長でも修正できるようになって軸比の補正方法が多様になる。   In addition, if the same correction component mounting part is formed also in the second branch feed line having a relatively short electrical length, the second branch feed line is corrected in order to correct the axial ratio of the circularly polarized wave. Even when it is necessary to slightly increase the electrical length, the electrical ratio of the second branch feed line can be easily corrected to correct the axial ratio. Accordingly, it becomes possible to correct any of the electrical lengths of the first and second branch feed lines constituting the 90-degree phase difference circuit, and various methods for correcting the axial ratio are obtained.

本発明の円偏波アンテナ装置は、９０度位相差回路を構成する一対の分岐給電線路のうち、電気長が長い方の分岐給電線路に予め所定間隔を存して対向する一対の補正部品搭載部が形成されており、これら補正部品搭載部を半田ランドとして適宜インダクタンスのチップインダクタを該分岐給電線路に並列に接続すれば円偏波の軸比が補正可能であると共に、軸比の補正が不要な場合には該分岐給電線路にチップインダクタを追加することなくそのまま使用することができるので、いずれの場合にも分岐給電線路のパターン形状を変更しなくて済む。したがって、取付金具（ブラケット）の大きさや形状に応じて安価かつ簡便に軸比を補正することが可能となり、汎用性に富む円偏波アンテナ装置が得られる。   The circularly polarized wave antenna device of the present invention is equipped with a pair of correction components that are opposed to a branch feed line having a longer electrical length, with a predetermined interval, between a pair of branch feed lines constituting a 90-degree phase difference circuit. If the correction component mounting part is used as a solder land and a chip inductor having an appropriate inductance is connected in parallel to the branch feed line, the axial ratio of the circularly polarized wave can be corrected and the correction of the axial ratio can be performed. If it is not necessary, it can be used as it is without adding a chip inductor to the branch feed line. Therefore, in any case, it is not necessary to change the pattern shape of the branch feed line. Therefore, the axial ratio can be corrected inexpensively and easily according to the size and shape of the mounting bracket (bracket), and a versatile circularly polarized antenna device can be obtained.

発明の実施の形態を図面を参照して説明すると、図１は本発明の第１実施形態例に係る円偏波アンテナ装置の平面図、図２は該アンテナ装置にチップインダクタを付設して軸比補正を行った場合の平面図である。   An embodiment of the invention will be described with reference to the drawings. FIG. 1 is a plan view of a circularly polarized antenna device according to a first embodiment of the present invention, and FIG. 2 is a shaft with a chip inductor attached to the antenna device. It is a top view at the time of performing ratio correction.

図１に示す円偏波アンテナ装置１は、誘電体基板２の上面に放射導体３と給電線路４，５，６とを設け、かつ、誘電体基板２の下面のほぼ全面に図示せぬ接地導体を設けて概略構成される２点給電方式の円偏波パッチアンテナである。放射導体３は正方形状に形成されており、その隣接する２辺の中央がそれぞれ給電点Ｐ１，Ｐ２となっている。給電線路４は図示せぬ電子回路部から導出されたマイクロストリップラインであって、この給電線路４の信号分配部４ａから第１および第２の分岐給電線路５，６が二股状に分岐して放射導体３の給電点Ｐ１，Ｐ２まで延出している。これら第１および第２の分岐給電線路５，６は９０度位相差回路を構成しており、給電点Ｐ１に接続されている第１の分岐給電線路５の電気長が、給電点Ｐ２に接続されている第２の分岐給電線路６の電気長よりも約λ／４（ただしλは使用周波数の波長）だけ長くなるように設定されている。したがって、給電線路４の信号分配部４ａに供給された同相の給電信号は、第１および第２の分岐給電線路５，６に分配されて９０度の位相差を生じたうえで各給電点Ｐ１，Ｐ２に給電されることになる。つまり、給電点Ｐ１には給電点Ｐ２よりも位相が９０度遅れた給電信号が供給されることになるので、空間的に直交して位相が９０度ずれた二つのモードに対応する直線偏波を放射導体３から放射させて円偏波アンテナとして動作させることができる。   A circularly polarized wave antenna device 1 shown in FIG. 1 is provided with a radiation conductor 3 and feed lines 4, 5, 6 on the upper surface of a dielectric substrate 2, and a grounding (not shown) on almost the entire lower surface of the dielectric substrate 2. This is a circularly polarized patch antenna of a two-point feeding system that is generally configured by providing a conductor. The radiation conductor 3 is formed in a square shape, and the centers of two adjacent sides thereof are feeding points P1 and P2, respectively. The feed line 4 is a microstrip line derived from an electronic circuit unit (not shown), and the first and second branch feed lines 5 and 6 branch from the signal distribution unit 4a of the feed line 4 into a bifurcated shape. The radiating conductor 3 extends to the feeding points P1 and P2. The first and second branch feed lines 5 and 6 constitute a 90-degree phase difference circuit, and the electrical length of the first branch feed line 5 connected to the feed point P1 is connected to the feed point P2. It is set so as to be longer by about λ / 4 (where λ is the wavelength of the used frequency) than the electrical length of the second branch feeder line 6. Therefore, the in-phase power supply signal supplied to the signal distribution unit 4a of the power supply line 4 is distributed to the first and second branch power supply lines 5 and 6 to generate a phase difference of 90 degrees, and then each power supply point P1. , P2 is fed. That is, since a feed signal whose phase is delayed by 90 degrees relative to the feed point P2 is supplied to the feed point P1, linearly polarized waves corresponding to two modes that are spatially orthogonal and 90 degrees out of phase. Can be radiated from the radiation conductor 3 and operated as a circularly polarized antenna.

この円偏波アンテナ装置１の第１および第２の分岐給電線路５，６のうち、電気長が相対的に長い第１の分岐給電線路５の一部はＵ字状に引き回されたパターン形状となっており、このＵ字状パターン５ａの略平行な部分にそれぞれ、チップインダクタ用の半田ランドとして使用可能な補正部品搭載部５ｂが形成されている。図２に示すように、これら一対の補正部品搭載部５ｂはチップインダクタ１０の両端部（電極部）が搭載できるように所定の間隔を存して対向しており、第１の分岐給電線路５の電気長を若干量延ばす必要が生じた場合には、一対の補正部品搭載部５ｂ上にチップインダクタ１０の両端部を半田付けするだけで、このチップインダクタ１０が第１の分岐給電線路５に並列接続されるため、給電信号の位相を遅らせることができる。   Of the first and second branch feed lines 5 and 6 of the circularly polarized antenna device 1, a pattern in which a part of the first branch feed line 5 having a relatively long electrical length is routed in a U-shape. A correction component mounting portion 5b that can be used as a solder land for a chip inductor is formed in a substantially parallel portion of the U-shaped pattern 5a. As shown in FIG. 2, the pair of correction component mounting portions 5b are opposed to each other with a predetermined interval so that both end portions (electrode portions) of the chip inductor 10 can be mounted. When it is necessary to slightly increase the electrical length of the chip inductor 10, the chip inductor 10 is connected to the first branch feed line 5 only by soldering both ends of the chip inductor 10 on the pair of correction component mounting portions 5 b. Since they are connected in parallel, the phase of the feed signal can be delayed.

上記の如くに構成される円偏波アンテナ装置１は、必要に応じて適宜インダクタンスのチップインダクタ１０が第１の分岐給電線路５に並列接続できるようになっているので、このアンテナ装置１を車両等に装着する際に用いられる取付金具（ブラケット）の種類に応じて、円偏波の軸比を容易に補正することができる。すなわち、適用される見込みが最も高いブラケットＡを想定して第１および第２の分岐給電線路５，６のパターン形状が設計されており、このブラケットＡを用いてアンテナ装置１が装着される場合には、図１に示すように、第１の分岐給電線路５にチップインダクタを付設しない状態で使用することにより、最適な軸比が得られるようになっている。また、ブラケットＡとは大きさや形状が異なる別のブラケットＢを用いてアンテナ装置１が装着される場合には、図２に示すように、チップインダクタ１０を第１の分岐給電線路５に付設した状態で使用することにより、第１の分岐給電線路５の電気長を修正して最適な軸比に補正できるようになっている。同様に、両ブラケットＡ，Ｂと大きさや形状が異なるさらに別のブラケットを用いてアンテナ装置１が装着される場合には、第１の分岐給電線路５に付設するチップインダクタ１０のインダクタンスを適宜選択することによって最適な軸比に補正することが可能である。   The circularly polarized antenna device 1 configured as described above is configured such that a chip inductor 10 having an appropriate inductance can be connected in parallel to the first branch feed line 5 as necessary. The axial ratio of circularly polarized waves can be easily corrected in accordance with the type of mounting bracket (bracket) used when mounting to the like. That is, the pattern shape of the first and second branch feed lines 5 and 6 is designed assuming the bracket A most likely to be applied, and the antenna device 1 is mounted using the bracket A. As shown in FIG. 1, an optimum axial ratio can be obtained by using the first branch feed line 5 without a chip inductor. When the antenna device 1 is mounted using a different bracket B having a different size and shape from the bracket A, a chip inductor 10 is attached to the first branch feed line 5 as shown in FIG. When used in a state, the electrical length of the first branch feed line 5 can be corrected and corrected to an optimum axial ratio. Similarly, when the antenna device 1 is mounted using another bracket having a different size and shape from the brackets A and B, the inductance of the chip inductor 10 attached to the first branch feed line 5 is appropriately selected. By doing so, it is possible to correct to an optimum axial ratio.

このように本実施形態例に係る２点給電方式の円偏波アンテナ装置１は、大きさや形状が異なる複数種類のブラケットに応じて円偏波の軸比補正を行うにあたって、９０度位相差回路を構成する第１および第２の分岐給電線路５，６のうち、電気長が相対的に長い方の第１の分岐給電線路５の電気長を延ばす必要が生じた際に、補正部品搭載部５ｂ上に適宜インダクタンスのチップインダクタ１０を半田付けするだけで対応でき、この第１の分岐給電線路５のパターン形状を何ら変更する必要がない。つまり、安価かつ簡便に軸比を補正することができると共に、第１の分岐給電線路５にチップインダクタを付設しない状態でも使用できるため、この円偏波アンテナ装置１は複数種類のブラケットに容易に対応できる汎用性を備えている。なお、電気長が比較的長い第１の分岐給電線路５は、その一部に略平行に延びるパターンが形成しやすいため、所定の間隔を存して対向する補正部品搭載部５ｂを容易に形成することができ、補正部品搭載部５ｂによって第１の分岐給電線路５のパターン形状が複雑化することはない。   As described above, the two-point feed type circularly polarized antenna device 1 according to the present embodiment has a 90-degree phase difference circuit for correcting the axial ratio of circularly polarized waves according to a plurality of types of brackets having different sizes and shapes. When it is necessary to extend the electrical length of the first branch feed line 5 having a relatively long electrical length among the first and second branch feed lines 5 and 6 constituting the correction component mounting portion This can be dealt with by simply soldering a chip inductor 10 having an appropriate inductance on 5b, and there is no need to change the pattern shape of the first branch feed line 5 at all. In other words, the axial ratio can be corrected inexpensively and easily, and it can be used even without a chip inductor attached to the first branch feed line 5, so that this circularly polarized antenna device 1 can be easily mounted on a plurality of types of brackets. Versatile enough to handle. The first branch feed line 5 having a relatively long electrical length can easily form a pattern extending substantially parallel to a part of the first branch feed line 5, so that the correction component mounting portions 5 b facing each other with a predetermined interval can be easily formed. The correction component mounting portion 5b does not complicate the pattern shape of the first branch feed line 5.

図３は本発明の第２実施形態例に係る円偏波アンテナ装置の平面図であり、図１と対応する部分には同一符号が付してあるため重複する説明は省略する。   FIG. 3 is a plan view of the circularly polarized antenna device according to the second embodiment of the present invention, and the same reference numerals are given to portions corresponding to those in FIG.

図３に示す円偏波アンテナ装置１１は、９０度位相差回路を構成する一方の第１の分岐給電線路５に補正部品搭載部５ｂを形成するだけでなく、他方の第２の分岐給電線路６にも同様の補正部品搭載部６ｂを形成した点が、前述した第１実施形態例と大きく異なっている。この補正部品搭載部６ｂは、第２の分岐給電線路６のＵ字状パターン６ａの略平行な部分にそれぞれチップインダクタ用の半田ランドとして形成されており、円偏波の軸比を補正するために第２の分岐給電線路６の電気長を若干量延ばす必要が生じた際には、補正部品搭載部６ｂ上に適宜インダクタンスのチップインダクタ１０を半田付けするだけで対応できるので、第２の分岐給電線路６のパターン形状を変更する必要がなくなる。この第２実施形態例においては、第１実施形態例に比べて第２の分岐給電線路６のパターン形状が複雑化してしまうが、９０度位相差回路を構成する第１および第２の分岐給電線路５，６のいずれの電気長でも修正できるため、軸比の補正方法が多様になって極めて汎用性に富む円偏波アンテナ装置１１が得られる。   The circularly polarized wave antenna device 11 shown in FIG. 3 not only forms the correction component mounting portion 5b in one first branch feed line 5 constituting a 90-degree phase difference circuit but also the other second branch feed line. 6 is greatly different from the above-described first embodiment in that the same correction component mounting portion 6b is formed. The correction component mounting portion 6b is formed as a solder land for a chip inductor in a substantially parallel portion of the U-shaped pattern 6a of the second branch feed line 6 to correct the axial ratio of circularly polarized waves. If the electrical length of the second branch feed line 6 needs to be slightly increased, it can be dealt with by simply soldering the chip inductor 10 having an inductance on the correction component mounting portion 6b. It is not necessary to change the pattern shape of the feeder line 6. In the second embodiment, the pattern shape of the second branch feed line 6 is complicated as compared with the first embodiment, but the first and second branch feeds constituting the 90-degree phase difference circuit. Since the electrical length of any of the lines 5 and 6 can be corrected, the method for correcting the axial ratio is diversified, and the circularly polarized antenna device 11 having a great versatility can be obtained.

図４は本発明の第３実施形態例に係る円偏波アンテナ装置の要部底面図であり、図１と対応する部分には同一符号が付してあるため重複する説明は省略する。   FIG. 4 is a bottom view of an essential part of the circularly polarized antenna device according to the third embodiment of the present invention, and the same reference numerals are given to portions corresponding to those in FIG.

図４に示す円偏波アンテナ装置２１は、９０度位相差回路を構成する第１および第２の分岐給電線路５，６を低雑音増幅回路等を有する回路基板７に形成し、この回路基板７のスルーホール８，９を介して第１および第２の分岐給電線路５，６を図示せぬ放射導体の対応する給電点に接続している点が、前述した第１実施形態例と大きく異なっている。   A circularly polarized antenna device 21 shown in FIG. 4 is formed by forming first and second branch feed lines 5 and 6 constituting a 90-degree phase difference circuit on a circuit board 7 having a low noise amplification circuit and the like. The first and second branch feed lines 5 and 6 are connected to the corresponding feed points of the radiation conductors (not shown) through the through holes 8 and 9 of FIG. Is different.

本発明の第１実施形態例に係る円偏波アンテナ装置の平面図である。1 is a plan view of a circularly polarized antenna device according to a first embodiment of the present invention. 該アンテナ装置にチップインダクタを付設して軸比補正を行った場合の平面図である。It is a top view at the time of attaching a chip inductor to this antenna device and performing axial ratio correction. 本発明の第２実施形態例に係る円偏波アンテナ装置の平面図である。It is a top view of the circularly polarized wave antenna device concerning the example of a 2nd embodiment of the present invention. 本発明の第３実施形態例に係る円偏波アンテナ装置の要部底面図である。It is a principal part bottom view of the circularly polarized wave antenna apparatus which concerns on the example of 3rd Embodiment of this invention.

符号の説明Explanation of symbols

１，１１，２１ 円偏波アンテナ装置
２ 誘電体基板
３ 放射導体
４ 給電線路
４ａ 信号分配部
５ 第１の分岐給電線路
６ 第２の分岐給電線路
５ａ，６ａ Ｕ字状パターン
５ｂ，６ｂ 補正部品搭載部
７ 回路基板
８，９ スルーホール
１０ チップインダクタ
Ｐ１，Ｐ２ 給電点 1,11,21 Circularly polarized antenna device 2 Dielectric substrate 3 Radiation conductor 4 Feed line 4a Signal distributor 5 First branch feed line 6 Second branch feed line 5a, 6a U-shaped pattern 5b, 6b Correction component Mounting part 7 Circuit board 8, 9 Through hole 10 Chip inductor P1, P2 Feed point

Claims (2)

接地導体に所定間隔を存して面対向された放射導体と、給電線路の信号分配部から二股に分岐して延出する第１および第２の分岐給電線路とを備え、これら第１および第２の分岐給電線路を９０度の位相差が生じるように互いに異なる電気長に設定して前記放射導体の異なる給電点に接続すると共に、電気長が長い方の前記第１の分岐給電線路に所定間隔を存して対向する一対の補正部品搭載部を形成し、これら補正部品搭載部を半田ランドとしてチップインダクタを前記第１の分岐給電線路に並列に接続して電気長を変更するようにしたことを特徴とする円偏波アンテナ装置。   A radiation conductor facing the ground conductor at a predetermined interval, and first and second branch feed lines extending in a bifurcated manner from the signal distribution portion of the feed line, the first and second The two branch feed lines are set to different electrical lengths so that a phase difference of 90 degrees is generated and connected to different feed points of the radiation conductor, and the first branch feed line having a longer electrical length is connected to a predetermined length. A pair of correction component mounting portions opposed to each other with a gap therebetween are formed, and the correction component mounting portions are used as solder lands, and a chip inductor is connected in parallel to the first branch feed line to change the electrical length. A circularly polarized antenna device. 請求項１の記載において、前記第１の分岐給電線路が略平行に延びるパターンを有し、これらパターンに前記補正部品搭載部を突出形成したことを特徴とする円偏波アンテナ装置。
2. The circularly polarized wave antenna device according to claim 1, wherein the first branch feed line has a pattern extending substantially in parallel, and the correction component mounting portion is formed to protrude in these patterns.
JP2005270503A 2005-09-16 2005-09-16 Circularly polarized wave antenna apparatus Withdrawn JP2007082110A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010074383A (en) * 2008-09-17 2010-04-02 Nippon Antenna Co Ltd Antenna device
KR101145842B1 (en) 2010-02-19 2012-05-17 주식회사 이엠따블유 Terminal for electronic toll colletction system
JP2016053811A (en) * 2014-09-03 2016-04-14 東芝テック株式会社 Ic tag reading device
CN112840510A (en) * 2018-10-12 2021-05-25 株式会社村田制作所 Antenna module and communication device having the same mounted thereon
US11063363B2 (en) 2018-09-07 2021-07-13 Murata Manufacturing Co., Ltd. Antenna element, antenna module, and communication device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010074383A (en) * 2008-09-17 2010-04-02 Nippon Antenna Co Ltd Antenna device
KR101145842B1 (en) 2010-02-19 2012-05-17 주식회사 이엠따블유 Terminal for electronic toll colletction system
JP2016053811A (en) * 2014-09-03 2016-04-14 東芝テック株式会社 Ic tag reading device
US11063363B2 (en) 2018-09-07 2021-07-13 Murata Manufacturing Co., Ltd. Antenna element, antenna module, and communication device
CN112840510A (en) * 2018-10-12 2021-05-25 株式会社村田制作所 Antenna module and communication device having the same mounted thereon
CN112840510B (en) * 2018-10-12 2024-03-08 株式会社村田制作所 Antenna module and communication device equipped with the same

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