JP2007036930A - Circularly-polarized wave patch antenna and circularly-polarized wave array antenna - Google Patents

Circularly-polarized wave patch antenna and circularly-polarized wave array antenna Download PDF

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JP2007036930A
JP2007036930A JP2005220092A JP2005220092A JP2007036930A JP 2007036930 A JP2007036930 A JP 2007036930A JP 2005220092 A JP2005220092 A JP 2005220092A JP 2005220092 A JP2005220092 A JP 2005220092A JP 2007036930 A JP2007036930 A JP 2007036930A
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circularly polarized
antenna
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patch antenna
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JP4562611B2 (en
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Takanori Noro
崇徳 野呂
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Japan Radio Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a circularly-polarized patch antenna(array antenna) whose axial ratio characteristics are turned to be a wide band, and whose gain is made relatively high in frequency range, where the antenna gain is wide, while adopting a method for supplying a power from one point of a power feeding element. <P>SOLUTION: One power feeding point 62 is arranged on a ground conductor plate 60, and a hexagon power feeding element 52 obtained by cutting two corners at one side of a rectangle and a rectangular passive element 54 are arranged on the same axis, and the axial ratio characteristics of a circularly-polarized wave patch antenna 50, obtained by making the angle of the rectangular passive element 54 coincide with the hexagon power feeding element 52, are turned into wide band. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、円偏波パッチアンテナ及び円偏波アレイアンテナに関し、一層詳細には、無給電素子付きの円偏波パッチアンテナ及び円偏波アレイアンテナに関する。   The present invention relates to a circularly polarized patch antenna and a circularly polarized array antenna, and more particularly to a circularly polarized patch antenna and a circularly polarized array antenna with a parasitic element.

パッチアンテナにより円偏波を放射する場合、第１に、給電素子に対して位置が９０゜異なる点から９０゜の位相差をつけて給電する、いわゆる２点給電円偏波パッチアンテナによる手法と、第２に、給電素子の一点から給電し放射素子に切り欠きを設ける、いわゆる１点給電円偏波パッチアンテナによる手法がある（特許文献１）。   When circularly polarized waves are radiated by a patch antenna, firstly, a method using a so-called two-point fed circularly polarized patch antenna that feeds a feeding element with a phase difference of 90 ° from a point that is 90 ° different from the position Second, there is a method using a so-called single-point feed circularly polarized patch antenna that feeds power from one point of the feed element and provides a notch in the radiating element (Patent Document 1).

第１の手法は、一般的に広い周波数帯域にわたり良好な円偏波を放射することができるが、１個の給電素子に対して２個の給電点を必要とする。また、アンテナ以外に９０゜位相差をつける給電回路を必要とする、という２つの理由により給電構造が複雑になるという問題がある。   The first method can generally radiate a good circularly polarized wave over a wide frequency band, but requires two feeding points for one feeding element. In addition, there is a problem that the feeding structure becomes complicated due to two reasons that a feeding circuit with a 90 ° phase difference is required in addition to the antenna.

第２の手法は、給電構造は比較的簡単であるが、アンテナの入力インピーダンスに依存して円偏波を放射する方式であるため、実用的な軸比の帯域が数％と狭くなるという問題がある。   The second method has a relatively simple feeding structure, but radiates circularly polarized waves depending on the input impedance of the antenna. Therefore, there is a problem that a practical axial ratio band is narrowed to several percent. There is.

図１０は、特許文献１の図６に記載された軸比帯域の狭い円偏波アレイアンテナ（０゜並列配列円偏波アレイアンテナともいう。）１０の構成を示している。この円偏波アレイアンテナ１０では、誘電体基板１２上に、切り欠きからなる縮退分離素子１４が対向する２角に設けられた給電素子１６が並列に設けられ、給電口１８に接続される給電線２０が給電素子１６の給電点２２に接続されている。   FIG. 10 shows the configuration of a circularly polarized array antenna (also referred to as a 0 ° parallel arrayed circularly polarized array antenna) 10 having a narrow axial ratio band described in FIG. In this circularly polarized array antenna 10, feed elements 16 provided in two corners on which a degenerate separation element 14 made of a notch is opposed are provided in parallel on a dielectric substrate 12 and connected to a feed port 18. The electric wire 20 is connected to the feeding point 22 of the feeding element 16.

図１１は、特許文献１の図１に記載された軸比帯域が広い範囲に改善された円偏波アレイアンテナ（９０゜直交並列円偏波アレイアンテナともいう。）３０の構成を示している。この円偏波アレイアンテナ３０では、誘電体基板１２上に、切り欠きからなる縮退分離素子１４が対向する２角に設けられた給電素子１６の片方を９０゜回転させて並列に設けており、給電口１８に接続される給電線２０が給電素子１６の給電点２２に接続されている。   FIG. 11 shows the configuration of a circularly polarized wave array antenna (also referred to as a 90 ° orthogonal parallel circularly polarized wave array antenna) 30 described in FIG. . In this circularly polarized wave array antenna 30, one of feed elements 16 provided at two opposite corners on a dielectric substrate 12 with degenerate separation elements 14 made of notches is rotated by 90 ° and provided in parallel. A feeding line 20 connected to the feeding port 18 is connected to a feeding point 22 of the feeding element 16.

図１２は、この出願の発明者により特許文献１に係る技術を追試した結果であって、これら２つの円偏波アレイアンテナ１０、３０に対して、素子間隔０．８［λ］での規格化周波数−アンテナ利得［ｄＢｉ］特性を示している。アンテナ利得特性２ｘ´は、図１０の円偏波アレイアンテナ１０に対応し、アンテナ利得特性２ｙ´は、図１１の円偏波アレイアンテナ３０に対応している。なお、上記特許文献１では、規格化中心周波数を、例えば２．４［ＧＨｚ］帯としているが、この明細書においては、中心周波数は、１．５９２［ＧＨｚ］｛波長λは、λ＝１８８［ｃｍ］｝としているので、図１２、図１３の規格化周波数「１」は、１．５９２［ＧＨｚ］に対応する。   FIG. 12 shows the results of further testing of the technique according to Patent Document 1 by the inventor of this application, and the standard with an element spacing of 0.8 [λ] for these two circularly polarized array antennas 10 and 30 is shown. Frequency-antenna gain [dBi] characteristics. The antenna gain characteristic 2x ′ corresponds to the circularly polarized array antenna 10 of FIG. 10, and the antenna gain characteristic 2y ′ corresponds to the circularly polarized array antenna 30 of FIG. In the above Patent Document 1, the standardized center frequency is, for example, 2.4 [GHz] band. However, in this specification, the center frequency is 1.592 [GHz] {wavelength λ is λ = 188. [Cm]}, the normalized frequency “1” in FIGS. 12 and 13 corresponds to 1.592 [GHz].

図１３は、素子間隔０．８［λ］での規格化周波数−軸比特性を示している。軸比特性２ｘは、図１０の円偏波アレイアンテナ１０に対応し、軸比特性２ｙは、図１１の円偏波アレイアンテナ３０に対応している。   FIG. 13 shows the normalized frequency-axis ratio characteristics when the element spacing is 0.8 [λ]. The axial ratio characteristic 2x corresponds to the circularly polarized array antenna 10 of FIG. 10, and the axial ratio characteristic 2y corresponds to the circularly polarized array antenna 30 of FIG.

このように、図１０の０゜並列配列の円偏波アレイアンテナ１０に比較して、図１１の９０゜直交並列配列の円偏波アレイアンテナ３０は、図１２に示したアンテナ利得特性２ｘ´、２ｙ´では、それほど差異はないが、図１３に示す軸比特性２ｙでは、軸比特性２ｘに比較して相当広範囲に改善されていることが分かる。   As described above, the circularly polarized array antenna 30 of 90 ° orthogonal parallel arrangement shown in FIG. 11 is different from the circularly polarized array antenna 10 of 0 ° parallel arrangement shown in FIG. 10 in the antenna gain characteristic 2x ′ shown in FIG. 2y ′ is not so different, but it can be seen that the axial ratio characteristic 2y shown in FIG. 13 is improved over a wide range compared to the axial ratio characteristic 2x.

特開２００４−１１２６５２号公報JP 2004-112652 A

しかしながら、図１１に示した円偏波アレイアンテナ３０を、図１４に示すように、素子単体の円偏波パッチアンテナ３０ｓとして使用する場合には、図１５に示すように、素子単体での軸比特性１ｙが狭帯域になってしまうという欠点がある。   However, when the circularly polarized array antenna 30 shown in FIG. 11 is used as a single circularly polarized patch antenna 30s as shown in FIG. 14, the axis of the single element as shown in FIG. There is a drawback that the specific characteristic 1y becomes a narrow band.

この発明はこのような課題を考慮してなされたものであり、給電素子の一点から給電する手法を取り入れながら、軸比特性が広帯域となり、かつアンテナ利得が広い周波数範囲で比較的に高利得である円偏波パッチアンテナ及び円偏波アレイアンテナを提供することを目的とする。   The present invention has been made in consideration of such a problem. While adopting a method of feeding power from one point of the feeding element, the axial ratio characteristic is wideband, and the antenna gain is relatively high in a wide frequency range. An object is to provide a circularly polarized patch antenna and a circularly polarized array antenna.

この発明に係る円偏波パッチアンテナは、直線偏波の１つの給電点の六角形給電素子と四角形無給電素子を同軸上に平行して配置する構成により、軸比特性が広帯域となり、かつアンテナ利得が広い周波数範囲で比較的に高利得になる。   The circularly polarized patch antenna according to the present invention has a configuration in which a hexagonal feeding element and a rectangular parasitic element at one feeding point of linearly polarized waves are arranged in parallel on the same axis, thereby providing a wide axial ratio characteristic and an antenna. Gain is relatively high over a wide frequency range.

この場合、前記六角形給電素子の対向する他方の２角の対角線と、前記四角形無給電素子の対角線とを一致させることで、製作が容易になる。   In this case, the other two diagonal lines of the hexagonal feeding element and the diagonal line of the square parasitic element are matched to facilitate manufacture.

前記六角形給電素子を形成する四角形と、前記四角形無給電素子は、それぞれ正方形であることが好ましい。   The quadrangle that forms the hexagonal feed element and the square parasitic element are preferably square.

この発明には、上述した円偏波パッチアンテナを複数含む円偏波アレイアンテナも含まれる。   The present invention also includes a circularly polarized array antenna including a plurality of the above circularly polarized patch antennas.

この発明によれば、給電素子の一点から給電する手法を取り入れながら、軸比特性が広帯域となり、かつアンテナ利得が広い周波数範囲で比較的に高利得になる円偏波パッチアンテナ及び円偏波アレイアンテナが得られる。   According to the present invention, a circularly polarized wave patch antenna and a circularly polarized wave array having a wide axial ratio characteristic and a relatively high gain in a wide frequency range while adopting a method of feeding from one point of the feeding element. An antenna is obtained.

以下、この発明の実施形態について図面を参照して説明する。なお、この実施形態で説明するアンテナの使用周波数帯は、３００［ＭＨｚ］〜３０［ＧＨｚ］のマイクロ波帯である。   Embodiments of the present invention will be described below with reference to the drawings. In addition, the use frequency band of the antenna described in this embodiment is a microwave band of 300 [MHz] to 30 [GHz].

図１は、この発明の一実施形態の１素子アンテナからなる円偏波パッチアンテナ５０の平面図である。   FIG. 1 is a plan view of a circularly polarized patch antenna 50 including a single element antenna according to an embodiment of the present invention.

図２は、１素子アンテナからなる円偏波パッチアンテナ５０の斜視図である。   FIG. 2 is a perspective view of a circularly polarized patch antenna 50 including a single element antenna.

この１素子アンテナからなる円偏波パッチアンテナ５０は、アルミニューム製の地導体板（地導体）６０上に、誘電体５１、５３を挟んでそれぞれ金属の給電素子５２と無給電素子５４が同軸上に重ねて平行に配置された、いわゆるスタック構成になっている。ここで、無給電素子５４は、八木アンテナにおける導波器と同様に動作するが、直線偏波を形成する。   In this circularly polarized patch antenna 50 formed of a single element antenna, a metal feeding element 52 and a parasitic element 54 are coaxially arranged on a ground conductor plate (ground conductor) 60 made of aluminum with dielectrics 51 and 53 interposed therebetween. It has a so-called stack configuration in which the upper layers are arranged in parallel. Here, the parasitic element 54 operates in the same manner as a director in a Yagi antenna, but forms a linearly polarized wave.

給電素子５２は、正方形の対向する一方の２角を、１つの給電点６２で直線偏波となるように同じ大きさ分切り落とし、縮退分離素子５６とした六角形形状とされ、一方、無給電素子５４の１辺の長さは、この六角形の中央の四角形部と略重なる大きさの正方形とされている。   The feeding element 52 is formed in a hexagonal shape by cutting off two opposite corners of the square by the same size so as to be linearly polarized at one feeding point 62, and forming a degenerate separation element 56. The length of one side of the element 54 is a square having a size that substantially overlaps the square portion at the center of the hexagon.

また、六角形の給電素子５２の対向する他方の２角の対角線ＤＬ６と、四角形の無給電素子５４の対角線ＤＬ４とを平面的に見て一致させて配置している。六角形の給電素子５２は、対角線ＤＬ６に対して対称な形状になっている。   Further, the other opposite diagonal line DL6 of the hexagonal feeding element 52 and the diagonal line DL4 of the square parasitic element 54 are arranged so as to coincide with each other in plan view. The hexagonal power feeding element 52 has a symmetrical shape with respect to the diagonal line DL6.

上記のように構成された円偏波パッチアンテナ５０は、円偏波特性を有する。   The circularly polarized patch antenna 50 configured as described above has circular polarization characteristics.

図１、図２に示すように、給電素子５２には、給電点６２が設けられている。給電点６２に対する給電方法は、第１にマイクロストリップ給電線で給電する。第２に地導体板６０の裏側から地導体板６０を貫通して給電する。第３に地導体板６０に開口窓を開け裏面から電磁給電する、という方法のいずれかを選択することができる。   As shown in FIGS. 1 and 2, the power feeding element 52 is provided with a power feeding point 62. As a feeding method for the feeding point 62, first, feeding is performed by a microstrip feeding line. Second, power is fed through the ground conductor plate 60 from the back side of the ground conductor plate 60. Thirdly, it is possible to select one of the methods of opening an opening window in the ground conductor plate 60 and supplying electromagnetic power from the back surface.

以上のように構成される円偏波パッチアンテナ５０では、六角形の一辺に形成された給電点６２から給電することで、対角線ＤＬ６（図１参照）と平行する方向ＤＲ６（図３参照）に直線偏波が形成されるような給電素子５２と、四角形の一辺に給電点を形成し、そこから給電をした場合、その給電点に近い辺側から他方の辺側に向かう方向ＤＲ４（図３参照）に直線偏波が形成されるような無給電素子５４を、図３に示すように同軸上に配置して、給電点６２から給電することで、全体として、円偏波アンテナとして動作する。換言すれば、図３に示す六角形の給電素子５２単体に給電した場合、及び四角形の無給電素子５４単体に六角形の給電素子５２と同様な給電点から給電した場合は、それぞれ図３に示すような偏波方向ＤＲ６、ＤＲ４を有する直線偏波が形成され、そのような特性を有する六角形の給電素子５２上に四角形の無給電素子５４を図３に示すように同軸上に配置し、六角形の給電素子５２の給電点６２から給電することで、全体として円偏波アンテナとして動作する。   In the circularly polarized patch antenna 50 configured as described above, power is fed from a feeding point 62 formed on one side of the hexagon, and thus in a direction DR6 (see FIG. 3) parallel to the diagonal line DL6 (see FIG. 1). When a feeding element 52 that forms a linearly polarized wave and a feeding point is formed on one side of the quadrilateral and feeding is performed therefrom, the direction DR4 from the side near the feeding point toward the other side DR4 (FIG. 3) As shown in FIG. 3, the parasitic element 54 that forms a linearly polarized wave is arranged on the same axis as shown in FIG. 3 and fed from the feeding point 62 to operate as a circularly polarized antenna as a whole. . In other words, when the hexagonal feeding element 52 shown in FIG. 3 is fed with power, and when the rectangular parasitic element 54 is fed from the feeding point similar to that of the hexagonal feeding element 52, FIG. A linearly polarized wave having the polarization directions DR6 and DR4 as shown is formed, and a rectangular parasitic element 54 is coaxially arranged on a hexagonal feeding element 52 having such characteristics as shown in FIG. By feeding from the feeding point 62 of the hexagonal feeding element 52, the whole operates as a circularly polarized antenna.

図４は、円偏波パッチアンテナ５０の給電素子５２の切り落とし量をパラメータとして変化させた場合の規格化周波数（ｆ／ｆ０）と軸比［ｄＢ］との関係を示している。   FIG. 4 shows the relationship between the normalized frequency (f / f0) and the axial ratio [dB] when the cut-off amount of the feed element 52 of the circularly polarized patch antenna 50 is changed as a parameter.

なお、図４において、各要素は、図５のように定義し、各値を設定している。   In FIG. 4, each element is defined as shown in FIG. 5, and each value is set.

給電素子５２の切り落としのない正方形の１辺の長さをａｌ１、その正方形の面積ａｌ１×ａｌ１をＳ、切り落とされた２つの三角形の面積をそれぞれΔＳ、無給電素子５４の正方形の１辺の長さをａｌ２、地導体板６０から給電素子５２までの距離（誘電体５１の厚み）をＴＬ（ＴＬ＝０．０４３λ０）、地導体板６０から無給電素子５４までの距離（誘電体５１＋給電素子５２＋誘電体５３の厚み）をＴＨ（ＴＨ＝０．０９６λ０）、中心周波数ｆ０の波長をλ０としている。なお、面積Ｓは、給電素子５２の切り落としのない正方形の面積である。   The length of one side of the square of the feeding element 52 that is not cut off is al1, the area of the square al1 × al1 is S, the area of the two cut-off triangles is ΔS, and the length of one side of the square of the parasitic element 54 is The distance from the ground conductor plate 60 to the feed element 52 (thickness of the dielectric 51) is TL (TL = 0.043λ0), and the distance from the ground conductor plate 60 to the parasitic element 54 (dielectric 51 + feed element) 52 + thickness of the dielectric 53) is TH (TH = 0.096λ0), and the wavelength of the center frequency f0 is λ0. Note that the area S is a square area where the feed element 52 is not cut off.

図４の軸比特性において、軸比３［ｄＢ］以下の軸比特性で帯域を評価すると、軸比特性１ｚ（ａｌ１＝０．４７λ０、ａｌ２＝０．３９λ０、ΔＳ／Ｓ＝１５．５［％］）が最も広帯域であり、次に、軸比特性１ｚａ（ａｌ１＝０．４７λ０、ａｌ２＝０．３９λ０、ΔＳ／Ｓ＝１１．４［％］）、軸比特性１ｚｂ（ａｌ１＝０．４７λ０、ａｌ２＝０．３９λ０、ΔＳ／Ｓ＝２０．２［％］）が広帯域であり、比較的に切欠量の多い軸比特性１ｚｃ（ａｌ１＝０．４７λ０、ａｌ２＝０．３９λ０、ΔＳ／Ｓ＝２５．６［％］）、比較的に切欠量の少ない軸比特性１ｚｄ（ａｌ１＝０．４７λ０、ａｌ２＝０．３９λ０、ΔＳ／Ｓ＝７．９［％］）は、軸比特性が不良であることが分かる。   In the axial ratio characteristic of FIG. 4, when the band is evaluated with an axial ratio characteristic of 3 [dB] or less, the axial ratio characteristic 1z (al1 = 0.47λ0, al2 = 0.39λ0, ΔS / S = 15.5 [ %]) Is the widest band, and then the axial ratio characteristic 1za (al1 = 0.47λ0, al2 = 0.39λ0, ΔS / S = 11.4 [%]), the axial ratio characteristic 1zb (al1 = 0. 47λ0, al2 = 0.39λ0, ΔS / S = 20.2 [%]) is a wide band and has a relatively large notch amount axial ratio characteristic 1zc (al1 = 0.47λ0, al2 = 0.39λ0, ΔS / S = 25.6 [%]), the axial ratio characteristic 1zd (al1 = 0.47λ0, al2 = 0.39λ0, ΔS / S = 7.9 [%]) with a relatively small notch amount is the axial ratio characteristic. It turns out that is bad.

図６は、給電素子５２及び無給電素子５４の材質を軸比特性１ｚ（図４参照）で示す銅（導電率：５．８×１０7）から、アルミ（３．８×１０7）、銀（６．１×１０7）、ステンレス（１．１×１０6）、鋳鉄（１．５×１０6）に変更した場合の軸比特性の変化の具合を示しているが、導電率が１×１０6〜１０×１０7程度の導体であれば、軸比特性に対して影響がほとんどないことが分かる。 FIG. 6 shows the material of the feeding element 52 and the parasitic element 54 from copper (conductivity: 5.8 × 10 7 ) having an axial ratio characteristic 1z (see FIG. 4), aluminum (3.8 × 10 7 ), The degree of change in the axial ratio characteristics when changing to silver (6.1 × 10 7 ), stainless steel (1.1 × 10 6 ), cast iron (1.5 × 10 6 ) is shown. It can be seen that a conductor of about 1 × 10 6 to 10 × 10 7 has little influence on the axial ratio characteristics.

図７は比較例であり、図８に示すように、無給電素子５４を設けないで、給電素子５２と地導体板６０からなる円偏波パッチアンテナ１５０の切欠量に対する周波数・軸比の関係を示している。   FIG. 7 shows a comparative example. As shown in FIG. 8, the relationship between the frequency and the axial ratio with respect to the cutout amount of the circularly polarized patch antenna 150 including the feed element 52 and the ground conductor plate 60 without providing the parasitic element 54. Is shown.

この図７から、給電素子５２のみを有する円偏波パッチアンテナ１５０の場合の軸比特性が最適となる切欠量ΔＳ／Ｓは、３．６［％］であることが分かる。   From FIG. 7, it can be seen that the cutout amount ΔS / S at which the axial ratio characteristic is optimal in the case of the circularly polarized patch antenna 150 having only the feed element 52 is 3.6 [%].

なお、円偏波パッチアンテナ５０は、２個以上並べて、例えば図９に示すように、２つの円偏波パッチアンテナ５０ａを素子アンテナとして地導体板６０上に配置した、９０゜直交配列の円偏波アレイアンテナ７０として使用することもできる。   Two or more circularly polarized patch antennas 50 are arranged side by side, for example, as shown in FIG. 9, two circularly polarized patch antennas 50a are arranged on the ground conductor plate 60 as element antennas, and are 90 ° orthogonally arranged circles. It can also be used as the polarization array antenna 70.

なお、この発明は、上述の実施形態に限らず、この明細書の記載内容に基づき、種々の構成を採り得ることはもちろんである。   Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted based on the contents described in this specification.

この発明の一実施形態の１素子アンテナからなる円偏波パッチアンテナの平面図である。It is a top view of the circularly polarized wave patch antenna which consists of 1 element antennas of one Embodiment of this invention. 図１例の円偏波パッチアンテナの斜視図である。It is a perspective view of the circularly polarized patch antenna of the example of FIG. 給電素子単体に給電した場合に形成される直線偏波の方向、及び無給電素子に給電点を形成して給電した場合に、無給電素子単体に形成される直線偏波の方向を示す説明図である。Explanatory drawing showing the direction of linearly polarized waves formed when power is fed to a single feed element and the direction of linearly polarized waves formed on a single parasitic element when a feed point is formed and fed to a parasitic element It is. 給電素子の切り落としの有無に対して軸比を比較する特性図である。It is a characteristic view which compares an axial ratio with respect to the presence or absence of cutoff of a feed element. パッチアンテナを構成する各パラメータの定義を示す説明図である。It is explanatory drawing which shows the definition of each parameter which comprises a patch antenna. 材質の違いに対する軸比特性の変化を示す特性図である。It is a characteristic view which shows the change of the axial ratio characteristic with respect to the difference in material. 給電素子の切り落とし量の変化に対する軸比特性の変化を示す特性図である。It is a characteristic view which shows the change of the axial ratio characteristic with respect to the change of the cutoff amount of a feed element. この実施形態で無給電素子を設けない場合のパッチアンテナの斜視図である。It is a perspective view of a patch antenna when a parasitic element is not provided in this embodiment. この実施形態に係る９０゜直交配列の円偏波アレイアンテナの平面図である。FIG. 3 is a plan view of a 90 ° orthogonal array circularly polarized array antenna according to this embodiment. 従来技術に係る軸比帯域の狭い円偏波アレイアンテナ（０゜並列配列円偏波アレイアンテナ）の平面図である。It is a top view of the circularly polarized array antenna (0 degree parallel arrangement | sequence circularly polarized array antenna) with a narrow axial ratio band which concerns on a prior art. 従来技術に係る軸比帯域が広い範囲に改善された円偏波アレイアンテナ（９０゜直交並列円偏波アレイアンテナ）の平面図である。It is a top view of the circularly polarized wave array antenna (90 degree orthogonal parallel circularly polarized wave array antenna) improved to the range with the axial ratio band which concerns on a prior art. 図１０、図１１例の円偏波アレイアンテナのアンテナ利得特性を比較する特性図である。FIG. 12 is a characteristic diagram for comparing antenna gain characteristics of the circularly polarized array antennas in the examples of FIGS. 10 and 11. 図１０、図１１例の円偏波アレイアンテナの軸比特性を比較する特性図である。FIG. 12 is a characteristic diagram for comparing axial ratio characteristics of the circularly polarized array antennas in the examples of FIGS. 10 and 11. 素子単体の円偏波パッチアンテナの平面図である。It is a top view of the circular polarization patch antenna of a single element. 図１４例の円偏波パッチアンテナの軸比特性図である。It is an axial ratio characteristic figure of the circularly polarized patch antenna of the example of FIG.

符号の説明Explanation of symbols

１０…円偏波アレイアンテナ ５０…円偏波パッチアンテナ
５１、５３…誘電体 ５２…給電素子
５４…無給電素子 ５６…縮退分離素子
６０…地導体板 ６２…給電点 DESCRIPTION OF SYMBOLS 10 ... Circularly polarized array antenna 50 ... Circularly polarized patch antennas 51, 53 ... Dielectric 52 ... Feeding element 54 ... Parasitic element 56 ... Degenerate separation element 60 ... Ground conductor plate 62 ... Feeding point

Claims (4)

四角形の４角中、対向する一方の２角を、１つの給電点で直線偏波となるように切り落とした六角形給電素子と、
前記六角形給電素子に対して同軸上に平行して配置した直線偏波の四角形無給電素子とを備え、
前記２角を切り落とした前記六角形給電素子と前記四角形無給電素子とで円偏波特性を得るようにした
ことを特徴とする円偏波パッチアンテナ。 A hexagonal feed element in which one of the two opposite corners of the quadrangle is cut off so as to be linearly polarized at one feed point;
A linearly polarized rectangular parasitic element arranged coaxially and parallel to the hexagonal feeding element,
A circularly polarized wave patch antenna is characterized in that a circularly polarized wave characteristic is obtained by the hexagonal feed element and the square parasitic element from which the two corners are cut off. 請求項１記載の円偏波パッチアンテナにおいて、
前記六角形給電素子の対向する他方の２角の対角線と、前記四角形無給電素子の対角線とを一致させた
ことを特徴とする円偏波パッチアンテナ。 The circularly polarized patch antenna according to claim 1,
The circularly polarized patch antenna, wherein the opposite two diagonals of the hexagonal feed element are aligned with the diagonal of the rectangular parasitic element. 請求項１又は２記載の円偏波パッチアンテナにおいて、
前記六角形給電素子を形成する前記四角形と、前記四角形無給電素子は、それぞれ正方形である
ことを特徴とする円偏波パッチアンテナ。 The circularly polarized patch antenna according to claim 1 or 2,
The circularly polarized patch antenna, wherein each of the quadrangle and the square parasitic element forming the hexagonal feed element is a square. 請求項１〜３のいずれか１項に記載の円偏波パッチアンテナを複数含む
ことを特徴とする円偏波アレイアンテナ。 A circularly polarized array antenna comprising a plurality of circularly polarized patch antennas according to any one of claims 1 to 3.
JP2005220092A 2005-07-29 2005-07-29 Circularly polarized patch antenna and circularly polarized array antenna Active JP4562611B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021064821A (en) * 2019-10-10 2021-04-22 原田工業株式会社 Patch antenna device
CN114520415A (en) * 2020-11-18 2022-05-20 稜研科技股份有限公司 Broadband linear polarization antenna structure

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JPH0482405A (en) * 1990-07-25 1992-03-16 Hitachi Chem Co Ltd Triplet plane antenna
JPH05160626A (en) * 1991-12-10 1993-06-25 Hitachi Chem Co Ltd Triplate type plane antenna with non-feed element
JPH06232627A (en) * 1992-10-02 1994-08-19 Nec Corp Microstrip antenna
JPH0758540A (en) * 1993-08-20 1995-03-03 Fujitsu General Ltd Microstrip antenna
JPH07307613A (en) * 1994-05-13 1995-11-21 Antenna Giken Kk Circular polarized wave microstrip antenna

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Publication number Priority date Publication date Assignee Title
JPH0482405A (en) * 1990-07-25 1992-03-16 Hitachi Chem Co Ltd Triplet plane antenna
JPH05160626A (en) * 1991-12-10 1993-06-25 Hitachi Chem Co Ltd Triplate type plane antenna with non-feed element
JPH06232627A (en) * 1992-10-02 1994-08-19 Nec Corp Microstrip antenna
JPH0758540A (en) * 1993-08-20 1995-03-03 Fujitsu General Ltd Microstrip antenna
JPH07307613A (en) * 1994-05-13 1995-11-21 Antenna Giken Kk Circular polarized wave microstrip antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021064821A (en) * 2019-10-10 2021-04-22 原田工業株式会社 Patch antenna device
CN114520415A (en) * 2020-11-18 2022-05-20 稜研科技股份有限公司 Broadband linear polarization antenna structure

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