JPH084205B2 - Planar antenna - Google Patents
Planar antennaInfo
- Publication number
- JPH084205B2 JPH084205B2 JP9465592A JP9465592A JPH084205B2 JP H084205 B2 JPH084205 B2 JP H084205B2 JP 9465592 A JP9465592 A JP 9465592A JP 9465592 A JP9465592 A JP 9465592A JP H084205 B2 JPH084205 B2 JP H084205B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- planar antenna
- meander
- circular polarization
- free space
- 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
- 239000010410 layer Substances 0.000 claims description 60
- 239000002356 single layer Substances 0.000 claims description 40
- 230000010287 polarization Effects 0.000 claims description 28
- 125000006850 spacer group Chemical group 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 12
- 230000005284 excitation Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、平面アンテナに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar antenna.
【０００２】[0002]
【従来の技術】従来、円偏波変換器である３層ミアンダ
ーラインにおいては、下から第１層目（又は第３層目）
のピッチｐ1 と、第２層目のピッチｐ2 との比率を０．
６７としている。また４層ミアンダーラインにおいては
第１層目（第４層目）のミアンダーラインのピッチｐ1
と、第２層目（第３層目）のミアンダーラインのピッチ
ｐ2 との比率を０．４４というように、ピッチｐ1 がピ
ッチｐ2 よりも狭いものが検討されてきた。2. Description of the Related Art Conventionally, in a three-layer meander line which is a circular polarization converter, the first layer (or the third layer) from the bottom is used.
The pitch p 1 of the second layer and the pitch p 2 of the second layer are 0.
67. In the case of a four-layer meander line, the pitch p 1 of the meander line of the first layer (fourth layer)
The pitch p 1 is narrower than the pitch p 2 such that the ratio of the second layer (third layer) to the pitch p 2 of the meander line is 0.44.
【０００３】（文献：宮原他、電子情報通信学会論文誌
（Ｂ），Ｊ７１−Ｂ，Ｎｏ１１，ｐｐ．１３５８〜１
３６４．１９８８年１１月；Ｌ．Ｙｏｕｎｇ他：ＩＥＥ
ＥＴｒａｎｓ．，ＡＰ−２１，ｐｐ３３６−３３８，Ｍ
ａｙ，１９８３；ＣＨＵＡＮＤ ＬＥＥ：ＩＥＥＥ Ｔ
ｒａｎｓ．，ＡＰ−３５，Ｎｏ．６，Ｊｕｎｅ，１９８
７ 参照）(Reference: Miyahara et al., IEICE Transactions (B), J71-B, No11, pp. 1358-1.
364. November 1988; Young et al .: IEEE
E Trans. , AP-21, pp336-338, M
ay, 1983; CHUAND LEE: IEEE T
rans. , AP-35, No. 6, June, 198
(See 7)
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、これら
のものは偏波変換器器単独のものであり、直線偏波励振
の平面アンテナ部と組み合わせた場合、広帯域に亘る軸
比の改善が困難であった。 本発明は、上述の問題点に
鑑みて為されたもので、その目的とするところは、広帯
域な軸比を有する円偏波用の平面アンテナを提供するに
ある。However, these are only polarization converters, and when combined with a plane antenna section for linear polarization excitation, it is difficult to improve the axial ratio over a wide band. It was The present invention has been made in view of the above problems, and an object of the present invention is to provide a planar antenna for circular polarization having a broadband axial ratio.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
めに、請求項１の発明は、地導体、給電回路、放射回路
が夫々別の層からなり、放射回路と給電回路とを電磁気
的に結合させる直線偏波励振の平面アンテナ部と、この
平面アンテナ部上に円偏波変換器を装荷した平面アンテ
ナにおいて、上記円偏波変換器は単層ミアンダーライン
をスペーサを介して３層重ねた構成で、下から第１層目
の単層ミアンダーラインと下から第３層目の単層ミアン
ダーラインとを同一形状とし、下から第２層目の単層ミ
アンダーラインは第１層目、第３層目の単層ミアンダー
ラインと、ピッチ、高さ、線幅、間隔の何れかが異な
り、第１層目、第３層目の単層ミアンダーラインのピッ
チと、第２層目の単層ミアンダーラインのピッチとの比
率を約０．８より大きくしたものである。In order to achieve the above-mentioned object, the invention of claim 1 is such that the ground conductor, the feeding circuit and the radiation circuit are respectively formed of different layers, and the radiation circuit and the feeding circuit are electromagnetically coupled. In a planar antenna part for linearly polarized wave excitation to be coupled to the planar antenna part and a planar antenna part in which a circular polarization converter is loaded on the planar antenna part, the circular polarization converter comprises a single layer meander line with three layers through a spacer. In the stacked structure, the first-layer single-layer meander line from the bottom and the third-layer single-layer meander line from the bottom have the same shape, and the second-layer single-layer meander line from the bottom is the same.
Underlines are single-layer meanders on the first and third layers
The line is different in pitch, height, line width, or spacing.
Ri, the first layer, the pitch of the third layer of the single layer meander lines, in which the ratio between the pitch of the second layer of single-layer meander line greater than about 0.8.
【０００６】請求項２の発明は、上記円偏波変換器を構
成する各層の単層ミアンダーラインの間隔を自由空間波
長の１／７〜１／４とし、自由空間波長の約１／１０以
下の厚さのプラスチック層で形成したレドームと上記円
偏波変換器とをスペーサを介して配置してその間隔を自
由空間波長の約１／１０とし、上記円偏波変換器と上記
平面アンテナ部とをスペーサを介して配置してその間隔
を自由空間波長の約１／１０としたものである。According to a second aspect of the present invention, the distance between the single-layer meandering lines of each layer constituting the circular polarization converter is set to 1/7 to 1/4 of the free space wavelength, and about 1/10 of the free space wavelength. A radome formed of a plastic layer having the following thickness and the circular polarization converter are arranged via a spacer and the distance therebetween is set to about 1/10 of the free space wavelength, and the circular polarization converter and the planar antenna are arranged. The parts are arranged via a spacer and the distance between them is set to about 1/10 of the free space wavelength.
【０００７】[0007]
【作用】請求項１の発明によれば、円偏波変換器は単層
ミアンダーラインをスペーサを介して３層重ねた構成
で、下から第１層目の単層ミアンダーラインと下から第
３層目の単層ミアンダーラインとを同一形状とし、下か
ら第２層目の単層ミアンダーラインは第１層目、第３層
目の単層ミアンダーラインと、ピッチ、高さ、線幅、間
隔の何れかが異なり、第１層目、第３層目の単層ミアン
ダーラインのピッチと、第２層目の単層ミアンダーライ
ンのピッチとの比率を約０．８より大きくしたので、広
帯域に亘る軸比の改善が得られ、円偏波性能に優れた平
面アンテナが実現できる。According to the first aspect of the present invention, the circular polarization converter has a structure in which single-layer meander lines are stacked in three layers with a spacer interposed therebetween. and a third layer of single-layer meander lines and the same shape, or lower
The second layer single layer meander line is the first layer and the third layer.
Single layer meander line of eye and pitch, height, line width, space
Either of the gaps is different, and the ratio of the pitch of the single-layer meander lines of the first and third layers and the pitch of the single-layer meander lines of the second layer is set to be larger than about 0.8. In addition, it is possible to improve the axial ratio over a wide band and realize a planar antenna having excellent circular polarization performance.
【０００８】請求項２記載の発明によれば、円偏波変換
器を構成する各層の単層ミアンダーラインの間隔を自由
空間波長の１／７〜１／４とし、自由空間波長の約１／
１０以下の厚さのプラスチック層で形成したレドームと
上記円偏波変換器とをスペーサを介して配置してその間
隔を自由空間波長の約１／１０とし、上記円偏波変換器
と上記平面アンテナ部とをスペーサを介して配置してそ
の間隔を自由空間波長の約１／１０としたので、レドー
ムが設けられる場合においても軸比が改善され、軸比１
ｄＢ以下の優れた円偏波用の平面アンテナが実現でき
る。According to the second aspect of the present invention, the spacing of the single-layer meander lines of each layer constituting the circular polarization converter is set to 1/7 to 1/4 of the free space wavelength, and about 1 of the free space wavelength. /
A radome formed of a plastic layer having a thickness of 10 or less and the circular polarization converter are arranged via a spacer and the distance therebetween is set to about 1/10 of the free space wavelength, and the circular polarization converter and the plane are arranged. Since the antenna part is arranged via the spacer and the interval is set to about 1/10 of the free space wavelength, the axial ratio is improved even when the radome is provided, and the axial ratio is 1
An excellent plane antenna for circular polarization of dB or less can be realized.
【０００９】[0009]
【実施例】以下本発明を実施例により説明する。図１は
直線偏波励振の平面アンテナ部１と、円偏波変換器２
と、レドーム３とを含めた円偏波用の平面アンテナから
なる実施例の分解斜視図を示し、図２はその断面図を示
している。本実施例の直線偏波励振の平面アンテナ部１
は、下から地導体１０、給電回路板１１、放射回路板１
２をスペーサ４1 、４2 を介して積層して構成される。
給電回路板１１はフイルム状等の基板上に銅箔を積層し
たものからなり、エッチングにより給電回路１３を形成
している。また放射回路板４は図３に示すように給電回
路１３の給電プローブ１３ａと電磁気的に結合が可能な
一対のスロット１４，１４（一つのスロットの大城は４
ｍｍ×１５ｍｍ）を等間隔に打ち抜いて放射回路を形成
した、例えば０．５ｍｍのアルミニュウム板のような金
属板からなる。EXAMPLES The present invention will be described below with reference to examples. FIG. 1 shows a plane antenna section 1 for linearly polarized wave excitation and a circular polarization converter 2.
2 is an exploded perspective view of an embodiment of the present invention including a circularly polarized plane antenna including the and the radome 3, and FIG. 2 is a sectional view thereof. The plane antenna section 1 for linearly polarized wave excitation of the present embodiment
Is a ground conductor 10, a feeding circuit board 11, and a radiation circuit board 1 from the bottom.
2 is laminated via spacers 4 1 and 4 2 .
The power supply circuit board 11 is formed by laminating copper foil on a film-shaped substrate or the like, and the power supply circuit 13 is formed by etching. As shown in FIG. 3, the radiating circuit board 4 has a pair of slots 14 and 14 capable of electromagnetically coupling with the power feeding probe 13a of the power feeding circuit 13 (one slot is 4
(mm × 15 mm) is punched at equal intervals to form a radiation circuit, and is made of a metal plate such as a 0.5 mm aluminum plate.
【００１０】円偏波変換器２は、単層ミアンダーライン
を３層重ねて構成されたもので、平面アンテナ部１の上
方に自由空間波長（以下λ0 と略す）の約１／１０の厚
さのスペーサ４3 を介して装荷されている。ここで下か
ら第１層目の単層ミアンダーライン２０と、下から第３
層目の単層ミアンダーライン２２とが同じ形状で、第２
層目の単層ミアンダーライン２１が別形状となってお
り、各単層ミアンダーライン２０〜２２は間隔がλ0 ／
７〜λ0 ／４程度となるように夫々スペーサ４4、４5
を介して積層されている。The circular polarization converter 2 is formed by stacking three single-layer meander lines, and is above the planar antenna section 1 at about 1/10 of the free space wavelength (hereinafter abbreviated as λ 0 ). are loaded through the spacers 4 3 thickness. Here, from the bottom to the first-layer single-layer meander line 20, and from the bottom to the third
The same shape as the single-layer meander line 22 of the second layer,
The single-layer meander line 21 of the second layer has a different shape, and the intervals between the single-layer meander lines 20 to 22 are λ 0 /
7~λ 0/4 about to become as each spacer 4 4, 4 5
Are stacked through.
【００１１】そして第３層目の単層ミアンダーライン２
２の上方には厚さ約λ0 ／１０のスペーサ４6 を介して
厚さ約λ0 ／１０以下のプラスチック層からなるレドー
ム３を配置している。ここで単層ミアンダーラインの設
計パラメータは図４に示すようにピッチｐ、高さｂ、周
期ｈ、幅ｗ1 、ｗ2 からなるが、本実施例ではこの設計
パラメータの内ピッチｐを次のように設定した。The single-layer meander line 2 of the third layer
The second upward are disposed radome 3 having a thickness of about lambda 0/10 or less of the plastic layer through the spacer 4 6 with a thickness of about λ 0/10. Here, the design parameters of the single-layer meander line are composed of the pitch p, the height b, the period h, and the widths w 1 and w 2 as shown in FIG. 4. In this embodiment, the inner pitch p of the design parameters is It was set like.
【００１２】つまり第１層目（第３層目）の単層ミアン
ダーライン２０（２２）のピッチｐ 1 と、第２層目の単
層ミアンダーライン２１のピッチｐ2 との比率ｐ1 ／ｐ
2 を種々に変化させた場合における軸比を測定してみた
ところ、図５に示すような結果が得られ、この結果から
比率ｐ1 ／ｐ2 が０．８以上あれば軸比が１ｄＢ以下と
なって軸比が改善されることが分かる。That is, the first layer (third layer) single layer mean
Pitch p of the Darline 20 (22) 1And the second layer
Pitch p of layer meander line 212Ratio p with1/ P
2I measured the axial ratio in the case of various changes
However, the results shown in Fig. 5 were obtained, and from these results
Ratio p1/ P2Is 0.8 or more, the axial ratio is 1 dB or less
It can be seen that the axial ratio is improved.
【００１３】そこで本実施例では比率ｐ1 ／ｐ2 を１．
２５に設定した。図６は比率ｐ1 ／ｐ2 を１．２５に設
定した本実施例の軸比の周波数特性を示している。尚上
記実施例では比率ｐ1 ／ｐ2 を１．２５に設定したが、
０．８以上あれば軸比が改善されるため、上記実施例の
比率に特に限定されるものでない。また放射回路板１２
の放射回路として上記のように一対のスロット１４，１
４の代わりに図７に示すように正方形のアパーチャ１５
を用いても良い。Therefore, in this embodiment, the ratio p 1 / p 2 is 1.
It was set to 25. FIG. 6 shows the frequency characteristic of the axial ratio of this embodiment in which the ratio p 1 / p 2 is set to 1.25. Although the ratio p 1 / p 2 is set to 1.25 in the above embodiment,
If the ratio is 0.8 or more, the axial ratio is improved, so the ratio is not particularly limited to the ratio in the above embodiment. In addition, the radiation circuit board 12
As a radiation circuit of the pair of slots 14, 1 as described above
Instead of 4, a square aperture 15 as shown in FIG.
May be used.
【００１４】[0014]
【発明の効果】請求項１の発明は、円偏波変換器は単層
ミアンダーラインをスペーサを介して３層重ねた構成
で、下から第１層目の単層ミアンダーラインと下から第
３層目の単層ミアンダーラインとを同一形状とし、下か
ら第２層目の単層ミアンダーラインは第１層目、第３層
目の単層ミアンダーラインと、ピッチ、高さ、線幅、間
隔の何れかが異なり、第１層目、第３層目の単層ミアン
ダーラインのピッチと、第２層目の単層ミアンダーライ
ンのピッチとの比率を約０．８より大きくしたので、広
帯域に亘る軸比の改善が得られ、円偏波性能に優れた平
面アンテナが実現できるという効果がある。According to the invention of claim 1, the circular polarization converter has a structure in which three layers of single-layer meander lines are stacked with a spacer interposed therebetween. and a third layer of single-layer meander lines and the same shape, or lower
The second layer single layer meander line is the first layer and the third layer.
Single layer meander line of eye and pitch, height, line width, space
Either of the gaps is different, and the ratio of the pitch of the single-layer meander lines of the first and third layers and the pitch of the single-layer meander lines of the second layer is set to be larger than about 0.8. There is an effect that the axial ratio can be improved over a wide band and a plane antenna having excellent circular polarization performance can be realized.
【００１５】特に請求項２記載の発明は、円偏波変換器
を構成する各層の単層ミアンダーラインの間隔を自由空
間波長の１／７〜１／４とし、自由空間波長の約１／１
０以下の厚さのプラスチック層で形成したレドームと上
記円偏波変換器とをスペーサを介して配置してその間隔
を自由空間波長の約１／１０とし、上記円偏波変換器と
上記平面アンテナ部とをスペーサを介して配置してその
間隔を自由空間波長の約１／１０としたので、レドーム
が設けられる場合においても軸比が改善され、軸比１ｄ
Ｂ以下の優れた円偏波用の平面アンテナが実現できると
いう効果がある。In particular, the invention of claim 2 sets the interval of the single-layer meander lines of each layer constituting the circular polarization converter to 1/7 to 1/4 of the free space wavelength, and about 1/1 of the free space wavelength. 1
A radome formed of a plastic layer having a thickness of 0 or less and the circular polarization converter are arranged via a spacer and the distance therebetween is set to about 1/10 of the free space wavelength, and the circular polarization converter and the plane are arranged. Since the antenna part is arranged via the spacer and the interval is set to about 1/10 of the free space wavelength, the axial ratio is improved even when the radome is provided, and the axial ratio is 1d.
There is an effect that an excellent planar antenna for circular polarization of B or less can be realized.
【図１】本発明の一実施例の一部破断省略した分解斜視
図である。FIG. 1 is an exploded perspective view of an embodiment of the present invention with a part thereof omitted.
【図２】同上の断面図である。FIG. 2 is a sectional view of the same.
【図３】放射回路板の放射回路の他の例の一部省略した
上面図である。FIG. 3 is a partially omitted top view of another example of the radiation circuit of the radiation circuit board.
【図４】単層ミアンダーラインの設計パラメータの説明
図である。FIG. 4 is an explanatory diagram of design parameters of a single layer meander line.
【図５】ピッチの比率ｐ1 ／ｐ2 と軸比との関係特性図
である。FIG. 5 is a relationship characteristic diagram between a pitch ratio p 1 / p 2 and an axial ratio.
【図６】本発明の一実施例の周波数特性図である。FIG. 6 is a frequency characteristic diagram of an example of the present invention.
【図７】放射回路板の放射回路の他の例の一部省略した
上面図である。FIG. 7 is a partially omitted top view of another example of the radiation circuit of the radiation circuit board.
１ 平面アンテナ部 ２ 円偏波変換器 ３ レドーム １０ 地導体 １１ 給電回路板 １２ 放射回路板 ２０〜２２ 単層ミアンダーライン DESCRIPTION OF SYMBOLS 1 Planar antenna part 2 Circular polarization converter 3 Radome 10 Ground conductor 11 Feeding circuit board 12 Radiating circuit board 20-22 Single layer meander line
Claims (2)
からなり、放射回路と給電回路とを電磁気的に結合させ
る直線偏波励振の平面アンテナ部と、この平面アンテナ
部上に円偏波変換器を装荷した平面アンテナにおいて、
上記円偏波変換器は単層ミアンダーラインをスペーサを
介して３層重ねた構成で、下から第１層目の単層ミアン
ダーラインと下から第３層目の単層ミアンダーラインと
を同一形状とし、下から第２層目の単層ミアンダーライ
ンは第１層目、第３層目の単層ミアンダーラインと、ピ
ッチ、高さ、線幅、間隔の何れかが異なり、第１層目、
第３層目の単層ミアンダーラインのピッチと、第２層目
の単層ミアンダーラインのピッチとの比率を約０．８よ
り大きくしたことを特徴とする平面アンテナ。1. A ground plane conductor, a feeding circuit, and a radiation circuit are each formed of different layers, and a linearly polarized wave excitation planar antenna section for electromagnetically coupling the radiation circuit and the feeding circuit, and a circle on the planar antenna section. In a plane antenna loaded with a polarization converter,
The circular polarization converter has a structure in which single-layer meander lines are stacked in three layers via a spacer, and a single-layer meander line of the first layer from the bottom and a single-layer meander line of the third layer from the bottom are provided. The same shape, and the second single layer meander layer from the bottom
Is the first layer and the third layer single layer meander line,
Switch, height, line width, or spacing is different, the first layer,
A planar antenna characterized in that the ratio of the pitch of the single-layer meander lines of the third layer and the pitch of the single-layer meander lines of the second layer is made larger than about 0.8.
アンダーラインの間隔を自由空間波長の１／７〜１／４
とし、自由空間波長の約１／１０以下の厚さのプラスチ
ック層で形成したレドームと上記円偏波変換器とをスペ
ーサを介して配置してその間隔を自由空間波長の約１／
１０とし、上記円偏波変換器と上記平面アンテナ部とを
スペーサを介して配置してその間隔を自由空間波長の約
１／１０としたことを特徴とする請求項１記載の平面ア
ンテナ。2. An interval between single-layer meander lines of each layer constituting the circular polarization converter is set to 1/7 to 1/4 of a free space wavelength.
And the radome formed of a plastic layer having a thickness of about 1/10 or less of the free space wavelength and the circular polarization converter are arranged via a spacer, and the distance therebetween is about 1 / the free space wavelength.
10. The planar antenna according to claim 1, wherein the circularly polarized wave converter and the planar antenna section are arranged with a spacer therebetween and the distance therebetween is about 1/10 of the free space wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9465592A JPH084205B2 (en) | 1992-04-15 | 1992-04-15 | Planar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9465592A JPH084205B2 (en) | 1992-04-15 | 1992-04-15 | Planar antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05291825A JPH05291825A (en) | 1993-11-05 |
| JPH084205B2 true JPH084205B2 (en) | 1996-01-17 |
Family
ID=14116273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9465592A Expired - Fee Related JPH084205B2 (en) | 1992-04-15 | 1992-04-15 | Planar antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084205B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000022431A (en) * | 1998-07-01 | 2000-01-21 | Matsushita Electric Ind Co Ltd | Antenna device |
| TWI738343B (en) * | 2020-05-18 | 2021-09-01 | 為昇科科技股份有限公司 | Meander antenna structure |
-
1992
- 1992-04-15 JP JP9465592A patent/JPH084205B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05291825A (en) | 1993-11-05 |
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