JPH07307612A - Plane antenna - Google Patents
Plane antennaInfo
- Publication number
- JPH07307612A JPH07307612A JP9769094A JP9769094A JPH07307612A JP H07307612 A JPH07307612 A JP H07307612A JP 9769094 A JP9769094 A JP 9769094A JP 9769094 A JP9769094 A JP 9769094A JP H07307612 A JPH07307612 A JP H07307612A
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- JP
- Japan
- Prior art keywords
- dielectric layer
- antenna
- layer
- line
- conductor
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種無線装置に適用し
て好適な平面アンテナに関し、特にマイクロストリップ
アンテナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar antenna suitable for application to various wireless devices, and more particularly to a microstrip antenna.
【０００２】[0002]
【従来の技術】マイクロストリップアンテナは薄形、軽
量な平面アンテナであると共に、エッチング技術で容易
に製作できるため、多くの分野で応用されている。特
に、電磁結合型マイクロストリップアンテナは、給電の
際に給電ピン等を用いない非接触型の平面アンテナであ
るために、アレー化に適した構造を有する。2. Description of the Related Art Microstrip antennas are thin and lightweight planar antennas, and can be easily manufactured by etching techniques, so that they are applied in many fields. In particular, the electromagnetically coupled microstrip antenna is a non-contact type planar antenna that does not use feeding pins or the like when feeding power, and thus has a structure suitable for arraying.
【０００３】電磁結合型の平面アンテナの一構成例とし
て、トリプレート線路給電マイクロストリップアンテナ
の構成を図４に示す。トリプレート線路給電マイクロス
トリップアンテナは、放射導体３１がギャップ３２を介
して地導体３３の中心に配置してある。この場合、ギャ
ップ３２の幅ｇは、放射導体３１の縁端効果（電磁界の
漏れにより実際の放射体の寸法が大きくなる効果）に影
響を与えない幅としてある。この放射導体３１，地導体
３３の下に誘電体層３４及び３５が配され、両誘電体層
３４，３５の間に給電線路３７が配される。そして、誘
電体層３５の下に地導体３６が配される。FIG. 4 shows the structure of a triplate line-fed microstrip antenna as an example of the structure of an electromagnetically coupled planar antenna. In the triplate line-fed microstrip antenna, the radiation conductor 31 is arranged at the center of the ground conductor 33 with a gap 32 interposed therebetween. In this case, the width g of the gap 32 is a width that does not affect the edge effect of the radiating conductor 31 (the effect of increasing the actual size of the radiator due to leakage of the electromagnetic field). Dielectric layers 34 and 35 are arranged under the radiation conductor 31 and the ground conductor 33, and a feeding line 37 is arranged between the dielectric layers 34 and 35. Then, the ground conductor 36 is arranged below the dielectric layer 35.
【０００４】この図４に示すアンテナは、放射系は地導
体３６上に誘電体層３４及び３５を介して放射導体３１
を配置したマイクロストリップアンテナ構造として構成
され、給電系は給電線路３７からの不要放射を抑制する
ために、給電線路３７をそれぞれ誘電体層３４，３５を
介して地導体３３，３６で遮蔽したトリプレート線路構
造として構成される。なお、説明の便宜上、図面中では
各層を分割して明記しているが、実際は各層を密着させ
て構成される（本明細書で以下に説明するアンテナの場
合も同じ）。In the antenna shown in FIG. 4, the radiation system has a radiation conductor 31 on a ground conductor 36 via dielectric layers 34 and 35.
The power feeding system is configured as a microstrip antenna structure in which the power feeding line 37 is shielded by ground conductors 33 and 36 via dielectric layers 34 and 35, respectively, in order to suppress unnecessary radiation from the power feeding line 37. It is constructed as a plate line structure. Note that, for convenience of description, although the layers are shown separately in the drawings, the layers are actually in close contact with each other (the same applies to an antenna described below in this specification).
【０００５】このアンテナは、放射導体３１への給電
は、給電線路３７より電磁結合にて行ない、放射系と給
電系の整合は、給電線路３７の幅およびそのスタブ長ｌ
ｓ3 を調整して実現される。なお、その放射特性は、放
射導体３１の寸法ａ31，ｂ31、誘電体層３４及び３５の
比誘電率、誘電体層３４及び３５の厚さｈ31及びｈ32が
主なパラメータとして決定される。In this antenna, the radiation conductor 31 is fed by electromagnetic coupling from the feeding line 37, and the matching between the radiation system and the feeding system is performed by the width of the feeding line 37 and its stub length l.
It is realized by adjusting s 3 . The radiation characteristics thereof are determined mainly by the dimensions a 31 , b 31 of the radiation conductor 31, the relative permittivities of the dielectric layers 34 and 35, and the thicknesses h 31 and h 32 of the dielectric layers 34 and 35. It
【０００６】次に、同様な電磁結合型の平面アンテナの
一構成例として、スロット結合マイクロストリップアン
テナの構成を図５に示す。このアンテナは、放射導体４
１が誘電体層４２の中心に配置してあると共に、誘電体
層４２の下層に地導体４３を介して誘電体層４５が配さ
れる。この場合、地導体４３の中心に励振用スロット４
４が設けてある。さらに、誘電体層４５の下層に給電線
路４６，誘電体層４７，地導体４８が配置されて構成さ
れる。この場合、励振用スロット４４の幅ｗａは放射導
体４１の１辺の長さａ41に比べ十分小さくしてある。Next, FIG. 5 shows a configuration of a slot-coupled microstrip antenna as an example of a configuration of a similar electromagnetic coupling type planar antenna. This antenna has a radiating conductor 4
1 is arranged at the center of the dielectric layer 42, and the dielectric layer 45 is arranged below the dielectric layer 42 with the ground conductor 43 interposed therebetween. In this case, the excitation slot 4 is placed at the center of the ground conductor 43.
4 is provided. Further, a feed line 46, a dielectric layer 47, and a ground conductor 48 are arranged below the dielectric layer 45. In this case, the width wa of the excitation slot 44 is sufficiently smaller than the length a 41 of one side of the radiation conductor 41.
【０００７】このスロット結合マイクロストリップアン
テナは、励振用スロット４４の幅ｗａが放射導体４１の
長さａ41に比べ十分小さいため、放射系は地導体４３上
に誘電体層４２を介して放射導体４１を配置したマイク
ロストリップアンテナ構造となり、給電系は給電線路４
６をそれぞれ誘電体層４５，４７を介して地導体４３，
４８で遮蔽したトリプレート線路構造となる。放射導体
４１への給電は、給電線路４６より励振用スロット４４
を介して電磁結合にて行ない、整合は、励振用スロット
４４の長さｌａ及び幅ｗａ、給電線路４６の幅及びその
スタブ長ｌｓ4を調整して実現される。なお、その放射
特性は、放射導体４１の寸法ａ41，ｂ41、誘電体層４２
の比誘電率、誘電体層４２の厚さｈ41が主なパラメータ
として決定される。In this slot-coupled microstrip antenna, since the width wa of the excitation slot 44 is sufficiently smaller than the length a 41 of the radiating conductor 41, the radiating system is arranged on the ground conductor 43 via the dielectric layer 42. 41 has a microstrip antenna structure, and the feeding system is the feeding line 4
6 through the dielectric layers 45 and 47, respectively, to the ground conductor 43,
The triplate line structure is shielded by 48. Power is fed to the radiation conductor 41 from the feed line 46 through the excitation slot 44.
Matching is performed by electromagnetically coupling through, by adjusting the length la and width wa of the excitation slot 44, the width of the feed line 46 and its stub length Is 4 . The radiation characteristics are as follows: the dimensions a 41 , b 41 of the radiation conductor 41 and the dielectric layer 42.
And the thickness h 41 of the dielectric layer 42 are determined as main parameters.
【０００８】[0008]
【発明が解決しようとする課題】ところで、マイクロス
トリップアンテナは、誘電体層が厚くなるにつれ、広帯
域特性を示すことが広く知られている。そこで、上述し
た図４に示すトリプレート線路給電マイクロストリップ
アンテナにおいて、広帯域化を図るために誘電体層の厚
み（ｈ31＋ｈ32）を厚くすることが考えられるが、この
ように厚くすると、不可避的にトリプレート線路の厚さ
を厚くすることにつながり、その結果、トリプレート線
路内に高次モードを発生させ、伝送損失の増加の原因と
なる。さらに、トリプレート線路の構成には極めて低損
失な比誘電率が１に近い材料が望ましいために、放射導
体の小形化が困難である。また、スロット結合マイクロ
ストリップアンテナでは、トリプレート線路の上部地導
体がマイクロストリップアンテナの地導体となるため、
その帯域は誘電体層厚ｈ41により決定され、同じ厚さの
誘電体基板で構成した従来のトリプレート給電マイクロ
ストリップアンテナより狭帯域となる。By the way, it is widely known that the microstrip antenna exhibits wide band characteristics as the dielectric layer becomes thicker. Therefore, in the above described triplate line-fed microstrip antenna shown in FIG. 4, it is conceivable to increase the thickness (h 31 + h 32 ) of the dielectric layer in order to widen the band, but if it is increased in this way, it is unavoidable. This leads to an increase in the thickness of the triplate line, and as a result, a higher-order mode is generated in the triplate line, which causes an increase in transmission loss. Furthermore, it is difficult to reduce the size of the radiation conductor because a material having an extremely low loss and a relative dielectric constant close to 1 is desirable for the configuration of the triplate line. Also, in the slot-coupled microstrip antenna, the upper ground conductor of the triplate line becomes the ground conductor of the microstrip antenna.
The band is determined by the dielectric layer thickness h 41 , which is a narrower band than that of the conventional triplate-fed microstrip antenna composed of dielectric substrates having the same thickness.
【０００９】本発明の目的は、良好に広帯域化を図るこ
とができる平面アンテナを提供することにある。An object of the present invention is to provide a planar antenna that can achieve a wide band satisfactorily.
【００１０】[0010]
【課題を解決するための手段】本発明は、例えば図１に
示すように、給電線路１６の上下を誘電体層１５，１７
を介して地導体１３，１８で遮蔽したトリプレート線路
を給電に用いると共に、このトリプレート線路の上部地
導体１３に開口部１４を設け、開口部１４の上層に誘電
体層１２を介して放射導体１１を配置し、開口部１４を
放射導体１１よりも大きくしたものである。In the present invention, for example, as shown in FIG. 1, dielectric layers 15 and 17 are formed above and below a feed line 16.
The triplate line shielded by the ground conductors 13 and 18 via the power supply is used for power supply, the upper ground conductor 13 of the triplate line is provided with an opening 14, and the upper layer of the opening 14 is radiated via the dielectric layer 12. The conductor 11 is arranged and the opening 14 is made larger than the radiation conductor 11.
【００１１】また、この場合に開口部１４の上層の誘電
体層１２として、給電線路層１５，１７と異なる誘電率
を有する誘電体層を用いたものである。Further, in this case, as the dielectric layer 12 above the opening 14, a dielectric layer having a dielectric constant different from that of the feed line layers 15 and 17 is used.
【００１２】さらに、それぞれの場合に開口部１４の上
層の誘電体層１２の厚さを、給電線路層１５，１７と異
なる厚さの誘電体層としたものである。Further, in each case, the thickness of the dielectric layer 12 above the opening 14 is different from that of the feed line layers 15 and 17.
【００１３】[0013]
【作用】本発明によると、給電線路であるトリプレート
線路の厚みを変えることなくアンテナ部の基板厚のみを
厚くすることができるため、従来のトリプレート線路給
電マイクロストリップアンテナ及びスロット結合マイク
ロストリップアンテナに比べ、アンテナの広帯域化が可
能である。According to the present invention, only the substrate thickness of the antenna portion can be increased without changing the thickness of the triplate line which is the feed line. Therefore, the conventional triplate line feed microstrip antenna and slot-coupled microstrip antenna are used. Broadening of the antenna is possible compared to.
【００１４】また、この場合に開口部の上層の誘電体層
として、給電線路層と異なる誘電率を有する誘電体層を
用いることで、より効果的に広帯域化を図ることができ
ると共に、高効率化が可能である。Further, in this case, by using a dielectric layer having a dielectric constant different from that of the feed line layer as the dielectric layer above the opening, it is possible to more effectively widen the band and to increase the efficiency. Is possible.
【００１５】さらに、それぞれの場合に開口部の上層の
誘電体層の厚さを、給電線路層と異なる厚さの誘電体層
とすることで、より効果的に広帯域化，高効率化を図る
ことができると共に、トリプレート線路内での高次モー
ドの発生を抑制でき、給電線路での損失の低減が可能で
ある。Further, in each case, the thickness of the dielectric layer above the opening is made different from the thickness of the feed line layer, so that a wider band and higher efficiency can be achieved more effectively. In addition, it is possible to suppress the generation of higher-order modes in the triplate line and reduce the loss in the power feed line.
【００１６】[0016]
【実施例】以下、本発明の一実施例を図１及び図２を参
照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１７】図１は本例のアンテナを示す図で、放射導
体１１が誘電体層１２の上に配された第１層と、誘電体
層１５の上に地導体１３が配された第２層と、給電線路
１６が上面に設けられた誘電体層１７とその下面の地導
体１８で構成される第３層の計３層で構成される。この
場合、誘電体層１５の上の地導体１３には、四角形の開
口部１４が形成させてある。なお、説明の便宜上、図中
では各層を分割して明記しているが、実際は各層を密着
させて構成される。FIG. 1 is a diagram showing an antenna of this example, in which a radiation conductor 11 is disposed on a dielectric layer 12 as a first layer and a dielectric layer 15 is disposed on a ground conductor 13 as a second layer. The third layer is composed of a layer, a dielectric layer 17 provided with the feed line 16 on the upper surface, and a ground conductor 18 on the lower surface, a total of three layers. In this case, a rectangular opening 14 is formed in the ground conductor 13 on the dielectric layer 15. Note that, for convenience of explanation, although each layer is shown in a divided manner in the drawing, in practice, each layer is configured to be in close contact.
【００１８】ここで、放射導体１１及び開口部１４の形
状は、図１に示した四角形のみならず各種形状において
構成可能であるが、開口部１４の大きさは、放射導体１
１の縁端効果に影響を与えない適切な大きさにする（少
なくとも放射導体１１よりも大きくする）必要がある。
例えば図１に示した四角形の開口部１４の場合には、開
口部１４の寸法ａ12，ｂ12には、放射導体１１の縁端効
果に影響を与えない次式〔数１〕式，〔数２〕式より求
まる適切な寸法を用いる必要がある。Here, the shape of the radiation conductor 11 and the opening 14 can be configured in various shapes other than the quadrangle shown in FIG. 1, but the size of the opening 14 is different.
It is necessary to have an appropriate size (at least larger than the radiation conductor 11) so as not to affect the edge effect of 1.
For example, in the case of the quadrangular opening 14 shown in FIG. 1, the dimensions a 12 and b 12 of the opening 14 have the following equations [Equation 1], [Equation 1] that do not affect the edge effect of the radiation conductor 11. It is necessary to use an appropriate size obtained from the formula 2].
【００１９】[0019]
【数１】ａ12≧ａ11＋４ｈ・ln２ ／ π[Formula 1] a 12 ≧ a 11 + 4h · ln2 / π
【００２０】[0020]
【数２】ｂ12≧ b11＋４ｈ・ln 2 ／ π ただし、ｈはマイクロストリップアンテナの基板厚であ
り、図１の構成では３枚の誘電体層１２，１５，１７の
厚さ（即ちｈ＝ｈ11＋ｈ12＋ｈ13）となる。また、
ａ11， b11は、四角形の放射導体１１の２辺の長さであ
る（図１参照）。B 12 ≧ b 11 + 4h · ln 2 / π where h is the substrate thickness of the microstrip antenna, and in the configuration of FIG. 1, the thickness of the three dielectric layers 12, 15, 17 (that is, h = H 11 + h 12 + h 13 ). Also,
a 11 and b 11 are the lengths of two sides of the rectangular radiation conductor 11 (see FIG. 1).
【００２１】このように構成される本例のアンテナは、
放射系は地導体１８上に誘電体層１２，１５及び１７を
介して放射導体１１を配置したマイクロストリップアン
テナ構造となり、給電系は給電線路１６をそれぞれ誘電
体層１５，１７を介して地導体１３，１８で遮蔽したト
リプレート線路構造となる。なお、給電線路１６に示す
ｌｓ1 は、給電線路１６のスタブ長である。The antenna of this example configured as described above is
The radiating system has a microstrip antenna structure in which the radiating conductor 11 is arranged on the ground conductor 18 via the dielectric layers 12, 15 and 17, and the feeding system connects the feeding line 16 to the ground conductor via the dielectric layers 15 and 17, respectively. It becomes a triplate line structure shielded by 13 and 18. In addition, ls 1 shown in the power supply line 16 is a stub length of the power supply line 16.
【００２２】このように構成されるトリプレート線路給
電平面アンテナの反射損の周波数特性を、図２に示す。
図２において、実線で示す特性が本例のアンテナの特性
で、破線で示す特性が従来例のアンテナ（図４に示すア
ンテナ）の特性である。同図より、VSWRが2.0 以下の帯
域は、従来例が2.3 ％であるのに対し、本例では3.4％
となり、広帯域化が図られていることが確認できる。な
お、従来例では放射導体３１の２辺の大きさａ31＝ｂ31
＝ 23.0mm,ギャップ３２の幅ｇ = 1.5 mm,各誘電体層の
厚みｈ31＝ｈ32＝0.8mm とした場合の特性値であり、本
例のアンテナでは放射導体１１の２辺の長さａ11＝ｂ11
＝ 23.0mm , 開口部１４の２辺の長さａ 12＝ｂ12＝27.0
mm，誘電体層１２，１５，１７の厚さｈ11＝ｈ12＝ｈ12
＝0.8mmである。A triplate line feeder configured as described above
The frequency characteristic of the reflection loss of the electric plane antenna is shown in FIG.
In FIG. 2, the characteristic indicated by the solid line is the characteristic of the antenna of this example.
The characteristic indicated by the broken line is the antenna of the conventional example (the antenna shown in FIG.
Antenna) characteristics. From the figure, it can be seen that VSWR is 2.0 or less.
The area is 3.4% in this example, compared with 2.3% in the conventional example.
Therefore, it can be confirmed that the band is widened. Na
In the conventional example, the size a of the two sides of the radiation conductor 31 is a.31= B31
= 23.0 mm, width of gap 32 g = 1.5 mm, for each dielectric layer
Thickness h31= H32= 0.8mm is the characteristic value when
In the example antenna, the length a of two sides of the radiation conductor 11 is11= B11
= 23.0 mm, the length a of the two sides of the opening 14 12= B12= 27.0
mm, thickness h of the dielectric layers 12, 15, 1711= H12= H12
= 0.8 mm.
【００２３】なお、本例のアンテナの場合には、上層の
誘電体層１２として、トリプレート線路を構成する誘電
体層１５，１７と異なる誘電率の誘電体層を使用するこ
とで、より特性の改善を行うことができる。例えば、上
層の誘電体層１２として、誘電体層１５，１７よりも低
誘電率な材料を用いた場合、より広帯域かつ高効率な特
性が得られる。また、上層の誘電体層１２として、誘電
体層１５，１７よりも高誘電率な材料を用いた場合、放
射導体１１の小形化が実現される。In the case of the antenna of this example, by using as the upper dielectric layer 12 a dielectric layer having a dielectric constant different from that of the dielectric layers 15 and 17 forming the triplate line, it is possible to further improve the characteristics. Can be improved. For example, when a material having a lower dielectric constant than the dielectric layers 15 and 17 is used as the upper dielectric layer 12, a wider band and higher efficiency characteristics can be obtained. Further, when a material having a higher dielectric constant than the dielectric layers 15 and 17 is used as the upper dielectric layer 12, the radiation conductor 11 can be downsized.
【００２４】次に、本発明の平面アンテナの他の実施例
を、図３を参照して説明する。本例の場合には、その基
本的構成は図１の例と同様であり、放射導体２１が誘電
体層２２の上に配された第１層と、誘電体層２５の上に
地導体２３が配された第２層と、給電線路２６が上面に
設けられた誘電体層２７とその下面の地導体２８で構成
される第３層の計３層で構成される。この場合、誘電体
層２５の上の地導体２３には、四角形の開口部２４が形
成させてある。Next, another embodiment of the planar antenna of the present invention will be described with reference to FIG. In the case of this example, the basic configuration is the same as that of the example of FIG. 1, and the radiation conductor 21 is arranged on the first layer on the dielectric layer 22, and the ground conductor 23 on the dielectric layer 25. Is arranged, and the feed line 26 is composed of a dielectric layer 27 provided on the upper surface and a third layer composed of a ground conductor 28 on the lower surface, a total of three layers. In this case, a square opening 24 is formed in the ground conductor 23 on the dielectric layer 25.
【００２５】そして本例においては、上層の誘電体層２
２の厚さｈ21を、トリプレート線路の誘電体層２５，２
７の厚さｈ22，ｈ23と異なる厚さの誘電体層とする。ま
た、スタブ長ｌｓ2 の給電線路２６に、その幅を細くし
たλg ／４整合回路２９を挿入する。これにより、給電
系と放射系の結合が弱くなる際の整合を可能にしてい
る。この構造において、トリプレート線路の誘電体層２
５，２７の厚さを最適に設計することにより、給電線路
での損失を抑制することができ、アレー化に適した構造
であると共に、広帯域な特性を得ることができる。In this example, the upper dielectric layer 2
2 has a thickness h 21 of the dielectric layers 25, 2 of the triplate line.
7. The dielectric layer has a thickness different from the thicknesses h 22 and h 23 of FIG. Further, a λg / 4 matching circuit 29 having a narrow width is inserted in the feed line 26 having the stub length ls 2 . This enables matching when the coupling between the feeding system and the radiation system becomes weak. In this structure, the dielectric layer 2 of the triplate line is used.
By optimally designing the thicknesses of 5, 27, it is possible to suppress the loss in the feed line, and it is possible to obtain a wide band characteristic while having a structure suitable for forming an array.
【００２６】なお、この図３に示すように上層の誘電体
層の厚さを、トリプレート線路の誘電体層の厚さと変え
る場合においても、上述したように誘電率を変えるよう
にしても良いことは勿論である。Even when the thickness of the upper dielectric layer is changed from the thickness of the dielectric layer of the triplate line as shown in FIG. 3, the dielectric constant may be changed as described above. Of course.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば以
下の効果が得られる。 ・ 放射系、給電系を独立して設計できるため、大幅に
設計性が改善される。 ・ 給電線路であるトリプレート線路の基板厚に関係な
く、アンテナ部の基板厚を厚くすることができるため、
アンテナの広帯域化が実現できる。As described above, according to the present invention, the following effects can be obtained.・ Because the radiation system and the power feeding system can be designed independently, the designability is greatly improved.・ Because the substrate thickness of the antenna part can be made large regardless of the substrate thickness of the triplate line that is the feed line,
Wide band of the antenna can be realized.
【００２８】また、開口部の上層の誘電体層として、給
電線路層と異なる誘電率を有する誘電体層を用いること
で、以下の効果が得られる。 ・ 従来と比較して、上層の誘電体層に低誘電率な材料
を用いた場合、アンテナの広帯域化、高効率化が実現さ
れる。 ・ 従来と比較して、上層の誘電体層に高誘電率な材料
を用いた場合、放射導体の小形化が実現される。By using a dielectric layer having a dielectric constant different from that of the feed line layer as the dielectric layer above the opening, the following effects can be obtained. -Compared with the conventional method, when a material having a low dielectric constant is used for the upper dielectric layer, the antenna has a wider band and higher efficiency.・ Compared with the conventional technology, when a material with a high dielectric constant is used for the upper dielectric layer, the radiation conductor can be made smaller.
【００２９】さらに、開口部の上層の誘電体層の厚さ
を、給電線路層と異なる厚さの誘電体層とすることで、
以下の効果が得られる。 ・ トリプレート線路内での高次モードの発生を抑制で
き、給電線路での損失の低減が可能となる。Further, by making the thickness of the upper dielectric layer of the opening portion different from that of the feed line layer,
The following effects can be obtained. -The occurrence of higher-order modes in the triplate line can be suppressed and the loss in the power supply line can be reduced.
【図１】本発明の一実施例によるトリプレート線路給電
平面アンテナを示す分解斜視図である。FIG. 1 is an exploded perspective view showing a triplate line-fed planar antenna according to an embodiment of the present invention.
【図２】一実施例によるトリプレート線路給電平面アン
テナの反射損の周波数特性を示す特性図である。FIG. 2 is a characteristic diagram showing a frequency characteristic of reflection loss of a triplate line-fed planar antenna according to an example.
【図３】本発明の他の実施例によるトリプレート線路給
電平面アンテナを示す分解斜視図である。FIG. 3 is an exploded perspective view showing a triplate line-fed planar antenna according to another embodiment of the present invention.
【図４】従来のトリプレート線路給電平面アンテナの一
例を示す分解斜視図である。FIG. 4 is an exploded perspective view showing an example of a conventional triplate line feed plane antenna.
【図５】従来のスロット結合平面アンテナの一例を示す
分解斜視図である。FIG. 5 is an exploded perspective view showing an example of a conventional slot-coupled plane antenna.
１１，２１ 放射導体 １２，１５，１７，２２，２５，２７ 誘電体層 １３，１８，２３，２８ 地導体 １４，２４ 開口部 １６，２６ 給電線路 ２９ λg ／４整合回路 11,21 Radiation conductor 12,15,17,22,25,27 Dielectric layer 13,18,23,28 Ground conductor 14,24 Opening 16,26 Feed line 29 λg / 4 matching circuit
Claims (3)
体で遮蔽したトリプレート線路を給電に用いると共に、 上記トリプレート線路の上部地導体に開口部を設け、該
開口部の上層に誘電体層を介して放射導体を配置し、 上記開口部を上記放射導体よりも大きくした平面アンテ
ナ。1. A triplate line in which the upper and lower sides of a feed line are shielded by a ground conductor through a dielectric layer is used for power feeding, and an opening is provided in an upper ground conductor of the triplate line, and an upper layer is formed on the opening. A planar antenna in which a radiation conductor is arranged via a dielectric layer and the opening is larger than the radiation conductor.
電線路層と異なる誘電率を有する誘電体層を用いた請求
項１記載の平面アンテナ。2. The planar antenna according to claim 1, wherein a dielectric layer having a dielectric constant different from that of the feed line layer is used as the dielectric layer above the opening.
給電線路層と異なる厚さの誘電体層とした請求項１又は
請求項２記載の平面アンテナ。3. The thickness of the dielectric layer above the opening is
The planar antenna according to claim 1 or 2, wherein the dielectric layer has a thickness different from that of the feed line layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9769094A JPH07307612A (en) | 1994-05-11 | 1994-05-11 | Plane antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9769094A JPH07307612A (en) | 1994-05-11 | 1994-05-11 | Plane antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07307612A true JPH07307612A (en) | 1995-11-21 |
Family
ID=14198956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9769094A Pending JPH07307612A (en) | 1994-05-11 | 1994-05-11 | Plane antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07307612A (en) |
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