JPH02113605A - Micro strip antenna - Google Patents
Micro strip antennaInfo
- Publication number
- JPH02113605A JPH02113605A JP26696188A JP26696188A JPH02113605A JP H02113605 A JPH02113605 A JP H02113605A JP 26696188 A JP26696188 A JP 26696188A JP 26696188 A JP26696188 A JP 26696188A JP H02113605 A JPH02113605 A JP H02113605A
- Authority
- JP
- Japan
- Prior art keywords
- conductor plate
- conductor
- plate
- circular
- dielectric
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 80
- 239000000758 substrate Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はマイクロストリ、ツブアンテナに関し、特に
アレーアンテナ用のマイクロストす・ツブアンテナに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a microstrip antenna and a tube antenna, and particularly to a microstrip antenna for an array antenna.
第３図ａ）、 ｂ）は例えばオーム社の「アンテナ工
学ハンドブック」の １１０頁の図３．７５に示されて
いる従来のマイクロストリップアンテナの平面図、及び
断面図である。図において、１は放射導体、２は接地導
体、３は誘電体、４は給電点、５は放射導体１の中心、
６は給電線、７は給電線に接続された同軸線路、１０は
放射導体１と接地導体２とを接続するスルーホールメッ
キである。Figures 3a) and 3b) are a plan view and a cross-sectional view of a conventional microstrip antenna shown in Figure 3.75 on page 110 of Ohm's "Antenna Engineering Handbook", for example. In the figure, 1 is the radiation conductor, 2 is the ground conductor, 3 is the dielectric, 4 is the feeding point, 5 is the center of the radiation conductor 1,
Reference numeral 6 denotes a power supply line, 7 a coaxial line connected to the power supply line, and 10 a through-hole plating connecting the radiation conductor 1 and the ground conductor 2.
従来のマイクロストリップアンテナは上記のように構成
されているので、同軸線路７から給電線６を通して放射
導体１の給電点４へ電力を供給すると、放射導体１と接
地導体２とに挟まれた誘電体３の内部電界は放射導体１
の端部で極値を取るように共振し、放射導体の端部から
空間へ電波が放射される。Since the conventional microstrip antenna is configured as described above, when power is supplied from the coaxial line 7 to the feed point 4 of the radiation conductor 1 through the feed line 6, the dielectric sandwiched between the radiation conductor 1 and the ground conductor 2 The internal electric field of body 3 is radiating conductor 1
It resonates to reach an extreme value at the end of the radiation conductor, and radio waves are radiated into space from the end of the radiation conductor.
従来のマイクロストリップアンテナは、以上のように構
成されているので、誘電体の比誘電率をεｒとするとＴ
ＭＩＩモード励振で使用する時、直径が約０．５８８／
εｒ波長の寸法となり、アレーとして使用する時に相互
結合が大きくなるという課題があった。又、インピーダ
ンス整合を必要とする場合は整合回路を設ける場所がな
いという課題があった。Since the conventional microstrip antenna is constructed as described above, if the relative permittivity of the dielectric is εr, then T
When used in MII mode excitation, the diameter is approximately 0.588/
εr wavelength, and there was a problem that mutual coupling becomes large when used as an array. Further, when impedance matching is required, there is a problem that there is no place to install a matching circuit.
この発明は上記のような課題を解消するためになされた
ものでアンテナ寸法が小さくできると共に、インピーダ
ンス整合回路を容易に設けることのできるマイクロスト
リップアンテナを得ることを目的とする。The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a microstrip antenna in which the antenna size can be reduced and an impedance matching circuit can be easily provided.
この発明に係るマイクロストリップアンテナは誘電体板
の上面に形成した円環導体板と、誘電体板の下面に形成
した接地導体板と、円環導体板によって取り囲まれた誘
電体板の表面に形成し、かつ、接地導体板とスルーホー
ルメッキによって電気的に接続した上面導体板と、上面
導体板上に形成した誘電体基板上に」二面導体板を接地
導体として形成したマイクロ波回路とから構成し、しか
も同軸内導体よりマイクロ波回路を介して円環導体板に
給電するようにしたものである。The microstrip antenna according to the present invention includes a circular conductor plate formed on the upper surface of the dielectric plate, a ground conductor plate formed on the lower surface of the dielectric plate, and a microstrip antenna formed on the surface of the dielectric plate surrounded by the circular conductor plate. and a top conductor plate electrically connected to the ground conductor plate by through-hole plating, and a microwave circuit in which a two-sided conductor plate is formed as a ground conductor on a dielectric substrate formed on the top conductor plate. Moreover, power is supplied from the coaxial inner conductor to the circular conductor plate via the microwave circuit.
この発明においては、放射導体として内部に円形の穴が
開いた円環導体板を用いているのでアンテナ寸法を小さ
くでき、かつ、円環導体板の穴の開いている部分にマイ
クロ波回路を設けたので、インピーダンス整合を容易に
することができる。In this invention, since a circular conductor plate with a circular hole inside is used as a radiation conductor, the antenna size can be reduced, and a microwave circuit is provided in the holed part of the circular conductor plate. Therefore, impedance matching can be facilitated.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図ａ）＋ ｂ）はこの発明の一実施例を示すマイ
クロストリップアンテナの平面図、及び断面図である。FIGS. 1a) and 1b) are a plan view and a sectional view of a microstrip antenna showing an embodiment of the present invention.
図において、２． ３． ４． ６． ７は上記第３図
の従来例のマイクロストリップアンテナと同一のもので
ある。８は内部に円形の穴が開いた円環導体板、９は円
環導体板８によって取り囲まれた誘電体板３の表面に形
成された導体板、１０ａ＋１０ ｂ、 １０ ｃ、
１０ ｄ・・・は導体板９と接地導体板２を電気的に
接続しているスルーホールメッキ、１１は導体板９を接
地導体とする誘電体基板、１２はこの誘電体基板の表面
に形成されたストリップラインによるマイクロ波回路で
ある。In the figure, 2. 3. 4. 6. 7 is the same as the conventional microstrip antenna shown in FIG. 3 above. 8 is a circular conductor plate with a circular hole inside; 9 is a conductor plate formed on the surface of the dielectric plate 3 surrounded by the circular conductor plate 8; 10a+10b, 10c,
10 d... is a through-hole plating that electrically connects the conductor plate 9 and the ground conductor plate 2, 11 is a dielectric substrate with the conductor plate 9 as a ground conductor, and 12 is formed on the surface of this dielectric substrate. This is a microwave circuit using strip lines.
上記のように構成されているマイクロストリップアンテ
ナにおいては、円環導体板８の端部で電界は極値を取る
ように誘電体３内部の電界は共振するため、共振周波数
は、
Ｊｎ’ （ｋｎｍａ）”Ｎｎ’ （ｋｎｍｂ）＝Ｊ
ｎ’ （ｋｎｍｂ） ・Ｎｎ、’ （ｋｎｍａ）よ
り求められる。但し、ａ、ｂは円環導体板の内円及び外
円の半径、Ｊｎ’ （ｘＬ Ｎｎ’ （ｘ）は第
１，２種円柱関数の導関数である。ここで、例えば、Ｔ
ＭＩＩモード励振の場合、、ａ／ｂ＝Ｏ−５とすると、
ｂ＝０．２１２／εｒ波長となり、上記従来のマイクロ
ストリップアンテナの約０゜７２の寸法となる。さらに
、導体板９を接地導体板とする誘電体基板１１の表面に
形成されたストリップラインを円環導体板８で囲まれた
誘電体板３の表面に設けて、円環導体板８を給電するよ
うにしており、このラインの長さを０．２５波長とする
と円環導体の端でのインピーダンスと５０Ω線路との整
合を取ることができる。In the microstrip antenna configured as described above, the electric field inside the dielectric 3 resonates so that the electric field takes an extreme value at the end of the annular conductor plate 8, so the resonant frequency is Jn' (knma )”Nn’ (knmb)=J
It is determined from n' (knmb) ・Nn,' (knma). However, a, b are the radii of the inner circle and outer circle of the annular conductor plate, Jn' (xL Nn' (x) is the derivative of the cylindrical function of the first and second kind. Here, for example, T
In the case of MII mode excitation, if a/b=O-5, then
b=0.212/εr wavelength, which is the dimension of about 0.72 degrees of the conventional microstrip antenna. Further, a strip line formed on the surface of the dielectric substrate 11 with the conductor plate 9 as a ground conductor plate is provided on the surface of the dielectric plate 3 surrounded by the annular conductor plate 8, and the annular conductor plate 8 is used to supply power. If the length of this line is 0.25 wavelength, the impedance at the end of the circular conductor can be matched with the 50Ω line.
このような本実施例によれば、円環導体板８を放射導体
とし、円環導体板８の円形の穴の内部にマイクロ波回路
を設けるようにしたので、アンテナ寸法を小さくでき、
インピーダンス整合が良く、しかも損失の小さいマイク
ロストリップアンテナを得ることができる。According to this embodiment, the annular conductor plate 8 is used as a radiation conductor, and the microwave circuit is provided inside the circular hole of the annular conductor plate 8, so the antenna size can be reduced.
A microstrip antenna with good impedance matching and low loss can be obtained.
また、第２図ａ）、 ｂ）はこの発明の他の実施例に
によるマイクロストリップアンテナを示す平面図。Further, FIGS. 2a) and 2b) are plan views showing a microstrip antenna according to another embodiment of the present invention.
及び断面図である。図において’１ ２． ３． ４．
６゜７．８，９．１０ａ 〜１０ｄは第１図と同じも
のである。１４は導体板９を接地導体板とするマイクロ
波集積回路、１５はこのマイクロ波集積回路１４を給電
している給電線６に接続されたコネクタ、１６ａ＋
１６ｂはマイクロ波集積回路１４の入出力端子、１７は
この入出力端子１６ｂと円環導体板８を接続している接
続導体である。and a cross-sectional view. In the figure '1 2. 3. 4.
6°7.8, 9.10a to 10d are the same as in FIG. 14 is a microwave integrated circuit using the conductor plate 9 as a grounding conductor plate; 15 is a connector connected to the power supply line 6 feeding the microwave integrated circuit 14; and 16a+
16b is an input/output terminal of the microwave integrated circuit 14, and 17 is a connecting conductor connecting the input/output terminal 16b and the circular conductor plate 8.
上記のように構成されているマイクロストリップアンテ
ナにおいては、上記実施例と同様の効果を有するととも
に、円環導体板８に囲まれた部分、即ち、放射素子であ
る円環導体板８に近い位置に整合回路や増幅器を設けた
マイクロ波集積回路１４を設置したので、受信時には受
信した微弱な電波を効率良り、シかも低損失でローノイ
ズ増幅器へ導くことができるようになり、低雑音化が可
能となる。In the microstrip antenna configured as described above, it has the same effect as the above embodiment, and a portion surrounded by the annular conductor plate 8, that is, a position close to the annular conductor plate 8 which is a radiating element. Since the microwave integrated circuit 14 equipped with a matching circuit and an amplifier is installed in the receiver, the received weak radio waves can be guided to the low-noise amplifier with high efficiency and low loss during reception, resulting in lower noise. It becomes possible.
以」二のように、この発明によれば下面に接地導体が形
成された誘電体板の上面に放射素子として円環導体板を
設け、しかも、その円環導体板で囲まれた誘電体の表面
に形成された導体板を接地導体板とするマイクロ波、回
路を設けて、同軸内導体よりマイクロ波回路を介して円
環導体板に給電をするようにしたので、アンテナ寸法を
小さくできるとともにインピーダンス整合を容易にでき
、小型、軽量でしかも損失の小さいマイクロストリップ
アンテナを提供できる効果がある。As described in 2 below, according to the present invention, a circular conductor plate is provided as a radiating element on the upper surface of a dielectric plate with a ground conductor formed on the lower surface, and moreover, the dielectric body surrounded by the circular conductor plate is A microwave circuit is provided in which the conductor plate formed on the surface is used as a ground conductor plate, and power is supplied to the circular conductor plate via the microwave circuit from the coaxial inner conductor, so the antenna size can be reduced. This has the effect of facilitating impedance matching and providing a microstrip antenna that is small, lightweight, and has low loss.
第１図ａ）、 ｂ）は本発明の一実施例によるマイク
ロストリップアンテナを示す平面図、及び断面図、第２
図ａ）、 ｂ）図は本発明の他の実施例によるマイク
ロストリップアンテナを示す平面図、及び断面図、第３
図ａ）、 ｂ）は従来のマイクロストリップアンテナ
を示す平面図、及び断面図である。
図において、１は放射導体、２は接地導体、３は誘電体
、４は給電点、５は放射導体の中心、６は給電線、７は
同軸線路、８は円環導体板、９は導体板、１０ａ、、１
０ｂ、１０ｃ、１０ｄはスルーホールメッキ、１１は誘
電体基板、１２はストリップライン、１４はマイクロ波
集積回路、１５はコネクタ、１６ａ、１６ｂは入出力端
子、１７は接続導体である。
なお図中同一符号は同−又は相当部分を示す。Figures 1 a) and b) are a plan view and a sectional view showing a microstrip antenna according to an embodiment of the present invention, and Figure 2
Figures a) and b) are a plan view and a cross-sectional view showing a microstrip antenna according to another embodiment of the present invention.
Figures a) and b) are a plan view and a sectional view showing a conventional microstrip antenna. In the figure, 1 is the radiation conductor, 2 is the ground conductor, 3 is the dielectric, 4 is the feed point, 5 is the center of the radiation conductor, 6 is the feed line, 7 is the coaxial line, 8 is the circular conductor plate, and 9 is the conductor. Board, 10a, 1
0b, 10c, and 10d are through-hole platings, 11 is a dielectric substrate, 12 is a strip line, 14 is a microwave integrated circuit, 15 is a connector, 16a, 16b are input/output terminals, and 17 is a connecting conductor. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
成された、放射素子である円環導体板と、該円環導体板
によって取り囲まれた上記誘電体板の表面に形成され、
かつ、上記接地導体板とスルーホールメッキによって電
気的に接続された上面導体板と、 該上面導体板上に形成された誘電体基板上に、上記上面
導体板を接地導体として構成され、同軸内導体に接続さ
れたマイクロ波回路とを備え、上記同軸内導体より上記
マイクロ波回路を介して上記円環導体板に給電するよう
にしたことを特徴とするマイクロストリップアンテナ。[Scope of Claims] 1) An annular conductor plate, which is a radiating element, formed on the upper surface of a dielectric plate having a ground conductor plate formed on the lower surface, and the dielectric plate surrounded by the annular conductor plate. formed on the surface of
and a top conductor plate electrically connected to the ground conductor plate by through-hole plating, and a dielectric substrate formed on the top conductor plate, with the top conductor plate serving as a ground conductor, and a coaxial A microstrip antenna comprising: a microwave circuit connected to a conductor, and power is supplied from the coaxial inner conductor to the annular conductor plate via the microwave circuit.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26696188A JPH0652850B2 (en) | 1988-10-21 | 1988-10-21 | Microstrip antenna |
| US07/363,050 US4987421A (en) | 1988-06-09 | 1989-06-08 | Microstrip antenna |
| CA000602331A CA1328503C (en) | 1988-06-09 | 1989-06-09 | Microstrip antenna |
| AU36274/89A AU614625B2 (en) | 1988-06-09 | 1989-06-09 | Microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26696188A JPH0652850B2 (en) | 1988-10-21 | 1988-10-21 | Microstrip antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02113605A true JPH02113605A (en) | 1990-04-25 |
| JPH0652850B2 JPH0652850B2 (en) | 1994-07-06 |
Family
ID=17438103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26696188A Expired - Fee Related JPH0652850B2 (en) | 1988-06-09 | 1988-10-21 | Microstrip antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652850B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03127521A (en) * | 1989-10-13 | 1991-05-30 | Matsushita Electric Ind Co Ltd | Radio receiver |
| JPH0480114U (en) * | 1990-11-27 | 1992-07-13 | ||
| US5675346A (en) * | 1995-03-23 | 1997-10-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Annular microstrip antenna element and radial line antenna system employing the same |
| US11588243B2 (en) | 2019-04-24 | 2023-02-21 | Murata Manufacturing Co., Ltd. | Antenna module and communication apparatus equipped with the same |
-
1988
- 1988-10-21 JP JP26696188A patent/JPH0652850B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03127521A (en) * | 1989-10-13 | 1991-05-30 | Matsushita Electric Ind Co Ltd | Radio receiver |
| JPH0480114U (en) * | 1990-11-27 | 1992-07-13 | ||
| JP2507935Y2 (en) * | 1990-11-27 | 1996-08-21 | ヒロセ電機株式会社 | Circularly polarized loop antenna |
| US5675346A (en) * | 1995-03-23 | 1997-10-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Annular microstrip antenna element and radial line antenna system employing the same |
| US11588243B2 (en) | 2019-04-24 | 2023-02-21 | Murata Manufacturing Co., Ltd. | Antenna module and communication apparatus equipped with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0652850B2 (en) | 1994-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |