JPH0693570B2 - Antenna device - Google Patents
Antenna deviceInfo
- Publication number
- JPH0693570B2 JPH0693570B2 JP60188110A JP18811085A JPH0693570B2 JP H0693570 B2 JPH0693570 B2 JP H0693570B2 JP 60188110 A JP60188110 A JP 60188110A JP 18811085 A JP18811085 A JP 18811085A JP H0693570 B2 JPH0693570 B2 JP H0693570B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor plate
- antenna device
- housing
- metal
- conductor
- 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 - Lifetime
Links
Landscapes
- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は，インピーダンス特性の優れた小形のアンテ
ナ装置に関するものである。TECHNICAL FIELD The present invention relates to a small antenna device having excellent impedance characteristics.
従来のこの種のアンテナ装置を第５図に示す。図におい
て，（１）は給電素子，（２）は導体板，（３）は金属
材から成る筐体，（４）は接地導体である。このアンテ
ナ装置は以上のように構成され給電素子（１）を介して
給電された電力は，導体板（２）と筐体（３）の間に電
波を励振する。この電波は導体板（２）のエツジ部分を
通つて空間に放射される。導体板（２）の大きさが波長
に比べて小さい場合には，接地導体（４）は有効にこの
アンテナ装置の共振周波数を下げる働きをする。A conventional antenna device of this type is shown in FIG. In the figure, (1) is a feeding element, (2) is a conductor plate, (3) is a housing made of a metal material, and (4) is a ground conductor. This antenna device is configured as described above, and the electric power fed through the feeding element (1) excites a radio wave between the conductor plate (2) and the housing (3). This radio wave is radiated into the space through the edge portion of the conductor plate (2). When the size of the conductor plate (2) is smaller than the wavelength, the ground conductor (4) effectively functions to lower the resonance frequency of the antenna device.
上記のように構成された従来のアンテナ装置では，導体
板（２）と筐体（３）の間隔を狭めて行くと，給電素子
（１）の給電点からみた入力インピーダンスは悪くな
り，短絡状態に近づいて行く。したがつて，波長に比べ
て十分小さいアンテナ装置を構成しようとすれば接地導
体（４）だけではその効果が少なく，共振させることが
困難であるという問題点があつた。In the conventional antenna device configured as described above, when the distance between the conductor plate (2) and the housing (3) is narrowed, the input impedance of the feeding element (1) as seen from the feeding point is deteriorated and the short-circuited state occurs. Approach. Therefore, if it is attempted to construct an antenna device that is sufficiently smaller than the wavelength, there is a problem in that the ground conductor (4) alone has little effect and it is difficult to resonate.
この発明は，かかる問題点を解決するためになされたも
ので，導体板（２）と筐体（３）の間隔を十分狭めた場
合にも共振するアンテナ装置を得ることを目的とする。The present invention has been made to solve such a problem, and an object thereof is to obtain an antenna device that resonates even when the distance between the conductor plate (2) and the housing (3) is sufficiently narrowed.
この発明に係わるアンテナ装置は、金属材からなる筐体
と、この筐体に近接して配置された導体板と、これら筐
体と導体板との間を接続する接続導体と、上記筐体と導
体板との間で給電する給電素子とを備えたアンテナ装置
において、上記筐体と導体板からなるスロットの開口部
の端部を外れた内部に開口部に沿った方向に延在する金
属部材から成る等価的キャパシタンスを介在させたもの
である。An antenna device according to the present invention includes a housing made of a metal material, a conductor plate arranged in the vicinity of the housing, a connection conductor connecting the housing and the conductor plate, and the housing. In an antenna device provided with a feeding element for feeding between a conductor plate and a conductor plate, a metal member extending in a direction along the opening inside the slot formed of the casing and the conductor plate outside the end of the opening. And an equivalent capacitance consisting of
この発明においては，金属ブリツジ板あるいは金属ブロ
ツク等の金属部材が等価的にキヤパシタンスの働きを
し，短絡状態に近づく入力インピーダンスを良くし，ア
ンテナを共振状態にする。In the present invention, a metal member such as a metal bridge plate or a metal block equivalently acts as capacitance, improves the input impedance approaching a short circuit state, and brings the antenna into a resonance state.
第１図はこの発明の一実施例を示すアンテナ装置の斜視
図であり，図において，（１）〜（４）は上記従来の装
置の部材と同一又は同等の部材である。（５）は金属材
の板をコ字状に折り曲げた金属ブリツジ板であり，その
両端を筐体（３）に接地し，かつ，導体板（２）と筐体
（３）の間に設けられている。FIG. 1 is a perspective view of an antenna device showing an embodiment of the present invention. In the drawing, (1) to (4) are the same or equivalent members as the members of the conventional device. (5) is a metal bridge plate in which a metal plate is bent in a U shape, both ends of which are grounded to the casing (3) and provided between the conductor plate (2) and the casing (3). Has been.
上記のように構成されたアンテナ装置においては，導体
板（２）と金属ブリツジ板（５）の間の部分が等価的に
キヤパシタンスの働きをし，導体板（２）と筐体（３）
の間隔を狭めた場合の入力インピーダンス特性は良くな
ることになる。In the antenna device configured as described above, the portion between the conductor plate (2) and the metal bridge plate (5) acts equivalently as capacitance, and the conductor plate (2) and the housing (3)
The input impedance characteristics will be improved when the interval is narrowed.
第２図はこの実施例の場合の入力インピーダンス特性を
示す特性曲線図である。図において，（６）は金属ブリ
ツジ板なしの場合の入力インピーダンス特性であり，導
体板（２）と筐体（３）の間隔は0.006λ（λ；波長）
である。（７）は金属ブリツジ板ありの場合の入力イン
ピーダンス特性である。すなわち，金属ブリツジ板
（５）により等価的に並列にキヤパシタンスが入つたこ
とになり，このアンテナ装置は共振していることがわか
る。なお，図中，f0は中心周波数を示す。FIG. 2 is a characteristic curve diagram showing the input impedance characteristic in the case of this embodiment. In the figure, (6) is the input impedance characteristic without a metal bridge plate, and the distance between the conductor plate (2) and the housing (3) is 0.006λ (λ; wavelength).
Is. (7) is the input impedance characteristic when the metal bridge plate is present. That is, the capacitance is equivalently inserted in parallel by the metal bridge plate (5), and it is understood that this antenna device resonates. In the figure, f 0 represents the center frequency.
第３図はこの発明の他の実施例を示すアンテナ装置の斜
視図である。図において，（１）〜（４）は第５図の従
来の装置の部材と同一又は同等部材である。（８）は金
属材から成る金属ブロツクであり，筐体（３）に接地し
て設けられている。この実施例の場合にも導体板（２）
と金属ブロツク（８）の間の部分が等価的にキヤパシタ
ンスの働きをし，第１図の実施例の場合と同様に，導体
板（２）と筐体（３）の間隔を狭めた場合の入力インピ
ーダンス特性は良くなる。FIG. 3 is a perspective view of an antenna device showing another embodiment of the present invention. In the figure, (1) to (4) are the same or equivalent members as the members of the conventional apparatus of FIG. Reference numeral (8) is a metal block made of a metal material, which is grounded to the housing (3). Also in the case of this embodiment, the conductor plate (2)
The portion between the metal block (8) and the metal block (8) acts equivalently as capacitance, and when the distance between the conductor plate (2) and the housing (3) is narrowed as in the case of the embodiment of FIG. The input impedance characteristic is improved.
第４図はこの発明のさらに他の実施例を示すアンテナ装
置の斜視図である。図において，（１）〜（４）は第５
図の従来の装置の部材と同一又は同等の部材である。ま
た，（５）は第１図の実施例と同じ金属ブリツジ板であ
る。（91），（92）は誘電体であり，金属ブリツジ板
（５）は誘電体（91）と誘電体（92）の間に設けられて
いる。この実施例では金属ブリツジ板（５）を介在させ
るために誘電体（91），（92）を別体としたがこれらの
誘電体（91），（92）は一体化して装荷してもよい。そ
こで，この誘電体（91），（92）の中では，電波の波長
が短縮されるので，導体板（２）の大きさが誘電体（9
1），（92）がない場合の寸法に等しいとき，このアン
テナは共振し易くなることになる。FIG. 4 is a perspective view of an antenna device showing still another embodiment of the present invention. In the figure, (1) to (4) are the fifth
It is the same as or equivalent to the member of the conventional device shown in the figure. Further, (5) is the same metal bridge plate as in the embodiment of FIG. (91) and (92) are dielectrics, and the metal bridge plate (5) is provided between the dielectrics (91) and (92). In this embodiment, the dielectrics (91) and (92) are separate bodies in order to interpose the metal bridge plate (5), but these dielectrics (91) and (92) may be integrated and loaded. . Therefore, in the dielectrics (91) and (92), since the wavelength of the radio wave is shortened, the size of the conductor plate (2) is smaller than that of the dielectric (9).
When the dimensions are the same as when (1) and (92) are not present, this antenna will easily resonate.
なお、上記の説明では，電波の送信の場合について説明
したが，勿論，電波の受信の場合に適用してもよい。ま
た，導体板（２）の形状は多角形，円形などでもよく，
さらに筐体の形状も六面体に限つたものではない。ま
た，金属ブリツジ板（５），金属ブロツク（８）は等価
的にキヤパシタンスの効果を与えればよく，したがつ
て，筐体に接地せず，導体板に接地してもよい。また，
これらの金属ブリツジ板（５），金属ブロツク（８）を
複数個用いてもよい。In the above description, the case of transmitting radio waves has been described, but of course, it may be applied to the case of receiving radio waves. Also, the shape of the conductor plate (2) may be polygonal, circular, etc.,
Further, the shape of the housing is not limited to the hexahedron. Further, the metal bridge plate (5) and the metal block (8) may be equivalently provided with the effect of capacitance, so that they may be grounded to the conductor plate without being grounded to the case. Also,
A plurality of these metal bridge plates (5) and metal blocks (8) may be used.
この発明は以上説明したとおり、金属材からなる筐体
と、この筐体に近接して配置された導体板と、これら筐
体と導体板との間を接続する接続導体と、上記筐体と導
体板との間で給電する給電素子とを備えたアンテナ装置
において、上記筐体と導体板からなるスロットの開口部
の端部を外れた内部に金属部材から成る等価的キャパシ
タンスを介在させたので、開口部の端部の電界よりも小
さい電界の部分で容量を装荷するので、容量を形成する
部材の寸法精度を低くすることができるという効果を奏
する。As described above, the present invention includes a housing made of a metal material, a conductor plate arranged in the vicinity of the housing, a connection conductor connecting the housing and the conductor plate, and the housing. In an antenna device including a feeding element that feeds between a conductor plate and an equivalent capacitance made of a metal member is provided inside the housing and the end of the opening of the slot made of the conductor plate. Since the capacitance is loaded in the part of the electric field smaller than the electric field at the end of the opening, the dimensional accuracy of the member forming the capacitance can be reduced.
また、上記の金属部材として開口部に沿った方向に延在
する金属部材を用いたので導体板と筐体間の電界を均一
に保ち、放射特性を劣化させないという効果を奏する。Further, since the metal member extending in the direction along the opening is used as the above-mentioned metal member, there is an effect that the electric field between the conductor plate and the housing is kept uniform and the radiation characteristic is not deteriorated.
第１図はこの発明の一実施例を示すアンテナ装置の斜視
図，第２図は上記アンテナ装置の入力インピーダンス特
性を示す特性曲線図，第３図はこの発明の他の実施例を
示すアンテナ装置の斜視図，第４図はこの発明のさらに
他の実施例を示すアンテナ装置の斜視図，第５図は従来
のアンテナ装置を示す斜視図である。 図において，（１）は給電素子，（２）は導体板，
（３）は筐体，（４）は接地導体，（５）は金属ブリツ
ジ板，（８）は金属ブロツク，（91），（92）は誘電体
である。 なお，各図中，同一符号は同一又は相当部分を示す。1 is a perspective view of an antenna device showing an embodiment of the present invention, FIG. 2 is a characteristic curve diagram showing an input impedance characteristic of the antenna device, and FIG. 3 is an antenna device showing another embodiment of the present invention. FIG. 4 is a perspective view of an antenna device showing still another embodiment of the present invention, and FIG. 5 is a perspective view showing a conventional antenna device. In the figure, (1) is a feeding element, (2) is a conductor plate,
(3) is a housing, (4) is a ground conductor, (5) is a metal bridge plate, (8) is a metal block, and (91) and (92) are dielectrics. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
て配置された導体板と、これら筐体と導体板との間を接
続する接続導体と、上記筐体と導体板との間で給電する
給電素子とを備えたアンテナ装置において、上記筐体と
導体板からなるスロットの開口部の端部を外れた内部に
開口部に沿った方向に延在する金属部材から成る等価的
キャパシタンス素子を介在させたことを特徴とするアン
テナ装置。1. A case made of a metal material, a conductor plate arranged in the vicinity of the case, a connection conductor connecting the case and the conductor plate, and the case and the conductor plate. In an antenna device provided with a feeding element for feeding between the two, an equivalent of a metal member extending in a direction along the opening inside the slot formed of the casing and the conductor plate, which is outside the end of the opening. An antenna device characterized by interposing a dynamic capacitance element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188110A JPH0693570B2 (en) | 1985-08-27 | 1985-08-27 | Antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188110A JPH0693570B2 (en) | 1985-08-27 | 1985-08-27 | Antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6248109A JPS6248109A (en) | 1987-03-02 |
| JPH0693570B2 true JPH0693570B2 (en) | 1994-11-16 |
Family
ID=16217874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60188110A Expired - Lifetime JPH0693570B2 (en) | 1985-08-27 | 1985-08-27 | Antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693570B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5997836A (en) * | 1995-09-01 | 1999-12-07 | Mizusawa Industrial Chemicals, Ltd. | Alkali aluminum complex hydroxide carbonate salt, and a process for producing said salt and its uses |
| FR2867904A1 (en) | 2004-03-22 | 2005-09-23 | Thomson Licensing Sa | ELECTROMAGNETIC WAVE RECEIVING AND DECODING SYSTEM WITH COMPACT ANTENNA |
| WO2006011459A1 (en) * | 2004-07-28 | 2006-02-02 | Osaka University | Patch antenna and method for manufacturing patch antenna |
| US20110122041A1 (en) * | 2008-07-30 | 2011-05-26 | Nec Corporation | Planar antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61251208A (en) * | 1985-04-26 | 1986-11-08 | Nec Corp | Microstrip antenna |
-
1985
- 1985-08-27 JP JP60188110A patent/JPH0693570B2/en not_active Expired - Lifetime
Non-Patent Citations (2)
| Title |
|---|
| 昭和５９年度電子通信学会通信部門全国大会６２４ |
| 昭和６０年度電子通信学会通信部門全国大会Ｓ５−１ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6248109A (en) | 1987-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |