JPH0222563B2 - - Google Patents
Info
- Publication number
- JPH0222563B2 JPH0222563B2 JP59099858A JP9985884A JPH0222563B2 JP H0222563 B2 JPH0222563 B2 JP H0222563B2 JP 59099858 A JP59099858 A JP 59099858A JP 9985884 A JP9985884 A JP 9985884A JP H0222563 B2 JPH0222563 B2 JP H0222563B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- radio device
- point
- radio
- conductive
- 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
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は主としてUHF帯を使用する携帯無
線機用のアンテナに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an antenna for a portable radio device that mainly uses the UHF band.
従来この種のアンテナとして第１図に示すもの
があつた。図において、１は無線機本体、２はこ
の無線機本体に着脱可能に装着されたホイツプ形
アンテナである。第２図はこのホイツプ形アンテ
ナ２の電流分布を点線で示す説明図で、アンテナ
２の長さが、送受信する電波の波長の1/4である
ときに第２図に点線で示すような電流定在波が生
じてアンテナ効率が最大になる。アンテナ２の長
さが、波長の1/4より短いときは第３図に示すよ
うにローデイングコイル３を設けてアンテナ２を
送受信波長に同調するのであるが、ローデイング
コイルを挿入することによつてアンテナの効率が
低下する。
A conventional antenna of this type is shown in FIG. In the figure, 1 is a radio device main body, and 2 is a whip-shaped antenna detachably attached to the radio device main body. Figure 2 is an explanatory diagram showing the current distribution of this whip-shaped antenna 2 using dotted lines.When the length of the antenna 2 is 1/4 of the wavelength of the radio waves to be transmitted and received, the current distribution as shown by the dotted lines in Figure 2 A standing wave is created and the antenna efficiency is maximized. When the length of the antenna 2 is shorter than 1/4 of the wavelength, a loading coil 3 is provided as shown in Figure 3 to tune the antenna 2 to the transmitting and receiving wavelength. Therefore, the efficiency of the antenna decreases.
以上のように構成された従来のアンテナでは波
長の1/4の長さを有するホイツプ形アンテナ２が
無線機１から突出しているため、アンテナ２を波
損したり、アンテナ２で目等を突く危険性があ
り、持ち歩きに不便であつたり、着脱を繰返して
いるうちに着脱部が破損したり接触不良を起す等
の欠点があつた。また、アンテナ２の長さを充分
に短くし大きなローデイングコイル３を入れて同
調をとるとアンテナ２の効率が著しく低下すると
いう欠点があつた。 In the conventional antenna configured as described above, the whip-shaped antenna 2, which has a length of 1/4 of the wavelength, protrudes from the radio device 1, so there is a risk of damaging the antenna 2 or hitting your eyes with the antenna 2. It has drawbacks such as being bulky and inconvenient to carry around, and the attachment/detachment part may break or contact failure occurs when repeatedly attached and detached. Another disadvantage is that when the length of the antenna 2 is sufficiently shortened and a large loading coil 3 is inserted to achieve tuning, the efficiency of the antenna 2 is significantly reduced.
この発明は上記のような従来のものの欠点を除
去するためになされたもので、この発明では無線
機筐体を接地体とするとき、この接地体に対し静
電容量を形成する導体板をアンテナとし、アンテ
ナの同調整合には給電線で構成したインピーダン
ススタブを用いることにした。
This invention was made in order to eliminate the drawbacks of the conventional ones as described above. In this invention, when the radio device casing is used as a grounding body, a conductive plate that forms a capacitance with respect to this grounding body is connected to the antenna. Therefore, we decided to use an impedance stub consisting of a feeder line for antenna tuning.
以下この発明の実施例を図面について説明す
る。第４図はこの発明の一実施例を示す斜視図で
あつて、図において１は第１図の１と同じく無線
機本体を示し導電性筐体内に無線機を内蔵しこの
導電性筐体には無線機の接地端子が接続される。
４はこの導電性筐体との間に静電容量を形成する
ように設けられた導体板、５は無線機本体１に取
付けられた同軸形のアンテナ接続端子、６は端子
５と導体板４を接続する同軸形の給電線（但しそ
の中心導体だけが導体板４に接続されるので、６
を給電用導体棒で構成することもできる）、７は
給電線６上の所定の点から分枝してその他端が無
線機本体１の導電性筐体上の所定の点に接続され
て短絡されインピーダンススタブを構成する同軸
形の整合用給電線である。８は無線機本体１及び
導体板４をおおい、これらを支持する構造を有す
る樹脂製のカバーである。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a perspective view showing an embodiment of the present invention, and in the figure, 1 indicates a radio device body as in 1 of FIG. 1, and the radio device is built in a conductive case. is connected to the ground terminal of the radio.
Reference numeral 4 indicates a conductive plate provided to form a capacitance between the conductive case, 5 indicates a coaxial antenna connection terminal attached to the radio body 1, and 6 indicates the terminal 5 and the conductive plate 4. (However, since only its center conductor is connected to conductor plate 4,
(can also be composed of a conductor rod for power supply), 7 is branched from a predetermined point on the power supply line 6, and the other end is connected to a predetermined point on the conductive case of the radio main body 1 to prevent a short circuit. This is a coaxial matching feed line that constitutes an impedance stub. Reference numeral 8 denotes a resin cover having a structure to cover and support the radio main body 1 and the conductor plate 4.
第５図は第４図に示すアンテナ構成を等価的に
示す説明図で、第４図と同一符号は同一部分を示
し、導体板４が無線機本体１の導電性筐体に対す
る静電容量から、いわゆるトツプローデイング形
のアンテナを構成し、アンテナの実際の高さが低
くてもアンテナ効率が低下しないことは従来知ら
れているとおりである。 FIG. 5 is an explanatory diagram equivalently showing the antenna configuration shown in FIG. 4, in which the same reference numerals as in FIG. It is conventionally known that the antenna constitutes a so-called top-loading type antenna, and that the antenna efficiency does not decrease even if the actual height of the antenna is low.
第６図はこのアンテナのインピーダンス整合の
原理を示す図で、第６図ａは整合部の構成を示す
断面図、同図ｂはその等価回路を示す接続図であ
る。第６図において第４図と同一符号は同一部分
を示し、給電線６と７の分枝点Ａ点の位置と、Ａ
点から給電線７の短絡点Ｂ点までの長さを調整す
ることは、第６図ｂに示す等価回路でl1とl2の長
さを調整することを意味し、導体板４の給電点イ
ンピーダンスZrがどのような値であつても給電
線６の特性インピーダンスZoに整合させること
ができる。 FIG. 6 is a diagram showing the principle of impedance matching of this antenna, FIG. 6a is a sectional view showing the configuration of the matching section, and FIG. 6b is a connection diagram showing its equivalent circuit. In FIG. 6, the same reference numerals as in FIG. 4 indicate the same parts, and the position of the branch point A of the feeder lines 6 and 7,
Adjusting the length from the point to the short-circuit point B of the feed line 7 means adjusting the lengths l 1 and l 2 in the equivalent circuit shown in FIG. No matter what value the point impedance Zr has, it can be matched to the characteristic impedance Zo of the feed line 6.
なお、上記実施例では給電線６，７に同軸形の
給電線を用いたが、板状又は平行２線状の給電線
を用い又は導波管を用いて構成してもよく、一般
的に高周波電力の伝送路で構成すればよろしい。 In the above embodiment, coaxial feeder lines are used for the feeder lines 6 and 7, but they may also be configured using plate-shaped or parallel two-wire feeder lines, or by using a waveguide. It is sufficient if it is configured with a transmission line for high frequency power.
第７図はこの発明の他の実施例を示す斜視図で
あつて、第４図と同一符号は同一部分を示し、９
はプリント基板であつて、給電線６，７はプリン
ト基板９上に形成される。 FIG. 7 is a perspective view showing another embodiment of the present invention, in which the same reference numerals as in FIG. 4 indicate the same parts, and 9
is a printed circuit board, and the power supply lines 6 and 7 are formed on the printed circuit board 9.
また、導体板４は第４図に示すような長方形の
他に円形、多角形、其他任意の形のものでよい。 Further, the conductor plate 4 may be of any shape other than a rectangle as shown in FIG. 4, such as a circle, a polygon, or any other shape.
以上のようにこの発明によれば、インピーダン
ススタブにより整合されるトツプローデイング形
のアンテナを用いたので、アンテナ効率を低下す
ることなく、アンテナによる突出部を除去するこ
とができ、取扱が容易で破損しにくいアンテナを
得ることができる。
As described above, according to the present invention, since the top-loading type antenna matched by the impedance stub is used, the protrusion caused by the antenna can be removed without reducing the antenna efficiency, and the handling is easy. An antenna that is less likely to be damaged can be obtained.
第１図は従来のアンテナを示す斜視図、第２
図、第３図は第１図に示すアンテナの電流定在波
を示す図、第４図はこの発明の一実施例を示す斜
視図、第５図は第４図に示すアンテナ構成を等価
的に示す説明図、第６図は第４図のアンテナのイ
ンピーダンス整合の原理を示す図、第７図はこの
発明の他の実施例を示す斜視図である。
１……無線機本体、４……導体板、５……アン
テナ接続端子、６……給電線、７……インピーダ
ンススタブ、８……樹脂製のカバー、９……プリ
ント基板。尚、各図中同一符号は同一又は相当部
分を示す。
Figure 1 is a perspective view of a conventional antenna; Figure 2 is a perspective view of a conventional antenna;
3 is a diagram showing the current standing wave of the antenna shown in FIG. 1, FIG. 4 is a perspective view showing an embodiment of the present invention, and FIG. 5 is an equivalent diagram of the antenna configuration shown in FIG. 4. FIG. 6 is a diagram showing the principle of impedance matching of the antenna shown in FIG. 4, and FIG. 7 is a perspective view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Radio device body, 4...Conductor plate, 5...Antenna connection terminal, 6...Feeder line, 7...Impedance stub, 8...Resin cover, 9...Printed circuit board. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
される導電性筐体、 この導電性筐体に対し静電容量を構成するよう
に配置される導体板、 上記無線機のアンテナ接続端子と上記導体板上
の一点とを接続する高周波電力の伝送路、この伝
送路の所定の点と上記導電性筐体上の１点とを接
続しアンテナ整合のためのインピーダンススタブ
を構成する高周波電力の伝送路を備えた無線機用
アンテナ。[Scope of Claims] 1. A conductive casing containing a radio device and to which a ground terminal of the radio device is connected; a conductive plate arranged to form a capacitance with respect to the conductive casing; a high-frequency power transmission line that connects the antenna connection terminal of the machine and a point on the conductive plate; an impedance stub that connects a predetermined point of this transmission line and a point on the conductive casing for antenna matching; An antenna for radio equipment equipped with a transmission path for high-frequency power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9985884A JPS60242705A (en) | 1984-05-16 | 1984-05-16 | Antenna for radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9985884A JPS60242705A (en) | 1984-05-16 | 1984-05-16 | Antenna for radio equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60242705A JPS60242705A (en) | 1985-12-02 |
| JPH0222563B2 true JPH0222563B2 (en) | 1990-05-21 |
Family
ID=14258495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9985884A Granted JPS60242705A (en) | 1984-05-16 | 1984-05-16 | Antenna for radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60242705A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3457351B2 (en) * | 1992-09-30 | 2003-10-14 | 株式会社東芝 | Portable wireless devices |
| US6054955A (en) * | 1993-08-23 | 2000-04-25 | Apple Computer, Inc. | Folded monopole antenna for use with portable communications devices |
| US7183983B2 (en) | 2005-04-26 | 2007-02-27 | Nokia Corporation | Dual-layer antenna and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977724A (en) * | 1982-10-26 | 1984-05-04 | Nippon Telegr & Teleph Corp <Ntt> | Portable radio device |
-
1984
- 1984-05-16 JP JP9985884A patent/JPS60242705A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977724A (en) * | 1982-10-26 | 1984-05-04 | Nippon Telegr & Teleph Corp <Ntt> | Portable radio device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60242705A (en) | 1985-12-02 |
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