JPH0370410U - - Google Patents
Info
- Publication number
- JPH0370410U JPH0370410U JP13011489U JP13011489U JPH0370410U JP H0370410 U JPH0370410 U JP H0370410U JP 13011489 U JP13011489 U JP 13011489U JP 13011489 U JP13011489 U JP 13011489U JP H0370410 U JPH0370410 U JP H0370410U
- Authority
- JP
- Japan
- Prior art keywords
- radiating element
- antenna
- wavelength
- coaxial connector
- matching
- 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.)
- Pending
Links
- 230000008602 contraction Effects 0.000 claims 2
- 230000005404 monopole Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Description
第１図は本考案による携帯型無線機用アンテナ
の構造の一実施例を示す一部破断側面図、第２図
は第１図に対応するアンテナ長の説明図である。
１……放射エレメント、１ａ〜１ｃ……可動ロ
ツド、１ｄ……固定ロツド、２……ハウジング、
３……整合用コイル、４……同軸形コネクタ。
FIG. 1 is a partially cutaway side view showing an embodiment of the structure of a portable radio antenna according to the present invention, and FIG. 2 is an explanatory diagram of the antenna length corresponding to FIG. 1. 1... Radiation element, 1a to 1c... Movable rod, 1d... Fixed rod, 2... Housing,
3... Matching coil, 4... Coaxial connector.
Claims (1)
テナの構造において、 径の異なる複数のロツドを順次摺動可能に嵌め
合わせることにより伸縮自在とした放射エレメン
トを、アンテナの給電点である同軸形コネクタに
絶縁性のハウジングを介して取り付けると共に、
ハウジング内に配された整合用コイルにより前記
放射エレメントと同軸形コネクタを電気的に接続
し、 前記放射エレメントの最大伸長時には使用周波
数の1/2波長ないし3/8波長のモノポール形アンテ
ナとなり、前記放射エレメントの最短収縮時には
1/4波長のモノポール形アンテナとなるように各
ロツドの寸法と整合用コイルを設定すると共に、
放射エレメントの最大伸長時と最短収縮時におけ
る同軸形コネクタ端部でのインピーダンスを整合
させたことを特徴とする携帯型無線機用アンテナ
の構造。[Scope of Claim for Utility Model Registration] In the structure of an antenna for a portable radio device that uses radio waves in the UHF band, a radiating element that is expandable and retractable by sequentially slidingly fitting a plurality of rods with different diameters is an antenna. In addition to attaching it to the coaxial connector that is the power feeding point of the
The radiating element and the coaxial connector are electrically connected by a matching coil placed inside the housing, and when the radiating element is fully extended, it becomes a monopole antenna with 1/2 wavelength to 3/8 wavelength of the operating frequency. At the shortest contraction of the radiating element
In addition to setting the dimensions of each rod and the matching coil to create a 1/4 wavelength monopole antenna,
A structure of an antenna for a portable radio device characterized by matching the impedance at the end of a coaxial connector when the radiating element is at its maximum extension and at its shortest contraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13011489U JPH0370410U (en) | 1989-11-09 | 1989-11-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13011489U JPH0370410U (en) | 1989-11-09 | 1989-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0370410U true JPH0370410U (en) | 1991-07-15 |
Family
ID=31677707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13011489U Pending JPH0370410U (en) | 1989-11-09 | 1989-11-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0370410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200449790Y1 (en) * | 2008-04-03 | 2010-08-10 | 진영매 | A fan with writing instrument |
-
1989
- 1989-11-09 JP JP13011489U patent/JPH0370410U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200449790Y1 (en) * | 2008-04-03 | 2010-08-10 | 진영매 | A fan with writing instrument |
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