JPH01110505U - - Google Patents
Info
- Publication number
- JPH01110505U JPH01110505U JP14995187U JP14995187U JPH01110505U JP H01110505 U JPH01110505 U JP H01110505U JP 14995187 U JP14995187 U JP 14995187U JP 14995187 U JP14995187 U JP 14995187U JP H01110505 U JPH01110505 U JP H01110505U
- Authority
- JP
- Japan
- Prior art keywords
- antenna element
- storage tube
- extended
- antenna
- characteristic impedance
- 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
- 238000010586 diagram Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
Landscapes
- Details Of Aerials (AREA)
Description
第１図は本考案の一実施例のホイツプアンテナ
２１の伸長時の断面図、第２図はホイツプアンテ
ナ２１の縮小時の分解斜視図、第３図は第１図の
切断面線―から見た断面図、第４図は先行技
術のホイツプアンテナ１の伸長時の断面図、第５
図はホイツプアンテナ１，２１が周波数変調放送
の受信に用いられるときの等価回路図、第６図は
ホイツプアンテナ１，２１が振幅変調放送の受信
に用いられるときの等価回路図である。
２１…ホイツプアンテナ、２２…車体、２３…
アンテナエレメント、２４，２５…導体、２６…
収納筒、２７…内筒、２８…外筒、３０…接触片
、３１…同軸ケーブル、４１…取付孔。
FIG. 1 is a cross-sectional view of the whip antenna 21 according to an embodiment of the present invention when it is extended, FIG. 2 is an exploded perspective view of the whip antenna 21 when it is contracted, and FIG. 3 is a cross-section taken along the cutting plane line - in FIG. 4 is a sectional view of the whip antenna 1 of the prior art when it is extended, and FIG.
The figure is an equivalent circuit diagram when the whip antennas 1 and 21 are used for receiving frequency modulated broadcasting, and FIG. 6 is an equivalent circuit diagram when the whip antennas 1 and 21 are used for receiving amplitude modulated broadcasting. 21... Whip antenna, 22... Vehicle body, 23...
Antenna element, 24, 25...conductor, 26...
Storage tube, 27... Inner tube, 28... Outer tube, 30... Contact piece, 31... Coaxial cable, 41... Mounting hole.
Claims (1)
、 前記収納筒内で、収納筒と電気的に絶縁されて
、収納筒から上方へ望遠鏡状に伸縮可能であるア
ンテナエレメントと、 前記アンテナエレメントが収納筒から上方に引
出されて伸長された状態で、該アンテナエレメン
トの下端部と電気的に接続されるケーブルとを含
む車載用アンテナにおいて、 アンテナエレメントの下端部を、該アンテナエ
レメントの伸長時における収納筒内にある部分の
外径を小さく形成して、このアンテナエレメント
の下端部の特性インピーダンスを、アンテナエレ
メントおよびケーブルの特性インピーダンスにほ
ぼ等しくすることを特徴とする車載用アンテナ。[Scope of Claim for Utility Model Registration] A storage tube that is connected and fixed to the body of an automobile, and that is electrically insulated from the storage tube and can be expanded and contracted upward from the storage tube in a telescopic shape. An on-vehicle antenna comprising an antenna element, and a cable electrically connected to a lower end of the antenna element when the antenna element is pulled upward from a storage tube and extended, the lower end of the antenna element being extended. , characterized in that the outer diameter of the portion of the antenna element that is located inside the housing tube when it is extended is made small so that the characteristic impedance of the lower end of the antenna element is approximately equal to the characteristic impedance of the antenna element and the cable. Car antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14995187U JPH0546329Y2 (en) | 1987-09-30 | 1987-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14995187U JPH0546329Y2 (en) | 1987-09-30 | 1987-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01110505U true JPH01110505U (en) | 1989-07-26 |
| JPH0546329Y2 JPH0546329Y2 (en) | 1993-12-03 |
Family
ID=31422648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14995187U Expired - Lifetime JPH0546329Y2 (en) | 1987-09-30 | 1987-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0546329Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009260826A (en) * | 2008-04-18 | 2009-11-05 | Yagi Antenna Co Ltd | Whip antenna |
-
1987
- 1987-09-30 JP JP14995187U patent/JPH0546329Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009260826A (en) * | 2008-04-18 | 2009-11-05 | Yagi Antenna Co Ltd | Whip antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0546329Y2 (en) | 1993-12-03 |
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