JPS6361513A - Antenna for automobile - Google Patents
Antenna for automobileInfo
- Publication number
- JPS6361513A JPS6361513A JP20551686A JP20551686A JPS6361513A JP S6361513 A JPS6361513 A JP S6361513A JP 20551686 A JP20551686 A JP 20551686A JP 20551686 A JP20551686 A JP 20551686A JP S6361513 A JPS6361513 A JP S6361513A
- Authority
- JP
- Japan
- Prior art keywords
- frequency band
- tuning
- antenna
- amplifier
- signal processing
- 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
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
Landscapes
- Details Of Aerials (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、自動車用アンテナに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an automotive antenna.
［従来の技術］
従来の自動車用アンテナは、トランクリッド等に設けら
れ、そのアンテナから車内の受信機まで、フィーダを介
して高周波信号が伝送される。[Prior Art] A conventional automobile antenna is installed on a trunk lid or the like, and a high-frequency signal is transmitted from the antenna to a receiver inside the vehicle via a feeder.
この場合、Ｃ分割効果によってＬＯｄＢ程度の損失が発
生するので、この損失を補うために、アンテナマストに
ブースタアンプを設けている。このブースタアンプは、
広帯域のアンプである。In this case, a loss on the order of LO dB occurs due to the C-splitting effect, so a booster amplifier is provided in the antenna mast to compensate for this loss. This booster amplifier is
It is a wideband amplifier.
しかし、目的局からの信号レベルが低く、妨害局からの
信号レベルが高い場合、上記従来装置のように広帯域ア
ンプを使用すると、いわゆる混変調歪が発生するという
問題がある。However, when the signal level from the target station is low and the signal level from the interfering station is high, there is a problem in that so-called cross-modulation distortion occurs when a wideband amplifier is used as in the conventional device described above.
［発明の目的］
本発明は、上記従来装置の問題点に着目してなされたも
ので、自動車用アンテナから受信機までの間における損
失を充分に補うと同時に実効受信感度を高め、混変調歪
が発生しない自動車用アンテナを提供することを目的と
するものである。[Object of the Invention] The present invention has been made by focusing on the problems of the conventional device described above, and at the same time sufficiently compensates for the loss between the automobile antenna and the receiver, increases the effective reception sensitivity, and reduces cross-modulation distortion. The object of the present invention is to provide an automotive antenna that does not generate.
［発明の実施例］ 第１図は、本発明の一実施例の説明図である。[Embodiments of the invention] FIG. 1 is an explanatory diagram of an embodiment of the present invention.
高周波信号処理部２０は、所定周波数帯域のみを増幅す
るとともに、その増幅された信号を検波する回路であり
、アンテナマスト１０に取付けられている、また、高周
波信号処理部２０は、受信機本体３０から受けたトラッ
キング信号に基づいて、増幅すべき周波数帯域を調整す
るものである。なお、上記アンテナは、ロッドアンテナ
またはスポイラ−アンテナである。The high frequency signal processing section 20 is a circuit that amplifies only a predetermined frequency band and detects the amplified signal, and is attached to the antenna mast 10. The frequency band to be amplified is adjusted based on the tracking signal received from the Note that the above antenna is a rod antenna or a spoiler antenna.
第２図は、上記実施例をより具体的に示す回路図である
。FIG. 2 is a circuit diagram showing the above embodiment in more detail.
高周波信号処理部２０は、機部的には、同３１ｙ！ｌ！
アンプ２１と中間周波増幅器２２と検波回路２３とを有
する。同調型アンプ２１は、バラクタダイオードの容量
変化によって同調周波数帯域が変化し、電子チューナの
一部を構成するものである。The high frequency signal processing section 20 is mechanically 31y! l!
It has an amplifier 21, an intermediate frequency amplifier 22, and a detection circuit 23. The tuned amplifier 21 has a tuning frequency band that changes due to a change in the capacitance of a varactor diode, and constitutes a part of an electronic tuner.
また、同調型アンプ２１は、その同調周波数帯域内の信
号を選択的に増幅するものである。Further, the tunable amplifier 21 selectively amplifies signals within its tunable frequency band.
受信機本体３０は、選局手段３１と、低周波増幅回路３
２とを有する１選局手段３１は、ＤＣ電圧を調整して出
力するものであり、その出力電圧は、トラッキング信号
として高周波信号処理部２０の同調型アンプ２１に送ら
れる。そして、上記出力電圧に応じて、同調周波数が決
定される。The receiver main body 30 includes a channel selection means 31 and a low frequency amplification circuit 3.
The 1-channel selection means 31 having 2 and 2 adjusts and outputs a DC voltage, and the output voltage is sent to the tunable amplifier 21 of the high-frequency signal processing section 20 as a tracking signal. Then, a tuning frequency is determined according to the output voltage.
したがって、選局手段３１と同調型アンプ２１とによっ
て、電子チューナが構成される。Therefore, the tuning means 31 and the tunable amplifier 21 constitute an electronic tuner.
また、検波回路２３からの信号が中間周波増幅器２２等
に送られ、自動利得制御が行なわれるようになっている
。Further, the signal from the detection circuit 23 is sent to the intermediate frequency amplifier 22, etc., and automatic gain control is performed.
中間周波増幅器２２．検波回路２３、低周波増幅器３２
は一般的なものであり、スピーカ４０は低周波増幅回路
３２によって駆動される。Intermediate frequency amplifier 22. Detection circuit 23, low frequency amplifier 32
is a general one, and the speaker 40 is driven by the low frequency amplification circuit 32.
次に、上記実施例の動作について説明する。Next, the operation of the above embodiment will be explained.
まず、電源をオンし、選局手段３１に設けられているダ
イヤルを回すと、そのダイヤルの位置に応じたＤＣ電圧
を選局手段３１が出力する。このＤＣ電圧に応じて、同
調型アンプ２１の同調回路部分が所定周波数帯域に同調
する。First, when the power is turned on and a dial provided in the tuning means 31 is turned, the tuning means 31 outputs a DC voltage according to the position of the dial. According to this DC voltage, the tuning circuit portion of the tunable amplifier 21 is tuned to a predetermined frequency band.
この同調した周波数帯域は、従来のブースタアンプより
も周波数帯域が狭いので、混変調が生じ難い、したがっ
て、目的局の受信レベルが低く妨害局の受信レベルが高
くても、混変調歪が少ない、また、同調アンプ２０内で
高周波増幅しているので、アンテナ１０と受信機本体３
０との間で生じる損失を充分に補うことができる。This tuned frequency band is narrower than that of conventional booster amplifiers, so cross-modulation is less likely to occur. Therefore, even if the reception level of the target station is low and the reception level of the interfering station is high, there is little cross-modulation distortion. Also, since the high frequency is amplified within the tuned amplifier 20, the antenna 10 and the receiver main body 3
0 can be sufficiently compensated for.
さらに、高周波信号処理部２０が出力する信号は、低周
波であるので、その高周波信号処理部２０から受信機本
体３０までの間における損失、ノイズの混入が非常に少
ない。したがって、アンテナ１０と受信機本体３０との
間における損失、ノイズの混入が非常に少ない。Furthermore, since the signal outputted by the high frequency signal processing section 20 is of low frequency, there is very little loss or noise mixing between the high frequency signal processing section 20 and the receiver main body 30. Therefore, loss and noise mixing between the antenna 10 and the receiver main body 30 are extremely small.
［発明の効果］
本発明によれば、自動車用アンテナから受信機本体まで
の間における損失を充分に補うと同時に実効受信感度を
高め、混変調歪が発生しないという効果を有する。[Effects of the Invention] According to the present invention, it is possible to sufficiently compensate for the loss between the automobile antenna and the receiver body, increase the effective receiving sensitivity, and prevent cross-modulation distortion from occurring.
第１図は、本発明の一実施例の説明図である。 第２図は、上記実施例を示すブロック図である。 １０・・・アンテナマスト、 ２０・・・高周波信号処理部、 ３０・・・受信機本体。 FIG. 1 is an explanatory diagram of an embodiment of the present invention. FIG. 2 is a block diagram showing the above embodiment. 10... antenna mast, 20...high frequency signal processing section, 30...Receiver body.
Claims (1)
出力信号を検波する高周波信号処理部が自動車用アンテ
ナマストに取付けられ、受信機本体からのトラッキング
信号に基づいて、前記高周波信号処理部における同調周
波数帯域を調整することを特徴とする自動車用アンテナ
。A high-frequency signal processing unit that tunes and amplifies only a predetermined frequency band and detects its output signal is attached to the automobile antenna mast, and the tuning frequency of the high-frequency signal processing unit is determined based on the tracking signal from the receiver body. An automotive antenna characterized by band adjustment.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20551686A JPS6361513A (en) | 1986-09-01 | 1986-09-01 | Antenna for automobile |
| US07/087,436 US4910796A (en) | 1986-09-01 | 1987-08-19 | Automobile antenna |
| AU77448/87A AU578185B2 (en) | 1986-09-01 | 1987-08-26 | Car radio receiver |
| EP87112457A EP0258821B1 (en) | 1986-09-01 | 1987-08-27 | Automobile antenna apparatus |
| DE3750108T DE3750108T2 (en) | 1986-09-01 | 1987-08-27 | Motor vehicle antenna device. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20551686A JPS6361513A (en) | 1986-09-01 | 1986-09-01 | Antenna for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6361513A true JPS6361513A (en) | 1988-03-17 |
Family
ID=16508165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20551686A Pending JPS6361513A (en) | 1986-09-01 | 1986-09-01 | Antenna for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6361513A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151127A (en) * | 1982-03-04 | 1983-09-08 | Nippon Denso Co Ltd | Car radio receiver |
-
1986
- 1986-09-01 JP JP20551686A patent/JPS6361513A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151127A (en) * | 1982-03-04 | 1983-09-08 | Nippon Denso Co Ltd | Car radio receiver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2577490B2 (en) | AGC circuit of FM front end | |
| US5722060A (en) | Radio receiver | |
| US5170489A (en) | Noise blanker with continuous wave interference compensation | |
| US4872206A (en) | Mixer dynamic control | |
| US5990746A (en) | Amplifier system | |
| US6812789B2 (en) | RF power amplifier digital gain flattening over multiband frequencies | |
| US4910796A (en) | Automobile antenna | |
| US4357712A (en) | Radio receiver | |
| GB2317517A (en) | Improving the linearity of a receiver amplifier by controlling the reactance of a circuit connected to the emitter or source of a transistor | |
| JPS6361513A (en) | Antenna for automobile | |
| JP2019184339A (en) | Radar receiver | |
| US7171180B2 (en) | AM receiver circuit performing sound quality compensation of AM detection output signal | |
| JPS6361512A (en) | Antenna for automobile | |
| US5523801A (en) | Upper and lower adjacent picture signal traps | |
| JPS63136834A (en) | Antenna for automobile | |
| JPS6361514A (en) | Antenna for automobile | |
| JP3135789B2 (en) | Automatic gain control loop circuit | |
| JP2002198747A (en) | High frequency amplifier circuit and antenna amplifier | |
| JPH0746988Y2 (en) | AGC control circuit of FM receiver | |
| JPS631465Y2 (en) | ||
| JPH09326718A (en) | On-vehicle radio receiver | |
| KR920007472B1 (en) | Apparatus for eliminating spurious signals of super regenerative receiver | |
| KR960004723Y1 (en) | Tuning apparatus of tv receiver & vcr | |
| JPH0227641Y2 (en) | ||
| JPS57180216A (en) | Agc circuit for television receiver |