JPS57173231A - Radio receiver for vehicle - Google Patents
Radio receiver for vehicleInfo
- Publication number
- JPS57173231A JPS57173231A JP5705881A JP5705881A JPS57173231A JP S57173231 A JPS57173231 A JP S57173231A JP 5705881 A JP5705881 A JP 5705881A JP 5705881 A JP5705881 A JP 5705881A JP S57173231 A JPS57173231 A JP S57173231A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- motor
- length
- receiving antenna
- radio wave
- 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
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
- H01Q1/125—Means for positioning
- H01Q1/1257—Means for positioning using the received signal strength
Landscapes
- Details Of Aerials (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE:To suppress the detuning of a radio receiver for a vehicle, the generation of a beam noise, and the generation of distortion by varying the length of a receiving antenna according to the intensity of a received radio wave. CONSTITUTION:When a radio wave has enough intensity to be covered by normal AGC, turning on the power source of a radio receiver permits a motor controlling circuit 20 to drive a motor 19, and the length of a receiving antenna 10 is maximized. When a vehicle runs into an area where the received radio wave is intense, e.g., right under a transmitting antenna, the reception input increases and the output of an AGC circuit 18 connected to the output side of a detecting circuit 15 also increases to decrease the gains of a high frequency amplifying circuit 11 and an intermediate frequency amplifying circuit, but when an AGC voltage rises above a reference value, the motor controlling circuit 20 drives the motor 19 to shorten the length of the receiving antenna 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5705881A JPS57173231A (en) | 1981-04-17 | 1981-04-17 | Radio receiver for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5705881A JPS57173231A (en) | 1981-04-17 | 1981-04-17 | Radio receiver for vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57173231A true JPS57173231A (en) | 1982-10-25 |
Family
ID=13044836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5705881A Pending JPS57173231A (en) | 1981-04-17 | 1981-04-17 | Radio receiver for vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57173231A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63185204A (en) * | 1987-01-28 | 1988-07-30 | Alpine Electron Inc | Automatic adjusting device for length of antenna of radio receiver |
-
1981
- 1981-04-17 JP JP5705881A patent/JPS57173231A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63185204A (en) * | 1987-01-28 | 1988-07-30 | Alpine Electron Inc | Automatic adjusting device for length of antenna of radio receiver |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2015553A1 (en) | Radio transmitter capable of compensating for a frequency characteristic of an antenna and/or a coupling circuit | |
CA2053778A1 (en) | Output level control circuit for use in rf power amplifier | |
JPS5643809A (en) | Automatic gain controller | |
EP0316879A3 (en) | Radio with broad band automatic gain control circuit | |
CA2006943A1 (en) | Radio transceiver apparatus with booster | |
EP0397444A3 (en) | Circuitry for widening the effective range of a transmitter | |
GB2250403A (en) | Method of preventing suppresion of sensitivity of a receiver and method of preventing radio interference | |
CA2232252A1 (en) | Radio transmitting apparatus and gain control method for the same | |
EP0461269A4 (en) | High-frequency heating device | |
JPS6436128A (en) | Method for receiving fm broadcast in mobile body | |
JPS57173231A (en) | Radio receiver for vehicle | |
JPS57173210A (en) | Antenna receiving and inputting circuit | |
JPS5642437A (en) | Radio receiver | |
JPS54140442A (en) | Automatic sensitivity control circuit for receiver | |
JPS5797240A (en) | Radio equipment for simultaneous transmission and reception | |
JPS57188103A (en) | Antenna for radio receiver of automobile | |
JPS5669907A (en) | Linear amplifier | |
JPS6478035A (en) | Receiver | |
JPS57135532A (en) | Diversity receiver | |
JPS5614716A (en) | Automatic tuning receiver | |
JPS55161430A (en) | Radio communicating system | |
JPS54127612A (en) | Receiving device | |
FR2416190A1 (en) | Transport trolley control system - has transmitter and a receiver on each trolley with signal amplitude detector including three variable gain amplifier stages | |
JPS5530300A (en) | Gain control circuit | |
SU1136306A1 (en) | Device for automatic stabilization of power |