Automobile antenna
US4160977A · kind A · utility
Inventor
Key dates
| Filing date | Feb 23, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Feb 23, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1271
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
By forcing the resonance in the medium-wave spectrum of the electromagnetic loop antenna or antennas formed by a shunting conductor in combination with a series connected capacitor shunting a window opening in an automobile body and coupling to an output conductor through the distributed capacitance and mutual inductance provided by close physical proximity between such output conductor and such shunting conductor, such output conductor terminating at one end in at least one antenna element having electrostatic antenna characteristics, an output signal from the antenna is obtained which exhibits the electrostatic-noise rejection characteristics of a loop antenna and the omni-directional characteristics of a vertical whip-type antenna, while, at the same time, the impedance of the system is compatible with standard radio-tuner input circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.