The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 1995
Filed:
Sep. 17, 1993
Richard D Zerod, Livonia, MI (US);
George F Tannery, IV, Ypsilanti, MI (US);
Mohamman-Reza S Movahhed, Ann Arbor, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A concealed antenna system for motor vehicle radios replaces a radio chassis preamplifier with a remote radio frequency amplifier packaged with a filter module adjacent the antenna conductors to reduce the noise floor before transmitting the signal by a highly capacitive cable to the radio chassis. The dynamic range of the antenna system is improved by an automatic gain control feedback signal from the radio chassis to the RF amplifier so that the gain of the amplifier is reduced in the presence of a strong AM signal. Preferably the antenna conductors comprise embedded conductors in an insulating panel of a motor vehicle such as the vehicle rear window, and the AM conductor may be conveniently provided by the heater grid for the window panel.