Patent ID: 6215450
Filing Date: 2001-04-10
Classification: H01Q

Abstract:
A glass window antenna system for motor vehicles comprising:a plurality of defogging heater wires provided at a center area of a rear window,one AM/FM antenna pattern provided on the rear window for mainly receiving an FM band while maintaining an AM receiving characteristic,one or more AM antenna patterns provided on the rear window for receiving an AM band, andone or more low-pass filters through which a first AM voltage received by the AM antenna patterns is superimposed on a second AM voltage received by the AM/FM antenna pattern to synthesize the first and second received AM voltages,wherein the total occupied area of the AM/FM antenna pattern and the AM antenna patterns is at least 0.2 m.sup.2, andwherein one antenna element of the AM/FM antenna pattern and one wire element of the defogging heater wires are opposed to each other and separated by a distance of between 10-30 mm, and one antenna element of the AM antenna patterns and an other wire element of the defogging heater wires are opposed to each other and separated by a distance of between 10-30 mm.