Glass mounted antenna for car radio

Claim 1

A glass mounted antenna for a car radio comprising: a first resonant circuit comprising a capacitor in a coil provided on one side of said glass, said first resonant circuit being resonant at an FM broadcast frequency band; a first ring-formed capacitor electrode provided on said one side of said window glass; an antenna means electrically coupled to said first resonant circuit and said first ring-formed capacitor electrode; a second resonant circuit comprising a capacitor and a coil provided on another side of said glass opposing said first resonant circuit, said second resonant circuit being resonant at said FM broadcast frequency band; a second ring-formed capacitor electrode provided on said another side of said glass opposing said first ring-formed capacitor element; a band-pass filter means for passing signals in said FM broadcast frequency band coupled to said second resonant circuit; and an AM impedance converter means for converting a high impedance at an AM broadcast frequency band to a low impedance at said AM broadcast frequency band coupled to said second ring-formed capacitor electrode; whereby signals in said FM broadcast frequency band are passed through said glass by said first and second resonant circuits and to a receiver of said car radio by said band-pass filter and signals at said AM broadcast frequency band are passed through said glass by said first and second ring-formed capacitor electrodes and through said AM impedance converter means to said receiver of said car radio.