A glass antenna system for an automobile comprises a T-shaped or pi-shaped dynamic impedance matching circuit. Another system comprises an integrated circuit consisting of T-shaped FM and AM matching circuits each connected to a common cable. The T-shaped or pi-shaped matching circuit comprises at least two varactor diodes each applied to a channel selection voltage to match the FM antenna impedance with that of the FM receiver including that of the transmission cable.
申请公布号
US5699071(A)
申请公布日期
1997.12.16
申请号
US19960656833
申请日期
1996.06.03
申请人
SUMITOMO CHEMICAL COMPANY, LIMITED;NIPPON SHEET GLASS CO., LTD.