Glass antenna system for vehicles

Details Glass antenna system for vehicles Glass antenna system for vehicles

1998-07-23

1999-12-07

Wong, Don

Communications: radio wave antennas

Antennas

With vehicle

343860, H01Q 132

Patent

active

059991356

ABSTRACT:
An antenna system for a vehicle is provided. The antenna comprises an antenna disposed on a window glass and having a feed point, a matching circuit connected to the feed point, and a coaxial cable connecting between the matching circuit and the radio receiver. The matching circuit includes a parallel circuit having a damping resistor, a first coil and a first capacitor. The matching circuit further includes a second coil and a second capacitor connected in series between an output side of the parallel circuit and a ground such that, assuming that MF1 is a lower limited frequency of medium-frequency (MF) broadcast waves and MF2 is an upper limited frequency of the MF broadcast waves, a receiving sensitivity of the antenna system has local maximum points which are present at a frequency F1 in the range from (MF1-170) to MF1 KHz and at a frequency f2 in the range from (MF2-230) to MF2 KHz, respectively, and a local minimum point which is present at a frequency f0 smaller than f1 and equal to or larger than 50 KHz.

REFERENCES:
patent: 5083134 (1992-01-01), Saitou et al.
patent: 5198825 (1993-03-01), Sakurai et al.
patent: 5239302 (1993-08-01), Maeda et al.
patent: 5654720 (1997-08-01), Saitou et al.

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