3 band communication equipment

Details 3 band communication equipment 3 band communication equipment

1994-03-28

1996-07-30

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

343715, 343901, H01Q 110, H01Q 500

Patent

active

055416152

ABSTRACT:
A three band antenna unit for reception of radio waves in the AM and FM bands and for reception and transmission of radio waves in the UHF band as well as its connection with filters and a communication equipment are disclosed. The antenna unit includes an upper, first element for reception and transmission of a radio wave in the UHF band and a lower, second element for reception of radio waves in the FM band, both connected to a mobile telephone. An AM band signal from the first element is transmitted to the lower, second element through an AM band pass filter. A radio wave signal from the lower, second element is transmitted to an AM/FM tuner through an AM/FM band pass filter. AM band radio wave signal received by the upper, first element which is used for reception and transmission of a radio wave in the UHF band is synthesized with the AM band radio wave signal received by the lower, second element which is used for reception of radio wave in the FM band before it is transmitted to the AM/FM tuner, which therefore exhibits a high AM band reception sensitivity.

REFERENCES:
patent: 4675687 (1987-06-01), Elliott
patent: 4968991 (1990-11-01), Yamazaki
patent: 5072230 (1991-12-01), Taniyoshi et al.
patent: 5089829 (1992-02-01), Haruyama et al.
patent: 5164739 (1992-11-01), Koide et al.

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