Radio communication equipment

Details Radio communication equipment Radio communication equipment

1996-06-14

1998-08-18

Crosland, Donnie L.

Telecommunications

Transmitter and receiver at same station

455 82, 455 90, 455 97, 343751, 343893, H04B 138, H01Q 900

Patent

active

057970840

ABSTRACT:
A small radio communication unit which requires no antenna adjustment is provided by using small chip antennas whose gain is not degraded and which have a wide bandwidth. The inventive radio communication unit comprises a first chip antenna contained within the unit and having a first frequency characteristic; a first filter connected to the first antenna and having a pass bandwidth for passing a received signal; a receiving circuit connected to an output end of the first antenna; a receiving PLL circuit for outputting a local oscillation signal; a second chip antenna contained within the unit and having a second frequency characteristic; a second filter connected to the second antenna and having a pass bandwidth for passing a transmitted signal; a transmitting circuit connected to an input end of the second filter and comprising a transmitting carrier oscillation and modulating circuit, a transmission amplifier circuit and an isolator; a control circuit for controlling operations of the receiving circuit and the transmitting circuit; and a modulating signal input terminal to which a modulating signal is applied.

REFERENCES:
patent: 5351023 (1994-09-01), Niiranen
patent: 5420596 (1995-05-01), Burrell et al.
patent: 5453752 (1995-09-01), Wang et al.
patent: 5483678 (1996-01-01), Abe
patent: 5554960 (1996-09-01), Ohnuki et al.

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