Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1996-08-21
1998-08-11
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455327, 455318, H04B 128
Patent
active
057941335
ABSTRACT:
A switchable microwave signal mixing circuit is disclosed which comprises: an osc 3 for generating an osc signal; 1st and 2nd microstrip lines 6, 7, coupled to the oscillator, for receiving 1st and 2nd microwave signals and the osc signal respectively; a bias voltage control circuit 54 for alternatively generating 1st and 2nd control bias voltages; 1st and 2nd FETs 8, 9, having 1st and 2nd gates supplied with the 1st and 2nd control bias voltages and coupled to the 1st and 2nd microstrip lines, drains supplied with bias voltages, and sources respectively, for alternatively generating 1st and 2nd IF signals from the 1st and 2nd microwave signals and the osc signal from the 1st and 2nd microstrip lines according to the control bias voltages; and an IF signal outputting circuit 14-18, 21 for outputting one of the IF signals selectively generated. In addition, a Wilkinson's divider 14-16 may be provided between the 1st and 2nd FETs and the outputting circuit for providing an isolation between the 1st and 2nd FETs. In addition, 1st and 2nd probing circuits 24, 25 coupled to the 1st and 2nd microstrip lines, for converting the 1st and 2nd microwaves into the 1st and 2nd microwave signals including 1st and 2nd TEM waves may be provided.
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Banks-Harold Marsha D.
Eisenzopf Reinhard J.
Matsushita Electric - Industrial Co., Ltd.
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