Microwave mixing circuit and a down converter comprising it

Details Microwave mixing circuit and a down converter comprising it Microwave mixing circuit and a down converter comprising it

1995-08-29

1998-05-19

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455313, 455323, 455325, 455330, 333104, 333116, H04B 126

Patent

active

057549516

ABSTRACT:
A microwave mixing circuit of a small size for selecting a signal to be received out of plural microwave signal inputs, and converting it to an intermediate frequency signal, and a down converter comprising it are provided. A microwave input signal within a band of 12 GHz applied to one microwave signal input unit is guided through a bias terminal from a comparator into a mixer diode to which a bias current is supplied, and is converted in frequency by the mixer diode. A microwave input signal applied to other microwave signal input unit is guided through the bias terminal from the comparator into a mixer diode to which bias current is not supplied, and is hence not converted in frequency by the mixer diode. As a result, only an intermediate frequency signal of 1 GHz band corresponding to the former microwave signal appears at the intermediate frequency signal output terminal.

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European Search Report dated Feb. 24, 1992.

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