Dual Function Mixer Circuit for Millimeter Wave Transceiver Applications

A monolithic mixer circuit capable of performing either a receiver or transmitter function has been fabricated. The mode of operation is determined by applying either forward bias or reverse bias to a pair of mixer diodes. The circuit integrates Schottky-barrier diodes, bias lines, Ta/sub 2/O/sub 5/...

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Bibliographic Details
Published inMicrowave and Millimeter-Wave Monolithic Circuits Vol. 85; no. 1; pp. 78 - 81
Main Authors Chu, A., Courtney, W.E., Mahoney, L.J., Manfra, M.J., Calawa, A.R.
Format Conference Proceeding
LanguageEnglish
Published MTT007 1985
Subjects
Capacitors
Coupling circuits
Insertion loss
Local oscillators
Microstrip filters
Millimeter wave circuits
Schottky diodes
Transceivers
Transmitters
Transmitting antennas
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Summary:A monolithic mixer circuit capable of performing either a receiver or transmitter function has been fabricated. The mode of operation is determined by applying either forward bias or reverse bias to a pair of mixer diodes. The circuit integrates Schottky-barrier diodes, bias lines, Ta/sub 2/O/sub 5/ blocking and by-pass capacitors, a radial line stub filter and a microstrip branch-line coupler. For the receiver function the unit exhibits a conversion loss of 6.5 +- 0.5 dB from 34 to 36 GHz. For the transmitter function the circuit directs the signal from the local oscillator port to the antenna port with an insertion loss of approximately 2 dB at 33.5 GHz over a bandwidth of 1 GHz.
DOI:10.1109/MCS.1985.1113644