Title :
A planar 94-GHz transceiver with switchable polarization
Author :
Niehenke, E.C. ; Stenger, P. ; McCormick, T. ; Schwerdt, C.
Author_Institution :
Electron. Syst. Group, Westinghouse Electric Corp., Baltimore, MD, USA
Abstract :
The design and performance of a low-cost, planar microstrip 94-GHz transceiver is described. It includes a two-axis, monopulse-fed, four-element, switchable, right-hand-left-hand circularly polarized patch antenna. All circuits are monolithic microwave integrated circuits (mixer, intermediate-frequency amplifier, and RF PIN diode switch) interconnected with low-loss, Z-cut quartz microstrip. The miniature 1.1-in-diameter by 0.25-in-thick transceiver operated both in the transmit and in the receive mode with a 3-dB beamwidth of 58 degrees . When mounted as a feed for a 5-in-diameter parabolic dish, the assembly exhibited a 1.7 degrees 3-dB beamwidth, 12-dB sidelobes, a gain of 26 dB, and a difference pattern null of 30 dB.<>
Keywords :
MMIC; microstrip antennas; microwave amplifiers; mixers (circuits); transceivers; 26 dB; 3-dB beamwidth; 94 GHz; RF PIN diode switch; circularly polarized patch antenna; difference pattern null; intermediate-frequency amplifier; mixer; monolithic microwave integrated circuits; parabolic dish; planar microstrip; quartz microstrip; receive mode; sidelobes; switchable polarization; transceiver; MMICs; Microstrip; Microwave amplifiers; Microwave integrated circuits; Monolithic integrated circuits; Patch antennas; Polarization; Radiofrequency integrated circuits; Switches; Transceivers;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276918
