Title :
45-GHz MMIC power combining using a circuit-fed, spatially combined array
Author :
Delisle, John T. ; Gouker, Mark A. ; Duffy, Sean M.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
fDate :
1/1/1997 12:00:00 AM
Abstract :
We describe the design and measurement of a hybrid-circuit, tile-approach subarray for use in spatial power-combined transmitters. The subarray consists of 16 monolithic millimeter-wave integrated circuit (MMIC) amplifiers, each feeding a circularly polarized cavity-backed microstrip antenna. The average performance across the 43.5-45.5 GHz band is as follows: EIRP 18.3 dBW, DC-RF efficiency 10.3%, effective transmitter power 530 mW, system gain 13.2 dB, and combining efficiency of 46.2%. The minimum axial ratio is 1.2 dB at 43.9 GHz, and the array has a 3% 3-dB axial ratio bandwidth
Keywords :
MIMIC; antenna radiation patterns; electromagnetic wave polarisation; microstrip antenna arrays; millimetre wave amplifiers; millimetre wave antenna arrays; millimetre wave devices; radio transmitters; 10.3 percent; 13.2 dB; 43.5 to 45.5 GHz; 46.2 percent; 530 mW; EHF; MIMIC power combining; cavity-backed microstrip antenna; circuit-fed spatially combined array; circularly polarized antenna; hybrid-circuit tile-approach subarray; monolithic millimeter-wave integrated circuit; spatial power-combined transmitters; Antenna feeds; Antenna measurements; Integrated circuit measurements; MMICs; Microstrip antenna arrays; Microstrip antennas; Millimeter wave integrated circuits; Performance gain; Polarization; Transmitters;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
