45-GHz MMIC power combining using a circuit-fed, spatially combined array

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 av...

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Bibliographic Details
Published in:IEEE microwave and guided wave letters 1997-01, Vol.7 (1), p.15-17
Main Authors: Delisle, J.T., Gouker, M.A., Duffy, S.M.
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna measurements
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated circuit measurements
Microstrip antenna arrays
Microstrip antennas
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Millimeter wave integrated circuits
MMICs
Performance gain
Polarization
Transmitters
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Summary: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.
ISSN:1051-8207
1558-2329
DOI:10.1109/75.553706