Radial cavity-fed spatial power combiner with retrodirective array behavior

This paper discusses the design and operational properties of a circular array of slot coupled active GaAs metal-semiconductor field-effect transistor (MESFET) rectangular microstrip patch antennas arranged for quasioptical power combining at X band. The active antenna radiating elements are injecti...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2004-05, Vol.52 (5), p.1281-1285
Main Authors: Subbarao, B., Fusco, V.F.
Format: Article
Language:English
Subjects:
Antennas
Arrays
Conversion
Couplings
FETs
Gallium arsenide
Holes
MESFETs
Microstrip antenna arrays
Microstrip antennas
Patch antennas
Power combiners
Radio frequencies
Radio frequency
Slot antennas
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Summary:This paper discusses the design and operational properties of a circular array of slot coupled active GaAs metal-semiconductor field-effect transistor (MESFET) rectangular microstrip patch antennas arranged for quasioptical power combining at X band. The active antenna radiating elements are injection locked by slot coupling to a radial cavity waveguide. Spatial power combining efficiency of 75% and dc to radio frequency (RF) conversion efficiency of 10% at 28 dBm EIRP was achieved at 10.38 GHz. Retrodirective action was also demonstrated by using the active elements as self-oscillating mixers pumped at 20.76 GHz.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2004.827492