We study possibilities of implementing flexible and programmable components for the RF front-ends of wideband multi-functional phased arrays using GaAs MMIC and RF MEMS technologies. The use of MEMS reconfigurable matching networks in tunable bandpass LNAs is proposed to achieve wider tuning ranges (e.g. 6.5-9.9GHz is obtained according to simulations) and adequate performance of such LNAs. We further demonstrate the potential for monolithic integration with active devices by showing how variable MEMS capacitors may be realized in a GaAs foundry process.

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In this paper, we present a very broadband array antenna element (7.5-17 GHz) consisting of aperture coupled stacked microstrip antenna elements. Theoretical results for an infinite array, as well as theoretical and experimental results for a 2-element waveguide simulator are presented. The agreement between the theoretical and the experimental results for the waveguide simulator is good. The obtained results indicate the possibility of achieving bandwidths exceeding an octave, while maintaining widescan capabilities, for large arrays of microstrip antenna elements.

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