A 6–18 GHz GaAs Multifunction Transmitter and Receiver Chipset

Abstract

This paper presents a 6–18 GHz highly compact multifunction core chip using a 0.15 μm GaAs process. The Core multifunction chip includes a 6-bit digital phase shifter for beam steering, a 6-bit digital attenuator for amplitude correction, low-noise amplifiers (LNA) for amplitude compensation, and single-pole double-throws (SPDT) T/R switch Used to implement feature selection. Fabrication results show that the MMIC exhibits a transmit gain of 1 to 3.7 dB and a receive gain of -3 to 2 dB in the 6 to 18 GHz range. The transmission path root mean square (RMS) gain and phase error are better than 0.6 dB and 7.3°, respectively.