Ultra-compact integrated circuits for Ku-band wireless communication system (無線通信システム)

概要

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In this work, an ultra-compact wireless receiver chip set employing heterojunction bipolar transistor (HBT) were developed for application to Ku-band wireless communication system. The receiver of monolithic microwave integrated circuit (MMIC) includes mixer, filter, amplifier and input/output matching circuit. Especially, spiral inductor structures employing SiN film were used for a suppression of LO and its second harmonic leakage signals. The ultra-compact active 90° power divider employing InGaP/GaAs HBT was developed for highly integrated on-chip MMIC, and it used a novel composite structure employing common-emitter (CE) and common-collector (CC) circuits for 90° power splitting. The ultra-compact MMIC receiver system showed a highly suppressed LO leakage power of-35 dBm and second harmonic LO leakage power of -53 dBm without external filters. And the size of ultra-compact active 90° power divider was about 3 1.6% of conventional passive branch-line coupler. The ultra-compact active 90° power divider showed good RF performance comparable to passive divider at Ku-band.
社団法人電子情報通信学会の論文
2010-01-14