Inspec keywords: Ge-Si alloys; gas sensors; BiCMOS integrated circuits; low noise amplifiers; phase locked loops; semiconductor materials; radio receivers; oscillators; millimetre wave mixers; lenses; radio transmitters; circuit tuning

Other keywords: gas spectroscopy; SiGe technology; tunable transmitter; SiGe; active subharmonic mixer; external dielectric lenses; tunable receiver; BiCMOS; differential hybrid subharmonic mixer; acetonitrile; size 0.6 m; differential low-noise amplifier; constant frequency offset; methanol; gas absorption cell; external phase-locked loops; frequency 245 GHz to 122 GHz; integrated local oscillators

Subjects: Chemical sensors; Radio links and equipment; Modulators, demodulators, discriminators and mixers; Chemical sensors; Oscillators; Mixed technology integrated circuits; Microwave integrated circuits; Amplifiers