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With the growth of wireless and lightwave technologies, heterostructure electronic devices are commodity items in the commercial marketplace [Browne J. Power-amplifier MMICs drive commercial circuits. Microwaves & RF, 1998. p. 116-24.]. In particular, HBTs are an attractive device for handset power amplifiers at 900 MHz and 1.9 GHz for CDMA applications [Lum E. GaAs technology rides the wireless...
Production and laboratory AlGaAs/GaAs HBT processes were developed, enabling implementation of high-precision and high-speed circuits to meet the ever increasing demands on information bandwidths. Under normal bias conditions, the production HBT process shows transistor f t and f max above 50 GHz, while the laboratory process reveals f t of 60 GHz and f max of 110 GHz...
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