2.4 V-operated enhancement-mode power PHEMTs for personal handy-phone system application

Abstract

Enhacement-mode pseudomorphic high electron mobility transistors (E-PHEMTs) were developed for low voltage wireless communication applications. Under drain bias of 3.6 V, the device delivered a high output power density of 265.25 mW/mm (29.5dBm) with a power-added-efficiency (PAE) of 50.54 %. Under 1.9GHz pi/4-shifted quadrature phase shift keying(QPSK) modulation signal, the 3.36 mm devices meet personal handy-phone system (PHS) specification at an output power level of 22.42 dB with PAE of 35.12% under 2.4 V drain bias. The E-PHEMTs developed are adequate for low-voltage-operated PHS application.