High‐efficiency tapered distributed power amplifier with 2‐μm GaAs HBT process

Abstract

deviates somewhat from the ideal values. The latter is due to the step discontinuity effect of shunt stubs at the higher frequencies. Notice that the ratio of center frequency of upper stopband to central frequency of lower stopband is 4, which is equal to the value obtained from (4) when X N ¼ 0.4 p. CONCLUSIONSExplicit formulations regarding bandwidth, central frequency, and ratio of the next higher-order harmonic frequency to the fundamental frequency of a bandstop filter were presented. A high-order bandstop filter implemented with hybrid embedded line, spurline, and conventional microstrip was built and measured to illustrate the validity of the design method.

A systematic design of 1.5-9 GHz high power-high efficiency two-stage GaAs PHEMT power amplifier

“…Design of a wideband power amplifier is often a critical phase of any RF/microwave communication system realization. There are a huge number of solid‐state wideband power amplifier applications where the fractional bandwidths are in the range of 50–200%: Microwave electronic warfare applications , high‐resolution short range radar and systems , software defined radios , phase array radars , and digital optical communication systems are some of the widely used application examples.…”