Cascode-delay-matched distributed amplifiers for efficient broadband microwave power amplification

Abstract

We present a broadband distributed power amplifier topology capable of providing efficiencies approaching 50%. Unlike tapered-drain-line power TWAs, high-Z/sub 0/ lines are not required, greatly improving realizability in MMIC implementation. An experimental hybrid achieved bandwidth 25% of f/sub /spl tau// with /spl sim/15 dB gain and 30/spl plusmn/5% power-added-efficiency.