HFE0503_LeongHigh Frequency Design BROADBAND DESIGN From May 2003 High Frequency Electronics Copyright 2003 Summit Technical Media, LLC Broadband VHF/UHF Amplifier Design Using Coaxial Transformers By C. G. Gentzler and S.K. Leong Polyfet RF Devices he desire of the armed forces to maintain instant communications with all forces requires the design of miniature broadband power amplifiers with greater than decade bandwidth (30 to 512 MHz). This bandwidth is required for all-band transceivers that cover tactical ground and air frequencies in addition to civil telecommunication frequencies and the frequencies of our allies. All-band radios are commonplace in virtually every deployment of new platforms, as well as in the retrofitting of existing communications systems. This paper will discuss the desig……