Design and implementation of a 10 W broadband power amplifier at the broadcast systems

Abstract

This paper deals with the design of a 10W amplifier using a DMOSFET type push-pull transistor, where the circuit was designed by applying the optimization technique in finding the appropriate input and output impedance to obtain a 40 dBm output power and a good efficiency (33.9%) suitable for working in the broadcast systems, in addition to the appropriate design of the matching circuit using a transformer BALUN with ferrite, which provided wide performance up to several octaves from 100 MHz to 700 MHz and gain (12.5dB) within ±0.5dB, and VSWR<1.8. the design was simulated by(NIAWR) software, then the circuit was implemented and practical measurements were made. We have good convergence between the theoretical and practical results, thus the design and implementation is simple and less expensive compared to GaN HEMT type power amplifiers