Design and simulation of recursive RF filter by using HEMT technology

Abstract

An active recursive filter using HEMT technology is proposed in the following article. An ED02AH HEMT technology with advanced design system (ADS 2010) was used to design a test circuit. This kind of filter appeared feasible in simulations, and reasonably practically good performance was achieved. Gain and Q-value were capable to be tuned within a wide range. A center frequency was 4GHz for which S21=20.134dB, S11=-15dB and S22=-21.2dB. Simulations demonstrate a center frequency tuning range of 1.5GHz to 6GHz.