A Ku-band MMIC Transversal Band-Pass Active Filter

Abstract

Monolithic transversal and recursive microwave active filters overcome the, drawback of heavy resonant elements and lack of operational amplifiers in high frequencies domain. We present a GaAs transversal MMIC filter centred at 11.7 GHz. The experimental results show great possibilities for future-agile pre-filtering modules in new generations of telecommunications receivers. The GaAs MMIC transversal active filter presented in this paper combinies pseudo-elliptic filters performances with a polynomial structure. The fundamental points of our work are: - easy-to-time effective synthesis technique with a new dedicated program for circuit calculations - stability of the circuit ensured by a simple construction and a good reproducibility - original idea of using lumped elements in telecommunications frequencies domain which allows a direct application of the theory - demonstration of the agile nature of these filters.