Design of a compact 10-40 GHz filter bank for various satellite communication (SATCOM) and 5G applications

This paper proposes the design of an ultra-wideband four-channel switched filter bank (SFB) operating in the frequency range of 10-40 GHz. First, a filter bank board consisting of four microstrip bandpass filters (BPFs) placed in parallel row is simulated, fabricated and tested for validity. The design of individual composite microstrip BPF is based on open/short stubs and spurlines using Ansoft HFSS ver. 22R1. A tuning range from 10 to 40 GHz with a fractional bandwidth of 120% is achieved with mid-band measured insertion loss ranging from 1.8 to 3 dB. Thereafter, the complete design of SFB with these four BPFs, two single-pole four-throw (SP4T) switch along with biasing control mechanism is proposed and designed using EDA tool Kicad ver. 6.0. An SFB with ultrawide bandwidth for SATCOM and 5G applications covering overall frequency range from 10 to 40 GHz is proposed for the first time.