Multi-Spurline based Bandstop Filter Design for Fixed Wireless Communication System

A multi-spurline bandstop filter designed based on Teflon substrate to have a high-performance bandstop filter for fixed wireless system operation. The multi-spurlines are arranged symmetrically and simulated by using Sonnet Lite electromagnetic simulation tools. It achieved the insertion loss (S21) of 43.6 dB and return loss of 0.034 dB at 7.0 GHz. The wide fractional bandwidth of this designed bandstop filter was 4 GHz. It is compact and can be easily handled. The total designed layout of the purposed bandstop filter is 8.3 x 5 mm2.