Implementation of Band Pass Filter for Satellite Communications Using CSRR Technique

Bandpass filters are used in satellite communication to separate the signal of interest from the surrounding noise. For satellite communication, the high selectivity is essential, so a proper design of bandpass filter plays a major role in satellite communications. A C-band bandpass filter with enhanced out-of-band rejection is presented in this study. It comprises of a complementary split ring resonator (CSRR) and microstrip filter. The filter responses are usually satisfactory microstrip filter. But, by including a CSRR, a better filter response can be attained. Complimentary Split Ring Resonators (CSRR) uses reconfiguration technology and provides good results in microstrip filter design. By progressively etching single CSSR, improvements in filter responses are realised. The filter selectivity level is improved when CSRRs are added to the ground plane, namely at the rear of transmission line 50 Ω. This proposed bandpass filter is designed using High-Frequency Structure Simulator (HFSS). The best filter is manufactured and measured as a prototype. The novel design method is supported by theory and experiment results.