access icon openaccess Design of coplanar waveguide band-pass filter for S-band application

Coplanar waveguide (CPW) has a huge demand for designing band-pass filter (BPF). In this study, the filter designed by open-ended CPW series stub which acts as a resonant circuit thus giving a band-pass response. As the number of open stub discontinuity is increased, the frequency response and roll-off rate of the proposed BPF has improved gradually. Electromagnetic simulated and measured results show a very good agreement with each other. The proposed filter is designed to obtain a frequency range of 1.97–4 GHz (S-band) having rising edge and falling edge selectivities of 35.9 and 45.7 dB/GHz, respectively.

Inspec keywords: waveguide filters; microwave filters; band-pass filters; coplanar waveguides; frequency response; UHF filters

Other keywords: open-ended CPW series stub; resonant circuit; coplanar waveguide band-pass filter design; frequency 1.97 GHz to 4 GHz; frequency response; band-pass response; S-band application; roll-off rate; open stub discontinuity; BPF; falling edge selectivities; rising edge selectivities

Subjects: Waveguides and microwave transmission lines; Waveguide and microwave transmission line components; Filters and other networks

References

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