Design and Fabrication of Band Pass Filter (BPF) Based on Substrate Integrated Waveguide (SIW) Technology for Communication Applications
journal of kerbala university,
2013, Volume 9, Issue 3, Pages 186-194
AbstractIn this paper a new filter is constructed by embedding two semi-circular slots have been in the SIW structure for use in X-band applications. The insertion of these slots has successfully led to the compact size and the wide bandwidth. The cavity dimensions are 9.94×13.09 mm2 while the overall filter dimensions are 26.6×14 mm2 using a substrate with relative permittivity of 2.2 and thickness of 0.245 mm. The resulting structure exhibits a return loss less than -15 dB and insertion loss approaching to -0.26 dB over the passband, while a fractional bandwidth of about 68.4% centered at 11.7 GHz. An acceptable agreement between the experimental and simulation results. The compact size offered by this filter makes it a suitable for use in designing microwave circuits. The simulation and performance evaluation of the proposed filter have been carried out using Microwave Studio Suite of Computer Simulation Technology (CST).
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