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A planar bandpass filter based on a technique that utilizes quarter mode of substrate integrated waveguide (SIW) is presented. This concept reduces the circuit foot print of SIW to a quarter of its size, along with miniaturization good performance and high quality factor is maintained by the structure. The design concept for single-pole resonator structure is presented; and by coupling the resonators a two-pole substrate integrated waveguide bandpass filter is achieved for the frequency of 5.9 GHz. The results show that the filter insertion losses are better than 2 dB and return losses are less than 20 dB. The measured frequency response is in good agreement with the simulated response in the region of interest. © 2013 IEEE.
RFM 2013 - 2013 IEEE International RF and Microwave Conference, Proceedings
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