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2019-05-31
Miniaturized HMSIW Bandpass Filter Based on the Coupling of Dual-Iris with Nested Stepped-Impedance CSRRs
By
Progress In Electromagnetics Research Letters, Vol. 84, 115-121, 2019
Abstract
A novel miniaturized bandpass half-mode substrate integrated waveguide (HMSIW) filter which uses dual-iris coupling method to load complementary split-ring resonators (CSRRs) into HMSIW is proposed in this paper. By modifying traditional CSRRs through nesting method combined with step impedance structure, a nested stepped-impedance complementary split-ring resonator (NSICSRR) structure with higher equivalent capacitance and inductance of CSRR is obtained. Based on the traditional single-iris coupling method, a dual-iris coupling method is developed. And NSICSRR is loaded into HMSIW by using the dual-iris coupling method, which can reduce the resonant frequency of the structure. In order to verify the effectiveness of the technology above in realizing the miniaturization of HMSIW filter, a second-order HMSIW filter is designed and measured. It can be found in the measured results that the filter has the center frequency of 6.35 GHz, the 3 dB bandwidth of 690 MHz, the return loss of better than 14 dB within the passband, and the size of 0.0396λg2. The experimental results are basically consistent with the simulation ones.
Citation
Bo Yin, Zhangyao Lin, Honggang Hao, Wei Luo, and Wen Huang, "Miniaturized HMSIW Bandpass Filter Based on the Coupling of Dual-Iris with Nested Stepped-Impedance CSRRs ," Progress In Electromagnetics Research Letters, Vol. 84, 115-121, 2019.
doi:10.2528/PIERL19022604
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