volume | PIER Journals

2019-05-31

Miniaturized HMSIW Bandpass Filter Based on the Coupling of Dual-Iris with Nested Stepped-Impedance CSRRs

Bo Yin,

Dr. Bo Yin

College of Electronic Engineering

Chongqing University of Post and Telecommunications

China

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Zhangyao Lin,

Mr. Zhangyao Lin

College of Optoelectronic Engineering

Chongqing University of Posts and Telecommunications

China

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Honggang Hao,

Dr. Honggang Hao

College of Electronic Engineering

Chongqing University of Posts and Telecommunications

China

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Wei Luo,

Dr. Wei Luo

College of Electronic Engineering

Chongqing University of Posts and Telecommunications

China

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Wen Huang

Dr. Wen Huang

College of Electronic Engineering

Chongqing University of Posts and Telecommunications

China

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Progress In Electromagnetics Research Letters, Vol. 84, 115-121, 2019

doi:10.2528/PIERL19022604

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 0.0396λ_g². The experimental results are basically consistent with the simulation ones.

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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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