Vol. 18

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2010-11-12

High Selectivity Dual-Mode Bandpass Filter with Source-Loaded Coupling

By Xue-Shun Zhang, Yong-Jiu Zhao, Hong-Wei Deng, Lu Zhang, and Wen Chen
Progress In Electromagnetics Research Letters, Vol. 18, 187-194, 2010
doi:10.2528/PIERL10092001

Abstract

In this letter, a novel high selectivity microstrip filter with source-loaded coupling is proposed using the dual-mode resonator. The resonator can generate one odd mode and one even mode in the desired band. The folded stepped-impedance open stub at the central plane can control the even mode resonant frequencies, whereas the odd mode ones are fixed. A transmission zero is created near the lower cut-off frequency due to the main path signal counteraction. Two additional transmission zeros attributed to source-loaded coupling are generated near the upper cut-off frequency and in the upper-stopband. A dual-mode filter prototype is simulated, fabricated and measured. The EM simulated and measured results are presented and excellent agreement is obtained.

Citation


Xue-Shun Zhang, Yong-Jiu Zhao, Hong-Wei Deng, Lu Zhang, and Wen Chen, "High Selectivity Dual-Mode Bandpass Filter with Source-Loaded Coupling," Progress In Electromagnetics Research Letters, Vol. 18, 187-194, 2010.
doi:10.2528/PIERL10092001
http://test.jpier.org/PIERL/pier.php?paper=10092001

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