A novel microstrip bandpass filter with four transmission zeros is proposed. Four transmission zeros close to the passband are realized to improve the selectivity for the passband. A sixthorder passband is realized with two shorted stubs and a dual-mode ring resonator. The transmission zeros near the passband can be adjusted conveniently by only changing the characteristic impedances of the coupled lines. For demonstration, a planar bandpass filter (3-dB bandwidth 21.9%) was designed and fabricated.
CITATION STYLE
Deng, K., Chen, Z., & Feng, W. (2015). Bandpass filter with four transmission zeros using dual-mode ring resonator. Progress in Electromagnetics Research Letters, 56, 129–132. https://doi.org/10.2528/PIERL15090404
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