Microstrip filter with multiple transmission zeros using shorted stub loaded resonators | Zendy

Wu L. | Zendy; Shen W. | Zendy; Sun X.W. | Zendy

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Microstrip filter with multiple transmission zeros using shorted stub loaded resonators

Author(s) -

Wu L.,

Shen W.,

Sun X.W.

Publication year - 2013

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2013.3068

Subject(s) - stub (electronics) , microstrip , resonator , electronic engineering , acoustics , filtering theory , distributed element filter , materials science , filter (signal processing) , computer science , low pass filter , electrical engineering , engineering , prototype filter , physics , optoelectronics , algorithm

A novel microstrip bandpass filter with multiple transmission zeros is proposed, where two half‐wavelength resonators loaded by short‐circuited stubs are implemented into its design. A section of coupled lines and a grounded via‐hole are introduced to serve as a capacitor and an inductor, respectively. Then, four controllable transmission zeros can be successfully obtained, and the locations of two outer transmission zeros are controlled by the diameter of the via‐hole. A second‐order filter sample with better frequency selectivity and wide stopband was fabricated using standard printed circuit board (PCB) technology, and its measured S ‐parameters agree well with the simulated ones.

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