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Compact wideband microstrip‐to‐microstrip vertical transition with extended upper stopband
Author(s) -
Yang Li,
Zhu Lei,
Choi WaiWa,
Tam KamWeng,
Zhang Runqi
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21228
Subject(s) - stopband , wideband , microstrip , resonator , acoustics , electrical impedance , transition band , electronic engineering , physics , materials science , bandwidth (computing) , topology (electrical circuits) , optoelectronics , telecommunications , computer science , electrical engineering , optics , engineering , low pass filter , prototype filter
In this article, a compact wideband microstrip‐to‐microstrip (MS‐to‐MS) vertical transition designed with a slotline stepped‐impedance resonator (SIR) is first presented. Compared with the existing wideband transitions, this proposed transition centered at f 0 can tremendously extend its upper stopband via two introduced transmission zeros around 3f 0 and 5f 0 . With the designed equivalent circuit, the working principle is theoretically discussed. To realize the size compactness of this proposed wideband transition, the slotline SIR is replaced by two back‐to‐back connected slotline Y‐junctions. Finally, a prototype wideband transition is simulated and fabricated. A wideband filtering response with its upper stopband up to 6.06 GHz under attenuation better than 15 dB is experimentally achieved as expected in the simulation.