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An ultra‐wideband out‐of‐phase power divider based on odd‐mode spoof surface plasmon polariton
Author(s) -
Xu HanTao,
Guan DongFang,
Yang ZhangBiao,
Zhang Qingfeng,
Liu Li,
Xu Shenda,
Yong ShaoWei
Publication year - 2021
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.22583
Subject(s) - surface plasmon polariton , wideband , power dividers and directional couplers , bandwidth (computing) , insertion loss , materials science , optics , surface plasmon , optoelectronics , wilkinson power divider , plasmon , physics , telecommunications , computer science , frequency divider
In this article, a feasible design of an ultra‐wideband power divider (PD) based on spoof surface plasmon polariton (SSPP) is proposed. A quasi T‐junction transmission structure is composed of the sub‐wavelength corrugated grooves drilled on the up metal layer, realizing the wideband and low loss for the propagation of the odd‐mode SSPP wave. The consistency of the dispersion curves between the H‐shaped and the U‐shaped unit cells under the same dimension parameters ensures the smooth transition at the bifurcation point and out‐of‐phase property further. The odd‐mode SSPP is effectively excited by using the microstrip‐to‐slotline convertor. Some design details like gradient corrugations and stepped slotlines are employed to achieve high‐coupling efficiency from the input electromagnetic energy. The simulated and measured results show that the proposed PD achieves 180° ± 5° phase difference over an ultra‐wideband from 3.3 to 9.8 GHz (a relative bandwidth of 99.24%) with high‐transmission efficiency. The ultra‐wideband out‐of‐phase property of this design has potential applications in the differential feed network.