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A coplanar waveguide‐fed flexible antenna for ultra‐wideband applications
Author(s) -
Zhang Ying,
Li Shandong,
Yang ZhiQun,
Qu XiaoYun,
Zong WeiHua
Publication year - 2020
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.22258
Subject(s) - materials science , coplanar waveguide , coaxial antenna , omnidirectional antenna , radiation pattern , microstrip antenna , bent molecular geometry , monopole antenna , optoelectronics , patch antenna , antenna efficiency , optics , bandwidth (computing) , printed circuit board , antenna factor , antenna (radio) , acoustics , electrical engineering , physics , telecommunications , computer science , engineering , composite material , microwave
This paper presents a novel ultra‐wideband (UWB) antenna printed on a 70 μm thick flexible substrate. The proposed antenna consists of a hybrid‐shaped patch fed by coplanar waveguide (CPW). The ground planes on opposite sides of the feeding line have different height to improve antenna bandwidth. Simulation shows that the proposed antenna maintain wide bandwidth when changing its substrate's thickness and dielectric constant, as well as bending the antenna on a cylindrical foam. The proposed antenna is fabricated in laboratory with a simple and low‐cost wet printed circuit board (PCB) etching technique. Measured bandwidths cover 3.06 to 13.58, 2.8 to 13.55, and 3.1 to 12.8 GHz in cases of flat state and bent with radii of 20 and 10 mm, respectively. Measured radiation patterns show the antenna is omnidirectional in flat and bent cases.