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Wideband circularly polarized leaky‐wave antenna with flat gain using printed ridge gap waveguide
Author(s) -
Shi ShuJie,
Qian ZuPing,
Ding WeiPing
Publication year - 2019
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.21751
Subject(s) - wideband , optics , materials science , bandwidth (computing) , leaky wave antenna , antenna (radio) , ka band , frequency band , waveguide , center frequency , optoelectronics , microstrip antenna , physics , electrical engineering , engineering , telecommunications , band pass filter
A wideband beam scanning circularly polarized (CP) leaky‐wave antenna (LWA) at Ku band is proposed based on the printed ridge gap waveguide (PRGW). In this design, the printed technology is used to realize the ridge gap waveguide (RGW) structure, and a substrate layer is introduced to replace the air gap layer in conventional RGWs. The proposed beam scanning CP LWA has been fabricated. Measured results of the fabricated antenna prototype are carried out to verify the simulation analysis. It provides a wide impedance bandwidth of 22% ranging from 12 to 15 GHz while performing continuous frequency beam scanning from −2° to +47°. Furthermore, it maintains the excellent CP characteristic with axial ratio (AR) below 1.5 dB and a flat gain response with variation less than 2 dB in the entire operation frequency band.