Open AccessMiniaturised printed slot antenna with multi‐ring technique for dual‐band and broadband operations
Author(s) -
Chiang MengJu,
Wang Sen,
Hsu ChunChieh
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0161
Subject(s) - broadband , multi band device , ring (chemistry) , dual (grammatical number) , slot antenna , antenna (radio) , electronic engineering , materials science , electrical engineering , computer science , engineering , telecommunications , optoelectronics , microstrip antenna , art , chemistry , organic chemistry , literature
Miniaturised microstrip‐line‐fed slot antennas with ring‐shaped metallic strips for dual‐band and broadband operations are investigated and verified in this study. The proposed designs implemented on a 0.8‐mm FR‐4 substrate show that the ring‐shaped metallic strips and the feeding structure yield multiple resonant modes, achieving 66.3% size reduction. The proposed dual‐band design reveals two operating bandwidths (12.4 and 46.5%) at the central frequencies of 2445 and 4813 MHz, respectively. The broadband design indicates the maximum bandwidth of 2511 MHz (69.6%) at 3606 MHz. This large operating bandwidth is obtained by choosing suitable combinations of feeding structure and multi‐ring slot shapes. Simulated and experimental investigations are clearly conducted to understand their behaviours and optimise them for dual‐band and broadband operations.