Open AccessDesign of frequency duplex and triplex antennas based on quarter‐mode substrate integrated waveguide
Author(s) -
Tong Yanghui,
Qian Zuping,
Cao Wenquan,
Shi Shujie,
Cai Yang
Publication year - 2019
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.2018.5080
Subject(s) - radiation , materials science , antenna (radio) , optoelectronics , dipole antenna , optics , electrical engineering , physics , engineering
In this study, a novel and compact design of frequency duplex antenna based on quarter‐mode substrate integrated waveguide (QMSIW) is presented. The proposed antenna consists of two orthogonal QMSIWs excited by two separate feed lines. Independent frequency tunability is exhibited by adjusting the size of QMSIW. The electric wall formed by metal vias is used to suppress the coupling between QMSIW units. Thus, a high isolation (>26.6 dB) is achieved, which promotes the frequency duplexing characteristic. The proposed antenna resonates at 4.83 and 5.0 GHz with magnetic dipole radiation patterns and has corresponding gains of 2.08 and 2.21 dBi, respectively. Furthermore, a model is proposed to achieve the frequency multiplexing characteristic by taking advantage of the stable port isolation while changing the angle of two QMSIWs. A frequency triplex antenna working at 4.86, 4.95, and 5.05 GHz is also designed, it still exhibits good isolation (>20 dB) and excellent radiation performance although the frequency ratio remains extremely low (1.02).