TY - JOUR
T1 - Circular-polarized substrate-integrated-waveguide leaky-wave antenna with wide-angle and consistent-gain continuous beam scanning
AU - Chen, Shu Lin
AU - Karmokar, Debabrata K.
AU - Li, Zheng
AU - Qin, Pei Yuan
AU - Ziolkowski, Richard W.
AU - Guo, Y. Jay
N1 - Funding Information:
Manuscript received September 27, 2018; revised February 25, 2019; accepted March 19, 2019. Date of publication April 15, 2019; date of current version July 3, 2019. This work was supported in part by the Australian Research Council (ARC) Discovery Project (DP) under Grant 160102219, in part by the Discovery Early Career Researcher Award (DECRA) under Grant DE170101203, and in part by the National Natural Science Foundation of China under Grant 61771038. (Corresponding author: Shu-Lin Chen.) S.-L. Chen, D. K. Karmokar, P.-Y. Qin, R. W. Ziolkowski, and Y. J. Guo are with the Global Big Data Technologies Center (GBDTC), University of Technology Sydney (UTS), Ultimo, NSW 2007, Australia (e-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 2019 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - Circularly polarized (CP) antennas are in high demand for use in future wireless communications. To advance the development of CP substrate-integrated-waveguide (SIW) leaky-wave antennas (LWAs) with the intent to meet this demand, a novel benzene-ring-shaped slot-loaded LWA with partially reflecting wall (PRW) vias is investigated and verified to realize wide-angle continuous beam scanning with consistent gain. The dispersion features of slot-loaded SIW LWAs with PRW vias are theoretically explored using an equivalent circuit model. The CP radiation feature is investigated numerically utilizing the E- A nd H-field distributions of an initial design and its equivalent magnetic currents. The results of these studies are used to demonstrate that improved CP performance over a wide-angle scan range can be attained with a change from a standard slot shape to a benzene-ring-shaped slot. The resulting benzene-ring-shaped slot-loaded CP SIW LWA was optimized, fabricated, and measured. The measured results verify that a CP beam was continuously scanned through a wide angle from backward to forward directions with a consistent gain. The prototype exhibits a continuous 97.1° CP beam scan with a gain variation between 8 and 11.3 dBic when the source frequency is swept from 9.35 to 11.75 GHz.
AB - Circularly polarized (CP) antennas are in high demand for use in future wireless communications. To advance the development of CP substrate-integrated-waveguide (SIW) leaky-wave antennas (LWAs) with the intent to meet this demand, a novel benzene-ring-shaped slot-loaded LWA with partially reflecting wall (PRW) vias is investigated and verified to realize wide-angle continuous beam scanning with consistent gain. The dispersion features of slot-loaded SIW LWAs with PRW vias are theoretically explored using an equivalent circuit model. The CP radiation feature is investigated numerically utilizing the E- A nd H-field distributions of an initial design and its equivalent magnetic currents. The results of these studies are used to demonstrate that improved CP performance over a wide-angle scan range can be attained with a change from a standard slot shape to a benzene-ring-shaped slot. The resulting benzene-ring-shaped slot-loaded CP SIW LWA was optimized, fabricated, and measured. The measured results verify that a CP beam was continuously scanned through a wide angle from backward to forward directions with a consistent gain. The prototype exhibits a continuous 97.1° CP beam scan with a gain variation between 8 and 11.3 dBic when the source frequency is swept from 9.35 to 11.75 GHz.
KW - Circularly polarized (CP)
KW - consistent gain
KW - continuous beam scanning
KW - leaky-wave antenna (LWA)
KW - substrate-integrated waveguide (SIW)
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U2 - 10.1109/TAP.2019.2911398
DO - 10.1109/TAP.2019.2911398
M3 - Article
AN - SCOPUS:85068642501
SN - 0018-926X
VL - 67
SP - 4418
EP - 4428
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 7
M1 - 8691765
ER -