TY - JOUR
T1 - Polarization-Reconfigurable Leaky-Wave Antenna with Continuous Beam Scanning through Broadside
AU - Chen, Shu Lin
AU - Karmokar, Debabrata K.
AU - Qin, Pei Yuan
AU - Ziolkowski, Richard W.
AU - Guo, Y. Jay
N1 - Funding Information:
Manuscript received November 20, 2018; revised June 15, 2019; accepted August 6, 2019. Date of publication August 19, 2019; date of current version January 3, 2020. This work was supported in part by the Australian Research Council (ARC) Discovery Project (DP) under Grant 160102219 and in part by Discovery Early Career Researcher Award (DECRA) under Grant DE170101203. (Corresponding author: Debabrata K. Karmokar.) S.-L. Chen, P.-Y. Qin, R. W. Ziolkowski, and Y. J. Guo are with the Global Big Data Technologies Centre (GBDTC), University of Technology Sydney (UTS), Ultimo, NSW 2007, Australia (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).
Publisher Copyright:
© 2019 IEEE.
PY - 2020/1
Y1 - 2020/1
N2 - A simple single-layer reconfigurable leaky-wave antenna (LWA) is presented that has polarization agility and beam-scanning functionality. This LWA system realizes a scanned beam that can be switched between all of its linear polarization (LP) and circular polarization (CP) states using only one dc biasing source. A slot-loaded substrate-integrated waveguide (SIW)-based LWA is first explored to attain CP performance with continuous beam scanning through broadside. This CP LWA realizes a measured CP performance with a 3 dB gain variance within 2.75-3.35 GHz for scan angles ranging from -28.6° to +31.5°. A row of shorted stubs is then incorporated into the CP LWA to obtain similar LP performance. Finally, by introducing p-i-n diodes into this LP LWA configuration to facilitate reconfigurable connections between the main patch and the shorted stubs, the radiated fields can be switched between all of its CP and LP states. The measured results of all three antennas confirm their simulated performance. It is demonstrated that the main beam of the polarization-reconfigurable LWA can be scanned from -31.5° to +17.1° with gain variations between 9.5 and 12.8 dBic in its CP state and from -34.3° to +20° with them between 7.8 and 11.7 dBi in its LP state.
AB - A simple single-layer reconfigurable leaky-wave antenna (LWA) is presented that has polarization agility and beam-scanning functionality. This LWA system realizes a scanned beam that can be switched between all of its linear polarization (LP) and circular polarization (CP) states using only one dc biasing source. A slot-loaded substrate-integrated waveguide (SIW)-based LWA is first explored to attain CP performance with continuous beam scanning through broadside. This CP LWA realizes a measured CP performance with a 3 dB gain variance within 2.75-3.35 GHz for scan angles ranging from -28.6° to +31.5°. A row of shorted stubs is then incorporated into the CP LWA to obtain similar LP performance. Finally, by introducing p-i-n diodes into this LP LWA configuration to facilitate reconfigurable connections between the main patch and the shorted stubs, the radiated fields can be switched between all of its CP and LP states. The measured results of all three antennas confirm their simulated performance. It is demonstrated that the main beam of the polarization-reconfigurable LWA can be scanned from -31.5° to +17.1° with gain variations between 9.5 and 12.8 dBic in its CP state and from -34.3° to +20° with them between 7.8 and 11.7 dBi in its LP state.
KW - Beam scanning
KW - circular polarization (CP)
KW - leaky-wave antenna (LWA)
KW - linear polarization (LP)
KW - polarization-reconfigurable
KW - traveling wave
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U2 - 10.1109/TAP.2019.2935122
DO - 10.1109/TAP.2019.2935122
M3 - Article
AN - SCOPUS:85077955790
SN - 0018-926X
VL - 68
SP - 121
EP - 133
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 1
M1 - 8805237
ER -