TY - JOUR
T1 - Wideband Pattern-Reconfigurable Antenna with Switchable Broadside and Conical Beams
AU - Lin, Wei
AU - Wong, Hang
AU - Ziolkowski, Richard W.
N1 - Funding Information:
Manuscript received July 28, 2017; accepted August 7, 2017. Date of publication August 11, 2017; date of current version September 25, 2017. This work was supported in part by the Australian Research Council under Grant DP160102219 and in part by the Research Grants Council of the Hong Kong SAR, China, under Project CityU 11216915.(Corresponding author: Wei Lin.) W. Lin and R. W. Ziolkowski are with the Global Big Data Technologies Centre, University of Technology Sydney, Sydney, NSW 2007, Australia (e-mail: wei.lin@uts.edu.au; Richard.Ziolkowski@uts.edu.au).
Publisher Copyright:
© 2017 IEEE.
PY - 2017/8/10
Y1 - 2017/8/10
N2 - A wideband, pattern-reconfigurable antenna is reported that is, for example, a good candidate for ceiling-mounted indoor wireless systems. Switchable linearly polarized broadside and conical radiation patterns are achieved by systematically integrating a wideband low-profile monopolar patch antenna with a wideband L-probe fed patch antenna. The monopolar patch acts as the ground for the L-probe fed patch, which is fed with a coaxial cable that replaces one shorting via of the monopolar patch to avoid deterioration of the conical-beam pattern. A simple switching feed network facilitates the pattern reconfigurability. A prototype was fabricated and tested. The measured results confirm the predicted wideband radiation performance. The operational impedance bandwidth, i.e., S 11 ≤-10 dB, is obtained as the overlap of the bands associated with both pattern modalities. It is wide, from 2.25 to 2.85 GHz (23.5%). Switchable broadside and conical radiation patterns are observed across this entire operating bandwidth. The peak measured gain was 8.2 dBi for the broadside mode and 6.9 dBi for the conical mode. The overall profile of this antenna is 0.13λ 0 at its lowest operating frequency.
AB - A wideband, pattern-reconfigurable antenna is reported that is, for example, a good candidate for ceiling-mounted indoor wireless systems. Switchable linearly polarized broadside and conical radiation patterns are achieved by systematically integrating a wideband low-profile monopolar patch antenna with a wideband L-probe fed patch antenna. The monopolar patch acts as the ground for the L-probe fed patch, which is fed with a coaxial cable that replaces one shorting via of the monopolar patch to avoid deterioration of the conical-beam pattern. A simple switching feed network facilitates the pattern reconfigurability. A prototype was fabricated and tested. The measured results confirm the predicted wideband radiation performance. The operational impedance bandwidth, i.e., S 11 ≤-10 dB, is obtained as the overlap of the bands associated with both pattern modalities. It is wide, from 2.25 to 2.85 GHz (23.5%). Switchable broadside and conical radiation patterns are observed across this entire operating bandwidth. The peak measured gain was 8.2 dBi for the broadside mode and 6.9 dBi for the conical mode. The overall profile of this antenna is 0.13λ 0 at its lowest operating frequency.
KW - Broadside pattern
KW - conical pattern
KW - patch antennas
KW - pattern-reconfigurable antennas
KW - reconfigurable antennas
KW - wideband
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U2 - 10.1109/LAWP.2017.2738101
DO - 10.1109/LAWP.2017.2738101
M3 - Article
AN - SCOPUS:85029185164
SN - 1536-1225
VL - 16
SP - 2638
EP - 2641
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
M1 - 8007174
ER -