TY - GEN
T1 - Bandwidth and F-B Ratio Enhancements of an Electrically-Small Crossed-Dipole Antenna Using an NFRP Reflector
AU - Ta, Son Xuat
AU - Park, Ikmo
AU - Ziolkowski, Richard W.
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/10/18
Y1 - 2017/10/18
N2 - In this paper, a compact single-feed crossed-dipole antenna backed by a near-field resonant parasitic (NFRP) element is proposed to enhance the bandwidth and front-to-back (F-B) ratio of the electrically small antenna system. The NFRP element is designed to not only act as a reflector, but also to generate an extra resonance with circularly polarized (CP) radiation for the antenna system. The extra resonances are utilized to broaden the antenna bandwidth. The final design with an overall size of 35 mm ´ 35 mm ´ 13.7 mm (0.184λo ´ 0.184λo ´ 0.072λo at 1.575 GHz) has a |S11| < −10 dB bandwidth of 20.3% (1.485–1.820 GHz), a 3-dB axial ratio bandwidth of 9.46% (1.510–1.660 GHz), and a maximum F-B ratio of 9.8 dB. Relative to the crossed-dipole antenna without a reflector, the proposed design increases the F-B ratio from 0 to 9.8 dB and achieves approximately 150% and 400% increases in |S11| < −10 dB and 3-dB AR bandwidths, respectively.
AB - In this paper, a compact single-feed crossed-dipole antenna backed by a near-field resonant parasitic (NFRP) element is proposed to enhance the bandwidth and front-to-back (F-B) ratio of the electrically small antenna system. The NFRP element is designed to not only act as a reflector, but also to generate an extra resonance with circularly polarized (CP) radiation for the antenna system. The extra resonances are utilized to broaden the antenna bandwidth. The final design with an overall size of 35 mm ´ 35 mm ´ 13.7 mm (0.184λo ´ 0.184λo ´ 0.072λo at 1.575 GHz) has a |S11| < −10 dB bandwidth of 20.3% (1.485–1.820 GHz), a 3-dB axial ratio bandwidth of 9.46% (1.510–1.660 GHz), and a maximum F-B ratio of 9.8 dB. Relative to the crossed-dipole antenna without a reflector, the proposed design increases the F-B ratio from 0 to 9.8 dB and achieves approximately 150% and 400% increases in |S11| < −10 dB and 3-dB AR bandwidths, respectively.
KW - Broadband
KW - Circular polarization
KW - Crossed dipole
KW - Directive radiation
KW - Near-field resonant parasitic reflector
UR - http://www.scopus.com/inward/record.url?scp=85042207734&partnerID=8YFLogxK
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U2 - 10.1109/APUSNCURSINRSM.2017.8072314
DO - 10.1109/APUSNCURSINRSM.2017.8072314
M3 - Conference contribution
AN - SCOPUS:85042207734
T3 - 2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
SP - 543
EP - 544
BT - 2017 IEEE Antennas and Propagation Society International Symposium, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2017
Y2 - 9 July 2017 through 14 July 2017
ER -