TY - JOUR
T1 - UHF/UWB Tag Antenna of Circular Polarization
AU - Gao, Xiang
AU - Shen, Zhongxiang
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/9
Y1 - 2016/9
N2 - A Dual-Band circularly polarized (CP) tag antenna is presented in this paper, which combines ultrahigh-frequency (UHF) and ultrawideband (UWB) operations for radio-frequency identification (RFID) and high-precision localization applications. The proposed antenna consists of two CP radiating elements with separated ports, where the UHF element is a planar loop antenna loaded with two pairs of meander lines of different dimensions for compactness and CP radiation, while the UWB element is a modified Archimedean spiral antenna with a tapered metallization ratio and encircled by the UHF loop. In addition, a miniaturized shunt-stub is employed in the UHF element to realize conjugate matching between the antenna and the UHF RFID chip. Experimental characterization of a fabricated prototype has validated the design, which shows that the proposed antenna exhibits very good radiation performance at both the bands, with-10 dB power reflection bandwidths of 0.86-0.975 GHz and 2.6-12 GHz, and 3 dB axial-ratio bandwidths of 0.911-0.938 GHz and 3.1-11.1 GHz, respectively. This antenna can find applications in RFID and indoor positioning systems.
AB - A Dual-Band circularly polarized (CP) tag antenna is presented in this paper, which combines ultrahigh-frequency (UHF) and ultrawideband (UWB) operations for radio-frequency identification (RFID) and high-precision localization applications. The proposed antenna consists of two CP radiating elements with separated ports, where the UHF element is a planar loop antenna loaded with two pairs of meander lines of different dimensions for compactness and CP radiation, while the UWB element is a modified Archimedean spiral antenna with a tapered metallization ratio and encircled by the UHF loop. In addition, a miniaturized shunt-stub is employed in the UHF element to realize conjugate matching between the antenna and the UHF RFID chip. Experimental characterization of a fabricated prototype has validated the design, which shows that the proposed antenna exhibits very good radiation performance at both the bands, with-10 dB power reflection bandwidths of 0.86-0.975 GHz and 2.6-12 GHz, and 3 dB axial-ratio bandwidths of 0.911-0.938 GHz and 3.1-11.1 GHz, respectively. This antenna can find applications in RFID and indoor positioning systems.
KW - Circularly polarized (CP) antenna
KW - Ultrawideband (UWB)
KW - dual-band tag antenna
KW - ultrahigh-frequency (UHF)
UR - http://www.scopus.com/inward/record.url?scp=84987630618&partnerID=8YFLogxK
U2 - 10.1109/TAP.2016.2583547
DO - 10.1109/TAP.2016.2583547
M3 - Article
AN - SCOPUS:84987630618
SN - 0018-926X
VL - 64
SP - 3794
EP - 3802
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
IS - 9
M1 - 7497456
ER -