TY - GEN
T1 - A miniaturized, circularly polarized antenna for an active 433.92MHz RFID handheld reader
AU - Yu, Jay J.
AU - Lim, Sungkyun
PY - 2010
Y1 - 2010
N2 - Radio Frequency Identification (RFID) technology has been popular for its wide variety of applications over the past decade. In one of these applications, an RFID system has been used as a handheld device for easier asset tracking. Unlike handheld RFID readers in the passive UHF (865 - 956 MHz) band, however, active 433.92 MHz RFID handheld readers are not common. One of main reasons is that the antennas in 433.92 MHz are physically larger than are those in an 865 - 956 MHz system. Most commercialized 433.92 MHz handheld RFID readers that do exist use Linearly Polarized (LP) antennas, such as a quarter-wavelength whip [1, 2], and the gain of the whip in handheld readers is only -3 dBi [3] due to the small size of the ground plane in a handheld device [3]. Rhyu et al. presented an omni-directional, low-profile LP RFID reader antenna for the 433.92-MHz application [4]; however, the designed antenna is not appropriate for handheld applications because of the large size of the antenna and ground plane. Circular Polarization (CP) of the RFID reader antenna is also preferred, in order to enhance the detectability of the tag antenna, which is generally placed arbitrarily, and the tag antenna is normally LP. Recently, Choi et al. suggested a CP RFID reader antenna in passive UHF (900 MHz band) for a handheld application [5].
AB - Radio Frequency Identification (RFID) technology has been popular for its wide variety of applications over the past decade. In one of these applications, an RFID system has been used as a handheld device for easier asset tracking. Unlike handheld RFID readers in the passive UHF (865 - 956 MHz) band, however, active 433.92 MHz RFID handheld readers are not common. One of main reasons is that the antennas in 433.92 MHz are physically larger than are those in an 865 - 956 MHz system. Most commercialized 433.92 MHz handheld RFID readers that do exist use Linearly Polarized (LP) antennas, such as a quarter-wavelength whip [1, 2], and the gain of the whip in handheld readers is only -3 dBi [3] due to the small size of the ground plane in a handheld device [3]. Rhyu et al. presented an omni-directional, low-profile LP RFID reader antenna for the 433.92-MHz application [4]; however, the designed antenna is not appropriate for handheld applications because of the large size of the antenna and ground plane. Circular Polarization (CP) of the RFID reader antenna is also preferred, in order to enhance the detectability of the tag antenna, which is generally placed arbitrarily, and the tag antenna is normally LP. Recently, Choi et al. suggested a CP RFID reader antenna in passive UHF (900 MHz band) for a handheld application [5].
UR - http://www.scopus.com/inward/record.url?scp=78349236622&partnerID=8YFLogxK
U2 - 10.1109/APS.2010.5561156
DO - 10.1109/APS.2010.5561156
M3 - Conference article
AN - SCOPUS:78349236622
SN - 9781424449682
T3 - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
BT - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
T2 - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
Y2 - 11 July 2010 through 17 July 2010
ER -