Title :
Crossed Dipole Loaded With Magneto-Electric Dipole for Wideband and Wide-Beam Circularly Polarized Radiation
Author :
Son Xuat Ta ; Ikmo Park
Author_Institution :
Dept. of Electr. & Comput. Eng., Ajou Univ., Suwon, South Korea
Abstract :
A crossed dipole that is loaded with a magneto-electric dipole to produce the wideband and wide-beam circularly polarized radiation characteristics is proposed. The crossed dipole is incorporated with double-printed vacant-quarter rings to feed the antenna. The antenna is backed by a metallic cavity to provide a unidirectional radiation pattern with a wide axial-ratio (AR) beamwidth and a high front-to-back ratio. Experimental results showed that the prototype with an overall size of 120×120×30.5 mm3 has a |S11|<;-10 dB bandwidth of 1.274-2.360 GHz and a 3-dB AR bandwidth of 1.39-1.82 GHz. The antenna showed a right-hand circular polarization (CP) radiation with a very wide 3-dB AR beamwidth (>165°) and a high radiation efficiency (>94%) within the operational bandwidth.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; broadband antennas; dipole antennas; multifrequency antennas; bandwidth 1.274 GHz to 2.360 EHz; bandwidth 1.39 GHz to 1.82 GHz; crossed dipole; double-printed vacant-quarter rings; high front-to-back ratio; magneto-electric dipole; metallic cavity; right-hand circular polarization radiation; unidirectional radiation pattern; wide axial-ratio beamwidth; wide-beam circularly polarized radiation characteristics; wideband circularly polarized radiation characteristics; Antenna measurements; Antenna radiation patterns; Broadband antennas; Dipole antennas; Global Positioning System; Wideband; Circular polarization; crossed dipole; magneto-electric dipole; single feed; wide-beam; wideband;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2363944
