Title :
An Improved Wideband Dipole Antenna for Global Navigation Satellite System
Author :
Wang EnCheng ; Shi LuYao
Author_Institution :
Inf. Eng. Coll., North China Univ. of Technol., Beijing, China
Abstract :
In this letter, an improved wideband dipole antenna is proposed for BEIDOU/GPS/GLONASS/GALILEO systems. The proposed antenna includes crossed narrow magneto-electric dipoles that are excited by two Γ-shaped strip probes, a 3-dB hybrid coupler, and reflecting plate. The experiment results reveal that the proposed antenna achieves a wide impedance bandwidth of 51.4% (1.1-1.85 GHz) for VSWR <; 1.5. A 3-dB axial-ratio bandwidth of 42.9% (1.1-1.7 GHz) and a gain of 5.6 ±0.6 dBi are covered by the whole operating band. Moreover, in the operating bandwidth, very stable, symmetrical radiation patterns and high gain at the low angle are obtained.
Keywords :
antenna radiation patterns; broadband antennas; dipole antennas; satellite navigation; waveguide couplers; Γ-shaped strip probes; BEIDOU; GALILEO system; GLONASS; GPS; bandwidth 1.1 GHz to 1.85 GHz; crossed narrow magneto-electric dipoles; global navigation satellite system; hybrid coupler; operating bandwidth; reflecting plate; symmetrical radiation patterns; wide impedance bandwidth; wideband dipole antenna; Antenna measurements; Antenna radiation patterns; Bandwidth; Broadband antennas; Couplers; Dipole antennas; Global Positioning System; 3-dB hybrid coupler; $Gamma$-shaped strip probes; circularly polarized; magneto-electric dipoles;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2335752
