Title :
A Novel Miniaturized Broadband Dual-Polarized Dipole Antenna for Base Station
Author :
Ying Liu ; Hao Yi ; Fu-Wei Wang ; Shu-Xi Gong
Author_Institution :
Nat. Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China
Abstract :
A novel dual-polarized dipole antenna for base-station applications is presented in this letter. The proposed antenna is composed of a cross dipole, a square loop, a square plate, and a small-size reflector. The square loop and the square plate act as a parasitic radiator and a director, respectively. By introducing the two parts, the impedance bandwidth of the cross dipole can be significantly enhanced, and broadside radiation patterns with narrow beam can be also obtained. Experimental results show that the proposed antenna can operate from 1.71 to 2.69 GHz with low VSWRs at the two ports. High isolation ( > 22 dB) and stable antenna gain (~ 8 dB) are also achieved over the entire operating frequency band. The antenna has symmetrical radiation patterns both in vertical and horizontal planes, and the half-power beamwidth is 70°±5°. Furthermore, the size of the proposed antenna is very compact, which is only 0.513 λ0 ×0.513 λ0 ×0.388 λ0 at the center of the operating frequency band.
Keywords :
antenna radiation patterns; broadband antennas; dipole antennas; electromagnetic wave polarisation; mobile radio; multifrequency antennas; reflector antennas; base station; broadside radiation pattern; cross dipole; director; frequency 1.71 GHz to 2.69 GHz; half power beamwidth; impedance bandwidth; miniaturized broadband dual polarized dipole antenna; parasitic radiator; reflector; square loop; square plate; Antenna measurements; Antenna radiation patterns; Bandwidth; Broadband antennas; Dipole antennas; Impedance; Broadband antenna; cross dipole; director; dual-polarized antenna; miniaturized antenna; square loop;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2285373