A Novel Miniaturized Broadband Dual-Polarized Dipole Antenna for Base Station
A Novel Miniaturized Broadband Dual-Polarized Dipole Antenna for Base Station
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DOI：
10.1109/lawp.2013.2285373
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发表时间：
2013-10
影响因子：
4.2
通讯作者：
Y. Liu;Hao Yi;Fuwei Wang;S. Gong
中科院分区：
文献类型：
--
作者：
Y. Liu;Hao Yi;Fuwei Wang;S. Gong
本文介绍了一种用于基站的新型双极化偶极天线。该天线由一个十字偶极子、一个正方形环路、一个正方形平板和一个小尺寸反射面组成。方形环路和方板分别充当寄生辐射体和导向器。通过引入这两个部分，可以显著提高交叉偶极子的阻抗带宽，还可以得到窄波束的宽边辐射方向图。实验结果表明，该天线可以工作在1.71~2.69 GHz范围内，且两端均具有较低的驻波比。在整个工作频段内，还实现了高隔离度(>；22分贝)和稳定的天线增益(~8分贝)。该天线在垂直和水平两个平面上具有对称的辐射方向图，半功率波束宽度为70°±5°。此外，该天线的尺寸非常紧凑，在工作频段的中心位置仅为0.513λ0×0.513λ0×0.388λ0。
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.