A Wideband Differentially Driven Dual-Polarized Antenna by Using Integrated Six-Port Power Divider
A Wideband Differentially Driven Dual-Polarized Antenna by Using Integrated Six-Port Power Divider
复制标题
DOI：
10.1109/tap.2019.2930205
复制
发表时间：
2019-08
影响因子：
5.7
通讯作者：
Lehu Wen;S. Gao;Q. Luo;Wei Hu;Qingling Yang;Yingzeng Yin;Xiaofei Ren;Jian Wu
中科院分区：
文献类型：
--
作者：
Lehu Wen;S. Gao;Q. Luo;Wei Hu;Qingling Yang;Yingzeng Yin;Xiaofei Ren;Jian Wu
提出了一种设计具有高共模抑制和高端口隔离度的宽带差分驱动双极化天线的新方法。所提出的天线可以等效为六端口功率分配器和四个交叉折叠偶极子的组合。六端口功率分配器由两个正交输入端口和四个等幅输出端口组成。详细分析表明，该六端口功分器在奇模激励下可实现宽带宽、高隔离度，在偶模激励下可实现高共模抑制。因此，在宽带高偶模抑制六端口功分器的基础上，开发了一种高共模抑制的宽带差分驱动双极化天线。为了验证设计概念，对所提出的天线进行了设计、制造和测量。测量结果证明，该天线具有1.64-3.0 GHz（58.6%）的宽阻抗带宽，回波损耗高于15 dB，隔离度高于35.4 dB。此外，在整个带宽上测得的共模反射系数高于-0.87 dB，实现了非常高的共模抑制。所开发的天线具有稳定的天线增益和半功率波束宽度，适合基站应用。
A new method to design wideband differentially driven dual-polarized antenna with high common-mode suppression and high port isolation is presented. The presented antenna can be equivalent as a combination of a six-port power divider and four crossed folded dipoles. The six-port power divider is composed of two orthogonal input ports and four equal magnitude output ports. Detailed analysis illustrates that the six-port power divider can have wide bandwidth and high isolation under odd-mode excitation and high common-mode suppression under even-mode excitation. Therefore, based on the wideband and high even-mode suppressed six-port power divider, a wideband differentially driven dual-polarized antenna is developed with high common-mode suppression. To validate the design concept, the proposed antenna was designed, fabricated, and measured. The measured results prove that the antenna has a wide impedance bandwidth of 1.64–3.0 GHz (58.6%) for the return loss higher than 15 dB and isolation higher than 35.4 dB. In addition, very high common-mode suppression is achieved for the measured common-mode reflection coefficient higher than −0.87 dB over the entire bandwidth. With stable antenna gain and half-power beamwidth, the developed antenna is suitable for base station applications.