Li Xue-Ping, He Chao-Liang, Ji Jun-Fei, Yang Meng-Bing, Zhang Yan, Zhang An-Xue, Li Wei
College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang 453600, China.
Henan Key Laboratory of Optoelectronic Sensing Integrated Application, Henan Normal University, Xinxiang 453600, China.
Micromachines (Basel). 2024 Dec 31;16(1):48. doi: 10.3390/mi16010048.
A novel common-aperture miniaturized antenna with wideband and dual-polarized characteristics is proposed, which consists of a circularly polarized (CP) and a linearly polarized (LP) antenna. The circularly polarized antenna stacked on the upper layer adopts asymmetrical ground and introduces the patch and T-type feed network. On this basis, the meshed reflector structure, which also works as a ground plane for the LP antenna, is added to reduce the influence on circular polarization and achieve directional radiation. The LP antenna stacked in the lower layer uses a monopole structure, and the coaxial feed line perforates the reflector, and thereby the common-aperture antennas are tightly stacked together from top to bottom. Simulation and test are in good accordance, and the results show that the two ports of the antenna are well matched in the range of 5.5 GHz to 7.8 GHz, where peak gains of 8.5 dB and 6 dB are realized for circular polarization and linear polarization, respectively. Moreover, the 3 dB axial ratio (AR) bandwidth of the CP antenna is 34.3% and the isolation between the two ports is better than 15 dB, suggesting potential applications in the relay platform or drone detection for signal transmission and reception.
提出了一种具有宽带和双极化特性的新型共口径小型化天线，它由一个圆极化（CP）天线和一个线极化（LP）天线组成。堆叠在上层的圆极化天线采用非对称接地，并引入了贴片和T型馈电网络。在此基础上，增加了网状反射器结构，该结构同时作为LP天线的接地平面，以减少对圆极化的影响并实现定向辐射。堆叠在下层的LP天线采用单极结构，同轴馈线穿过反射器，从而使共口径天线从上到下紧密堆叠在一起。仿真和测试结果吻合良好，结果表明，天线的两个端口在5.5 GHz至7.8 GHz范围内匹配良好，其中圆极化和线极化的峰值增益分别为8.5 dB和6 dB。此外，CP天线的3 dB轴比（AR）带宽为34.3%，两个端口之间的隔离度优于15 dB，表明其在中继平台或无人机检测中的信号发射和接收方面具有潜在应用。
