具有谐波抑制功能的双极化缝隙天线

针对微波能量传输领域中接收天线与发射天线发生极化失配时，整流天线接收的能量会急剧下降的问题，设计了一款工作在2.45 GHz具有谐波抑制功能的双极化缝隙接收天线，该接收天线本身发生一定角度旋转时仍可通过双极化的特性接收能量。通过在贴片上开大小合适、结构对称的缝隙，实现天线水平极化和垂直极化；运用缺陷地结构，实现谐波抑制功能。仿真结果显示，在2.45 GHz处，天线的隔离度高于17.6 dB，增益3.9 dBi，阻抗匹配良好，在二次、三次谐波处天线的回波损耗为-0.38 dB和-0.96 dB，仿真结果和实测基本吻合。

Dual polarized slot antenna with harmonic suppression

In the field of microwave power transmission, when the polarization mismatch between receiving antenna and transmitting antenna occurs, the energy received by rectifier antenna will decrease sharply. A dual polarized slot receiving antenna with harmonic suppression function at 2.45 GHz is designed. The receiving antenna can receive energy even when it rotates at a certain angle. The horizontal and vertical polarization of the antenna can be realized by opening a suitable size and symmetrical structure slot on the patch, and the harmonic suppression function can be realized by using defected ground structure. The simulation results show that at 2.45 GHz, the isolation degree of the antenna is higher than 17.6 dB, the gain is 3.9 dBi and the impedance matching is good. The echo loss of the antenna at the second and third harmonics is -0.38 dB and -0.96 dB. The simulation results are in good agreement with the measured ones.