Research on the development of super-low-cost high-efficiency small planar antennas by injection compression molding approach

(1)采用注射模压法制备了加载到波导阵天线上的介质球。其次，在11.8 GHz到12.2 GHz的频率范围内，对介质加载的波导阵天线进行了阻抗匹配。匹配后，一个波导天线(10个槽和10个介质球)的电压驻波比从4.0降到1.2。在f=12 GHz下进行的实验表明，采用介质缝隙后，天线的增益和远场辐射方向图(尤其是E面上的辐射方向图)都得到了改善。(2)利用1.8m直径的偏置反射面天线，搭建了X波段小型天线方向图测量的紧凑量程环境。发射偏振可以选择垂直或水平，或者两者都能实现圆偏振传输。结果表明，口径尺寸约为30 cm的测试天线是可行的。

(1)Dielectric spheres to be loaded on the waveguide array antennas are fabricated by injection compression molding approach. Next, impedance matching of a dielectric-loaded waveguide array antenna was conducted over the frequency range of 11.8 GHz to 12.2 GHz. After matching, the voltage standing wave ratio of a waveguide antenna (ten slots with ten dielectric spheres) was suppressed down to 1.2 from 4.0. It has been found by the experiment conducted at f=12 GHz that the antenna gain and the far-field radiation pattern (particularly in the E-plane) with the dielectric slots were improved.(2)A compact range environment for X-band small antenna pattern measurements has been constructed by using a 1.8m-diameter offset reflector antenna. The transmitting polarization can be chosen vertical or horizontal, or both enabling circularly-polarized transmission. It has been found that a test antenna with the aperture dimension approximately 30cm are applicable.