双层介质板开槽弹载宽频带GPS共形天线

Double Medium Plate Slotted Projectile GPS Broadband Conformal Antenna

针对目前弹载GPS共形天线,在无线电引信特定尺寸和安装环境下工作带宽窄的问题,提出双层介质板开槽弹载宽频带GPS共形天线。该天线采用双层介质板作为天线辐射单元的衬底,通过两种不同介电常数的介质板叠加形成非线性天线基板,其有效磁导率会随频率的升高成平方的减小,这样就可以在不同的频率上对应同一个贴片尺寸,从而拓展了天线的工作带宽。仿真和样机测试结果表明:该天线辐射单元实现了与弹体的共形,工作带宽31 MHz,弹体轴向-58°^+58°范围内天线轴比小于2,实现了天线的圆极化。

The current missile borne GPS conformal antenna of radio fuze with specific sizes the problem of the narrow-band,a double-layer dielectric plate slotted bomb load broadband conformal antenna with GPS was proposed.The antenna took double-layer dielectric plate as an antenna radiation unit of the substrate,two different dielectric constants of dielectric plate superposition formed nonlinear antenna substrate and its effective permeability would decrease with the frequency increasing.Simulation and prototype test results showed that the antenna radiating element was realized with the missile body.