一种超宽带高增益的透镜喇叭天线的设计

该文提出了一种适用于微波通讯系统的超宽带(UWB)高增益透镜喇叭天线。该天线由一个E面喇叭天线,一个球面介质透镜和双楔形金属脊构成,并由同轴线馈电及采用HFSS软件仿真。仿真结果表明,双楔形金属脊可有效增加喇叭天线的带宽,有效频率带宽达到2～12 GHz。当仅使用双金属脊来改善喇叭天线的性能时,喇叭天线的增益会下降。文中使用一种球面介质透镜来补偿双金属脊对喇叭天线增益的负面影响。仿真结果表明,该透镜可有效提高喇叭天线在工作频带内的增益。采用透镜和金属脊结构后,该喇叭天线拥有超宽带,高增益和较强的定向辐射性能,可以应用于各类通信系统中。

Design of an Ultra Wideband and High Gain Horn Antenna With Lens

In this paper, an ultra wideband (UWB) and high gain horn antenna with lens is proposed for microwave communication system, which is composed of E plane horn antenna, a dielectric spherical lens and double wedge metal ridge. The proposed antenna is fed by coaxial feed, which is simulated by high frequency structure simulator (HFSS) software. The simulation results show that the double wedge metal ridge can effectively increase the bandwidth of the horn antenna, and the effective frequency bandwidth reaches 2~12 GHz. When only the double metal ridge is used to improve the performance of the horn antenna, the gain of the horn antenna will decrease. In this work, a spherical dielectric lens is used to compensate for the negative effects of double wedge metal ridge on the horn antenna gain. According to the simulated results, the dielectric lens can effectively improve the gain of the horn antenna in the working frequency band. With the proposed lens and a metal ridge structure, the horn antenna has ultra wideband, high gain and strong directional radiation performance, which can be applied to various communication systems.