一种宽带低剖面高增益低副瓣定向平板天线北大核心CSCD

研究设计了一款低剖面、宽带、高增益、低副瓣的定向平板天线。为了实现低剖面,采用了宽带微带天线单元、馈电网络等设计,定向天线整体采用印制板;为了实现低副瓣,采用阵列天线与馈电网络的一体化设计,用多层印制板加工技术实现天线单元间不等幅度的馈电精度,尽可能减少人工装配步骤,以降低装配误差。文中对设计的低副瓣定向天线进行了加工测试。测试结果表明,所研制天线的阻抗带宽为26.1%。在阻抗带宽范围内,可以实现最大增益大于23.6 dBi、E面和H面的副瓣电平分别小于-27.4 dB和-28.3 dB、前后比小于-42.2 dB。

A Broadband Low-Profile High-Gain Low-SidelobeDirectional Planar Antenna

This paper describes a low profile, broadband, high gain and low sidelobe directional planar antenna. Torealize the low profile, the printed circuit board (PCB) technology is adopted in the design process of the directional antenna,such as broadband microstrip antenna unit and feed network. To achieve the low sidelobe, array feed network integrateddesign is used in the design process of the directional antenna. To reduce the manual assembly steps and errors, multi-layerPCB processing is applied to ensure the precision of the unequal feeding amplitude among the antenna units. An antenna prototypeis fabricated and exemplified to validate the proposed concept. Measured results show that the designed antenna achievesan impedance bandwidth of 26. 1%. Further, a measured maximum boresight gain up to 23. 6 dBi is obtained. Thesidelobe levels of E-plane and H-plane are smaller than -27. 4 dB and -28. 3 dB, respectively. The front-to-back ratio issmaller than -42. 2 dB within the bandwidth range.