A novel dual-band electronically beam scanning antenna based on a slot active frequency-selective surface (SAFSS) is proposed in this article. Each unit cell used in an SAFSS screen has two slots with four variable capacitors utilized to achieve high tuning ranges and dual modes. To achieve an adequate single mode, specific capacitances are used in each slot to overlap the two resonances. These dual modes in each unit cell create specific conditions for an antenna to control beams in dual bands simultaneously. An antenna prototype operating at the 1.5- and 2.45-GHz frequency bands is fabricated and measured. The results show that the fabricated antenna can scan its main beam in the dual band across the entire azimuth plane with a 45° resolution. The designed dual-band antenna is inexpensive, has easy fabrication, and is capable of sweeping beams across the full 360? angular range in dual bands simultaneously.

中文翻译：

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一种基于缝隙有源选频表面的新型双频波束扫描天线【天线应用专区】


本文提出了一种基于缝隙有源选频表面（SAFSS）的新型双频段电子波束扫描天线。 SAFSS 屏幕中使用的每个单元都有两个插槽，其中有四个可变电容器，用于实现高调谐范围和双模式。为了实现足够的单模，在每个槽中使用特定电容来重叠两个谐振。每个单元中的这些双模式为天线同时控制双频段波束创造了特定条件。制作并测量了工作在 1.5 GHz 和 2.45 GHz 频段的天线原型。结果表明，所制作的天线可以在整个方位角平面上以 45° 分辨率在双频段中扫描主波束。设计的双频天线价格便宜，易于制造，并且能够在全 360° 范围内扫描波束？同时在双波段的角度范围。