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Planar 2D Beam Steering Antenna Using Liquid Metal Parasitics
IEEE Transactions on Antennas and Propagation ( IF 5.7 ) Pub Date : 2020-11-01 , DOI: 10.1109/tap.2020.2998219
Vivek T. Bharambe , Jacob J. Adams

We demonstrate a single-feed planar antenna capable of 2-D beam-steering using pumped liquid metal (LM) parasitics. Instead of relying on phase shifters for beam-steering, the proposed antenna employs LM plugs acting as parasitic elements to achieve up to ±48° steering in the H-plane and ±54° steering in the E-plane. The antenna can also steer in diagonal and OFF-diagonal planes using a combination of the E and H plane steering techniques. Simultaneously, the antenna maintains a 2:1 VSWR for all the states. By creating a composite realized gain plot for all these states, it is seen that the antenna can cover as much as 23% of the spherical area with at least 5 dBi of realized gain, compared to 4.5% in the absence of LM parasitic elements for beam-steering. We also quantify the pattern diversity (PD) and illustrate that the antenna achieves a greater PD than an electrically scanned $2 \times 2$ phased array occupying an equivalent aperture ( $0.55\lambda _{0} \times 0.66\lambda _{0}$ ).

中文翻译:

使用液态金属寄生的平面二维波束控制天线

我们展示了一种能够使用泵送液态金属 (LM) 寄生进行二维波束控制的单馈平面天线。所提出的天线不是依靠移相器进行波束控制,而是采用 LM 插头作为寄生元件来实现 H 平面中高达 ±48° 的转向和 E 平面中 ±54° 的转向。天线还可以使用 E 和 H 平面转向技术的组合在对角线和非对角线平面进行转向。同时,天线在所有状态下保持 2:1 VSWR。通过为所有这些状态创建复合实现增益图,可以看出天线可以覆盖多达 23% 的球形区域,实现增益至少为 5 dBi,而在没有 LM 寄生元件的情况下,实现增益为 4.5%。波束控制。 $2 \times 2$ 相控阵占据等效孔径( $0.55\lambda _{0} \times 0.66\lambda _{0}$ )。
更新日期:2020-11-01
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