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本文叙述一种简单的、电的零点控制天线。这种天线是四元环阵,其半径甚小,为0.04λ。因此,整个天线可以装进一个薄的圆筒或舰用的“鞭状”结构内。天线方向图可以提供单向零点的全向复盖,此零点可用一个移相器在360°方位内电控。这种天线方向图既适用于手控零点定位又适用于电控零点定位。由于半径小,与半径较大的环形阵天线相比,增益和带宽性能有某些降低。
This article describes a simple, electrical zero-control antenna. This antenna is a four-element ring array with a very small radius of 0.04λ. Therefore, the entire antenna can fit into a thin cylinder or ship’s “whip” structure. Antenna pattern can provide omnidirectional coverage of unidirectional null, which can be electronically controlled within 360 ° using a phase shifter. This antenna pattern is suitable for both manual zero positioning and electronic control zero positioning. Due to the small radius, there is some degradation in gain and bandwidth performance compared to a larger radius circular array antenna.