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本文探讨了模拟目标天线阵列的设计问题。对接收天线而言,实际目标基本上是平面波。要在实验室有限空间内用三元天线阵列模拟目标,就得承受一定的幅度和相位不均匀性。我们按照1分贝幅度不均匀性和λ/20.5相位不均匀性条件,推导了三元阵列的设计公式。此外还讨论了与三元阵列设计有关的近场效应误差计算及校正,并因之而使设计尺寸限制可适当放宽等问题。
This article explores the design of analog target antenna arrays. The actual target for a receiving antenna is basically a plane wave. To simulate a target with a ternary antenna array in a limited space in a lab, you have to suffer some amplitude and phase nonuniformity. We follow the 1-dB amplitude inhomogeneity and the λ / 20.5 phase inhomogeneity conditions, derived ternary array design formula. In addition, the calculation and correction of the near-field effect errors related to the ternary array design are also discussed. As a result, the design size limit can be appropriately relaxed.