In this work, a beam-steering array antenna with the aim of pattern stabilization is presented. The antenna element consists of three-layer and a unique structure of the metalized via hole. It is capable to cover the frequency range from 20.5 to 30 GHz and a stable pattern over thorough operation frequencies. Moreover, the element has a constant gain with the peak of 9.5dBi. Additionally, the proposed modified Butler matrix consists of two 90-degree and two 135-degree couplers without phase shifting section to attain a pattern stabilized beam-steering array antenna. The proposed Butler matrix manages patterns in a constant phase over a frequency from 21 to 29 GHz with the phase error less than ±6°. The integration proposed element and feed network lead to a beam-tilting array antenna which can manage its patterns via input ports and maintain direction by frequencies variation range between 21.1 and 28.8 GHz.

在这项工作中，提出了一种以方向图稳定为目标的波束控制阵列天线。天线元件由三层且独特的金属化通孔结构组成。它能够覆盖20.5至30 GHz的频率范围，并在完整的工作频率上具有稳定的模式。此外，该元件具有恒定增益，峰值为9.5dBi。另外，提出的改进的巴特勒矩阵包括两个不带相移部分的90度和135度耦合器，以实现方向图稳定的波束控制阵列天线。所提出的巴特勒矩阵在21至29 GHz的频率上以恒定相位管理模式，相位误差小于±6°。