The paper presents a 1 × 2 B-shaped antenna array for dual-band operation at 4 and 8 GHz. The antenna design consists of a rectangular patch with two annular-strip lines fabricated on the top layer and finite ground plane on the bottom layer. The array is formed by designing an optimum T-shaped microstrip line for impedance matching. The dimensions of the antenna array are 78 × 36 × 1.6 mm3. Full-wave simulations have been conducted and the measured results are in good consent with the simulated results. The measured impedance bandwidth (reference −10 dB) has been observed at 3.84–4.16 and 7.78–8.38 GHz. Measured peak gain and radiation efficiency at 4 and 8 GHz are 8.3, 9.4 dB and 82.5 and 81.2%, respectively.

中文翻译：

---

用于卫星应用的双频 B 形天线阵列

本文介绍了一种 1 × 2 B 形天线阵列，用于在 4 GHz 和 8 GHz 下进行双频操作。天线设计包括一个矩形贴片，顶层有两条环形带状线，底层有有限的接地平面。该阵列是通过设计一条用于阻抗匹配的最佳T形微带线形成的。天线阵列的尺寸为 78 × 36 × 1.6 mm3. 已经进行了全波模拟，测量结果与模拟结果非常吻合。在 3.84–4.16 和 7.78–8.38 GHz 观察到测量的阻抗带宽（参考 -10 dB）。在 4 GHz 和 8 GHz 处测得的峰值增益和辐射效率分别为 8.3、9.4 dB 和 82.5 和 81.2%。