In this work, a gain-enhanced Vivaldi antenna is proposed, which is integrated with the transceiver on a printed circuit board. The gain and the radiation pattern are improved with the addition of the optimization strips in front of the flare without extending the antenna width. Finally, conventional and gain-enhanced Vivaldi antennas are fabricated and applied to the through-wall radar(TWR) system. According to the measurement results, the gain of the proposed antenna is 3 dB higher than that of the conventional antenna in the operating frequency range from 4 to 6 GHz. Meanwhile, the gain fluctuation is more stable and the beamwidth is narrower. The testing results of different scenarios illustrate that the TWR with the gain-enhanced antenna possessed farther detection distance and higher angular resolution compared with the system using a conventional antenna. The characteristics of the high integration and miniaturization make the TWR system suitable for individuals in handheld or wearable applications.

中文翻译：

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带有增益增强型 Vivaldi 天线的手持式纳米穿墙雷达定位

在这项工作中，提出了一种增益增强的 Vivaldi 天线，它与收发器集成在印刷电路板上。增益和辐射方向图通过在耀斑前面添加优化条带而得到改善，而无需扩展天线宽度。最后，制造常规和增益增强的 Vivaldi 天线并将其应用于穿墙雷达 (TWR) 系统。根据测量结果，在 4 至 6 GHz 的工作频率范围内，该天线的增益比传统天线高 3 dB。同时，增益波动更稳定，波束宽度更窄。不同场景的测试结果表明，与使用传统天线的系统相比，使用增益增强天线的TWR具有更远的检测距离和更高的角分辨率。高集成度和小型化的特点使得行波系统适合个人手持或可穿戴应用。