In this paper, a Global Navigation Satellite System (GNSS) antenna design which prevents low-noise amplifier (LNA) saturation (compression) and intermodulation caused by S-band signals is proposed to improve the reception of GNSS signals. A simulation was conducted to determine which method can more efficiently decrease the S-band signal while maintaining the noise figure and the antenna gain concurrently. Considering the simulation results, an LNA is manufactured and an LNA performance test is conducted. System-level tests are performed to verify the new GNSS antenna function and to assess the performance improvement. The test results showed that the proposed antenna with the new LNA operates robustly without being affected by signals radiated from nearby S-band antennas while also meeting the required specifications.

中文翻译：

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防止由 S 波段信号引起的 LNA 饱和和互调的 GNSS 天线设计

在本文中，提出了一种全球导航卫星系统 (GNSS) 天线设计，该设计可防止低噪声放大器 (LNA) 饱和（压缩）和由 S 波段信号引起的互调，以改善 GNSS 信号的接收。进行了仿真以确定哪种方法可以更有效地降低 S 波段信号，同时保持噪声系数和天线增益。考虑到仿真结果，制造了一个 LNA 并进行了 LNA 性能测试。执行系统级测试以验证新的 GNSS 天线功能并评估性能改进。测试结果表明，建议的带有新 LNA 的天线运行稳健，不受附近 S 波段天线辐射的信号的影响，同时还满足要求的规格。