对小米8GNSS天线性能进行全面分析
Mónica Zabala Haro1,2, Ángel Martín Furones1, Ana Anquela Julián1
1Department of Cartographic, Geodesy and Photogrammetry Engineering, Higher Technical School of Geodetic, Cartographic and Topographical Engineering, Universitat Politècnica de València, Campus de Vera s/n, 46022 Valencia, Spain.
Sensors (Basel, Switzerland)
|April 27, 2024
概括
小米米8小米8
科学领域:
- * 全球卫星导航系统 (GNSS) 技术
- * 移动设备天线工程 移动设备天线工程
- * 无线电频率 (RF) 信号分析
背景情况:
- * 对基于智能手机的精确点定位 (PPP) 越来越感兴趣.
- * 在智能手机中引入双频 (L1/L5) 全球导航卫星系统 (GNSS) 接收器.
- *智能手机GNSS天线的挑战:低成本,多路径灵敏度和物理限制.
研究的目的:
- * 确定智能手机中的GNSS天线的机械位置.
- * 评估天线性能,包括辐射模式.
- *在各种条件下评估信号接收和卫星可见性.
主要方法:
- *使用矢量网络分析仪 (VNA) 和机器人定位进行无声室测量.
- *用于天线特征的高度和 azimuth 角度的变化.
- *户外测试以评估接收功率和卫星可见性.
主要成果:
- * 平面反转F天线 (PIFA) 具有全向辐射模式,没有增益.
- *L1/E1/B1和L5/E5a/B2a天线位于屏幕顶面 (48 × 17毫米和60 × 13毫米).
- *当屏幕面向天空时,优异的L5卫星信号噪声比 (SNR);在背面的PPP中,数据损失很大 (99%).
- *L1天线的功率比建议低25%,在多路径环境中对弱信号具有高度敏感性.
结论:
- *智能手机GNSS天线的性能受到导向和环境因素的重大影响.
- *双频功能在晴朗的天空条件下增强信号接收,特别是L5.
- * L1天线的设计表明在具有挑战性的多路径场景中,功耗和灵敏度之间的权衡.
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