Characterizing the angular radiation behavior of installed millimeter-wave (mmWave) radar modules is increasingly important in practical sensing platforms, where packaging, mounting hardware, and nearby structures can significantly alter the effective emission profile. However, once a device is embedded in its host environment, conventional chamber- and turntable-based antenna measurements are often impractical. This paper presents a hemispherical angular received-power mapping methodology for in-situ EM validation of installed mmWave modules under realistic deployment constraints. The approach samples the accessible half-space around a stationary device-under-test by placing a calibrated receiving probe at prescribed (phi, theta, r) locations using geometry-consistent positioning and quasi-static acquisition. Amplitude-only received-power is recorded using standard RF instrumentation to generate hemispherical angular power maps that capture installation-dependent radiation characteristics. Proof-of-concept measurements on a 60-GHz radar module demonstrate repeatable hemi-spherical mapping with angular trends in good agreement with full-wave simulation, supporting practical on-site characterization of embedded mmWave transmitters.

翻译：在实际感知平台中，已安装毫米波雷达模块的角辐射特性表征日益重要，因为封装、安装硬件及邻近结构会显著改变有效发射剖面。然而，当设备嵌入宿主环境后，传统的基于暗室和转台的天线测量方法往往难以实施。本文提出一种半球角接收功率映射方法，用于在现实部署约束下对已安装毫米波模块进行原位电磁验证。该方法通过几何一致性定位和准静态采集，将校准接收探头置于预设的（φ, θ, r）位置，对静止被测设备周围可访问半空间进行采样。利用标准射频仪器记录仅幅度接收功率，生成捕获安装相关辐射特性的半球角功率图。在60 GHz雷达模块上的概念验证测量表明，该方法可实现可重复的半球映射，其角向趋势与全波仿真结果高度吻合，为嵌入式毫米波发射机的现场表征提供了实用技术支持。