Low-cost Automatic Antenna Polarization Measurement system

2022 Research, Invention, and Innovation Congress: Innovative Electricals and Electronics (RI2C) Pub Date : 2022-08-04 DOI:10.1109/RI2C56397.2022.9910296

Natdanai Phumirin, Kitiphon Sukpreecha, K. Phaebua, A. Boonpoonga, T. Lertwiriyaprapa

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Abstract

This paper presents low-cost automatic antenna polarization measurement system. The portable vector network analyzer (VNA) namely nanoVNA is employed instead of an expensive high-precision laboratory VNA. NanoVNA supports frequency range of 50 kHz to 1.5 GHz that provide a good capability to measure an electrical characteristics of antennas, filters, duplexers, amplifiers and etc. The wide-band Vivaldi antenna is employed as the measurement electric field probe which is supported by the rotating shaft and drive by stepping motor. MALAB GUI post-processing is implemented to automatically control the stepping motor and NanoVNA. The orthogonal components of probe amplitudes and phases of antenna under test (AUT) are measured by NanoVNA. The axial-ratio value of AUT polarization can be obtained by MALAB post processing. Therefore, the proposed low-cost automatic antenna polarization measurement system is well suited to understand antenna polarization with hands-on experience.

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低成本自动天线极化测量系统

介绍了一种低成本的天线极化自动测量系统。采用便携式矢量网络分析仪(即纳米矢量网络分析仪)代替昂贵的高精度实验室矢量网络分析仪。NanoVNA支持50 kHz至1.5 GHz的频率范围，为测量天线、滤波器、双工器、放大器等的电气特性提供了良好的能力。采用宽带维瓦尔第天线作为测量电场探头，由转轴支撑，步进电机驱动。实现了MALAB GUI后处理，自动控制步进电机和NanoVNA。利用NanoVNA测量了被测天线的探头幅值与相位的正交分量。通过MALAB后处理可以得到AUT偏振轴比值。因此，本文提出的低成本天线极化自动测量系统非常适合通过实际操作来了解天线极化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 Research, Invention, and Innovation Congress: Innovative Electricals and Electronics (RI2C)

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