Design Optimization for N-port RF Network Reflectometers under Noise and Gain Imperfections

Muslum Emir Avci, S. Ozev
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引用次数: 1

Abstract

RF sensor technology in mm-wave range has improved significantly in recent years, which led to its widespread use in mission-critical systems, such as automotive radar. With the advent of multi-antenna systems, cascaded radar designs has gained prominence to increase resolution in terms of distance, speed, and angle. However, the performance of the radar systems can be highly dependent on dynamic conditions and they may require in-field calibration, specifically in terms of magnitude and phase mismatches of gain and input reflection coefficient. While in-field measurement of gain using built-in power sensors is more or less straightforward, measurement of the reflection coefficient requires the implementation of an N-port reflectometer on the chip. In this paper, we present an analytical model for noise and gain imperfections in N-port network analyzers. Based on this model, we propose a methodology for optimizing the design of the N-port reflectometer to obtain the highest accuracy under given realistic constraints, such as coupler gain/loss, splitter loss, power detector non-idealities, and noise.
噪声和增益缺陷下n口射频网络反射计的设计优化
近年来,毫米波范围内的射频传感器技术有了显著的进步,在汽车雷达等关键任务系统中得到了广泛的应用。随着多天线系统的出现,级联雷达设计在距离、速度和角度方面的分辨率得到了显著提高。然而,雷达系统的性能可能高度依赖于动态条件,它们可能需要现场校准,特别是在增益和输入反射系数的幅度和相位不匹配方面。虽然使用内置功率传感器进行增益的现场测量或多或少是直接的,但反射系数的测量需要在芯片上实现n端口反射计。在本文中,我们提出了n端口网络分析仪的噪声和增益缺陷的分析模型。基于该模型,我们提出了一种优化n端口反射计设计的方法,以在给定的现实约束下获得最高的精度,例如耦合器增益/损耗、分频器损耗、功率检测器非理想性和噪声。
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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