改进AD8361“trupwr”射频检测器IC的线性度

N. Greenough
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引用次数: 0

摘要

AD8361是一款宽带线性RMS射频(RF)检测IC,广泛应用于射频行业。本文提出了一种将检测器的动态范围扩展到近40分贝的方法,在小于- 30dBm到+8dBm的范围内,绝对精度通常为+0.5/ - 1dB。此外,大多数样品可以在更宽的范围内跟踪到非常高的程度。精度和跟踪的提高允许改进功率校准,实时功率调节和VSWR(电压驻波比)的计算,用于PPPL NSTX上加热等离子体的多兆瓦射频发射器。本文提出的方法比厂家提出的双探测器-放大器技术更简单,成本更低。给出了PPPL制造的大约20个双探测器模块样本的测试结果和分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improving the linearity of the AD8361 “Tru-Pwr” RF detector IC
The AD8361 is a wideband linear RMS radio-frequency (RF) detector IC widely used in the RF industry. This paper presents a method to extend the dynamic range of the detector to nearly 40 decibels, over a range from less than −30dBm to +8dBm with absolute accuracy typically +0.5/−1dB. In addition, most samples can be made to track to a very high degree over an even wider range. The increase in accuracy and tracking allows improved power calibration, real-time power regulation, and calculation of VSWR (voltage standing wave ratio) for the multimegawatt RF transmitters used to heat plasmas on NSTX at PPPL. The method presented here is simpler and lower cost than the dual-detector-amplifier technique presented by its manufacturer. Test results and distributions are presented for approximately 20 samples of a dual-detector module built by PPPL.
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