Precision Microwave Attenuation Measurement by Time Interval Ratio

机译：用时间间隔比测量精密微波衰减

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摘要

A method of measuring microwave attenuation by substitution is described. As attenuation is inserted into the device under test, the pulse repetition frequency of a pulse modulated PIN diode switch in series with the device is changed to maintain a constant mean power output from the circuit. The ratio of the pulse repetition frequencies before and after insertion is shown to be simply related to the attenuation of the device under test. Sources of error are examined in detail and results are quoted showing inaccuracies of less than + or - 0.002 dB over a range of 0 to 20 dB. (Author)

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作者
Cummings, P.; Johnson, R. H.;
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年度 1985
页码 p.1-44
总页数 44
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Microwaves; Attenuation; Measurement; Constants; Errors; Frequency; Mean; Output; Power; Precision; Pulse rate; Ratios; Repetition rate; Sources; Time intervals;

机译：微波;衰减;测量;常数;误差;频率;平均值;输出;功率;精度;脉冲率;比率;重复率;源;时间间隔;

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2. Precision microwave measurement of the 2(3)P(1)-2(3)P(0) interval in atomic helium [J] . Storry CH., Hessels EA. Physical Review, A. Atomic, molecular, and optical physics . 1998,第1期

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3. Precision Errors, Least Significant Change, and Monitoring Time Interval in Pediatric Measurements of Bone Mineral Density, Body Composition, and Mechanostat Parameters by GE Lunar Prodigy [J] . JaworskiM., PludowskiP. Journal of clinical densitometry . 2013,第4期

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4. A Dual Channel AF Substitution Microwave Attenuation Measurement System for Precision Attenuator Calibration [C] . Thomas Y. Wu, Yue Yan Shan, Sze Wey Chua NCSL International Workshop Symposium . 2007

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5. Understanding sources and timescales of melt generation in continental rear arcs using high-precision measurements of uranium and thorium isotopes in lavas from Reventador volcano, Ecuador. [D] . Matthews, Timothy P. 2012

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6. Effects of recording speed on precision of time-based polycardiographic measurements. Optimal paper speeds for measuring points and intervals. [O] . D H Spodick, H G Ball, V M Pigott 1978

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7. Effects of recording speed on precision of time-based polycardiographic measurements. Optimal paper speeds for measuring points and intervals. [O] . Spodick, D H, Ball, H G, Pigott, V M 1978

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Precision Microwave Attenuation Measurement by Time Interval Ratio

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