高功率微波拍波辐射场高精度测量方法

景洪; 郝文析; 刘英君; 宗子健; 杨猛; 蒋自力

doi:10.11884/HPLPB201931.180292

高功率微波拍波辐射场高精度测量方法

doi: 10.11884/HPLPB201931.180292

西北核技术研究所, 西安 710024

详细信息

作者简介:
景洪(1983－), 男，硕士，从事高功率微波测量技术研究；brohong@163.com

中图分类号: TN827
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出版历程
- 收稿日期: 2018-10-29
- 修回日期: 2019-01-21
- 刊出日期: 2019-02-15

Accurate measurement of high power microwave beat-wave radiation

Northwest Institute of Nuclear Technology, Xi'an 710024, China

摘要

摘要: 在进行高功率微波(HPM)拍波辐射场测量时，由于常规测量系统中天线、衰减环节、检波器等器件是按照频率设计和进行指标测试的，当接收包含多个频率分量的拍波信号时，存在着难以判定和选择对应频率点技术指标的难题。并且由于检波器的非线性特性，单一检波器用于拍波信号测量时会产生新的拍频信号，该拍频信号叠加在检波电压包络上，使得检波电压包络振荡起伏，给测量带来较大的测量偏差。为解决上述问题，设计了基于频率分离测量和场强回推叠加的测量方法，可将拍波功率测量不确定度降低到0.3 dB以内，适用于HPM微波拍波辐射场高精度测量场合。
- 高功率微波 /
- 拍波 /
- 辐射场 /
- 检波器
Abstract: The conventional high power microwave (HPM) radiation measurement system often consists of antennas, attenuators, detectors and other components. There will always be parametric selection dilemma when the conventional system is used in HPM beat-wave radiation measurement, because the system is designed and tested on single frequency while beat-wave signal is composed of many frequency components. Furthermore, the utilization of detectors in beat-wave radiation measurement will lead to new beat-wave frequency components due to their nonlinear feature. It is commonly difficult to measure the output waveform accurately when the signal is superimposed with the new beat-wave frequency components. To solve these problems, a new measurement method based on frequency separation and electric field backstepping is proposed. The application of the proposed method is able to effectively reduce uncertainty of beat-wave radiation measurement to less than 0.3 dB, which satisfies the requirement of accurate HPM beat-wave radiation measurement.
- high power microwave /
- beat wave /
- radiation field /
- detector

HTML全文

图 1 拍波辐射场波形及频谱

Figure 1. Waveform and spectrum of typical beat-wave radiation

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图 2 常规的HPM辐射场测量系统

Figure 2. Conventional system for HPM radiation measurement

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图 3 检波器拍波信号典型输出波形和频谱

Figure 3. Waveform and spectrum of output of detector

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图 4 HPM拍波辐射场高精度测量系统

Figure 4. Proposed system for HPM beat-wave radiation accurate measurement.

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图 5 实验场景和测得的拍波波形

Figure 5. Experimental setup and the measured beat-wave waveform

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表 1 检波幅值比较实验结果

Table 1. Experimental results of detector output amplitudes comparison

frequency/GHz	independent amplitude/mV	BV/mV	HBV/mV	V_p/mV
3.3/3.7	21.6/53.6	114.8	77.6	133.6
6.3/6.7	35.6/89.2	132.8	106.4	172.4
9.3/9.7	34.8/84.0	117.2	97.6	156.4

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