CAJ | 학술논문

基于反射法理论提出了一种使用矢量网络分析仪测量集总参数元件阻抗的方法,引入阻抗匹配电路,拓宽了矢量网络分析仪的阻抗测量范围.通过对匹配电路二端口网络模型中参量A的分析,给出相应的被测元件的阻抗计算式,消除了夹具对测量结果的影响.采用矢量网络分析仪直接测量法和该阻抗测量法分别测量了5种不同阻值的金属膜电阻,结果表明,该阻抗测量方法的测量精度高于矢量网络分析仪直接测量的精度,可在30 kHz～100 MHz频率范围内实现几欧至千欧阻抗的精确测量.
기우반사법이론제출료일충사용시량망락분석의측량집총삼수원건조항적방법,인입조항필배전로,탁관료시량망락분석의적조항측량범위.통과대필배전로이단구망락모형중삼량A적분석,급출상응적피측원건적조항계산식,소제료협구대측량결과적영향.채용시량망락분석의직접측량법화해조항측량법분별측량료5충불동조치적금속막전조,결과표명,해조항측량방법적측량정도고우시량망락분석의직접측량적정도,가재30 kHz～100 MHz빈솔범위내실현궤구지천구조항적정학측량.
Based on the reflection method theory,a method to measure impedance of lumped elements using a vector network analyzer (VNA) is presented. An impedance matching circuit is introduced to extend the impedance measurement range of VNA. The mathematic expression for calculating the impedance of a device under test (DUT) is obtained by analyzing 'A' parameter of two port network model in the circuit, and the influence from the jig is eliminated. Five types of metal film resistors, which are classified by their resistance, are tested by both direct measurement using a VNA and the method presented. The results show that this method has higher accuracy than the direct measurement method and can accurately determine the impedance from several ohms to thousand ohms in the frequency range of 30 kHz to 100 MHz.