基于有源匹配技术的EMC测试天线设计与实现

doi:10.16180/j.cnki.issn1007-7820.2024.09.011

Abstract

Abstract:

In low frequency band, miniaturized EMC(Electromagnetic Compatibility) test antennas are mostly electrically small antennas, which have the problems of high antenna factor and low test sensitivity. To solve the problem, based on active matching technology, the electrically small antennas loaded with negative impedance converter circuit and field effect transistor high-impedance input circuit are simulated and analyzed respectively. The simulation results show that the field effect transistor high-impedance input circuit has advantages over the negative impedance converter circuit in the ability of reducing antenna factor and the stability of circuit, and is helpful to the design and implementation of miniaturized EMC test antenna. The test results of the miniaturized EMC test antenna loaded with field effect transistor high-impedance input matching circuit show that, in 2~30 MHz, antenna factor can be improved by 22~46 dB compared with the EMC test antenna without matching circuit.

Key words: active matching, antenna factor, EMC test antenna, electrically small antenna, negative impedance converter circuit, field effect transistor, circuit simulation, calibration of antenna factor

CLC Number:

TN82

CHEN Jiaxing, ZHANG Xinlin, JIANG Bo, ZHANG Jiahai, HUANG Xing, QIN Yangzhen, LU Hongmin. Design and Implementation of EMC Test Antenna Based on Active Matching Technology[J].Electronic Science and Technology, 2024, 37(9): 72-78.

Figures/Tables 13

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频率 /MHz	天线系数/dB·m^-1
频率 /MHz	C_t=8.7 pF	C_t=9.0 pF	C_t=9.27 pF
2	26.8	21.6	12.0
6	17.5	12.7	6.6
10	13.9	10.1	7.1
14	11.7	9.0	7.3
18	10.5	8.5	7.4
22	9.7	8.2	7.4
26	9.2	8.0	7.4
30	8.8	7.9	7.4

Design and Implementation of EMC Test Antenna Based on Active Matching Technology

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