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表面波等离子体天线因存在很强的电磁干扰而导致电磁兼容性较差,必须采用相应的技术手段或利用新型电源作为天线激励源以满足天线的电磁兼容性要求。为此,采用5～20kHz高压交流电源作为激励源构建了10kHz交流等离子体天线,并分析了其辐射特性和电磁兼容性。研究结果表明,在较宽的频带范围内,该10kHz交流等离子体天线的电压驻波比(VSWR)<2;同50Hz交流等离子体天线相比,该天线的噪声明显减小,且天线的增益在150～350MHz频带范围内有所提高;使用该天线接收无线广播时收音机可以接收到广播电台信号,而表面波等离子体天线则会因过强的干扰而导致收音机不能正常工作。该10kHz交流等离子体天线不仅在带宽特性上有所改观,而且同表面波等离子体天线相比具有较低的电磁干扰。
Due to the existence of strong electromagnetic interference, the surface plasmon plasma antenna has poor electromagnetic compatibility. Corresponding technical means or new power source must be used as the antenna excitation source to meet the electromagnetic compatibility requirements of the antenna. Therefore, a 10kHz AC plasma antenna with 5 ~ 20kHz high-voltage ac power as excitation source was constructed and its radiation characteristics and electromagnetic compatibility were analyzed. The results show that the voltage standing wave ratio (VSWR) of the 10 kHz AC plasma antenna is less than 2 over a wide frequency band. Compared with the 50 Hz AC plasma antenna, the noise of the antenna is significantly reduced, and the gain of the antenna In the 150 ~ 350MHz band range has improved; the use of the antenna to receive radio broadcast radio signals can be received, and the surface wave plasma antenna will be too strong interference caused by the radio does not work properly. The 10kHz AC plasma antenna not only improves the bandwidth characteristics, but also has lower electromagnetic interference than the surface wave plasma antenna.