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提出了双天线激励混响室的方法,研究了双天线激励对混响室场性能的影响。分析了双天线改善混响室场均匀性的原理,对单天线激励下的混响室模型以及处于不同位置的双天线激励下的混响室模型进行了仿真计算,从场均匀性和场强两个方面研究了双天线对混响室场性能的影响,对双天线影响场强的机理进行了分析。研究表明:采用双天线激励改善了混响室工作区域的场均匀性;采用双天线可以降低对功率放大器的要求,降低大型混响室测试成本。最后对双发射天线在大型混响室中的应用进行了探讨和展望。
The method of dual-antenna excitation reverberation chamber is proposed, and the influence of dual-antenna excitation on the performance of reverberation chamber is studied. The principle of dual antenna to improve the uniformity of the reverberation chamber is analyzed. The reverberation chamber model under the single antenna excitation and the reverberation chamber model under the dual antenna excitation in different positions are simulated. The field uniformity and field strength The influence of dual antenna on the performance of reverberation chamber was studied in two aspects. The mechanism of double antenna affecting field strength was analyzed. The research shows that the dual-antenna excitation can improve the field uniformity of the reverberation chamber. The dual antenna can reduce the requirement for the power amplifier and reduce the testing cost of the large reverberation chamber. Finally, the application of dual transmit antennas in large reverberation chambers is discussed and prospected.