从不同结构的超宽带平面单极子天线实现频带抑制的方法出发，研究实现频带抑制的基本原理和常用方法。
In this paper, through approach of various band-rejected UWB planar monopole antennas, principles and methods are researched.
基于周期性槽孔结构的空间谐波的分析，讨论了抑制高次谐波以拓展使用频带的方法。
Based on the analysis of spatial harmonics of periodically slotted structure the method for extending operation frequency-band through suppressing higher-order harmonics is discussed.
提出了利用混沌算法抑制噪声，采用新型窄频带超声检漏原理来进行泄漏检测的新方法。
Chaos arithmetic is used for reducing noise in leaking system, and a new kind of narrow band ultrasonic testing principle is introduced.
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