加袖后的分形天线可有效地改善天线的高频端特性，袖长和袖间距对高频特性有较强的调节作用。
The sleeves can effectively improve the performance of the fractal antenna at high resonant frequency. That is, its space and its height have excellent ability to tune at high resonant frequency.
正因为这样，才使SAW滤波器在电子信息领域中得到了越来越广泛的应用，特别是应用于高频端rf射频信号滤波。
Because of these, SAW Filter is more and more comprehensively applied in electronic information field, especially in RF signal processing field.
设计了一种以电流型PWM控制器UC3842芯片为核心的高频单端反激式开关稳压电源。
A high frequency single-ended flyback switching power supply is designed with current-mode PWM controller UC3842 chip as its core.
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