本文中给出了一款新型圆筒形双频带天线。
本文以阶梯阻抗双频带通滤波器的综合与设计为主，并研究了与之相关的理论和技术。
In this thesis, the related theories and technologies of the step-impedance dual-band bandpass filter are studied mainly, with an emphasis on the synthesis and design of this filter.
该规律能全面描述机床双频颤振现象和颤振过程主频带移动的原因。
It can explain the double frequency chatter and the change of superior frequency in chattering process.
最后，提出了一种新型宽频带双频差分天线。
At last, a novel broadband differential dual-frequency antenna is designed, simulated and measured.
本文对微带天线双频、圆极化、高增益、宽频带和宽波束技术作了一定的研究。
In this paper, technologies of dual-band, circular polarization, high gain, broadband and wide-beam have been studied.
本文对微带天线双频、圆极化、高增益、宽频带和宽波束技术作了一定的研究。
In this paper, technologies of dual-band, circular polarization, high gain, broadband and wide-beam have been studied.
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