无源天线

1
[电讯] passive antenna
... passivation etching钝化层腐蚀 passive antenna无源天线 passive basic无源元件 ...
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parasitic antenna
... parasite 寄生物反射器寄生振荡 parasitic antenna 无源天线 parasitic capacitance 寄生电容 ...
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passive aerial
无源天线

短语

1
本文基于棱镜折射原理，提出一种用来放大相控阵天线扫描角的无源透镜。
A passive lens based on the prismatic refraction principle proposed to amplify the scan Angle of a phased array.
2
本文所介绍的天线有别于一般的侦察雷达，是一种无源的接收目标雷达信号的天线接收系统。
The antenna introduced in this paper is different from the ordinary reconnaissance radar, which is a passive antenna receptive system receiving target radar signals.
3
本文的主要任务是针对提高毫米波无源成像系统的分辨率和减小成像时间而设计一个多波束透镜天线。
Main task of this dissertation is designing a multi-beam lens antenna to both improve the resolution and reduce the imaging time of the passive millimeter-wave imaging system.

无源天线
无源天线（passive antenna）是指不带任何有源器件的天线。无源天线：是一个金属体，是平常看到很普通的各种天线。有源天线：是在这普通的天线后加放大器，提高灵敏度，降低信噪比。收音机一般不适合有源天线，否则因灵敏度过高易混台，还容易引起正回授发生啸叫。电视用有源天线时，适合单频道远程接收，天线需用七单元折合振子天线，加三级放大，实验证明，在武汉六楼可收到湖北孝感电视台、云梦台、蔡甸台等。

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