请输入您要查询的字词:

 

单词 passive device
释义 passive device
1 An electronic component, such as a capacitor or resistor, that is incapable of amplification.
2 An artificial satellite that reflects an incoming signal without amplification.
3 A solar-power device that makes use of an existing structure to collect and utilize solar energy without the use of pumps, fans, etc.
4 A radar device that provides information for navigation, guidance, surveillance, etc., by receiving the microwave radiation. Such a passive device emits no microwave energy itself and therefore does not disclose its position.
5 A system that detects an object by the radiation that it emits, rather than by reflecting radiation off it, as in a passive infrared detector (PIR detector ). Compare active device.
随便看

 

物理辞典收录了3346条物理词条,基本涵盖了常用物理知识及物理英语单词词组的翻译及用法,是物理学习的有利工具。

 

Copyright © 2000-2023 Newdu.com.com All Rights Reserved
更新时间:2025/6/23 3:25:12