The far field of an antenna is generally considered to be the region where the outgoing wavefront is planar and the antenna radiation pattern has a polar variation and is independent of the distance from the antenna. Hence, to generate a locally plane wave in the far field the radial ...
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far field cassegrainian antenna 【电】 远场凯氏天线相关短语 external phasing (天线) 外部定相 masthead mounted (雷达收发机装于雷达天线架上) 桅装 isotron (高压电场) 同位素分离器 telemetering link(无线电) 遥测线路 unmodulated noise (无线电) 未调制噪音 junction box (使馈电线与配电干线相联的) 汇...
In this paper we report some results on the estimation of the far-field of an antenna by using a low-cost amplitude-only near-field measurement setup. A simple experimental setup is used to measure the intensity of the near-field of the antenna under test on two planes. The measured inten...
A method of forming the far-field beam pattern of an antenna at short ranges is disclosed. More specifically, the antenna beam pattern is rotated through a rotational angle about the line-of-sight of a source of radar signalling located at a near-field range away from the antenna. ...
far-field-cassegrainian-antenna网络远场凯氏天线 网络释义 1. 远场凯氏天线 ... antenna field 天线场 far field cassegrainian antenna 远场凯氏天线 near field Casegrainian antenna 近场卡士格然天线 ... zh-tw.w3dictionary.org|基于3个网页©...
a既可以在快餐店吃又可以带回家吃 Both may eat in the fast-food restaurant and may bring back to the family to eat[translate] ain the ‘near field’ of the antenna. How far does the near field extend? 在`在领域’的天线附近。 多远近的领域延伸?[translate]...
farfield A far distance. It typically refers to the propagation of electromagnetic waves over long distances. Depending on the application, farfield may be contrasted with "nearfield" (short range) or with "midfield" (in between). Seenearfield. ...
文档标签: near and far field 系统标签: field far near antenna boundary impedance .ednmagAugust16,2001|edn95 HOWDOWEDEFINETHEFARFIELDOFANANTENNA SYSTEM,ANDWHATCRITERIADEFINETHEBOUNDARY BETWEENITANDTHENEARFIELD?THEANSWERDEPENDS ONYOURPERSPECTIVEANDYOURDESIGN’STOLERANCES. S everalengineers,includingmyself...
Provided is a portable transport apparatus having an enclosure for containing an item to be transported, a RFID reader connected to a near field antenna disposed within the enclosure for a first RFID reading of an area inside the enclosu... Satya SHARMA,Akshay ATHALYE 被引量: 1发表: 2015年 ...