a first conductive antenna surface; a first filter having a first interface coupled to both the first feed point and the first conductive antenna surface, and having a second interface coupled to the second feed point; wherein the first filter is configured to attenuate far-field signals passing...
COMPACT LOOP ANTENNA FOR NEAR-FIELD AND FAR-FIELD UHF RFID APPLICATIONS A novel type of radio frequency identification (RFID) reader antenna is proposed for mobile ultra-high frequency (UHF) RFID device. By folded-dipole loop structure with parasitic element, a small antenna size of 31 * 31 ...
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]...
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...
Probe Corrected Plane Bi-Polar Near-Field Antenna Measurements This paper introduces a simple transformation algorithm that enables probe-corrected, near-field and far-field data to be obtained from plane bi-polar near... SF Gregson,CG Parini,J Dupuy - European Conference on Antennas & Propagation...
Various mathematical expressions for the far field are substantially simpler than those for the complete radiation field. This also applies to radiation from antennae. Here, it is also of interest that objects in the near field can have a direct back-action on the antenna, while more distant ...
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...
来源会议 Proc. of 20th ESTEC Antenna Workshop on Millimeter Wave Antenna Technology and Antenna Measurement. 1997/06/01 研究点推荐 near-field far-field transformation planar near-field far-field transformation focussing antennas 引用走势 2008 被引量:1 ...
locations near-field to far-field transformation algorithm data points computational complexity probe position errors plane-polar scanning nonrectangular grid/ B5270B Single antennas B5260 Antenna theory B0290F Interpolation and function approximation (numerical analysis) B0290H Linear algebra (numerical ...
Optical near-field excitations on plasmonic nanoparticle-based structures A detailed analysis of micro- and nanoantennas is crucial for enhancing the performance of photodetectors in the mid- and far-infrared (IR) region. In contrast to the rapid progress in IR detectors based on nanodevices, the ...