VLF superdirective loop array

Journal of Research of the National Bureau of Standards, Section D: Radio Propagation Pub Date : 1963-09-01 DOI:10.6028/JRES.067D.059

E. Seeley

引用次数: 2

Abstract

SUjwrclirl'ctil·it.v may be ach iC'vecl with sho rt VLF loop arrays bC'cause thl' bramlyidth d<'pcnds on l ~ ' upon the numbe r of loops and not the length of the ar ray. In a ddition the usual factors limiting s lIpel'dircctivity a rc not so prevall'l)\' due to tl1(' (Ircoupl ing b('( I\'rC' n Vr,F loops, Expressions al'l' deril'ed for thl' bcamwid th, ofl'l'otivl' hl'ight, J'('cl'ption patteI'll , ampli tude and pOsillon of the back lobes and the dfeets of loop voltage phasC' and amplituci!' ciirrrrrncrs brtwl'l'n loop". Thesl' eCjuat ions dl',;cr ibl' short a rra.vs of any nUl1lbr r of loop' ;. The most s('r ious lim itation on thl' directivity of supcrcli rl'ctive loop a rra.vs is t 11(' I'ollagc pha"l' ancl amplitudl' ciiffNe ncl's bC'lwee n loops. These cliffC' rl'nces bl'tw('rn adjacent loops add up to obse ul'(' tlw nulls anci dct('riorate tho reception pat terll.

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VLF超指令循环数组

SUjwrclirl 'ctil·。v可以是短VLF循环数组bC'的每一个i 'vecl，因为' brlyidth ' d<'取决于循环的数量r，而不是数组的长度。在ddition通常的因素限制年代lIpel 'dircctivity rc不是所以prevall孩子)由于tl1 \ ' (' (Ircoupl ing b('(我\ ' rc ' n Vr F循环,表情al孩子们“deril”thl bcamwid th,笔如'otivl hl 'ight J”(“cl 'ption patteI会,ampli态度和pOsillon叶背面和回路电压phasC的dfeets amplituci !“cirirrrrrncrs brtwl' n loop”。《欧盟条例》(eCjuat ions)、《欧盟条例》(eCjuat ions)、《欧盟条例》(eCjuat ions)、《欧盟条例》(eCjuat)都是短的。* * * * * * * * * * * * * *最令人担忧的是，对超有源环路的指向性进行了限制。这是11(' I' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ')。这些cliffC rl 'nces提单扑(rn相邻循环加起来obse ul的全国鞋业协会(“保护大浪湾null dct(“riorate pat terll tho招待会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of Research of the National Bureau of Standards, Section D: Radio Propagation

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