US1640534A - Wireless antenna system - Google Patents

Description

Aug. 30, 1927. 1,640,534

F. C ONRAD WIRELESS ANTENNA SYSTEM Filed Dec. 14, 1920 )Vul.

WITNESSES:

.J #1 f r/ f INVENTOR .frank Conrad ATTORNEY v "'i,-'FR NK' CONRAD, or PITTSBURGH, -.P1 :NNsYLv N1A;f ssIGNdR T: WESTINGHOUSE ELECTRIC, &- MANUFAGTU ING OMPA Y; A .com onAmm' zgr PENNSYLVANIA.

- A My 'i v litk d l te Massag s-s l a tr I smission systems andjmeie' particularly 'tion' with; 'sueliffs'ystems jventiopis to prov d an i pi ye le wifi a temj a system-,1 which; p Qssesses' meilied {11dwell is f eiisi'lring afj deerease" in st'atien derease 'efiected; in the entemiei losses.

egspecific'ally; the objetiof my-invem Yisiti p vide, n a e a .sy mf.whsffi y? 'fiumber. f re at y ma l: fi is AIibihef'oloj ect of myinvent'i'on is to; so 2 'a 1 1gej the 'sepai ate antennse that Ta; maxi- ,j' iumsmou tjof enengy may be radiated fo i ym er y i p t I i v r {1:111v a o j c ofmy nysnt q islto p'r'ovicle means wherebythe' aptennee maybe V e: ergized, simultepeeusly [from "e'"-; ommo soui ceofen rgy A further object} of my ilve itlon. 1s'1t tensive overhead-antenna system's heretoforeproy'ide means lwllereby ci siqmai'yyco f reiia l and resistance jl'osses in th e conducigi s leadiijig tpi tl'le antenna maybe lim tedto T 4 pr s P a t e iii h sh-P i "1 sdi'sfance transmission systems is" to employ gfl feimi gfihe axitenna extend for loiig distaneelsf substantially parallel tc the s n-fees ,T 'fthe earth"; Irf i' systemso'f thl's typeg-e rierf I fr is *Lisually s ippliedyt e the; enfiennef-sysg antenna empldy'ed J i esistan'ee'lesses which, in tum,- Ifdiige tlie V i 7 effective t ransmlss o n renge of wireless sysm -i is .s

-'One method of reducing the resistance lesses, which are C(iliSGd reitherby f ehefgihg cu rent 11. y fpw w r fi s isle; a le? a-n't iges in ejcqno my Of imgifcerial anilspac e;

i s e ne xpe s by," r'e'a q 9f a large fl i fWIim Ess-ANTENN lerge eeiiducters iii t lt 1e 'hi'ghiieq ieney an cu itsef the antenna syStemmThis methed his i ts limitations by reason Gillie-"fact that indiietzmee Coil and the se ca1ledggroui1dlead? is 1101;? idvisable beyond certain limits. Furthermore; iio pr0vi'si0n"' is made "fairedgging the long pa ths traversed byithe ehargingjcurrents 'supplying the extreme end eff fiche antenna system.

,Abeqrding 1310 my inventions lireduce the large cliargingeur fiegt lssesxliejpetofore i1;- s r f i i h ng; W nt ai y tems y clividing the antenna system into a Iiiunber bf small eI teIiriae; the several aintenne'e' being grouped areundf 'e cenfiral point'". Each zintenna is, conn'efcted "90 1 gipund through; an inductance c oil hich'mey fiifietii 'fb'oth as ptuning device, zmd' ash-called pgwer transfbifmer. *Prpvision is zilso made "for 'simu'lg t n m s yi v ifi i il we m a t fiom a co'mmoi source of energy.

"My"i'n ventibn may best be understddd i'eferei ceito the ,zieeempanying drawing,"in whichz v jF-igurel is a, diagrammatic 'perspeetive iiieyv of 'cii'euits and apparatus embodying theipreferi'edfo fm of my invention. 1

- 2 is a: diagrammatic perspective view illustrating ZI IIIOdlfiCatIOD 1n the irrange ment offthe antenna sysfem in' the transmissioil system embodyilig my invention. g Fig. 3 is a, diagrammatic perspectiye view showings still further modificxtionfin the arrangement 0f the antenna system. v

Like numbers are used to designate like p'artsliaving similar functions.

' Fig); 1, I havelshown a; plurality ofiieiif Pi Ifkil1eI-jmtenIiee" 1*, 2; 3 and supported in a plane substantially'parallel with the Sui face Of tile earth ,by me' ans'of tew'ers 5, 6, 'Z'Tand s8," E zi h' fanterina, is Connected to" .21 grbi iid" C O IldfiCtQl" 9 Q t-hfeugh a? groundeleed which includes therein Ten ind'uc'tanc coil 12' thzit may'flinction bothas a tuning dei i'ce and esq called fpowei' transformer.

grim ehtennse are ener ized from a} mm mm; spurge 'f ene gy, such, for exsmtgle a "w suessy '& l

duct-ance coil 12, through a conductor 15.

nal of the high-frequency alternatcr is central point together with means for enconnected to a ground conductor 14. The ergizing said antennae from a commonsource remaining terminal is connected to each inof energy.

The advantages of such a system are and conductors 16, 17, 18 and 19, respec-' many, such, for example as: the reduction tively; efi'ected in the resistance losses usually in- The antennae .132; 3 and are insulated curred in the antenna system and the leads a from one andther hyvmeans of insulators '21, cdn'nec'tml thereto {the smaller ground area the antennaawhich are arranged in 'tllie -9 & triangle, PP OI? ytthree. WQY the several antennae is substantially zero. instead of four, as sh'dt inin Flg. 1."

of a type Well known in the art. i required as compared to that necessary for 1 {Fi-gg; QhtHe' -system s'ho'wni dnfersrein 'tzhe'lcng 10w type of antenna he'retofore emthat f-]5i'g. vtin-me number and arrange-j ployed merprcvision of a-nadia1ting=sy-ste11 ment of the antenna. 111 this modificationqf in which the phase-displacement of the V j i'n' Value{thelafge decrease in the cost-f T system Sh in Fig-, differs from; lconstruction' and maintaining the antenna that of Fig-am the radia man'gm'e t cf the antenna;

' t 'I source of supply; "and Other advantages 1 brought out in fore'gdir'fg p'orticns [Of the of the 'tim.; a I myinvehti'on, it is obvicua'to pn killedjin I The ,energ i,rad1ated by fth'e systenilfm'ay th'eiartfthat, Various modifications 'maybe be continued y means well known to made in.the"arran ement of the antennae the art; such, for exanipl'e; "(if and the circuits connected:ther'ewith', jvv'ith-j key '(notishown)inseamin thefie1d-windout departing frointhe S131-ilt; i1'11d scopei of manner ivelllincfwn tdtliefaft." 7 'While 'Ifhaye shownthe 's'epamteiantenrality 1 pfthe;fhigh' freq ency generator; yinvemicn; I desire; therefcre,"that'on1 a Refe'riingto Figs, 1, 2 ands, u'pon casing Such nmaaaohs shall be imposed:threcnfas v t11 c'ontro11ingkey, (not shown), nergy is are indicatedin the appended claims. radiated from thegantgenna, circuits "in [a p claim as my invlenti'c'iiz v a 1. In a wireless sl'gnahn -s stemap111 n n U I system; the increase iniefficiencfy "Obtained V Fcu'r t WQI's, 3 f? DBQ SaEV by vfeedingthe antenna from a cdi'nmon support the .a-nten a in 'th-is'farra ngm ae d lead 31:1 is reducedio a 1nf1'ni-' While Ifh'av'eehcwn nae-e embodiment set of v non-parallel adjacently disposed meins lated"fromione aniithei', ,jthe opera: antennae grouped abent a I central painta ti0n[0f"th systinisufiafiected 'by connectg grcund-lead t6 the mid-poi'nt vof each mg together the severaiantenna; One ad} tenna, a tuning c'il'included in'ejach'g'rcil'n'd I vantage'in havin the s everaljriadiatifig'am lead and connections whereby each timing 'ta'nnaeuelectri'cally' independent, 'i's-that-i'n c i1,,may'ifun tionas a'hpeive'r-tran'sfdrmer.

case 6f a breakdcwn inanetitlieancenm, 2. InQafWi'reles's sign ling syste'in afplu;

that antenna may be readily discbniiete'd ralit'y (if radiating antenna, a plurality cf fr0m t he. antenna system; towers for supporting said-antennae, where- Furthermo e,,whi1 lhave sho'wn a 'tigiht by saidl'ante'nnze arefldis'pose'd in substancou lin .betweenthe ewer-circuits hi'kih t-iall' a rect'an ular arran 'ementga roundm i t y t a: a a:

include the high-fre uency generator ,-1'3,, lead ci-fcuit fcr each" antenna andi'ncl'uding grct'ind cond-uctorfs '9 and 14,; pdwer bonauc therein an'indu'ct'ance c011,, and ntieanjs' for tors'I 5,'16,.- 17,18 and 1'9'aiid portion 226i: energizingsfid antennae from 'a common the tuning coils 12, an'd the antennae jc'iT- scurce f (if "energ ,thrb'ugh said inductance :cui-ts, each of y hich'in'cliidesan antenna; coils,

a loose coupling between the twid circuits;

' of distribution resides in ithe decrease (ifof this system figdi'st'rihn't aground-lead"11,thje f6pel ati0n 6f thGIS yS- 1 In a riiirle'ss' isignaling.system, a plut'e'm, as a whcle,'i's' cun'afi'ec'ted by employing 'rali-ty emanating" a tenna, a ground-lead By disposing thefjpoyi ereti'ansffmei s 12 included in each ,g'ioiind lead circuit, said directly beneath"theantennae 'l'amenabled inductance coils being separated: by a distc dist'ribut e .energyte the. seyialantaiinae ta-nce greater than. apprt'JXimatly half the at relatively'lc v, Voltages Disadvantage length (ifeach an'tefi'na, thddistan'c'e betWeen fact that the ,ju uarcbmna l0 'in'the 0nthan haljf the length cfany-cf said antennae, ice of "6 "er and means "for supplying energ to IS'Z iI Cl i frdin a CO I IlllIUII V SOHTCB I radiating ante Value. A further-{advantage 'of this s tejrn ;0f] ener'gfj' I a 4. In a Wireless signaling system, 'a ipIufected in the'mattrdfinsu1atingc6sts; rality of radiating antennae, symmetrically Inmy inventicn l havefprd ided an an; disposeda bout aLCentraLpOinaa grbiindtenna sys'tem comprising a plurality of fl sh lead (iir cuit fc'r each antenna, an inductance parallel radiatingantennae grouped abii'ut a coil included "in each grciind-le'ad 'cmuit,

adjacent ends of said antennae being, less said inductance coils being separated from grounded and the other terminal of which one another by a distance greater than apis connected to said plurality of inductance proximately half the length of each antenna, coils whereby said inductance coils may also the distance between the several antennae function as power-transformers. i 5 and said central point being insuflicient to In testimony whereof, I have hereunto v.produce noticeable phase difl'erences between subscribed my name this 7th day of Decemfthe radiations therefrom, and a high-freber,1920. V

quency generator, one terminal of which is v FRANK CONRAD.

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