BSTJ 50: 7. September 1971: TH-3 Microwave Radio System: Networks . (Drazy, E.J.; Sheehey, R.E.; Wang, H.C.)

8 MB·English

TIL-3 Microwave Radio System:

Networks

Hy b, J, DEAZY, IB, SITEEMTEY, end H,

wane

{hie per cee eal vetanrbn eich promi te ounay
axlectndy reawe! in tie TH2 meow tens aed reser, a
fhe enuaiane, viel eumuaie plitude dein nonin ioe

‘Phe frewoney seaivtg regained by the bruanve -anamilie
and grecines of Uhe TEES sali eyaiam i+ proce by pusive ner
Forks. Actacen-hane:seeriviy,agetbar wath supgretnion af exe
eat th basins oe ths sntermedbate requcney (TF) oil
fee eepestal ir the mviving modulates end Al precnper, ow
Tiled bya Joss and eley-ecnlizd scloreialetoareey Hie
Mierownss Glen ail sleeve aacrorks prose ingyen and
idiviaingecismed weivity, farrisk tae recived Garnialicn
gaint unrated tones en taiae orguiling iv Uy winnaar ane
Sr, aed une me} for the rulrnlewag of sruneuere war recivens
fin a cermin apcenae-foxd snsrpinl, Wieensave erlay musiess
comput far the exrelepe delay distortion (FVD, of the selective
privwsave oramieien elute! ay tal only a wlalively oral
Yosave af DD rams ta be waned op

TP slay euslrs

"The Jats wl footie of the aeeeive merowavo truveiun
vbr are described i wnolie= paper i te amie? were overall
eauersents ne thy tecnesaiter sn] rorlver lesion sre ale px
2198 vem wens, RYSOTAE TREEATCAD SOLABAL, AROKEMTRR TET

seated, The tramnission path o° [he sanemiter epntains to eet,
febworke, Lae Lsezamitter anlerowar onwnr, whieh precedes the
trveling-wese be (TW), <2 ele eel cortinieg lee, wish
follows Fe TUT ard serves The dia’ Zunctons of miploine fone
‘eugenics ilo w eos wacom Teed ravagids nnd of providing
esbvunn aT pert ose ted ‘enaenter Lu alot. ‘The
fanned separation actor servo Ube tneever maltsleecr upd alsa
fovides all vosirer RI coloivity, The reve'ver mictonve Ser
Iilds the rosivar mitromave turset {1¢MC) tae vocior gral fr
toplieabion to rin nneiver madnletor. He furcsbus wletinity in Uke
IMC paul, fr apie oduct, ue none usiaion pulls To
livin sranesieion and delay izezulasibios ve us vole, 4
Inivsnensr werk are seized co prscent roturs losses in exces of
30 UB wt afl Teaqaes'ee witch must bo erected

aa Trosanier Micrownus Notwerk
‘The tnastnter witrowave ulvork consis of s buodace Ste,
fatioaced in WRG) weverside, and a one-section ritronzve delty
fenualizer ofthe typo dovelopuc by TA. Abeve avd FC. Wangs
"The elncieal requires for Us ehoork evolve Thor fou
veielions Thane 2:

{8 This netmorke rime provide ceoue: aktena on of Hee Coe
tuier sunllesoy caine Lek, ct « Stequerey fy — 70 MTTs wed
trend hi siden ae fe — JAD BMJ, w prevest avers u" Fe
TTHPT and nterbreren wits meenuraments of tho desced salebum

(Gi) This network wd uve whanae combining Blter, vgetbos, ust
foil che uvoral trainer RF selotity roqnieement

(G8) The EDD af the transaier suerowsve velar rnva he In
han 02 na ever che rarae fy = 0 Sills, (The intertanes of mins
‘REDD, in this sermon espa ly, has hoes carihaseod 'n anol ter
Inner in hie fev

(G0) The snmbined solectivty, ast thercene the EDD, of the =~
risining riorsee netwenke of tho hop (Le, eel eomining ne

irnlirg twos) aviet be seh thatthe EDD ean be eompenester

tn ale reromave ceay qi:

‘Candlcticg inpletions 0° Zhose tanideratione le to equal division
of the ceuneatter gulol-bamd KP auken'viny nulceamaoe bole,
The tnanariter esoneve neterk ad ee bane] eomabiing Ste,

Tie ems ary 0 oe rbot pam
sersoms 2130

sath recline req -erente for he taaaitter misoweve network ms
[utlowe:

woe Delay S¥etorion 0
Rawelehe Delay Distro, (000

4 SSAIHS 20208
TASMIM 1.0

Trt ose band (G20 fy 1 15 MMT} nape”
Agsction lowe fy — HUME Pa
Tnseeion Jos fo — 140 NTL Esa

“The iter af this neswurk i senlzee az © stewsonacor quar

veuvercouplee undp slrsenre baard op a owes ua na yflate
Inonlitule proloigpe having 1 SeHD bcdidlh of 642 MT. Bee
festwator is Srded ly islve obeteeee in the Zora of atraye of
Un sss dal ate, To ampere for che evant of Tae Moa
‘leveateite hie rons “rom obrcie Lessee lish alustronts wi
face the lengths of le coupling lines. Ligne 14 sows vies of
thie newerk and Fig Th sectional viow of tho eulny oque ee. Typ
tal ponforazge ebisrovatios appece in Pig. 2

a Chan

cm

“EScuupice uf Si ens! eouabiuiag Rene and charne: soporatig,
nrmonke which weree ve RF mksplexse for the nai smite
End teeiverss recnstively, te svawr in Fig. S. Allows) U2 ccm
Fine filler end sepanecing neseurle es i ore 9 of sbraccure wad
Croton” vaquisaierte, similares ia lie eign. psasiplos and.
paysead eoigiscione, tpeiber wife He facie frat tasyekace a
omen wieraviee delay eqaslver ood, bea late ene, oomph
yrenf cecl ule with weet tn rletiea) eeuinn te, maki tee
Srnienh tn esc ser Hogetiee

‘The civesienal flew mrfigurarien developed by: AleleS eo
sisting of soricmecrneesnl rineisare henapass and. bua-njection
Fillers of fal pdr, fared Io ssrting seint im che reign of Uns
tuuiplcae. The dicen Alor hae the flowing aenubes coer
Up oneseant-resietcie neue ers tae maliplssigg fn canhice Be
Sys miernenss equips

ising Ptr a Chanart Separating Nee

{iy Duy fe ononponecss, w Maansee Filter and a berdreecion

iter, aw “eel -eynavige al revel va iver RR scectvity ingen
Gr the ve (eve Dyed omer, ce Ramet ars and se
TS the jesnesan tae of falacantinl no een > ohereersriticlly

CERES yess Meer beree oe caer
9149 min sma erenmae mReENGOar FEMA, FEORRURER 101

EiRaL DERE hese tn 6 poet oe: we

hardness ft in the conrspouding wsseubly i ennstcnl reastanee
teva

3) The evar “T" slap af the sirootons] fle dudllitates
dovien oF ccimpmrent ‘or other ighthanded” er "ella? n=
eal,

Atos dioetooal filter” i Gorived fom a trce complemen pis,
ie, basepase esto su uae «renal melo nemsears 2 the
fviannepar: sven worEeien of Pre pve La be ta all
iene, Ta enaoarve epkee, elt codmemies "9 ecaufacsure, snd
rraice adjaconrhsmneal celay cEvaauas we Te "woul poe ta
plyrienly aPoining hays via ie biatkcceuden seeiun, peewee
Fasiplemsatery dsizns wee ew vl Torsone filters hy programing
feign. sotepator to prowrt Ue sighifean: traneieson end rer:
tion parameters of eomg'tsan.ary prnsye, in a-bitary eee
tnnngseeonstrs rom £0 rnd so, a oe ung he
ould (le of tho Tetrining ones toe optnim perfamnsnre m teems
‘shalom topuinenerss, After eetefueony puctelypes ‘rere dstinsd,
the micnwavs sements nary synthesis, ting estiliy the methed
ff W, W, Meudon fe the Earle acts aa cal of Wang for Lae
Thene=ctction seelion, The alte: ene eppination of trenucasione
sepwoues 21st

2 vee |
he Hy
” co oe
at
1
iy
4 |

ali yale omen wugminer ane nets) ped

Tine pathos: onthe asl pos ina dese whe asexn ea yin
rere, nce fort svdidnesocy "Be" nich he eomap.aion badass
fected aeenanvd gent lee, bat oqunes variables in the cha

fetenetiespadanet of che eevsling lines heteren. esonatens. Tis ie
fehievid Gy seplneng pet of the cad wall of Hr ncuegide wil
sonapped plese

Our-efsand eelactivity rsivenerce for che kandpces pet af the
channel sorting nceerk or Meatien: ta thse of the Leanne
2142 re miu sronun omnes corms, SERMON m2

igre eon as given in Sei 21, Te-hend reizements ure

aeedistnd wilh thore of tho cutrespondny cksane appanage
‘pork ad ll be ceane nse pa
"The mivvoeave ealinatcr cf the Ianiposs eetion af tae channel

scxahining neiwork eooriet> of @ singly ceria, risimely at,
Sacresomor,sartss-onve-eaaplss oats, fuse on a Ws Ree HO"
fatype suving « 3eJR Iaulwith of 64.15 MIUs, The ee.fom fai
feted in WILLS wavomiile, will weosarcis bounded by induetive
febeasle im the form nf stereo enezya oF eylireival posi The
beschseection vectics ae fabricated of L159 mvoxside, and
fenteina font resoustore, ws scaceerselarmane as deseria in
che peweing paragraph

fo gul-uldund s*esiviry requicemen’s forthe bars oat af
the ehuogd eepen ng wesenk ase abtaized by aubteacin Soa che
frenal.roqutements fees Twile 1 of Lae atooud paper in this Seach
evo au

‘he sute of (the inserion Ines ofthe transis mierommre rete
‘and 15} he fnerton: loss of she chun! eomcbing nerwork wt eee
significant trecucney. The woversing eguirement curs out co be thet
Aiseimination of 9 dl 2 roqued at a froquaner fe © 207 MUL

‘Ae in the ease of she envemitzer weromave recwoc,inchend re
dquzemeats for the cbwrnel combining lve wud ehinnel epering
heteork wore established on che hasie of EDD, with the epecife
‘riterion that the EDD of the treramision path between the com=
bing port of « chan! combining network nn he separating port
of tho ompunion scparating nctwork he less thua Od ns over the fre-
‘quency range fo = 00 Mls, and les than ze over the range fy = 15
‘Mids. With the design, and therefore the KD, of the ehuael com=
bining network established, there emasined tobe determined the onder
An! bandwith of & baniveeseoston forthe channel separating mele
‘work which would provide the vequied ant-at-hand scletiity, and
Abo, together with the companion eerbining totwork, bee EDD
within tae range whish eoule be scoommodecrd hye technically end
ceozanieelly feasible miccorcve equalize. An egat-ecozater, singly
feinated, masimally-fe:-tnpltade cetion Having © 3a bané~
Ividh of S18 Mita was sound to have the requisite properties, and the
eparalion aot. based on Ula, Wi the extepon of Uhe to
ltural lasciace ecmeeos tr dieonal kero” the euaraion
neiKork is smiler to thar of the cechining fr, The delay equalizer
te minch Eke fie one wel on she trisnitter mivroware filter, ang i
ftiecbot ae shown in Fig 8 Tiwerbay los eharnelerties of 8 com
Dining aetwork wd eeparsting notwrork wre sbowa in ge 4a ard,
respectively, and thei eosbined EDD Pi de

a Receee Miermease lr

‘Tho zeociver micrownve itor combines tho signal withthe reesiver
microwave ea:tier for appliation to the Sebottky-barrier receiving
roduleior, and also provides aeledvicy

boise, This is w true cowpleneniuey” dzeeional
resonator bans: ant haslnsion setins, Ths desga i based om
‘ ximolly at, lossless provtype baving 9 SID burcwidth of 44
Alla. Sinee this flter ie not reowied 2o eceormedute larg band-
rwicthe n tie pes rion of its bnslsnjertany auction, Use sloped
Jimpednce corzecting Tnes wens waa, with voslKiae steiner fa
cost Hletrea) requirements ae

Toserti lve ab fe AMC! pose to modulate pont 28 fb
Trserfion So at fe 70-MBe, RC port te mastlator port & 4.5 a
244 re mane se ZUOHINLONL SOAR, SUEVINEOER HTL
Asbewaon sng, gma pore 2 ru
80 NH, 3 01 1B
iy = RMC frequen)

pom, fo 4 00 MEE eofy

a Serwonne Generator Pane Suppose Pier

At the output ofthe siocoave generar, puns tongs were lee
ted ara fous! to he barf in some ene, since Lhe appesrod in
fhe saschand. signed frequency. he 6/6, 1/12, 18/12, and 7/0th
harmonics e! the tranny mulcor carrier feqieney are present
find ean eause unwanced baseband ions. A fxo-eavity bandpass Mer
je aed at the output of the sierowave generator to suppres thea
toes, Becauee che ouipot of he generator iain WR-112 wave ui
This sie 8 aleo chose forthe Fler. Besanae of tho narrow separ
tion belween the operating Seequenty and the euiot irequenty of
WHRAITD pide, special conskderntions were given to these filters to
rexiaee the pasha insertion lage wl to avoid posible “holes in the
Stop bond. Tl wor owchaied that for beet slectvieal pertormuce,
filter Zor the Jow-frequaney ehannely mist ase capaaitive obstasee
fan fers for bigleCequeney shana ruc use inductive obstcle.
For cost conscenations heze wre rly ‘our mesbar‘ol endes and each
cou inay be tuned wlecttivelly to cig diferet chines tinls
Stugerred feoqurrey etsanel. ‘The three ene for low-tequsacy
oheabels ave shsigned inthe form of towrnavity, maxially Hat,
tives-coupied pass Slee sith supine senda, while the
fourth cee, “or hh fecnengy eb, he (ie orn of toreaviey,
Imavimelly al, cusrlerwavesogrbeeoupled expat We wth if
sete post.

1 Function

"The LF networks that are required in tho Tong-hwul aplication of
the T-3 mierawave cio aystam aze shown in Ti, 6

"The bandpast Elter prove edequate suppreesion to he adjacent
‘ihanmels whic ere reeive!along wth the csi wg, The band-
pass Alter els peoridesuttensan to the sceoad end third harmonies
overated i the preamplifier ne hs! eeko- ike intermodulation noee
Je safely nuoed.

The delay are amslituce equaliers compensate forthe deley dis-
tortions caused by Hie had-saninstion pection of the diveo!onsl
2148
2146 THE SELL YSTRO TRCHTSTEAL JUDENAL, SERTRURER 972

aioe | <= ete
Lo] sata ERS palsy

Tig. s Taran of I nual roteore ia cae THEY eae rio

filters fo the adjarint channels, ead Zor the omall rsd in-band
mmplitde distoction of thr mieroense networks,

‘The "mopean” elizee eoseect Zor chy top shat arises due to
ormal syeenls varatinns, ‘ais eoreston ie neoeeary because the
intermodulation avive of the tacio-eseto is very sensitive 10 delay
slap

58 IF Baxdpase Biter

‘Most cireite in the TH. sepester hat eontain ective devions sre
atively browelnd wl verge introduce Tele tranasion cli
torsion, "The LP baaisise er inchane! chareteretic could be the
fontrllig fcotor in the ineermadnletion noise perforce 0
epee. Thereone the LF Tcpass Alter ie both dea wc ample
uae

sin Devin Oijetine
‘The delay ent amplivde dscorlion allowed in the passband speci
cd the amouat uf intermods'n'on neito, caused by che Sn-burl
tistorions,comribsted ap the glee, ‘he (rananission vequiremerts
for thie filter ave hase on ite coating Bend le n'a
Tmodileton noise per Bler. Thi wonld be onsivalent co a 80-dBrco
noice contribution in © 40%0-rile syst The erlealtion of woe
Tse on an 185 log Tay of atin, which wae foun in Inborwory
rmoveursnents on a e7eiem eotaining a similar fer

Tosernodviation noise coutibules! to the spetem Oy she filter Se
conuse! by toazanission deviations en eeoos

"The ctansmisioa Geviatons axe the residual delay an splitade
sinples of the filter attr f= ee been eqced od, The alay en ampli
five cleramtes of the filer ars bares! om the woret eae Deutowpeae
Fipple ane tod of rgple Chat could occur ix tke equalized Ale
‘The in-band mijetive, based on noise pexformcnee, ad the cut:
Sand oeesves based on et snc tareee ee and harmon
srjeeton, ure 2s “ullow: