VHF/UHF Antenna-to-Antenna Coupling Test Report

117 Pages·2012·3.34 MB·English

RADC-TR-76-180 i
In-house Report
June 1976
VHF/UHF Antenna-to-Antenna Coupling Test Report
Kenneth R. Siarkie(cid:127)vicz
Robert L. White
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SEp 71,7
Approved for public release; distribution un'Imited
ROME AIR DEVELOPMENT CENTER
AIR FORCE SYSTEMS COMMAND
GRIFFISS AIR FORCE BASE, NEW YORK 13441
This report has been reviewed by the Office of Information, RADC, and
approved for release to the National Technical Information Servlke (NTTS).
At NTIS, it will be available to the general public, including foreign rations.
This report has beer revi--ved and approved for publization.
SAMUEL D. ZACCARI
Chief, Compatibility Branch
Reliability & Compatibility Divislon
APPROVED:
JOSE! P J. NARESKY
Chief, Reliability & Compatibility Division
j
FOR THE COIMER:
w.Aict. iv / (cid:127)JOHPN. HUSS
tIt swne gc1I5 Acting Chief
1.10 Bull P.11.00 3 Plans Office
JutS,V ;, CA ]1 1 h . . ... . ... ... .
t 1'sF Iy1 10 .AVAILA-11(cid:127)ISti1Y
-- h,sl.:- a,(cid:127):uTr 9011L-
ro not return this copy.
Retain or destroy.
r "I. no .
VFtC1.ASSlFIED
SI riUR.1,C _. A S%' IC A I ON Of THIý' 05 Deff:o~,, 1
REPORT DOCUMENTATIiON PAGE
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*RADC-TP.-76-18()___
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* VHF/UHF Ancenua-to-Antenaa Coupling Test Report, 1 Juno _13 -. 1 Oct 73
IN /A - _
2 j T364j -eCOIzIRACý OR GF4NT W~MBtfl'.)
Kenne~th R. Siarkiewicz
Robert L. White N/A
9PER
-ORMNIND OCIANIZif ION NAME AND0 ADDRESS TI PGP :~LE MENT PROJE (-'. IAW
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1-0-17-ROLLIN OFFICF NAME AND ADDR~ESS - , RFtPOFRl OATE
1~June~?
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74 -MO.ý: TOR!NG AGENCY ,JAML AOGRESS'!I dIfIfr-n' fl.- C-1z-1111140 Olf-f) iS SECRIT Cncassfie
15a CECLAS',IFICA.TION O0NRON
SCH.E DULIE
16 OI;TPI8-jTON STAT EmENT (ot hi. R.P.'I)-
Approved for public release; distribution,. unlimited.
17 DISrRIBU IION STATEMENT ýof 1h. *b.t,..ci te,,di I Tto,), 20. It dIff.,enl I-on R.PorI)
N/A
19 KEY WORD5 (Continu~e roe'.rte aide it ecoseary a.nd Identify by block.n vmbr)b~
Anter.na Coupling AS-1131 Att n
1
AT1-197 Antenna Electromagneti.- Compatibility
AS-1018 Ant~enna
AsS-1O97 Antenna
?O ABSTIZACT rContIn.~,' n Fe r. id. It .......I y ad Id~nti-y by b).~ k n..her)
t-T his report presents the lc-sults of coupling measuremcnts made between pairs
of commonly used communicatioas auteninas (i.2., AT-197, AS-1018, AS-1097, and
AS-11.81). The coupling was measured as a function of the horizontal and verti-
cal separation distances betwe.-i the antennas. 'rhe measu-cments were made over
o frequency range of 100 MHz to 400 M4Hz, and t,e coupling is presented as a
function of frequency oa oscillographs.
~
FOAM143 .N0O1 65 IS OBSOLETE 121CLASSIFIED ~y
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SECURiITY cLASSzzIIcArzoN 6TillS PAG %,f DaOta I , .d)
UNCLASSIFIED
UNCLASSIFIED
SEC I I AI I) CL Ass rI CKAI In Fj TI, 7PA L W", 1)01,IOd)
TABLE OF CONTEN~TS
PAGE
SECTION
IN.T RODUjCT ION 1
I
I [ACKGROUNIJ
III. DESCRIPTION OF ANTENNAS 2
IV1I.V. DESCRIPTION OF TEST SITE 8
11
V. TEST PROCEDURES
SYSTEM CALIBRATION 14
16
V II. TEST RESULTS
LIST OF FIGURES
FIGURE PAGE
1. TYPE AT-197/GR ANTENNA 3
2 TYPE AS-1018/URC ANTENNA 5
3 TYPE AS-1097/GR ANTENNA 6
4. TYPE AS-1181/UR ANTENNA 7
5, POLE NUMBERING AND POSITIONING 9
6. ANTENNA COUPLING MEASUREMENT SETUP 13
7. SYSTEM AND CABLE CALIBRATION 15
I
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..-- (cid:127) , (cid:127) , . ,--,L,...,(cid:127). -- -- -(cid:127) .. ..
LIST OF TABLES
PAGE
TABLE
8
TEST ANTFNNA SPECIFICATIONS
14
I1. TEST EQUIPMENT LIST
22
111. INDEX OF TEST PHOTOGRAPHS
I
1I
vi
Iii
I. I:iTkOLUCT 1 W'
lI1 ,L j Ljct i v of this L-ffurt is to providc (.oupling data
on four cormiunications antcnnas utiliziiq sieccifiLcd anterna
:jeoi:ctries of horizontal separation and vertical displace-
,:e, t. Tlhree of t.L an tennas operate in the UIF band , whil e
tih foirLna operates in the VhF Latiu.
Thic teiainder of this report is divioed as follows.
Section II outlines the background of the problem and the
rtou ireL:ent for tic da ta. The foIl ovi ng thrce sec tioi,
iroviu: -j(-scriptions of the ar, tennas, test site anJ test
equipw"nt (including test procedures), respectively. Section
GiscusCs the systeml calibration data to be used in con-
'I
ijuIcLiC'l V,it h tht. eedsureu antenia coup ir ig uata to obta in
L!:., -ntLnra -tn-anu rnna cou l inrý. Tiie final section provius
oscilloscope photographs of the measured antenna coupling data.
II.-- I.,C K 6 ",OUi'b
i.c. ;,it Furce Co..ui-uicatioris Service AFCS) is respon siLle
fr tl-c Gesign, i,,stall ti on and .,ýainter,3r.:e of Air Force groJnJ
coi;m.n(cid:127)ication systems. hs such, it is fr(cid:127).vuently faced with
the task of locatinq more thzn one system at the same Iccation.
t.1 thougn the systems ,(cid:127)ay be opera tiny aL widely separated
frequcncies, thL possibility of mutual interference is still
great. This is due to the fact that no system tratismits
I
just (ine fre ucut.cy aic no system is sensitiive: to just one
f requctl y.
There are three principal methods that can bc used to reduce
tie risk and tile effects of miutual ircompatibility. These are
frc('uV,,Ly spdratiuon, timie sLparaLion and spatial separation.
T1kv AFCS installations nake use of both frequency and
spatial scparatiors, lhowever, data is lacking on the antenna-
tu-al.tiUrna coupling as a function of frequency anu horizontal
separation and vertical displacc.nett t, etween transmittirn9
anJ rec(ivinn antennias. The data Lontained in this report
ýrcviýc thc sl,atial information for specific geomctrics and
a'.tcnrdjs i. the VHiF anid L;hF frequency bands.
l . LLSLRIPTIO;j OF ,(cid:127)iTE,1,L AS
T1 is scctiGn cortairis a summary of the characteristics
eaac ii arr t nra. tested. Photographs of the antennas are
i:,cludcc ,s v:ell as a taLle outlining the miost relevant
c (cid:1)a r !fr, i _r CS
Ty'pc .I- 27 (-igure 1
.)
c A i-l';ij- is a vertically I-olarized disc-cone antenna
1,!1
uicrati r j it thy. 25-4CG '1,z frequency range. It possesses a
raoiation pattern which is circular within 0.5 dL and a 1.6I: ,
!nxirium, standing wave ratio to a 50-chin system.
.... ... I...
S.
I
LI
Fijure 1. T(cid:2)pc ,(cid:2)T-197,C!k
I
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