(SANITIZED) ANTENNA REQUIREMENTS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03424A002100010001-8
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: July 10, 2012
• Sequence Number: 1
• Publication Date: December 10, 1957
• Content Type: MEMO

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Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424A002100010001-8
0
Office Memo"rancium '' ? UNITED STATES GOVERNMENT
TO : Chief, Engineering Division, OC
FROM : Chief, Supplemental Programs Division, OC
SUBJECT: I I Antenna Requirements
1. Our requirements fort lantennas has never been fully 25X1
satisfied. For increased efficiency, reliability, and security of operation,
a serious shortage of adequate antenna/filter/crystal systems exists. We,
therefore, request your earliest possible assistance in obtaining samples for
evaluation to determine useable items for production. This work will be
chargeable to funds under allotment number 8-7912-50-600.
2. Present methods of operating ELINT receiving/recording equipment
establishes particular design factors which are outlined below. In general
terms, the following conditions are established:
A. Coverage from 50 mcs to 4.0 Kmcs is required.
B. Construction should be flat, two dimensional, with height and
width dimensions limited to the values as specified in the following
paragraph.
C. Crystal holders are required in reliable assemblies to be
attached to the antennas used with a specific holder and crystal.
D. Filters, where required, should be part of the antenna unless
the physical size is prohibitive. Under these conditions the filter
may be part of the crystal assembly.
E. The gain and beam patterns should not be less than a dipole.
In cases where beam width and gain cannot be maintained above this stan-
dard, points of optimizing these factors will be provided.
F. Cable connectors for attaching the antenna to the receiver
should be the MB type with molded fittings for maximum reliability under
field operating conditions.
3. The following table establishes frequency, filter, and size factors.
DOC REY DATE
L ApR BY __7/_3.7_
BRIG COUP 3 apt TYPE _- Z--"
BRIG CLASS PACES REV CLASS C
JUST Z 2 HEXT REV Z-V"& AUTH: HR la-Ti i
SPM 7-696
DATE: 113eceft er 1957
Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424A002100010001-8
 Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424AO02100010001-8
~- - ,
? n fit
96 17, 1p r 6
FRMrwj T
FILTER
ANT. MAX. SIZE
A. 50-150 mcs
45-165 ica
211 x
B. 50-500 mcs
4+5.-550 men
C. 50-1000 moo
None
Tt
D. 150-500 mes
135-550 mcs
E. 500-1000 me
n
450-1100 moo
11" x 14"
F. 500-2500 mc
s
450-2750 mce
G. 1-2 Kmcs
900-2.2 Rocs
4" x 6j"
H. 1-5 Kmes
900-5.5 Kmcs
1. 1-10 Kmcs
None
"
J. 1-2D Kmcs
K. 2-4 Kms
None
1.8-4.4 Kmcs
L. 4-8 Kmcs
3.6-8.8 Kmcs
M. 5-25 Kmcs
N. 8-16 Kmcs
None
7.2-17.2 Kmcs
0. 10-110 Kmcs
None
P. 16-32 Kmcs
Q. For use wit
h
None
55-75 nos
Antenna "A"
above
4. We prefer to have all antennas and filters
fabricated either by etched or printed circuit design. The required crystal
holders mist be mounted on appropriate brackets for attachment to the antenna
and receiving equipment. (See attachment).
,
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The, exact dimen-
sions may be altered depending upon the antenna type planned.
6.' Our request for antennas and filters of the printed type is patterned
after the AN/PR-8 system which was assembled by Stromberg-Carlson. The series
of flexible antennas frog be expedited by information gained 25X1
from the CS-8 antenna recently requested. (SPM 7-678).
40 7. The requirement for this set of antennas is becoming more critical each
day. A flexible item with the maximm reliability is our only hope to solve the
25X1
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Distribution:
Orig & 1 w/att - Addressee
Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424AO02100010001-8
 Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424AO02100010001-8
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Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424AO02100010001-8
 Declassified in Part - Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424A002100010001-8
V I,,- . 0, a
Attacheent.to SPM 7-696
4"
'o
ANTENNA
BOAR D
CRYSTAL
AND
FILTER
Declassified in Part -Sanitized Copy Approved for Release 2012/07/10: CIA-RDP78-03424A002100010001-8