CONTRACT NO. RD-128, TASK ORDER NO. 6 WITH (SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A004100070002-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 17
• Document Creation Date: December 22, 2016
• Document Release Date: February 8, 2012
• Sequence Number: 2
• Publication Date: April 26, 1960
• Content Type: MEMO

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UMC~A'SSIFIED '""""
~-1` ~.~ USE 0-._ ,
CI'"~IDEN'- _ L ~ SECRET
,.? ' ' ROUTING AND RECORD SHEET
SUBJECT: (optional)
fRC-M:
wo.
sPM 7-708
OC-SP~EA -
DATE
20 December 1957
TO: (Officer designation, room number, and
building)
DATE
OFFICER'S
COMMENTS (Number each comment to show from whom
RECEIVED
FORWARDED
INITIALS
to whom. Draw a line across column aher each comment.)
OC-SP
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oECSe 6~o u~EDI~TIO~N?sus SECRET ^ CONFIDENTIAL ^ USE ONLY ^ UNCLASSIFIED
Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
 Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
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Oflice Memov~andum ? UNITED STATES GOVERNMENT
To Chief, Engineering Division, OC
FROM Chief, Supplemental Programs Division, OC
svBJECr: High Gain-Broadband Antenna Requirement
sPM 7-708
Dn~: 20 December 1957
1. The has a requirement for abroadband-high
gain antenna~o e ro a or moon ed. High gain and broadband characteristics
are not usually obtainable in one antenna, however, with some compromises we
feel the following system can be produced to meet our requirements.
2. The following design parameters are established for your determination
of a constructor:
A. 150 mcs to 1000 mcs with one feed.
B. Truncated paraboloid reflector not to exceed eight Peet
high by twenty feet wide.
C. A usable feed would probably be a logarithmic spiral. If'
a matching network is required for the fifty ohm receiver:?input, the
network should be incorporated in the rotator control indicator console.
D. Ease of detaching the antenna from the rotator should be a
prime factor in building the mount. The antenna will be mounted only
during the operating periods and removed when not in use.
E. The wind and temperature limits .for this antenna should be
patterned after the U. S. Navy shipboard standards.
3. We prefer to obtain a standard military type reflector and rotator
with a contract being arranged for the assembly of the feed system and the
rotator control and indicator console. Gain,. patterns are required as a means
of determining the accuracy of the antenna beam throughout the desired band.
The following list is the preferred patterns at the half power points.
150 mcs
11 DB
50 degrees
3~
17
?
23
500
21
14
600
22
11
750
25
9
loo0
27
7~
Our requirement for...........
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~~C~~~~ Page 2
sPM 7-708
Our requirement for this antenna necessitates a minimum of side lobes,
but should this be impossible, the knowledge of their limited existence
will be sufficient.
~+. The assembly of this unique antenna should provide valuable
information for future broadband antenna requirements.
Distribution:
Orig & 1 -Addressee
Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
 Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
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,^~ "UNCLASSIFIED [~,,~N~ERN"' n C~'~FIDEN .L f~ SECRET
ROUTING AND RECORD SHEET
SUBJECT: (Optional)
FROM:
oc-sP/~
No.
sPM 8-515
DATE 1? JEIu ~ 1958
TC-: (Officer designation, room number, and
building)
DATE
OFFICER'S
COMN.ENTS (Number each comment fo show from whom
RECEIVED
FORWARDED
INITIALS
to whom. Draw a line across column offer each comment.)
1. OC-SP
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I-1 UNCLASSIFIED
Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
 Declassifie_ d in Part -Sanitized Copy Approved for Rele('ase 2012/02/08 :CIA-RDP78-03330A004100070002-3
' e STANDARD MRM NO. 6/ 1 '' .. l r J / ~ ~/
Chief, Engineering Division, OC
Chief, supplemental Programs Division, OC'
High Gain Broadband Antenna Details
CES GOVERNMENT
REFERENCE: sPM 7-708
delivery date reauiremeat.
SPM 8-515
DATE: 17 January 1958
1. Discussions with) of OC-E~R8aD-EP have firmed
the following parameters for obtaining an antenna end modifying 'the
feed system to meet the referenced memorandum requirements. We wish
to establish the urgency of this particular item as we have a critical
2. The following factors are the ideal design conditions to
assist you in procuring this antenna.
a. Continuously rotatable at the rate of 2 rpm with
positioning accuracies within-.}.~l? (plus one degree).
b. Positioning should be manual activate with power
drive.
c. The antenna will be receiving only over the range
of 150 mcs to 1000 mcs.
d. Remote rotate controls with an azimuth indicator
should be provided for the receiver operator's control.
e. One feed is preferred but should the VSWR greatly
exceed the desired 3:l ratio, multiple feeds should be
provided. F1eed changes, if necessary, should be a simple
operation.
f. Loading conditions should meet MIL specs. applicable
to temperature, wind, snow, and ice.
g. Vibration and shock conditions must be considered
Por a vessel of 100 feet steel fishing--hull construction.
h. The reflector construction is recommended as expanded
steel or lighter weight metals if possible. Weight and wind
loading would be prime Yactore for reflector procurement.
i. A parabolid reflector seems most desirable to
achieve wide band gains with fixed focal length for feed
element settings.
~. A~minimum
25X1
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17 January 1958
SPM 8-515
~. A minimum vertical beam angle of 15? is necessary.
k. The side lobe levels should be at least 6 db below
the main center lobe. In considering the front to back ratio,
the limits are not defined but should be reasonab],y good.
1. Beam gain patterns are requested with special
attention for that region where the side lobes are significant.
m. Pattern studies at the site will not be considered
at this time.
n. Power for the rotator will be 115 volts 60 cycles.
o. 50 ohm coaxial feed lines of 35 feet length will
operate into a Q receiver. This receiver can be GF'E 25X1
to the contractor for antenna testing and pattern analysis.
p. The maximum total weight of both antenna and rotator
can be 1000 pounds. This limit will undoubtedly mandate serious
consideration for light weight components in the reflector and
feed in order to minimize the rotator requirements. The additional
requirement for rapid reflector detachment will further emphasize
the minimum weight consideration.
q. The cube,s+eight, and delivery date must be made
available as soon as possible for establishing space under sea
shipment. Details of the mounting requirements would also be
helpful for preparing the footings prior to arrival of the
antenna.
this Division has given to the project.
3. The operationsunit gust recently advised us of the urgency for
this antenna; consequently, the referenced memorandum did not establish
this fact. Rapid action must be taken on this antenna procurement and
modification because of the early delivery date and the high priority
DistribYrtion:
Original & 1 -Addressee
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Declassified in Part -Sanitized Copy Approved for Release 2012/02/08 :CIA-RDP78-03330A004100070002-3
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r ~LTANDARD FORM NO. 84 ~y
' ~ ~ ~ ~ ce Me~norunduyn ? UNITED STATES GOVERNMENT
SPM 8-54~+
To Chief, Engineering Division, OC nnTE: 7 February 1958
FROM : Chief, Supplemental Programs Division, OC
susj~r: High Gain Broadband Antenna
REF SPM 8-515
1. The antenna requirement, o 'n the referenced
memorandum, has been discussed with OC-E~R&D-EP, 25X1
who urovided details established by verbal discussions with
It is our understandin as artici ants in the various 25X1
contractor meetings, that 25X1
could not produce this ant the desire t ~tix~
We, therefore, accept the proposal from ~a-1 and request that 25X1
all efforts possible be devoted to establishing a contract for
delivering this antenna within ninety days.
2. The following design factors are the significant details
for this antenna construction:
~A. Eight foot diameter paraboloid of circular
revolution.
~,~r~~ou as a receiving antenna from 150 mcs to 1000 mcs.
83 ~6~ _~an~ 3~r6o~, `~? Three feeds terminating in 50 ohm coax for operation '
~-C. The V.S.W.R. should not exceed 3:1. ~2 -~~
~D. The maximum gain possible is requested with the side
lobes at least 10 db below the main lobe.
~E. The best possible front to back ratio. (It was
reported to us that quoted 20 db front to back ratio 25X1
with a possible decrease in this figure at the 150 mcs. region.)
~-F. The main lobe should meet the following gain beam
wi
dth conditions:
150 mcs 8.
0 db gain
60.0? approx.
300 15.
5 db
27.50
500 20.
o db
16.50
750 23.
5 db
11.0?
1000 26.
0 db
8 . t+?
C?~ ~ G. ~~f~ r~ B 1 `~
~ ~' ~i
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vG. The antenna (reflector and feed) must be detachable from the
rotator. (Ten minutes is expected time limit.)
~H. 100 knot winds and three inch ice conditions are climatic
design limits with salt spray corrosion protection.
vi. 1000 pounds maximum weight is understood to be realistic
for the antenna and rotator.
/J. Antenna continuously rotatable at the rate of 2 RPM with
positioning accuracies within fl?;.(plus or minus one degree.)
~K. The positioning should be a manually activated system with
power drive. The control assembly should contain the necessary switches
for on-off operation, clockwise - counter clockwise rotation, and an
azimuth indicator for instantaneous heading indication.
vl,. Beam gain patterns are re uested which will serve as a systems
test by using the GFE receiver The patterns requested should 25X1
be at the frequencies listed in Para 2F above unless the side lobes become
significant. If extensive side lobes exist, we request extensive testing
in that region. Also, if possible, a gain curve for the center lobe is
requested if the 150 to 1000 mes,band can be swept.
M.
r,-N.
Pattern studies at the site are not required.
Power for the rotator will be 115 volts 60 cycles.
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a s-~ ~c
~0.
The cube, weight, and exact delivery dates are requested as soon
as possible so space for sea shipment can be established.
P. Our most urgent request to assist in expediting this antenna is
to have detailed drawings for the rotator footings furnished as soon as
possible. In this way preparations for the installation can be started
and possibly finished prior to the arrival of the antenna at the operating
site.
3. The cost of this work should be char ed to allotment number 8- x+00-83-909
and for further details please contact OC-SP~EA, 25X1
Distribution:
Orig & 1 - Addressee
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Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-03330A004100070002-3