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EMI, EMC
AND TEMPEST ANTENNAS
1.
PASSIVE CONICAL MONOPOLE, MODEL PCM-213/A
Model
PCM-213/A is a broadband passive conical monopole
antenna designed for transmit/receive applications, like
electric field strength measurement and surveillance
over the frequency range from 20 to 1300 MHz.
The conical monopole is linearly polarized and
produces omni directional radiation pattern, with a
nominal gain of 4 dBi in broadband mode (above
resonance) on a large ground plane.
SPECIFICATIONS
Frequency:
20 to 1300 MHz
Polarization:
Vertical
Directivity:
Omni-directional
Antenna
Factor:
See graph
VSWR:
3 : 1 average
RF
Connector:
Type “N” female
Height:
20”
Diameter:
34” at the top and 8” at the base
Weight:
5 lbs.
Finish:
Iridite finish
OPTIONS
·
Base
Plate
·
Radome
(Epoxy White)
2.
ACTIVE CONICAL MONOPOLE, MODEL ACM-310/A
Model
ACM-310/A is a broadband active conical monopole antenna
designed for receive applications only, like electric
field strength measurement, EMI, EMC and surveillance
over the frequency range from 30 to 1000 MHz.
The antenna provides excellent sensitivity at all
frequencies with in the frequency range of operation.
SPECIFICATIONS
Frequency:
30 to 1000 MHz
Power
Gain:
17.5 dBi +/- 1
Out
Put Impedance:
50 Ohms nominal
Preamplifier:
Gain:
14.5 +/- 1 dB
Noise
Figure:
3.5 dB max
1
dB Compression:
7 dBm
2nd
Order Intercept:
11.5 dB
3rd
Order Intercept:
7.0 dB
Power:
12 to 15 Volts at less than 25 milli Amperes
Note:
For other specifications please refer to Passive
Conical Monopole.
3.
SURVEILLANCE ANTENNA SYSTEM, MODEL
SAS-111/A
The
SAS-111/A is a portable broadband surveillance antenna
system designed for measurement of electric field
intensity, surveillance and receive applications from
100 Hz to 1 GHz. The
system consists of two separate antennas;
a monopole with a
small disc for the frequency range from 100 Hz to
80 MHz and a discone for the frequency range from 80 MHz
to 1 GHz. An
optional broadband combiner combines the signals from
the two antennas into a single output, the model number
for this antenna is SAS_111/SOP.
The
preamplifiers are powered by either the internal ac to
dc power supply module or rechargeable NI_CAD battery
pack.
The
antenna is provided with calibrated antenna factor
curve.
SPECIFICATIONS
Frequency:
100 Hz to 1GHz in two bands
Polarization:
Vertical
Pattern:
Omni-directional
Load
Impedance:
50 Ohms nominal
Antenna
Factor:
2.5 dB/m +/-1 dB from 10 KHz to 30 MHz
Below 10 KHz rolls off linearly to 40 dB at
100 Hz. Between 30 MHz to 15 Db at 1
GHz it varies from 4 dB at 30 MHz to 15Db
at 1 GHz
Sensitivity:
-12 dBV/m at 1 MHz, -15 dBV/m at 30
MHz, -18 dBV/m
at 300 MHz and –10
dBV/m at
1 GHz
1
dB Compression:
Varies from 0.1 to 0.5 Volts/meter
Power:
105 to 130 VAC, 50 to 60 Hz, 5 Watts.
24
hours use with rechargeable batteries when
fully charged
Output
Connector:
BNC female
Size:
34.5” high when deployed
Weight:
10 lbs.
Mounting:
Any tripod with ¼ -20 stud
OPTIONS
·
Single
output, Model SAS-111/SOP
·
Base
plate
·
Wooden
tripods
·
Radome
for mobile version with remote power supply, Model
SAS-11/MR
·
210
to 230 VAC operation
4.
ACTIVE ELECTRIC FIELD ANTENNA, MODEL
EFA-110/RBO
The
EFA-110/A is a calibrated active monopole receiving
antenna intended for use in measuring electric field up
to about 1 Volt/meter at frequencies from 100 Hz to 100
MHz. The
response is flat from 10 KHz to 70 MHz with an antenna
factor of 0 dB/meter.
The antenna has greater than –10 dB micro
Volt/meter sensitivity.
The
antenna operates from built in ac power supply or
rechargeable battery which charges when the antenna is
used on ac.
SPECIFICATIONS
Frequency:
100 Hz to 100MHz
Polarization:
Vertical
Output
Impedance:
50 Ohms nominal
Antenna
factor:
Nominally 0 dB/m
1
dB Compression:
1.0V/m
Sensitivity:
>-10 dBMV/m
RF
Connector:
BNC female
Size:
5”W x 7” L
Height:
1.0 Meter or 39 Inches
Weight:
<4 lbs.
Finish:
Gray color
OPTIONS
·
Operation
from External 12 to 15 Volts dc power supply, Model
EFA-230/A
·
Out
of door version, Model EFA-230/OD
·
Ground
plane 23” square
·
Radome
5.
MAGNETIC FIELD ANTENNA, MODEL MFA-110/A
Model
MFA-110/A is a calibrated untuned, magnetic field
sensing device designed for accurate measurement of
magnetic field intensity at frequencies from 100 Hz to
100 MHz. The
entire range is covered in a single band.
The
antenna is constructed using long ferrite rods, low
noise current amplifier and a balanced loop encircling
the ferrite rod. A
calibration port is provided to verify the antenna
function.
Typical
applications includes elementary direction finding of
ground waves and location of obscure noise sources in
addition to RFI, EMI and EMC.
SPECIFICATIONS
Frequency:
100 Hz to 100 MHz
Antenna
Factor:
Varies from +40 to –45 dBA/Vm
Polarization:
Senses H-field in direction of ferrite rod
Impedance:
50 Ohms nominal
Sensitivity:
Varies from +35 to –50 micro Ampere/meter
Dynamic
Range:
Nominal 115 dB from noise level to 1 dB
compression
Power:
105 – 130 VAC, 47-420 Hz, 5 Watts; contains AC
power supply and rechargeable batteries; 50 hours
operation on rechargeable batteries
RF
Connector:
BNC female
Size:
25” wide x 6” high x 5” deep
Weight:
15 lbs.; 30 lbs with case
Mounting:
Any tripod with ¼ -20 stud
OPTIONS
·
Tripod,
Model TP-1
·
Carrying
Case, Model CC-MFA
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