Com-Power AB-900 User Manual
Features
Broadband - 30 MHz to 300 MHz
Transmit and receive capability
Individual calibration
Two year warranty
Biconical Antenna
AB-900
Description
The AB-900 is a linearly polarized broadband Biconical antenna specifi cally designed for EMC testing. It
has a frequency range of 30- 300 MHz. This antenna
can be used for both emissions and immunity testing.
For immunity testing, the AB-900 antenna has a balun
that is capable of accepting up to 50 Watts at its input
terminals to generate electromagnetic fi elds.
These antennas are individually calibrated using procedures described in ANSI 63.4. The calibration data
is shipped with the antenna to maximize measurement
accuracy.
Both antenna models have the same mounting base,
with a 1/4 inch x 20 threaded hole. It can be mounted
on a Com-Power AT-100 tripod or any other antenna
tripod with matching threads.
Application
Biconical antennas are used for emissions and immunity testing to meet various EMC standards specifi ed
by FCC, CISPR and EN. The broadband characteristics of the biconical antenna make it a good choice
for making sweep measurements and for automated
measurement systems.
Normally, tuned dipole antennas are used for EMC site
attenuation measurements for better accuracy. However, the biconical antenna is easier to use for vertical
site attenuation measurements, because of the long
dipole element lengths at lower frequencies (5 meters
at 30 MHz). According to ANSI 63.4 specifi cation, a
calibrated biconical and a log periodic antenna can be
used for site attenuation measurements.
The calibration data provided with each antenna is
used to calculate fi eld strength measured for the se-
lected frequency. The antenna factor (dB/m) for the
selected frequency is added to the measured output
(dBV) displayed by the EMI meter to obtain fi eld
strength (dBV/m).
Com-Power Corporation (714) 528 - 8800 www. com-power.com sales@com-power.com
Specifi cations
Frequency Range: 30 MHz-300 MHz
Polarization: Linear
Power handling: 50 Watts continuous
Impedance: 50 Ω
Connector: BNC (f)
Weight: 7 lbs. (3.5 kg) max.
Size: (L x W) 28.75" x 52.75" (73 cm x 134 cm)
T ypical Antenna Factors:
Field strength (dBV/m) = Output measured (dBV) + Antenna Factor (dB/m)
Mechanical Outline:
20.5"
23.75"
52.75"
28.75"
Values are typical values unless specifi ed.
Dimensions are given in inches.
All specifactions are subject to change without notice.
Com-Power Corporation 114 Olinda Drive, Brea, California 92823 (714) 528 - 8800 www.com-power.com
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