Active Monitoring Antenna
20 – 9000 MHz
Product Code: OMNI-A0258
VERSION: 1.3
SPECIFICATIONS:
Product code:
OMNI-A0258
OMNI-A0258-01
OMNI-A0258-02
Active antenna with single N-type
female connector
Active antenna with single N-type
female connector, with passive
bypass
Passive antenna with two N-type
female output connectors
Electrical:
VSWR (typ.)
Polarisation
RF power rating
Connector type
Input voltage (via coaxial cable.)
Input current
OP1dB (typ.) (in active mode)
OIP2 (typ.) (in active mode)
OIP3 (typ.) (in active mode)
Sensitivity
Band A: 20 – 1000 MHz
Band B: 1000 – 9000 MHz
See figures 1 & 2
360°
60°
Band A: ±1.5 dB
Band B: ±3.0 dB
< 2.5:1
Linear, vertical
Receive only
N-type female
13 – 24 VDC
< 150 mA
11 dBm
32 dBm
22 dBm
See figure 3
Mechanical:
Height
Weight
730 mm x 350 mm
< 8.5 kg
Frequency range*:
Gain
Nominal H-plane 3 dB beamwidth
Nominal E-plane 3 dB beamwidth
Azimuth ripple (RMS)
PRODUCT FEATURES:

Ultra wideband 20 to 9000 MHz

Protected against excessive field strengths

Very good sensitivity

Low profile compared to passive alternatives

Robust

IP63
APPLICATION AREAS:

General spectrum monitoring

Suitable for vehicle-mount and mast-mount
applications

Internal limiter allow operation in adverse EMC
environments
RELATED PRODUCTS:

MISC-A0080 power supply

OMNI-A0107 compact VP active monitoring
antenna

OMNI-A0156 HP active monitoring antenna
Environmental: designed to meet the following specifications
Operating temperature
-40 ºC to +65 ºC
Storage temperature
-55 ºC to +85 ºC
UV stability
Yes
Operational rainproof
Yes
Operational humidity
95% at +25 ºC and +55 ºC
Wind velocity (no ice)
180 km/h
Sand and dust resistant
Yes
10 Hz – 300 Hz: 0.01 g2/Hz
Vibration
300 Hz – 500 Hz: 0.03 g2/Hz
Mechanical shock
40 g @15 ms all axis
Indirect lightning survival
Yes
Salt fog
Yes. 47 ºC with 5% NaCl solution
* Bands A and B are internally combined
PRODUCT DESCRIPTION:
The OMNI-A0258 is a vertically polarised omni-directional antenna consisting
of an active antenna array, covering 20 to 9000 MHz. The antennas are
combined under a single compact radome and output either in a single (OMNIA0258/-01) or two (OMNI-A0258-02) connectors. In the active versions of the
antenna the active part protects the system from excessive field strengths and
boosts low level signals.
The active version of the antenna relies on DC power injection on the output
port of the antenna. The antenna is best utilised with the MISC-A0080 power
supply for this purpose.
The OMNI-A0258-01 features a passive-bypass mode which is engaged when
the antenna is not powered. In this mode, the antenna is completely passive,
allowing for low distortion measurements in the presence of high incident
fields.
The antenna features lightning protection measures against induced surges
on the RF feeder cables as well as ESD protection. The rugged design of the
antenna allows it to be deployed on vehicle platforms.
sales@alaris.co.za
Updated 2017-03-30
PAGE 1 of 3
www.alarisantennas.com
Alaris Antennas has a policy of continuous improvement and
hence specifications may change without notice
Active Monitoring Antenna
20 – 9000 MHz
Product Code: OMNI-A0258
VERSION: 1.3
GAIN:
Figure 1: Gain (linear frequency scale)
Figure 2: Gain (log frequency scale)
SENSITIVITY:
Figure 3: OMNI-A0258 E-field strength required for 12 dB NF receiver, 1 Hz bandwidth and 0 dB SNR (excludes external
noise in urban environment)
sales@alaris.co.za
Updated 2017-03-30
PAGE 2 of 3
www.alarisantennas.com
Alaris Antennas has a policy of continuous improvement and
hence specifications may change without notice
Active Monitoring Antenna
20 – 9000 MHz
Product Code: OMNI-A0258
VERSION: 1.3
PRODUCT DIMENSIONS:
sales@alaris.co.za
Updated 2017-03-30
PAGE 3 of 3
www.alarisantennas.com
Alaris Antennas has a policy of continuous improvement and
hence specifications may change without notice
Download PDF