This product comes from Alaris Antennas catalogues

Marine Active Monitoring Antenna

OMNI-A0205
Active

This vertically polarised omni-directional antenna consists of an active antenna array, covering 20 to 6000 MHz. The antennas are combined under 1 compact radome and output in either a single (OMNI-A0205-01) or two connectors (OMNI-A0205-02). The active part of the antenna protects the system from excessive field strengths and boosts low level signals.brThe active version of this antenna relies on DC power injection on the output port of the antenna. The antenna is best utilised with the MISC-A0022 power supply for this purpose. The OMNI-A0205-01 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.brBased on the OMNI-A0098, the antenna is mechanically hardened to withstand the harsh environments experienced in maritime applications.

Additional information

Specifications

Frequency range Band A: 20 - 1000 MHz Band B: 1000 - 6000 MHz
Gain -48
Nominal H-plane 3 dB beamwidt 360°
Nominal E-plane 3 dB beamwidth 60°
Azimuth ripple (RMS) Band A: ±1.5 dB Band B: ±2.5 dB
VSWR (typ.) < 2:1
Polarisation Linear
RF power rating Receive only
Input voltage (via coaxial cable.) 13 - 24 VDC
Input current < 150 mA
OP1dB (typ.) (in active mode) 11 dBm
OIP2 (typ.) (in active mode) 31 dBm
OIP3 (typ.) (in active mode) 21 dBm
OMNI-A0205-01 active/passive mode switching cycles. Min 106 (at 20 cpm)
Switching speed < 5 ms

    Product Applications

    Spectrum Management
  • Spectrum Monitoring
  • Radio Direction Finding
  • Signals Intelligence

    Design Features

  • Ultra wideband 20 to 6000 MHzbrProtected against excessive field strengthsbrVery good sensitivitybrLow profile compared to passive alternativesbrRobust