This product comes from Alaris Antennas catalogues

HF Active Monopole


The HF active whip monopole antenna is designed for mounting on vehicles and other metallic structures. The antennas’ radiation pattern is suitable for medium to long range HF monitoring. This antenna uses an operational amplifier as the active component of the antenna which operates from 8 kHz to 88 MHz.The product features a passive bypass mode which comes into operation when the antenna is powered down. In this mode, the active matching and amplification circuitry is bypassed and the antenna operates as a completely passive receiving antenna. The antenna features an integrated filter to suppress transmissions in the FM broadcast band from 88 to 107 MHz

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Frequency range 8 kHz - 88 MHz
Nominal input impedance 50 Ω
Nominal input impedance 50 Ω
H-plane 3 dB beamwidth 360°
Polarisation Vertical
Sensitivity in 1 Hz bandwidth 1µV/m
OP1 18 dBm
OIP2 43 dBm
OIP3 37 dBm
Length Base diameter
Base diameter 150 mm
Weight 4 kg
Mounting method 6 mm x 6 mm holes, PCD - 115 mm
MTBF > 50000 hours
Electrical grounding M6 Grounding stud

    Product Applications

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

    Design Features

  • 8 kHz to 88 MHz frequency range Antenna impedance is 50 ? Rugged Quick deployment time Compact Glass fibre insulated radiator Lightning induced surge and static protection Passive bypass mode option