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Direction Finding and Monitoring Antenna


The DF-A0136 direction finding antenna covers a frequency range of 20 MHz to 8 GHz. A separate, but fully integrated active monitoring antenna gives high sensitivity omni-directional coverage on the same axis as the DF antenna, without interfering with the DF array. The full-size elements on all bands give excellent DF sensitivity. Ultimate angular resolution for strong signals is well under 1° for most of the frequency range. Dipole elements provide good cross-polarisation rejection, and fair performance for signals arriving from up to 15° above or below the horison. The integrated monitoring antenna is in two bands, mounted above the Band C & D DF antenna module housed in the radome. Each band of the monitoring array is amplified at the top of the cable, and passively combined to give continuous coverage over the frequency range 20 MHz to 9 GHz, with a single output connector. This DF antenna is designed to be usable with either a 5- or 2-channel phase-sensitive receiver and correlative algorithm. Characterisation of the antenna can be performed on request.

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DF frequency range Band A: 20 - 300 MHz; Band B: 300 - 1000 MHz; Band C: 1000 - 3000 MHz; Band D: 3000 - 8000 MHz
Nominal input impedance 50 O
Antenna type 5-element DF interferometer (From 5- to 2-channel receiver compatible)
Polarisation Vertical
Output cables RG 400 cables
DF connectors 20 x TNC male
Monitoring connector 1 x N male
Frequency range 20 - 9000 MHz
Nominal H-plane beamwidth 360°
Nominal E-plane beamwidth 60°
Typical VSWR* 0
Polarisation Vertical
Connector type N-type male
Nominal impedance 50 O
Input voltage (via coax)* 13 - 24 V DC

    Product Applications

    Signals Intelligence
  • Radio Direction Finding
  • C-ESM

    Design Features

  • Full-size DF Wideband DF 5-element interferometer Optimised for 2-channel receivers High sensitivity omni antenna integrated Rapid deploy/stow design with integrated dust caps MECHANICAL FEATURES: Designed for tower-mounting