The DF-A0048-01 is a compact, stationary and transportable HF direction finding antenna designed for DF systems using the WatsonWatt estimation method, as well as 3-channel correlative DF. Included with the antenna is an integrated quad-pod, a carry bag and guy ropes. The antenna consists of two identical loop antennas arranged in a “crossed-loop" configuration, with a large diameter of 1.6 m to achieve a high sensitivity. The loops make use of Alaris’ innovative and patented cross-polarisation cancelling technology that eliminates disturbances due to cross-polarisation from on-horizon sources. This offers enhanced, reliable accuracy in real-world applications and field trials over traditional crossed-loop designs. In addition to the loops, the DF-A0048-01 provides an omni-directional sense signal that can be used for monitoring and resolving the 180-degree angle of arrival ambiguity that is inherent in crossed-loop type DF antennas. The antenna is made from lightweight materials and designed to be collapsible for quick, easy and repetitive deployment and stowing in a harsh field environment. The product is unique in that it features a fully integrated quadpod for rapid field deployment but can also be bolted to a plinth for semi-permanent installations. When stowed, the antenna collapses into a very small form factor for easy transportation and storage.
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Frequency range | 1 - 30 MHz |
Channels | 3 (including omni) |
DF method | Watson-Watt or 3-channel CDF |
RMS accuracy | < 3 ° RMS |
Polarisation | Vertical |
Omni pattern ripple | < 3 dB RMS |
VSWR | < 5:1 (over 90% of the band) |
Nominal impedance | 50 O |
Connector | 3 x N-type female |
Power handling | Receive only |
ESD protection | All metal parts are grounded |
Dimensions deployed | Ø 1560 mm diameter 2675 mm height 7260 mm guy rope distance |
Dimension stowed (l x w x h) | 1320 x 380 x 300 mm |
Total mass | < 16 kg |
Colour | Black |