DIRECTION FINDING ANTENNAS
Direction finding antennas are capable of measuring the direction from which a received signal was transmitted. This direction information can be utilized to determine the location of transmission (via angle of arrival estimation, for example). The applications for direction finding are varied and important: navigation, search and rescue, interference identification, signals intelligence, and more. Examples of direction finding antenna equipment are listed below.
MANPACK DIRECTION FINDING ANTENNAS
Manpack direction finding provides the ultimate portability in a DF system. The DF-A0257 is a wideband DF antenna intended for on-the-move direction finding from 20 to 6000 MHz. Implemented as a three-band vertical stack, the low frequency band is enhanced with patented hybrid loop-Adcock technology to provide improved sensitivity vs. traditional designs.
The antenna outputs patterns suitable for the Watson Watt estimation method, as well as 3-channel correlative interferometry using its integrated band switch and control electronics. External and internal RF chain calibration is provided along with a digital compass or INS chip and active GPS antenna.
Click part number for datasheet:
20-6000 MHz Manpack DF Antenna with integrated electronics: DF-A0257
400-6000 MHz Manpack DF Antenna with integrated electronics: DF-A0254
20-6000 MHz Manpack DF Antenna: DF-A0201
1-88 MHz Manpack DF Antenna (with integrated electronics -01): DF-A0114
FIXED-SITE, MARITIME OR VEHICLE DIRECTION FINDING
This comprehensive monitoring and direction finding antenna system covers MF to S or C band using a loop array for good DF performance at low frequencies and pentagonal wideband dipole and monopole arrays for upper frequency ranges. Secondary pentagonal arrays are combined produce omnidirectional coverage up to 6 GHz, and an optional HF whip on top of the antenna provides a sensitive omni for lower frequencies.
Lightweight mast mount, and vehicle versions are available, as well as a maritime direction finding model with more robust mechanical and environmental protections.
Click part number for datasheet:
20-6000 MHz Vehicle Adcock DF with electronics: DF-A0111
1-3600 MHz Vehicle or Mast: DF-A0029 Naval: DF-A0037
Switch Unit: DF-A0056, commutating: DF-A0052
Monitoring whip 9 kHz-700 MHz:MONO-A0059, 2-6 GHz: OMNI-0157
1-6000 MHz Vehicle or Mast: DF-A0095 Naval: DF-A0088
Switch Unit: DF-A0054
Monitoring whip 9 kHz-700 MHz:MONO-A0059
WIDEBAND PORTABLE WIRE DF ANTENNA
Collapsible to a 44 pound, 66x16x10 inch volume, this high sensitivity portable direction finding antenna system covers 20 to 3600 MHz. Two-channel receivers with phase-sensitive correlative interferometry are ideal for use with this array. An optional whip can be attached on top for omnidirectional HF monitoring.
Click part number for datasheet:
20-3600 MHz: DF-A0031
Switch unit: DF-A0056
VLF LF MF HF DIRECTION FINDING ANTENNAS AND ARRAYS
HF DF is enjoying a renaissance. Join the revolution with our high frequency DF antenna and array solutions. Tactically deployable single structure HF antenna elements and arrays can be used for receiving and locating LHCP, RHCP and vertically polarized signals. When stowed, the tactical antennas collapse into a very small form factor for easy transportation and storage.
HF radio direction finding arrays of active monopoles are also offered for more permanent installations.
Click part number for datasheet:
1-30 MHz Tactical HF, NVIS DF Element: DF-A0049
1-30 MHz High Sensitivity HF, NVIS DF Element: DF-A0016
1-30 MHz Strategic HF, NVIS DF Element: DF-A0115
1-30 MHz HF Tactical DF Antenna for WW or CIDF: DF-A0048
0.009-1 MHz VLF LF MF Tactical DF Antenna for WW: DF-A0097
0.009-30 MHz Active Monopole: MONO-A0071
0.5-30 MHz HF DF 9 or 17 Element Array: DF-A0015, DF-A0076
INTEGRATED DIRECTION FINDING ARRAYS
A variety of mast mountable, fixed site and tactical wideband direction finding antenna arrays are available covering 20 - 3600 MHz. Designed for two-channel phase-sensitive receivers, correlative interferometer algorithms yield typical angle of arrival uncertainty of about one degree in azimuth.
Click part number for datasheet:
20-410 MHz: DF-A0122
20-1300 MHz: DF-A0068
20-3600 MHz: DF-A0001
for two channel receivers: DF-A0007
20-3000 MHz: DF-A0038
20-6000 MHz: DF-A0038-01
20-6000 MHz: DF-A0062
1000-3000 MHz: DF-A0020
HANDHELD DIRECTION FINDING ANTENNA
The DF-A0047 is a handheld wideband antenna for direction finding and transmitter hunting in the 20 to 8500 MHz band. Combining several antennas in a neat housing along with integrated electronics makes it quite effective when used in conjunction with signal analyzers. A single RF output is provided, with internal switching to select the appropriate antenna and whether to connect or bypass the low-noise wideband amplifier to enhances system sensitivity when in active mode. In passive mode, the amplifier is bypassed so that the antenna can be used in the presence of strong signals.
Version DF-A0047-01 includes an attachable loop antenna with a diameter of 300 mm for 9 kHz to 20 MHz direction finding.
Click part number for datasheet:
20-8500 MHz DF Antenna: DF-A0047
0.009-8500 MHz DF Antenna: DF-A0047-01