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various antenna models used for radio telemetry animal tracking


view of a null-peak antenna system used for radio telemetry wildlife tracking

Null-Peak Antenna Systems

ATS Part Number Frequency Range
150.000 - 154.500 MHz
154.000 - 158.500 MHz
158.000 - 162.500 MHz

Null-Peak Antenna Systems

Note: this product is temporarily unavailable in the quote builder. Please contact ATS directly to order.

Complete system includes a pair of 4 element Yagi Antennas, switchbox, cables, and mounting kit.


  • Doubles the antenna gain to increase your field range.
  • User supplies steel or aluminum horizontal spacer pipe, and vertical mast pipe.
  • Compass Rose is available, PN 12908.

Standard Package Includes:

Each complete Antenna System includes a pair of 4 element Yagi antennas, either a switchbox (null-peak) or hybrid signal splitter (null or peak), cabling up to a 8m (25 ft) run, and an antenna mounting kit.

User will need to supply the horizontal spacer pipe, minimum 5 feet in length, and vertical antenna mast pipe. A CAD drawing of the system is available here.

Antenna Specs

Isotropic: 7.7 dBi, Dipole: 5.6 dBi
Half power width
Horizontal-plane: 59°, Vertical-plane: 95°
Folded dimensions
85.1x10.2x4.4 cm (33.5x4x1.75 in.)
0.54 kg (1.2 lb) to 0.71 kg (1.6 lb)
Range of Ant Height
76 cm (30 in.) to 81 cm (32 in.) (For 141-175 MHz)
Range of Ant Length
106 cm (42 in.) to 86 cm (34 in.) (For 141-175 MHz)

Quick Antenna Tips

There are two basic antenna types: directional and non-directional (omni-directional). Directional antennas are typically Yagi type, non-directional are dipole type.

The reception pattern of a directional type antenna is shown below, left. The pattern for an omni-directional antenna is shown on the right.

view of the directional pattern of a yagi antenna used for radio telemetry wildlife tracking view of the omni-directional pattern of a yagi antenna used for radio telemetry wildlife tracking
  • The more elements on the antenna, the better the gain and effective range (they are also less portable!).
  • VHF systems are line of sight; the higher the antenna is above the ground, the better the range.
  • All ATS antennas include a standard length coaxial cable; longer lengths are available.

We offer a complete line of antennas for radio tracking; we can give you advice if you’re not sure what kind to use.


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