Planar Log-Periodic Antenna (AX-31C)



In stock

SKU: AX-31C Category:


The AX-31C antenna is a compact VHF/UHF log-periodic directional antenna, a successor to the popular AX-31B antenna, with improved performance and reduced weight and dimensions, as well as additional packaging options: an outdoor mounting version and a hand-held one. This antenna is constructed on a high-quality fibre-glass substrate, with an integrated low noise amplifier. The user can also specify antenna versions without the inbuilt amplifier, which does not require any power to operate. Versions without the amplifier can be also used as low power transmit antennas.

The AX-31C antenna covers a frequency range of 290 to 2200 MHz (a wider frequency range can be still received with reduced gain) and is ideally suited for reception of point-to-point communications where its directional characteristics can significantly improve rejection of interfering signals. The directionality is especially significant above 400 MHz; under 400 MHz the directionality gradually declines to the point when the antenna acts as a non-directional dipole.

While designed to be entirely general-purpose and performing well with any third-party equipment, the WiNRADiO AX-31C antenna is especially suitable for WiNRADiO G3 Series of VHF/UHF receivers, in both professional and consumer applications.

Technical Specifications
•Type: Log-Periodic Dipole Array
•Frequency Range: 290 to 2200 MHz
•Antenna Forward Gain: 5.0 dBi @ 950 MHz
•Amplifier Gain: (AX-31C, AX-31CP, AX-31CH and AX-31CM only) 26 dB @ 500 MHz, 19 dB @ 1950 MHz
•Amplifier Noise Figure: 1.8 dB
•Amplifier IP3: +26 dBm
•Primary Sensitivity: E-field
•Polarization: Horizontal or vertical (depending on mounting)
•Usage: AX-31C, AX-31CP, AX-31CH, AX-31CM: Receive only
AX-31CX, AX-31CHX, AX-31CMX: Receive and transmit
•Transmit Power: 5 W max (AX-31CX, AX-31CHX, AX-31CMX only)
•Impedance: 50 ohm (typ.)
•Power: AX-31C: 9V (PP3 type battery) @ 42 mA, AX-31CP, AX-31CH, AX-31CM: 12V DC @ 60 mA
•Connector: SMA
•Front-to-Back Ratio: 20 dB min above 600 MHz, 5 dB @ 430 MHz
•VSWR: 1.7:1
•Size: AX-31C, AX-31CP: 292 x 217 mm (11.5″ x 8.5″), AX-31CH, AX-31CM: 300 x 248 mm (11.8″ x 9.7″) (excluding handle or mounting bracket)
•Weight: AX-31C: 155 g (5.5 oz), AX-31CP: 150 g (5.3 oz), AX-31CH: 720 g (25.4 oz), AX-31CM: 1100 g (38.8 oz)

Specifications are subject to change without notice due to continuous product development and improvement.