HF antennas of quasi-zenith radiation for short-range communication

HF antennas of quasi-zenith radiation for short-range communication

HF antennas of quasi-zenith radiation for short-range communication

 VNPU HF is a NVIS nondirectional antenna providing communication via ionospheric wave for distance up to 300 km.

Its modification - 2VNPU allows for HF radio communication both in circular zone up to 300 km and in sector zone (60° wide) for distances up to 750 km.


Area

Full package includes:

·        mast support;

·        additional racks;

·        antenna wires;

·        rigging for wire suspension;

·        resistive load;

·        lightning protection system;

·        SPTA;

·        transforming matching device (TMD);

·        set of light-shielding installation (masts are ordered separately).

Main technical characteristics:

Operating frequency range

Operation modes
2-12 MHz

Rx and Tx
Inout power up to 1000 W
Operation modes Receiving or transmission а
Allowable power of radio transmitting set up to 1000 W
Input impedance
– without static converte
– with static converte

600 Ω (symmetrical)
50/600 - 50 Ω (asymmetrical)
SWR Less than 3
Connection to the radio via static converter (RF cable 50 Ω)
Radiation characteristics:
- gain
- polarization

1,0 … 4,0 dBi
horizontal
Operation conditions:
- max. wind speed


- operating temperature range

up to 40 m/s without ice deposit
up to 20 m/s with ice deposit up to 10 mm

from – 50 to + 55°С