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.

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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
Input power	up to 1000 W
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

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

Area

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Full package includes:

Main technical characteristics:

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