The UHF antenna is a loop vibrator for operation through a duplex filter on one feeder. His priorities: a wide operating band and an almost circular radiation pattern. The welded construction of the dipole eliminates the occurrence of intermodulation. By changing the distance from the active element to the mast, it is possible to correct its radiation pattern within a small range. The collapsible design makes it easy to mount and dismantle the antenna. The antenna has a reliable polymer coating that protects against aggressive environments and icing. All-metal construction provides reliable lightning protection. The UHF antenna is built on the principle of parallel addition of the powers of collinearly located 2 active loop vibrators.

Characteristics:

• Operating frequency range: 400 MHz - 490 MHz;
• SWR, not worse: 1.5;
• OMNI gain: 5.15 dBi;
• OFFSET gain: 8.15 dBi;
• Emission sector by -3 dB level in the vertical plane: 37 deg;
• Input impedance: 50 ohm;
• Power rating: 400W;
• Weight, kg: 3.5 kg;
• Assembled height, m: 2m;
• Antenna material: AD-31;
• Mast diameter: 35 mm;
• Permissible wind speed: 55 m/s;
• Wind resistance area: 0.0056 sq.m;
• Load at 45 m/s crosswind: 64 N;
• Permissible wind speed during icing (12 mm ice layer): 28 m/s;
• Operating temperature range: -50C to +50C
• Connector: N-type