The antenna AD-55/A is the ultra-wideband manpack antenna intended for use with modern broadband software-defined radios (SDR) and other radio devices (jammers, scanners, etc.). The antenna is a sleeve dipole center fed design thus enable to work without the presence of the ground plane. The radiation part of the antenna is fully enclosed in a fiberglass radome. The antenna is also equipped with the spring element allowing the antenna to be always in a vertical position. The antenna construction is rugged and intended for use in the harshest military environments. The antenna connector is N male.
Technical specification
| Frequency range | 400 - 2800 MHz |
| Impedance | 50 ohms |
| VSWR | < 3:1 (see diagram) |
| Maximum power | 50 W CW |
| Polarization | Vertical |
| Gain | -4 ... +2 dBi (see diagram) |
| Radiation Pattern | omnidirectional |
| Connector | N male |
| Height | 433 mm |
| Weight | 530 g |
| Radome Diameter | 28 mm |
| Temperature range | - 40....+70 °C |
