The antenna AD-18/D3 is a wideband mobile VHF antenna for a frequency range from 20 to 88 MHz, mainly intended for use in heavy-duty mobile applications. The antenna is composed of four main parts: antenna base, lower, middle and upper radiating element. The antenna base is made of aluminum and durable plastic materials. Inside the base are the matching circuitry and (optional) GPS antenna. Stainless steel spring absorbs the shocks and the vibrations, in addition, protects the antenna against impacts. Both radiating elements are made of composite materials enable outstanding strength and roughness even in the hardest conditions of use. The antenna base has four mounting holes equally spaced on a 4.5" (114.3 mm) circle which complies with NATO standard.
The antenna radiator is painted with military green (RAL-6014) two-component UV resistant paint.
Versions
Technical specification
| Electrical specifications - VHF | |
|---|---|
| Frequency range | 20 - 88 MHz |
| Impedance | 50 ohm |
| VSWR | < 3.5 |
| Gain | see diagram in the datasheet |
| Polarization | VERT. |
| Max. power | 100 W CW |
| Connector | N female (BNC female optional) |
| Electrical specifications - GPS | |
|---|---|
| Frequency range | L1 1575.42 +/- 10 MHz |
| Impedance | 50 ohm |
| VSWR | < 2 |
| Polarization | RHC |
|
LNA Gain / Voltage / Current
|
18 dB (+/- 2 dB) / 5 V / 19 mA 16 dB (+/- 2 dB) / 3.5 V / 13 mA 10 dB (+/- 2 dB) / 2 V / 7 mA |
| Noise fig. | <1.5 dB |
| Connector | SMA female |
| Mechanical specifications | |
|---|---|
| Design | Monopole 20 - 88 MHz |
| Height | 3.4 m |
| Weight | 3.1 kg |
| Max. high voltage rating | 16 kV |
| Temp. range - in use | -50 ... +55 oC |
| Temp. range - in stock | -55 ... +75 oC |
| Wind velocity | 45 m/s (160 km/h) |
| Color | MIL Green |
