The antenna AD-18/CF-2512-LW is a "center-fed" type mobile VHF/UHF antenna for the frequency range from 20-512 MHz, mainly intended for use in heavy-duty mobile applications. The antenna is designed as dipole in both VHF and UHF bands and does not require any ground plane, so the electrical performance (GAIN and VSWR) of the antenna are always the same. This specific antenna design allows various types of mounting.
The antenna is composed of three main parts: antenna base, lower, and upper radiating element. Both radiating elements are made of composite materials that enable outstanding strength and roughness even in the hardest conditions of use. The antenna radiator is painted with military green (RAL-6014) two-component UV-resistant paint. Other colors and connectors are available on request.
The vehicle antenna base is made of aluminum and durable plastic materials, optionally with integrated GPS L1 or L1/L2. A strong stainless steel spring absorbs the shocks and vibrations and protects the antenna against impacts. The vehicle antenna base has NATO standard four mounting holes equally spaced on a 4.5" (114.3 mm) circle.
The mast antenna base is made of two stainless steel joints and a hard polyester tube with an outer diameter of 42.7 mm. The tube is equipped with special mounting console adapters which can be installed on poles up to 60 mm in diameter.
Versions
Technical specification
ELECTRICALSPECS.: | |
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Frequency range | 20 - 512 MHz |
Impedance | 50 ohms |
VSWR | < 3 |
Gain | See diagram |
Polarization | Linear Vertical |
Radiation Pattern | Omnidirectional |
Maximum power | 75 W CW avg.; 100 W max. |
Connector | N female |
Electrical specifications GPS |
|
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Frequency range | L1 1575.42 +/- 10 MHz or L1/L2 1575/1227 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. | <1.35 dB |
Connector | SMA female |
Mechanical specifications | |
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Design |
Center-fed dipole (VHF); Center-fed dipole (UHF); patch antenna with LNA (GPS) |
Height - vehicle | 2.65 m |
Height - mast | 2.69 m |
Weight - vehicle | 3.95 kg |
Weight - mast | 3.9 kg |
Max. high voltage rating | 16 kV |
Temp. range - in use | -50 ... +55 °C |
Temp. range - in stock | -55 ... +75 °C |
Wind velocity | 45 m/s (160 km/h) |
Color | MIL Green |