AD-18/D3: wideband mobile VHF monopole antenna, 20 - 88 MHz (3.4 m)

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.


VHF antenna with N female connector
Combined VHF (N female) and GPS L1 (SMA female) antenna
VHF antenna with BNC female connector
Combined VHF (BNC female) and GPS L1 (SMA female) antenna

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

Contact us


TRIVAL ANTENE d.o.o., Gorenjska cesta 25, 1234 Menges, SLOVENIA, EU
TEL: +386-1-8314-396, FAX: +386-1-8313-377, EMAIL:

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