AD-18/D: wideband mobile VHF monopole antenna, 30 - 90 MHz

The antenna AD-18/D is a wideband mobile VHF antenna for frequency range from 30 to 90 MHZ, mainly intended for use in heavy duty mobile applications. The antenna is composed of three main parts: antenna base, lower and upper radiating element. The antenna base is made of aluminum and durable plastic materials. Inside the base is 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 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. Different base plate dimensions are available on request. The antenna radiator is painted with military green (RAL-6014) two-component UV resistant paint.


Antenna with N female input connector.
Antenna with N female input connector and active GPS L1 antenna inside the antenna base.
Antenna with BNC female input connector.
Antenna with BNC female input connector and active GPS L1 antenna inside the antenna base.

Technical specification

Elektrical specifications - VHF/UHF  
Freqvency range 30 - 90 MHz
Impedance 50 ohm
VSWR < 3.5
Gain typ. -5 ... +0.5 dB (1/4)
Polarization VERT.
Max. power 150 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 End-fed (UHF); patch antena z LNA (GPS)
Height 2.775 m
Weight 3.5 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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