AD-27/DB-3512-S: Short Dual-Band Mobile antenna VHF Monopole/ UHF Dipole, 30-108 & 225-512 MHz (h < 2 m)

The antenna AD-27/DB-3512-S is a dual-band monopole/dipole mobile antenna intended for use in heavy-duty mobile applications. The antenna is covering a frequency range from 30 to 108 MHz and from 225 to 512 MHz. Due to the special monopole design in the radiator, the ground for the VHF is not needed. That way the antenna can be also installed on a mast. The antenna is composed of two main parts: an antenna base and a radiating element. The antenna base is made of aluminum and durable plastic materials. Stainless steel spring absorbs the shocks and the vibrations, in addition, protect the antenna against impacts. The antenna base has built-in surge protection. The radiating element is made of composite materials that 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. Other colors are available on request.


VHF/UHF antenna with N female connector
Combined VHF/UHF (N female) and GPS L1 (SMA female) antenna
Combined VHF/UHF (N female) and GPS L1/L2 (SMA female) antenna

Technical specification

Electrical specifications VHF/UHF

Frequency range 30 - 108 MHz & 225 - 512 MHz
Impedance 50 ohms
VSWR < 3
Gain -10 .. +1 dBi (VHF) & -1 .. +3 dBi (UHF)
Polarization  Linear Vertical
Radiation Pattern Omnidirectional
Maximum power 100 W CW
Connector N female or BNC female

Electrical specifications GPS

Frequency range L1 1575.42 +/- 10 MHZ or L1/L2 1575/1227 MHz
Impedance 50 ohms
VSWR < 2
Polarization RHC

Gain (LNA)



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 (30 - 108 MHz) & Dipole (225 - 512 MHz)
Height 1980 mm
Weight 4 kg
Max. high voltage rating 16 kV
Wind rating 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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