AD-21/3512: wideband portable/mobile VHF/UHF monopole antenna (30 - 512 MHz)

The antenna AD-21/3512 is a wideband low-profile monopole mobile antenna covering frequency range from 30 to 512 MHz and is intended for use with portable and mobile radios. The antenna radiator is composed of two parts: the whip made of special strong and flexible stainless steel whip with spring at the bottom and the matching transformer unit above the N male coaxial connector. The radiator and the matching unit are painted with UV protective polyurethane black paint.
The antenna radiator could be used as a separate antenna attached to the portable radio device or it can be used with the magnet base ADM-21/N or fixed base ADN-21/N, both with the integrated coaxial cable length of 4 meters and ended with the FME female connector. Various adapters from FME to N, BNC, UHF, SMA, etc. are available on request. The VHF / UHF vehicle antenna is categorized also as handheld / manpack and signal jamming antenna.


wideband monopole antenna for portable radio devices with N male connector
antenna AD-21/3512-N with the fixed mount ADN-21/N for mobile applications
antenna AD-21/3512-N with the magnet mount ADM-21/N for mobile applications

Technical specification

Frequency range 30-512 MHz
Impedance 50 ohm
VSWR < 3.5 (see diagram)
Max. power 50 W CW
Gain -20 .... -2 dBi
Height 1225 mm
Radiator Weight 350 gr.
Magnet Base Weight  700 gr.
Fixed Base Weight 200 gr.
Cable length 4 m
Input connector FME female


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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