The antenna AD-21/1318 is a wideband monopole for the frequency range from 130 to 180 MHz and it is primarily intended for use with portable and mobile radio devices. There is no need for tuning the antenna since the antenna broadband characteristics were achieved with a specially designed radiator with two concentrated loadings and with the appropriate antenna matching circuit placed above the antenna connector. The antenna is composed of a base with N male connector and of a radiating element with spring, made of stainless-steel.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.
Versions
Technical specification
| Frequency range | 130 - 180 MHz |
| Impedance | 50 ohm |
| VSWR | < 2 (diagram 1) |
| Gain | diagram 2 |
| Polarization | VERT. |
| Max. power | 50 W CW |
| Connector | N male |
| Height | 1025 mm |
| Weight - of antenna | 300g |
| Weight - magnet mount ADM-21/N | 850 g |
| Weight - fixed mount ADN-21/N | 200 g |
| Wind velocity | 180 km/h |
| Temperature range - in use | -40 ... + 70 oC |
