Mirage/KLM JV440X Vertical Antenna
420-470 MHz, so called J-stick or J-pole antenna. The gain is 7dBd over ground plane. DC short circuit in feed point makes silent band on low noise level. It protects well your equipment of damage by high voltage lightning. Feed is 50 ohm and SWR is under 1:1.5.
JV440X J antenna. DC short circuit in feed poin makes it silen low noise antenna as well protects you transceiver of damage by llightning.