Hi. I have this plane (photo) with RAMI VHF antenna mounted on top. Antenna is mounted to grounded (connected do frame) cooper plate. Antenna is solid-statne (not tuneable). The problem is. Last time I saw that I have a little bit low range. Second, when I was in my friend aerodrome with 118,875 frequency i saw that I can't transmit because I have interferences in my headsets. I checked the antenna. On 122.300 i have SWR=1:2,5 on 136,900 i have 1:1,5 and on 118.000 i have 1:3 !! I cleaned all groundings, no effect. I replaced my antenna for COM antenna from beechcraft. Still I have high SWR. I replaces antenna cable (h155) - no difference. I tried another radio, no effect. Why solid-state antennas on my plane don't work?