I have a Subaru Forester Sport that I have a Tram 5.5" mag mount with a Browning UHF gain antenna that I have cut to 467 MHz. I have purchased direct mount to the roof but I want to drill once and be done. Question is when I place the mag mount in the middle in front of the shark fin by a few inches I get an SWR of 1.7 of higher. If I move it in between the shark fin and the side rails on passenger side it drops to 1.5 +/-. If I move it to the same spot on divers side I get about 1.3 +/-. The back of the vehicle does have a fiberglass/plastic cowling for rear window and more towards the front I have the "Moon Roof" as they call it. I do have a roof rack that I put on once in a while and with it on or off I did not notice any gain or loss in SWR when testing with it on the sides. The roof rack rail in attached picture in the back I have moved forward and all the way back and it did not really affect the reading. I.e. 1.52 vs 1.56.
Any thoughts as to why it is lower on the drivers side vs center? Attached is a screen shot of my roof. Side note the passenger side black rectangle that looks like it is on roof rack it the thumb screw for 360 camera mount.
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WSEZ903
I have a Subaru Forester Sport that I have a Tram 5.5" mag mount with a Browning UHF gain antenna that I have cut to 467 MHz. I have purchased direct mount to the roof but I want to drill once and be done. Question is when I place the mag mount in the middle in front of the shark fin by a few inches I get an SWR of 1.7 of higher. If I move it in between the shark fin and the side rails on passenger side it drops to 1.5 +/-. If I move it to the same spot on divers side I get about 1.3 +/-. The back of the vehicle does have a fiberglass/plastic cowling for rear window and more towards the front I have the "Moon Roof" as they call it. I do have a roof rack that I put on once in a while and with it on or off I did not notice any gain or loss in SWR when testing with it on the sides. The roof rack rail in attached picture in the back I have moved forward and all the way back and it did not really affect the reading. I.e. 1.52 vs 1.56.
Any thoughts as to why it is lower on the drivers side vs center? Attached is a screen shot of my roof. Side note the passenger side black rectangle that looks like it is on roof rack it the thumb screw for 360 camera mount.
Mis spelled word.
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