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Showing results for tags 'omnidirctional'.
We have a 40w Motorola repeater and I've got an ANLI-100 antenna about 15' over the house, connected with 50' of LMR400 cable. It's on a metal roof, the house is at about 3000' ASL. In the immediate valley, pretty much with 'line of sight' - but with dense foliage, they're around 2200'. I haven't measured SWR, do not have a SWR meter, but I think it should be close enough to work even considering the line loss and slightly out-of-band from ham dual band VHF/UHF antenna. When I first got repeater, in the winter time, without leaves on most trees, It worked well and as expected. I could go about 4-5 miles away... Now, in the summer, with very dense foliage, I can hardly make it a few hundred feet away! There is both a very steep elevation change, as this location is in mountainous area, and very very dense foliage. In my research, it seems that a "circular polarized omnidirectional" antenna has been tested and used successfully by Motorola - a long time ago - with use in UHF frequencies. I'm looking to see if anyone has experience building an antenna like one of these "cycloid dipole" antennas for the GMRS frequencies? https://ka7oei.blogspot.com/2013/08/a-circularly-polarized-omnidirectional.html http://www.wa7x.com/cycloid_info.html Anyone have helpful thoughts on if this would improve reception for me, in the foliage?