On 04/29/2015 06:09 AM, Tim wrote: > Tim: >>> With close distances, it's usually signal reflections, that mess up a >>> signal, rather than signal losses. The reflections can add together >>> in bad ways, and cancel out, or seriously mess up the signal. > > g: >> all of which can be decreased with a parabolic reflector for each >> antenna. > >>> You can also get signal overload causing strange things. >> >> which a parabolic reflector might cause. ;-) > > This blessing is cursed... ;-) > > I wonder if all off-the-shelf WiFi antennas are omnidirectional. > I've never actually needed to change my antenna.
not even. types include all sorts of; array beam, biconical, butterfly, cantenna, coaxial, corner reflector, dipole, discone, dish, helical beam, parabolic, yagi-uda beam. but the are not inexpensive. "home brew", aka, amateur radio, built directional antennas, covering above types, can be had at 20% and less of commercial. i have well over 100, if not over 200, bookmarks covering antennas of various frequencies and types, and how to build them. there are even pages on youtube that show how. my favorite is 'end fire' helical because it is easy to build, great gain, very directional, very good in multi array, left/right turn circular polarized, works well with omnidirectional when 'in sight'. something to remember about the 'standard' omnidirectional antenna that is supplied with most all wifi cards and routers, is the antenna if really nothing more than the proverbial "rubber ducky", which is a form of helical, but 'side fires'. they are inexpensive to make, short, and do not easily break. -- peace out. in a world with out fences, who needs gates. CentOS GNU/Linux 6.6 tc,hago. g . -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
