I nosed around the Internet looking at the various designs of stripline dividers. It is almost trivial to make one. But the more I think about it, if I am going to coordinate a climb to hang a pair of antennae, I'd probably just carry two radios up and run them separate and sectorized.
If both feeds are exactly the same, half the power would go to each. Receive should be symmetrical, and only slightly attenuated from a single antenna deployment. But, a point of failure, and may be false economy. Mike At 02:13 PM 10/29/2009, you wrote: >There are several manufacturers like IF Engineering, Meca, RF Lamda, and >such of quality combiner/dividers, but pretty much any RF Design group >that manufactures quality hybrid stripline dividers would probably work. >These are typically better than using something like a "T" to >split/combine signals. What you want is something with low insertion >loss and at least 20 dB of isolation between ports. > >Cameron > > >Mike wrote: > > Cameron: > > > > Your prowess as an antenna designer is well known. Define a decent > > splitter, and where one might find one. I think that solution would > > be usable to a wide group on this list. > > > > Mike > > > > > > At 12:05 PM 10/29/2009, you wrote: > > > >> That is not really an omni. It is three sectors meant to be fed with > >> three different radios. That being said, and in regard to my last post, > >> a back to back array with a couple of 90's fed correctly would yield a > >> pretty nice "omni" pattern that you could get close to 16 dB. Two 18 dB > >> sectors with a decent splitter would yield a 15 dB omni. It would just > >> be pretty "big" as far as antennas go. > >> > >> Cameron > >> > >> Michael Baird wrote: > >> > >>> What about sectorized omni arrays, any of those out there at 5.8? > >>> > >>> An example would be > >>> http://www.netkrom.com/prod_ant_5.1-5.8ghz_vpol_sector_omni.html > >>> > >>> Just can't find anybody who sells it to get an idea on pricing. > >>> > >>> Regards > >>> Michael Baird > >>> > >>> > >>>> You won't find a 5 GHz omni at that gain, and if you do, I'd call BS. > >>>> The vertical beamwidth on an 16dB omni antenna at almost any frequency > >>>> will be so flat that the antenna would be practically useless. We make a > >>>> 9-10dB 5.7-5.8 H-pol omni for ourselves, but very few as we just don't > >>>> use that many. If you need H-pol, hit me offlist. Otherwise, there are > >>>> plenty of good 5 GHz 9 and 10 dB V-pol omni's commercially available. > >>>> > >>>> Cameron > >>>> > >>>> Michael Baird wrote: > >>>> > >>>> > >>>> > >>>>> Tom, > >>>>> > >>>>> This would not be serving any customers, all the locations will be at > >>>>> least 100ft+. > >>>>> > >>>>> Regards > >>>>> Michael Baird > >>>>> > >>>>> > >>>>> > >>>>> > >>>>>> I'd be cautious about those Pancake shaped OMNI patterns at 16 DB. > >>>>>> > >>>>>> Tom DeReggi > >>>>>> RapidDSL & Wireless, Inc > >>>>>> IntAirNet- Fixed Wireless Broadband > >>>>>> > >>>>>> > >>>>>> ----- Original Message ----- > >>>>>> From: "Michael Baird" <m...@tc3net.com> > >>>>>> To: "WISPA General List" <wireless@wispa.org> > >>>>>> Sent: Wednesday, October 28, 2009 11:27 PM > >>>>>> Subject: [WISPA] 5.8 Omni > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>>> I need a 5.8 Omni to feed some smaller sites via WDS, > looking for some > >>>>>>> recommendations was hoping for 16 db but can't seem to find any. > >>>>>>> > >>>>>>> Regards > >>>>>>> Michael Baird > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> > >> > -------------------------------------------------------------------------------- > >> > >>>>>>> WISPA Wants You! 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