Preface: are we talking outdoors? I'm afraid all of that gear (wifi routers, separate amps, cantennas) is junk at multiple levels that'll waste money while still not working well.
-if you want to put stuff outdoors, use an outdoor radio instead of lots of indoor equipment which'll need an ugly indoor setup with expensive coax going outside and/or an expensive outdoor enclosure that may not offer enough temperature protection. -the d-links are wifi routers, they do not offer any non-CDMA protocol for long distance/reliability, they have little transmit power, indoor only temperature range, limited voltage input range. Note the 2 antennas are on the same "radio" / in the same collision domain so you can't point them to different places or use them as separate "networks". -you don't want a separate amplifier to make up for having a crappy/cheap radio. The delay they take to switch from rx to tx isn't great for faster modern protocols. And if they screw up the timing of that switch due to power fluctuations I've seen them fry the radio's receivers. -cantennas have low gain (12db?), and they work for playing around indoors, but anything more permanent/outdoors needs good mounting options, waterproofing and a solid design that'll survive use. Everything I've done outside uses panels or dishes that go up to 19, 24, 30db, or for the omnidirectional antenna at your central point that's 12-14db. -depending on where this is setup, how much LOS and interference there is, 5.x ghz may be a better choice than 2.4ghz. A good multipoint setup, either indoor or outdoor, 2.4ghz or 5.x ghz, uses standalone radios (Canopy if you have money [but there's good sales these days on the old 14mbit gear], Ubiquiti/Mikrotik wifi radios in TDMA mode if you don't have money [and can make compromises]), with a ~15dbi omni or ~17dbi sector antenna at the AP and clients with 8-24 dbi antennas depending on need. On Mon, Sep 16, 2013 at 11:10 PM, Rob Guderian <[email protected]>wrote: > Preface:I'm planning on building an internet of things over a somewhat > large area. > > I just picked up two DIR-615s which will be running dd-wrt as local > hubs. They have 2 antennas, so I'm planning on having a directional > antenna to a (signal boosted) main hub, and having one antenna doing > local traffic. > > Question dump time: > 1. afaik This router is only 2.4GHz, so presumably these antennas are > both on. Correct? > > 2. Boosters. We're limited to 1W power output on antennas before > getting a license, correct? > > 2a. Anyone got a line on a good booster? USB need not apply. DX has > > http://dx.com/p/sunhans-sh-2000-2-4ghz-wireless-wifi-broadband-amplifier-signal-booster-silver-214735?gclid=CKzT9u7C0bkCFS_ZQgoduFYA8A > - but it's 2W. > > 3. There's multiple designs for cantennas. Anyone here ever build one? > Experiences? > The lame: > http://www.techradar.com/news/computing-components/peripherals/build-the-ultimate-wi-fi-boosting-cantenna-684073/2#articleContent > or http://www.instructables.com/id/WiFi-Cantenna-without-pigtail/ > To the compicated: > > http://www.makeuseof.com/tag/how-to-make-a-wifi-antenna-out-of-a-pringles-can-nb/ > which is a yagi antenna, and should have more gain. > _______________________________________________ > SkullSpace Discuss Mailing List > Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss > Archive: https://groups.google.com/group/skullspace-discuss-archive/ >
_______________________________________________ SkullSpace Discuss Mailing List Help: http://www.skullspace.ca/wiki/index.php/Mailing_List#Discuss Archive: https://groups.google.com/group/skullspace-discuss-archive/
