Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Wifi through satellite dish
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Terryl" data-source="post: 1041203" data-attributes="member: 369937"><p>Don't forget the adapter, the normal connector for 75 ohm coax is an "F" style, trying to find an adapter to go from that directly to the reverse SMA on most routers is a bit difficult but I have found one source.</p><p></p><p><a href="http://www.americanradiosupply.com/rp-sma-male-to-type-f-female-coaxial-adapter-connector/" target="_blank">RP-SMA-Male to Type F-Female Coaxial Adapter Connector</a></p><p></p><p>In most cases the adapter loss for this application is very small around .15 dB, (times 2) but with the <strong>s</strong>tanding <strong>w</strong>ave <strong>r</strong>atio at 1.5:1 due to the coax impedance miss match you only have a return loss of 12 dB, (this needs to be as high as possible) this may affect the small amp used on most routers as it is looking for a very small SWR (1.1:1 at best) with the antenna directly attached to the back of the system, also at a SWR of 1.5:1 you only getting about 95% of the signal out to the antenna, your loosing 5% right off the bat.(at the TX output)</p><p></p><p>I have found with many years of testing and using many different setups I have found that the signal loss is too high to do any good with a standard routers output at only 100 to 200 mW, (<em>sorry I was wrong in my post above, I was quoting the output of my router</em>) with all the connections and with what ever loss in what ever coax length your using the actual RF signal at the antenna input will be very low. (around a few milli watts if that)</p><p></p><p>And most of the antennas supplied with the routers have little if no gain if they are used at the far end.</p><p></p><p>This is why I have gone to the USB type WIFI adapters, these can be mounted right at the antenna (with proper waterproofing) or as close as possible to the antenna, then USB to CAT 5/6 adapters can be used to go around the coax losses, and POE devices can deliver the necessary DC power to run them.</p><p></p><p>On most setups around here it looks something like this, at the PC or laptop a USB to CAT 5/6 adapter is used along with a POE device (if needed) the the CAT 5/6 cable is run out to the antenna location, (this can be several hundred feet) at the antenna site a water tight enclosure is used to house the USB WIFI adapter (one with a removable antenna) along with the CAT 5/6 to USB device and the POE adapter.</p><p></p><p>In this way your signal has the best chance to get where you need it to go, in really long range applications I use an Alpha <span style="font-size: 15px">AWUS036NH 2 watt WIFI adapter, now with this hummer you can really reach out there, even better when mounted directly at the antenna.</span></p><p></p><p><span style="font-size: 15px">One like this....<a href="https://www.amazon.com/Alfa-AWUS036NH-802-11g-Wireless-Long-Range/dp/B003YIFHJY" target="_blank">https://www.amazon.com/Alfa-AWUS036NH-802-11g-Wireless-Long-Range/dp/B003YIFHJY</a></span></p><p></p><p><span style="font-size: 15px">The only draw back to using that one is that you need to use an externally DC powered USB hub to run it as it is very power hungery, but all this can be enclosed in the WT box at the antenna.</span></p><p></p><p><span style="font-size: 15px">In my experience using a satellite Ku band dish for WIFI has not proven very effective, the only type of satellite dish I have seen that had done anything for<u> bidirectional</u> WIFI signals has been a "C" band dish, but these are very large and not too good for ground level work. (most are mounted at or near ground level)</span></p><p></p><p><span style="font-size: 15px">Home made cantennas are effective to maybe a few blocks or less in a city environment, but when a proper WIFI rated yagi antenna along with the USB equipment I have described and used at many locations, plus mounted at a sufficient height to clear most ground level obstructions, has been effective out to 1.5 to 2 miles, for bidirectional WIFI.</span></p><p></p><p><span style="font-size: 15px">And if you use a standard TV antenna rotor you can search around for many different WIFI access points.</span></p></blockquote><p></p>
[QUOTE="Terryl, post: 1041203, member: 369937"] Don't forget the adapter, the normal connector for 75 ohm coax is an "F" style, trying to find an adapter to go from that directly to the reverse SMA on most routers is a bit difficult but I have found one source. [URL="http://www.americanradiosupply.com/rp-sma-male-to-type-f-female-coaxial-adapter-connector/"]RP-SMA-Male to Type F-Female Coaxial Adapter Connector[/URL] In most cases the adapter loss for this application is very small around .15 dB, (times 2) but with the [B]s[/B]tanding [B]w[/B]ave [B]r[/B]atio[B] [/B]at 1.5:1 due to the coax impedance miss match you only have a return loss of 12 dB, (this needs to be as high as possible) this may affect the small amp used on most routers as it is looking for a very small SWR (1.1:1 at best) with the antenna directly attached to the back of the system, also at a SWR of 1.5:1 you only getting about 95% of the signal out to the antenna, your loosing 5% right off the bat.(at the TX output) I have found with many years of testing and using many different setups I have found that the signal loss is too high to do any good with a standard routers output at only 100 to 200 mW, ([I]sorry I was wrong in my post above, I was quoting the output of my router[/I]) with all the connections and with what ever loss in what ever coax length your using the actual RF signal at the antenna input will be very low. (around a few milli watts if that) And most of the antennas supplied with the routers have little if no gain if they are used at the far end. This is why I have gone to the USB type WIFI adapters, these can be mounted right at the antenna (with proper waterproofing) or as close as possible to the antenna, then USB to CAT 5/6 adapters can be used to go around the coax losses, and POE devices can deliver the necessary DC power to run them. On most setups around here it looks something like this, at the PC or laptop a USB to CAT 5/6 adapter is used along with a POE device (if needed) the the CAT 5/6 cable is run out to the antenna location, (this can be several hundred feet) at the antenna site a water tight enclosure is used to house the USB WIFI adapter (one with a removable antenna) along with the CAT 5/6 to USB device and the POE adapter. In this way your signal has the best chance to get where you need it to go, in really long range applications I use an Alpha [SIZE=4]AWUS036NH 2 watt WIFI adapter, now with this hummer you can really reach out there, even better when mounted directly at the antenna.[/SIZE] [SIZE=4]One like this....[URL]https://www.amazon.com/Alfa-AWUS036NH-802-11g-Wireless-Long-Range/dp/B003YIFHJY[/URL][/SIZE] [SIZE=4]The only draw back to using that one is that you need to use an externally DC powered USB hub to run it as it is very power hungery, but all this can be enclosed in the WT box at the antenna.[/SIZE] [SIZE=4]In my experience using a satellite Ku band dish for WIFI has not proven very effective, the only type of satellite dish I have seen that had done anything for[U] bidirectional[/U] WIFI signals has been a "C" band dish, but these are very large and not too good for ground level work. (most are mounted at or near ground level)[/SIZE] [SIZE=4]Home made cantennas are effective to maybe a few blocks or less in a city environment, but when a proper WIFI rated yagi antenna along with the USB equipment I have described and used at many locations, plus mounted at a sufficient height to clear most ground level obstructions, has been effective out to 1.5 to 2 miles, for bidirectional WIFI.[/SIZE] [SIZE=4]And if you use a standard TV antenna rotor you can search around for many different WIFI access points.[/SIZE] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Wifi through satellite dish
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top