Saturday, Aug 02, 2014 at 09:14
last time I looked, above 1GHz was considered EHF or microwave...NextG running right up in the 850s, is getting close to the border line between UHF and microwave...appart from the fact that NextG is not the only system arround, and people do use the other networks..and they most definitely are located above 1GHz.
While i may have been mislead or misunderstood the issue of time bassed absolute range limitation.....the primary limitation with mobile phones, because they work at such short wavelengths is the propogation being "line of sight" and that meaning exactly what it says.
regardless of how much power (and the system is limited to 25 watts in the base ststions and 0.6 watts in the hand helds) or how much gain in the antenna.....you would have to have a very high and clear location, INdeed, to achieve 200Km range.
As far as the various areials.
While there are 9dbi gain mobile antennas and 12dbi base station areials out there commonly, many of the big white sticks and big black sticks out there are in the 5 and 7 dbi range.
there are many wire and light fiberglass whips out there that produce 5dbi and some that produce 7dbi, fairly commonly available.
even some of the commercially available shark fin type antennas will produce 5dbi.
All the above figures are on the NextG band.
Choose
well and the light weight wire or fiberglass whip may
well indeed produce more gain than one of the lower gain big white or big black sticks.
If that light weight aerial is mounted high and clear where the big white stick is mounted on the bullbar...some 1 meter lower....the light weight antenna may very
well handily spank the big white stick for performance....even when the Big white stich has a couple of points more gain.
Back to the original posters issue.......the little devil antenna shown in the utube advertisment is a can antenna...nothing new......what makes me scheptical is that they do not quote a gain figure for this antenna on their web site..so who knows how much gain it produces.
Interestingly, they also sell a big black stick, that they refeer to as "high performance"....and quote a 5dbi gain figure on it.
There are other low profile antennas in the form of shark fins, cans and stubs that produce in the line of 2 to 5 dbi gian.
As for NextG, not being range limited.....yeh right....anybody out there getting a consistent 100Km out of the NextG vehicle mounted or hand held mobile phone.???
cheers
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