Re: Cantenna Mobile Internet

On Mon, 4 Feb 2008 16:46:23 -0500, surfsup
<surfsup.34a0uq@no-mx.wirelessforums.org> wrote:

>
>Ok I don't know if this is strictly in the right place

It's not, but that's ok.

>but maybe someone
>can help. I have recently signed up for Vodafone's Mobie internet.

This one?
<http://online.vodafone.co.uk/dispatch/Portal/appmanager/vodafone/wrp?_nfpb=true&_pageLabel=templateBlank&pageID=MI_ 0001>
or perhaps this one?
<http://online.vodafone.co.uk/dispatch/Portal/appmanager/vodafone/wrp?_nfpb=true&_pageLabel=template04&pageID=MB_000 1>
If so, it's a cellular data service.

>A
>dongle that runs from my sb port.

It's a USB port.

>I get varying degrees of reception. Sometimes 2g and poor and sometimes
>3g good.

3G is HSDPA which has less range than 2G which I'll guess(tm) is EDGE.

>Does the mobile internet run over same wavelenghts as mobile phones.

No. Wi-Fi (802.11) is at 2.4GHz. I'll guess that cellular in
Portugal is at 800Mhz and 1800MHz.

>Can i build a form of cantenna to increase its reception

Sure. At 800MHz, the can will be about 8 inches in diameter and
perhaps a foot long. Something like a small metal trash can. I can
just imagine what that would look like on your vehicle rooftop.

>Any help greatly appreciated

Ask in the Vodaphone newsgroups.
Specify your hardware and country.

The USB dongle does not have an external antenna, so anything you add
will wreck the warranty.

--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

On Mon, 04 Feb 2008 19:56:03 -0800, Jeff Liebermann
<jeffl@comix.santa-cruz.ca.us> wrote in
<bumfq3pr0nfhsfru3j3gfebcjoedflci0c@4ax.com>:

>On Mon, 4 Feb 2008 16:46:23 -0500, surfsup
><surfsup.34a0uq@no-mx.wirelessforums.org> wrote:

>>I get varying degrees of reception. Sometimes 2g and poor and sometimes
>>3g good.
>
>3G is HSDPA which has less range than 2G which I'll guess(tm) is EDGE.

Range of HSDPA (UMTS) is as good as EGPRS(EDGE), if not better.

>>Does the mobile internet run over same wavelenghts as mobile phones.
>
>No. Wi-Fi (802.11) is at 2.4GHz. I'll guess that cellular in
>Portugal is at 800Mhz and 1800MHz.

2100 MHz for 3G. Otherwise 900/1800 MHz.
http://www.gsmworld.com/roaming/gsminfo/cou_pt.shtml

>>Can i build a form of cantenna to increase its reception
>
>Sure. At 800MHz, the can will be about 8 inches in diameter and
>perhaps a foot long. Something like a small metal trash can. I can
>just imagine what that would look like on your vehicle rooftop.

2100 MHz won't be that different from 2400 MHz

--
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