Antenna for GSM or CDMA cell phones?

Does anyone knows any web page with a project similar to an antenna
for GSM or CDMA cell phones??

heldmar <heldmar@gmail.com> wrote:
> Does anyone knows any web page with a project similar to an antenna
> for GSM or CDMA cell phones??

There was a thread in this group Aug 23.
http://groups.google.com/group/alt.internet.wireless
"anyone built a Cantenna for GSM phone use ?"
Are you talking about near the phone? I think the topic at hand was
sticking the stub antenna into a can at the right point for a cantenna, and
using bluetooth for conversation.

The problem is, I think, that you have to decide whether your desired
signal is at 800/850/1800/1900 in order to build the proper antenna.

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Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5

Well in fact I read that topic before posting, but I didn't understand
anything of what they say in it, I mean...I have my cell phone GSM and
CDMA, both are Motorola.

I would like to make an antenna to have better reception with any of
those. I've read that playing with the antenna diameter I could get the
proper frequency for my cell phone (in this case, my telephone carrier
works on 900 mhz)

What I really don't know is how it's going to be supposed to get a
better signal my cell phone from the antenna? I mean, I would put my
cantenna on the roof to receive the signal but...how am I supposed to
give that signal to my cell phone?? Does this cantenna has to be
connected to another cantenna downstairs which would send the improved
signal to my cell phone?

> cantenna on the roof to receive the signal but...how am I supposed to
> give that signal to my cell phone?? Does this cantenna has to be
> connected to another cantenna downstairs which would send the improved
> signal to my cell phone?

How about with a cable? Just about most phones have an external antenna
socket. This makes a connection with the car kit which has an external
antenna - spooky that eh?

However, I suspect that the can on your roof will end up with such a
cable length that the losses in the cable will be more than the antenna
gain.

If you're going to then attach a cable why not just use a landline? ;)

http://cellantenna.co.uk/

David.