Greetings,

I'm currently developing a project which requires a specialized
antenna. The system consists in a sensor equipped suit that delivers
the data to a server. I'm having problems findind a suitable antenna
for the suit, since it requires to be integrated on the suit or in a
backpack (whip antennas are out of the question, since the suit can't
have any holes). The main problem is the human body effect and the
size constraints. Gain is also a major requirement since the range of
the operations will be 400 meters with line of sight.
(Server side: 10 dBm Tx Power and a 6 dB whip antenna, Suit side: -96
dBm sensibility- freq:433 MHz)

I've tried a patch antenna (similar to the one provided by linx
technologies) but it didn't perform well. I've also tried a small whip
antenna but the ground plane dimensions aren't suitable for
integrating this type of antennas in the backpack. I've also found a
dipole body worn antenna ( http://www.panorama.co.uk )., but I'm not
sure of its performance. Currently I'm trying to develop my own
antenna, which consists of a pcb small loop antenna. I'm asking for
sugestions and maybe antenna references for this type of application.

Thanks in advance.


I am not aware of any publicly available info that would aid you on this. There
are paths to solutions, but you won't find them on a radio amateur NG.

73,
Chip N1IR

In article ,
(Fractenna) wrote:


I am not aware of any publicly available info that would aid you on this.
There
are paths to solutions, but you won't find them on a radio amateur NG.

73,
Chip N1IR

What's this? Are you telling us that the "Fantastic Fractal Antenna"
isn't the solution to this, and, or all the worlds problems?????
How can this be?? I was under the impression that the "Fantastic
Fractal Antenna" was thr "Cats Meow" and could solve all our problems.



Me who wonders if the Sky will now Fall, or Hell Has Frozen Over....

What's this? Are you telling us that the "Fantastic Fractal Antenna"
isn't the solution to this, and, or all the worlds problems?????
How can this be?? I was under the impression that the "Fantastic
Fractal Antenna" was thr "Cats Meow" and could solve all our problems.



Me who wonders if the Sky will now Fall, or Hell Has Frozen Over....


What's this? A silly person who hides behind an idiot screen name?

If I wish to discuss fractal antennas, I will do so without hesitation and
great delight.
After all, the tide has long since rolled in...not that you've noticed:-)

You won't find any helpful info on BWA on this NG. It's not the right venue.

Go hide behind that rock again, Ol' fella!

73,
Chip N1IR