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Body Worn antenna - UHF range - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Body Worn antenna - UHF range
Posted: Mon Dec 20, 2004 12:57 pm 
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)

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.



Posted  11/12/2012
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