[SI-LIST] PCB Trace Antenna

Hi folks,

I did a system for a remote control using several types of
radiation elements.  It was hand held so the user interfered
a lot with some types.  The best, on both ends, was a loop
around the periphery of the board, tuned to resonance with
a capacitor.  Feeding the beast was fun, try different things,
like tapped capacitance works well.

The systems we did trying to use a 1/4 wave got too much
interference from the microprocessor on the receiving
system.

Good luck,
dav0
David Lieby
Siemens Med. USD, MVIS-S

Andrew Burnside wrote:
> Virenda
>  
> Of course the dielectric underneath the antenna will effect your readings.
> If you think about the path of the current, then there will be associated 
> field lines.
> If you cut these field lines with anything, then you will change the 
> impedance.


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