SparkFun Forums

[SebaS]

Take a look at this antenna:
http://www.olimex.com/dev/images/AVR/AVR-GSM-BOT.jpg


from this module:
http://www.olimex.com/dev/avr-gsm.html

Do you guys know how can I build one of them? Or I was just think on "copy" that exact one... meassuring it from the picture and everything else... but if I can biuld it it would be better...


Thanks!!!

[SebaS]

I've been researching and that type of antenna is a YAGI ANTENNA, an helical one.
http://en.wikipedia.org/wiki/Yagi-Uda_antenna

Does any of you know how to calculate it?



As always thanks in advance!

[leon_heller]

It's neither a Yagi or a helical antenna, they will only work on a single band and are constructed differently. It looks most like a tapered meander antenna.

Leon