There are many variations of this type of antenna out on the web. One resource is: http://www.wikarekare.org/
My favorite is the bicircle:
http://www.wikarekare.org/Antenna/bicircle.html
I've build a couple for 802.11b/g using large gauge #6 bare ground wire from Lowes and 6x4 inch 16oz. copper sheet metal from a local sheet metal shop (you might look around for a rain gutter shop... they use similar stuff).
By recalculating the specs you can build one for cell phone boosting (both GSM and CDMA single and dual band).
I currently have one dual-band design on a rooftop mast that pulls in cell signals from miles away. In this case its used for CDMA EVDO access in a mountainous area that normally receives no signal. :)
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There are many variations of this type of antenna out on the web. One resource is: http://www.wikarekare.org/
My favorite is the bicircle:
http://www.wikarekare.org/Antenna/bicircle.html
I've build a couple for 802.11b/g using large gauge #6 bare ground wire from Lowes and 6x4 inch 16oz. copper sheet metal from a local sheet metal shop (you might look around for a rain gutter shop... they use similar stuff).
By recalculating the specs you can build one for cell phone boosting (both GSM and CDMA single and dual band).
I currently have one dual-band design on a rooftop mast that pulls in cell signals from miles away. In this case its used for CDMA EVDO access in a mountainous area that normally receives no signal. :)