[MLB-WIRELESS] rectangular waveguide theory?

[Drew]

I have access to a lot of rectangle cans, wondering if they'd be 
suitable for antenna, but haven't come across any info on building 
rectangular cantenna's. I have seen this page: 
http://members.iinet.net.au/~clark/FreeNet/#BrickAntennaDesign but 
there's no theory or calc's listed like on the page for circular 
cantenna's. http://www.turnpoint.net/wireless/cantennahowto.html

Anyways, the cans I have are 6.5"x4"x9.5" with rounded edges, 
approximately .5" radius curve. Can anyone help with the RF theory?

Drew



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