Checkin your home made antennas


Found this whilst browsing

just off to try it my self.

Edit: the way to do the VSWR forumla in excel is =(10^(RC-1]/20)+1)/(10^(RC-1]/20)-1)

i use RC in excel the cell reference is the adjusted RL column in the example above.

edit: the rtlpan.exe in the tutorial is very good for filter checking.