Re: Vivaldi ant
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Think of it as another way to feed a horn.
Hard to get a Vivaldi above 8 dBi or so gain.
Ridged horns can easily go to 20 dBi.
Of course the EMI horn is playing other games to get a more
constant Antenna Factor.
The Copper ones are mine, the 'PTI' is one at the EMI
lab I use for FCC/CE certifications.