Data sheet link from antenna.
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Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Find out how this antenna as designed.
Making an Ultra-wideband Antenna – Part 1 (UWB Antenna Options)
Making an Ultra-Wideband Antenna – Part 2 (Introducing the Palm Tree Vivaldi Antenna)Making an Ultra-Wideband Antenna – Part 3 (performance)