Log Periodic Antenna

150px-VHF_UHF_LP-antenna_closeup.jpeg
Log periodic mounted for vertical polarization, covers 140–470 MHz:

Building a Log Periodic Antenna

A log-periodic antenna (LP), also known as a log-periodic array or log-periodic aerial, is a multi-element, directional antenna designed to operate over a wide band of frequencies. It was invented by John Dunlavy in 1952.
https://en.wikipedia.org/wiki/Log-periodic_antenna

Log‑Periodic Dipole Array Calculator by Serge Stroobandt, ON4AA and Michael McCue, W7YZT:
https://hamwaves.com/lpda/en/index.html

"A do-it-yourself" guide to design and construction of log periodic antennas:
https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1959/11/page11/index.html

Designing Log Periodic Antennas by Glen Dash, Ampyx LLC, GlenDash at alum.mit.edu:
http://glendash.com/Dash_of_EMC/Log_Periodic/Log_Periodic.htm

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20200414 - pre published v0.9