[OFARC] 2m Yagi-Uda homebrew antenna

[Steve Flowers]

Colleagues,

Good evening.  This is a picture of my homebrew 2m Yagi-Uda antenna.  
It's enabling me to hit the KA5QDG repeater from Katy, about 23 miles as 
the crow flies.  It's amazing how directional it is.  You pivot the 
antenna by ~30degrees either way from the repeater's azimuth and the 
received signal becomes _/noticeably /_noisier.

BTW, the center pole is a shower curtain rod and the elements are 
bent-out coat hangers.  The feedpoint is reinforced with 2 chopsticks.

2m_YagiUda_homebrew_antenna

It's interesting how the Yagi-Uda design reinforces wavefronts in one 
direction while using destructive interference to attenuate the 
wavefronts in most other directions.  Only element "E" is the driven 
dipole, the rest are parasitic reflector/directors that resonate "out of 
phase".

YagiUda_Antenna_GIF


Have a great holiday!

73,

Stephen (W2WF <https://www.qrz.com/db/W2WF>)




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