YO3ANV
Antenna designs with full simulation data, NEC files, and build details. Everything simulated in 4NEC2, built, and tested.
7designs
3articles
7calculators
Antenna Designs
All 7 designs
20/15/10mDipole
20/15/10m Stacked Fan Dipole
Multiband HF — 14 / 21 / 28 MHz
Gain~7.5 / 7.0 / 6.5 dBi
Z50 Ω (direct feed)
10 m span3 bandsSingle feed
20mGround Plane
20m Ground Plane
Fishing Rod Vertical — 14 MHz
Gain0.5 dBi
Z50 Ω
4.97 m vertical4 radials500 W
2mYagi
2m 3-Element Yagi
144 MHz — 4 mm / 6 mm aluminium
Gain7.17 dBi
Z50 Ω
520 mm boom3 elementsPortable
2mYagi
2m 3-Element Yagi — ISS
145.8 MHz — 8 mm aluminium — ISS / SSTV
Gain7.12 dBi
Z50 Ω
910 mm boom3 elementsHand-held
Articles
All articlesSWR — What It Actually Tells You
Reflected power, cable loss, common-mode current. What SWR means in practice.
Why Your Antenna Works the Same on TX and RX
Lorentz reciprocity — passive antennas have identical performance both ways.
"My Antenna Works Great!" — Compared to What?
dB, dBi, dBd, dBm — why antenna claims need a reference point.