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WA6CRE     --> LICENSE     --> ANTENNAS     --> FREQUENCIES     | ACS     | LINKS

What, Who     
Unit Abbr Symb Defn
- amp a I : current P/E
- c = speed light : f*λ
- farad f : capacitance
- hertz hz f : frequency
- meter m λ   wavelength
- ohm Ω : resistance
- volt v E : potential
- watt w P : power    P=IE

- Page by WA6CRE
- bio: QRZ
- APRS FindU.com
-- Find WA6CRE-10
- HamUniverse
Antennas may be horizontal, vertical or circularly polarized
-- Whip: Commonly λ/4 .. 5λ/8 .. easy to handle for handheld
 --- May cover more than one band, 10-80m, 6m-450MHz
-- Rubber duckies are less than λ/4 and may be multiband
-- Dipole: Half-wave (λ/2) often part of a beam / Yagi
-- Yagi (beam): multiple λ/2's in a flat plane
 --- Multi band beams are commonly called log periodics

Some great antenna tutorials on HamUniverse  ARRL Antenna HB
NTIA Frequencies Chart (96kb PDF)
Antenna measures 1λ = 1 wavelength -- λ/2 = 1/2 wavelength -- λ/4 = 1/4 wavelength
Two Meters (2m) ~= 76 inches :: λ/2 ~= 38 inches :: λ/4 ~= 19 inches :--: duckie shorter
Rubber (multi band) duckie on THF6 (2,
220 & 450MHz)
Magnetic roof mount 1/4 wave whip (λ/4)
2 meters



2m Dipole, pole mounted off tower












2m quad
Homebrew 3 element two meter Yagi
WA6CRE     --> LICENSE     --> ANTENNAS     --> FREQUENCIES     | ACS     | LINKS

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