Beverage Antenna Impedance Equations

For both Single-wire and Bi-directional Beverages - Compensating for ground characteristics

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Impedance (Z) of Single-wire Beverage

Beverage surge impedance
Z = Antenna impedance in ohms
h = height above ground
d = diameter of wire (in same units as height)



Impedance of two-wire Beverage to ground

Open-wire line impedance equation
Z = antenna impedance in ohms
h = height above ground
d = diameter of wires
S = Spacing between wires, center-to-center
  (h, d, and S must be in same units)




Impedance of Open-wire line (with mostly air dielectric)


Open-wire  line impedance equation
Z = transmission line impedance in ohms
S = spacing of the two wires, center-to-center
d = diameter of wires (in same units as spacing)





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http://www.w0btu.com/bev_ant_impedance-math.html - Last Edited November 10, 2013

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