 # Parabolic antenna gain

To use the calculator you need to enter any three of four values and the calculator will compute the fourth one (if it is mathematically possible). Remember to select proper units and click the [Compute] button which is connected to field you want to evaluate.
• A/d - size of antenna aperture (as an area or as an diameter)
• λ/f - wavelength or frequency
• e - aperture efficiency (as a value [0..1] or percent)
• G - antenna gain (as a dimensionless quantity or as dBi value)

A/d =

λ/f =

e =

G =

resistors in parallel
capacitors in series
inductances in parallel
LC resonance circuit
single-layer air-cored coil
circular loop coil
square loop coil
frequency,wavelength,period
three-digit capacitor markings
resistor codes (4 bands)
resistor codes (5 bands)
choke/inductor color codes
555 astable
555 monostable
match standard Ex value
combine standard E6, E12 & E24 values
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mm ⇆ in converter
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Ohm's law
dropping resistor for 'P' tubes
dropping capacitor for 'P' tubes
dropping resistor for 'U' tubes
dropping capacitor for 'U' tubes
line-of-sight
dropping resistor for LEDs
Y-Δ transform
Y-Δ transform (capacitances)
parabolic antenna gain
AWG converter

[ekalk]© Sławek Wernikowski, 2012-2018. Set of useful interactive calculators for electronics constructors and hams.

All suggestions and comments are always welcome.

[1.10 2019-01-13][]