Electrical / Electronics
Transmission-line electrical length
Calculates β and electrical length from physical length, frequency and VF.
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RF wavelength
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Calculates 1/4, 1/2 or 5/8 wavelength length from frequency and VF.
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Calculates antenna effective aperture from linear gain and wavelength.
Coaxial line impedance
Calculates impedance of a homogeneous non-magnetic coaxial line from geometry and dielectric permittivity.
Simple microstrip impedance
Estimates microstrip impedance from trace width, substrate height and relative permittivity.
Quarter-wave transformer
Calculates quarter-wave section impedance for real positive source and load impedances.