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The half-wave dipole is one of the most popular antenna types used by amateur (ham) radio operators. This widget calculates the total length of a half-wave dipole and the length of each leg based upon the frequency, wavelength, and the speed of light (3x108 meters per second). This widget can handle frequencies up to a maximum of 1000 MHz (1 GHz).

The SWR (Standing Wave Ratio) is the relationship between the forward power (sent to the antenna) and the reverse power (reflected back to the transmitter). This widget calculates the SWR given the forward power (in Watts) and the reflected power (in Watts).

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