Then cut the 50-O feed line at a multiple of an electrical half-wavelength at 375 MHz from the antenna. A dipole antenna is an antenna with two equal length elements on each side. Such an antenna is called as half-wave dipole antenna.
A half-wave dipole antenna consists of two quarter-wavelength conductors placed end to end for a total length of approximately L l2The current distribution is that of a standing wave approximately sinusoidal along the length of the dipole with a node at each end and an antinode peak current at the center feedpoint.
Antenna length is based on the following formulas. L - the length of the arm of the dipole antenna in feet ft. For example for a half-wave dipole a 2 and if we use l e 4 in 25120 we have R rˇ50 25121 However a half-wave dipole is not much smaller than a wavelength and does not qualify to be a Hertzian dipole. Where k 2pl and z runs from L2 to L2.