Antennas

Gain and Yagi Antennas

  • Two common methods of gain measurement —
    • dBi which is dB (deciBels) relative to an isotropic antenna, i.e., a theoretical antenna in free space with equal radiation in all directions
    • dBd which is dB relative to a half wave dipole.  This is a more meaningful comparison as a half wave dipole has a gain of 2.1dB over an isotropic radiator