RF Glossary: O | Terms Starting with O

OFDM (Orthogonal Frequency Division Multiplexing) — A digital modulation scheme that divides a wideband channel into many narrowband orthogonal subcarriers for efficient spectral use.

Ohmic Loss — Power dissipation caused by the finite conductivity of conductors, converting RF energy to heat through resistive effects.

Omnidirectional Antenna — An antenna that radiates equally in all directions in one plane, typically the azimuth plane, while having directivity in the elevation plane.

Oscillator — A circuit that generates a continuous periodic waveform without an external input signal, used as signal sources and local oscillators.

Output Power (Pout) — The RF power delivered by a device to its load, measured at the output port in dBm or watts.

Overmod (Over-Moded Waveguide) — A waveguide operated at a frequency well above cutoff where multiple modes can propagate, used to reduce loss.

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