Antenna Theory Flashcard

Front

What is the term for the formula relating received power to transmitted power in free space?

Back

Friis Transmission Equation

Front

What is the term for the opposition to current flow in an antenna input measured in ohms?

Back

Input Impedance

Front

What is defined as the resistance modeling power radiated by the antenna into space?

Back

Radiation Resistance

Front

What is the term for resistance causing power loss as heat within the antenna materials?

Back

Ohmic Resistance

Front

What is defined as the measure of how much input power is converted to a directed beam?

Back

Gain

Front

What is the term for the product of antenna efficiency and directivity?

Back

Directive Gain

Front

What is defined as the gain of a half-wave dipole antenna referenced to an isotropic source?

Back

2.15 dBi

Front

What is the term for the angular width between points where power falls to half of peak?

Back

Half-Power Beamwidth (HPBW)

Front

What is defined as the angular width between the first nulls on either side of the main lobe?

Back

First Null Beamwidth (FNBW)

Front

What is the term which means the directional characteristic described by antenna beamwidth?

Back

Directionality