COMMUNICATION TERMS

Radiation Resistance

• is the total power emitted by an antenna in the form of electromagnetic waves.

• is a complex quantity that includes both resistance (R) and reactance (X). It characterizes how an antenna interacts with the electrical current and voltage applied to it.

• is the resistance component of an antenna's impedance that represents the power dissipated as electromagnetic waves radiate into space.

• is a measure of an antenna's ability to focus or concentrate radiated energy in a specific direction compared to an ideal isotropic radiator

Antenna Impedance

• is the resistance component of an antenna's impedance that represents the power dissipated as electromagnetic waves radiate into space.

• is a complex quantity that includes both resistance (R) and reactance (X). It characterizes how an antenna interacts with the electrical current and voltage applied to it.

• is a measure of how effectively an antenna converts electrical input power into radiated power

• is a measure of an antenna's ability to focus or concentrate radiated energy in a specific direction compared to an ideal isotropic radiator

Radiated Power

• is the total power emitted by an antenna in the form of electromagnetic waves

• It characterizes how an antenna interacts with the electrical current and voltage applied to it

• is a measure of an antenna's ability to focus or concentrate radiated energy in a specific direction compared to an ideal isotropic radiator

• is a measure of how effectively an antenna converts electrical input power into radiated power

Gain

• is the total power emitted by an antenna in the form of electromagnetic waves

• is the resistance component of an antenna's impedance that represents the power dissipated as electromagnetic waves radiate into space

• is a measure of how effectively an antenna converts electrical input power into radiated power

• is a measure of an antenna's ability to focus or concentrate radiated energy in a specific direction compared to an ideal isotropic radiator

Efficiency

• is a complex quantity that includes both resistance (R) and reactance (X)

• is the total power emitted by an antenna in the form of electromagnetic waves

• is a measure of how effectively an antenna converts electrical input power into radiated power

• is a measure of an antenna's ability to focus or concentrate radiated energy in a specific direction compared to an ideal isotropic radiator

Selectivity

• is a feedback mechanism used in a receiver to automatically adjust the gain (amplification) of the received signal based on its strength

• is a property of a receiver that relates to its ability to reject signals that are mirrored (reflected) around the local oscillator frequency.

• is a measure of a receiver's ability to discriminate between signals at different frequencies and reject unwanted signals that are close in frequency to the desired signal

Image Channel Rejection

• is a feedback mechanism used in a receiver to automatically adjust the gain (amplification) of the received signal based on its strength

• is a property of a receiver that relates to its ability to reject signals that are mirrored (reflected) around the local oscillator frequency.

• is a measure of a receiver's ability to discriminate between signals at different frequencies and reject unwanted signals that are close in frequency to the desired signal

Automatic Gain Control (AGC)

• is a feedback mechanism used in a receiver to automatically adjust the gain (amplification) of the received signal based on its strength

• is a property of a receiver that relates to its ability to reject signals that are mirrored (reflected) around the local oscillator frequency.

• is a measure of a receiver's ability to discriminate between signals at different frequencies and reject unwanted signals that are close in frequency to the desired signal

Noise Reduction

• Speech amplifier with compression

• Speech amplifier without compression

Controlled dynamic range

• Speech amplifier with compression

• Speech amplifier without compression