Radio receiver

An electronic device that selects and processes radio-frequency signals, converting their information into sound, data, or another usable signal.

Antenna: A conductive structure that transmits or receives electromagnetic waves by converting between fields and electrical signals. It captures incoming radio energy and turns it into a voltage the receiver can process.
Radio wave: An electromagnetic wave in the radio-frequency portion of the spectrum. It is the physical carrier that reaches the receiver from a transmitter.
Crystal radio receiver: A simple passive radio receiver that uses a tuned circuit and detector, often a crystal diode. It shows how reception can work without powered amplification.
Broadcast receiver: A receiver designed to reproduce one-way radio or television broadcasts for general audiences. It turns broadcast transmissions into household audio or video.
Tuned circuit: A resonant electrical circuit that favors signals within a particular frequency range. It selects the desired station while rejecting signals at other frequencies.
Radio frequency: The range of electromagnetic frequencies used for radio communication and related applications. It defines the signals the receiver’s antenna and circuits are designed to handle.
Regenerative receiver: A receiver that feeds part of an amplifier’s output back into its input to increase sensitivity and selectivity. It uses controlled feedback instead of a separate high-gain receiver chain.
Shortwave radio: Radio communication using high-frequency bands that can propagate over long distances through ionospheric reflection. Shortwave receivers can hear distant broadcasters and other services.
Radio-frequency amplifier: An amplifier that increases the strength of signals at radio frequencies. It boosts the weak signal before frequency selection or detection.
Amplitude modulation: A modulation method that encodes information by varying a carrier wave’s amplitude. Simple envelope detectors can recover audio from many AM broadcasts.

Linked from 31 pages