Transceiver - definition
Transceiver - definition
Transceiver (short for transmitter-receiver) is an electronic circuit that combines the functions of a transmitter and a receiver in a single Enclosures or system. Its primary task is to implement bidirectional signal communication, meaning that it can both transmit and receive signals in the same frequency band or in separate bands - depending on the architecture.
Transceivers are commonly used in data transmission systems such as Computer Networks (e.g. Ethernet), wireless communications (Wi-Fi, Bluetooth, LoRa), radio communications (CB, SDR, radios), as well as in fibre optic solutions (e.g. SFP - Small Form-factor Pluggable). Depending on the transmission technology, the transceiver can operate at different layers of the OSI model - from the physical to the data link layer.
From a design point of view, a transceiver can be an integrated circuit (e.g. in a microcontroller or RF module), a separate module with input/output interfaces or an integrated subassembly with an antenna, power amplifier, filter and analogue-to-digital converter. In digital systems, it also acts as a interface, translating voltage levels and signal formats between different devices, e.g. on CAN, RS-485 or USB buses.
Modern transceivers are characterised by a high degree of configuration flexibility - they can dynamically switch operating modes, change modulation parameters, transmission speeds and carrier frequency. Radio systems often use TDD (Time Division Duplex) or FDD (Frequency Division Duplex) solutions, which determine how transmission and reception are separated in time or frequency space. In applications integrated with microcontrollers, transceivers often work together with circuits that control transmission logic and communication protocols.
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