Transceiver
Understanding Transceivers
Transceivers represent the highest level of RF system integration. A modern 5G transceiver IC contains everything from data converters to RF amplifiers, enabling complete wireless functionality in a single package.
Transceiver Architecture
- Transmit path: DAC, upconversion mixer, TX filter, PA driver, PA.
- Receive path: LNA, RX filter, downconversion mixer, ADC.
- Common: Synthesizer (LO generation), clock distribution, digital control, calibration.
Modern Transceiver Integration
- Wi-Fi SoC: Complete 802.11ax transceiver in single chip. < 5mm^2.
- Cellular modem: 5G NR + LTE transceiver with integrated PA and antenna tuning.
- SDR: Wideband transceiver (70 MHz - 6 GHz) with integrated ADC/DAC. AD9361/AD9371.
Frequently Asked Questions
What is a transceiver?
A transceiver combines transmitter and receiver in one device, sharing antenna, synthesizer, and baseband. Modern transceivers integrate the complete signal chain on a single IC or module. The standard building block for wireless systems.
What is a software-defined transceiver?
An SDR transceiver uses wideband ADC/DAC with FPGA processing to implement radio functions in software. This allows the same hardware to support different waveforms, protocols, and frequencies by changing software.
How are 5G transceivers different from LTE?
5G transceivers support wider bandwidth (100-400 MHz vs 20 MHz), higher frequencies (mmWave), more MIMO streams (4x4 to 8x8), and multiple simultaneous band combinations. The complexity and integration level has increased dramatically.