analogRF

analogRF is a term used to describe the analog domain of radio frequency signal processing, focusing on continuous-time, continuous-amplitude processing of RF signals before or without digital conversion. It contrasts with digitally assisted or software-defined approaches that move substantial work into the digital domain. In this sense, analogRF encompasses the design and integration of the front-end blocks that shape, amplify, and translate RF signals.

Core components and architectures in analogRF include low-noise amplifiers (LNAs) for sensitivity, mixers for frequency translation, local oscillators and phase-locked loops for frequency synthesis, power amplifiers for transmission, and RF filters and impedance-matching networks to shape amplitude and selectivity. Receiver and transmitter front-ends may be implemented with discrete components, monolithic microwave integrated circuits (MMICs), or RFICs, using technologies such as GaAs, SiGe, or CMOS. Antennas and RF interconnects, including switches and duplexers, are also part of the analogRF landscape. Integration levels vary from modular assemblies to highly integrated chip-scale solutions.

Design goals and challenges in analogRF include achieving low noise figure, high gain, and strong linearity (characterized by metrics such as IP3 and 1 dB compression point), while maintaining stability, adequate isolation, and power efficiency. Phase noise, temperature drift, and component tolerances are important considerations. Trade-offs among gain, power consumption, size, and cost are common. Linearization techniques, including analog predistortion and envelope tracking, may be used alongside digital methods in a broader system context.

Applications span cellular base stations, Wi‑Fi and other wireless transceivers, GNSS, radar, satellite links, and IoT devices, where preserving signal integrity at the RF front end remains essential even as digital processing advances. See also RF front end, RFIC, MMIC, RF design, and software-defined radio.