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Components of RF front-end modules

Components of RF front-end modules

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Driven by the original equipment manufacturers (OEMs) who make smartphones, the fourth generation (4G) and the fifth generation (5G) mobile technologies are changing the radio frequency (RF) front-end (RFFE) industry landscape. This chapter discusses the different components utilized in the design of modern RFFE transceiver modules, whether used to construct a simple or a highly integrated complex module. In particular, the Chapter discusses RF power modules, low-noise amplifiers, RF switches, phase shifters, RF filters, CMOS controllers, RF circulators and isolators, RF mixers, RF oscillators, microwave baluns, RF power limiters, and diversity antennas.

Chapter Contents:

  • 7.1 Introduction
  • 7.2 RF power amplifiers
  • 7.2.1 Classes of power amplifiers
  • 7.2.1.1 Class A
  • 7.2.1.2 Class B
  • 7.2.1.3 Class AB
  • 7.2.1.4 Class C
  • 7.2.1.5 Class D
  • 7.2.1.6 Class E
  • 7.2.1.7 Class F
  • 7.2.2 Common PA configurations
  • 7.2.2.1 Doherty amplifier
  • 7.2.2.2 Direct-coupled amplifier
  • 7.2.2.3 RC coupled multistage amplifier
  • 7.2.2.4 Transformer coupled amplifier
  • 7.2.2.5 Differential coupled amplifier
  • 7.2.2.6 Darlington amplifier
  • 7.2.3 PA stability
  • 7.2.4 PA linearization
  • 7.2.5 PA biasing
  • 7.2.6 PA distortion
  • 7.3 Low noise amplifiers
  • 7.4 RF switches
  • 7.4.1 PIN diode switches
  • 7.4.2 FET switches
  • 7.5 Phase shifters
  • 7.6 RF filters
  • 7.6.1 RF passive filters
  • 7.6.1.1 Lumped-element filters
  • 7.6.1.2 Distributed microwave filters
  • 7.6.1.3 Coupled resonator filters
  • 7.6.1.4 Acoustic-wave filters
  • 7.6.1.5 Multiplexers
  • 7.6.2 RF active filters
  • 7.7 CMOS controllers
  • 7.8 RF circulators and isolators
  • 7.9 RF mixers
  • 7.10 RF oscillators
  • 7.11 Microwave baluns
  • 7.12 RF power limiters
  • 7.13 Diversity antennas
  • References

Inspec keywords: transceivers; 5G mobile communication; radiofrequency integrated circuits; 4G mobile communication

Other keywords: RFFE transceiver modules; microwave baluns; original equipment manufacturers; fourth generation mobile technologies; RF front-end modules; RF power modules; 5G technologies; fifth generation mobile technologies; RF switches; 4G technologies; CMOS controllers; RF mixers; RF oscillators; RFFE technologies; diversity antennas; phase shifters; low-noise amplifiers; RF circulators; RF filters; RF power limiters; smartphones; isolators

Subjects: Mobile radio systems; Microwave integrated circuits

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