Radar Receivers

Radar Receivers

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This chapter describes the basic operation and components of a generic radar receiver consisting of low-noise amplifiers, signal mixers, preselector filters, among others.

Chapter Contents:

  • Amplifying the Echo
  • The Limitation by Noise
  • Bandwidth Requirement of the Receiver
  • mds Measurement
  • 'Tangential' mds
  • Noise Figure
  • Noise Figure in DeciBels
  • Signal-to-Noise Ratio Degradation
  • Overall Noise Figure F t
  • The Parametric Amplifier (Paramp)
  • Effective Noise Temperature
  • Noise Figure Monitoring
  • Antenna Noise and Solar Strobes
  • The Superheterodyne Receiver
  • The Low-Noise Amplifier and Preselector Filter
  • Double Conversion
  • Multiple i-f Amplifiers
  • Phase Detection
  • Quadrature Phase Detectors
  • The First Detector/Signal Mixer
  • The Detector Crystal
  • The Double-Balanced Mixer
  • Mixer Current
  • Fault Indications
  • The Local Oscillator
  • The Swept-Bandpass afc
  • Sweeping the Bandpass
  • Search Operation
  • Track Operation
  • Adjustment
  • Discriminator-Type afc
  • i-f Amplifiers
  • The Normal i-f Amplifier
  • Normal i-f Ancillary Circuits
  • Special Features
  • Special Uses
  • Testing and Alignment
  • The Logarithmic i-f Amplifier
  • Test Procedures
  • The MTI i-f Amplifier
  • Performance Testing
  • Adjustments
  • Video Output
  • The MTD i-f Amplifier (ASR-9)
  • Adjustments
  • Gain and Bandpass Testing
  • Markers
  • General Rules
  • Gain Testing
  • Review Questions
  • Answers to Review Questions

Inspec keywords: automatic frequency control; low noise amplifiers; radar receivers; mixers (circuits); filters

Other keywords: preselector filters; signal mixers; low-noise amplifiers; radar receivers

Subjects: Modulators, demodulators, discriminators and mixers; Amplifiers; Filters and other networks; Radar equipment, systems and applications

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