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USES OF KLYSTRON AMPLIFIERS IN RADAR
 The radar transmitter produces the short duration high-power RF pulses of energy
that are radiated into space by the antenna.
 The radar transmitter is required to have the following characteristics:
Must have the ability to generate the required mean RF power and the required peak power.
Must have a suitable RF bandwidth.
Must have a high RF stability to meet signal processing requirements.
Must be easily modulated to meet waveform design requirements.
Must be cost effective.
Power Amplification Process
Amplification Occurs in Multiple Stages
 Driver Amplifier
 High Power Amplifier
o Vacuum Tube Amplifiers – Klystron, TWT
o Solid State Power Amplifier – Solid State Power Transistor
Requirement for power amplifier
 Low noise
 Minimum distortion to input signal
 The Radar uses two
klystrons that offer a
total o/p power of 1
MW at 2380 Mega
Hertz.
 Klystron amplifiers are high power microwave vacuum tubes.
 Klystrons make use of the transit-time effect by varying the velocity of an electron beam. A
klystron uses one or more special cavities, which modulate the electric field around the axis the
tube.
 Due to the number of the resonant cavities klystrons are divided up into:
 Multicavity Power Klystron
 Repeller Klystron
Klystron Tubes (Vacuum Devices)
MIT/LL Millstone Hill Radar

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Uses of Klystron Amplifiers in Radar Transmitters

  • 1. USES OF KLYSTRON AMPLIFIERS IN RADAR  The radar transmitter produces the short duration high-power RF pulses of energy that are radiated into space by the antenna.  The radar transmitter is required to have the following characteristics: Must have the ability to generate the required mean RF power and the required peak power. Must have a suitable RF bandwidth. Must have a high RF stability to meet signal processing requirements. Must be easily modulated to meet waveform design requirements. Must be cost effective.
  • 2. Power Amplification Process Amplification Occurs in Multiple Stages  Driver Amplifier  High Power Amplifier o Vacuum Tube Amplifiers – Klystron, TWT o Solid State Power Amplifier – Solid State Power Transistor Requirement for power amplifier  Low noise  Minimum distortion to input signal  The Radar uses two klystrons that offer a total o/p power of 1 MW at 2380 Mega Hertz.
  • 3.  Klystron amplifiers are high power microwave vacuum tubes.  Klystrons make use of the transit-time effect by varying the velocity of an electron beam. A klystron uses one or more special cavities, which modulate the electric field around the axis the tube.  Due to the number of the resonant cavities klystrons are divided up into:  Multicavity Power Klystron  Repeller Klystron
  • 4. Klystron Tubes (Vacuum Devices) MIT/LL Millstone Hill Radar