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Reflex klystron diagram

- Functional diagram of a reflex klystron. Three power sources are required for reflex klystron operation: (1) filament power, (2) positive resonator voltage (often referred to as beam voltage) used to accelerate the electrons through the grid gap of the resonant cavity, and (3) negative repeller voltage used to turn the electron beam around Reflex klystron is a single cavity klystron that can be used as low power microwave oscillator. Due to the DC voltage in the cavity, a Radio Frequency (RF) noise is generated. The electron beam injected from the cathode is velocity modulated by the cavity gap voltage

Reflex Klystron As shown in the given diagram it is composed of heater, cathode, focusing electrodes and repeller anode. All these components are enclosed in a glass envelope. After the focusing electrodes there is a cavity resonator which encircles the glass envelope Reflex Klystron used as a low-power Microwave oscillator 2. Multi cavity klystron used as low-power microwave amplifier REFLEX KLYSTRON REFLEX KLYSTRON REFLEX KLYSTRON Single Re-entrant cavity as a resonator. Applegate diagram The electrons B which encountered the positive half cycle of the RF field in the cavity gap d will be accelerated. Definition: A Reflex Klystron is a specialized low power vacuum tube used to produce oscillations at microwave frequency. Its principle of operation is velocity and current modulation. Klystrons are basically specialized tubes used as amplifiers and oscillators at microwave frequency range

The Reflex Klystron - tpub

The reflex klystron (also known as a Sutton tube after one of its inventors, Robert Sutton) was a low power klystron tube with a single cavity, which functioned as an oscillator.It was used as a local oscillator in some radar receivers and a modulator in microwave transmitters the 1950s and 1960s, but is now obsolete, replaced by semiconductor microwave devices The operation of reflex klystron is a little bit different from the two-cavity klystron because there is only one cavity. This single cavity is work like a buncher as well as catcher cavity. First of all, consider an electron A which passes through the resonator gap when the voltage across the gap is zero The reflex klystron contains a reflector plate, referred to as the repeller, instead of the output cavity used in other types of klystrons. The electron beam is modulated as it was in the other types of klystrons by passing it through an oscillating resonant cavity but here the similarity ends There are two configurations for a low-powered klystron. One is a low-power microwave oscillator (Reflex Klystron) and the second is a low-power microwave amplifier (Two Cavity Klystron or Multi Cavity Klystron).. What is a Reflex Klystron Oscillator? Before answering this question, we need to know how the oscillations are generated.To generate the oscillations, we need to give positive. Reflex Klystrons: * A schematic diagram of a reflex klystron is shown in Fig. 20. The velocity-modulation process takes place as before, but analysis shows that in the retarding field used to reverse the direction of electron motion, the phase of the current wave is exactly opposite to that in the two-cavity klystron

Reflex Klystron Oscillator Theory - Electronics and

Klystron - Multi Cavity Klystron, Reflex Klystron, Working

-schematic circuit diagram-mechanism of operation-velocity modulation process-bunching process-calculation of efficiency, mutual conductance and voltage gain. 2. Explain about the reflex klystron.-schematic diagram-velocity modulation process-power output &efficiency-frequency characteristics.-electronic admittance of reflex klystron. 3 Reflex Klystron is one of the most commonly used microwave (low power) generators. It converts D.C. power into microwave power. Reflex Klystrons Oscillator: The schematic diagram of a reflex klystron tube is shown in Fig. 4.1, which uses only a single re-entrants microwave cavity as resonator

  1. Reflex klystron is also known as a 'Sutton' klystron. This name is given by the name of its inventor Robert Sutton, It allow the passage of electron beam through a single resonant cavity. Now understand the concept of Reflex klystron in microwave engineering in details through following questions and answers
  2. - Functional diagram of a reflex klystron. /p> Three power sources are required for reflex klystron operation: (1) filament power, (2) positive resonator voltage (often referred to as beam voltage) used to accelerate the electrons through the grid gap of the resonant cavity, and (3) negative repeller voltage used to turn the electron beam around
  3. Block Diagram: THEORY: The reflex klystron is a single cavity variable frequency microwave generator of low power and low efficiency. This is most widely used in applications where variable frequency is desired as 1. In radar receivers 2. Local oscillator in μw receiver
  4. The theory of the two-cavity klystron can be applied to the nalysis of the reflex klystron with slight modification. A schematic diagram of the reflex klystron is shown in Fig. 9-4-1. The electron beam injected from the cathode is first velocity-modulated by the cavity-gap voltage
  5. 2 a) With the help of Applegate diagram describe the bunching process in a two cavity klystron amplifier and derive the bunching parameter. (8) b) A reflex klystron operates under the following conditions: V o =500V, R sh =10KΩ, f r = 8 GHz, L =1 mm, e/m = l.759 x 10 11 (MKS system) The tube is oscillating at f
  6. Reflex klystron is a microwave device that works on principle of velocity modulation in addition to current modulation. Reflex klystron is also known as a 'Sutton' klystron . This name is given by the name of its inventor Robert Sutton, It allow the passage of electron beam through a single resonant cavity

The reflex klystron. is based around an electron gun. (similar to a cathode ray tubes, valves (or tubes as they are referred to across the pond) etc.) A cloud of (thermionic) electrons is generated by heating a filament inside a vacuum tube. This filament is connected to a cathode Let us understand klystron and gunn oscillator based microwave test benches. Klystron Microwave Test Bench block diagram with components. The figure-1 depicts klystron microwave test bench. It consists of klystron power supply, klystron mount tube, isolator, variable attenuator, frequency meter, slotted line section, VSWR meter and load the reflex klystron (repeller klystron). The reflex klystron contains a reflector plate, referred to as the repeller, instead of the output cavity used in other types of klystrons. The electron beam is modulated as it was in the other types of klystrons by passing it through an oscillating resonant cavity but here the similarity ends. Th

Working : The RF voltage that is produced across the gap by the cavity oscillations act on the electron beam to cause velocity modulation. er is the reference electron taken as the one that passes the gap on its way to the repeller at the time when the gap voltage is zero and going negative Reflex Klystron Amplifier. The reflex klystron is also called as Sutton tube invented by Robert Sutton. It is a low power tube with a single and work as an oscillator. The reflex klystron amplifier is used as an oscillator in a modulator in microwave transmitters and radar receivers. But, these devices are replaced by semiconductor microwave. diagram. action the average oscillator. similar is ground. which time t,. is an time tb radio-frequency time t. later time a If the reflex klystron is oscillating, or if energy is coupled into the cavity resonator from an external source, then a voltage will exist across the resonator gap..

The theory of the two-cavity klystron can be applied to the analysis of the reflex klystron with slight modification. A schematic diagram of the reflex klystron is shown in Figure 1. The electron beam injected from the cathode is first velocity-modulated by th A reflex klystron consists of an electron gun, a cavity with a pair of grids and a repeller plate as shown in the above diagram. In this klystron, a single pair of grids does th A reflex klystron is an obsolete type in which the electron beam was reflected back along its path by a high potential electrode, used as an oscillator. The name klystron comes from the Greek verb κλύζω ( klyzo ) referring to the action of waves breaking against a shore, and the suffix -τρον (tron) meaning the place where the action.

• Klystron, including the reflex and multicavity klystron A cross-sectional diagram of a planar triode is shown in Figure 6.7. The envelope is made of ceramic, with metal members penetrating the ceramic to provide for connec-tion points. The metal members are shaped either as disks or as disks with cylindrica A reflex klystron consists of an electron gun, a cavity with a pair of grids and a repeller plate as shown in the above diagram. In this klystron, a single pair of. 5 Mar Reflex klystron amplifier used in microwave systems for generating higher frequency that we can used further for various purposes in

3 With the help of diagrams, clearly explain the principle and operation of rotary phase shifter. 4 (a) What is reciprocal effect? (b) Explain the construction and working of a rotation isolator using reciprocal effect. 5 (a) Draw the electronic admittance diagram of reflex klystron and explain A reflex klystron consists of an electron gun, a cavity with a pair of grids and a repeller plate as shown in the above diagram. In this klystron, a single pair of grids does the functions of both the buncher and the catcher grids. The main difference between two cavity reflex klystron amplifie

Fig. 4 - Schematic diagram of reflex klystron. Conditions for Oscillation In general, the condition for optimum operation of a reflex klystron is the same as for the two-resonator klystron, namely, the center of the bunches in the stream should pass through the catcher when the catcher field has its greatest retarding effect A cavity can be made to fulfill the FREQUENCY STABILIZATION OF A REFLEX KLYSTRON OSCILLATOR 7 conditions (6) by gradually drilling out the coupling holes, eacl~ time checking the results. The direct influence of the modulation on the klystron through the micro- waves reflected from the cavity should, of course, be avoided One major type is the reflex klystron, which is used primarily as an oscillator. For this article, however, we will focus on another popular type: the two-cavity klystron. Principles of Two-Cavity Klystrons Two-Cavity Klystron Geometry. The two-cavity klystron utilizes an electron source (heater), an anode, and a cathode like a conventional. Diagram of a reflex klystron: (1) cathode, (2) focusing cylinder, (3) electron stream, (4) accelerating grid, (5) cavity resonator, (6) resonator gap, (7) reflector, (8) second resonator grid, (9) first resonator grid, (10) vacuum-tight ceramic window serving as lead-out for ultrahigh frequency energy from resonator, (11) resonator voltage supply, (12) heater power supply, (13) reflector voltage suppl

What is a Reflex Klystron? Definition, Construction

1. REFLEX KLYSTRON CHARACTERISTICS AIM: To study the mode characteristics of the reflex klystron tube and to determine its Electronic tuning range. EQUIPMENT REQUIRED: 1. Klystron power supply - {SKPS - 610 } 2. Klystron tube 2k-25 with klystron mount - {XM-251} 3. Isolator {X 1-625} 4. Frequency meter {XF-710} 5. Detector mount {XD-451} 6 3. What are the applications of reflex klystron? Understand 3 4. State the characteristics of the two-cavity klystron amplifier. Remember 3 5. Compare TWT& Klystron amplifier. Understand 3 6. Draw the schematic diagram of helix travelling wave tube? Understand 3 7. What is meant by reflex klystron? Remember 3 8

Klystron - Wikipedi

  1. Applegate diagram for the Reflex Klystron Oscillator. 5. Obtain relation between repeller voltage and frequency of operation of Reflex Klystron Oscillator.. 6. What are modes in Reflex Klystron oscillator? Sketch output power and frequency of Klystron versus repeller voltage for Reflex Klystron. 7
  2. A schematic diagram of the reflex klystron is shown in Fig. • 0 = Time for electron entering cavity gap at z = 0 • 1 = Time for same electron leaving cavity gap at z = d • 2 = Time for same electron returned by retarding field z = d and collected on walls of cavity MR
  3. performance of the given Reflex Klystron tube. 32 9 Test the performance of Gunn Diode for the following aspects i. V-I characteristics ii. Output power and frequency as a function of voltage. 35 10 Use Doppler RADAR to detect the maximum range. 3
  4. This type of klystron oscillator is called a reflex klystron because of the reflex action of the electron beam. Figure 3: circuit diagram with a repeller klystron Three power sources are required for reflex klystron operation: 1. filament power, 2. positive resonator voltage (often referred to as beam voltage) used t
  5. als of electrodes are in the form of discs extending through the glass.
  6. Reflex Klystron: So basically what was the need for reflex klystron when we had multicavity klystron? Lets consider 2-cavity klystron oscillator.For proper working as an oscillator the output voltage needs to be fed back to the input and if positive feedback is taken then only the klystron will oscillate.But 2-cavity klystron oscillator is not used because the slight change in frequency is.
  7. Of The Reflex Klystron Tube Apparatus: Klystron Power Supply, Klystron with mount, Isolator, Frequency meter, Variable Attenuator. Block Diagram: Three power sources are required for reflex klystron operation: Filament power, Positive resonator voltage often referred to as bea
Klystron Microwave Test Bench | Gunn Microwave Test Bench

The paramount O type tube is the two cavity klystron followed by the reflex klystron. Slow wave structures are also O-type but have non-resonant periodic structures for electron interactions. Twystron is a hybrid amplifier which uses a combination of klystron and Slow wave structures 2. Switch 'on' klystron power supply and cooling fan switch 3. Switch 'on' the beam voltage and set the beam voltage to 300V 4. Adjust the reflex klystron voltage to get some deflection in VSWR meter 5. Maximize the deflection by tuning AM amplitude, freq control of power supply and reflector voltage. 6

A Gunn diode oscillator or a Reflex Klystron tube could be an example for this microwave signal generator. Precision Attenuator. This is the attenuator which selects the desired frequency and confines the output around 0 to 50db. This is variable and can be adjusted according to the requirement Reflex klystron:used as a low power microwave oscillator ; Thus basically klystron amplifiers possess less power than their counterparts magnetron and travelling wave tube. So lets see 2-cavity klystron amplifier first..... Two Cavity Klystron Amplifier 2-cavity klystron amplifier works on the following principles. Velocity modulatio • Reflex klystron: It is used as oscillator. The figure-1 depicts two-cavity klystron. As shown electron beam is generated by electron gun which passes through the space between input cavity (i.e. Buncher cavity) and output cavity (Catcher cavity). The RF signal to be amplified is coupled to input cavity FM Transmitter Block Diagram For Microwave. Microwave Transmitter. The main components of a microwave transmitter are a microwave power source, a modulator, and , if necessary, a power amplifier. Among the vacuum-tube power sources, the reflex klystron and the backward-wave oscillator are frequency-modulated, and the magnetron is pulse. To study mode characteristics of a reflex klystron and hence to determine mode number, transit time, electronic tuning sensitivity (ETS) and electronic tuning range (ETR) To study the characteristics of wave propagation in a waveguide by studying standing wave pattern and hence to plot ω - β diagram and verify the relationship between guide.

Reflex Klystron Amplifier - Electronics Club Microwave

  1. Fig. 1: Schematic Diagram of RKO II. Positive Feedback in Reflex Klystron To explain the phenomena of oscillations in a Reflex Klystron, let us refer to an idealized configuration of the system as shown in fig. 1. The vital features of the reflex oscillators are, (1) the initial periodic wave generated when the klystron is switched on, (2) th
  2. Describe working of Reflex Klystron amplifier with a neat diagram. Description : Describe working of Reflex Klystron amplifier with a neat diagram. Answer : Operation: It is assumed that the oscillations are set up in the tube initially due to noise or switching transients and these oscillations are sustained by device operation
  3. Find out information about Applegate diagram. A graph of the electron paths in a two-cavity klystron tube, showing how electron bunching occurs. McGraw-Hill Dictionary of Scientific & Technical Terms,..

Klystron - Radartutoria

3b.Explain function of reflex klystron with the help apple gate diagram. 3c. Explain structure and effects of various fields' acts on electron moving in the magnetron tube. 3d.Describe working of Travelling Wave Tube as an amplifier. 3e. Explain π mode oscillation and define frequency pushing and pulling. 3f. Explain two cavity klystron with. A field modulation, paramagnetic resonance spectrometer in use as a wide band Instrument employs a reflex klystron. The frequency of the klystron has been stabilized to at least one part in one quarter million, over a period of a few hours, to the resonant frequency of a microwave cavity. A variation of the A.C. Pound stabilizing circuit was employed. With field stabilization, this frequency. Basic block diagram of radar system. Radar performance factors: Radar range equation, factors influencing max. Range, effect of noise. Basic pulse Radar system: Block diagram & description. Antenna scanning & Tracking (Definition, types and principle) of Antenna scanning: Horizontal, vertical, helical and spiral This type of klystron oscillator is called a reflex klystron because of the reflex action of the electron beam. Figure 5: Wiring with a repeller klystron, and an example given low power repeller klystron tube Repeller klystrons are often used in older radar sets as local oscillators or as oscillators in measurement sets

Klystron Tube: What is it? (Types And Applications

Reflex Klystron Oscillator Theory; B-H Curve for Magnetic Material; FM Recording Block Diagram and Working; Methods of Recording in Instrumentation; Parameters in Magnetic Recording on Tape; Tape Recorder Working Principle August (9) July (13) June (16) May (19) April (27) March (31 diagram (digital) 5. Numerical Aperture determination for Fibers 6. Attenuation Measurement in Fibers MICROWAVE EXPERIMENTS 1. Reflex klystron or Gunn diode characteristics and basic microwave parameter measurement such as VSWR, frequency, wavelength. 2. Directional Coupler Characteristics. 3. Radiation Pattern of Horn Antenna. 4

klystron power supply, Micro-Now Model . 756. The antennas were fabricated and tested in the lab and the results obtained are reported. The operation of the Model . 756 . power supply is also outlined in detail REFLEX KLYSTRON. Single Re-entrant cavity as a resonator. The electron beam . emitted. from the cathode is . accelerated. by the grid and passes through the cavity anode to the repeller space between the cavity anode and the repeller electrode . The . feedback. required to maintain the oscillations within the cavity is obtained by . reversing. The reflex klystron will continue to oscillate if the electrons remain in the repeller field longer than 3/4 cycle (as long as the electrons return to the grid gap when the field is of the proper polarity to decelerate the electrons) This diagram shows the electrode system of a reflex klystron structure. The repeller electrode directs the electrons back towards the cathode. The cavity with gap acting as buncher for electrons coming from the electron gun and as catcher for electrons pushed back by the repeller. Bunching occurs along the way from the cavity to the vicinity of. Reflex klystron Construction A reflex klystron consists of an electron gun, a cavity with a pair of grids and a repeller plate as shown in the above diagram. In this klystron, a single pair of grids does the functions of both the buncher and the catcher grids. The main difference between two cavity reflex klystron amplifier and reflex klystron.

The Varian brothers called their invention a klystron. Another invention of the Varian brothers was the reflex klystron tube. In this tube, electrons emitted from the heated cathode travel through the cavity grids toward the repeller plate, then are repelled and returned back the way they came (hence the name reflex ) through the cavity grids Question is ⇒ In a reflex klystron oscillator, repeller electrode is at, Options are ⇒ (A) low positive potential, (B) high positive potential, (C) negative potential, (D) zero potential, (E) , Leave your comments or Download question paper cavity Klystron Amplifier. Also give its typical specifications. (10) 2 a) How oscillation generate in reflex klystron? (5) b) With the help of applegate diagram describe the bunching process of two cavity klystron amplifier and derive the bunching parameter also. (10) 3 a) A reflex Klystron operates under following Conditions: a) Klystron amplifier. b) Reflex klystron oscillator. c) Twt. d) Magnetron . Q8. A line is excited by a 100 v dc source. If reflection coefficients at both ends are 1 each then. a) There will be no oscillations on line. b) There will be only 1 or 2 oscillations on line. c) There will be a finite number of oscillations on lin

For low power amplification usually reflex klystron oscillator itself is sufficient. For high power amplification either push-pull disk seal triode type or TWT power amplifiers are used. Travelling wave tube amplifiers provide high power amplification at high frequencies than the semiconductor devices. That is why normally TWT amplifiers are used 1.g) Compare the efficiencies of two cavity klystron and Reflex Klystron? The maximum electronic efficiency of two cavity klystron is 58% .The maximum electronic efficiency of reflexive klystron is 22.7%. In general efficiency of two cavity klystron is about 40%. In general efficiency of reflex klystron is about 30% Block diagram. EXPERIMENT 07. MESUREMENT OF FREQUENCY AND WAVELENGTH . AIM: To determine the frequency and wavelength in a rectangular waveguide . working on TE10 model . APPARATUS REQUIRED: Klystron power supply, Reflex klystron isolator, frequency meter, variable attenuator, slotted section, VSWR meter, detector mount & CRO 22. State the Applications of Reflex Klystron PART - B 1. (i) Describe with the neat sketch the constructional details and principle of operation of a reflex klystron tube. With the help of Applegate diagram illustrate the phenomenon of bunching. (ii) Derive expression for bunched beam current and efficiency CHARACTERISTICS OF REFLEX KLYSTRON AIM : To study the Reflex Klystron oscillator characteristics. APPARATUS : 1.Klystron Power supply 2. Klystron tube with mount 3. Isolator 4. Variable Attenuator 5. Frequency Meter 6. Slotted section 7. Detector Mount 8. CRO & CRO probes 9. Cooling Fan BLOCK DIAGRAM : MODEL GRAPH : PROCEDURE : 1

What is Reflex klystron Explain its operation with a neat diagram. What are the limitations of conventional vacuum tubes to operate at microwave frequencies. [8+71 What is Gunn effect. Explain the operation of Gunn diode. Explain the principle of working for Two - Cavity Klvstron with Velocitv diagram. [8+71 What is need of Helis in I WT Klystron tube, Klystron power supply, Klystron mount, Isolator, Frequency Meter, Variable Attenuator, Detector mount, Wave guide stand, Cooling fan, VSWR meter, Cables and accessories. Theory: The Reflex Klystron makes the use of velocity modulation to transform a continuous electron beam into microwave power

Klystron - an overview ScienceDirect Topic

5 a) Describe the construction and working of a reflex klystron. Explain how velocity and current modulation takes place using the applegate diagram. [9] b) What is meant by applegate diagram? Explain about bunching in two cavity klystron. [6] 6 a) Explain the mechanism of oscillations in Magnetron oscillator with the aid o Option D: velocity modulation diagram Q20. The transact time in the repeller space of a Reflex Klystron must be n+3/4 cycles to ensure that Option A: Returning electrons give energy to the gap oscillations Option B: Electrons are accelerated by the gap voltage on their return Option C: It is equal to the period of cavity oscillation 5 With the help of Applegate diagram, explain the operation of a reflex klystron; show that the theoretical efficiency of reflex klystron is 27.78%. 6 (a) Explain the growth of oscillations in a traveling wave magnetron. (b) Compare the features of rising sun magnetron with cavity magnetron. 7 (a) What is Gunn effect

Reflex Klystron working, oscillator and Applegate diagram

27] Fine adjustments of a reflex klystron are accomplished by: a} Adjusting the flexible wall of the cavity. b} Varying the repeller voltage.@@ c} Adjusting the AFC control system. d} Varying the cavity grid potential. 28] The pulse repetition rate (PRR) refers to: a} The reciprocal of the duty cycle 8.5 to 9.7GHz reflex klystron, 25mW output through a small coaxial probe from the octal base. Improved design 723A/B, from which it differs for the more extended tuning range. Sometimes available with dual marking 723A/B / 2K25: actually a 2K25 underutilized when replacing the first one

Reflex Klystron - Applegate diagram - Operaton - YouTub

  1. the difference being that a Gunn diode has no PN junction, and operates like a solid state version of a reflex klystron. other klystron-like diodes used for microwave applications are IMPATT, TRAPATT and BARITT diodes that all use bunches of charge carriers propagating with a known transit time across the junction
  2. Microwave Sources and Devices -Reflex Klystron, Magnetron, TWT, Gunn diode, IMPATT diode, Crystal Detector and PIN diode. Radar - block diagram of Radar, frequencies and power used, Radar range equation. UNIT-VIII Analog modulation and demodulation - AM, FM and PM, Principle of super heterodyne receiver
  3. The Reflex klystron is a single cavity variable frequency microwave generator oscillator. It has low power and low efficiency. It has electron gun similar to that of two cavity klystron but it is smaller. As the size is small, the beam does not require focusing. The two cavity klystron was not used because the oscillation of frequency is varied
  4. Reflex klystron amplifier ; What You need To know About Klystron. Interaction of the electron in the klystron occurs only at the gaps of a few resonant cavities. Klystron circuit is a resonant type. The wave in klystron is not propagating wave. Klystron uses cavities for input and output circuits and is a narrow band device

EC 1403 MICROWAVE ENGINEERING Two Marks Questions With

  1. Block Diagram of Large-Signal Disk-Electron Klystron Program.. Disk Model of Electron Beam.. Polar Phase Plot of 20 Electron Disks Advancing from the Input Cavity (Inner Ring) to the Output Cavity (Outer Ring).. Waterfall Diagram Showing Computed Decrease in Kinetic Energy of Bunched Electrons as the
  2. What is the principle of two cavity Klystron amplifier? Remember 3 3. What are the applications of reflex klystron? Understand 3 4. State the characteristics of the two-cavity klystron amplifier. Remember 3 5. Compare TWT& Klystron amplifier. Analyze 3 6. Draw the schematic diagram of helix travelling wave tube? Understand
  3. A reflex klystron consists of an electron gun, a cavity with a pair of grids and a repeller plate as shown in the above diagram. To understand the operation of a reflex klystron I think you need to start with a basic understanding of a tuned circuit made up from a capacitor. 25dia120 energy of the electron beam amplifies the signal, and the amplified signal is taken from a cavity at the other.

Important Question and Answers on Reflex Klystron with

reflex klystron , integral cavity , aperture coupled series capacitor , path open short circuit terminator series inductor . path shorted unidirectional attenuator— idb in main direction 10 db in opposite direction circular waveguioe , rectangular waveguide , ridged optical and acoustical devices general bel 5. Switch 'ON' the Klystron power supply, VSWR meter and cooling fan. 6. Rotate the meter switch of power supply to beam voltage position and set beam voltage at 300 V (you should not make beam voltage higher than 300V) with help of beam voltage knob (you should not touch this knob till the end of the experiment) A Gunn diode oscillator or a Reflex Klystron tube might be an instance for this microwave signal generator. Precision Attenuator. This is the attenuator which chooses the preferred frequency and limits the output around 0 to 50db. This is variable and can be attuned according to the requirement What are the applications of Reflex klystron? Remember 3 13 Determine the dc velocity of the electron when the applied anode voltage is 1000 volts. Evaluate 3 14 Draw the Applegate diagram for a Reflex klystron operating in 1 ¾ mode. Remember 3 15 Compare TWTA and Klystron amplifier Understand 3 16 Name different methods of generating.

6BM6 @ The Valve MuseumWhat is a Reflex Klystron? Definition, ConstructionQKK1789 @ The Valve Museumcm-TechnikCV67 Reflex Klystron, Velocity Modulated OscillatorSchematic of (a) the reflex klystron, showing the

3 (a) Explain the working and operation of reflex Klystron. (b) A reflex Klystron operates at the peak mode of n = 2 with Beam voltage V o = 300 V Beam current I o = 20 mA Signal Voltage V 1 = 40 V Determine : (i) The input power in watts (ii) The output power in watts (iii) The efficiency. UNIT - IV. 4 The coupling factor of the main cavity was mechanically variable. This tube is normally used as a local oscillator with a nominal power output of 50 mW in a frequency range from 85Q0 to 9600 MHz. 3.1.1 Reflex Klystron Mode Diagram The schematic diagram of the basic microwave test setup is shown in Eig. 3,1 modulation of a reflex klystron is shown in the block diagram of Figure IX-8. Fig. IX-8 Block diagram of circuit for study of the sub-carrier modulation of a reflex klystron. The 20 Mc sub-carrier can be either frequency-or amplitude-modulated. The output of the modulation amplifier is applied to the repeller grid of. Study of the characteristics of a Reflex Klystron oscillator. Study of Gunn - Oscillator characteristics using X- band wave guide test bench. Measurement of coupling factor, Directivity, Insertion loss and Isolation of a Directional coupler using X- band wave guide test bench set up Schematic diagram of a reflex klystron (B is the electron has a larger conducting cross section than the FET giving accelerating anode, C the grids, R the resonant cavity and D the higher current levels and consequently more power than the repeller electrode). solid state device and therefore a useful power level in the.

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