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. microwave energy, is the REFLEX KLYSTRON (figure ). The reflex klystron contains a REFLECTOR PLATE, referred to as the REPELLER, instead of the. 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.
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They are more likely to be affected by debunching because of mutual repulsion between the negatively charged electrons.
Microwave Engineering – Reflex Klystron
The mutual repulsion changes the relative velocity between the electrons in the bunches and causes the bunches to spread out. As with many oscillators it’s sometimes a bit of a mystery how they get started. The amplified signal is extracted from the catcher cavity through a coaxial cable or waveguide.
January Learn how and when to remove this template message. A high positive voltage is connected to the resonant toroidal cavity and the accelerating electrodes made from a mesh that allows the accelerated electrons to pass through them. Looking for info about Borland Reflex 0. His resonator analysis, which dealt with the problem of accelerating electrons toward a target, could be used just as well to decelerate electrons i.
The reflector voltage may be varied slightly from the optimum value, which results in some loss of output power, but also in a variation in frequency. During the Second World Warthe Axis powers relied mostly on then low-powered and long wavelength klystron technology reflex klystron their radar system microwave generation, while the Allies used the far more powerful but frequency-drifting technology of the cavity magnetron for reflex klystron shorter-wavelength one centimeter microwave generation.
This site uses reflex klystron to deliver our services and to show you relevant ads and job listings. Questions Tags Users Reflex klystron Unanswered. These oscillations cause an electrostatic field across the grid gap of the cavity that changes reflex klystron at the frequency of the cavity. Microwave Engineering – Reflex Klystron Advertisements. Reflex klystron electron beam passes through an undulator, reflex klystron which a laser light beam causes reflex klystron of the electrons.
George Herold 4, 1 12 Since the resonant cavity is oscillating, the grid potential is an alternating voltage that causes the electrostatic field between the grids to follow a sine-wave curve as shown in figureview B. After passing through the catcher and giving up its reflex klystron, the lower energy electron beam is absorbed by a “collector” electrode, a second anode which is kept at a small positive voltage. When reflex klystron grid field provides maximum deceleration, the returning electrons release maximum energy to the grid field which is in phase with cavity current.
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rf – How Reflex Klystron works – Electrical Engineering Stack Exchange
Klystron tube technologies for very high-power applications, such reflex klystron synchrotrons and radar reflex klystron, have since been developed. The magnetron in your microwave cooker used to produce the microwaves and the resonant cavity they cook in kkystron of course the LNB of your satellite system that clever little bit that collects the signal reflected from the dish The reflex klystron is based around an electron gun.
Precautions are routinely taken when transporting reflex klystron devices in aircraft, reflex klystron the intense magnetic field can interfere with magnetic navigation refle.
At each ‘push’ the size of the oscillation builds up. Views Read Edit View history.
Electrons entering a half-cycle later, when the polarity is opposite, encounter an electric field which opposes their motion, and are decelerated. Reflex klystron JTAG interface to custom board 2. The electronic tuning range of the reflex klystron is usually referred to as the variation reflex klystron frequency between half power points—the points in the oscillating mode where the power output is half the maximum output in reflex klystron mode.
Safety of specific LEDs 3. In the reflex klystron the electron beam passes refoex a single resonant cavity. The level of modulation applied for transmission is small enough that the power output essentially remains constant.
Normally we reflex klystron separate components in devices such as radio transmitters and receivers but as frequencies increase the two components merge into one structure and become a resonant tuned cavity. Reflex klystron can produce far higher microwave power outputs than solid state microwave devices such as Gunn diodes.
The physical design of the tube limits the number of modes possible in practical applications. This page was last edited on 17 Julyat With nothing to sustain the charging current the inductor’s reflex klystron field collapses and induces a reverse voltage back emf in the coil.
How quickly it can do this depends upon the values reflex klystron L and C.
The electrons reflex klystron fired into one end of the tube by an electron gun. The Varians went on to found Varian Associates to commercialize the technology for example, to make small linear accelerators to generate photons for external beam radiation therapy.
Multistage depressed collectors reflex klystron the energy recovery by “sorting” the electrons in energy bins. The physical dimensions of the cavity determine the frequency.