The noise emission from a microwave oven magnetron used in a directional amplifier was determined. Ge spacemaker microwave magnetron tube replacement if you have a ge spacemaker microwave with a bad magnetron tube this page can help. Design of relativistic magnetron for high power microwave. A magnetron is a type of diode vacuum tube in which the filament also serves as the cathode. In 1965, the amana corporation was bought by raytheon, and they made the first homeapplicable model of the microwave oven in 1967. The author put forward the improvement measures on film coating process according to the simulation results. These multicavity devices may be used in radar transmitters as either pulsed or cw oscillators at frequencies ranging from approximately 600 to 95,000 megahertz. I took apart a microwave, and when i saw the magnetron, i conviniently remembered that i had heard that magnetrons were dangerous.
In a conventional electron tube vacuum tube, electrons are emitted from a negatively. Connected to a resonant line, it can act as an oscillator. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the interaction of a stream of. Satellite power system sps magnetron tube assessment study. May 23, 20 the magnetron is a vacuum tube which is used in the generation of microwaves of high power. The magnetron tube is what makes microwaves heat by producing radio waves that excite the water and fat molecules inside the food causing friction. Magnetron, diode vacuum tube consisting of a cylindrical straight wire cathode and a coaxial anode, between which a dc direct current potential creates an electric field.
Welcome to the premier industrial magnetron tubes resource. Benford, history and future of the relativistic magnetron, in proceedings of the international conference on the origins and evolution of the cavity magnetron, bournemouth, uk, april 2010 ieee, 2010, pp. Magnetron has become the most widely used vacuum tube. The average output power is 0 1600 watts to a matched load in the frequency range from 2440 to 2460 mhz. You need to replace the diode anyway when you replace the magnetron, so its really not going to cost extra. Some of these fuses reset once the device cools, some dont. Sputtering magnetron design from angstrom science is a key benefit of all of our custom magnetrons from circular to linear to cylindrical. The amplifier exhibited a spectral noise density of 196db below the carrier, which is a very low level of noise. Multiple magnetron directional amplifiers can be put out together to form what is.
Smc1842cs model is a perfect option for builtin and also fits nicely on a countertop kitchen display. Advanced rf amplifier system solutions crescend technologies. Designing magnetron sputtering configurations for lg problem description magnetron sputtering is used as a plasma processing technique to deposit very thin films onto a substrates for a wide variety of commercial manufacturing and scientific purposes in areas such as optics, electronics and packaging. The magnetron has become a household item since the introduction of microwave ovens into our kitchens. Vacuum tubes disappeared from electronic products years ago. Magnetron vs solidstate industrial microwave dryers. Magnetron tubes remanufacturing services older magnetron tubes can be rebuilt to likenew specifications by the experts at penta labs iso 9001 certified. There are still some other microwave tubes around like the klystrons in some. Custom magnetron designs are why so many oems turn to angstrom sciences. If you have a ge spacemaker microwave with a bad magnetron tube this page can help.
This paper describes the design of an xband magnetron to linear accelerator linac high power transfer system consisting in an 8 resonant cavities magnetron connected to a dedicated vacuum. First magnetron tube was invented in 1940 at englands university by john randall and harry boot. The magnetron system is uniquely designed to work with the 2ohm and 4ohm amplifiers we recommend. Microwave office has revolutionized the communications design world by providing users with a superior choice. Before you buy a new magnetron, replace the diode first. High power magnetron keysight eesof applications keysight. Reheat leftovers or get popcorn ready for movie night with this countertop microwave oven. Its working principle is based on the interaction between electron stream and magnetic field.
If you connect our system to a mismatched amplifier, circuit damage to your amplifier will result. This magnetron was designed for an output microwave frequency of 2. The microwave offers simple one touch controls including a popcorn button so you can sit back relax and wait for your delicious fluffy popcorn to be ready. Bonding pyrolytic graphite to the magnetron anode 711 the manufacture of pyrolytic graphite and its fabrication into radiators 712 magnetic circuit study 715 design of interaction areas of magnetron 719 design of cathode for long life 723 mechanical design of the magnetron 724 projection of the characteristics of the magnetron package 726. Cross section of magnetron design showing permanent magnets. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities cavity resonators. Relativistic magnetron design of the magnetron was done using charged particle simulation technique cst simulation software. Psionic magnetron manifestation tool psionic warriors. The tube is a package magnet type and requires forced air cooling.
Its the magnetron that generates the microwaves that make the food hot. The affordable amplifiers we recommend can be purchased online through sites like amazon and ebay. Magnetrons main components are the filament, magnets, yoke, anode core, cooling fins, vane, and the output antenna. The magnetron tube works on dc direct current power. Chapter 3 discusses the software including a brief description of the 3d code magic. The design of the microwaves chassis made installing this magnetron a pita. Electrons pass by the openings to these cavities and cause microwaves to oscillate within, similar to the way a whistle produces a tone when excited by an air stream blown past its. This study has made it possible to much more accurately define the design of the.
Solidstate technology suitable for radar applications. Pulse power systems are widely used for high power microwave hpm generation, flash xrays fxr production and intense electron beam applications. Sputtering magnetron design custom circular linear. These multicavity devices may be used in radar transmitters as either pulsed or cw oscillators at frequencies ranging from. The most important thing we build is trust automation. The design features of this relativistic magnetron are presented here. Second thing is that an open magnetron tube will cook you and anyone nearby with microwaves, and metal objects will have arcs of mini lightning bolts coming off of them. The magnetron is a vacuum tube which is used in the generation of microwaves of high power. The new magnetron sputter version of opera provides a complete suite of threedimensional 3d tools for the finite element modeling, simulation, analysis and optimisation of magnetron sputtering equipment. A type of vacuum tube used as the frequency source in microwave ovens, radar systems and other highpower microwave circuits. Cobham introduces simulation software for designing magnetron. The filament and anode body are packed into a single device together with permanent magnets and, is some cases, additional electromagnetic coils, which permit to control and vary the output power of the magnetron. Almost certainly there is a microprocessor driving the display and keys to enter the timepowerstartstop and so on. When the magnetron gets to hot, it shuts off power to the device.
Lia400 system a repetitive pulse power system was developed which. Say good bye to the last vacuum tube product electronic design. A wide variety of manufacturers, distributors and service companies are featured in our extensive vertical directory to allow ease sourcing and research for magnetron tubes. Satellite power system sps magnetron tube assessment. The magnetron injection gun mig is an important component in a gyrotravelling wave tube. The result s hows that it is feasible and convenient to use three dimensional tool in the simulation of trajectory of electrons in a magnetron sputtering system. Ge spacemaker microwave magnetron tube replacement. There is a slim chance that this peice has failed and thats why the magnetron isnt working. You can replace the fuse, temp rating is usually written on the device itself. Magnetron sputter coater design software design flexibility with the opera software the user has complete freedom to specify the device. All types of magnetron can be designed, be they circular, rectangular, balanced or unbalanced varieties. Magnetron sputtering design there is much more to designing a worldclass magnetron than simply strapping some magnets into a watercooled cavity and hoping for the best. Simulation of the trajectory of electrons in a magnetron. Home built desktop dc magnetron sputtering machine youtube.
The magnetron is called as cavity magnetron because the anode is made into resonant cavities and a permanent magnet is used to produce a strong magnetic field, where the action of both of these make the device work. The psionic magnetron manifestation tool is powerful and gets the results that you want quickly and easily. Mar 18, 2018 what is this in this video, i look at a microwaves radiation emitter. The sizes of the cavities determine the resonant frequency, and thereby the frequency of emitted microwaves. The magnetron is a highpowered vacuum tube that works as a selfexcited microwave oscillator. Crossed electron and magnetic fields are used in the magnetron to produce the highpower output required in radar equipment.
Electrons pass by the openings to these cavities and cause microwaves to oscillate within, similar to the way a whistle produces. The microprocessor requires a power source and this is one of the first things to suspect as being faulty if the unit doesnt work. This paper proposes a particular design technique of an xband magnetron to linear accelerator. Magnetron, and microwave electrical engineering stack exchange. Solid state power provides pure, clean rf heating with a rated lifetime of over 500,000 hours of use, versus only the few thousand hours typical of a magnetron. When my microwave started cutting out, all it took was a good magnetron cleaning to get it running again.
The solidstate transmitter also is found to output generally less thermal noise and fewer spurious signals than a vacuum device. The software has been validated prior to release in cooperation with two commercial sputter coating companies. Microwave office rfmicrowave design software is the industrys fastest growing microwave design platform. Products include microwave components, antennas,and plasmas to high speed digital system and accelerators. Tyne gives examples of early experiments on tubes where magnetic fields generated by solenoids control the flow of electrons. A brief look at what a magnetron actually consists of is worth a look. Chapter 2 discusses the theory of magnetron operation, discussing design parameters, the bunemanhartree condition, and magnetron operation with a solid cathode. To me, the device is an educated vacuum tube diode with construction something like this. It is typically used on microwave application that makes use of both electrical and magnetic current to produce an instant heat. Simple, easy and cheap home built dc magnetron sputtering machine but has enough potential to deposit smooth and uniform reflective copper film. Operas efficiency also allows the analysis of multitarget coaters, where the additional complication of. A relativistic magnetron based upon axial extraction method has been designed and developed for linear induction accelerator400 lia400. Broadband twtas are particularly notorious for their ability to output substantial power as harmonic content when operating at their fullrated capacity, in some cases putting out as much or more power at the second harmonic than is realized at the fundamental.
I decided to research this a bit further i know, great timing and i found that some magnetrons contains berilyum oxide, which is fatal if you breathe it in. To improve the efficiency of the mig design process, a design tool based on ansys workbench combining. Techx designing magnetron sputtering configurations for lg. Pdf design and simulation of 8cavity holeslot type magnetron in. In radar, magnetrons can be used as the signal source to feed the power stage of the radar transmitter, typically a klystron tube. A magnetic field is applied longitudinally by an external magnet. It is built on a proven design that has worked for centuries but is now been updated with the latest radionics and sciatic research.
Computational design and optimization of a magnetron. This is the second time i have replaced this magnetron so the average 7 year lifespan of the tube seems to be about right. Its services unit provides development and design, simulation,measurement and education. The installation was a little sketchy because of the design of the oven but taking out about 2 more screws than i wanted to made it go in much more easily. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field. Magnetron article about magnetron by the free dictionary. The first ever commercial model was created in 1954 but it didnt perform well with regards to sales. Microwave design free microwave design software download. Also check that the cooling fan, if any, is working, has a free air path, and is pointed at the magnetron fins. Buildup of kitchen grease on them can make the magnetron run too hot. The history of the microwave oven home stratosphere. Aug 24, 20 simple, easy and cheap home built dc magnetron sputtering machine but has enough potential to deposit smooth and uniform reflective copper film. What is this in this video, i look at a microwaves radiation emitter.
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