To minimize the size and weight of structure and to improve the beam spot as well as the transmission, the phasefocusing technique was used without a bulky, externalmagnetic focusing device. Active coaxial and active inverted coaxial magnetron. In an argon ar and oxygen o2 gas mixture, magnetron plasma. Gms 200w solidstate with ntype coaxial output pdf download gms 450w solidstate with 716 coaxial output pdf download gms 900w solidstate with wr340 output pdf download gmp 2 kw magnetron with wr340 output pdf download gmp 3 kw magnetron with wr340 output pdf download gmp 6 kw magnetron with wr340 output pdf download.
Characteristics of a microwave plasma torch with a coaxial. Uhftv transmission shipboard and groundbased radar weapons guidance systems electronic countermeasure ecm systems. In this study, titanium ti was employed as a cathode sputtering target, and a glass tube was used as a substrate. Sairem products malachite technologies san francisco. Because tropospheric scatter tropo in the cm band lies in generating the rf power. Magnetron, coaxial a magnetron with a coaxial resonator around the anode unit and connected by slots with the resonators of the unit. The concept of the magnetron was invented in the 30s by dr. Pdf computer simulations of a megawattclass sband coaxial. 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. A magnetron has a coaxial resonator about the anode unit and is connected by slots with the resonators of the unit. Us3412285a coaxial magnetron with rotatable tuning means. Pdf design of coaxial cavity for high power magnetron. Magnetron transmitter characteristics range kband kaband cband tube coaxial magnetron risingsun magnetron coaxial magnetron peak power 3 kw 50 kw 1 mw pulse width 300 ns 150 ns 2 s variable rf rise time 2 khz 4 khz 2 khz peak voltage 3.
Coupling device for antenna feeder in a magnetron comprising engaged male and female members. Pic simulation of the coaxial magnetron for low energy x. Feeding a waveguide from a coaxial cable is a straightforward way to achieve electromagnetic waves inside a waveguide. Prior art keywords anode tuning coaxial magnetron cavity resonator prior art date 19651020 legal status the legal status is an assumption and is not a legal conclusion. The magnetron according to claim 7 wherein said tuning means comprise split ring members housed within a groove defined near the midpoint of the axial length of said outer wall member. Microwaves can be really dangerous, the magnetron in this video has less than 110 of the power of a domestic microwave magnetron. According to edison tech center, the cavity magnetron is the central part of a microwave.
Index termscoaxial cavity, coaxial magnetron, linear accel. The coaxial cavity in the coaxial magnetron provides some isolation between the spurious noise coupled to the vanes and the output waveguide. Crossed electron and magnetic fields are used in the magnetron to produce the highpower output required in radar equipment. A coaxial air line is operating at 1 mhz the inner radius is ad6mm and the outer radius is bd12 mm assume copper for the conductors. The space between cathode and anode is called interaction space.
Mar 27, 2020 this is the multiple choice questions in chapter 11. Computer simulations of a coaxial magnetron, whose design parameters. Satellite power system sps magnetron tube assessment study. Jmr92257x3, jmr9230s3, jmr92259x3, jmr92256x, jmr92259x, jmr92256xh, jmr92106xh, jmr92106x. Coaxial magnetron article about coaxial magnetron by the. 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. Acronym definition ice immigration and customs enforcement us department of homeland security.
The great advance in magnetron design was the resonant cavity magnetron or electronresonance magnetron, which works on entirely different principles. An effective spurious mode suppression technique is. Coaxial magnetron to perform the coaxial magnetron measurements an asr7 radar transmitter and receiver were obtained. Navy to develop an electronically tuned, pulsed coaxial magnetron oscillator. Modification of microwave oven magnetron showing 1 magnetron stripped of cooling fins and ceramic magnets 2buckboost coil,3coldrolled steel shell,and 4 samarium cobalt magnets insideends of each portion of shell. To read and print pdf files, download adobe acrobat reader. A novel relativistic magnetron with circularly polarized. Sfd349 datasheet, sfd349 datasheets, sfd349 pdf, sfd349 circuit. Characteristics of a microwave plasma torch with a coaxial fieldstructure at atmospheric pressure young s.
The distinguishing feature of the coaxial magnetron is the presence of a high q stabilizing cavity between the anode and the output waveguide. A coaxial magnetron has an external cavity attached to the anode of the conventional magnetron, which stores energy and hence, enhances the qualityfactor q of the device 4, 5. The linking slots are parallel to the axis of the magnetron in the rear walls of each other resonator. Frequencies from 1 ghz to 35 ghz power levels from 100 w to 35 mw.
This paper presents the synthesis of a coaxial cavity for highpower x band coaxial magnetron. Due to its small size and circular shape, the cable contributes significantly to the overall size of. Inner coating of longnarrow tube by plasma sputtering pdf. Its working principle is based on the interaction between electron stream and magnetic field. Miscellaneous, magnetrons beverly microwave division. Cpi, alldatasheet, datasheet, datasheet search site for electronic components. Continuous wave magnetrons are used for plasma processing in the manufacture of semiconductors and in industrial dielectric heating applications. The emphasis on the program was the development of suitable electronic tuning techniques rather than upon tube fabrication to a particular electrical and mechanical specification. For sputter deposition onto the inner surface of a long, narrow glass tube 8mm inner diameter, mm long, a doubleended anode coaxial magnetron pulsed plasma dcmpp reactor 11 was used, in which two cmpp sources were arranged facing each other at each end of the tube. Magnetron coaxial adaptor having a cap which fits over the magnetron output antenna us5369335a en 199112. The magnetron is a highpowered vacuum tube that works as a selfexcited microwave oscillator. Sfd325 datasheet11 pages cpi 60 kw, kuband coaxial. Coaxial cavity magnetron article about coaxial cavity. The essential imperfections of the most effective high power microwave electron devices magnetron oscillators, amplifiers and frequency transformers are.
These multicavity devices may be used in radar transmitters as either pulsed or cw oscillators at frequencies ranging from. Industrial magnetrons toshiba hokuto electronics corporation. Schematic of the coaxial magnetron pulsed plasma cmpp reactor. Coaxial cables the use of coaxial cables extends to every application in which a signal must have a minimum distortion and attenuation or where elimination of external interference plays a leading part. M1430 sband magnetron m1430 is a fixed frequency pulsed type sband magnetron, designed to operate in the frequency range of 3040 to 3060 mhz with a peak output power of 8 kw, it is packaged and coaxial output type and natural or forced air cooled. Titanium coating of the inner of a 1 m long narrow tube by. Coaxial magnetrons are used in various types of ground and airborne radar sets. The use of a coaxial cable helps to prevent many of the problems created by bifilary wires. Introduction the magnetron is a vacuum tube which is used to generate microwaves of high power. Inner coating of longnarrow tube by plasma sputtering. The doubleended coaxial magnetron pulsed plasma dcmpp method with auxiliary outer anode was introduced in order to achieve the uniform coating of nonconductive thin films on the inner walls of insulator tubes. Satellite power system sps magnetron tube assessment. View and download jrc jmr9230s installation manual online.
Computer simulations of a megawattclass sband coaxial magnetron. Microwave tubes and circuits from the book electronic communication systems by george kennedy. A novel relativistic magnetron rm with a circularly polarized te 11 coaxial waveguide mode and its corresponding mode excitation are investigated in this paper. Sfd373 pdf, sfd373 description, sfd373 datasheets, sfd373. For sputter deposition onto the inner surface of a long, narrow glass tube 8mm inner diameter, mm long, a doubleended anode coaxial magnetronpulsed plasma dcmpp reactor 11 was used, in which two cmpp sources were arranged facing each other at each end of the tube. The data should be read in conjunction with the magnetron. Closeup view of magnetron with buckboost coil fitted to waveguide in phase and amplitude tracking test bed. The spurious noise power from coaxial magnetrons is typically 10 to 20 db lower than the noise power from conventional magnetrons of comparable peak power level. The magnetron according to claim 7 wherein said coaxial cavity resonator is operated in the te 011 mode. The coaxial resonator provides the following advantages.
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. Cpi 250 kw, cband coaxial magnetron,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. A highpower, magnetron transmitter heres a new use for your microwave ovens magnetron t he greatest obstacle to overcome in the reactive component of the load changes, working moon bounce eme or the frequency changes accordingly. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Lower frequency slot mode is more susceptible to interfere with the desired mode of coaxial magnetron. Inverted coaxial magnetron how is inverted coaxial. Sfd373 datasheet, sfd373 datasheets, sfd373 pdf, sfd373 circuit. A magnetron is a highvacuum tube containing a cathode and an anode, the latter usually. Cpi 200 kw, xband coaxial magnetron,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Cho pohang university of science and technology, pohang 790784 received 17 february 2005 an atmospheric microwave plasma torch is developed using a dc magnetron at 2. One cavity connected to wave guide through coaxial for output. Weather radar, magnetrons beverly microwave division.
How to test the magnetron in a microwave oven hunker. Hipims, magnetron sputtering, coaxial double magnetron, sideways deposition, cylindrical shaped objects. In this design the oscillation is created by the physical shape of the anode, rather than external circuits or fields. Schematic of the coaxial magnetronpulsed plasma cmpp reactor. Sfd349 pdf, sfd349 description, sfd349 datasheets, sfd349. A magnetron which achieves mode separation, high efficiency, stability, and ease of mechanical tuning by coupling a coaxial high q cavity to a normal set of quarterwavelength vane cavities. In our laboratory, plasma reactors have been developed by using magnetron hollow cathode discharges w8x, coaxial magnetron pulsed discharges zcmpp. Coaxial magnetron in french englishfrench dictionary. Coaxial magnetron market is categorized based on product type, applications, and geography. Identification and suppression of slot modes in a coaxial magnetron. Modifications to the asr7 modulator were necessary since the coaxial magnetron requires that the modulator generate a much slower voltage pulse risetime than the dx276 normally requires. The connecting slots are parallel to the axis of the magnetron in the rear walls of every other resonator.
However the nonlinear beamwave interaction mechanism of magnetron is not well understand 2. The magnetron operates as an oscillator, which is a device that generates oscillatory electric currents or voltages by nonmechanical means. The anode has several cavities that open into interaction space. Magnetron mi 29g 29 of the old russian radar bar lock the magnetron is a highpowered vacuum tube, that works as selfexcited microwave oscillator. A theoretical analysis of the pulse transformer, which is a critical element of the sspm, is carried out. Optimal design of a coaxial cavity based on qualityfactor.
The coaxial cavity in the coaxial magnetron provides some isolation between the spurious. Design and characterization of a synchronous coaxial double. This is the multiple choice questions in chapter 11. M1430 m1430 sband coupler magnetron kw sband coaxial magnetron text. Domestic magnetron to coax adaptor comcokid electrical dec 06. Download the datasheet for information on features and specifications. In this paper, the performance of a developed sspm, which mainly consists of a capacitor charger, an insulatedgate bipolar transistor igbtcapacitor stack and a pulse transformer, is evaluated with a dummy load and an xband magnetron load. Power controllers for packers or food processing equipment. Pdf optimal design of a coaxial cavity based on qualityfactor. Coaxial magnetron gyrotron planar triode highfrequency tetrode diacrode this wide variety of microwave devices has been developed to meet a broad range of applications.