Multirange o-type device
FIELD: multirange microwave devices for radar stations.
SUBSTANCE: proposed multirange O-type device used for radar stations to replace separate devices for each range thereby simplifying station design and reducing its cost is assembled of electrodynamic systems disposed along electron beam and isolated from each other by conducting disks with drift tubes. Each electrodynamic system is provided with energy input and output. Operating-range wavelength of electrodynamic system rises in direction of electron beam motion and ratio of electrodynamic system diameter to this wave reduces in same direction. Transit-time channel diameter remains constant or increases from system to system in direction of electron beam motion.
EFFECT: enhanced self-excitation resistance, reduced probability of current lowering, minimized size and mass.
1 cl, 1 dwg
The invention relates to techniques for ultra-high frequencies, and more specifically to the development of a powerful vacuum devices.
Known for powerful vacuum microwave devices operating in the same frequency range .
Currently being developed radar complexes, in which to detect the use of microwave radiation of the same range, and pointing the weapon at the target of another. Pointing the weapon requires great accuracy, so this is radiation with a wavelength smaller than the wavelength in the range of the detection target. Since there is no powerful microwave devices capable of operating in multiple frequency ranges, each range uses a separate device.
Create a single high-power microwave device that performs the functions of several devices, will simplify and cheapen the development and production of radar systems. Multiband devices, as dnovotny must be resistant to self, must have a minimum overall dimensions, small subsidence current electrodynamic system.
Thus, the objective of the invention is to create a device powerful vacuum device capable of operating in multiple frequency bands, resistant to excitation, with a minimum messagepart the diversified characteristics and low tomacedonia.
This problem is solved by the implementation of the system of interaction of the device sequentially disposed along the electron flow electrodynamic systems, each of which is separated from the other conductive disk with a drift tube, install on electrodynamic systems inputs and outputs of energy, the increase of the wavelength range of their work, the decrease of the ratio of the inner diameter to the wavelength, their span the channel or channels constant or increasing with the passage from one electrodynamic system to another in the direction of electron flow.
The proposed multiband vacuum microwave device shown in the drawing
The numbers mark:
I, II, ..., N the first, second, ..., N-I electrodynamic system of the device, forming its interaction system.
1 - electron gun,
2 - e flow
3 - lamp, focusing the electron flow,
4 is a collector of electrons,
5 - inputs of energy,
6 - conclusions energy electrodynamic systems,
7 - conductive disks
8 - the drift tube, insulating electrodynamic system from each other by electromagnetic energy.
The claimed device comprises an electronic gun 1 creating thread 2, focusing his magnets 3, a collector of electrons 4 located sequentially along e is astronomo flow 2 electrodynamic system I, II, ..., N, form a system of interaction devices, entries 5 and 6 conclusions energy electrodynamic systems, conductive disks 7 with drift tubes 8, the insulating electrodynamic system of electromagnetic energy.
Multiband microwave device works in the following way (see drawing). Created electron gun 1 single or multibeam thread 2 (shown single-beam flow) is focused by magnets 3 and passes through an electrodynamic system I, II, ..., N, settling on the collector 4. Gun 1 can be both single-and multi-beam, with a grid or with pin management, as well as one - or multi-mode.
When the electron beam 1 and the absence of signals at the inputs of power 5 system interaction device on the conclusions energy 6 no signal, because the electrodynamic system I, II, ..., N are isolated from other conductive disks 7 with drift tubes 8 and electrodynamic systems are designed so that they do not snowslides. In the direction of electron flow electrodynamic systems I, II, ..., N are arranged in order of increasing wavelength of their work. This must be done because of the nonlinear interaction of the electron stream and electromagnetic waves in flows arise spatial charge waves corresponding to the wavelength of the input signal electrodynam the political system and lower it into a multiple number of times. These waves through the drift tube 8 pass from one electrodynamic system to another, which is their interaction. However, this interaction has no effect on the stability of electrodynamic systems located farther from the electron gun 1 than reinforcing, as the subsequent interaction of electrodynamic systems with space-charge waves created by the previous one, occurs in the higher frequency bands the next, where the impedance of the interaction is negligible, while the terminals 5 and 6 conclusions energy resolutory.
Therefore, when the gain of the signal one electrodynamic system, following her electrodynamic systems that operate at longer wavelengths ranges remain stable.
To reduce the overall size of the device, reduce the cost and simplify manufacturing the electrodynamic system of the device must be approximately the same internal diameters. This can be achieved by increasing the wavelength operating range of the ratio of the inner diameter electrodynamic system to this wave decreases.
The diameter or diameters of the transit channel electrodynamic systems, adjacent to the electron gun 1, you should select the best possible, since it works in Korotkova the new range. The diameters of the transit channel (channels) subsequent electrodynamic systems can be made equal to the diameter of the passage channel of the previous electrodynamic system or higher, because each subsequent electrodynamic system works in a more far-ranging than the previous one. In the process of moving an electron beam in a focusing magnetic field in it growing instability due to the inhomogeneity of the field, which leads to an increase in tomacedonia. Reducing tomacedonia, in the case of the large length of the system interaction device, and is achieved by increasing the transit channel electrodynamic systems from the previous to the subsequent in the direction of electron flow.
To perform the claimed device can be used to slow the system type chain associated heat sinks [2, 3], type of counter pins , slow spiral system type , from which can be made multiple electrodynamic system. The most effective multiple electrodynamic system partition chains connected resonators described in .
The ratio of the inner diameter to the wavelength range of systems [2, 3] is 0.5-0.8, systems  - 0,12-0,30; and systems  about 0.1.
The interaction system tri-band device can be performed trail is accordingly:
first, adjacent to the electron gun, the electrodynamic system of the short wave range, such as mm, is made of chains of linked cavities;
second electrodynamic system, for example, the measuring range will be made of chains of counter pins;
- third, for example, ten of the range will be made on the basis of slowing down the system ring-shank or ring-bracket.
However, the implementation of electrodynamic systems is not limited slow-wave systems. Clear that can be used and the resonators, and the combination of slow-wave systems with resonators, i.e. klystrons and hybrid systems.
Also the focusing of electron flow may be implemented as a permanent magnetic field, and reverse and periodic. When using periodic magnetic field, when the electrodynamic system is partially combined with the focusing, the inner part of the disk that separates the electrodynamic system must be made of nonmagnetic metal, and the outer magnet.
The device is created multiband vacuum microwave-type instrument On resistant to the excitation, small tomacedonia, with minimum overall dimensions.
Use izopet the of will instead of multiple devices of different wavelengths to create one, perform all of their functions that will simplify and cheapen the development and production of multi-band radar systems.
1. Powerful vacuum microwave devices. Ed. Lslamist. World. Moscow. 1974.
2. EN 2189660, Kopylov CENTURIES, Pismenko SCI
3. EN 2211501, Kopylov CENTURIES, Pismenko SCI
4. Siharath, Accruement. Slow-wave system. Technique. Kiev, 1965, pg.107.
5. AS the USSR №344529, Pismenko SCI
Multiband vacuum microwave-type instrument On containing spaced along the axis of the electron gun, the electron-optical system, the interaction between an electron beam with electromagnetic energy and the collector of electrons, characterized in that the communication system is formed by sequentially located along the electron flow electrodynamic systems, separated from one another conductive disk with a drift tube, each electrodynamic system is supplied with the input and output of energy in the direction of electron flow electrodynamic systems are made with increasing wavelength of their working range, with respect to their internal diameter to the wavelength for each of the previous system exceeds this ratio for each further, while the diameter of the passage channel or channels are constant or increase from one who electrodynamically system to another.
FIELD: electronic engineering; sectionalized slow-wave structures built of two or more separate sections.
SUBSTANCE: each section of slow-wave structure is essentially set of pins 2 disposed within case 1 perpendicular to its axis and spaced apart through definite distance at angle 0°<α≤180° to one another. Mounted on each pin concentrically with respect to case is transit-time tube 3 in the form of hollow cylinder. Proposed mechanical design is characterized in that adjacent ends of sections mount disk-shaped isolating metal walls 4 with transit-time hole 5 for passing electron beam which are concentric to case, as well as microwave energy absorbers 6 in the form of hollow cylinder. Absorbers are joined through their butt-ends with opposite sides of isolating wall concentrically to transit-time hole by means of heat-conducting layer 7. Proposed design of this slow-wave structure ensures electrodynamic parameters required for microwave amplifiers and can be used in continuously running high-power traveling-wave tubes with continuous power output up to 2.5 kW. In the course of operation this structure affords high level of microwave energy attenuation at ends of adjacent sections (up to 18 dB) and low level of absorber microwave energy reflectivity (0.01 to 0.07) in frequency band up to 15%.
EFFECT: enhanced heat-dissipation ability, reduced mass and size.
3 cl, 1 dwg
FIELD: electronics; high-power electron-beam microwave devices.
SUBSTANCE: proposed beam-plasma microwave device designed to amplify and generate radio-frequency energy for highly informative noise-immune radio communications, radio navigation, and for other purposes in radio engineering, as well as for plasmochemical and ion-plasma technologies to modify surfaces of various materials has electron gun, differential evacuation system, electrodynamic system in the form of set of coupled resonators with axial transit-time channel, energy input and output units, and collector, all disposed in tandem along device axis, as well as hydrogen producer.
EFFECT: enhanced reliability and service life of device.
2 cl, 1 dwg
FIELD: microwave device design and technology.
SUBSTANCE: proposed traveling-wave tube is characterized in high specific heat load on helical slow-wave structure and in that its vacuum envelope is combined with magnetic circuit of periodic magnetic focusing structure. Insulating supports are joined with slow-wave structure helix by means of insulator solder whose melting point is over 1050 °C and with case assembled of magnetic-system pole shoes copper-soldered together, as well as with their separating bushings by means of metal solder whose melting point is 780 to 1000 °C. Nonmagnetic bushings separating pole shoes of periodic magnetic focusing structure are made of vacuum ceramics whose coefficient of linear thermal expansion is lower than that of pole-shoe and insulating-support materials. Expression for choosing thickness of nonmagnetic bushing is given in invention specification.
EFFECT: enhanced output power, mechanical strength, and reliability of traveling-wave tube.
15 cl, 4 dwg
FIELD: electronic engineering, in particular, traveling-wave tubes.
SUBSTANCE: the traveling-wave tube has an electron gun, inhibiting system of the coupled resonators type, electrostatic periodic focusing system made in the form of electrodes fastened on holders and placed in the cavities of the resonators, and a collector. A long-focus magnetic lens is installed between the inhibiting system and the collector. A vacuum envelope is provided around the inhibiting system, which has supporting rods and insulators, the supporting rods (1-3) are installed outside the resonators in parallel with the axis of the inhibiting system and electrically coupled to the cathode of the electron gun. The insulators are made in the form of bushes fastened on the outside walls of the resonators and rigidly connected to the supporting rods. The electrode holders are connected to the supporting rods and insulated with the id of a vacuum gap from the walls of the resonators.
EFFECT: produced a high-power traveling-wave tube for use in the output stages of transmitting devices.
2 cl, 4 dwg
FIELD: electronic engineering; slow-wave structures of traveling-wave tubes of primarily packaged design integrated with periodic magnetic focusing structure.
SUBSTANCE: proposed pin-type periodic slow-wave structure is packaged. Each pin carries transit-time tube in the form of cylinder that has through slit throughout its entire length. This slit is aligned with cylinder generating line of transit-time tube. Angle α of slit turn relative to pin axis in plane perpendicular to slow-wave structure axis ranges within arc sin(l/d) ≤ α < 180 deg., where l is pin width in plane perpendicular to slow-wave structure axis, m; d is outer diameter of transit-time tube, m. Slow-wave structure design ensures reduced diameter of resonator in operating frequency range thereby reducing its transverse dimensions.
EFFECT: provision for miniaturization of traveling-wave tube and devices built around it.
11 cl, 10 dwg
FIELD: microwave engineering; high-power broadband multibeam devices such as klystrons.
SUBSTANCE: proposed O-type device has two multibeam floating-drift tubes in each active resonator with operating wave mode H201, diameter D of each tube being chosen from condition D = (0.4 0.45)λ, where λ is wavelength corresponding to center frequency of device operating band. Input and output active resonators with floating-drift tubes asymmetrically disposed relative to opposite walls of these resonators are proposed for use. Input active resonator can be connected to energy input directly or through input waveguide, or through input passive resonator and input waveguide. Output active resonator can be connected to energy output through one output passive resonator and output waveguide or through two output passive resonators and input waveguide. Two multibeam floating-drift tubes are disposed in each active resonator including intermediate ones.
EFFECT: enhanced output power, efficiency, and practical feasibility, simplified design, facilitated manufacture, assembly, and adjustment of device.
11 cl, 4 dwg
FIELD: electromagnetic radiation sources including phased matrix ones.
SUBSTANCE: proposed electromagnetic radiation source has anode and cathode separated by anode and cathode space as well as electric contacts for applying DC voltage between anode and cathode. At least one magnet is used to build DC magnetic field in cathode-anode space actually perpendicular to electric field. There are many waveguides within anode which have anode-cathode space holes formed along anode surface and used to locate anode-cathode space with the result that cathode-emitted electrons actuated by electric and magnetic fields follow path in anode-cathode space in immediate proximity of holes. Common resonator receives electromagnetic radiation induced in holes due to passage of electrons in immediate proximity of holes and reflects electromagnetic radiation back to holes to create oscillating electric fields in each of holes at desired operating frequency.
EFFECT: improved design.
22 cl, 10 dwg