CN114823253B - External-hanging cold cathode amplifier based on rectangular waveguide - Google Patents
External-hanging cold cathode amplifier based on rectangular waveguide Download PDFInfo
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- CN114823253B CN114823253B CN202210401251.5A CN202210401251A CN114823253B CN 114823253 B CN114823253 B CN 114823253B CN 202210401251 A CN202210401251 A CN 202210401251A CN 114823253 B CN114823253 B CN 114823253B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/34—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
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Abstract
The invention belongs to the field of vacuum electronic devices in microwave, millimeter wave and terahertz wave bands, and particularly provides an externally hung cold cathode amplifier based on a rectangular waveguide, which is used for solving the problems of band expansion, power synthesis, signal amplification, interference resistance, integration and the like in the prior art. The invention comprises the following steps: rectangular waveguide 1, coupling transition 2, high-frequency external hanging device 3; the high-frequency external hanging device 3 is fixed on the narrow side surface of the rectangular waveguide 1 through the coupling structure 2; the injection wave separation is realized through the high-frequency external hanging device arranged on the rectangular waveguide, and the standing wave field generated in the high-frequency external hanging device is coupled and transmitted into the rectangular waveguide to be overlapped with an input signal, so that the signal amplification is realized; different voltages are applied to the cathodes of the plurality of high-frequency external hanging devices, so that expansion in the range of input signals can be realized, and the output power can be greatly improved by cascading a plurality of units; provides a vacuum device with excellent performance for the application in the fields of electronic countermeasure, space communication and the like.
Description
Technical Field
The invention belongs to microwave, millimeter wave and terahertz wave bands, relates to the field of vacuum electronic devices, and particularly provides a plug-in type cold cathode amplifier based on a rectangular waveguide, which realizes wave injection separation and can realize bandwidth expansion and power improvement through a single or a plurality of high-frequency plug-in devices or cascaded device units.
Background
The vacuum electronic device plays an extremely important role in national economy and national defense equipment, and is widely applied to the fields of radar, communication, medical imaging and the like. Since the end of the last century, the semiconductor industry and integrated circuit technology have evolved rapidly, vacuum electronics have gradually lost its dominant role in the field of considerable electronic information, and are undergoing the impact of solid state electronics development; however, the new semiconductor device is still not mature, and the currently developed solid-state power device still has great drawbacks and limitations in terms of energy efficiency, operating frequency, maximum output power and reliability. Therefore, vacuum electronic devices are still indispensable core devices in the advanced scientific and technical fields of aerospace, military equipment and the like, and are widely used and continuously updated and developed.
Along with the continuous development of microwave, millimeter wave and terahertz frequency band vacuum radiation sources in various fields, the requirements on output power and efficiency are continuously improved; under the limit requirements of high frequency, high power and wide frequency band, especially in the fields of military equipment, aerospace and the like, vacuum electronic devices are required to have the advantages of small volume, light weight, high power, long service life and the like. The field emission cold cathode has its inherent advantages compared to conventional heat emitting cathodes, such as: the field emission cold cathode has the advantages of low power consumption, capability of working in a greenhouse, high response speed, large current density, small size, high efficiency and the like, and is expected to become an emission source of a new generation of high-power radiation source devices.
However, the existing microwave, millimeter wave, terahertz and other wave band radiation source technologies still have a plurality of problems: 1) For a single-stage amplifier, power amplification and wider frequency bands can be realized, but the output power level of the current high-frequency-band amplifier needs to be improved, and the output bandwidth is narrow and fixed; 2) For a device, the electron beam interacts with the high-frequency field in the same channel and transmits, so that the signal energy is reflected greatly and a signal output window is easily damaged, and waste gas electrons are not collected; in addition, an electron optical system, a high-frequency structure, a collector and the like are required to be designed independently, so that the whole device is large in size and not easy to integrate; 3) Because the vacuum device works in a high-frequency band, the complex structure of wave injection interaction can cause the problems of high machining difficulty and low precision.
Disclosure of Invention
The invention aims to provide an externally hung cold cathode amplifier based on a rectangular waveguide, which can realize multi-cavity frequency modulation and axial cascading and can effectively solve the problems of frequency band expansion, power synthesis, signal amplification, interference resistance, integration and the like. According to the invention, the high-frequency external hanging device is arranged on the narrow side surface of the rectangular waveguide through the coupling structure, so that wave injection separation is realized, and a standing wave field generated in the high-frequency external hanging device is coupled and transmitted into the rectangular waveguide to be overlapped with an input signal, so that signal amplification is realized; different voltages are applied to the cathodes of the high-frequency external hanging devices on two sides, and expansion in the range of input signals can be realized according to the principle of the dispersion characteristic of the injection waves; the output power can be greatly improved by cascading a plurality of the units of the invention. In addition, the invention utilizes the advantages of cold cathode field emission electron flow, low power consumption and no influence of temperature, so that the injection interaction efficiency is improved; and the vacuum device has compact structure, is easy to integrate and process, and provides a vacuum device with excellent performance for the application in the fields of electronic countermeasure, space communication and the like.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a rectangular waveguide based externally hung cold cathode amplifier comprising: rectangular waveguide 1, coupling transition 2, high-frequency external hanging device 3; the high-frequency external hanging devices 3 are fixed on the side face of the rectangular waveguide 1 through the coupling structure 2 and are symmetrically distributed;
the high-frequency external hanging device 3 consists of a cathode 3-1, a cold cathode emitter 3-2, an insulating support plate 3-3, a high-frequency interaction partition plate 3-4, an electron channel hole 3-5 and an anode 3-6, wherein the anode 3-6 is of a rectangular box-shaped structure with an opening at the upper end, the insulating support plate 3-3 is of a rectangular annular structure matched with the anode 3-6, the insulating support plate 3-3 is fixed at the opening end of the anode 3-6, a limiting bulge is arranged on the inner side of the insulating support plate 3-3, the cathode 3-1 is clamped and fixed at the limiting bulge, and the anode 3-6, the insulating support plate 3-3 and the cathode 3-1 jointly form a high-frequency interaction space; the cold cathode emitter 3-2 adopts a square matrix structure (N multiplied by N) formed by a plurality of cylindrical emitter units, and the cold cathode emitter 3-2 is attached to the lower surface of the cathode 3-1 and is positioned in the middle position; a plurality of high-frequency interaction clapboards 3-4 with the same structure are arranged in parallel in the anode 3-6, the high-frequency interaction clapboards 3-4 are provided with electron channel holes 3-5, the electron channel holes 3-5 are arranged opposite to the cylindrical emitter units one by one, and the size of the electron channel holes is larger than or equal to that of the cylindrical emitter units; and the side wall of the anode 3-6 corresponding to the coupling structure 2 is provided with a coupling hole matched with the coupling structure.
Furthermore, the narrow side surface of the rectangular waveguide is correspondingly provided with a coupling hole matched with the coupling structure 2, two ends of the rectangular waveguide 1 are respectively provided with a flange 1-1 and a window 1-2, and the window, the rectangular waveguide 1, the coupling structure 2 and the high-frequency interaction space form a device sealing space.
Furthermore, the number of the high-frequency externally hung devices is M, and M is an even number of M more than or equal to 2.
Furthermore, the externally hung cold cathode amplifier based on the rectangular waveguide realizes multistage interconnection through the flange 1-1.
In terms of working principle:
the invention provides a rectangular waveguide-based externally hung cold cathode amplifier, which is characterized in that a basic mode signal (called a transmission signal) is input at an input port of a rectangular waveguide, part of energy enters a high-frequency externally hung device when the signal encounters a coupling hole with a narrow side according to the small hole diffraction theory of a directional coupler, and the rest energy continues to be transmitted to an output port, and the signal energy enters a symmetrical high-frequency externally hung device (wherein the symmetry refers to the central line of a long side of a rectangular section perpendicular to the propagation direction of the input signal, so that the problems of reflection of the input signal, increased design optimization difficulty and the like caused by an asymmetric structure or dislocation design are avoided) to excite TE 101 The cold cathode material adhered on the surface of the cathode generates electron beam under the action of strong field through field emission, because the whole high-frequency interaction baffle plate structure (an array type electron channel hole is arranged at the middle part according to the energy distribution of the electric field) has the periodic slow wave characteristic, the electron beam gives energy to electromagnetic wave signals, the signals further modulate the electron beam in turn to realize speed modulation and density modulation, the energy of the high-frequency field is gradually increased along with the enhancement of modulation depth, and finally the standing wave field generated in the high-frequency plug-in device (called asThe external signal) is retransmitted into a transmission channel of the rectangular waveguide through the coupling hole (waste electrons are beaten on the anode wall), the external signal and the transmission signal (the phase difference of the external signal and the transmission signal is kept synchronous) are overlapped, the amplification of the signal power is realized, and finally, the signal is output from the signal output port.
Furthermore, according to the working principle of the amplifier and the dispersion characteristic of the injection wave, two structures can be adopted on the basis of the above structure:
1. according to the working principle of the branch waveguide and the phase superposition principle of porous coupling, n coupling holes are symmetrically arranged on the side surfaces of two narrow sides, and high-frequency external hanging devices are respectively fixed, as shown in figure 3; by utilizing the principle of multi-hole coupling, a plurality of frequency points with ideal directivity can be met by changing the hole spacing and the hole size, so that the frequency band can be widened, and the distance between every two coupling holes on one side of the position parallel to an input transmission signal and the hole size need to be calculated according to theoretical simulation; the structure further comprises two embodiments:
1) The size of each high-frequency external hanging device (high-frequency interaction space) is the same, and the cathode of each high-frequency external hanging device is designed to be applied with different voltages (the anode is set to be zero potential); the cascade connection of n plug-in devices is provided, the 3dB bandwidth of the first stage is f 1 To f 2 The second-stage 3dB bandwidth is f 3 To f 4 By this, the 3dB bandwidth up to the nth stage is f 2n-1 To f 2n The n unit devices can realize the staggered superposition of n frequency bands, and the n frequency bands reach the frequency band f in the range of the pass band of the input signal 1 To f 2n Is added with gain;
2) Designing the cathode of each high-frequency external hanging device to apply the same voltage (the anode is set to be zero potential), and realizing phase speed resynchronization by adjusting the size of each group of high-frequency external hanging devices (two symmetrical high-frequency external hanging devices are one group), so as to achieve the purposes of expanding bandwidth and improving power;
2. the relay of the microwave signals is realized by the step-by-step connection of the flanges, and 2 coupling holes are symmetrically arranged on the side face of the narrow side in each stage of amplifier and respectively fix the high-frequency plug-in devices, as shown in figure 4; also has the two embodiments;
in the two structures, the first design makes the device structure more compact and integrated, and the second type can realize the matching of the output end load through the flange and increase the flexibility of adjustment.
In summary, the invention has the following beneficial effects:
the invention provides an externally hung cold cathode amplifier based on a rectangular waveguide, which can realize multi-cavity frequency modulation and axial cascading, and can effectively solve the problems of frequency band expansion and power amplification; the method specifically comprises the following advantages:
1) The rectangular waveguide is used as a transmission channel, and the rectangular waveguide is connected with the high-frequency jacket device through the coupling hole, so that separation of the electron beam and the signal field is realized (the emission direction of the electron beam is vertical to the transmission direction of the signal field, and the technology is different from the technology that the current electron beam and the high-frequency field perform wave injection interaction in the same parallel space), the improvement design of the anode of the high-frequency jacket device is facilitated, the multistage depressurization collection is realized, and the effective collection area and the optimal collection uniformity are met; in addition, the electron beam can be prevented from bombarding the output window sheet, a device system is effectively protected, and the working efficiency of the whole tube is improved;
2) The invention can greatly reduce the attenuation coefficient of the input signal, reduce the reflection loss (inhibit reflection oscillation) of the output signal to the input port, reduce the reflection of the standing wave field generated by the high-frequency plug-in device to the input port, improve the electron beam clustering effect, and greatly improve the output power, gain and transmission efficiency;
3) The structure of the high-frequency external hanging device works within a certain passband range, oscillation is easy to cause at two ends of the passband, sideband oscillation of the whole tube can be effectively restrained by utilizing the coupling hole (namely, the working bandwidth of input and output is required to be larger than the effective bandwidth of the high-frequency external hanging device), disturbance of an input signal to an electron beam can be reduced, and microwave leakage is prevented;
4) The design of the high-frequency plug-in device enables the whole device to be more compact, reduces the longitudinal size and is easier to process and integrate;
5) The cold cathode emitter reduces unnecessary heating devices through field emission, simplifies the cathode structure, and has the advantages of high starting speed, small radiation and low power consumption.
Drawings
FIG. 1 is a schematic diagram of a rectangular waveguide-based plug-in cold cathode amplifier according to the present invention;
FIG. 2 is a graph of the field energy distribution of the waveguide cell of FIG. 1;
FIG. 3 is a schematic diagram of a rectangular waveguide-based multi-cavity multi-frequency external-hanging cold cathode amplifier of the improved design of FIG. 1;
FIG. 4 is a schematic illustration of the step-by-step connection of the individual units of FIG. 1 by flanges;
wherein 1 is rectangular waveguide, 1-1 is flange, 1-2 is window, 2 is coupling hole, 3 is high frequency external hanging device, 3-1 is cathode, 3-2 is cold cathode emitter, 3-3 is insulating support plate, 3-4 is interaction baffle, 3-5 is electron channel hole, 3-6 is anode.
Detailed Description
In order to make the objects, technical schemes and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment provides a plug-in cold cathode amplifier based on a rectangular waveguide, and the structure of the plug-in cold cathode amplifier is shown in figure 1; the method specifically comprises the following steps: rectangular waveguide 1, coupling transition 2, high-frequency external hanging device 3; the high-frequency external hanging device 3 is fixed on the narrow side surface of the rectangular waveguide 1 through the coupling structure 2;
the high-frequency external hanging device 3 consists of a cathode 3-1, a cold cathode emitter 3-2, an insulating support plate 3-3, a high-frequency interaction partition plate 3-4, an electron channel hole 3-5 and an anode 3-6, wherein the anode 3-6 is of a rectangular box-shaped structure with an opening at the upper end, the insulating support plate 3-3 is of a rectangular annular structure matched with the anode 3-6, the insulating support plate 3-3 is fixed at the opening end of the anode 3-6, a limiting bulge is arranged on the inner side of the insulating support plate 3-3, the cathode 3-1 is clamped and fixed at the limiting bulge, and the anode 3-6, the insulating support plate 3-3 and the cathode 3-1 jointly form a high-frequency interaction space; the cold cathode emitter 3-2 adopts a square matrix structure (N multiplied by N) formed by a plurality of cylindrical emitter units, and the cold cathode emitter 3-2 is attached to the lower surface of the cathode 3-1 and is positioned in the middle position; a plurality of high-frequency interaction clapboards 3-4 with the same structure are arranged in parallel in the anode 3-6, and the high-frequency interaction clapboards 3-4 are provided with electron channel holes 3-5, wherein the electron channel holes 3-5 are opposite to the cylindrical emitter units one by one and have the same size; the side wall of the anode 3-6 corresponding to the coupling structure 2 is provided with a coupling hole matched with the coupling structure 2;
coupling holes matched with the coupling structure 2 are correspondingly formed in the side face of the narrow side of the rectangular waveguide, and flanges 1-1 and window sheets 1-2 are respectively arranged at two ends of the rectangular waveguide 1.
More specifically:
in the embodiment, two high-frequency external hanging devices 3 are adopted and symmetrically arranged on two narrow side surfaces of the rectangular waveguide 1; the specific rectangular waveguide 1 is made of metal copper, the inner wall size is 7.32mm multiplied by 4.15mm, the outer wall size is 8.42mm multiplied by 4.83mm, and the length is 32.12mm; coupling holes (rectangular holes with the length of 4.15mm multiplied by 3.7 mm) are symmetrically formed at the positions 8.74mm away from the input port on the side surfaces of the two narrow sides, and the high-frequency external hanging device 3 is fixedly arranged on the rectangular waveguide 1 at the positions of the coupling holes through the coupling structure 2; flanges 1-1 are arranged at two ends: the material is metallic copper, square ring with the size of 11.19mm multiplied by 7.72mm multiplied by 0.88mm, and is provided with screw holes, and the window sheet 1-2: the material is alumina ceramic;
the coupling structure 2 is made of metal copper, the inner wall size is 4.15mm multiplied by 3.7mm, the outer wall size is 4.92mm multiplied by 4.83mm, and the height is 0.2mm; it should be noted that: the coupling structure is only used for realizing the exchange of the mode energy of the input signal and the mode energy of the high-frequency plug-in device, so that the matching design is highly correspondingly carried out;
the high-frequency external hanging device 3 consists of a cathode 3-1, a cold cathode emitter 3-2, an insulating support plate 3-3, a high-frequency interaction partition plate 3-4, an electron channel hole 3-5 and an anode 3-6; the cathode 3-1 is made of nonmagnetic stainless steel and is formed by stacking a large rectangular plate, a small rectangular plate and a small rectangular plate with different thicknesses along the center, and is used for realizing that the cathode is clamped and fixed on a limiting protrusion arranged on the inner side of the insulating supporting plate 3-3, wherein the long side of the rectangular plate (large) positioned above is 8.63mm, the wide side is 8.15mm, the thickness is 0.7mm, and the long side of the rectangular plate (small) positioned below is 6.44mm, the wide side is 5.98mm, and the thickness is 0.35mm;
the cold cathode emitter 3-2 is made of carbon nano tube or graphene, the diameter of a small cylindrical emitter unit in a 3X 3 array is 0.72mm, the height is 0.15mm, and the distance between circle centers is 1.18mm;
the insulating support plate 3-3 is made of 99 # The ceramic is used for realizing the connection and fixation of the cathode 3-1 and the anode 3-6, and the cathode 3-1 is at a relatively low potential, the anode 3-6 is at a relatively high potential, the arc phenomenon can be effectively restrained by the design of the inner side limiting bulge, a good insulating effect is achieved, and the insulating support plate can be formed by stacking two rectangular rings, wherein the size of the inner rectangular ring (bulge): height 0.7mm, inner rectangle 6.44mm (length) x 5.98mm (width), outer rectangle 7.27mm x 6.82mm, size of outer rectangular ring: the height is 1.53mm, the inner rectangle specification is 7.27mm multiplied by 6.82mm, and the outer rectangle specification is 8.63mm multiplied by 8.15mm;
the high-frequency interaction separator 3-4 is made of metal copper, is conveniently fixed on the inner wall of the anode, adopts a concave structure with high two sides, and is realized by arranging a groove in a rectangular body, wherein the size of the rectangular body is 7.27mm (length) multiplied by 6.82mm (width) multiplied by 0.62mm (height), and the size of the groove is 6.82mm multiplied by 6.44mm multiplied by 0.35mm; the electron channel holes 3-5 are in one-to-one correspondence with the sizes and the positions of the cold cathode emitters 3-2;
the anode 3-6 is made of nonmagnetic stainless steel, the peripheral dimension of the anode is 8.63mm multiplied by 8.13mm multiplied by 5.18mm square body, and the coupling hole matched with the coupling structure is a rectangular hole of 4.15mm multiplied by 3.7 mm;
the whole device can assist in cooling modes of air cooling, water cooling and other common microwave pipes, and can well achieve the cooling effect, so that the normal operation of the whole device system is ensured; a guiding magnetic field is arranged in the transmission direction of the electron beam, and the modes of an outer-covered coil, a permanent magnet, a periodic permanent magnet and the like can be adopted;
all parts of the high-frequency interaction system are welded into a whole by utilizing a microwave electric vacuum device process, and vacuum exhaust is carried out, so that an absolute vacuum environment is formed inside the whole device; in operation, the cathode substrate is connected to a negative voltage and the anode substrate is connected to ground.
In addition, the narrow side surface of the rectangular waveguide means: along the side of the rectangular cross section perpendicular to the electromagnetic wave transmission direction where the broad side (narrow side) is located.
The working process of the external hanging type cold cathode amplifier based on the rectangular waveguide in the embodiment is as follows: inputting a fundamental mode signal (called a transmission signal) at an input port of a rectangular waveguide 1, and when the signal meets a narrow-side coupling hole 2 according to the small hole diffraction theory of a directional coupler, part of energy simultaneously enters a high-frequency plug-in device 3 with central symmetry, the rest energy continues to be transmitted to an output port, and the signal energy enters the high-frequency plug-in device to excite TE 101 In the mode, as shown in fig. 2, the cathode 3-1 is connected with negative voltage, the anode 3-6 is grounded, the cold cathode material adhered on the surface of the cathode generates electron beam under the action of strong field through field emission, (a constant guiding magnetic field is arranged in the motion direction of the electron beam at the same time to ensure the stable and uniform transmission of the electron beam), because the whole high-frequency interaction baffle structure (an array electron channel hole is arranged at the middle part according to the electric field energy distribution diagram) has periodic slow wave characteristic (the boundary condition discontinuity of the high-frequency interaction structure), the electron beam gives energy to electromagnetic wave signals, the signals are further modulated to the electron beam in turn, the speed modulation and the density modulation are realized, the energy of the high-frequency field is gradually increased along with the enhancement of the modulation depth, finally, the standing wave field (called as the external signal) generated in the high-frequency external device is transmitted into the transmission channel of the rectangular waveguide through the coupling hole (the waste electrons are beaten on the anode wall), the external signal and the phase difference between the external signal and the external signal is kept synchronous), and the amplification of the signal power is realized, and finally the output from the signal port is realized.
In summary, the embodiment realizes the injection wave separation by symmetrically connecting the coupling hole with the narrow side of the rectangular waveguide to the high-frequency plug-in device, and the standing wave field generated in the high-frequency plug-in device is coupled and transmitted into the rectangular waveguide to be overlapped with the input signal, thereby realizing the signal amplification; different voltages are applied to the cathodes of the high-frequency external hanging devices on two sides, and expansion in the range of input signals can be realized according to the principle of the dispersion characteristic of the injection waves; the device is used as a unit structure, and a plurality of units are cascaded, so that the output power can be greatly improved.
While the invention has been described in terms of specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the equivalent or similar purpose, unless expressly stated otherwise; all of the features disclosed, or all of the steps in a method or process, except for mutually exclusive features and/or steps, may be combined in any manner.
Claims (3)
1. A rectangular waveguide based externally hung cold cathode amplifier comprising: a rectangular waveguide (1), a coupling structure (2) and a high-frequency external hanging device (3); the high-frequency external hanging devices are fixed on the narrow side surface of the rectangular waveguide through the coupling structure and are symmetrically distributed;
the high-frequency external hanging device (3) is composed of a cathode (3-1), a cold cathode emitter (3-2), an insulating support plate (3-3), a high-frequency interaction baffle (3-4), an electronic channel hole (3-5) and an anode (3-6), wherein the anode (3-6) is of a rectangular box-shaped structure with an opening at the upper end, the insulating support plate (3-3) is of a rectangular annular structure matched with the anode (3-6), the insulating support plate (3-3) is fixed at the opening end of the anode (3-6), a limiting bulge is arranged on the inner side of the insulating support plate (3-3), the cathode (3-1) is clamped and fixed at the limiting bulge, and the anode (3-6), the insulating support plate (3-3) and the cathode (3-1) jointly form a high-frequency interaction space; the cold cathode emitter (3-2) adopts a square matrix structure (N multiplied by N) formed by a plurality of cylindrical emitter units, and the cold cathode emitter (3-2) is attached to the lower surface of the cathode (3-1) and is positioned in the middle position; a plurality of high-frequency interaction clapboards (3-4) with the same structure are arranged in parallel in the anode (3-6), the high-frequency interaction clapboards (3-4) are provided with electron channel holes (3-5), the electron channel holes (3-5) are arranged opposite to the cylindrical emitter units one by one, and the size of the electron channel holes is larger than or equal to that of the cylindrical emitter units; coupling holes matched with the coupling structures are formed in the side walls of the anodes (3-6) corresponding to the coupling structures (2);
coupling holes matched with the coupling structures (2) are correspondingly formed in the narrow side surfaces of the rectangular waveguides, flanges (1-1) and window sheets (1-2) are respectively arranged at two ends of the rectangular waveguides, and the window sheets, the rectangular waveguides, the coupling structures and the high-frequency interaction space form a device sealing space.
2. The rectangular waveguide-based plug-in cold cathode amplifier according to claim 1, wherein the number of the high-frequency plug-in devices is M, and M is an even number of M.gtoreq.2.
3. The external-hanging cold cathode amplifier based on the rectangular waveguide according to claim 1, wherein the external-hanging cold cathode amplifier based on the rectangular waveguide realizes multistage interconnection through a flange (1-1).
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| WO1989004051A1 (en) * | 1987-10-29 | 1989-05-05 | Farney George K | Microwave tube with directional coupling of an input locking signal |
| US5668442A (en) * | 1994-05-13 | 1997-09-16 | Hughes Electronics | Plasma-assisted tube with helical slow-wave structure |
| JP2913036B1 (en) * | 1998-07-06 | 1999-06-28 | 防衛庁技術研究本部長 | Traveling wave tube |
| CN102737929A (en) * | 2011-04-01 | 2012-10-17 | 中国科学院电子学研究所 | Filter loading broadband three-gap coupling output cavity structure |
| CN103824738A (en) * | 2014-03-19 | 2014-05-28 | 中国科学院电子学研究所 | Klystron output resonant cavity |
| CN107768216A (en) * | 2017-10-19 | 2018-03-06 | 电子科技大学 | A kind of high efficiency cascades backward wave oscillator |
| CN109872935A (en) * | 2019-02-15 | 2019-06-11 | 电子科技大学 | A kind of more note higher mode array high frequency interacting systems based on cold cathode |
| CN113035672A (en) * | 2021-03-05 | 2021-06-25 | 电子科技大学 | Double-electron-beam expansion interaction circuit based on gap high-order mode |
| CN114023617A (en) * | 2021-11-02 | 2022-02-08 | 电子科技大学 | Annular multi-electron-beam radiation source based on cold cathode |
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