阅读说明：本技术 一种l波段三腔高功率微波器件 (L-band three-cavity high-power microwave device ) 是由 丁恩燕 张运俭 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种L波段三腔高功率微波器件,包括圆波导套筒及与圆波导套筒同轴的内导体；圆波导套筒内一端设置与圆波导套筒同轴的阴极,阴极的开口为环形,阴极的内直径为60mm,外直径为69mm；圆波导套筒沿电子束传输方向依次设置同内直径的反射腔、谐振腔和提取腔,反射腔、谐振腔和提取腔为设置在圆波导套筒上的环形槽；微波器件轴向长度为130mm,最大直径为150mm,内导体直径为40mm；在400KV电压下阴极发射束流强度为7.0kA,内直径60mm,外直径69mm的环形电子束,环形电子束在0.4T的轴向磁场引导下在微波器件内传输,一个脉冲时间内辐射产生频率为1.92GHz的L波段高功率微波。采用本发明的一种L波段三腔高功率微波器件,具有小型化,重量轻,易调节的优点。(The invention discloses an L-band three-cavity high-power microwave device, which comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve; a cathode coaxial with the circular waveguide sleeve is arranged at one end in the circular waveguide sleeve, the opening of the cathode is annular, the inner diameter of the cathode is 60mm, and the outer diameter of the cathode is 69 mm; the circular waveguide sleeve is sequentially provided with a reflection cavity, a resonant cavity and an extraction cavity which have the same inner diameter along the transmission direction of the electron beam, and the reflection cavity, the resonant cavity and the extraction cavity are annular grooves arranged on the circular waveguide sleeve; the axial length of the microwave device is 130mm, the maximum diameter is 150mm, and the diameter of the inner conductor is 40 mm; under the voltage of 400KV, the cathode emits an annular electron beam with the beam intensity of 7.0kA, the inner diameter of 60mm and the outer diameter of 69mm, the annular electron beam is transmitted in a microwave device under the guidance of a 0.4T axial magnetic field, and L-waveband high-power microwaves with the frequency of 1.92GHz are generated by radiation within one pulse time. The L-band three-cavity high-power microwave device has the advantages of miniaturization, light weight and easiness in adjustment.)

1. An L-band three-cavity high-power microwave device is characterized in that: comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve;

a cathode coaxial with the circular waveguide sleeve is arranged at one end in the circular waveguide sleeve, the opening of the cathode is annular, the inner diameter of the cathode is 60mm, and the outer diameter of the cathode is 69 mm;

the circular waveguide sleeve is sequentially provided with a reflection cavity, a resonant cavity and an extraction cavity which have the same inner diameter along the transmission direction of the electron beam, and the reflection cavity, the resonant cavity and the extraction cavity are annular grooves formed in the circular waveguide sleeve;

the axial length of the microwave device is 130mm, the maximum diameter of the microwave device is 150mm, and the diameter of the inner conductor is 40 mm;

under the voltage of 400KV, the cathode emits an annular electron beam with the beam intensity of 7.0kA, the inner diameter of 60mm and the outer diameter of 69mm, the annular electron beam is transmitted in a microwave device under the guidance of a 0.4T axial magnetic field, and L-waveband high-power microwaves with the frequency of 1.92GHz are generated by radiation within one pulse time.

2. The L-band three-cavity high power microwave device of claim 1, wherein: the reflection cavity, the resonant cavity and the extraction cavity are annular grooves which are coaxial with the circular waveguide sleeve and have rectangular sections.

3. The L-band three-cavity high power microwave device of claim 1, wherein: the outer diameter of the reflecting cavity is 150mm, the inner diameter of the reflecting cavity is 88mm, and the axial length of the reflecting cavity is 30 mm; the outer diameter of the resonant cavity is 130mm, the inner diameter is 88mm, and the axial length is 30 mm; the extraction chamber has an outer diameter of 150mm, an inner diameter of 88mm and an axial length of 30 mm.

4. The L-band three-cavity high power microwave device of claim 1, wherein: the axial distance between the reflecting cavity and the resonant cavity is 10 mm; the axial distance between the resonant cavity and the extraction cavity is 30 mm.

Technical Field

The invention relates to an L-band three-cavity high-power microwave device, and belongs to the technical field of high-power microwave devices.

Background

The high-power microwave generally refers to electromagnetic waves with peak power of more than 100MW and working frequency of 1-300 GHz. With the development of high-power microwave research, higher and higher requirements are put on the overall system efficiency of a high-power microwave source.

The axial O-shaped high-power microwave device is a high-power microwave device with wider application due to the easy guidance of electron beams and the changeable combination of the structure. At present, a longer slow wave structure is generally needed for the radiation generation of an axial O-shaped high-power microwave device to achieve the synchronization of the phase velocity of an electron beam and the microwave. In the existing high-power microwave source, the high-impedance device has high beam conversion efficiency, but generally needs a strong guiding magnetic field, and particularly needs a bulky and high-energy-consumption solenoid magnet system when the microwave source operates in a repeated frequency state. If the axial size of the device is shortened as much as possible, the volume and the weight of the magnet system can be reduced by several times, and the energy requirement of a magnetic field on a power supply can be greatly reduced. Therefore, how to design a compact high-power microwave source is one of the pursued targets.

Disclosure of Invention

The invention aims to: aiming at the problems, the invention provides an L-band three-cavity high-power microwave device which has the advantages of miniaturization, light weight and easy adjustment.

The technical scheme adopted by the invention is as follows:

an L-band three-cavity high-power microwave device comprises a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve;

a cathode coaxial with the circular waveguide sleeve is arranged at one end in the circular waveguide sleeve, the opening of the cathode is annular, the inner diameter of the cathode is 60mm, and the outer diameter of the cathode is 69 mm;

the circular waveguide sleeve is sequentially provided with a reflection cavity, a resonant cavity and an extraction cavity which have the same inner diameter along the transmission direction of the electron beam, and the reflection cavity, the resonant cavity and the extraction cavity are annular grooves formed in the circular waveguide sleeve;

the axial length of the microwave device is 130mm, the maximum diameter of the microwave device is 150mm, and the diameter of the inner conductor is 40 mm;

under the voltage of 400KV, the cathode emits an annular electron beam with the beam intensity of 7.0kA, the inner diameter of 60mm and the outer diameter of 69mm, the annular electron beam is transmitted in a microwave device under the guidance of a 0.4T axial magnetic field, and L-waveband high-power microwaves with the frequency of 1.92GHz are generated by radiation within one pulse time.

In the scheme, two ends of a circular waveguide sleeve are closed, the interior of the circular waveguide sleeve is vacuumized to millipascal level, an inner conductor is connected with the other end, opposite to a cathode, of the circular waveguide sleeve, and annular electron beams are transmitted in a microwave device; the reflection cavity can intercept the reverse energy in the transmission process of the electron beam, so that the energy of the electron beam entering the beam-wave conversion area is improved; the resonant cavity can lead the electron beam and the microwave with the same phase to generate energy conversion at the position; the extraction chamber is capable of separating microwaves from the electron beam.

Preferably, the reflection cavity, the resonant cavity and the extraction cavity are annular grooves which are coaxial with the circular waveguide sleeve and have rectangular sections.

Preferably, the reflection cavity has an outer diameter of 150mm, an inner diameter of 88mm, and an axial length of 30 mm; the outer diameter of the resonant cavity is 130mm, the inner diameter is 88mm, and the axial length is 30 mm; the extraction chamber has an outer diameter of 150mm, an inner diameter of 88mm and an axial length of 30 mm.

Preferably, the axial distance between the reflecting cavity and the resonant cavity is 10 mm; the axial distance between the resonant cavity and the extraction cavity is 30 mm.

Preferably, the maximum diameter of the microwave device coincides with the maximum outer diameter of the reflective cavity, the resonant cavity and the extraction cavity.

In the scheme, the outer diameters of the reflection cavity, the resonant cavity and the extraction cavity refer to the diameter of the bottom circle of the cavity; the inner diameters of the reflection cavity, the resonant cavity and the extraction cavity refer to the diameter of a circle at the opening of the cavity.

According to the L-band three-cavity high-power microwave device, an axially compact slow wave structure is adopted to generate L-band high-power microwaves, the L-band high-power microwave device is simple in structure, and the axial size and the radial size are very compact; the size and the weight of a high-power microwave source system can be greatly reduced, and the energy requirement of a magnetic field on a power supply can be greatly reduced; is a miniaturized L-band high-power microwave device.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the structure is simple, the size is compact, and the device has the advantages of miniaturization, light weight and easy adjustment; the size and the weight of a high-power microwave source system can be greatly reduced, and the energy requirement of a magnetic field on a power supply can be greatly reduced.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic sectional structure diagram of an L-band three-cavity high-power microwave device.

The labels in the figure are: 1-reflection cavity, 2-resonant cavity, 3-extraction cavity, 4-outer sleeve, 5-inner conductor, 6-cathode and 7-annular electron beam.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

As shown in fig. 1, the L-band three-cavity high-power microwave device of this embodiment includes a circular waveguide sleeve and an inner conductor coaxial with the circular waveguide sleeve, both ends of the circular waveguide sleeve are closed, the inside is evacuated to a millipascal level, a cathode coaxial with the circular waveguide sleeve is disposed at one end of the inside of the circular waveguide sleeve, an opening of the cathode is annular, an inner diameter of the cathode is 60mm, and an outer diameter of the cathode is 69 mm; the inner conductor is connected with the other end of the circular waveguide sleeve opposite to the cathode; the microwave device has a maximum diameter of 151mm and an inner conductor diameter of 40 mm.

The circular waveguide sleeve is sequentially provided with a reflecting cavity, a resonant cavity and an extracting cavity which are coaxial with the circular waveguide sleeve along the transmission direction of the electron beam, and the reflecting cavity, the resonant cavity and the extracting cavity are annular grooves with rectangular sections and arranged on the circular waveguide sleeve; the outer diameter of the reflecting cavity is 150mm, the inner diameter is 88mm, and the axial length is 30 mm; the outer diameter of the resonant cavity is 130mm, the inner diameter is 88mm, and the axial length is 30 mm; the external diameter of the extraction cavity is 150mm, the internal diameter is 88mm, and the axial length is 30 mm; the axial distance between the reflecting cavity and the resonant cavity is 10mm, and the axial distance between the resonant cavity and the extracting cavity is 30 mm.

The voltage of 400kV is applied between the cathode and the anode, the cathode emits annular electron beams with the inner diameter of 60mm, the outer diameter of 69mm and the beam intensity of 7.0kA, the annular electron beams are transmitted in a microwave device under the guidance of a 0.4T axial magnetic field, the energy of the annular electron beams is transferred to a microwave field, and L-band high-power microwaves with the frequency of 1.92GHz are generated within the time of one voltage pulse.

In conclusion, the L-band three-cavity high-power microwave device has the advantages of simple structure, compact size, miniaturization, light weight and easiness in adjustment; the size and the weight of a high-power microwave source system can be greatly reduced, and the energy requirement of a magnetic field on a power supply can be greatly reduced.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.