CN104124125A - Induction output tube with double-gap input cavity - Google Patents
Induction output tube with double-gap input cavity Download PDFInfo
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- CN104124125A CN104124125A CN201410350663.6A CN201410350663A CN104124125A CN 104124125 A CN104124125 A CN 104124125A CN 201410350663 A CN201410350663 A CN 201410350663A CN 104124125 A CN104124125 A CN 104124125A
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Abstract
The invention provides an induction output tube with a double-gap input cavity. The induction output tube comprises an input system, an output cavity and a collecting electrode, wherein the input system is provided with a double-gap input cavity and is used for utilizing microwaves input by the outside to perform density modulation on electron beams; the output cavity is fixedly connected to the rear end of the input system, the electron beams after the density modulation perform energy exchange in the output cavity, generated high-frequency energy is output to the outside; and the collecting electrode is fixedly connected to the rear end of the output cavity and used for collecting remaining electrons after energy exchange. Due to the fact that the induction output tube is provided with two input gaps, modulation can be performed on the electron beams twice, the modulation depth is increased, and power, gain and bandwidth of the induction output tube are improved.
Description
Technical field
The present invention relates to electric vacuum technology field, relate in particular to a kind of inductive output tube with double gap input cavity.
Background technology
In the television transmitter family of UHF wave band, except ceramic tube ripe and that use the earliest, the klystron of updating to raise the efficiency, and outside the high reliability all solid-state transmitter being becoming better and approaching perfection day by day, within 1993, there is again in the world employing inductive output tube television transmitter.Caused the great attention of radio and television industrial quarters, compared with television transmitter in the past, the outstanding feature such as inductive output tube television transmitter has price and maintenance cost is low, efficiency height, has caused people's extensive attention.
Induction output cavity IOT (Inductive Output Tube), also claim velocity modulation tetrode (klystrode), a kind of density modulation microwave tube that it mutually combines microwave three, tetrode and klystron to form is a kind of compact low-frequency high-power microwave amplifier part.In induction output cavity, input resonator produces high-frequency electric field between grid and negative electrode, controls the electron emission of hot cathode, obtains the electron beam of density modulation.Density modulation electron beam, through being added in after the high pressure acceleration between grid and anode head, enters output cavity through after one section of drift space, and induce high frequency voltage on export resonance cavity gap; Density modulation electron beam and output cavity high frequency voltage interact and obtain High frequency amplification, and the high frequency power of amplification is through the output of output transmission line.Compare with klystron, induction output cavity has that volume is little, lightweight, efficiency advantages of higher, is particularly suitable for low-frequency range application.Compare with microwave three, tetrode, induction output cavity can be operated in higher frequency, larger power and have higher gain.
Yet in the last few years, digital TV transmitter, particle accelerator, radar and the application such as communicate by letter had proposed new requirement-high-frequency, wide gain to induction output cavity, and traditional induction output cavity can not meet such needs.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides a kind of high-gain and the wide band inductive output tube with double gap input cavity.
(2) technical scheme
According to an aspect of the present invention, provide a kind of inductive output tube with double gap input cavity.This inductive output tube comprises: input system, has a double gap input cavity, for utilizing the microwave of extraneous input to carry out density modulation to electron beam; Output cavity, is connected and fixed on the rear end of input system, and the electron beam after density modulation carries out energy exchange in this output cavity, and the high-frequency energy of generation is exported to the external world; And collector, be connected and fixed on described output cavity rear end, for the excess electron after harvest energy exchange.
(3) beneficial effect
From technique scheme, can find out, the inductive output tube that the present invention has double gap input cavity has following beneficial effect:
(1) common inductive output tube only has an input gap, can only carry out primary modulation to electron beam, modulation depth is more shallow, and the present invention has an input gap between negative electrode and grid, between grid and input cavity outlet, there is again an input gap, owing to thering are two input gaps, thereby can carry out twice modulation to electron beam, modulation depth is deepened, thereby has increased power, gain and the bandwidth of inductive output tube;
(2) input cavity has adopted cylinder reentry type Hughes structure, on public arm, opens meniscate coupling slot, and it is simple for structure, and handling ease, cost are low.
Accompanying drawing explanation
Fig. 1 is the structural representation that the embodiment of the present invention has the inductive output tube of double gap input cavity;
Fig. 2 is the structural representation of embodiment of the present invention double gap input cavity;
Fig. 3 is the profile of the public arm of embodiment of the present invention double gap input cavity.
[main element symbol description of the present invention]
100-input system;
110-grided electron gun;
111-housing; 112-negative electrode;
113-heater; 114-grid;
115-anode head; 116-the first gap;
117-the second gap;
120-input cavity shell;
130-double gap input cavity;
131-the first input cavity; ; 132-the second input cavity;
The public arm of 140-;
141-coupling slot;
200-output cavity;
210-electron gun insulating ceramics;
300-collector;
310-collector insulating ceramics;
The coaxial input cable of 400-;
The coaxial output cable of 500-.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or specification description, similar or identical part is all used identical figure number.The implementation that does not illustrate in accompanying drawing or describe is form known to a person of ordinary skill in the art in affiliated technical field.In addition, although the demonstration of the parameter that comprises particular value can be provided herein, should be appreciated that, parameter is without definitely equaling corresponding value, but can in acceptable error margin or design constraint, be similar to corresponding value.The direction term of mentioning in embodiment, such as " on ", D score, 'fornt', 'back', " left side ", " right side " etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is to be not used for limiting the scope of the invention for explanation.
In the present invention, have in the inductive output tube of double gap input cavity, note at output cavity-Bo of electron beam mutual effect from the input system of density modulation, the DC energy of electron beam is changed into high-frequency microwave energy, thereby realized the amplification of microwave signal, it can realize high-power, broadband and high-gain in low-frequency range.
In one exemplary embodiment of the present invention, provide a kind of inductive output tube with double gap input cavity.Fig. 1 is the structural representation that the embodiment of the present invention has the inductive output tube of double gap input cavity.As shown in Figure 1, the inductive output tube that the present embodiment has double gap input cavity comprises: input system 100, has a double gap input cavity 130, for utilizing the microwave of extraneous input to carry out density modulation to electron beam; Output cavity 200, by electron gun insulating ceramics 210 and input system 100, be connected and fixed, the horn opening of its front end is aimed at the horn opening of the rear end of double gap input cavity 130, and the electron beam after density modulation, at this output cavity 200, energy exchange occurs, and the high-frequency energy of generation is exported to the external world; Collector 300, is hollow cavity structure, by collector insulating ceramics 310 and output cavity 200, is connected and fixed, and the horn opening of its front end is aimed at the horn opening of output cavity 200 rear ends, for the excess electron after harvest energy exchange.
In the present embodiment, the structure of each part with the inductive output tube of double gap input cavity is got rid of the process implementations such as gas by electrical property design, engineering design, precision optical machinery processing, soldering and baking.Below each part that respectively this is had to the inductive output tube of double gap input cavity is described in detail.
Please refer to Fig. 2, input system 100 comprises: grided electron gun 110, for electronics is provided; Input cavity shell 120, is cylindric, is sheathed on the periphery of grided electron gun 110, and with its sealing and be electrically insulated.Wherein, the outside of grided electron gun 110, the inner side of input cavity shell 120 forms double gap input cavity 130.In the present embodiment, this double gap input cavity 130 is cylinder reentry type Extended interaction oscillator.
Wherein, grided electron gun 110 comprises: housing 111, is cylindric; Negative electrode 112, curved structure, is fixed on housing 111 open rearward end places, and recessed towards housing inner side; Heater 113, is arranged in housing 111 inner side of negative electrode 112; Grid 114, is network structure, is arranged at outside housing 111, and the outside of negative electrode 112, it keeps sphere parallel with negative electrode 112, and this grid is connected to the inner side of input cavity shell 120 by the circular public arm 140 of radial outer periphery; Anode head 115, is fixed on the radial outer periphery of output cavity front end horn opening.Wherein, between anode head 115 and grid 114, by 210 insulation of electron gun insulating ceramics, be added with high pressure between the two.
Between grid 114 and negative electrode 112, form the first gap 116, between grid 114 and the rear end horn opening of double gap input cavity 130, form the second gap 117.
In the present embodiment, the surface of emission of negative electrode 112 is sphere, and electron emission is provided.Heater 113 is to be formed by well behaved resistance wire coiling, and object is to negative electrode 112 heating.Grid 114 is to consist of aperture plate, and this aperture plate and negative electrode 112 keeps strict sphere parallel, and after guaranteeing that grid focuses on, electron beam can advance from aperture plate hole is expedite, can not intercepted and not captured by aperture plate.
Fig. 2 is the schematic diagram shown in Fig. 1 with double gap input cavity in the inductive output tube of double gap input cavity.Please refer to Fig. 2, grid 114 and public arm 140 are divided into two parts in the axial direction by double gap input cavity 130: the first input cavity 131 and the second input cavity 132.This first input cavity 131 and the second input cavity 132 are connected by the coupling slot 141 on public arm 140.Coaxial input cable 400 is to the first input cavity 131 feed-in microwaves, for double gap input cavity 130 provides input microwave power.Wherein, the high-frequency parameter of the first input cavity and the second input cavity is basically identical, and the coupling between them realizes by crescent coupling slot on public arm 140.
Fig. 3 is the profile shown in Fig. 1 with public arm in the inductive output tube of double gap input cavity.As shown in Figure 3, public arm 140 integral body are annular.In the periphery of public arm 140, crescent coupling slot 141 is set.
In the present embodiment, coupling slot 141 is crescent, but the present invention is not as limit.The shape of this coupling slot can also be the various shapes such as circular, oval, rectangle or triangle, and the parameter such as the radian of this coupling slot, width all can design according to specific needs.
As shown in Figure 2, output cavity 200 is connected to the input system 100 of front end by electronic isolation pottery 210.Anode head 115 is fixed on the periphery of input cavity 200 front end horn openings.The high-frequency energy of these output cavity 200 interior generations is by coaxial output cable 500 output microwaves.
Collector 300 is hollow cavity structure, by collector insulating ceramics 310 and output cavity 200, is connected and fixed.Electron beam after note-Bo of output cavity 200 mutual effect is collected the utmost point 300 absorptions with the form of heat.
Below introduce the operation principle of the present embodiment double gap input cavity induction output cavity:
(1) heater 113 heated cathode 112, negative electrode 112 provides electronics under hot state;
(2) coaxial input cable 500 feed-in microwaves, the first input cavity 131 and the second input cavity 132 are coupled by coupling slot 141, in the first gap 116 and 117 places, the second gap, produce high-frequency electric field, make from cathode emission electronics out, compare with single gap input cavity, its density modulation obtains more abundant, and density modulation is larger, the high fdrequency component that electron beam carries will be more, for output cavity provides more high-frequency microwave energy;
(3) electron beam after density modulation is focused on and accelerates by anode head 115, with output cavity 200, energy exchange occurs, and high-frequency energy is from coaxial output cable 600 outputs, and remaining electronics is collected the utmost point 300 with the form recovery of heat.
So far, by reference to the accompanying drawings the present embodiment be have been described in detail.According to above, describe, the inductive output tube that those skilled in the art should have a double gap input cavity to the present invention has had clearly understanding.
In addition, the above-mentioned definition to each element is not limited in various concrete structures or the shape of mentioning in execution mode, and those of ordinary skill in the art can know simply and replace it, for example:
(1) double gap input cavity 130 is not limited only to cylinder reentry type Extended interaction oscillator, and off-gauge similar structures can be replaced;
(2) on public arm, the parameter such as coupling slot shape, radian, width and thickness can be adjusted as required.
In sum, the present invention has the inductive output tube of double gap input cavity, owing to having adopted double gap input cavity, there is its unique advantage improving aspect bandwidth, gain and power, solving that traditional klystron is large at low-frequency range volume, cost is high, maintenance is complicated, deficiency low, that frequency band is narrow and power is little gains.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an inductive output tube with double gap input cavity, is characterized in that, comprising:
Input system (100), has a double gap input cavity (130), for utilizing the microwave of extraneous input to carry out density modulation to electron beam;
Output cavity (200), is connected and fixed on the rear end of input system (100), and the electron beam after density modulation carries out energy exchange in this output cavity (200), and the high-frequency energy of generation is exported to the external world; And
Collector (300), is connected and fixed on described output cavity rear end, for the excess electron after harvest energy exchange.
2. inductive output tube according to claim 1, is characterized in that, described input system (100) comprising:
Grided electron gun (110)
Input cavity shell (120) is cylindric, is sheathed on the periphery of described grided electron gun, and with its sealing and be electrically insulated;
Wherein, the outside of described grided electron gun (110), the inner side of input cavity shell (120) forms described double gap input cavity (130).
3. inductive output tube according to claim 2, is characterized in that, described grided electron gun comprises:
Housing (111), is cylindric;
Negative electrode (112), curved structure, is fixed on described housing (111) open rearward end place, and recessed towards housing inner side; And
Grid (114), is network structure, is arranged at outside described housing (111), and it keeps sphere parallel with described negative electrode (112);
Wherein, between described grid (114) and negative electrode (112), form the first gap (116), between described grid (114) and the rear end horn opening of double gap input cavity (130), form the second gap (117).
4. inductive output tube according to claim 3, is characterized in that, described grided electron gun also comprises:
Heater (113), is arranged in described housing (111) inner side of described negative electrode (112); And
Anode head (115), is fixed on the radial outer periphery of described output cavity (200) front end horn opening.
5. inductive output tube according to claim 3, is characterized in that:
Described grid is connected to the inner side of input cavity shell (120) by the circular public arm (140) of radial outer periphery;
Described grid (114) and public arm (140) are divided into described double gap input cavity (130) in the axial direction: the first input cavity (131) and the second input cavity (132), and this two input cavity is connected by the coupling slot (141) on public arm (140);
Coaxial input cable (400) is to described the first input cavity (131) feed-in microwave, thereby provides input microwave power for described double gap input cavity (130).
6. inductive output tube according to claim 5, is characterized in that, described coupling slot be shaped as crescent, circle, ellipse, rectangle or triangle.
7. inductive output tube according to claim 6, is characterized in that, described coupling slot be shaped as crescent, described double gap input cavity (130) is cylinder reentry type Extended interaction oscillator.
8. according to the inductive output tube described in any one in claim 1 to 7, it is characterized in that, described output cavity (200) is connected and fixed by electron gun insulating ceramics (210) and described input system (100), and the horn opening of its front end is aimed at the horn opening of described double gap input cavity (130) rear end.
9. inductive output tube according to claim 8, is characterized in that, the high-frequency energy producing in described output cavity (200) is by coaxial output cable (500) output microwave.
10. according to the inductive output tube described in any one in claim 1 to 7, it is characterized in that, described collector is hollow cavity structure, by collector insulating ceramics (310) and described output cavity (200), be connected and fixed, the horn opening of its front end is aimed at the horn opening of described output cavity (200) rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350663.6A CN104124125A (en) | 2014-07-22 | 2014-07-22 | Induction output tube with double-gap input cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350663.6A CN104124125A (en) | 2014-07-22 | 2014-07-22 | Induction output tube with double-gap input cavity |
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| CN104124125A true CN104124125A (en) | 2014-10-29 |
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| CN201410350663.6A Pending CN104124125A (en) | 2014-07-22 | 2014-07-22 | Induction output tube with double-gap input cavity |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103733A (en) * | 1993-04-13 | 1995-06-14 | Eev有限公司 | Electron beam tube arrangements |
| CN1146621A (en) * | 1995-07-12 | 1997-04-02 | Eev有限公司 | Liner electron-beam tube |
| US5650751A (en) * | 1993-09-03 | 1997-07-22 | Litton Systems, Inc. | Inductive output tube with multistage depressed collector electrodes providing a near-constant efficiency |
| US6232721B1 (en) * | 2000-06-19 | 2001-05-15 | Harris Corporation | Inductive output tube (IOT) amplifier system |
-
2014
- 2014-07-22 CN CN201410350663.6A patent/CN104124125A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103733A (en) * | 1993-04-13 | 1995-06-14 | Eev有限公司 | Electron beam tube arrangements |
| US5650751A (en) * | 1993-09-03 | 1997-07-22 | Litton Systems, Inc. | Inductive output tube with multistage depressed collector electrodes providing a near-constant efficiency |
| CN1146621A (en) * | 1995-07-12 | 1997-04-02 | Eev有限公司 | Liner electron-beam tube |
| US6232721B1 (en) * | 2000-06-19 | 2001-05-15 | Harris Corporation | Inductive output tube (IOT) amplifier system |
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