CN102856623A - 3/4 lambda wavelength output resonant cavity of radio-frequency broadband high-power valve amplifier - Google Patents
3/4 lambda wavelength output resonant cavity of radio-frequency broadband high-power valve amplifier Download PDFInfo
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- CN102856623A CN102856623A CN2012102570208A CN201210257020A CN102856623A CN 102856623 A CN102856623 A CN 102856623A CN 2012102570208 A CN2012102570208 A CN 2012102570208A CN 201210257020 A CN201210257020 A CN 201210257020A CN 102856623 A CN102856623 A CN 102856623A
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Abstract
The invention discloses a 3/4 lambda wavelength output resonant cavity of a radio-frequency broadband high-power valve amplifier. The resonant cavity is used for tuning and deploying a radio-frequency broadband high-power valve amplifier output circuit, and comprises a resonant cavity inner conductor, a resonant cavity outer conductor, an output coupling capacitor, an output coupling capacitor tuning device, a radio-frequency output coaxial feeder, a coaxial film direct current blocking capacitor, a resonant cavity short circuit cavity plate and a resonant cavity short circuit cavity plate tuning device. By means of the technical scheme, the maximum output power achieves 100 kilowatts to 250 kilowatts (continuous wave and pulse dual modes), and the working frequency is output at an amplified radio frequency in a range of 70 MHz to 110 MHz, accordingly, necessary conditions are provided for particle acceleration of equipment of nuclear fusion microwave heating equipment, heavy particle accelerators, irradiation accelerators and the like.
Description
Technical field
The present invention relates to the resonant cavity technical field, particularly relate to a kind of rf broadband high-power tube amplifier 3/4 λ wavelength output cavity.
Background technology
In the prior art, the routine techniques scheme of output cavity is the structure of 1/4 λ short circuit resonant cavity+coupling capacitance, the electron tube distributed constant of the output cavity of this structure is to the restriction of high-frequency 1/4 λ wavelength dimension, so be difficult to realize high power transmission, thereby can not satisfy the requirement greater than the radio frequency power output more than the 70MHz frequency.
Summary of the invention
The invention provides a kind of rf broadband high-power tube amplifier 3/4 λ wavelength output cavity, can not satisfy problem greater than the requirement of the radio frequency power output more than the 70MHz frequency to solve prior art.
The invention provides kind rf broadband high-power tube amplifier 3/4 a λ wavelength output cavity, be used to rf broadband high-power tube amplifier output loop to carry out tuning allotment, comprise: resonant cavity inner wire, resonant cavity outer conductor, output coupling capacitor, output coupling capacitor tuner, radio frequency output coaxial feeder, coaxial film capacitance, resonant cavity short circuit chamber plate and resonant cavity short circuit chamber plate tuner; Resonant cavity inner wire and resonant cavity outer conductor are coaxial configuration; Be provided with resonant cavity short circuit chamber plate in the resonant cavity between resonant cavity inner wire resonant cavity outer conductor, resonant cavity short circuit chamber plate is used for carrying out tuning according to the frequency of radio-frequency power output to resonant cavity; Resonant cavity short circuit chamber plate tuner is connected with resonant cavity short circuit chamber plate, is used for regulating the position of resonant cavity short circuit chamber plate; The resonant cavity inner wire is connected with the anode of discharge-tube amplifier by the coaxial film capacitance of bottom, is used for the radio-frequency power that discharge-tube amplifier sends is transmitted; Output coupling capacitor is arranged on the position corresponding with radio frequency output coaxial feeder in the resonant cavity between the resonant cavity inner wire resonant cavity outer conductor, is used for the radio frequency power stage is allocated; One end of the humorous device of output coupling capacitor is connected with output coupling capacitor, and passes the inside of radio frequency output coaxial feeder, and its other end is exposed to outside the resonant cavity outer conductor, is used for the size of regulation output coupling capacitance; Radio frequency output coaxial feeder is arranged on the resonant cavity outer conductor, is used for carrying out radio-frequency power output.
Preferably, the resonant cavity inner wire is square-shaped frame shelf structure or coaxial configuration.
Preferably, the resonant cavity outer conductor is the square-shaped frame shelf structure.
Preferably, resonant cavity adopts 3/4 λ cavity body structure form.
Preferably, be provided with openable window on the resonant cavity inner wire, be used for installing or taking out discharge-tube amplifier.
Preferably, resonant cavity short circuit chamber plate adopts the reed skateboard to be connected with resonant cavity inner wire resonant cavity outer conductor.
Preferably, radio frequency output coaxial feeder carries out the radio-frequency power output of 250KW within 70MHz to 110MHz frequency range.
Beneficial effect of the present invention is as follows:
By output loop is carried out tuning allotment, all adopt the form in coaxial short chamber, tuning by the length cavity that changes the short circuit chamber, solved the problem that can not satisfy in the prior art greater than the requirement of the radio frequency power output more than the 70MHz frequency, can cover 70～110MHz frequency range, solve the bottleneck of RF high power output and 70 ~ 110MHz upper frequency link, radio frequency intensity tuning coupling output is realized smoothly, played conclusive effect.In addition, the technical scheme of the embodiment of the invention has solved power output maximum 100 ~ 250kW(well, and to involve continuously pulse double mode), operating frequency is amplified output at 70 ~ 110MHz radio-frequency power, for the particle of the equipment such as nuclear fusion microwave heating equipment, heavy particle accelerator, irradiation accelerator accelerates to provide necessary condition.
Description of drawings
Fig. 1 is the structural representation of the rf broadband high-power tube amplifier 3/4 λ wavelength output cavity of the embodiment of the invention;
Fig. 2 is the schematic diagram of the 250kW cavity body structure parts in kind of the embodiment of the invention;
Fig. 3 is the circuit diagram of the radio frequency resonant output cavity of the embodiment of the invention;
Fig. 4 is that the radio frequency output cavity of the embodiment of the invention calculates schematic equivalent circuit;
Fig. 5 is that actual working state collection sectional drawing is put in the 250kW chamber of the embodiment of the invention.
Embodiment
In order to solve the problem that can not satisfy in the prior art greater than the requirement of the radio frequency power output more than the 70MHz frequency, the invention provides a kind of rf broadband high-power tube amplifier 3/4 λ wavelength output cavity, the rf broadband high-power tube amplifier 3/4 λ wavelength output cavity of the embodiment of the invention uses design for high-power metal ceramic electronic tetrode amplifier output loop, be used for the intensity tuning allotment, the discharge-tube amplifier output loop, requirement is in 70MHz to 110MHz frequency range, output 250kW radio frequency continuous wave power, there is not the lumped parameter vacuum capacitance of enough power capacities to realize above-mentioned coupling in the prior art, so output loop is carried out tuning allotment, all adopt the form in coaxial short chamber, tuning by the length cavity that changes the short circuit chamber.Can cover 70～110MHz frequency range.Include according to the rf broadband high-power tube amplifier 3/4 λ wavelength output cavity of the embodiment of the invention and can regulate resonance inner wire, outer conductor, radio frequency output coaxial feeder etc.The inner wire of 3/4 λ wavelength output cavity is square or coaxial configuration, and outer conductor is square structure; Described inner wire is connected with wing by coaxial film capacitance, is used for the radio-frequency power transmission.
Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, does not limit the present invention.
According to embodiments of the invention, a kind of rf broadband high-power tube amplifier 3/4 λ wavelength output cavity is provided, be used to rf broadband high-power tube amplifier output loop to carry out tuning allotment.Fig. 1 is the structural representation of the rf broadband high-power tube amplifier 3/4 λ wavelength output cavity of the embodiment of the invention, as shown in Figure 1, the rf broadband high-power tube amplifier 3/4 λ wavelength output cavity according to the embodiment of the invention comprises: resonant cavity inner wire 10, resonant cavity outer conductor 11, output coupling capacitor 12, output coupling capacitor tuner 13, radio frequency output coaxial feeder 14, coaxial film capacitance 15, resonant cavity short circuit chamber plate 16 and resonant cavity short circuit chamber plate tuner 17; Below the modules of the embodiment of the invention is described in detail.
Resonant cavity inner wire 10 is coaxial configuration with resonant cavity outer conductor 11; Wherein, resonant cavity inner wire 10 is square-shaped frame shelf structure or coaxial configuration.Resonant cavity outer conductor 11 is the square-shaped frame shelf structure.Preferably, be provided with openable window on the resonant cavity inner wire 10, be used for installing or taking out discharge-tube amplifier.
Be provided with resonant cavity short circuit chamber plate 16 in the resonant cavity between resonant cavity inner wire 10 resonant cavity outer conductors 11, resonant cavity short circuit chamber plate 16 is used for carrying out tuning according to the frequency of radio-frequency power output to resonant cavity; Above-mentioned resonant cavity adopts 3/4 λ cavity body structure form.Preferably, resonant cavity short circuit chamber plate 16 adopts the reed skateboard to be connected with resonant cavity inner wire 10 resonant cavity outer conductors 11.
Resonant cavity short circuit chamber plate tuner 17 is connected with resonant cavity short circuit chamber plate 16, is used for regulating the position of resonant cavity short circuit chamber plate 16;
Resonant cavity inner wire 10 is connected with the anode of discharge-tube amplifier by the coaxial film capacitance 15 of bottom, is used for the radio-frequency power that discharge-tube amplifier sends is transmitted;
Output coupling capacitor 12 is arranged in the resonant cavity between the resonant cavity inner wire 10 resonant cavity outer conductors 11 on the position corresponding with radio frequency output coaxial feeder 14, is used for the radio frequency power stage is allocated;
One end of output coupling capacitor tuner 13 is connected with output coupling capacitor 12, and passes the inside of radio frequency output coaxial feeder 14, and its other end is exposed to outside the resonant cavity outer conductor 11, is used for the size of regulation output coupling capacitance 12;
Radio frequency output coaxial feeder 14 is arranged on the resonant cavity outer conductor 11, is used for carrying out radio-frequency power output.Preferably, radio frequency output coaxial feeder 14 carries out the radio-frequency power output of 250KW within 70MHz to 110MHz frequency range.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the invention is elaborated.
Fig. 2 is the schematic diagram of the 250kW cavity body structure parts in kind of the embodiment of the invention, as shown in Figure 2, comprising: output cavity 1, output cavity inner chamber 2, anode block capacitor 3, screen input capacitance 4, electronics tetrode 5, electron tube input cavity 6, negative electrode cooling blower 7, cavity cooling blower 8, signal filtering dividing plate 9, door switch 10, output coaxial feeder 11, output coupling capacitor tuner 12 and output measuring head 13.
Output loop according to the 250kW power amplifier of the embodiment of the invention adopts the defeated chamber of single-tunded circuit, internal and external conductor can be designed to square or column type, electron tube can be opened from inner chamber and install the rectangular window or take out, and does not need mobile cavity, and is easy to maintenance.Fig. 3 is the circuit diagram of the radio frequency resonant output cavity of the embodiment of the invention, and as shown in Figure 3, it mainly is comprised of following components: output cavity equivalent inductance L201 and tuner M4, output coupling capacitor C201 and tuner M5 etc.
Fig. 4 is that the radio frequency output cavity of the embodiment of the invention calculates schematic equivalent circuit, as shown in Figure 4, Co electron tube output distributed capacitance, C202 is the anode capacitance, can be considered short circuit concerning radiofrequency signal.Roe is wing output impedance, and C205 is electron tube screen direct-to-ground capacitance, and C206 is the electronic tube grid direct-to-ground capacitance, and L204 is the wing rf choke ring.
Fig. 5 is that actual working state collection sectional drawing is put in the 250kW chamber of the embodiment of the invention.
Can calculate the long and output coupling capacitor value in chamber according to microwave transmission line and matching network theory.
Because the cavity below is subject to electron tube, the impact of the various distributed constants of capacitance and output connector, the cavity equivalent model can change to some extent, so above-mentioned data need further to determine optimum value in the middle of actual accent machine.
In sum, technical scheme by means of the embodiment of the invention, by output loop is carried out tuning allotment, all adopt the form in coaxial short chamber, tuning by the length cavity that changes the short circuit chamber, solved the problem that can not satisfy in the prior art greater than the requirement of the radio frequency power output more than the 70MHz frequency, can cover 70～110MHz frequency range, solve the bottleneck of RF high power output and 70 ~ 110MHz upper frequency link, radio frequency intensity tuning coupling output is realized smoothly, played conclusive effect.In addition, the technical scheme of the embodiment of the invention has solved power output maximum 100 ~ 250kW(well, and to involve continuously pulse double mode), operating frequency is amplified output at 70 ~ 110MHz radio-frequency power, for the particle of the equipment such as nuclear fusion microwave heating equipment, heavy particle accelerator, irradiation accelerator accelerates to provide necessary condition.
Although be the example purpose, the preferred embodiments of the present invention are disclosed, it also is possible those skilled in the art will recognize various improvement, increase and replacement, therefore, scope of the present invention should be not limited to above-described embodiment.
Claims (7)
1. rf broadband high-power tube amplifier 3/4 λ wavelength output cavity, be used to rf broadband high-power tube amplifier output loop to carry out tuning allotment, it is characterized in that, comprising: resonant cavity inner wire, resonant cavity outer conductor, output coupling capacitor, output coupling capacitor tuner, radio frequency output coaxial feeder, coaxial film capacitance, resonant cavity short circuit chamber plate and resonant cavity short circuit chamber plate tuner;
Described resonant cavity inner wire and described resonant cavity outer conductor are coaxial configuration; Be provided with described resonant cavity short circuit chamber plate in the resonant cavity between described resonant cavity inner wire and described resonant cavity outer conductor, described resonant cavity short circuit chamber plate is used for carrying out tuning according to the frequency of radio-frequency power output to described resonant cavity; Described resonant cavity short circuit chamber plate tuner is connected with described resonant cavity short circuit chamber plate, is used for regulating the position of described resonant cavity short circuit chamber plate; Described resonant cavity inner wire is connected with the anode of described discharge-tube amplifier by the described coaxial film capacitance of bottom, is used for the radio-frequency power that described discharge-tube amplifier sends is transmitted; Described output coupling capacitor is arranged on the position corresponding with described radio frequency output coaxial feeder in the resonant cavity between described resonant cavity inner wire and the described resonant cavity outer conductor, is used for the radio frequency power stage is allocated; One end of the humorous device of described output coupling capacitor is connected with described output coupling capacitor, and passes the inside of described radio frequency output coaxial feeder, and its other end is exposed to outside the described resonant cavity outer conductor, is used for the size of regulating described output coupling capacitor; Described radio frequency output coaxial feeder is arranged on the described resonant cavity outer conductor, is used for carrying out radio-frequency power output.
2. resonant cavity as claimed in claim 1 is characterized in that, described resonant cavity inner wire is square-shaped frame shelf structure or coaxial configuration.
3. resonant cavity as claimed in claim 2 is characterized in that, described resonant cavity outer conductor is the square-shaped frame shelf structure.
4. resonant cavity as claimed in claim 3 is characterized in that, described resonant cavity adopts 3/4 λ cavity body structure form.
5. resonant cavity as claimed in claim 1 is characterized in that, is provided with openable window on the described resonant cavity inner wire, is used for installing or taking out described discharge-tube amplifier.
6. resonant cavity as claimed in claim 1 is characterized in that, described resonant cavity short circuit chamber plate adopts reed skateboard and described resonant cavity inner wire and is connected the resonant cavity outer conductor and is connected.
7. resonant cavity as claimed in claim 1 is characterized in that, described radio frequency output coaxial feeder carries out the radio-frequency power output of 250KW within 70MHz to 110MHz frequency range.
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| CN201210257020.8A CN102856623B (en) | 2012-07-23 | 2012-07-23 | Rf broadband high-power tube amplifier 3/4 λ wavelength output cavity |
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| CN201210257020.8A CN102856623B (en) | 2012-07-23 | 2012-07-23 | Rf broadband high-power tube amplifier 3/4 λ wavelength output cavity |
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| CN102856623A true CN102856623A (en) | 2013-01-02 |
| CN102856623B CN102856623B (en) | 2016-06-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108476028A (en) * | 2015-11-13 | 2018-08-31 | 天工方案公司 | Integrated switch filter network |
| CN110534860A (en) * | 2019-08-19 | 2019-12-03 | 南京从景生物技术有限公司 | A kind of New Ring-like Type resonant cavity |
| CN116646702A (en) * | 2023-07-25 | 2023-08-25 | 安徽曦融兆波科技有限公司 | Adjustable short-circuit support joint for resonant cavity of high-power transmitter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201025628Y (en) * | 2006-12-31 | 2008-02-20 | 北京北广科技股份有限公司 | Folding broadband coupling resonance cavity |
| CN202084622U (en) * | 2010-10-14 | 2011-12-21 | 中国科学院等离子体物理研究所 | Coaxially foldable output resonant cavities of broadband radio-frequency high-power electronic tube amplifier |
-
2012
- 2012-07-23 CN CN201210257020.8A patent/CN102856623B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201025628Y (en) * | 2006-12-31 | 2008-02-20 | 北京北广科技股份有限公司 | Folding broadband coupling resonance cavity |
| CN202084622U (en) * | 2010-10-14 | 2011-12-21 | 中国科学院等离子体物理研究所 | Coaxially foldable output resonant cavities of broadband radio-frequency high-power electronic tube amplifier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108476028A (en) * | 2015-11-13 | 2018-08-31 | 天工方案公司 | Integrated switch filter network |
| CN110534860A (en) * | 2019-08-19 | 2019-12-03 | 南京从景生物技术有限公司 | A kind of New Ring-like Type resonant cavity |
| CN116646702A (en) * | 2023-07-25 | 2023-08-25 | 安徽曦融兆波科技有限公司 | Adjustable short-circuit support joint for resonant cavity of high-power transmitter |
| CN116646702B (en) * | 2023-07-25 | 2024-01-05 | 安徽曦融兆波科技有限公司 | Adjustable short-circuit support joint for resonant cavity of high-power transmitter |
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| CN102856623B (en) | 2016-06-08 |
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Address after: 100853 3 floor, 86 building, 50 Yongding Road, Haidian District, Beijing. Patentee after: Beijing Guangtong Aerospace Science and Technology Co Ltd Address before: 100854 three floor, 86 building, 50 Yongding Road, Haidian District, Beijing. Patentee before: Beijing Changfeng Broadcasting Communication Equipment Co., Ltd. |
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