CN113206366A - Frequency-locked electromagnetic wave source - Google Patents
Frequency-locked electromagnetic wave source Download PDFInfo
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- CN113206366A CN113206366A CN202110624905.6A CN202110624905A CN113206366A CN 113206366 A CN113206366 A CN 113206366A CN 202110624905 A CN202110624905 A CN 202110624905A CN 113206366 A CN113206366 A CN 113206366A
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- 230000001954 sterilising effect Effects 0.000 abstract description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
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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
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Abstract
The invention discloses a design scheme of a frequency-locked electromagnetic wave source. A narrow-band-pass filter is added between an electromagnetic wave seed source and an electromagnetic wave oscillator, so that the frequency spectrum width of the electromagnetic wave seed source is far narrower than that of the electromagnetic wave oscillator, a high-power electromagnetic wave oscillator can be locked by the electromagnetic wave seed source with a small signal, and the electromagnetic wave source with high power and high quality frequency spectrum and high cost performance can be obtained. The frequency-locked electromagnetic wave source has the characteristics of small volume, high power, low manufacturing cost and the like, and can be widely applied to the fields of high-power radio frequency microwave accelerators, radio frequency microwave energy application and the like. By adopting the continuous pulse electromagnetic wave oscillator and the continuous wave solid electromagnetic wave source, the high-performance-price-ratio continuous pulse electromagnetic wave source with high power and high quality frequency spectrum can be obtained. The continuous pulse electromagnetic wave source can be widely applied to many fields, in particular to the field of non-thermal effect radio frequency microwave sterilization of food.
Description
Technical Field
The invention relates to a frequency-locked electromagnetic wave source. In particular to a technology for obtaining a high-performance-price ratio high-power electromagnetic wave source by locking one electromagnetic wave source with smaller power and better frequency spectrum quality with the other electromagnetic wave source with larger power and poorer frequency spectrum quality.
Background
In various electromagnetic wave systems, the electromagnetic wave source is the heart of the entire system, providing electromagnetic wave energy to the entire system. Among various electromagnetic wave sources, the electric vacuum oscillator is relatively simple in technology, relatively high in output power, relatively low in price per unit power, and poor in spectrum quality. The electromagnetic wave source with high performance-price ratio and high spectral quality can be obtained by adopting a seed source with low power and high spectral quality to lock the frequency spectrum of the electric vacuum oscillator. However, in the existing electromagnetic wave source frequency locking technology, the output signal of the electric vacuum oscillator can affect the normal operation of the seed source, even burn out the seed source.
Disclosure of Invention
The invention aims to provide a frequency-locked electromagnetic wave source with high cost performance. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a frequency-locked electromagnetic wave source comprises an electromagnetic wave source A, a three-port circulator A and an electromagnetic wave source B. The circulator A has a port AA, a port AB and a port AC. The electromagnetic wave flow direction is from port AA to port AB, from port AB to port AC, and from port AC to port AA. And the electromagnetic wave source B is communicated with a port AA of the circulator A. The electromagnetic wave source A is communicated with a port AB of the circulator A. And the port AC of the circulator A is the output end of the frequency-locking electromagnetic wave source. Electromagnetic wave energy can be delivered to an electromagnetic wave system through an output of the electromagnetic wave source.
The electromagnetic waves include, but are not limited to, radio frequency waves and microwaves, and may also include millimeter waves and terahertz waves.
In order to prevent electromagnetic waves generated by the electromagnetic wave source A from entering the electromagnetic wave source B from the output end of the electromagnetic wave source B due to mismatched reflection of the output end of the frequency-locked electromagnetic wave source, so that the normal work of the electromagnetic wave source B is influenced, and even the electromagnetic wave source B is burnt, a band-pass filter is arranged between the electromagnetic wave source B and a port AA of the circulator A.
In actual work, the center frequency of the frequency spectrum of the electromagnetic wave source B is firstly adjusted to be close to the center frequency of the frequency spectrum of the electromagnetic wave source A in free work, and then the center frequency of the passband of the band-pass filter is adjusted to be overlapped with the center frequency of the frequency spectrum of the electromagnetic wave source B.
In a preferred design, the band-pass filter is a waveguide pin tuner. The waveguide pin tuner can be used for realizing a tunable band-pass filter with high cost performance. The waveguide pin tuner has 3 pins, but may have more than three pins, such as 4, 5, 6, etc.
In order to realize the output of continuous pulse electromagnetic wave with high quality frequency spectrum, the output of the electromagnetic wave source A is continuous pulse electromagnetic wave, and the output of the electromagnetic wave source B is continuous wave electromagnetic wave.
In a preferred design, the electromagnetic wave source a is a magnetron, and the electromagnetic wave source B is a solid source.
In order to further prevent electromagnetic waves generated by the electromagnetic wave source A from entering the electromagnetic wave source B from the output end of the electromagnetic wave source B due to mismatched reflection of the output end of the frequency-locked electromagnetic wave source, so that the normal work of the electromagnetic wave source B is influenced, and even the electromagnetic wave source B is burnt, the frequency-locked electromagnetic wave source further comprises a three-port circulator B and a matched load. The circulator B has a port BA, a port BB, and a port BC. The electromagnetic wave flows in the direction from port BA to port BB, from port BB to port BC, and from port BC to port BA. The port BB of the circulator B communicates with the port AC of the circulator a. The port BA of the circulator B is in communication with the matched load. At this time, the port BC of the circulator B is the output end of the frequency-locked electromagnetic wave source.
In order to effectively isolate the electromagnetic wave source A from the electromagnetic wave source B, the relative difference between the central frequency of the frequency spectrum of the electromagnetic wave source B and the central frequency of the electromagnetic wave source A is less than four thousandths. The 10dB bandwidth of the band-pass filter is less than 1/6 of the 10dB spectral bandwidth of the electromagnetic wave source A.
In order to allow the electromagnetic wave generated by the electromagnetic wave source B to be smoothly injected into the electromagnetic wave source a, the relative difference between the center frequency of the pass band of the band-pass filter and the center frequency of the electromagnetic wave source B is less than one ten thousandth. And the 3dB bandwidth of the band-pass filter is 1-3 times of the 3dB frequency spectrum bandwidth of the electromagnetic wave source B. Furthermore, the 3dB bandwidth of the band-pass filter is 3-10 times of the 3dB frequency spectrum bandwidth of the electromagnetic wave source B.
In a preferred design, the center frequency of the frequency spectrum of the electromagnetic wave source B is the same as the center frequency of the electromagnetic wave source a. The 10dB bandwidth of the band-pass filter is less than 1/10 of the 10dB spectral bandwidth of the electromagnetic wave source A. The invention has the following beneficial effects:
the invention discloses a design scheme of a frequency-locked electromagnetic wave source. A narrow-band-pass filter is added between an electromagnetic wave seed source and an electromagnetic wave oscillator, the spectral width of the electromagnetic wave seed source is far narrower than that of the electromagnetic wave oscillator, and the passband bandwidth of the band-pass filter is between the spectral width of the electromagnetic wave seed source and that of the electromagnetic wave oscillator. In this way, the output electromagnetic wave energy of the electromagnetic wave seed source can be almost input into the electromagnetic wave oscillator, but only a small part of the electromagnetic wave energy output from the electromagnetic wave oscillator can be input into the electromagnetic wave seed source. The frequency-locked electromagnetic wave source can lock frequency of a high-power electromagnetic wave oscillator through a small-signal electromagnetic wave seed source, and the electromagnetic wave source with high performance-price ratio, high power and high quality frequency spectrum is obtained. The frequency-locked electromagnetic wave source has the characteristics of small volume, high power, low manufacturing cost and the like, and can be widely applied to the fields of high-power radio frequency microwave accelerators, radio frequency microwave energy heating and the like. By adopting the continuous pulse electromagnetic wave oscillator and the continuous wave solid electromagnetic wave source, the high-performance-price-ratio continuous pulse electromagnetic wave source with high power and high-quality frequency spectrum can be obtained. The continuous pulse electromagnetic wave source is widely applied to many fields, in particular to the field of non-thermal effect radio frequency microwave sterilization of food.
Drawings
FIG. 1 is a schematic representation of the invention and of example 1
FIG. 2 is a schematic diagram of example 2
The reference numbers in the drawings correspond to the names: 1-electromagnetic wave source A, 2-circulator A, 21-port AA, 22-port AB, 23-port AC, 3-band-pass filter, 4-electromagnetic wave source B, 5-circulator B, 51-port BA, 52-port BB, 53-port BC, 6-matched load.
Some of the terms specified in this specification are as follows:
the-3 dB passband bandwidth of the band pass filter refers to the bandwidth at which the insertion loss in the passband of the band pass filter is 3 dB. The-3 dB frequency spectrum bandwidth of the electromagnetic wave source A refers to the frequency spectrum width of the electromagnetic wave source A, which is lower than the frequency spectrum peak value by 3 dB. The-10 dB passband bandwidth of the band pass filter refers to the bandwidth at which the insertion loss in the passband of the band pass filter is 10 dB. The-10 dB frequency spectrum bandwidth of the electromagnetic wave source A refers to the frequency spectrum width of the electromagnetic wave source A, which is 10dB lower than the frequency spectrum peak value of the electromagnetic wave source A. Continuous pulsed electromagnetic waves, means that the electromagnetic waves are repetitive pulses of electromagnetic waves.
Detailed Description
Example 1
As shown in fig. 1.
A frequency-locked electromagnetic wave source is characterized by comprising an electromagnetic wave source A1, a three-port circulator A2 and an electromagnetic wave source B4. The circulator A2 has a port AA21, a port AB22 and a port AC23, and the electromagnetic wave flow direction is from the port AA21 to the port AB22, from the port AB22 to the port AC23, and from the port AC23 to the port AA 21. The electromagnetic wave source B4 is in communication with port AA21 of circulator A2. The electromagnetic wave source a1 communicates with port AB22 of circulator a 2. And the port AC23 of the circulator A2 is the output end of the frequency-locked electromagnetic wave source.
A band-pass filter 3 is also provided between the electromagnetic wave source B4 and the port AA21 of the circulator a 2. The band-pass filter 3 is a three-pin waveguide pin tuner.
The output of the electromagnetic wave source A1 is continuous pulse electromagnetic wave, and the output of the electromagnetic wave source B4 is continuous wave electromagnetic wave.
The electromagnetic wave source A1 is a magnetron, and the electromagnetic wave source B4 is a solid source.
The relative difference between the center frequency of the frequency spectrum of the electromagnetic wave source B4 and the center frequency of the frequency spectrum of the electromagnetic wave source A1 is less than four thousandths of an hour. The-10 dB passband bandwidth of the band pass filter 3 is less than 1/6 of the-10 dB spectral bandwidth of the electromagnetic wave source A1.
The relative difference between the center frequency of the pass band of the band-pass filter 3 and the center frequency of the electromagnetic wave source B4 is less than one ten thousandth. The-3 dB passband bandwidth of the band pass filter 3 is 3 times the-3 dB spectral bandwidth of the electromagnetic wave source B4.
Example 2
As shown in fig. 2.
Compared with the embodiment example 1, the difference is only that one three-port circulator B5 and one matching load 6 are further included. The circulator B5 has a port BA51, a port BB52 and a port BC53, and the flow direction of electromagnetic waves is from the port BA51 to the port BB52, from the port BB52 to the port BC53, and from the port BC53 to the port BA 51. The port BB52 of the circulator B5 communicates with the port AC23 of the circulator A2. Port BA51 of the circulator B5 communicates with the matched load 6. And a port BC53 of the circulator B5 is an output end of the frequency-locked electromagnetic wave source.
The design increases the cost of the frequency-locked electromagnetic wave source to a certain extent, but the mismatch of the output end of the frequency-locked electromagnetic wave source has less influence on the stability of the operation of the frequency-locked electromagnetic wave source.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. According to the technical spirit of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments within the spirit and principle of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A frequency-locked electromagnetic wave source is characterized by comprising an electromagnetic wave source A (1), a three-port circulator A (2) and an electromagnetic wave source B (4); the circulator A (2) is provided with a port AA (21), a port AB (22) and a port AC (23); the electromagnetic wave flow direction is from the port AA (21) to the port AB (22), from the port AB (22) to the port AC (23), and from the port AC (23) to the port AA (21); the electromagnetic wave source B (4) is communicated with a port AA (21) of the circulator A (2); the electromagnetic wave source A (1) is communicated with a port AB (22) of the circulator A (2); and the port AC (23) of the circulator A (2) is the output end of the frequency-locked electromagnetic wave source.
2. A frequency-locked electromagnetic wave source as claimed in claim 1, characterized in that a band-pass filter (3) is further arranged between said electromagnetic wave source B (4) and the port AA (21) of the circulator a (2).
3. A frequency-locked electromagnetic wave source as claimed in claim 2, characterized in that said band-pass filter (3) is a waveguide pin tuner.
4. The frequency-locked electromagnetic wave source according to claim 1, wherein the output of the electromagnetic wave source A (1) is a continuous pulse electromagnetic wave, and the output of the electromagnetic wave source B (4) is a continuous wave electromagnetic wave.
5. A frequency-locked electromagnetic wave source as claimed in claim 1, wherein said electromagnetic wave source a (1) is a magnetron and said electromagnetic wave source B (4) is a solid-state source.
6. A frequency-locked electromagnetic wave source as claimed in claim 1, characterized in that a band-pass filter (3) is provided between said electromagnetic wave source B (4) and the port AA (21) of the circulator a (2); the band-pass filter (3) is a waveguide pin tuner; the electromagnetic wave source A (1) is a magnetron, and the electromagnetic wave source B (4) is a solid source.
7. A frequency-locked electromagnetic wave source as claimed in claim 1, further comprising a three-port circulator B (5) and a matched load (6); the circulator B (5) has a port BA (51), a port BB (52), and a port BC (53); the electromagnetic wave flow direction is from port BA (51) to port BB (52), from port BB (52) to port BC (53), and from port BC (53) to port BA (51); the port BB (52) of the circulator B (5) communicates with the port AC (23) of the circulator A (2); a port BA (51) of the circulator B (5) is communicated with the matched load (6); a port BC (53) of the circulator B (5) is an output end of the frequency-locked electromagnetic wave source; a band-pass filter (3) is arranged between the electromagnetic wave source B (4) and the port AA (21) of the circulator A (2).
8. A frequency-locked electromagnetic wave source as claimed in claims 2 to 7, characterized in that a band-pass filter (3) is arranged between said electromagnetic wave source B (4) and the port AA (21) of the circulator A (2); the relative difference between the central frequency of the frequency spectrum of the electromagnetic wave source B (4) and the central frequency of the frequency spectrum of the electromagnetic wave source A (1) is less than four thousandths; the-10 dB passband bandwidth of the band-pass filter (3) is smaller than 1/6 of the-10 dB spectral bandwidth of the electromagnetic wave source A (1).
9. A frequency-locked electromagnetic wave source as claimed in claim 8, characterized in that a band-pass filter (3) is arranged between said electromagnetic wave source B (4) and the port AA (21) of the circulator A (2); the relative difference between the central frequency of the passband of the band-pass filter (3) and the central frequency of the electromagnetic wave source B (4) is less than one ten thousandth; the-3 dB passband bandwidth of the band-pass filter (3) is 1-3 times of the-3 dB frequency spectrum bandwidth of the electromagnetic wave source B (4).
10. A frequency-locked electromagnetic wave source as claimed in claim 8, characterized in that a band-pass filter (3) is arranged between said electromagnetic wave source B (4) and the port AA (21) of the circulator A (2); the relative difference between the central frequency of the passband of the band-pass filter (3) and the central frequency of the electromagnetic wave source B (4) is less than one ten thousandth; the-3 dB passband bandwidth of the band-pass filter (3) is 3-10 times of the-3 dB frequency spectrum bandwidth of the electromagnetic wave source B (4).
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| CN202110624905.6A CN113206366A (en) | 2021-06-04 | 2021-06-04 | Frequency-locked electromagnetic wave source |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007228219A (en) * | 2006-02-23 | 2007-09-06 | Idx Corp | Microwave device |
| US20110032605A1 (en) * | 2009-08-04 | 2011-02-10 | Jds Uniphase Corporation | Pulsed optical source |
| CN103208406A (en) * | 2013-04-02 | 2013-07-17 | 四川大学 | Artificial intelligent phase modulation injection locking continuous wave magnetron microwave source |
| CN104701117A (en) * | 2015-03-12 | 2015-06-10 | 四川大学 | Stray energy recovery injection frequency-looking magnetron microwave launching system |
| CN214542479U (en) * | 2021-06-04 | 2021-10-29 | 成都市吉亨特科技有限公司 | Frequency-locked electromagnetic wave source |
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- 2021-06-04 CN CN202110624905.6A patent/CN113206366A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007228219A (en) * | 2006-02-23 | 2007-09-06 | Idx Corp | Microwave device |
| US20110032605A1 (en) * | 2009-08-04 | 2011-02-10 | Jds Uniphase Corporation | Pulsed optical source |
| CN103208406A (en) * | 2013-04-02 | 2013-07-17 | 四川大学 | Artificial intelligent phase modulation injection locking continuous wave magnetron microwave source |
| CN104701117A (en) * | 2015-03-12 | 2015-06-10 | 四川大学 | Stray energy recovery injection frequency-looking magnetron microwave launching system |
| CN214542479U (en) * | 2021-06-04 | 2021-10-29 | 成都市吉亨特科技有限公司 | Frequency-locked electromagnetic wave source |
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