CN110011011A - A kind of high-field mode filter for only depositing TM mode - Google Patents
A kind of high-field mode filter for only depositing TM mode Download PDFInfo
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- CN110011011A CN110011011A CN201910372258.7A CN201910372258A CN110011011A CN 110011011 A CN110011011 A CN 110011011A CN 201910372258 A CN201910372258 A CN 201910372258A CN 110011011 A CN110011011 A CN 110011011A
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- mode
- resistivity
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Abstract
The invention discloses the high-field mode filters that one kind only deposits TM mode, the hollow structure formed including parasitic mode absorbent assembly and radiating subassembly, parasitic mode absorbent assembly includes the connecting flange at both ends and the resistivity anisotropy component being arranged between connecting flange, radiating subassembly includes the radiating piece of shell and hull outside, the case inside is axially provided with resistivity anisotropy component, under TM mode along angularly be loss characteristic, for resistivity much larger than axial resistivity, axial is good conductor；The present invention realizes filtering out to all non-TM modes using resistivity anisotropy material, has high power capacity, the characteristics of all non-TM mode parasitic modes filter out, based on the device, mode field in the electron tubes such as Virtual Cathode Oscillators (VCO), relativistic backward wave oscillator (RBWO), relativistic magnetron or high field radar system rotary joint can be carried out to control, to promote development and the application of microwave and millimeter wave the relevant technologies to establish certain technical foundation.
Description
Technical field
The present invention relates to microwave and millimeter wave technical field, in particular to it is a kind of work high field by force under mode filter,
The non-TM modes microwave signal of input can be decayed, be filtered out, only deposit the device of TM mode low-loss transmission.
Background technique
With the development of microwave source technology, microwave system to higher frequency, stronger field strength develop, transmission guided wave system also from
Coaxial waveguide, rectangular waveguide are changed into the higher mould circular waveguide excessively of power capacity.
The higher mode TM01 mould transmitted in circular waveguide, electric field it is vertical at circumference and rotational symmetry, phase stabilization, because
This becomes high field Millimeter-Wave Source, such as work of Virtual Cathode Oscillators (VCO), relativistic backward wave oscillator (RBWO), relativistic magnetron
Operation mode；Its symmetry also becomes the operating mode of the high field rotary joint in the systems such as high field radar.
But TM01 mode crosses mould for high-order, once structural perturbation, the easily parasitic modes such as generation circular waveguide basic mode TE11 and TE21,
These parasitic modes and high-field mode to be transmitted are locally being overlapped mutually increases, become the hidden of influence system stability and reliability
Suffer from, or even cause equipment badly damaged, therefore the high-field mode parasitic mode filtering research for only depositing TM mode need to be carried out.
Currently, the domestic research emphasis for filtering out (or control) to such high-field mode parasitic mode for only depositing TM mode mainly collects
In inside electric vacuum tube source, in metal waveguide by medium local loading absorb these methods of parasitic mode field it is higher to guarantee
TM mould output purity.Furthermore it works in the high field rotary joint of TM01 mode, main parasitic mode is produced by input, output coupling section
Raw, mode filters out means mainly by adding short-circuit cylinder reflection TE11 mode at input and output waveguide both ends and reducing wave
Leading diameter makes TE21 mode cutoff.
In conclusion to there are three types of parasitic mode suppressor modes: a) parasitic mode based on single mode transport ends mode；B) parasitic mode field is anti-
Penetrate mode；C) coated by dielectric absorption pattern.First way usually passes through reduction waveguide radius, can filter out cutoff frequency and be higher than
All parasitic mode modes of TM01 mode working frequency, if the TE21 mode in aforementioned rotary joint filters out mode, the disadvantage is that wave
It leads radius to become smaller, and then the power capacity that will lead to waveguide reduces, increases system sparking probability of malfunction；It is miscellaneous in the second way
Mould field is reflected in systems without exporting, if the TE11 mode in aforementioned rotary joint filters out mode, the disadvantage is that roundtrip
Microwave other microwave devices easy to damage；Two above method can only be effective for certain several specific parasitic mode simultaneously, and cannot be right
All parasitic modes are effective；In comparison, efficient absorption consumption is carried out to parasitic mode using coated by dielectric, can guarantees the function of system
Rate capacity, stability and reliability have biggish application advantage, such as aforementioned electric vacuum tube source, but conventional coated by dielectric
Absorption dissipation mode, also the absorption without selection consumes required work TM mode while absorbing consumption parasitic mode, this is not meet
Electrical performance indexes requirement to operating mode filter with low insertion loss；Simultaneously when the TM mould that system work is in high field TM mode, and medium dissipates
The power of formula and parasitic mode is very big, and it is excessively high to easily lead to loaded medium temperature, and then leads to microwave system failure.
National inventing patent (CN201711155968.1) discloses a kind of high-field mode filter for only depositing TE0n mode,
By being superposed to resistivity anisotropy component using axial sheet, so that TE0n mode is on wave guide wall only along angle
To waveguide wall current, can be substantially loss-free there are wall electric current, can substantially loss-free there are TE0n modes microwave letters
Number.
Therefore it is desirable to there is one mode filter, the parasitic mode of all non-TM modes is effectively filtered out, is provided simultaneously with
Higher power capacity promotes the development and application of microwave and millimeter wave system the relevant technologies.
Summary of the invention
The purpose of the invention is to complete the purification of high field millimeter-wave systems mode, a kind of mould for only depositing TM mode is provided
Formula filter.The device can realize that the loss to all non-TM modes filters out, and is provided simultaneously with higher power capacity.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of high-field mode filter for only depositing TM mode, the hollow structure including parasitic mode absorbent assembly and radiating subassembly composition,
Parasitic mode absorbent assembly includes the connecting flange at both ends and the resistivity anisotropy component being arranged between connecting flange, heat dissipation group
Part includes the radiating piece of shell and hull outside, and the case inside is axially provided with resistivity anisotropy component, TM
Along being angularly loss characteristic under mode, for resistivity much larger than axial resistivity, axial is good conductor.
In the above-mentioned technical solutions, the resistivity anisotropy component is equivalent to the cylinder being axially arranged
Body, cylindrical body are axially hollow structure.
In the above-mentioned technical solutions, when the resistivity anisotropy component axially has several independent circles
It is provided with isolation structure when cylinder forms, between two neighboring cylindrical body, the shell of the isolation structure and radiating subassembly is one
Body structure.
In the above-mentioned technical solutions, the isolation structure inner hole is matched with anisotropy component inner hole structure, isolation structure
Impedance matches with anisotropic material impedance.
In the above-mentioned technical solutions, it is completely smooth interior to constitute axial direction one for resistivity anisotropy component and isolation structure
Wall.
In the above-mentioned technical solutions, the resistivity anisotropy component is along angular multiple-layer stacked structure.
In the above-mentioned technical solutions, the aperture surface of the shell and resistivity anisotropy member outer surface structure matching,
The connection of the input terminal and output end of shell outer edge and connecting flange.
In the above-mentioned technical solutions, the both ends of the shell are respectively connected and sealed with connection, so that radiating subassembly institute
The space at place is not communicated with space locating for resistivity anisotropy component.
In the above-mentioned technical solutions, the radiating piece is that air-cooled or water-cooling structure radiates.
In the above-mentioned technical solutions, the resistivity anisotropy component can be anisotropy pyrolysis graphite, highly directional
Pyrolytic graphite, graphene, resistivity anisotropy material, heating conduction is close or is better than metallic aluminium, and the connecting flange can
Think one of various waveguides of circular waveguide flange, rectangular waveguide, elliptical waveguide, the impedance of connecting flange is with resistivity respectively to different
The impedance of property component matches.
The working principle of high-field mode filter apparatus of the invention are as follows: TM mode only has axial walls on wave guide wall
Electric current, and anisotropic material is similar to good conductor along axial resistivity, can substantially loss-free there are wall electric currents
It is substantially loss-free that there are TM modes microwave signals；Non- TM mode has waveguide wall current angularly on wave guide wall, and respectively to
The resistivity of unlike material angularly is similar to resistance loss material, the wall electric current of these non-TM modes can be worn away, i.e.,
The consume of these microwave signals is converted to the heat of material；The heat of the non-TM mode field conversion in this part is transmitted to scattered by shell
Thermal part is dissipated finally by mature thermal component, realizes the control to shell operating temperature, is finally completed high field work
When control to device operating temperature, the i.e. Pattern Filter for only depositing TM mode under realization high field working condition.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
Currently used Pattern Filter mode easily leads to the reduction of device power capacity or roundtrip microwave source easy to damage or increase
The TM mode that works transmits Insertion Loss, while any number of method cannot achieve effective inhibition to all non-TM parasitic modes.And it is of the invention
Although principle is lost based on coated by dielectric, filtering out to all non-TM modes is realized using resistivity anisotropy material,
Has high power capacity, the characteristics of all non-TM mode parasitic modes filter out.Based on the device, can carry out Virtual Cathode Oscillators (VCO),
Mode field control in the electron tubes such as relativistic backward wave oscillator (RBWO), relativistic magnetron or high field radar system rotary joint
System；To promote development and the application of microwave and millimeter wave the relevant technologies to establish certain technical foundation.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 only deposits the high-field mode filter composition schematic diagram of TM mode;
Fig. 2 is the schematic diagram of the section structure of resistivity anisotropy component；
In figure: 1 is radiating piece, and 2 be resistivity anisotropy component, and 3 be shell, and 4 be connecting flange, and 5 be isolation structure.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
As shown in Fig. 1, the composition block diagram of the present embodiment, device is made of parasitic mode absorbent assembly and radiating subassembly.It is wherein miscellaneous
Mould absorbent assembly includes: the connecting flange at both ends and the resistivity anisotropy component being connected between connecting flange, heat dissipation group
Part includes: the shell being connected as one with two connecting flanges and the thermal component that housing outer surface is arranged in.
The connecting flange includes input flange and output flange, the form of flange can for circular waveguide, rectangular waveguide,
The different types flange such as elliptical waveguide, output end are connect with the input terminal of resistivity anisotropy component, output impedance with
Resistivity anisotropy component input impedance matches, and material can be metal or other materials with metallic conduction characteristic
Material, inner hole are matched with resistivity anisotropy component inner hole structure, are also matched with output flange input terminal inner hole structure, side
Edge is closely connect with shell, has good capacity of heat transmission.
The resistivity anisotropy component is non-TM modes microwave, millimeter-wave signal absorbs or attenuating device.It is believed
It number absorbs or attenuating material can be anisotropy pyrolysis graphite, highly oriented pyrolytic graphite, the resistivity such as graphene respectively to different
Property component, as shown in Figure 1, it is good conductor along axial (i.e. Z-direction), resistivity is close to metals such as aluminium, copper；Angularly (i.e. r is flat
Face) it is loss characteristic, resistivity is much larger than axial resistivity.Resistivity anisotropy modular construction can be a cylinder or
The multiple cylinder tandem compounds for having gap of person.The connection of the output end of its input terminal and input flange, input impedance and input method
Blue output impedance matching；The connection of the input terminal of its output end and output flange, the input resistance of output impedance and output flange
It is anti-to match.Its inner hole is matched with input flange output end inner hole structure, is also matched with output flange input terminal inner hole structure,
Outer edge is closely connect with shell, has good capacity of heat transmission.When a cylinder forms, material is aforementioned resistivity
Anisotropy component.When anisotropy component be it is multiple be made of the cylinder in gap when, cylinder appoint so be aforementioned resistivity it is each
Anisotropy component, interstitial structure inner hole are matched with anisotropy component inner hole structure, interstitial structure impedance and anisotropy material
Material impedance matches, and material can be metal or the other materials with metallic conduction characteristic, has good thermally conductive, conductive
Performance.
In order to realize that resistivity anisotropy component is angularly (i.e. circumference to) loss characteristic, component is lost in anisotropy
Using multilayered structure, angularly (i.e. circumference to) is formed by several layers folded structures, as shown in Fig. 2, resistivity anisotropy
Component is cylindrical structure, and centre is hollow structure along axis portion, and entity part is several stratiform knots axially
Structure is formed by stacking an entirety, so that it has angularly (i.e. r plane) and is loss characteristic and is good along axial (i.e. Z-direction)
Conductor.
The shell is the shell of anisotropic material, is realized together with input flange, output flange to anisotropy portion
The fixation of part, while realizing and the heat of anisotropy component is transmitted to thermal component.Its material can be metal or thermal conductivity
It can good other materials.Its inner hole and anisotropy member outer surface structure matching.Shell outer edge and input flange export
End, output flange input terminal closely connect, and have good capacity of heat transmission.If filter uses water-cooling component, shell
Body should also have waterproof function after connecting with input flange, output flange.
The thermal component is made of for realizing the refrigerating function to shell general air-cooled or water-cooling section.
Embodiment one
It is within the scope of 27~42GHz large bandwidth, and TM01 mode and TM11 mode Insertion Loss are both less than 0.12dB, and TE11 parasitic mode
Field Insertion Loss is greater than 0.5dB, and TE21 parasitic mode field Insertion Loss is greater than 1.72dB, and structural schematic diagram is as shown in Figure 2.
Using resistivity anisotropy highly oriented pyrolytic graphite in this example device, as shown in Figure 1 in r to wall thickness 2mm,
Z is to long 200mm；Resistivity is 3.5~4.5 × 10 in Z-direction-7Ω .m, close to the 2.22 × 10 of metal platinum-7Ω .m has good
Good electric conductivity；Resistivity is angularly being 1.5~2.5 × 10-3Ω .m can effectively decay to wall electric current；Thermal conductivity is in Z
It is upwards 1600~2000W/m.k, much larger than the 200W/m.k of duralumin.The material is resistant to hot operation, and 2750 DEG C of whens are most hard,
400 DEG C or less aoxidize it is unobvious, therefore can be in long-term stable operation under atmospheric environment, while material out-gassing rate is extremely low, can also
Work is in a vacuum.
Shell in device uses brass material, and shell plays fixed and thermally conductive outward effect.
Input flange, output flange in device are standard round waveguide flange, using brass material.
Thermal component selects common water cooling thermal component in device, using 5000 W/m2/ DEG C as between shell and water of radiation
Heat transfer coefficient.
Multiple physical field emulation is carried out using mature business software CST, under 27 DEG C of operating ambient temperature, TE11,
The arbitrarily single parasitic mode input power of TE21, TM11, TM01 takes 5kW, and the maximum temperature rise of highly oriented pyrolytic graphite is less than in mode filter
60 DEG C, device performance is basically unchanged under the temperature rise, the device can in high field long-term stable operation.
By the implementation of the present embodiment, can solve traditional mode filtering mode can not be to all non-TM in high field TM system
The characteristics of mode parasitic mode filters out.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. one kind only deposits the high-field mode filter of TM mode, the hollow knot formed including parasitic mode absorbent assembly and radiating subassembly
Structure, parasitic mode absorbent assembly include the connecting flange at both ends and the resistivity anisotropy component being arranged between connecting flange, are dissipated
Hot component includes the radiating piece of shell and hull outside, it is characterised in that it is each that the case inside is axially provided with resistivity
Anisotropy component, along being angularly loss characteristic under TM mode, for resistivity much larger than axial resistivity, axial is good lead
Body.
2. the high-field mode filter that one kind according to claim 1 only deposits TM mode, it is characterised in that the resistivity
Anisotropy component is equivalent to the cylindrical body being axially arranged, and cylindrical body is axially hollow structure.
3. the high-field mode filter that one kind according to claim 2 only deposits TM mode, it is characterised in that when the resistance
When rate anisotropy component is axially made of several independent described cylindrical bodies, it is provided between two neighboring cylindrical body
The shell of isolation structure, the isolation structure and radiating subassembly is structure as a whole.
4. the high-field mode filter that one kind according to claim 3 only deposits TM mode, it is characterised in that the isolation junction
Structure inner hole is matched with anisotropy component inner hole structure, and isolation structure impedance matches with anisotropic material impedance.
5. the high-field mode filter that one kind according to claim 4 only deposits TM mode, it is characterised in that resistivity respectively to
Anisotropic component and isolation structure constitute an axial complete smooth inner wall.
6. the high-field mode filter that one kind according to claim 1 to 3 only deposits TM mode, it is characterised in that described
Resistivity anisotropy component is along angular multiple-layer stacked structure.
7. the high-field mode filter that one kind according to claim 1 only deposits TM mode, it is characterised in that the shell
Aperture surface and resistivity anisotropy member outer surface structure matching, the input terminal and output end of shell outer edge and connecting flange
Connection.
8. the high-field mode filter that one kind according to claim 1 only deposits TM mode, it is characterised in that the shell
Both ends are respectively connected and sealed with connection, so that sky locating for space locating for radiating subassembly and resistivity anisotropy component
Between be not communicated with.
9. the high-field mode filter that one kind according to claim 8 only deposits TM mode, it is characterised in that the radiating piece
It radiates for air-cooled or water-cooling structure.
10. the high-field mode filter that one kind according to claim 1 only deposits TM mode, it is characterised in that the resistivity
Anisotropy component can be anisotropy pyrolysis graphite, highly oriented pyrolytic graphite, graphene, resistivity anisotropy material,
Its heating conduction is close or is better than metallic aluminium, and the connecting flange can be various for circular waveguide method orchid, rectangular waveguide, elliptical waveguide
One of waveguide, the impedance of connecting flange and the impedance of resistivity anisotropy component match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910372258.7A CN110011011B (en) | 2019-05-06 | 2019-05-06 | Strong field mode filter only storing TM mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910372258.7A CN110011011B (en) | 2019-05-06 | 2019-05-06 | Strong field mode filter only storing TM mode |
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| Publication Number | Publication Date |
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| CN110011011A true CN110011011A (en) | 2019-07-12 |
| CN110011011B CN110011011B (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910372258.7A Expired - Fee Related CN110011011B (en) | 2019-05-06 | 2019-05-06 | Strong field mode filter only storing TM mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713370A (en) * | 2020-12-01 | 2021-04-27 | 成都飞机工业（集团）有限责任公司 | TM of electromagnetic wave of Ku waveband of circular waveguide0nMode filter |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713370A (en) * | 2020-12-01 | 2021-04-27 | 成都飞机工业（集团）有限责任公司 | TM of electromagnetic wave of Ku waveband of circular waveguide0nMode filter |
| CN112713370B (en) * | 2020-12-01 | 2021-09-07 | 成都飞机工业（集团）有限责任公司 | TM of electromagnetic wave of Ku waveband of circular waveguide0nMode filter |
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| CN110011011B (en) | 2020-10-27 |
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