CN107706494A - A kind of adjustable microwave resonator - Google Patents
A kind of adjustable microwave resonator Download PDFInfo
- Publication number
- CN107706494A CN107706494A CN201710906880.2A CN201710906880A CN107706494A CN 107706494 A CN107706494 A CN 107706494A CN 201710906880 A CN201710906880 A CN 201710906880A CN 107706494 A CN107706494 A CN 107706494A
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- Prior art keywords
- metallic cavity
- metal
- cavity
- liquid
- hole
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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
- H01P7/00—Resonators of the waveguide type
- H01P7/04—Coaxial resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/008—Manufacturing resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention belongs to the field of measuring technique of material electromagnetism parameter, and in particular to a kind of adjustable microwave resonator.The present invention substitutes air, and piston structure by filling the liquid of high-k in quarter-wave coaxial resonant cavity cavity, realizes miniaturization and the frequency-adjustable of quarter-wave coaxial resonant cavity.
Description
Technical field
The invention belongs to the field of measuring technique of material electromagnetism parameter, and in particular to a kind of adjustable microwave resonator.
Background technology
Nearly ten years, with the fast development of microwave technology, microwave dielectric material microwave communication, radar, Aero-Space,
It is used widely in medical treatment detection.Dielectric constant is one of most important parameter of microwave-medium, therefore in manufacture microwave-medium
During material, accurate Measuring Dielectric Constant tool is of great significance.
Conventional dielectric constant measurement method is the quarter-wave coaxial resonant cavity using distal aperture, passes through perforate
Contacted with dielectric material, the electric field in quarter-wave coaxial resonant cavity will be interfered, and be worked by measuring resonator
Front and rear resonant frequency and quality factor can be obtained by the dielectric constant of dielectric material；Therefore the coaxial resonance of quarter-wave
The design of chamber is particularly significant.
Existing quarter-wave coaxial resonant cavity is made up of metallic cavity and metallic inner conductor, and metallic cavity is led with interior
Air or solid are filled between body as medium.
The medium of the quarter-wave dovetail resonator filling used at present is air, and its relative dielectric constant is
1；In such as hundreds of megahertzs of low-frequency range, the length of its resonator is several tens cm.Excessive size is unfavorable in actual work
Use in journey.It is such as blue and the miniaturization of resonator is typically employed in the high dielectric constant material of intra resonant cavity addition solid
Jewel etc., or addition artificial structure, but these structures are fixed once its main mould frequency is completed in design, the regulation of conventional frequency
Means, such as plus tuning screw, change cavity length mode due to can destroy the solid material wherein added or artificial structure and
It can not use.If necessary to test multiple frequencies, it is necessary to which the resonator of different frequency, which greatly increases cost.
The content of the invention
Problem or deficiency be present for above-mentioned, to realize that the miniaturization of quarter-wave coaxial resonant cavity and frequency can simultaneously
The problem of tune, the invention provides a kind of adjustable microwave resonator, its filled media is liquid.
The adjustable microwave resonator, including metallic cavity and metal closures.Metal closures and the inner chamber size of metallic cavity are mutually fitted
Should, it is placed in being formed in the piston apparatus slided in metallic cavity in metallic cavity.
Metal closures are provided with input and delivery outlet, rubber piston, two water injection holes and metal column.
Input is consistent with standard sub-miniature A connector with delivery outlet size, for external sub-miniature A connector, due to reciprocity, input
Export interchangeable.
Metal column and metal closures are an entirety, and for metal column as metallic inner conductor, it is shorter in length than the height of metallic cavity
Degree, makes its other end not contacted with metallic cavity bottom.
Metal closures connection metal column one side is fixed with the adaptable rubber piston of a size, and gold is realized by rubber piston
Category plug and the good sealing property inside metallic cavity.
Two water injection holes, for injecting liquid into metallic cavity, and the adaptable rubber waterproof plug of size is equipped with, used
When metallic cavity chamber in fill liquid.
Metallic cavity bottom is provided with through hole, and dielectric material is measured by through hole, and is equipped with the adaptable rubber of size
Glue waterproof plug, through hole radius≤0.5mm, due to through hole very little, atmospheric pressure causes the liquid in cavity not leak.Not
Through hole is sealed by rubber stopper during water filling, removes rubber stopper after liquid to be filled.
The liquid is that dielectric constant is higher than air and nonconducting liquid.
In use, first being sealed through hole by rubber stopper, metal closures are slid at the top of metallic cavity, pass through a note
The mouth of a river fills liquid；Then the rubber stopper on metallic cavity bottom through-hole is removed, passes through input/output port connected vector network point
Analyzer observes resonant frequency, then the working frequency for being adjusted to need by resonant frequency by sliding metal plug, now the liquid in cavity
Body excludes from through hole.
Further, the metal column is fixedly connected again with metal closures using integrated manufacture or after manufacturing respectively.
One end of coaxial waveguide is subjected to short circuit and just constitutes coaxial resonant cavity.Because coaxial resonant cavity has short in Z axis
Road surface, so constituting desired electrical wall boundary condition so that the phase constant β of coaxial waveguide in z-direction is discontinuous, passes through electricity
Coupling or magnetic-coupled mode are reflected in the electromagnetic field that cavity underexcitation rises at short-circuit place, therefore introduce a variableMake
Electromagnetic wave is obtained to be distributed in standing wave in z-direction.The condition of resonance of resonator is：
Wherein n=1,2,3 ...,The phase variant that resonator introduces in the Z-axis direction, β is phase constant, and l is
The length of resonator.For the quarter-wave coaxial cavity of this proposition, its one end is short circuit, and the other end is open circuit, so It can obtain：
It can be obtained according to wavelength X and phase constant β relation：
Wherein ε is relative dielectric constant.
Due to this invention be quarter-wave coaxial cavity, so quarter-wave coaxial cavity obtain resonant frequency can
It is expressed as：
The relative dielectric constant of pure water is 81, by coaxial resonant cavity it is theoretical understand relative to air fill four/
One wavelength coaxial resonator, the cavity length of the quarter-wave coaxial resonant cavity of pure water filling is 1/9.This causes several
The cavity length of the quarter-wave coaxial resonant cavity of hundred megahertzs of frequency ranges can be reduced to Centimeter Level.
In summary, the liquid that the present invention passes through the filling high-k in quarter-wave coaxial resonant cavity cavity
Substitute air, and piston structure, realize miniaturization and the frequency-adjustable of quarter-wave coaxial resonant cavity.
Brief description of the drawings
Fig. 1 is the diagrammatic cross-section of embodiment；
Fig. 2 is the upward view of metal closures；
Reference：Metallic cavity -1, metal column -2, through hole -3, metal closures -4, input and output hole -5, rubber piston -6,
Fluid injection body -7, water injection hole -8.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail.
This example is solved by taking 140MHz -270MHz as an example by HFSS simulation softwares, it is determined that a quarter in 140MHz
The parameter of wavelength coaxial resonator.
A kind of adjustable microwave resonator, including metallic cavity -1, metal column -2, through hole -3, metal closures -4, input and output
Hole -5, rubber piston -6, liquid -7 and water injection hole -8.
Metallic cavity 1 is the hollow cylinder of one end open, and the wall thickness of metallic cavity 1 is 2mm, housing depth 55mm,
Cavity internal diameter 12mm.
The diameter of metal closures 4 is adapted with the internal diameter size of metallic cavity 1, is put in inside metallic cavity 1, is passed through rubber piston 6
It is bonded and can slides with metallic cavity inner tight.Metal column 2 is located at the lower section of metal closures 4, and metal closures 4 are integrated with metal column 2
Manufacture, the length 33mm of metal column 2 so that the other end of metal column 2 does not contact with metallic cavity 1.Symmetrically offered on metal closures 4
Input and output hole 5, in actual use, becket or metal probe can be optionally selected to quarter-wave coaxial resonant cavity
Excitation is produced, the bore in input and output hole is consistent with standard sub-miniature A connector bore, and is threaded, and is easy to be connected with sub-miniature A connector.
Two water injection holes 8 are arranged with metal closures, the bore of water injection hole is 3mm.It is adapted on water injection hole 8 equipped with size
Rubber waterproof plug, water filling is being carried out to cavity or rubber waterproof plug is extracted during draining, rubber waterproof plug is filled in into note during work
Water hole.
Metallic cavity 1 is closely connected with metal closures 4 first in quarter-wave coaxial resonant cavity use, selection is closed
Suitable energisation mode, such as becket or metal probe enter row energization in input and output 4 to resonator, due to heterogeneite,
Two port input and output can exchange.Pure water 7 is filled to inside cavity by water filling osculum 7.
Solved by HFSS simulation softwares, when cavity lid is located at cavity the top, quarter-wave coaxial resonant cavity
Main mould frequency be 140MHz, slide downward metal closures, as metal closures slide downward 20mm, the main mould frequency of cavity is
270MHz。
As fully visible, by optimizing, the main mould frequency of the quarter-wave coaxial resonant cavity in this example is 140-
270MHz, cavity total height are less than 55mm.Quarter-wave coaxial resonant cavity of the invention has miniaturization as can be seen here
Feature.
Claims (4)
1. a kind of adjustable microwave resonator, including metallic cavity, liquid and metal closures, it is characterised in that：
The inner chamber size of metal closures and metallic cavity is adapted, and is placed in being formed in the work slided in metallic cavity in metallic cavity
Plug device；
Metal closures are provided with input and delivery outlet, rubber piston, two water injection holes and metal column；
Input is consistent with standard sub-miniature A connector with delivery outlet size, for external sub-miniature A connector；
Metal column and metal closures are an entirety, and as metallic inner conductor, it is shorter in length than the height of metallic cavity, made metal column
Its other end does not contact with metallic cavity bottom；
Metal closures connection metal column one side is fixed with the adaptable rubber piston of a size, and metal closures are realized by rubber piston
With the sealing inside metallic cavity；
Two water injection holes, for injecting liquid into metallic cavity, and it is equipped with the adaptable rubber waterproof plug of size；
Liquid is that dielectric constant is higher than air and nonconducting liquid；
Metallic cavity bottom is provided with through hole, and dielectric material is measured by through hole, through hole radius≤0.5mm, and is equipped with big
Small adaptable rubber waterproof plug.
2. adjustable microwave resonator as claimed in claim 1, it is characterised in that：The overall structure of the metal column and metal closures is adopted
It is fixedly connected again after manufacturing with integration manufacture or respectively.
3. adjustable microwave resonator as claimed in claim 1, it is characterised in that：The liquid is pure water.
4. the application method of adjustable microwave resonator as claimed in claim 1：
Through hole is sealed by rubber stopper first, metal closures are slid at the top of metallic cavity, liquid is filled by a water filling port
Body；Then the rubber stopper on metallic cavity bottom through-hole is removed, is observed by input/output port connected vector Network Analyzer humorous
Vibration frequency, then by sliding metal plug by resonant frequency be adjusted to need working frequency, now the liquid in cavity from through hole arrange
Remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906880.2A CN107706494B (en) | 2017-09-29 | 2017-09-29 | A kind of adjustable microwave resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906880.2A CN107706494B (en) | 2017-09-29 | 2017-09-29 | A kind of adjustable microwave resonant cavity |
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| Publication Number | Publication Date |
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| CN107706494A true CN107706494A (en) | 2018-02-16 |
| CN107706494B CN107706494B (en) | 2019-07-19 |
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| CN201710906880.2A Active CN107706494B (en) | 2017-09-29 | 2017-09-29 | A kind of adjustable microwave resonant cavity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801598A (en) * | 2018-06-27 | 2018-11-13 | 电子科技大学 | Luminous power microwave test device and method based on dyestuff optical sensitization characteristic |
| CN108963399A (en) * | 2018-06-26 | 2018-12-07 | 浙江大学 | A kind of novel tunable high power cavity body filter |
| CN110247142A (en) * | 2019-06-27 | 2019-09-17 | 深圳大学 | Filter |
| CN110779653A (en) * | 2019-10-31 | 2020-02-11 | 金华伏安光电科技有限公司 | Gas pressure detector and system based on optical fiber structure resonant cavity principle |
| CN111537802A (en) * | 2020-05-25 | 2020-08-14 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040246079A1 (en) * | 2003-03-31 | 2004-12-09 | Tdk Corporation | Method and apparatus for measuring complex dielectric constant of dielectric |
| CN1560959A (en) * | 2004-03-09 | 2005-01-05 | 惠州学院 | Special cavity resonator and testing method for mediat resonator material at 8mm band test |
| CN1790040A (en) * | 2005-12-06 | 2006-06-21 | 电子科技大学 | Cylindrical high Q resonant cavity and microwave dielectric complex permittivity test device |
| CN101826649A (en) * | 2010-04-27 | 2010-09-08 | 江苏江佳电子股份有限公司 | Transverse magnetic (TM) mode dielectric resonator |
-
2017
- 2017-09-29 CN CN201710906880.2A patent/CN107706494B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040246079A1 (en) * | 2003-03-31 | 2004-12-09 | Tdk Corporation | Method and apparatus for measuring complex dielectric constant of dielectric |
| CN1560959A (en) * | 2004-03-09 | 2005-01-05 | 惠州学院 | Special cavity resonator and testing method for mediat resonator material at 8mm band test |
| CN1790040A (en) * | 2005-12-06 | 2006-06-21 | 电子科技大学 | Cylindrical high Q resonant cavity and microwave dielectric complex permittivity test device |
| CN101826649A (en) * | 2010-04-27 | 2010-09-08 | 江苏江佳电子股份有限公司 | Transverse magnetic (TM) mode dielectric resonator |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963399A (en) * | 2018-06-26 | 2018-12-07 | 浙江大学 | A kind of novel tunable high power cavity body filter |
| CN108963399B (en) * | 2018-06-26 | 2019-12-24 | 浙江大学 | Novel tunable high-power cavity filter |
| CN108801598A (en) * | 2018-06-27 | 2018-11-13 | 电子科技大学 | Luminous power microwave test device and method based on dyestuff optical sensitization characteristic |
| CN110247142A (en) * | 2019-06-27 | 2019-09-17 | 深圳大学 | Filter |
| CN110247142B (en) * | 2019-06-27 | 2021-05-18 | 深圳大学 | Filter |
| CN110779653A (en) * | 2019-10-31 | 2020-02-11 | 金华伏安光电科技有限公司 | Gas pressure detector and system based on optical fiber structure resonant cavity principle |
| CN110779653B (en) * | 2019-10-31 | 2021-08-24 | 杭州翔毅科技有限公司 | Gas pressure detector and system based on optical fiber structure resonant cavity principle |
| CN111537802A (en) * | 2020-05-25 | 2020-08-14 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
| CN111537802B (en) * | 2020-05-25 | 2021-05-28 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
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| Publication number | Publication date |
|---|---|
| CN107706494B (en) | 2019-07-19 |
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