CN106953149B - Microwave isolator based on ferrite magnetic linkage - Google Patents
Microwave isolator based on ferrite magnetic linkage Download PDFInfo
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- CN106953149B CN106953149B CN201710236697.6A CN201710236697A CN106953149B CN 106953149 B CN106953149 B CN 106953149B CN 201710236697 A CN201710236697 A CN 201710236697A CN 106953149 B CN106953149 B CN 106953149B
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- ferrite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/36—Isolators
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Abstract
The invention discloses a kind of microwave isolators based on ferrite magnetic linkage, including several soft magnetic ferrite columns, and it is covered in the upper metal plate and lower metal plate of soft magnetic ferrite column upper and lower surface, several soft magnetic ferrite columns form an orthogonal array, orthogonal array is made of the first linear array and the second linear array, two groups of linear arrays connect in end, between at 90 degree of angles；Two groups of linear arrays are placed in air environment, additional axialy offset magnetic field, and magnetic direction added by two groups of linear arrays is opposite.Microwave isolator of the invention has filter with low insertion loss, the high advantage of isolation, and has that structure is simple, and handling ease is low in cost, it is easy to accomplish the advantage integrated with planar microwave circuit.
Description
Technical field
The present invention relates to a kind of microwave isolator, specifically a kind of ferrite microwave isolator, more specifically one kind is based on
The microwave isolator of ferrite magnetic linkage.
Background technique
In a communications system, in order to guarantee the stability of signal source, signal is reflected when needing to reduce signal transmission to signal
The interference in source, wherein the isolator of high-isolation plays a very important role.Between two stage power device, it is high performance every
It is even more essential device from device.In recent years, with the development of microwave communication techniques, performance, volume to microwave isolator,
Especially more stringent requirements are proposed for Planar integration ability.The isolator of microwave section generallys use metal waveguide load ferrite material
To constitute, although being resistant to higher microwave power, structure is typically complex material, is not easy to the collection of planar microwave circuit
At not being able to satisfy requirement integrated to device in present microwave communication application.
Summary of the invention
Goal of the invention: it is directed to the above-mentioned problems of the prior art and deficiency, the object of the present invention is to provide a kind of structures
Simply, it is easily achieved, the convenient high performance microwave isolator integrated with planar circuit.
Technical solution: for achieving the above object, the technical solution adopted by the present invention are as follows:
A kind of microwave isolator based on ferrite magnetic linkage, including several soft magnetic ferrite columns, and it is covered in soft magnet
The upper metal plate of oxysome column upper and lower surface and lower metal plate, several soft magnetic ferrite columns form an orthogonal array, orthogonal array
Be made of the first linear array and the second linear array, two groups of linear arrays connect in end, between at 90 degree of angles；Two groups of linear arrays
It is placed in air environment, additional axialy offset magnetic field, magnetic direction added by two groups of linear arrays is opposite；First linear array and the second line
The angular bisector direction of array is parallel with electromagnetic wave incident direction.
Further, lower metal plate offers through-hole at soft magnetic ferrite column opposite position, and it is soft for being equipped in through-hole
The permanent-magnet ferrite column in magnetic iron oxide scapus offer axialy offset magnetic field.
Further, the material of soft magnetic ferrite column is yttrium iron garnet ferrite, magnesium Mn ferrite or nickel-zinc ferrite.
Further, the material of permanent-magnet ferrite is strontium ferrite or barium ferrite.
Further, soft magnetic ferrite column is cylindrical shape.
Further, permanent-magnet ferrite column is cylindrical shape.
Working principle: sub-wavelength resonance plays key player in manual electromagnetic structure, can be with using sub-wavelength resonance
Desired effective dielectric constant and magnetic conductivity are obtained, the phenomenon of many novelties is generated.For dielectric cylinder linear array, when plane electricity
When magnetic wave is incident on dielectric cylinder array (direction of an electric field along cylinder axial direction), when resonance each dielectric cylinder scattered field in space
Phase Stacking or counteracting, the diffraction coefficient of cylinder linear array difference rank is had an impact, when between cylinder interval meet
When certain condition, the negative sense deflection of electromagnetic wave may be implemented.And when cylinder is made of Ferrite Material, due to the magnetic conductance of material
There are the non-master diagonal element of non-zero, the nonreciprocal controls easy to accomplish to electromagnetic wave for rate tensor.Consider such ferrite circle
The negative sense deflection of electromagnetic wave may be implemented when externally-applied magnetic field is along cylinder axial direction in column linear array, and when externally-applied magnetic field direction inverts
When, electromagnetic wave can be totally reflected, and the ferrite cylinder linear array under two kinds of bias states is mutually perpendicular to place, utilizes iron oxygen
The one-way transmission of electromagnetic wave may be implemented in this non-electromagnetic propagation phenomenon that appears alternatively of body cylinder linear array, constructs isolator.
The utility model has the advantages that the present invention proposes a kind of to be embedded in mutually orthogonal ferrite column linear array in parallel-plate waveguide system
Microwave isolator.This isolator has filter with low insertion loss, the high advantage of isolation, and structure is simple, handling ease, at low cost
It is honest and clean, it is easy to accomplish integrated with planar microwave circuit.Size by changing externally-applied magnetic field can be designed that the micro- of different frequency range
Isolator.
Detailed description of the invention
Fig. 1 is three-dimensional structure diagram of the invention.
In Fig. 1,1: soft magnetic ferrite cylinder, metal plate on 2,3: lower metal plate, 4: permanent-magnet ferrite cylinder.
Fig. 2 is structural parameters schematic diagram of the invention.
Fig. 3 is operation principle schematic diagram of the present invention.
Fig. 4 is S parameter simulation result diagram of the present invention when impressed field is 800Oe.
Fig. 5 is S parameter simulation result diagram of the present invention when impressed field is 700Oe and 850Oe.
Specific embodiment
Structure Figure and specific embodiment below, the present invention is furture elucidated, it should be understood that these examples are merely to illustrate this
It invents rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention various
The modification of equivalent form falls within the application range as defined in the appended claims.
Fig. 1 shows the three-dimensional structure of microwave isolator of the present invention.One kind that this example provides is based on iron
The microwave isolator of oxysome magnetic linkage.The two groups of magnetism of composition of soft magnetic ferrite cylinder 1 are single-stranded, including the first linear array and the second linear array
Column, two linear arrays connect in end, between at 90 degree of angles, constitute a kind of orthogonal array.Soft magnetic ferrite can be with
Using yttrium iron garnet ferrite, magnesium Mn ferrite or nickel-zinc ferrite.Cylinder upper and lower surface is equipped with conductive metal layer (i.e. up and down
Metal plate 2,3) constitutes parallel-plate waveguide system, generally metallic aluminium.In 1 corresponding positions of soft magnetic ferrite cylinder on lower metal plate 3
It is equipped with through-hole, provides the permanent-magnet ferrite cylinder 4 of bias-field for placing, material uses strontium ferrite or barium ferrite.
Fig. 2 shows the two-dimensional structure parameter schematic diagrames of the embodiment of emulation testing of the present invention.In the present embodiment, soft magnetism
Ferrite cylinder linear array is placed under air background, soft magnetic ferrite cylindrical radius r=5mm, array lattice constant d=
20.5mm, two cylinder of corner is apartYttrium iron garnet ferrite saturation magnetization 4* π * Ms=
1884Gauss, relative dielectric constant ε=15.26.Externally-applied magnetic field size added by array is 800Oe, and the first linear array (1) is added
Inwards, the vertical paper of magnetic direction added by the second linear array (2) is outside for the vertical paper of magnetic direction.
Fig. 3 a-c shows schematic illustration used in the present invention.It is additional added by axial direction for ferrite cylinder array
The direction in magnetic field and the angle change of electromagnetic wave incident can all have an impact its diffraction characteristic, generate nonreciprocal electromagnetic propagation
Phenomenon.Such as Fig. 3 (a), when the vertical paper of externally-applied magnetic field is outside, when plane wave is with 45 degree of angle incidence, can almost be totally reflected, with-
When 45° angle incidence, then it can be emitted along negative refraction direction；When the vertical paper of externally-applied magnetic field is inside, plane wave is with 45° angle incidence
When, it can be emitted along negative refraction direction, and when with -45° angle incidence, it can be reflected.Such as Fig. 3 (b), (c), when two column ferrite cylinders
When the mutually orthogonal placement of linear array, when plane wave is along orthogonal array inner interweaver propagated forward, plane wave successively by reflection,
Two step of negative refraction can be by ferrite array, and when plane wave backpropagation, and electromagnetic wave will be directly reflected, and cannot be passed through
Ferrite array, reverse isolation before being formed.
The S parameter simulation result of microwave isolator when Fig. 4 shows externally-applied magnetic field 800Oe.Simulation result shows isolator
Centre frequency 8.95GHz, preceding reverse transfer difference -35dB, insertion loss is less than 4dB, this isolator is with good forward direction biography
Defeated and reverse isolation characteristic.
It is 700Oe that Fig. 5, which shows externally-applied magnetic field, the S parameter simulation result of microwave isolator when 850Oe.Externally-applied magnetic field is
When 700Oe, isolator centre frequency is 8.81GHz, and preceding reverse transfer difference -40dB, insertion loss is less than 4dB；Externally-applied magnetic field
When for 850Oe, isolator centre frequency is 9.05GHz, preceding reverse transfer difference -35dB, and insertion loss is less than 4dB.Therefore, may be used
To pass through the size for changing added permanent-magnet ferrite Surface field, to meet the isolator design demand of different frequency.
Claims (6)
1. a kind of microwave isolator based on ferrite magnetic linkage, it is characterised in that: including several soft magnetic ferrite columns, and covering
In the upper metal plate and lower metal plate of soft magnetic ferrite column upper and lower surface, several soft magnetic ferrite columns form a right angle battle array
Column, the orthogonal array is made of the first linear array and the second linear array, and two groups of linear arrays connect in end, between at 90 degree
Angle；Two groups of linear arrays are placed in air environment, additional axialy offset magnetic field, and magnetic direction added by two groups of linear arrays is opposite；The
One linear array and the angular bisector direction of the second linear array are parallel with electromagnetic wave incident direction.
2. microwave isolator according to claim 1, it is characterised in that: the lower metal plate is opposite in soft magnetic ferrite column
It answers and offers through-hole at position, be equipped in the through-hole and provide the permanent-magnet ferrite in axialy offset magnetic field for soft magnetic ferrite column
Column.
3. microwave isolator according to claim 1, which is characterized in that the material of the soft magnetic ferrite column is yttrium iron stone
Garnet ferrite, magnesium Mn ferrite or nickel-zinc ferrite.
4. microwave isolator according to claim 2, which is characterized in that the material of the permanent-magnet ferrite is strontium ferrite
Or barium ferrite.
5. microwave isolator according to claim 1, which is characterized in that the soft magnetic ferrite column is cylindrical shape.
6. microwave isolator according to claim 2, which is characterized in that the permanent-magnet ferrite column is cylindrical shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710236697.6A CN106953149B (en) | 2017-04-12 | 2017-04-12 | Microwave isolator based on ferrite magnetic linkage |
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| CN201710236697.6A CN106953149B (en) | 2017-04-12 | 2017-04-12 | Microwave isolator based on ferrite magnetic linkage |
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| CN106953149B true CN106953149B (en) | 2019-06-11 |
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| CN108598652B (en) * | 2018-07-02 | 2023-10-24 | 南京工业职业技术学院 | Microwave power distributor based on magnetic surface plasmon |
| CN114566777B (en) * | 2022-01-13 | 2024-02-23 | 东南大学 | Artificial SPP electromagnetic device for nonreciprocal signal routing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006145726A (en) * | 2004-11-18 | 2006-06-08 | Murata Mfg Co Ltd | Electromagnetic wave direction control element |
| CN105846115A (en) * | 2016-04-07 | 2016-08-10 | 南京大学 | Pattern-reconfigurable directional radiation antenna |
| CN106129563A (en) * | 2016-07-08 | 2016-11-16 | 中国人民解放军空军工程大学 | A kind of based on WAVEGUIDE LOADED ferritic adjustable microwave isolator |
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| US9543627B2 (en) * | 2013-11-19 | 2017-01-10 | Electronics And Telecommunications Research Institute | Microwave device using magnetic material nano wire array and manufacturing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006145726A (en) * | 2004-11-18 | 2006-06-08 | Murata Mfg Co Ltd | Electromagnetic wave direction control element |
| CN105846115A (en) * | 2016-04-07 | 2016-08-10 | 南京大学 | Pattern-reconfigurable directional radiation antenna |
| CN106129563A (en) * | 2016-07-08 | 2016-11-16 | 中国人民解放军空军工程大学 | A kind of based on WAVEGUIDE LOADED ferritic adjustable microwave isolator |
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