CN108400413A - One kind being based on ferritic adjustable microwave isolator - Google Patents
One kind being based on ferritic adjustable microwave isolator Download PDFInfo
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- CN108400413A CN108400413A CN201810168596.4A CN201810168596A CN108400413A CN 108400413 A CN108400413 A CN 108400413A CN 201810168596 A CN201810168596 A CN 201810168596A CN 108400413 A CN108400413 A CN 108400413A
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- China
- Prior art keywords
- tablet
- ferrite
- isolator
- ferritic
- cavity
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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
- H01P1/32—Non-reciprocal transmission devices
- H01P1/36—Isolators
Abstract
The invention discloses one kind being based on ferritic adjustable microwave isolator, including a ferrite tablet, Jiong type frame is provided on the ferrite tablet, a cavity is formed between the Jiong type frame and the tablet, the lateral surface of the tablet is provided with bias magnetic field, the magnetic line of force that the bias magnetic field generates is from tablet side vertical incidence or outgoing；Both sides are provided with isolator port right over the tablet.Ferrite plate material is under the action of the bias magnetic field of side, pass through the coupling with electromagnetic wave, excite magnetic surface plasmon, it is formed in existing unidirectional electromagnetic boundary state in wider frequency range in ferrite planar surface, therefore the isolator provides different responses to the electromagnetic wave of different directions incidence, shows as conducting and blocking characteristics respectively.The isolator of the present invention has simple in structure, the characteristics such as is easily integrated, while also having good heat dissipation, the advantages such as of low cost, isolation is high, working frequency range is wide.
Description
Technical field
The invention belongs to microwave device technology fields, more particularly to one kind being based on ferritic adjustable microwave isolator.
Background technology
With the development of the technologies such as microwave communication, Broadcast and TV system and electronic countermeasure, to the need of all kinds of Microwave Iron Oxide Elements
The amount of asking is more and more big, but the requirement simultaneously to the index performance of Microwave Iron Oxide Elements is also more and more high, size requires more and more
Small, power requirement is more and more big etc., and the requirement of modern system cannot have been met with traditional mentality of designing.
Traditional ferrite isolator, such as resonance isolator, field displacement isolator, structure is more complex, and isolation is not high, frequency
With narrow, therefore use scope is restricted.Currently used ferrite isolator is a kind of realization microwave signal one way propagation
Nonreciprocal Two-port netwerk microwave passive component, it allows electromagnetic wave from a port one-way transmission to another port, and very little is lost；
However electromagnetic wave cannot pass through when reverse transfer, isolation is not high enough.Appeal problem, it would be highly desirable to solve.
Invention content
It is isolated based on ferritic adjustable microwave in view of the deficienciess of the prior art, it is an object of the present invention to provide one kind
Device, to solve the problems mentioned in the above background technology, reasonable design have good heat dissipation, and of low cost, isolation height etc. is excellent
Point.
To achieve the goals above, the present invention is to realize by the following technical solutions：One kind based on it is ferritic can
Microwave isolator, including a tablet are adjusted, Jiong type frame is provided on the tablet, is formed between the Jiong type frame and the tablet
One cavity is provided with bias magnetic field in the lateral surface of the tablet, and the magnetic line of force that the bias magnetic field generates is from the flat sides
Face vertical incidence or outgoing；Both sides are symmetrical arranged there are two isolator port right over the tablet, and isolator port is located at
Immediately below section, ferrite tablet is close on the downside of isolator port, isolator port sizes size depends on input signal source
Size.
Preferably, the tablet is ferrite tablet.
Preferably, the cavity is metal cavity or surface is provided with the coat of metal in the cavity.
Preferably, medium is filled in the cavity, between the relative dielectric constant of dielectric material is 1 ~ 4.6.
Preferably, the bias magnetic field is is provided by the permanent magnet being arranged in the side of the tablet.
Preferably, the tablet is cuboid, and length is more than a quarter operation wavelength.
Preferably, the cross-sectional width of the cavity formed between the Jiong type frame and the tablet is 3 millimeters ~ 30 millis
Rice, is highly 0.5 centimetre ~ 5 centimetres.
Preferably, the material of the ferrite tablet is yttrium iron garnet ferrite, magnesium Mn ferrite, MnZn iron
At least one of oxysome and nickel-zinc ferrite.
Preferably, the material of the cavity can be copper, aluminium, stainless steel or aluminium alloy, and the coat of metal is by covering
The structural material of copper is made.
The beneficial effects of the invention are as follows：
1. microwave isolator proposed by the present invention, low to applied field strengths requirement, isolation is high, is easily integrated；
2. design simple in structure is conducive to the heat dissipation of device, and then reduces influence of the isolator fuel factor to device working effect；
3. can realize that working frequency range can under conditions of isolator shape is constant by the size of change externally-applied magnetic field
It adjusts；
4. by changing magnetic direction, the direction of conducting and blocking can be reversed, power and energy is flexible, before having application well
Scape.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the schematic cross-section of the embodiment of the present invention 1；
Fig. 3 is the schematic cross-section of the embodiment of the present invention 2；
Fig. 4 is the schematic cross-section of the embodiment of the present invention 3；
Fig. 5 is S parameter simulation curve of the isolator when applied bias magnetic field size is 400 Gauss；
Fig. 6 is S parameter simulation curve of the isolator when applied bias magnetic field size is 600 Gauss；
Fig. 7 is S parameter simulation curve of the isolator when applied bias magnetic field size is 900 Gauss.
In figure：1- tablets；2- Jiong type frames；3- cavitys；The constant permanent magnets of 4-；The 5- coats of metal；6- isolators port.
Specific implementation mode
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Embodiment 1：Shown in referring to Fig. 1 and Fig. 2, one kind being based on ferritic adjustable microwave isolator, including a ferrite
The length of tablet 1, ferrite tablet 1 is more than a quarter operation wavelength, is provided with by made of metal on the ferrite tablet 1
At Jiong type frame 2, a cavity 3 is formed between the Jiong type frame 2 and the ferrite tablet 1, in the outer of the ferrite tablet 1
Side is provided with bias magnetic field, and the bias magnetic field is the constant permanent magnet 4 being arranged in the both sides of the tablet, adjacent pole pole
Property on the contrary, i.e. one side magnetic pole be the poles S, another side be the poles N or one side magnetic pole be the poles N, another side be the poles S, bias magnetic field generation
The magnetic line of force from tablet side vertical incidence or outgoing；1 surface both sides of the ferrite tablet be symmetrically arranged with every
From device port 6.
It is further preferred that the ferrite tablet 1 and Jiong type frame 2 constitute wave guide wall, the material of the ferrite tablet 1
For one kind of yttrium iron garnet ferrite, magnesium Mn ferrite, manganese-zinc ferrite or nickel-zinc ferrite, preferably yttrium iron garnet iron
Oxysome, the Oe of saturation magnetization 4Ms=1780, relative dielectric constant 15, the Oe of Delta H=178.Design waveguide port width
It it is highly 2 centimetres for W=4 millimeter.
With reference to Fig. 5, when applied bias magnetic field size is 400 Gauss, S parameter simulation curve such as Fig. 5 of the invention is shown
The good reverse isolation characteristic in wider frequency section.
When different applied bias magnetic fields are shown respectively in Fig. 6 and Fig. 7, the drift situation of working frequency range in the present embodiment.Such as Fig. 6
Shown in Fig. 7, when applied bias magnetic field size is from when 600 Gausses increase to 900 Gauss in Fig. 7 in Fig. 6, the work of microwave isolator
Make frequency range obviously to drift about to high frequency, shows good working frequency range tunable characteristic.It is worth noting that, working as applied bias magnetic field
When even variation, the working frequency range of isolator also changes proportionally, and different operating frequency range can be easier designed by calculating
The waveguide isolator of demand.
The operation principle of the present invention is to introduce unidirectional electromagnetic boundary state in the waveguide, and it is adjustable to have devised a kind of working frequency range
The microwave isolator of section.Ferrite tablet is flat in ferrite by the coupling with electromagnetic wave under the action of applied bias magnetic field
Plate surface excites magnetic surface plasmon, to form unidirectional electromagnetic boundary state, selects the forbidden band model in Ferrite Material
The interior working frequency for finding unidirectional boundary state is enclosed, there can be good binding effect to unidirectional mode.The isolator is to not Tongfang
Different responses is provided to incident electromagnetic wave, shows as conducting and blocking characteristics respectively.The size for changing bias magnetic field, can be with
Make magnetic surface plasmon resonance frequency shifts, to adjust the work frequency of isolator under conditions of not changing shape
Section realizes frequency tunable characteristic.Since the spacer structures have symmetry, by the magnetic direction for reversing permanent magnetic iron
The direction that conducting may be reversed and block.
Embodiment 2：Referring to Fig. 1, Fig. 3, Fig. 5 to Fig. 7, one kind being based on ferritic adjustable microwave isolator, including an iron
The length of oxysome tablet 1, ferrite tablet 1 is more than a quarter operation wavelength, and Jiong type is provided on the ferrite tablet 1
Frame 2,2 inner surface of Jiong type frame is provided with is made the coat of metal 5 by the structural material for covering copper；In the ferrite tablet 1
Be filled with dielectric material in the cavity 3 that is formed between the Jiong type frame 2, the relative dielectric constant of dielectric material be 1 ~ 4.6 it
Between；The ferrite tablet 1 and 2 frame of Jiong type constitute wave guide wall, and design waveguide port width is W=3 millimeter, is highly 0.5 li
Rice, other technical characteristics are the same as embodiment 1.
Embodiment 3：Referring to Fig. 4, Fig. 5 to Fig. 7, one kind being based on ferritic adjustable microwave isolator, including a ferrite
The length of tablet 1, ferrite tablet 1 is more than a quarter operation wavelength, and Jiong type frame 2 is provided on the ferrite tablet 1,
A cavity is formed between the Jiong type frame 2 and the ferrite tablet 1, is provided with partially in the lateral surface of the ferrite tablet 1
Magnetic field is set, the bias magnetic field is the constant permanent magnet 4 being arranged in the side of the ferrite tablet 1, what bias magnetic field generated
The magnetic line of force is from tablet side vertical incidence or outgoing, and other technical characteristics are the same as embodiment 1.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (9)
1. one kind being based on ferritic adjustable microwave isolator, it is characterised in that：Including a tablet（1）, in the tablet（1）On
It is provided with Jiong type frame（2）, the Jiong type frame（2）With the tablet（1）Between form a cavity（3）, in the tablet（1）It is outer
Side is provided with bias magnetic field, and the magnetic line of force that the bias magnetic field generates is from the tablet（1）Side vertical incidence or outgoing；
The tablet（1）Surface both sides are symmetrically arranged with isolator port（6）.
2. according to claim 1 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：The tablet
（1）For ferrite tablet.
3. according to claim 2 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：The cavity
（3）Surface is provided with the coat of metal for metal cavity or in the cavity（5）.
4. according to claim 3 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：The cavity
（3）It is interior to be filled with medium.
5. according to claim 3 or 4 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：It is described inclined
It is in the tablet to set magnetic field（1）Side or both sides setting constant permanent magnet（4）.
6. according to claim 3 or 4 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：It is described flat
Plate（1）For cuboid, length is more than a quarter operation wavelength.
7. according to claim 3 or 4 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：The Jiong
Type frame（2）With the tablet（1）Between the cross-sectional width of cavity that is formed be 3 millimeters ~ 30 millimeters, be highly 0.5 centimetre ~ 5 lis
Rice.
8. according to claim 3 or 4 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：Described
The material of ferrite tablet be in yttrium iron garnet ferrite, magnesium Mn ferrite, manganese-zinc ferrite and nickel-zinc ferrite at least
It is a kind of.
9. according to claim 8 a kind of based on ferritic adjustable microwave isolator, it is characterised in that：The cavity
（3）Material can be copper, aluminium, stainless steel or aluminium alloy, the coat of metal is made of the structural material for covering copper.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711110379 | 2017-11-12 | ||
| CN2017111103791 | 2017-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108400413A true CN108400413A (en) | 2018-08-14 |
Family
ID=63095373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810168596.4A Pending CN108400413A (en) | 2017-11-12 | 2018-02-28 | One kind being based on ferritic adjustable microwave isolator |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1028705A (en) * | 1963-04-11 | 1966-05-04 | Erik Ljung | Non-reciprocal wave-guide |
| CN2117653U (en) * | 1992-02-26 | 1992-09-30 | 华东工学院 | Waveguide field displacement isolators |
| CN104577281A (en) * | 2015-01-21 | 2015-04-29 | 南京大学 | Microwave isolator based on substrate integration waveguide loaded with ferrite |
| 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 |
-
2018
- 2018-02-28 CN CN201810168596.4A patent/CN108400413A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1028705A (en) * | 1963-04-11 | 1966-05-04 | Erik Ljung | Non-reciprocal wave-guide |
| CN2117653U (en) * | 1992-02-26 | 1992-09-30 | 华东工学院 | Waveguide field displacement isolators |
| CN104577281A (en) * | 2015-01-21 | 2015-04-29 | 南京大学 | Microwave isolator based on substrate integration waveguide loaded with ferrite |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| ZAIHE YU 等: ""One-way Electromagnetic Mode at the surface of a Magnetized Gyromagnetic Medium"", 《ELECTRON. MATER. LETT.》 * |
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Application publication date: 20180814 |
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| RJ01 | Rejection of invention patent application after publication |