CN108306085A - Upper and lower composite structure microstrip circulator - Google Patents
Upper and lower composite structure microstrip circulator Download PDFInfo
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- CN108306085A CN108306085A CN201810093628.9A CN201810093628A CN108306085A CN 108306085 A CN108306085 A CN 108306085A CN 201810093628 A CN201810093628 A CN 201810093628A CN 108306085 A CN108306085 A CN 108306085A
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- magnetic moment
- ferrite substrate
- circulator
- bottom plate
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- 239000002131 composite material Substances 0.000 title claims abstract description 10
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 67
- 239000000758 substrate Substances 0.000 claims abstract description 58
- 230000005415 magnetization Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 abstract description 8
- 238000010606 normalization Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- H01P1/38—Circulators
- H01P1/383—Junction circulators, e.g. Y-circulators
- H01P1/387—Strip line circulators
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- Non-Reversible Transmitting Devices (AREA)
Abstract
The invention discloses a kind of composite structure microstrip circulators up and down, belong to microwave device field, include permanent magnet successively from top to bottom（5）, dieelctric sheet（4）And bottom plate（2）, it is characterised in that：The dieelctric sheet（4）And bottom plate（2）Between be provided with low magnetic moment ferrite substrate（10）, the low magnetic moment ferrite substrate（10）Microstrip circuit is arranged in upper surface（3）, the bottom plate（2）On be embedded with high magnetic moment ferrite substrate（11）, the high magnetic moment ferrite substrate（11）With low magnetic moment ferrite substrate（10）It is adjacent；The present invention effectively reduces the low field loss that high magnetic moment Ferrite Material unsaturation magnetic band comes, and improves the normalization magnetic moment P of microstrip circulator, has expanded the bandwidth of operation of circulator, bandwidth of operation is 7GHz 13GHz, the dB of transmission loss≤0.4, port standing wave≤1.4, isolation >=15.
Description
Technical field
The present invention relates to microwave device field more particularly to a kind of composite structure microstrip circulators up and down.
Background technology
Circulator is a kind of important basic device in microwave engineering, be widely used in civil telecommunications, microwave measurement,
In the various civilian, military equipments such as radar, communication, electronic countermeasure, aerospace.Circulator is mainly used to realize day in a device
Line transmit-receive sharing, the problems such as isolation between grade.Micro-strip circulator due to its is small, light-weight, be easily integrated the characteristics of, in the present age
There is considerable status in radar communication System Development, current maximum application is mainly active phased array T/R module, with
The development of Connectors for Active Phased Array Radar, wider to frequency band, power capacity bigger microstrip circulator have urgent need.
Traditional micro-strip circulator is as shown in Figure 1, using Ferrite Material as micro-strip substrate, that is, ferrite substrate 1, by splashing
Jet device makes 1 upper and lower surface of ferrite substrate metallize, and upper surface is microstrip circuit, and lower surface is ground, lower surface and bottom plate into
Row welding, bottom plate form total with ferrite lower surface.Ferrite substrate 1 realizes the ring of signal under the magnetization of permanent magnet
Row transmission：Port A7 is transmitted to port B8, and port B8 is transmitted to port C9, and port C9 is transmitted to port A7.
The effect of 1 dieelctric sheet 4 is to adjust magnetic field intensity and reduce influence of the permanent magnet to the microstrip circuit that goes in ring in figure, is compensated
The effect of piece 6 is the performance parameter adjusted at a temperature of circulator.
Its technical problem of traditional power divider and defect major embodiment are in the following areas：
1. for the micro-strip circulator under low field operating mode, the direct shadow of selection of gyromagnetic ferrite substrate saturation magnetization
Ring circulator bandwidth of operation.
Relationship following formula of the saturation magnetization 4πms of gyromagnetic ferrite material with working frequency f：
4 π Ms=P2 π f/ γ
γ is the gyromagnetic ratio of electron spin, is equal to 2.21 × 105rad·m/(S·A)
P is normalization saturation magnetic moment, and dimensionless, low field operating mode, the general value ranges of P are 0.3~0.7；
P values are bigger in value range, and the achievable bandwidth of circulator is wider.That is the ferrite substrate of high magnetic moment is used
Broadband to realizing device is beneficial.
According to the transmission theory of microstrip circulator, it is only necessary to after the ferrite saturated magnetization below microstrip circuit centre junction,
Realization that can be optimal is gone in ring performance, and the ferrite substrate other than centre junction is intended only as micro-strip substrate medium, after magnetization
The performance for being not easy to device instead is realized.
But in actual product work, substrate, externally-applied magnetic field can not possibly be accurately right as a whole for ferrite substrate
Its centre junction region carries out saturated magnetization, and misaligns the ferrite other than hearty cord and magnetized.Centre junction is with exterior domain iron oxygen
What the unsaturated magnetic band of body substrate came
Low field loss directly affects the bandwidth of operation of product, and especially when normalization magnetic moment P values are bigger, material selection saturated magnetization is strong
Degree is higher, and the low field loss brought is bigger.
Traditional microstrip circulator structure, can not be by using the ferrite of high saturation and magnetic intensity due to the limitation of structure
Material expands bandwidth.Bandwidth can only realize 40% or so, such as 8GHz-12GHz micro-strip circulators.
Invention content
The purpose of the present invention, which is that, provides a kind of composite structure microstrip circulator up and down, to solve the above problems.
To achieve the goals above, the technical solution adopted by the present invention is such：A kind of composite structure micro-strip up and down is belt
Device includes successively from top to bottom permanent magnet, dieelctric sheet and bottom plate, low magnetic moment ferrite is provided between the dieelctric sheet and bottom plate
Substrate, the low magnetic moment ferrite substrate upper surface are arranged microstrip circuit, high magnetic moment ferrite substrate are embedded on the bottom plate,
The high magnetic moment ferrite substrate is adjacent with low magnetic moment ferrite substrate.
The present invention passes through heart grooving in the soleplate, the ferrite substrate of embedded high magnetic moment, the low magnetic moment ferrite in bottom plate top
Substrate carries out welding with bottom plate and is allowed to be formed combined type ferrite substrate structure up and down；The applied bias that permanent magnet is constituted with bottom plate
Magnetic field can carry out good magnetization to the ferrite substrate of high magnetic moment；By the above-mentioned means, the present invention effectively reduces height
The low field loss that magnetic moment Ferrite Material unsaturation magnetic band comes, normalization magnetic moment P, the P value for improving microstrip circulator can be with
It is increased to 0.5 or more, has expanded the bandwidth of operation of circulator.
As preferred technical solution：The saturation magnetization of the low magnetic moment ferrite substrate is 1800Gauss.
As preferred technical solution：The saturation magnetization of the high magnetic moment ferrite substrate is 2500Gauss.
Using the low magnetic moment ferrite substrate and high magnetic moment ferrite substrate of above-mentioned saturation magnetization, product P value energy
Reach 0.7.
As elucidated before, ferrite substrate saturation magnetization, which belongs to high magnetic moment ferrite or low magnetic moment ferrite, is
It is corresponding with its working frequency.According to the saturation magnetization 4πms of gyromagnetic ferrite material with working frequency f relationship such as
Lower formula：
4 π Ms=P2 π f/ γ
γ is the gyromagnetic ratio of electron spin, is equal to 2.21 × 105rad·m/(S·A)
P is normalization saturation magnetic moment, and dimensionless, low field operating mode, the general value ranges of P are 0.3~0.7；
In this field, the general value for working as P is considered as the ferrite of low magnetic moment less than 0.5, when the value of P is considered as higher than 0.5
The ferrite of high magnetic moment.For low field device, P values are smaller, and circulator bandwidth of operation is narrower, but smaller with internal loss；P values are got over
Greatly, circulator bandwidth of operation is wider, and band internal loss is relatively large.（Magnetic moment=saturation magnetization）
Traditional low field circulator, P values get 0.5 hereinafter, bandwidth 40% can only be realized, if P values are got in traditional structure
0.5 or more, the low field loss that the ferritic unsaturated magnetic band of high magnetic moment comes directly deteriorates bandwidth of a device so that bandwidth of a device is not
It can effectively expand.
The present invention innovatively proposes the compound high magnetic moment circular ferrite substrate below low magnetic moment ferrite substrate, normalization
Saturation magnetic moment P gets 0.5 or more, and applied bias magnetic field energy carries out fully saturated magnetic to the high magnetic moment circular ferrite substrate of rule
Change, has prevented the generation of low field loss, proved by performance simulation and product test, which can effectively expand device band
It is wide.
Compared with the prior art, the advantages of the present invention are as follows：The present invention passes through insertion on the basis of conventional microstrip circulator
Mode compound high magnetic moment below ferrite substrate ferrite substrate, high magnetic moment ferrite substrate concentrates under centre junction
Side, applied bias magnetic field energy uniformly carry out saturated magnetization to high magnetic moment ferrite substrate, significantly reduce high magnetic moment iron oxygen
The low field loss that body material unsaturation magnetic band comes, the dB of transmission loss≤0.4, improves the normalization magnetic moment of microstrip circulator
P has expanded the bandwidth of operation of circulator, bandwidth of operation 7GHz-13GHz, port standing wave≤1.4, isolation >=15, realization micro-strip
The Broadband Matching of circulator.
Description of the drawings
Fig. 1 is the structural schematic diagram of the prior art of the present invention；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention；
Fig. 3 is that simulation result diagram is lost in the circulator of the embodiment of the present invention；
Fig. 4 is that simulation result diagram is isolated in the circulator of the embodiment of the present invention；
Fig. 5 is the circulator standing wave simulation result diagram of the embodiment of the present invention.
In figure：1, ferrite substrate；2, bottom plate；3, microstrip circuit；4, dieelctric sheet；5, permanent magnet；6, compensating plate；7, port
A；8, port B；9, port C；10, low magnetic moment ferrite substrate；11, high magnetic moment ferrite substrate.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings.
Embodiment：
Referring to Fig. 2, a kind of composite structure microstrip circulator up and down includes permanent magnet 5, dieelctric sheet 4 and bottom successively from top to bottom
Plate 2, is provided with low magnetic moment ferrite substrate 10 between the dieelctric sheet 4 and bottom plate 2, the low magnetic moment ferrite substrate 10 is satisfied
It is 1800Gauss with the intensity of magnetization, low 10 upper surface of magnetic moment ferrite substrate is arranged microstrip circuit 3, embedding on the bottom plate 2
Equipped with high magnetic moment ferrite substrate 11, the saturation magnetization of the high magnetic moment ferrite substrate 11 is 2500Gauss, the height
Magnetic moment ferrite substrate 11 is adjacent with low magnetic moment ferrite substrate 10；
The present embodiment passes through in 2 center grooving of bottom plate, embedded high magnetic moment ferrite substrate 11, the low magnetic moment ferrite in 2 top of bottom plate
Substrate 10 carries out welding with bottom plate 2 and is allowed to be formed combined type ferrite substrate structure up and down；Permanent magnet 5 constitutes outer with bottom plate 2
Add bias magnetic field that can carry out good magnetization to high magnetic moment ferrite substrate 11,；
The microstrip circulator that the present embodiment obtains, bandwidth of operation 7GHz-13GHz, transmission loss are 0.4 dB, normalize magnetic moment
P is 0.7, and port standing wave is 1.4, is isolated into 15dB.
The circulator of the present embodiment, loss simulation result as shown in figure 3, isolation simulation result as shown in Figure 4, standing wave emulation
The results are shown in Figure 5.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (3)
1. a kind of composite structure microstrip circulator up and down includes permanent magnet successively from top to bottom（5）, dieelctric sheet（4）And bottom plate
（2）, it is characterised in that：The dieelctric sheet（4）And bottom plate（2）Between be provided with low magnetic moment ferrite substrate（10）, the low magnetic
Square ferrite substrate（10）Microstrip circuit is arranged in upper surface（3）, the bottom plate（2）On be embedded with high magnetic moment ferrite substrate
（11）, the high magnetic moment ferrite substrate（11）With low magnetic moment ferrite substrate（10）It is adjacent.
2. composite structure microstrip circulator up and down according to claim 1, it is characterised in that：The low magnetic moment ferrite
Substrate（10）Saturation magnetization be 1800Gauss.
3. composite structure microstrip circulator up and down according to claim 1, it is characterised in that：The high magnetic moment ferrite
Substrate（11）Saturation magnetization be 2500Gauss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093628.9A CN108306085B (en) | 2018-01-31 | 2018-01-31 | Microstrip circulator with upper and lower combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093628.9A CN108306085B (en) | 2018-01-31 | 2018-01-31 | Microstrip circulator with upper and lower combined structure |
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| Publication Number | Publication Date |
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| CN108306085A true CN108306085A (en) | 2018-07-20 |
| CN108306085B CN108306085B (en) | 2024-01-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571503A (en) * | 2019-11-05 | 2019-12-13 | 成都八九九科技有限公司 | Microstrip circulator, isolator and T/R assembly |
| CN111509346A (en) * | 2020-06-15 | 2020-08-07 | 中国电子科技集团公司第九研究所 | Inverted structure circulator/isolator and processing method thereof |
| CN111883900A (en) * | 2020-07-20 | 2020-11-03 | 中国电子科技集团公司第九研究所 | Method for expanding bandwidth of lumped parameter circulator for communication |
| CN111883899A (en) * | 2020-07-20 | 2020-11-03 | 中国电子科技集团公司第九研究所 | Method for improving temperature stability of lumped parameter circulator |
| CN114447552A (en) * | 2022-02-10 | 2022-05-06 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Novel micro-strip circulator based on MEMS (micro-electromechanical systems) process and processing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571503A (en) * | 2019-11-05 | 2019-12-13 | 成都八九九科技有限公司 | Microstrip circulator, isolator and T/R assembly |
| CN110571503B (en) * | 2019-11-05 | 2020-02-04 | 成都八九九科技有限公司 | Microstrip circulator, isolator and T/R assembly |
| CN111509346A (en) * | 2020-06-15 | 2020-08-07 | 中国电子科技集团公司第九研究所 | Inverted structure circulator/isolator and processing method thereof |
| CN111883900A (en) * | 2020-07-20 | 2020-11-03 | 中国电子科技集团公司第九研究所 | Method for expanding bandwidth of lumped parameter circulator for communication |
| CN111883899A (en) * | 2020-07-20 | 2020-11-03 | 中国电子科技集团公司第九研究所 | Method for improving temperature stability of lumped parameter circulator |
| CN114447552A (en) * | 2022-02-10 | 2022-05-06 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Novel micro-strip circulator based on MEMS (micro-electromechanical systems) process and processing method thereof |
| CN114447552B (en) * | 2022-02-10 | 2023-01-13 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Novel micro-strip circulator based on MEMS (micro-electromechanical systems) process and processing method thereof |
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| CN108306085B (en) | 2024-01-16 |
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