CN203596403U - Unijunction microstrip circulator having magnetic shielding cover - Google Patents
Unijunction microstrip circulator having magnetic shielding cover Download PDFInfo
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- CN203596403U CN203596403U CN201320837822.6U CN201320837822U CN203596403U CN 203596403 U CN203596403 U CN 203596403U CN 201320837822 U CN201320837822 U CN 201320837822U CN 203596403 U CN203596403 U CN 203596403U
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- magnetic shielding
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Abstract
A unijunction microstrip circulator having a magnetic shielding cover belongs to the technical field of magnetic materials and devices. The unijunction microstrip circulator comprises a soft magnetic alloy base plate and a ferrite substrate located on the soft magnetic alloy base plate. The upper surface of the ferrite substrate is provided with a junction circulation microstrip circuit, while the lower surface of the ferrite substrate is provided with a grounding metal layer. A permanent magnet is arranged on the geometric center of the junction circulation microstrip circuit. The magnetic shielding cover is arranged on the permanent magnet. A first medium substrate is arranged between the permanent magnet and the junction circulation microstrip circuit. A second medium substrate is arranged between the permanent magnet and the magnetic shielding cover. The magnetic shielding cover is formed by a piece of soft magnetic flat material, the rim of which is bended downwards. The minimum internal horizontal dimension of the cover is greater than the diameter of the permanent magnet, but smaller than the edge length of the ferrite substrate. The bottom part of the rim of the cover does not contact with the ferrite substrate. The unijunction microstrip circulator provided by the utility model has a good magnetic shielding function and is simple in structure, stable in performance, and convenient for production and regulation at the same time; and the unijunction microstrip circulator can satisfy the ever-increasing application requirements of miniaturization and high integration.
Description
Technical field
The utility model belongs to magnetisable material and device technical field, relates to microstrip circulator, especially the unijunction microstrip circulator with magnetic shielding cover.
Background technology
Microstrip circulator, as a kind of significant components that is widely used in Aero-Space electronics, communication system and scouts antagonism field, uses in a large number at present in radar, electronic warfare, navigation and guidance, communication base station.New design concept and advanced technology promote microwave system develop rapidly, and this just requires the size of microstrip circulator less, and integrated level is higher.The system integration requires circulator, the small and exquisite while stable performance of spacer structures, and the continuous increase of microstrip circulator market demand simultaneously also proposes requirements at the higher level to batch production speed and R&D cycle.
It shown in Fig. 1, is unijunction circulator perspective view general, that do not there is magnet shielding structure, comprise magnetically soft alloy base plate 2, ferrite substrate 1(ferrite substrate 1 lower surface that is positioned at magnetically soft alloy base plate 2 tops has metal ground plane), its surface has the belt microstrip circuit 5 of knot, the permanent magnet 3 of bias magnetic field is provided and ties to go in ring and realize electric the isolation by first medium substrate 4 between microstrip circuit 5.
Conventionally, the permanent magnet that is added in the bias magnetic field on microstrip circulator is to be generally exposed to ferrite substrate superjacent air space, the magnetic line of force that permanent magnet produces forms closed loop except part and ferrite substrate 1 and the magnetically soft alloy base plate 2 of product, most of magnetic lines of force are dispersed to surrounding, cause leakage field, the impact causing like this mainly contains: the one, and leakage field causes magnetic field utilance low, the magnetic field being produced by permanent magnet only has part magnetic fields to have knot to surface to go in ring on the ferrite substrate of microstrip circuit 51, make ferrite substrate 1 fail fully magnetization and have influence on the performance of product, the 2nd, the stray field of dispersing can have interference to the components and parts of surrounding magnetic field sensitivity, thereby has influence on microwave circuit performance, the 3rd, when product has ferromagnetic substance to exist around (as ferroalloy or microwave absorbing material), can have influence on direction and the size of the bias magnetic field of microstrip circulator, change original magnetized state, thereby affect the performance parameter of device, and then have influence on the performance of circuit.
Along with microwave system is to the development of miniaturization, multifunction, microwave components and module size require less, in compact circuit, in order to prevent between microstrip circulator and peripheral circuits and the external world magnetic disturbance each other, conventionally adopt magnetic shielding cover to shield the bias magnetic field of circulator.
The unijunction microstrip circulator without magnetic shielding cover shown in Fig. 1,2, the permanent magnet 3 that produces bias magnetic field is placed in the top of ferrite substrate 1, the magnetic pole of permanent magnet 3 upper surfaces is exposed in the air, only the have an appointment magnetic line of force and the magnetically soft alloy base plate 2 of half of the magnetic pole of permanent magnet 3 upper surfaces forms closed loop, and the state that the magnetic line of force of half is dispersed to surrounding forms leakage field phenomenon.Be the magnetic field simulation figure without magnetic shielding cover unijunction microstrip circulator as shown in Figure 3, reflect the power in magnetic field in figure with gradient colors such as white, grey, black, color represents that magnetic field intensity is larger more in vain; The more black expression magnetic field intensity of color is more weak.As can be seen from the figure in the region that radius is 5mm above ferrite substrate 1, also has very strong leakage field (gray area), it is only between 50～60% by the magnetic field utilance of substrate that emulation shows, and leakage field has accounted for 40～50%, thereby the performance of product itself and peripheral circuit is had to larger impact.
Existing a kind of unijunction microstrip circulator structure with all-magnetism shielding function as shown in Figure 4, comprise equally magnetically soft alloy base plate 2, ferrite substrate 1(ferrite substrate 1 surface that is positioned at magnetically soft alloy base plate 2 tops has the belt microstrip circuit of knot, lower surface has metal ground plane), the permanent magnet 3 of bias magnetic field is provided, permanent magnet 3 is positioned at the top of the belt microstrip circuit geometric center of knot, permanent magnet 3 tops have the magnetic shielding cover 7 that adopts soft magnetic material to realize, permanent magnet 3 and knot go in ring and realize electricity isolation by first medium substrate 4 between microstrip circuit, between permanent magnet 3 and magnetic shielding cover 7, realize electricity isolation by second medium substrate 6.
The unijunction microstrip circulator with all-magnetism shielding cover shown in Fig. 4, its magnetic shielding cover 7 is hat-shaped structures.Permanent magnet 3 is covered on inside completely by this magnetic shielding cover 7, its edge contacts completely with magnetically soft alloy base plate 2, magnetic shielding cover 7 forms a totally enclosed magnetic shielding cover with magnetically soft alloy base plate 2, forms completely closed magnetic loop between magnetically soft alloy base plate 2, permanent magnet 3 and magnetic shielding cover 7.Fig. 3 is the magnetic field simulation figure with all-magnetism shielding unijunction microstrip circulator, and as can be seen from the figure the region beyond radome is black entirely, represents that the region leakage field outside radome is very little, and leakage field only has 1～2%, and magnetic field utilance approaches 100%.This unijunction microstrip circulator all-magnetism shielding function is very good, has avoided the magnetic field phase mutual interference between device and the external world.
But this microstrip circulator structure is comparatively complicated, be unfavorable for the Assembling Production of product, also be unfavorable for further dwindling the volume of product, if adopt the structure of hat-shaped, in the time making, need reserved window so that introduce or draw the input/output port signal of the belt microstrip circuit of knot, the debugging that is not easy to tie belt microstrip circuit after magnetic shielding cover 7 encapsulation, magnetic shielding cover 7 adopts punch forming conventionally in addition, after encapsulation there is certain mechanical stress in inside, is easy to cause the fragmentation of ferrite substrate 1 when serious.
Summary of the invention
The unijunction microstrip circulator with magnetic shielding cover that the utility model provides, there is good magnetic screen function, simultaneously simple in structure, stable performance, be convenient to produce and debugging, can meet microstrip ferrite device miniaturization and highly integrated application demand day by day, be applicable to the requirement of the production in enormous quantities of product.
The purpose of this utility model is achieved through the following technical solutions:
With a unijunction microstrip circulator for magnetic shielding cover, its structure as shown in Figure 6, comprises magnetically soft alloy base plate 2, is positioned at the ferrite substrate 1 and the permanent magnet 3 that bias magnetic field is provided of magnetically soft alloy base plate 2 tops; Ferrite substrate 1 lower surface has ground metal layer, and upper surface has the belt microstrip circuit of knot; Provide the permanent magnet 3 of bias magnetic field to be positioned at the top of the belt microstrip circuit geometric center of knot, permanent magnet 3 tops have the magnetic shielding cover 7 that adopts soft magnetism material slab to make, permanent magnet 3 and knot go in ring and realize electricity isolation by first medium substrate 4 between microstrip circuit, between permanent magnet 3 and magnetic shielding cover 7, realize electricity isolation by second medium substrate 6.With the unijunction circulator difference with magnetic shielding cover shown in Fig. 4 be, the unijunction circulator with magnetic shielding cover that the utility model provides, its magnetic shielding cover 7 is formed and the bending edge bottom of magnetic shielding cover 7 does not contact with ferrite substrate 1 but leaves gap by soft magnetism plate material edge downward bending, and in the minimum cover of magnetic shielding cover 7, horizontal size is greater than the diameter of permanent magnet 3 but is less than the length of side of ferrite substrate 1.
In technique scheme, between magnetically soft alloy base plate 2 and ferrite substrate 1, interfix, first medium substrate 4 two sides are fixing with ferrite substrate 1 and permanent magnet 3 respectively, and second medium substrate 6 two sides are fixing with permanent magnet 3 and magnetic shielding cover 7 respectively.
The unijunction microstrip circulator with magnetic shielding cover that the utility model provides, is forming closed-loop path by permanent magnet 3 and second medium substrate 6, magnetic shielding cover 7, air, ferrite substrate 1, magnetically soft alloy base plate 2 and first medium substrate 4.Fig. 7 is the unijunction microstrip circulator magnetic field simulation figure with magnetic shielding cover that the utility model provides, as can be seen from the figure, the region of gap (clearance distance is 0.0mm～2.0mm) the about 1mm of scope forming between magnetic shielding cover 7 and ferrite substrate 1 has a small amount of leakage field to produce, among the loop that the issue of magnetic field intensity mainly needs in this design.Above radome and surrounding color be that black represents that leakage field is very weak.All show by emulation and test, leakage field is less than 5%, 95% above magnetic field along this loop transmission, and magnetic field utilance is higher, and its shield effectiveness approaches the unijunction microstrip circulator with all-magnetism shielding cover in Fig. 4.
Fig. 7 emulation shows, effective magnetizing sphere of action mainly concentrates near permanent magnet, and therefore the zone of action is need to realize magnetic screen, prevent and the nucleus of extraneous phase mutual interference near permanent magnet.Therefore the unijunction microstrip circulator with magnetic shielding cover that the utility model provides, the cover inside dimension of its magnetic shielding cover 7 is only greater than the diameter of permanent magnet 3 but is less than the length of side (when actual fabrication can much smaller than the length of side of ferrite substrate 1) of ferrite substrate 1, so both shielded permanent magnet central role region, be conducive to again reduce the occupied space of whole circulator, reach the effect that reduces volume simultaneously.
In addition, the unijunction microstrip circulator with magnetic shielding cover that the utility model provides, its magnetically soft alloy base plate 2 and magnetic shielding cover 7 form a not exclusively magnet shielding structure for sealing.The edge bottom of magnetic shielding cover 7 does not contact with ferrite substrate 1 but leaves gap, can guarantee to form closed magnetic loop between magnetic alloy base plate 2, permanent magnet 3 and magnetic shielding cover 7.Although compared to the technical scheme shown in Fig. 4, the unijunction microstrip circulator with magnetic shielding cover that the utility model provides is not stopped leakage field phenomenon, but magnetic screen function of the present utility model has approached the effect of the unijunction microstrip circulator with all-magnetism shielding cover in Fig. 4 very much, magnetic field utilance reaches more than 95%, can meet the requirement of most application scenarios.After using MAXWELL software to make a large amount of emulation and comparison, find, the utility model Shielding plan leakage field can be effectively controlled, the magnetic line of force transmits in the magnetic circuit of designing requirement, and production in very little scope, does not form the impact on product itself and peripheral circuits less than 5% leakage field.
Compared with the unijunction microstrip circulator with all-magnetism shielding cover in Fig. 4, the utility model is placed in magnetic shielding cover 7 top of substrate, substrate is not wrapped up to radome inside, makes like this product size less, in the miniaturization of product, more has superiority.
The utility model is designed to the edge bottom of magnetic shielding cover 7 not contact with ferrite substrate 1 but leaves gap, maximum benefit is to be convenient to being connected of device and external circuitry, be convenient to debug tying the microstrip line circuit that goes in ring in assembling process simultaneously, after device package, there is not mechanical stress, avoided the technical problem of the ferrite substrate fragmentation that sealing brings completely mechanical stress causes yet.
In sum, the unijunction microstrip circulator with magnetic shielding cover that the utility model provides, there is good magnetic screen function, simultaneously simple in structure, stable performance, be convenient to produce and debugging, can meet micro-with device miniaturization and high integrated application demand and can realize multiband application day by day.
Accompanying drawing explanation
Fig. 1 is unijunction circulator perspective view universal, that do not have magnetic shielding cover.
Fig. 2 is the unijunction microstrip circulator cross-sectional view shown in Fig. 1 without magnetic shielding cover.
Fig. 3 is the magnetic field simulation figure shown in Fig. 1 without the unijunction microstrip circulator of magnetic shielding cover.
Fig. 4 is the unijunction microstrip circulator cross-sectional view with all-magnetism shielding cover.
Fig. 5 is the magnetic field simulation figure of the unijunction microstrip circulator with all-magnetism shielding cover.
Fig. 6 is the unijunction microstrip circulator cross-sectional view with radome that the utility model provides.
Fig. 7 is the magnetic field simulation figure with radome unijunction microstrip circulator that the utility model provides.
In Fig. 1, Fig. 2, Fig. 4 and Fig. 6, the corresponding name of Reference numeral is called:
The 1st, ferrite substrate, the 2nd, magnetically soft alloy base plate, the 3rd, permanent magnet, the 4th, first medium substrate, the 5th, the belt microstrip circuit of knot, the 6th, second medium substrate, the 7th, magnetic shielding cover.
Embodiment
Below in conjunction with embodiment, the utility model is made to detailed description.
With a unijunction microstrip circulator for magnetic shielding cover, its structure as shown in Figure 6, comprises magnetically soft alloy base plate 2, is positioned at the ferrite substrate 1 and the permanent magnet 3 that bias magnetic field is provided of magnetically soft alloy base plate 2 tops; Ferrite substrate 1 lower surface has ground metal layer, and upper surface has the belt microstrip circuit of knot; Provide the permanent magnet 3 of bias magnetic field to be positioned at the top of the belt microstrip circuit geometric center of knot, permanent magnet 3 tops have the magnetic shielding cover 7 that adopts soft magnetism material slab to make, permanent magnet 3 and knot go in ring and realize electricity isolation by first medium substrate 4 between microstrip circuit, between permanent magnet 3 and magnetic shielding cover 7, realize electricity isolation by second medium substrate 6.With the unijunction circulator difference with magnetic shielding cover shown in Fig. 4 be, the unijunction circulator with magnetic shielding cover that the utility model provides, its magnetic shielding cover 7 is formed and the bending edge bottom of magnetic shielding cover 7 does not contact with ferrite substrate 1 but leaves gap by soft magnetism plate material edge downward bending, and in the minimum cover of magnetic shielding cover 7, horizontal size is greater than the diameter of permanent magnet 3 but is less than the length of side of ferrite substrate 1.
In technique scheme, between magnetically soft alloy base plate 2 and ferrite substrate 1, adopt and be welded and fixed, first medium substrate 4 two sides adopt adhesive to be adhesively fixed with ferrite substrate 1 and permanent magnet 3 respectively, and second medium substrate 8 two sides adopt adhesive to be adhesively fixed with permanent magnet 3 and magnetic shielding cover 9 respectively.
The annular microstrip circuit of described knot is that round Y ties that annular microstrip circuit, triangular form Y are tied annular microstrip circuit, hexangle type Y ties annular microstrip circuit or fishbone type Y ties annular microstrip circuit.
First, second dielectric substrate can adopt the materials such as polysulfones, polytetrafluoroethylene, pottery or other medium to make.
Described magnetic shielding cover can adopt Armco iron, iron-nickel alloy or other alloy material with soft magnet performance to make, and its upright projection shape can be rectangle, circle or oval.Be shaped as the magnetic shielding cover of rectangle for upright projection, can be formed by two opposite side of rectangle soft magnetism plate material or any three limits or four limit downward bendings; Be shaped as circular or oval-shaped magnetic shielding cover for upright projection, can adopt magnetically soft alloy disk to be directly stamped to form.
Claims (9)
1. the unijunction microstrip circulator with magnetic shielding cover, its structure comprises magnetically soft alloy base plate (2), be positioned at the ferrite substrate (1) of magnetically soft alloy base plate (2) top, ferrite substrate (1) lower surface has ground metal layer, ferrite substrate (1) upper surface has the annular microstrip circuit of knot, provide the permanent magnet (3) in bigoted magnetic field to be positioned at the top of the annular microstrip circuit geometric center of knot, permanent magnet (3) top has the magnetic shielding cover (7) that adopts soft magnetic material to realize, between permanent magnet (3) and the annular microstrip circuit of knot, realize electricity isolation by first medium substrate (4), between permanent magnet (3) and magnetic shielding cover (7), realize electricity isolation by second medium substrate (6), it is characterized in that, magnetic shielding cover (7) is formed and the bending edge bottom of magnetic shielding cover (7) does not contact with ferrite substrate (1) but leaves gap by soft magnetism plate material edge downward bending, and in the minimum cover of magnetic shielding cover (7), horizontal size is greater than the diameter of permanent magnet (3) but is less than the length of side of ferrite substrate (1).
2. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 1, is characterized in that, the gap between the edge bottom of magnetic shielding cover (7) and ferrite substrate (1) is 0.0mm～2.0mm.
3. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 1 or 2, it is characterized in that, between described magnetically soft alloy base plate (2) and ferrite substrate (1), interfix, first medium substrate (4) two sides is fixing with ferrite substrate (1) and permanent magnet (3) respectively, and second medium substrate (6) two sides is fixing with permanent magnet (3) and magnetic shielding cover (7) respectively.
4. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 3, is characterized in that, between described magnetically soft alloy base plate (2) and ferrite substrate (1), adopts welding manner to fix; First medium substrate (4) two sides adopts bonding mode fixing with ferrite substrate (1) and permanent magnet (3) respectively, and second medium substrate (6) two sides adopts bonding mode fixing with permanent magnet (3) and magnetic shielding cover (7) respectively.
5. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 1 or 2, it is characterized in that, the annular microstrip circuit of described knot is that round Y ties that annular microstrip circuit, triangular form Y are tied annular microstrip circuit, hexangle type Y ties annular microstrip circuit or fishbone type Y ties annular microstrip circuit.
6. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 1 or 2, is characterized in that, first, second dielectric substrate adopts polysulfones, polytetrafluoroethylene or ceramic medium material to make.
7. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 1 or 2, it is characterized in that, magnetic screen face shield is shape for hat, and shape for hat magnetic screen face shield adopts Armco iron, iron-nickel alloy or other magnetically soft alloy material to make, and its upright projection shape is rectangle, circle or oval.
8. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 7, it is characterized in that, if the upright projection shape of described shape for hat magnetic shielding cover is rectangle, formed by two opposite side of rectangle soft magnetism plate material or any three limits or four limit downward bendings, or be directly stamped to form by rectangle soft magnetism plate material.
9. the unijunction microstrip circulator with magnetic shielding cover as claimed in claim 7, is characterized in that, if the upright projection shape of described shape for hat magnetic shielding cover is circular or oval, adopts magnetically soft alloy disk to be directly stamped to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320837822.6U CN203596403U (en) | 2013-12-18 | 2013-12-18 | Unijunction microstrip circulator having magnetic shielding cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320837822.6U CN203596403U (en) | 2013-12-18 | 2013-12-18 | Unijunction microstrip circulator having magnetic shielding cover |
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|---|---|
| CN203596403U true CN203596403U (en) | 2014-05-14 |
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|---|---|---|---|
| CN201320837822.6U Withdrawn - After Issue CN203596403U (en) | 2013-12-18 | 2013-12-18 | Unijunction microstrip circulator having magnetic shielding cover |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647125A (en) * | 2013-12-18 | 2014-03-19 | 成都致力微波科技有限公司 | Unijunction microstrip circulator or microstrip isolator with magnetic shielding case |
| CN104752798A (en) * | 2015-03-12 | 2015-07-01 | 西安电子科技大学 | Recyclable microwave circulator |
| CN107192971A (en) * | 2017-07-21 | 2017-09-22 | 上海联影医疗科技有限公司 | Circulator cabinet and circulator components |
| CN115425379A (en) * | 2022-09-21 | 2022-12-02 | 河北美泰电子科技有限公司 | MEMS circulator, packaging method thereof and microwave component |
-
2013
- 2013-12-18 CN CN201320837822.6U patent/CN203596403U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647125A (en) * | 2013-12-18 | 2014-03-19 | 成都致力微波科技有限公司 | Unijunction microstrip circulator or microstrip isolator with magnetic shielding case |
| CN103647125B (en) * | 2013-12-18 | 2016-08-17 | 成都致力微波科技有限公司 | The unijunction microstrip circulator of a kind of band magnetic shielding cover and microstrip isolator |
| CN104752798A (en) * | 2015-03-12 | 2015-07-01 | 西安电子科技大学 | Recyclable microwave circulator |
| CN104752798B (en) * | 2015-03-12 | 2017-10-24 | 西安电子科技大学 | reusable microwave circulator |
| CN107192971A (en) * | 2017-07-21 | 2017-09-22 | 上海联影医疗科技有限公司 | Circulator cabinet and circulator components |
| CN107192971B (en) * | 2017-07-21 | 2023-08-18 | 上海联影医疗科技股份有限公司 | Circulator cabinet and circulator assembly |
| CN115425379A (en) * | 2022-09-21 | 2022-12-02 | 河北美泰电子科技有限公司 | MEMS circulator, packaging method thereof and microwave component |
| CN115425379B (en) * | 2022-09-21 | 2024-02-06 | 河北美泰电子科技有限公司 | MEMS circulator, packaging method thereof and microwave component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140514 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |