CN205452499U - From taking magnetic screen formula unijunction microstrip isolator - Google Patents
From taking magnetic screen formula unijunction microstrip isolator Download PDFInfo
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- CN205452499U CN205452499U CN201620258862.9U CN201620258862U CN205452499U CN 205452499 U CN205452499 U CN 205452499U CN 201620258862 U CN201620258862 U CN 201620258862U CN 205452499 U CN205452499 U CN 205452499U
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Abstract
The utility model discloses a from taking magnetic screen formula unijunction microstrip isolator, including metal soleplate, the metal soleplate top is equipped with the ferrite substrate, and the ferrite substrate is equipped with the permanent magnetic ferrite who provides the bias magnetic field, is equipped with the dielectric substrate between ferrite substrate and the permanent magnetic ferrite, the ferrite substrate lower surface is equipped with the ground connection metal level, and ferrite substrate upper surface is equipped with and ties annular microstrip circuit, it is equipped with a load resistance to tie to connect between one of them port and the earthing terminal among the three input output port of annular microstrip circuit, directly over permanent magnetic ferrite was located the annular microstrip circuit of knot, permanent magnetic ferrite electroplates in the outside had magnetic shield layer. The utility model discloses simple structure, reasonable in design, the magnetic leakage is very little, the magnetic field high -usage, full magnetism blocking function is good, has avoided the magnetic field mutual interference between the device and the external world, do benefit to the production assembly of product, be suitable for the miniaturized day by day and high demand that integrates of microstrip isolator, be suitable for batch production.
Description
Technical field
This utility model relates to magnetisable material and device technical field, specifically one and carries magnetic shield formula unijunction microstrip isolator.
Background technology
Microstrip isolator as a kind of Aero-Space electronics, communication system, investigation and significant components in electronic countermeasure field of being widely used in, at present in radar, electronics battle, navigate and know, communication base station uses in a large number.The research and development of new material promote developing rapidly of microwave system with design concept and advanced Technology, and this just requires that microstrip isolator is smaller, and weight is lighter, and integrated level is higher.While the system integration requires microstrip isolator compact structure, performance to be stablized, along with being continuously increased of microstrip isolator market demand also proposes higher requirement to batch production speed and R&D cycle.
Current load universal, built-in does not have between the unijunction microstrip isolator making of magnetic shield with one of them port with the earth terminal in three input/output end ports of the knot annular microstrip circuit on ferrite substrate surface to be connected a load resistance (load resistance may be provided on ferrite substrate, it is possible to is welded on metab).Whole microstrip isolator includes magnetically soft alloy base, it is positioned at the ferrite substrate above magnetically soft alloy base, ferrite substrate lower surface has metal ground plane, upper surface has knot annular microstrip circuit, it is provided that the permanent magnet of bias magnetic field realizes electric isolution with knot annular microstrip circuit support by dielectric substrate.
Generally, the permanent magnet of the bias magnetic field on loaded microstrip isolator is usually exposed to above ferrite substrate, the magnetic line of force that permanent magnet produces is in addition to the loop that the wallboard under the ferrite substrate and substrate of part and product forms Guan Bi, most of magnetic force alignment surroundings dissipate, cause leakage field, the impact so caused mainly has: one is that leakage field causes magnetic field utilization rate low, the magnetic field produced by permanent magnet only has partial magnetic field to be applied to tie on the ferrite substrate of annular microstrip circuit so that ferrite substrate fails fully to magnetize and have influence on the performance of product；Two is that the stray field dissipated can have interference to the components and parts that surrounding magnetic field is sensitive, thus has influence on microwave circuit performance；Three be have ferromagnetic material around product in the presence of, influence whether direction and the size of the bias magnetic field of microstrip isolator, change original magnetized state, thus affect the performance parameter of device, and then have influence on the performance of circuit.
Along with microwave system is to miniaturization, the development of multifunction, microwave components and module size require less, in compact circuit, in order to prevent microstrip isolator and peripheral circuits and the electromagnetic interference of outer brief introduction, the bias magnetic core of microstrip isolator is shielded by the measure that is usually taken.
The existing unijunction microstrip isolator without magnetic shield, the permanent magnet producing bias magnetic field is placed in above ferrite substrate, the magnetic pole of permanent magnet upper surface exposes in atmosphere, the magnetic pole of permanent magnet upper surface only has the magnetic line of force of about half and forms closed-loop path with metab, and the state that the magnetic force alignment surrounding of half dissipates forms leakage field phenomenon.
Utility model content
The purpose of this utility model is to provide one to carry magnetic shield formula unijunction microstrip isolator, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
One carries magnetic shield formula unijunction microstrip isolator, including metal base plate, metal base plate is arranged over ferrite substrate, ferrite substrate is provided with the permanent-magnet ferrite providing bias magnetic field, dielectric substrate it is provided with between ferrite substrate and permanent-magnet ferrite, the upper surface of described dielectric substrate is fixed with permanent-magnet ferrite, and the lower surface of dielectric substrate is fixed with ferrite substrate；Ferrite substrate lower surface is provided with ground metal layer, ferrite substrate upper surface is provided with knot annular microstrip circuit, being equipped with a load resistance between one of them port and earth terminal in three input/output end ports of described knot annular microstrip circuit, described load resistance is arranged on ferrite substrate or is welded on metal base plate；Permanent-magnet ferrite is positioned at directly over knot annular microstrip circuit, is electroplate with magnetic masking layer outside permanent-magnet ferrite.
As further program of the utility model: described dielectric substrate uses politef or ceramic medium material to make.
As this utility model further scheme: described knot annular microstrip circuit is round Y knot annular microstrip circuit, triangular form Y knot annular microstrip circuit, hexangle type Y knot annular microstrip circuit or fish spicule type Y knot annular microstrip circuit.
As this utility model further scheme: described magnetic masking layer uses copper, nickel or other magnetically soft alloy material to make, its upright projection is circular, rectangle or ellipse.
Compared with prior art, the beneficial effects of the utility model are: this utility model simple in construction, and reasonable in design, leakage field is the least, magnetic field utilization rate is high, and all-magnetism shielding function is good, it is to avoid the magnetic field between device and the external world interferes；Being beneficial to the production assembling of product, the volume increase to product can be ignored, and is suitable for microstrip isolator miniaturization day by day and highly integrated demand, is suitable to batch production.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-metal base plate, 2-ferrite substrate, 3-dielectric substrate, 4-permanent-magnet ferrite, 5-magnetic masking layer.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1, one carries magnetic shield formula unijunction microstrip isolator, including metal base plate 1, metal base plate 1 is arranged over ferrite substrate 2, ferrite substrate 2 is provided with the permanent-magnet ferrite 4 providing bias magnetic field, being provided with dielectric substrate 3 between ferrite substrate 2 and permanent-magnet ferrite 4, the upper surface of described dielectric substrate 3 is fixed with permanent-magnet ferrite 4, and the lower surface of dielectric substrate 3 is fixed with ferrite substrate 2；Ferrite substrate 2 lower surface is provided with ground metal layer, ferrite substrate 2 upper surface is provided with knot annular microstrip circuit, being equipped with a load resistance between one of them port and earth terminal in three input/output end ports of described knot annular microstrip circuit, described load resistance is arranged on ferrite substrate 2 or is welded on metal base plate 1；Permanent-magnet ferrite 4 is positioned at directly over knot annular microstrip circuit, is electroplate with magnetic masking layer 5, realizes electric isolution by dielectric substrate 3 between permanent-magnet ferrite 4 and knot annular microstrip circuit outside permanent-magnet ferrite 4.In this utility model, magnetic masking layer 5 is to electroplate on permanent-magnet ferrite 4, and compared with the microstrip isolator of additional magnetic shielding cover, volume is less, and weight is lighter, more compact structure.
Further, dielectric substrate 3 described in the utility model uses politef or ceramic medium material to make.
Further, knot annular microstrip circuit described in the utility model is round Y knot annular microstrip circuit, triangular form Y knot annular microstrip circuit, hexangle type Y knot annular microstrip circuit or fish spicule type Y knot annular microstrip circuit.
Further, magnetic masking layer 5 described in the utility model uses copper, nickel or other magnetically soft alloy material to make, and its upright projection is circular, rectangle or ellipse.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (4)
1. one kind carries magnetic shield formula unijunction microstrip isolator, including metal base plate (1), metal base plate (1) is arranged over ferrite substrate (2), ferrite substrate (2) is provided with the permanent-magnet ferrite (4) providing bias magnetic field, it is characterized in that: between ferrite substrate (2) and permanent-magnet ferrite (4), be provided with dielectric substrate (3), the upper surface of described dielectric substrate (3) is fixed with permanent-magnet ferrite (4), and the lower surface of dielectric substrate (3) is fixed with ferrite substrate (2)；Ferrite substrate (2) lower surface is provided with ground metal layer, ferrite substrate (2) upper surface is provided with knot annular microstrip circuit, being equipped with a load resistance between one of them port and earth terminal in three input/output end ports of described knot annular microstrip circuit, described load resistance is arranged on ferrite substrate (2) and above or is welded on metal base plate (1)；Permanent-magnet ferrite (4) is positioned at directly over knot annular microstrip circuit, and permanent-magnet ferrite (4) outside is electroplate with magnetic masking layer (5).
The most according to claim 1 carry magnetic shield formula unijunction microstrip isolator, it is characterised in that: described dielectric substrate (3) is alumina ceramic plate.
The most according to claim 1 carry magnetic shield formula unijunction microstrip isolator, it is characterised in that: described knot annular microstrip circuit is round Y knot annular microstrip circuit, triangular form Y knot annular microstrip circuit, hexangle type Y knot annular microstrip circuit or fish spicule type Y knot annular microstrip circuit.
The most according to claim 1 carry magnetic shield formula unijunction microstrip isolator, it is characterised in that: described magnetic masking layer (5) uses copper, nickel or other magnetically soft alloy material to make, and its upright projection is circular, rectangle or ellipse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258862.9U CN205452499U (en) | 2016-03-31 | 2016-03-31 | From taking magnetic screen formula unijunction microstrip isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258862.9U CN205452499U (en) | 2016-03-31 | 2016-03-31 | From taking magnetic screen formula unijunction microstrip isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205452499U true CN205452499U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620258862.9U Expired - Fee Related CN205452499U (en) | 2016-03-31 | 2016-03-31 | From taking magnetic screen formula unijunction microstrip isolator |
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| CN (1) | CN205452499U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542669A (en) * | 2019-09-20 | 2021-03-23 | Tdk株式会社 | Nonreciprocal circuit element |
| CN114171869A (en) * | 2021-11-22 | 2022-03-11 | 北京无线电测量研究所 | Micro-strip circulator with closed magnetic circuit |
| CN114759328A (en) * | 2022-04-15 | 2022-07-15 | 北京无线电测量研究所 | Microstrip isolator |
-
2016
- 2016-03-31 CN CN201620258862.9U patent/CN205452499U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542669A (en) * | 2019-09-20 | 2021-03-23 | Tdk株式会社 | Nonreciprocal circuit element |
| CN112542669B (en) * | 2019-09-20 | 2021-08-10 | Tdk株式会社 | Nonreciprocal circuit element |
| CN114171869A (en) * | 2021-11-22 | 2022-03-11 | 北京无线电测量研究所 | Micro-strip circulator with closed magnetic circuit |
| CN114759328A (en) * | 2022-04-15 | 2022-07-15 | 北京无线电测量研究所 | Microstrip isolator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20170331 |