CN111834717A - Wide-band circulator - Google Patents
Wide-band circulator Download PDFInfo
- Publication number
- CN111834717A CN111834717A CN202010481647.6A CN202010481647A CN111834717A CN 111834717 A CN111834717 A CN 111834717A CN 202010481647 A CN202010481647 A CN 202010481647A CN 111834717 A CN111834717 A CN 111834717A
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- Prior art keywords
- circulator
- substrate
- ferrite
- integrated substrate
- ceramic
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- 239000000758 substrate Substances 0.000 claims abstract description 47
- 239000000919 ceramic Substances 0.000 claims description 29
- 229910000859 α-Fe Inorganic materials 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 238000005476 soldering Methods 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000010344 co-firing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910000531 Co alloy Inorganic materials 0.000 claims description 3
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 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 9
- 238000004891 communication Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 229910000833 kovar Inorganic materials 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
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
This scheme provides a wide bandwidth circulator, includes: the insulating sheet and the permanent magnet are sequentially arranged on the heterogeneous integrated substrate from bottom to top; a slotted junction area is arranged on the periphery of the insulating sheet on the upper surface of the heterogeneous integrated substrate; and a matching circuit is arranged outside the grooved junction area. The scheme has the advantages of wide bandwidth, miniaturization and high performance, can reduce the magnetic loss of the circulator and improve the overall performance of the circulator.
Description
Technical Field
The application relates to the field of communication equipment, in particular to a miniaturized microwave ferrite broadband circulator.
Background
The ferrite circulator is an important microwave ferrite device, is widely applied to the fields of radar, microwave communication, microwave measurement and the like at present, and can realize microwave signal transmission and circulating reception, and simultaneously isolate microwave signals transmitted in a reverse direction, thereby playing the roles of stabilizing and protecting a microwave transmitting circuit. The currently common circulators are microstrip circulators, stripline circulators and waveguide circulators, according to the division of the transmission line form. The microstrip circulator is a planar structure device, is easy to realize circuit integration, and is widely applied to a phased array radar system.
Disclosure of Invention
The application provides a miniaturized microwave ferrite broadband circulator.
According to a first aspect of embodiments of the present application, there is provided a wide bandwidth circulator, comprising: the insulating sheet 5 and the permanent magnet 4 are sequentially arranged on the heterogeneous integrated substrate 1 from bottom to top;
a slotted junction area 3 is arranged on the periphery of the insulating sheet 5 on the upper surface of the heterogeneous integrated substrate 1;
the outside of the notched junction region 3 is configured with a matching circuit 2.
In a preferred embodiment, said hetero-integrated substrate 1 is arranged on the flip-chip 6 of the ceramic sealing alloy.
In a preferred embodiment, said heterogeneous integration substrate 1 comprises: a ceramic substrate and a ferrite;
the ferrite is positioned in a through hole which is preset in the center of the ceramic substrate.
In a preferred embodiment, the ferrite and the ceramic substrate are fixed together by low temperature co-firing.
In a preferred embodiment, the matching circuit 2 comprises: a plurality of microstrip transmission lines; the plurality of microstrip transmissions are arranged on the hetero-integrated substrate 1 in a centrosymmetric manner.
In a preferred embodiment, each of the microstrip transmission lines is a microstrip line with an equivalent length of one third of a wavelength.
In a preferred embodiment, the matching circuit 2 comprises: three microstrip transmission lines; the three microstrip transmission lines are connected to the slotted junction region 3 in a centrosymmetric manner with an included angle of 120 °.
In a preferred embodiment, the slotted junction region 3 is a donut-shaped or polygonal junction region; a plurality of grooves are formed in the junction area.
In a preferred embodiment, three rectangular grooves are formed in the junction area, and included angles of 120 degrees are formed between the grooves.
In a preferred embodiment, the material of the insulating sheet 5 is alumina; and/or the ceramic seal alloy soldering lug 6 is made of iron-nickel-cobalt alloy.
Advantageous effects
The technical scheme has the advantages of wide bandwidth, miniaturization and high performance, can reduce the magnetic loss of the circulator, and improves the overall performance of the circulator.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 shows a schematic diagram of a wideband circulator according to the present solution.
Reference numerals
1. Heterogeneous integrated substrate, 2, matching circuit, 3, slotted junction area, 4, permanent magnet, 5, insulating sheet, 6, ceramic seal alloy soldering lug.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The analysis and research of the prior art show that the common micro-strip circulator adopts the form of an all-ferrite substrate, a thin film circuit pattern is sputtered on the ferrite substrate, and the new number of circulator transmission is realized under the action of an external permanent magnet 4. The microstrip circulator with the structure has narrow working bandwidth and relatively large size, and cannot meet the requirements of radar and communication systems on the wide-bandwidth and miniaturization of circulators. Therefore, the scheme considers that the high-performance microwave dielectric ceramic and the ferrite are integrated on the same substrate, and the size of the circulator can be effectively reduced due to the fact that the microwave dielectric ceramic has a high dielectric constant. In addition, the microwave dielectric ceramic has no gyromagnetic characteristic, and the ferrite in the central annular area can realize uniform magnetization, so that a better annular effect can be obtained in a broadband.
As shown in fig. 1, the present solution discloses a miniaturized wideband circulator, which includes: the device comprises a heterogeneous integrated substrate 1, a matching circuit 2, a slotted junction region 3, a permanent magnet 4, an insulating sheet 5 and a ceramic seal alloy soldering lug 6. The heterogeneous integrated substrate 1 consists of a high-dielectric-constant microwave medium ceramic substrate and ferrite; the center of the high-dielectric-constant microwave dielectric ceramic substrate is provided with a through hole for containing the ferrite, wherein the high-dielectric-constant microwave dielectric ceramic substrate and the ferrite are co-fired together at a low temperature. The permanent magnet 4 serves to provide a uniform magnetization field. The insulating sheet 5 is used for isolating the permanent magnet 4 from the microstrip circuit. The ceramic seal alloy soldering lug 6 is connected with the lower surface of the heterogeneous integrated substrate 1, so that the heterogeneous integrated substrate 1 is fixed. The miniaturized wide-band circulator has the characteristics of wide band, miniaturization and high performance; by adopting the structure of the heterogeneous integrated substrate 1, the equivalent dielectric constant of the microstrip substrate is improved, and the volume of the circulator is reduced to the maximum extent. Preferably, in this embodiment, the insulating sheet 5 is made of alumina. The ceramic seal alloy soldering lug 6 is made of kovar alloy (iron-nickel-cobalt alloy).
Taking a circulator with a central frequency of 5GHz as an example, the circulator is designed on the surface of a ferrite substrate with the thickness of 1mm, the dielectric constant of the conventional ferrite substrate is 14, and the physical length of the quarter-wave matching circuit 2 is 4.4mm, while by adopting the structure of the heterogeneous integrated substrate 1, the physical length of the quarter-wave matching circuit 2 is reduced along with the increase of the dielectric constant, the dielectric constant of the microwave dielectric ceramic in the invention is 30, the physical length of the quarter-wave matching circuit 2 is 3.1mm, and the length of the microwave dielectric ceramic is 70% of that of the conventional ferrite substrate. In addition, the microwave dielectric ceramic replaces part of ferrite, so that the magnetic loss of the circulator can be reduced, and the overall performance of the circulator is improved.
In this scheme, the matching circuit 2 adopts three microstrip transmission lines. The three microstrip transmission lines are all microstrip lines with the equivalent length of one quarter of the wavelength. The three microstrip transmission lines are connected with the annular junction area in a symmetrical mode with an included angle of 120 degrees. The coupling effect is generated on the junction region while the broadband matching is realized, so that the impedance response of the junction region is gathered, and the matching bandwidth is improved.
In the scheme, the slotting junction area 3 is formed by opening three rectangular grooves in a circular or polygonal junction area, and the rectangular grooves mutually form an included angle of 120 degrees.
The present solution is further illustrated by way of example below.
The embodiment discloses a miniaturized broadband circulator, which comprises a heterogeneous integrated substrate 1, a matching circuit 2, a slotted junction region 3, a permanent magnet 4, an insulating sheet 5 and a ceramic seal alloy soldering lug 6, as shown in figure 1. The heterogeneous integrated substrate 1 is formed by low-temperature co-firing of high-dielectric-constant microwave dielectric ceramics and ferrite; the matching circuit 2 is composed of a plurality of sections of microstrip transmission lines which have the equivalent length of one quarter of wavelength and are arranged around a ring junction area; the slotted junction region 3 is symmetrically provided with three rectangular grooves in three directions of 120 degrees in a circular or polygonal annular region.
Specifically, in this embodiment, the hetero-integrated substrate 1 is composed of a high-k microwave dielectric ceramic substrate and a ferrite, wherein a circular through hole is formed in the center of the high-k microwave dielectric ceramic substrate, and the ferrite is embedded therein, and the hetero-integrated substrate 1 is formed by low-temperature co-firing. The matching circuit 2 is composed of three sections of microstrip transmission lines, and the microstrip transmission lines are composed of microstrip lines which have three-stage equivalent lengths of quarter wavelengths and are arranged around a ring junction area in 120 degrees. The slotted junction region 3 is formed by three rectangular slots in a circular shape or a polygonal shape such that the three rectangular slots are 120 ° to each other. The matching circuit 2 and the slotted junction region 3 are formed on the hetero-integrated substrate 1 by a thin film sputtering process. The permanent magnet 4 is a samarium cobalt permanent magnet 4. The insulating sheet 5 is made of alumina ceramic. The permanent magnet 4, the insulating sheet 5 and the heterogeneous integrated substrate 1 are bonded and fixed through epoxy glue. The ceramic seal alloy soldering lug 6 is made of kovar alloy, wherein the surface of the kovar alloy is subjected to gold plating treatment. The ceramic seal alloy soldering lug 6 and the lower surface of the heterogeneous integrated substrate 1 are fixed through welding flux in a welding mode.
In this embodiment, the structural parameters and material parameters of the miniaturized wideband circulator are as follows:
the miniaturized broadband circulator works in a C-X frequency band, and the central frequency is 7.5 GHz; the heterogeneous integrated substrate 1 is made of high dielectric constant alumina ceramic and ferrite, the thickness of the substrate is 0.5mm, the dielectric constant of a medium is about 30, the ferrite is made of garnet type materials, the dielectric constant is 14, the saturation magnetization is 1800Gs, and the diameter is 4 mm; the permanent magnet sheet is a samarium cobalt permanent magnet sheet; the insulating sheet 5 is made of alumina ceramic with dielectric constant of 8.6.
The miniaturized wide-band circulator is suitable for a surface mounting technology and is connected with an external microwave circuit through gold wire and gold band bonding.
The performance indexes of the miniaturized broadband circulator are as follows:
| frequency of operation | C～X |
| Insertion loss | ≤0.6dB |
| Degree of isolation | ≥15dB |
| Standing wave coefficient | ≤1.3dB |
| Temperature range | -55℃～85℃ |
| Overall dimension | 10mm*10mm*3.5mm |
From the above table, it can be seen that the miniaturized wideband circulator of the present invention has a wideband operating bandwidth of about 66%, the bandwidth of the device using the suppressed integration substrate is extended to 66%, and a smaller volume is ensured.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (10)
1. A wide bandwidth circulator, comprising: the insulating sheet (5) and the permanent magnet (4) are sequentially arranged on the heterogeneous integrated substrate (1) from bottom to top;
a slotted junction area (3) is arranged on the periphery of the insulating sheet (5) on the upper surface of the heterogeneous integrated substrate (1);
and a matching circuit (2) is arranged at the outer side of the grooved junction region (3).
2. Wideband circulator as claimed in claim 1, characterized in that the hetero-integrated substrate (1) is arranged on a frit (6) of ceramic sealing alloy.
3. Wideband circulator as claimed in claim 1, characterized in that said hetero-integrated substrate (1) comprises: a ceramic substrate and a ferrite;
the ferrite is positioned in a through hole which is preset in the center of the ceramic substrate.
4. The broadband circulator of claim 3, wherein the ferrite and the ceramic substrate are secured together by low temperature co-firing.
5. The anchorage tuner of claim 1, wherein the matching circuit (2) comprises: a plurality of microstrip transmission lines; the plurality of microstrip transmissions are arranged on the heterogeneous integrated substrate (1) in a centrosymmetric manner.
6. The wideband circulator of claim 5, wherein each of the microstrip transmission lines is a microstrip line having an equivalent length of one quarter wavelength.
7. The broadband circulator of claim 5, wherein the matching circuit (2) includes: three microstrip transmission lines; the three microstrip transmission lines are connected with the slotted junction region (3) in a centrosymmetric mode with an included angle of 120 degrees.
8. The wide circulator of claim 1 wherein the slotted junction region (3) is a circular or polygonal junction region; a plurality of grooves are formed in the junction area.
9. The wideband circulator of claim 8, wherein the junction has three rectangular slots, and the slots are disposed at 120 ° angles.
10. The wide band circulator of claim 1 wherein the material of the insulating sheet (5) is alumina; and/or the ceramic seal alloy soldering lug (6) is made of iron-nickel-cobalt alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481647.6A CN111834717A (en) | 2020-06-01 | 2020-06-01 | Wide-band circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010481647.6A CN111834717A (en) | 2020-06-01 | 2020-06-01 | Wide-band circulator |
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| Publication Number | Publication Date |
|---|---|
| CN111834717A true CN111834717A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010481647.6A Pending CN111834717A (en) | 2020-06-01 | 2020-06-01 | Wide-band circulator |
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| Country | Link |
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| CN (1) | CN111834717A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114335949A (en) * | 2021-11-26 | 2022-04-12 | 北京无线电测量研究所 | Micro-strip circulator |
| CN115295995A (en) * | 2022-07-21 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Broadband circuit of high intermodulation circulator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386469A (en) * | 2011-08-10 | 2012-03-21 | 电子科技大学 | Full X-band ferrite micro-strip circulator |
| CN107069162A (en) * | 2016-11-29 | 2017-08-18 | 北京无线电测量研究所 | A kind of microstrip circulator for being conducive to second harmonic to suppress |
| CN107845852A (en) * | 2017-10-20 | 2018-03-27 | 北京无线电测量研究所 | A kind of composite substrate formula microstrip circulator |
| CN207368190U (en) * | 2017-08-02 | 2018-05-15 | 成都八九九科技有限公司 | A kind of micro-strip ferrite circulator structure |
| CN209561594U (en) * | 2019-03-26 | 2019-10-29 | 南京广顺电子技术研究所有限公司 | Three port microstrip circulator of broadband |
-
2020
- 2020-06-01 CN CN202010481647.6A patent/CN111834717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386469A (en) * | 2011-08-10 | 2012-03-21 | 电子科技大学 | Full X-band ferrite micro-strip circulator |
| CN107069162A (en) * | 2016-11-29 | 2017-08-18 | 北京无线电测量研究所 | A kind of microstrip circulator for being conducive to second harmonic to suppress |
| CN207368190U (en) * | 2017-08-02 | 2018-05-15 | 成都八九九科技有限公司 | A kind of micro-strip ferrite circulator structure |
| CN107845852A (en) * | 2017-10-20 | 2018-03-27 | 北京无线电测量研究所 | A kind of composite substrate formula microstrip circulator |
| CN209561594U (en) * | 2019-03-26 | 2019-10-29 | 南京广顺电子技术研究所有限公司 | Three port microstrip circulator of broadband |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114335949A (en) * | 2021-11-26 | 2022-04-12 | 北京无线电测量研究所 | Micro-strip circulator |
| CN115295995A (en) * | 2022-07-21 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Broadband circuit of high intermodulation circulator |
| CN115295995B (en) * | 2022-07-21 | 2023-11-03 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Broadband circuit of high intermodulation circulator |
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Application publication date: 20201027 |