CN116417767A - Low-temperature-resistant broadband circulator - Google Patents
Low-temperature-resistant broadband circulator Download PDFInfo
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- CN116417767A CN116417767A CN202310171911.XA CN202310171911A CN116417767A CN 116417767 A CN116417767 A CN 116417767A CN 202310171911 A CN202310171911 A CN 202310171911A CN 116417767 A CN116417767 A CN 116417767A
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- cover plate
- groove
- ferrite
- circulator
- upper cover
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 66
- 239000000919 ceramic Substances 0.000 claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 17
- 229910000828 alnico Inorganic materials 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 7
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 6
- -1 aluminum nickel cobalt Chemical compound 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- H01P1/38—Circulators
- H01P1/383—Junction circulators, e.g. Y-circulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/30—Auxiliary devices for compensation of, or protection against, temperature or moisture effects ; for improving power handling capability
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Non-Reversible Transmitting Devices (AREA)
Abstract
The low-temperature-resistant broadband circulator comprises an upper cover plate and a lower cover plate which are oppositely arranged, wherein the top surface of the upper cover plate is provided with a first groove, and the bottom surface of the upper cover plate is provided with a second groove; the top surface of the lower cover plate is provided with a third groove, and the bottom surface is provided with a fourth groove; a first magnet and a medium ring are arranged in the first groove; the second groove is internally provided with a first ferrite; a second ferrite is arranged in the third groove; a second magnet and a medium ring are arranged in the fourth groove; the first magnet and the second magnet are made of aluminum nickel cobalt, the ferrite is made of ceramic ring ferrite, and a center conductor is arranged between the medium rings. According to the low-temperature-resistant broadband circulator provided by the invention, the magnetic circuit design is formed by the alnico magnet and the dielectric ring, the low-temperature performance of the broadband circulator is improved under the synergistic effect of the ferrite, the alnico magnet and the dielectric ring magnetic circuit, the data meets the requirement at the limit temperature (-196 ℃), the isolation of forward propagation loss is less than or equal to 0.5dB, and the isolation of reverse propagation loss and return loss are both greater than or equal to 18dB.
Description
Technical Field
The invention relates to the technical field of communication transmission, in particular to a low-temperature-resistant broadband circulator.
Background
The circulator is a multiport device that transmits an incident wave entering any one port thereof into the next port in order of direction determined by the static bias magnetic field. In general, the circulator generally adopts the combined action of a high-frequency wave field applied outside the ferrite and a constant direct-current magnetic field to generate gyromagnetic characteristics, and electromagnetic waves propagating in the ferrite are polarized and rotated and strongly absorbed by utilizing the gyromagnetic characteristics, so that the electromagnetic waves are controlled to be transmitted along a certain annular direction, and the independent functions are realized between the output end of the high-frequency power amplifier and a load. The circulator has the characteristics of small volume, wide frequency band, small insertion loss and the like, so that the circulator is widely applied to the field of communication transmission.
The working in the field of quantum computing communication requires low-temperature conditions to reduce atom movement and provide a vibration-free environment, and a circulator is used as a radio frequency component essential for quantum communication, and needs to be adjusted from original conventional working temperature (-40-85 ℃) to low-temperature working environment (minimum-196 ℃), so that rare metals are fused into circulator components to meet low-temperature requirements in the prior art, but the manufacturing process is complex and the cost is high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the low-temperature-resistant broadband circulator meets the normal operation of low-temperature working conditions and provides higher working bandwidth.
In order to solve the technical problems, the invention adopts the following technical scheme:
the low-temperature-resistant broadband circulator is characterized by comprising an upper cover plate and a lower cover plate which are oppositely arranged, wherein a first groove is formed in one surface of the upper cover plate, which is opposite to the lower cover plate, a second groove is formed in one surface of the upper cover plate, which is opposite to the lower cover plate, a third groove is formed in one surface of the lower cover plate, which is opposite to the upper cover plate, and a fourth groove is formed in one surface of the lower cover plate, which is opposite to the upper cover plate;
a first magnet and a first medium ring are arranged in the first groove;
a first ferrite is arranged in the second groove;
a second ferrite is arranged in the third groove;
a second magnet and a second medium ring are arranged in the fourth groove;
the first magnet and the second magnet are alnico magnets, the first ferrite and the second ferrite are ceramic ring ferrites, and a center conductor is arranged between the first medium ring and the second medium ring.
Further, the cross sections of the first ferrite and the second ferrite parallel to the bottom surface of the groove are in a truncated triangle shape and are the same in size.
Further, a first magnetic homogenizing sheet is arranged below the first medium ring, and a second magnetic homogenizing sheet is arranged above the second medium ring.
Further, three sides of the first ferrite and the second ferrite are respectively provided with a wave absorbing strip.
Further, the wave absorbing strip is carbonyl iron wave absorbing strip.
Further, the device further comprises a metal plate, wherein the metal plate covers the first groove and the fourth groove, and the upper cover plate and the lower cover plate are matched to fix the whole device.
Further, the metal plate comprises a magnetic circuit clamping plate and two magnetic circuit baffles, the magnetic circuit clamping plate is U-shaped and covers the first groove and the fourth groove, the magnetic circuit baffles are symmetrically arranged left and right, and the magnetic circuit baffles are assembled and connected with the side faces of the upper cover plate and the lower cover plate.
Further, the metal plate is an iron nickel-plated metal plate.
Further, the central conductor extends in Y-shaped mode to three directions, and each direction is provided with a transmission port.
Further, the magnetic circuit clamping plate, the magnetic circuit baffle plate and the output port are all assembled and connected with the upper cover plate and the lower cover plate through bolts.
The invention has the beneficial effects that: the invention provides a low-temperature-resistant broadband circulator, which is designed by forming a magnetic circuit through an aluminum nickel cobalt magnet and a medium ring, and simultaneously utilizing triangular ferrite and a wave-absorbing material arranged on the side edge of the ferrite to widen the working bandwidth, and improving the low-temperature performance of the broadband circulator under the synergistic effect of the ferrite, the aluminum nickel cobalt magnet and the medium ring magnetic circuit, wherein at the limit temperature (-196 ℃), the data index meets the requirement, the isolation degree of forward propagation loss is less than or equal to 0.5dB, and the isolation degree of reverse propagation loss and return loss are both more than or equal to 18dB.
Drawings
FIG. 1 is an exploded view of a low temperature resistant broadband circulator of the present invention;
FIG. 2 is an assembly diagram of a low temperature resistant broadband circulator according to the invention
FIG. 3 is a top view of a triangular ceramic ring ferrite of the low temperature resistant broadband circulator of the invention;
FIG. 4 is a graph of test data for a delta ceramic ring ferrite of a low temperature resistant broadband circulator of the invention;
FIG. 5 is a top view of a circular ceramic ring ferrite of a low temperature resistant wideband circulator of the invention;
FIG. 6 is a graph of test data for a circular ceramic ring ferrite of a low temperature resistant wideband circulator of the present invention;
FIG. 7 is a graph of test data of a low temperature resistant broadband circulator without a wave absorbing device according to the present invention;
FIG. 8 is a graph of test data of an assembled wave absorbing device of the low temperature resistant broadband circulator of the invention;
fig. 9 is a diagram of the total assembly test data of a low temperature resistant broadband circulator of the invention;
FIG. 10 is a general diagram of a positioning fixture for a low temperature resistant broadband circulator of the invention;
FIG. 11 is a schematic diagram of the operation condition of a positioning tool of the low-temperature-resistant broadband circulator of the invention;
FIG. 12 is a top view of the operating conditions of a positioning tool for a low temperature resistant broadband circulator of the invention;
description of the reference numerals:
1. an upper cover plate; 2. a lower cover plate; 3. a first magnet; 4. a first dielectric ring; 5. a first ferrite; 6. a second ferrite; 7. a second magnet; 8. a second dielectric ring; 9. a center conductor; 10. a first magnetic homogenizing sheet; 11. a second magnetic homogenizing sheet; 12. a wave absorbing strip; 13. a magnetic circuit clamping plate; 14. a magnetic circuit baffle; 15. a transmission port.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 and 2, a low temperature resistant broadband circulator is characterized by comprising an upper cover plate 1 and a lower cover plate 2 which are oppositely arranged, wherein a first groove is formed on one surface of the upper cover plate 1, which is opposite to the lower cover plate 2, a second groove is formed on one surface of the upper cover plate 1, which is opposite to the lower cover plate 2, a third groove is formed on one surface of the lower cover plate 2, which is opposite to the upper cover plate 1, and a fourth groove is formed on one surface of the lower cover plate 2, which is opposite to the upper cover plate 1;
a first magnet 3 and a first medium ring 4 are arranged in the first groove;
a first ferrite 5 is arranged in the second groove;
a second ferrite 6 is arranged in the third groove;
a second magnet 7 and a second medium ring 8 are arranged in the fourth groove;
the first magnet 3 and the second magnet 7 are alnico magnets, the first ferrite 5 and the second ferrite 6 are ceramic ring ferrites, and a center conductor 9 is arranged between the first dielectric ring 4 and the second dielectric ring 8.
From the above description, in order to improve the stability of the circulator under the low-temperature working condition, the magnetic circuit design is completed by specially selecting the alnico magnet with good temperature stability coefficient and matching with the medium ring, so as to form the magnetic field required by the circulator to work under the low-temperature working condition.
Further, the cross sections of the first ferrite 5 and the second ferrite 6 parallel to the bottom surface of the groove are in a truncated triangle shape and have the same size.
Further, a first magnetic homogenizing sheet 10 is arranged below the first medium ring 4, and a second magnetic homogenizing sheet 11 is arranged above the second medium ring 8.
As can be seen from the above description, as shown in fig. 3 to 6, in order to expand the working bandwidth of the circulator and reduce the volume of the circulator, through experimental tests, the conventional circular ceramic ring ferrite is designed into a triangular ceramic ring ferrite, and a magnetic homogenizing sheet is arranged below the dielectric ring (at the bottom of the groove), so as to stabilize the magnetic field, and the data of the circular ceramic ring ferrite and the triangular ceramic ring ferrite are compared with the following table:
further, three sides of the first ferrite 5 and the second ferrite 6 are provided with a wave absorbing strip 12.
Further, the wave absorbing strip 12 is carbonyl iron wave absorbing strip.
From the above description, as shown in fig. 7 to 8, the performance of the circulator meets a certain bandwidth through simulation within the bandwidth range of 4-8GHz under the cooperation of the design of the central conductor circuit and the ferrite, but the low frequency and the high frequency have cut-off phenomenon, the index and the bandwidth do not meet the requirements, after carbonyl iron is added to the edge of the ferrite of the triangular ceramic ring, the central conductor circuit is adjusted, and the low frequency and the high frequency of the circulator can be normally circulated through test, so that the index meets the requirements. The carbonyl iron has the advantages of high saturation magnetization intensity, high magnetic conductivity, wide wave absorbing frequency band, good wave absorbing effect and the like.
Further, the device further comprises a metal plate, wherein the metal plate covers the first groove and the fourth groove, and the whole device is fixed by matching the upper cover plate 1 and the lower cover plate 2.
Further, the metal plate comprises a magnetic circuit clamping plate 13 and two magnetic circuit clamping plates 14, the magnetic circuit clamping plate 13 is U-shaped and covers the first groove and the fourth groove, the magnetic circuit clamping plates 14 are arranged symmetrically left and right, and the magnetic circuit clamping plates 14 are assembled and connected with the side faces of the upper cover plate 1 and the lower cover plate 2.
Further, the metal plate is made of iron and nickel plating.
As can be seen from the above description, in order to stabilize the magnetic circuit and protect the internal structure, the iron-nickel plated metal plate cladding device is designed to mainly clad the first groove and the fourth groove with the U-shaped magnetic circuit clamping plate 13, fix the positions of the alnico magnet, the dielectric ring and the magnetic homogenizing plate, and simultaneously increase and close the magnetic circuit of the circulator with the iron-nickel plated material; in addition, the magnetic circuit clamping plate 14 is designed to laterally fix the upper and lower cover plates 2.
Further, the central conductor 9 extends in Y-shape in three directions, and each direction is provided with a transmission port 15.
Further, the magnetic circuit clamping plate 13, the magnetic circuit clamping plate 14 and the output port 15 are assembled and connected with the upper cover plate 1 and the lower cover plate 2 through bolts.
As can be seen from the above description, the central conductor 9 is connected to the output port 15 in three directions, the form of the joint being selected from SMAK or SMA, and is connected to the whole system by the joint; in addition, for convenience of assembly, the magnetic circuit clamping plate 13, the magnetic circuit clamping plate 14 and the output port 15 are all assembled and connected with the upper and lower cover plates 2 through bolts.
The first embodiment of the invention is as follows:
referring to fig. 1 to 9, a low temperature resistant broadband circulator includes an upper cover plate and a lower cover plate that are disposed opposite to each other, wherein a first groove is disposed on a surface of the upper cover plate facing away from the lower cover plate, and a second groove is disposed on a surface of the upper cover plate facing toward the lower cover plate; a third groove is formed in one surface of the lower cover plate, which faces the upper cover plate, and a fourth groove is formed in one surface of the lower cover plate, which faces away from the upper cover plate; a first magnet and a first medium ring are arranged in the first groove; a first ferrite is arranged in the second groove; a second ferrite is arranged in the third groove; a second magnet and a second medium ring are arranged in the fourth groove; the first magnet and the second magnet are made of alnico, and a center conductor is arranged between the first medium ring and the second medium ring. In this embodiment, in order to improve stability of the circulator in low-temperature working conditions, a magnetic circuit design is completed by specially selecting an alnico magnet with a good temperature stability coefficient and matching with a medium ring, a magnetic field required by the circulator in low-temperature working conditions is formed, and under the action of the magnetic circuit, a ceramic ring ferrite generates gyromagnetic characteristics to control electromagnetic waves to transmit along a certain circulating direction, so that independent functions are achieved between an output end and a load of a high-frequency power amplifier.
The second embodiment of the invention is as follows: referring to fig. 1 to 9, in the base of embodiment 1, a ceramic ring ferrite is designed to be triangular, a first magnetic homogenizing sheet is arranged below a first dielectric ring, a second magnetic homogenizing sheet is arranged above a second dielectric ring, and a carbonyl iron wave absorbing device is arranged on the side surface of the triangular ceramic ferrite.
In this embodiment, in order to expand the working bandwidth of the circulator and reduce the volume of the circulator, through experimental tests, the conventional circular ceramic ring ferrite is designed into a triangular ceramic ring ferrite, and a magnetic homogenizing sheet is arranged below the medium ring (at the bottom of the groove), so as to stabilize the magnetic field. Besides, by means of instrument test, the ferrite magnetic moment MS=1800/4pi (kA/m) at 25 ℃, the ferrite magnetic moment MS=2800/4pi (kA/m) at 196 ℃ and experimental simulation, in the bandwidth range of 4-8GHz, the performance of the circulator meets a certain working bandwidth under the cooperation of the design of a central conductor circuit and ferrite, but the cut-off phenomenon exists between low frequency and high frequency, the index and bandwidth do not meet the requirements, after carbonyl iron is added on the edge of the ferrite of the triangular ceramic ring, the central conductor circuit is adjusted until the low frequency and the high frequency of the circulator can normally circulate, and the index meets the requirements.
The third embodiment of the invention is as follows: referring to fig. 1 to 9, on the basis of the second embodiment, a cladding metal plate is disposed on the outer sides of the upper and lower cover plates, and includes a magnetic circuit clamping plate made of iron and nickel plating and two magnetic circuit baffles, wherein the magnetic circuit clamping plate is in a U shape and covers the first groove and the fourth groove, and is used for fixing the alnico magnet, the dielectric ring and the magnetic homogenizing plate, the magnetic circuit baffles are used for providing a limiting effect on the side surfaces of the upper and lower cover plates, and meanwhile, the iron and nickel plating material increases and closes the magnetic circuit of the circulator. In addition, the central conductor is connected with the transmission port in three directions, the joint form can be an SMAK or SMA joint, the central conductor is connected with the whole system through the joint, and meanwhile, for convenient assembly, the magnetic circuit clamping plate, the magnetic circuit baffle and the output port are all assembled and connected with the upper cover plate and the lower cover plate through bolts.
According to the circulator, through the matching design of ferrite, an alnico magnet and a medium ring magnetic circuit, the working temperature of the circulator can reach-196 ℃, and the carbonyl iron is used as a wave absorbing material to expand the working bandwidth, and the circulator is simulated in the range of 4-8GHz, so that 66% of the working bandwidth (the real frequency is 4-8GHz, the center frequency F0, the initial frequency F0-2GHz and the termination frequency F0+2 GHz) is met, and the technical indexes are shown in the following table:
the fourth embodiment of the invention is as follows: as shown in fig. 10 to 12, the assembly positioning tool applied to the second embodiment and the third embodiment comprises a base, a groove plate, a positioning block and a pin from bottom to top; the working principle is that the upper cover plate is put into the groove plate, the positioning block is fixed on the groove plate by the pin column to press the upper cover plate, and then the upper cover plate is put into the groove plate in sequence by matching with the positioning clamping groove: the positioning assembly comprises a triangular ceramic ring ferrite, a central conductor, a triangular ceramic ring ferrite and a lower cover plate, wherein the upper cover plate and the lower cover plate are locked after the positioning is completed, a pin is finally pulled out, and a positioning block is moved away from three directions to complete the positioning assembly.
In summary, the invention provides a low temperature resistant broadband circulator, a magnetic circuit design is formed by an alnico magnet and a dielectric ring, meanwhile, triangular ferrite and a side edge of the ferrite are utilized to set up a wave absorbing strip for widening the working bandwidth, and the low temperature performance of the broadband circulator is improved under the synergistic effect of the ferrite, the alnico magnet and the dielectric ring magnetic circuit, at the limit temperature (-196 ℃), the data index meets the requirement, the isolation of forward propagation loss is less than or equal to 0.5dB, and the isolation of reverse propagation loss and return loss are both more than or equal to 18dB.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (10)
1. The low-temperature-resistant broadband circulator is characterized by comprising an upper cover plate and a lower cover plate which are oppositely arranged, wherein a first groove is formed in one surface of the upper cover plate, which is opposite to the lower cover plate, a second groove is formed in one surface of the upper cover plate, which is opposite to the lower cover plate, a third groove is formed in one surface of the lower cover plate, which is opposite to the upper cover plate, and a fourth groove is formed in one surface of the lower cover plate, which is opposite to the upper cover plate;
a first magnet and a first medium ring are arranged in the first groove;
a first ferrite is arranged in the second groove;
a second ferrite is arranged in the third groove;
a second magnet and a second medium ring are arranged in the fourth groove;
the first magnet and the second magnet are alnico magnets, the first ferrite and the second ferrite are ceramic ring ferrites, and a center conductor is arranged between the first medium ring and the second medium ring.
2. The low temperature resistant wideband circulator of claim 1 wherein said first ferrite and said second ferrite have a truncated triangle cross section parallel to the bottom surface of the groove and are of the same size.
3. The low-temperature-resistant broadband circulator of claim 2, wherein a first magnetic homogenizing sheet is arranged below the first medium ring, and a second magnetic homogenizing sheet is arranged above the second medium ring.
4. The low temperature resistant wideband circulator of claim 2 wherein three sides of said first ferrite and said second ferrite are each provided with a wave absorbing strip.
5. The low temperature resistant broadband circulator of claim 4 wherein said absorbing strip is a carbonyl iron absorbing strip.
6. The low temperature resistant broadband circulator of claim 1, further comprising a metal plate covering the first recess and the fourth recess, the metal plate being adapted to secure the entire device in cooperation with the upper cover plate and the lower cover plate.
7. The low-temperature-resistant broadband circulator of claim 6, wherein the metal plate comprises a magnetic circuit clamping plate and two magnetic circuit baffles, the magnetic circuit clamping plate is U-shaped and covers the first groove and the fourth groove, the magnetic circuit baffles are arranged symmetrically left and right, and the magnetic circuit baffles are connected with the side faces of the upper cover plate and the lower cover plate in an assembling mode.
8. The low temperature resistant broadband circulator of claim 7, wherein said metal plate is an iron nickel plated metal plate.
9. The low temperature resistant wideband circulator of claim 8 wherein said center conductor extends in three directions in a Y-shape, each direction having a transmission port.
10. The low temperature resistant broadband circulator of claim 9, wherein the magnetic circuit clamping plate, the magnetic circuit baffle and the output port are all assembled and connected with the upper cover plate and the lower cover plate through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310171911.XA CN116417767A (en) | 2023-02-21 | 2023-02-21 | Low-temperature-resistant broadband circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310171911.XA CN116417767A (en) | 2023-02-21 | 2023-02-21 | Low-temperature-resistant broadband circulator |
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| Publication Number | Publication Date |
|---|---|
| CN116417767A true CN116417767A (en) | 2023-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310171911.XA Pending CN116417767A (en) | 2023-02-21 | 2023-02-21 | Low-temperature-resistant broadband circulator |
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| Country | Link |
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| CN (1) | CN116417767A (en) |
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- 2023-02-21 CN CN202310171911.XA patent/CN116417767A/en active Pending
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