WO2019095791A1

WO2019095791A1 - Microwave ferrite device

Info

Publication number: WO2019095791A1
Application number: PCT/CN2018/103591
Authority: WO
Inventors: 熊飞; 张伟
Original assignee: 深圳市华扬通信技术有限公司
Priority date: 2017-11-15
Filing date: 2018-08-31
Publication date: 2019-05-23
Also published as: CN207743373U

Abstract

Disclosed is a microwave ferrite device, comprising a cavity and a magnetic circuit assembly, wherein the magnetic circuit assembly comprises a central conductor, and further comprises a radio frequency load chip, the radio frequency load chip being fixed onto the cavity and being electrically connected to one end of the central conductor. Additionally providing the radio frequency load chip enables the microwave ferrite device to be capable of bearing an input of a higher power, and additionally providing the radio frequency load chip facilitates the adjustment of an isolation degree by a worker, significantly reduces the debugging difficulty of the microwave ferrite device, improves the debugging speed, and is beneficial for improving the consistency of the microwave ferrite device. The present invention has a simple structure and is easy to process. Providing a load cover can fully and effectively protect a load. Providing a dielectric block is beneficial for improving the electrical properties of the microwave ferrite device. A lower housing made of red copper can not only have the function of fixing the magnetic circuit assembly and the radio frequency load chip, but also have the function of cooling the radio frequency load chip.

Description

Microwave ferrite device

Technical field

The present invention relates to the field of circulator/isolator technology, and more particularly to a microwave ferrite device.

Background technique

Microwave ferrite devices (such as: isolators, circulators) play a role in looping, isolation, amplitude modulation, etc. in microwave circuits, mainly used in military radar systems and communications.

With the rapid development of communication technology and market, the requirements for microwave circulators and isolators are getting higher and higher, especially the power requirements are getting higher and higher. In the past, X-band isolators used carbonyl iron materials to adjust the isolation, but Its withstand power is small, the difficulty of debugging and the consistency are poor, and it can not fully meet the requirements.

technical problem

The technical problem to be solved by the present invention is to provide a microwave ferrite device capable of withstanding large power and being easy to debug.

Technical solution

In order to solve the above technical problem, the technical solution adopted by the present invention is: a microwave ferrite device including a cavity and a magnetic circuit assembly, the magnetic circuit assembly including a center conductor, and a radio frequency load chip, the radio frequency load chip It is fixed to the cavity and electrically connected to one end of the center conductor.

Further, the cavity includes a connected upper casing and a lower casing, the upper casing is provided with a first through hole, and the lower casing is provided with a second through hole, and the first through hole and the second through hole are common a central shaft is disposed, the magnetic circuit component is received in the first through hole and the second through hole; and a side of the lower casing adjacent to the upper casing is provided with three slots corresponding to the three ends of the center conductor The slot is connected to the inner peripheral wall of the lower case and the outer peripheral wall of the lower case, and the radio frequency load chip is fixed on the lower case.

Further, the lower casing has a carrying platform, and the carrying platform is located at an end of the slot away from the second through hole, and the radio frequency load chip is fixed on the carrying platform.

Further, a load cover is further included, and the load cover is fixedly connected to the carrier and covers the RF load chip.

Further, the bottom of the slot has a through hole disposed along the axial direction of the second through hole, and the through hole is provided with a tuning screw, and the tuning screw is adjacent to one end of the upper casing and the end of the center conductor connection.

Further, the magnetic circuit assembly includes a first magnetic circuit cover plate, a first permanent magnet, a first magnetic homogenizer, a lower ferrite, an upper ferrite, a second homogenized magnet, and a second permanent magnet stacked in sequence. And a second magnetic circuit cover, the central conductor is located between the lower ferrite and the upper ferrite, the first magnetic circuit cover is fixedly connected with the lower casing and blocks one end of the second through hole, the second magnetic The road cover is fixedly connected to the upper casing and blocks one end of the first through hole.

Further, the outer portion of the lower ferrite is uniformly provided with a plurality of dielectric blocks, and the dielectric block is located between the central conductor and the first homogenized sheet.

Further, the material of the dielectric block is polytetrafluoroethylene.

Further, the height of the dielectric block is not greater than the thickness of the lower ferrite.

Further, the material of the lower casing is copper.

Beneficial effect

The invention has the beneficial effects that: the radio frequency load chip is added on the microwave ferrite device, so that the microwave ferrite device can withstand the input of a large power; and the RF load chip is added to facilitate the adjustment of the isolation by the employee, and the isolation is greatly reduced. The debugging difficulty of the microwave ferrite device improves the debugging speed, which is beneficial to improve the consistency of the microwave ferrite device; the structure is simple and the processing is convenient.

DRAWINGS

1 is a schematic view showing the overall structure of a microwave ferrite device according to a first embodiment of the present invention.

Label description:

1. Center conductor; 2. End; 3. RF load chip; 4. Upper housing; 5. Lower housing;

6, the first through hole; 7, the second through hole; 8, the slot; 9, the carrying platform; 10, the load cover;

11. a through hole; 12, a tuning screw; 13, a first magnetic circuit cover; 14, a first permanent magnet;

15. The first magnetic sheet; 16, the lower ferrite; 17, the upper ferrite; 18, the second magnetic sheet;

19. A second permanent magnet; 20, a second magnetic circuit cover; 21, a dielectric block.

Embodiments of the invention

In order to explain the technical contents, the objects and effects achieved by the present invention in detail, the embodiments will be described below in conjunction with the accompanying drawings.

The most critical idea of the present invention is to add an RF load chip that is electrically connected to one end of the center conductor.

Referring to FIG. 1, a microwave ferrite device includes a cavity and a magnetic circuit assembly. The magnetic circuit assembly includes a center conductor 1 and further includes a radio frequency load chip 3, and the radio frequency load chip 3 is fixed in the cavity. It is electrically connected to one end 2 of the center conductor 1.

The structural principle of the present invention is briefly described as follows: During the operation of the microwave ferrite device, the RF load chip 3 shares a portion of the input power, thereby increasing the upper limit of the power that the microwave ferrite device can withstand.

It can be seen from the above description that the utility model has the advantages that the radio frequency load chip is added on the microwave ferrite device, so that the microwave ferrite device can withstand the input of a large power; and the RF load chip is added to facilitate the staff to adjust the isolation. Degree, greatly reducing the difficulty of debugging the microwave ferrite device, improving the debugging speed, and improving the consistency of the microwave ferrite device; the structure is simple and the processing is convenient.

Further, the cavity includes a connected upper casing 4 and a lower casing 5, the upper casing 4 is provided with a first through hole 6, and the lower casing 5 is provided with a second through hole 7, a first through hole 6 is disposed coaxially with the second through hole 7 , the magnetic circuit assembly is received in the first through hole 6 and the second through hole 7; and the side of the lower case 5 near the upper case 4 is provided with three centers The three ends of the conductor 1 are correspondingly slotted 8 , the slot 8 is connected to the inner peripheral wall of the lower casing 5 and the outer peripheral wall of the lower casing 5 , and the radio frequency load chip 3 is fixed on the lower casing 5 .

Further, the lower casing 5 has a carrying platform 9 , and the loading platform 9 is located at an end of the slot 8 away from the second through hole 7 , and the radio frequency load chip 3 is fixed on the carrying platform 9 .

As can be seen from the above description, the RF load chip is electrically connected to the center conductor at a slot. Preferably, the RF is applied to the chip and the end of the center conductor is soldered.

Further, a load cover 10 is further included, and the load cover 10 is fixedly connected to the carrier 9 and covers the RF load chip 3.

As can be seen from the above description, the load cover can fully and effectively protect the load.

Further, the bottom of the slot 8 has a through hole 11 disposed axially along the second through hole 7. The through hole 11 is provided with a tuning screw 12, and the tuning screw 12 is adjacent to one end of the upper housing 4 The ends 2 of the center conductor 1 are connected.

Further, the magnetic circuit assembly includes a first magnetic circuit cover 13 , a first permanent magnet 14 , a first magnetic flux plate 15 , a lower ferrite 16 , an upper ferrite 17 , and a second magnetic flux plate stacked in sequence. 18. The second permanent magnet 19 and the second magnetic circuit cover 20 are located between the lower ferrite 16 and the upper ferrite 17, and the first magnetic circuit cover 13 is fixedly connected to the lower casing 5. One end of the second through hole 7 is blocked, and the second magnetic circuit cover 20 is fixedly connected to the upper case 4 and blocks one end of the first through hole 6.

Further, a plurality of dielectric blocks 21 are disposed on the outside of the lower ferrite 16 , and the dielectric block 21 is located between the central conductor 1 and the first homogenized sheet 15 .

Further, the material of the dielectric block 21 is polytetrafluoroethylene.

As can be seen from the above description, the provision of the dielectric block is advantageous for improving the electrical performance of the microwave ferrite device.

Further, the height of the dielectric block 21 is not greater than the thickness of the lower ferrite 16.

Further, the material of the lower casing 5 is copper.

It can be seen from the above description that the lower casing made of copper not only functions as a fixed magnetic circuit component and a radio frequency load chip, but also functions as a heat sink for the RF load chip, greatly improving the heat dissipation efficiency of the RF load chip and ensuring the microwave iron. High power implementation of oxygen devices.

Embodiment 1

Referring to FIG. 1, a first embodiment of the present invention is a microwave ferrite device including a cavity and a magnetic circuit assembly. The magnetic circuit assembly includes a center conductor 1 and a radio frequency load chip 3, the radio frequency load. The chip 3 is fixed to the cavity and is electrically connected to one end 2 of the center conductor 1.

Further, the cavity includes a connected upper casing 4 and a lower casing 5, the upper casing 4 is provided with a first through hole 6, and the lower casing 5 is provided with a second through hole 7, a first through hole 6 is disposed coaxially with the second through hole 7 , the magnetic circuit assembly is received in the first through hole 6 and the second through hole 7; and the side of the lower case 5 near the upper case 4 is provided with three centers The three ends of the conductor 1 are correspondingly slotted 8 , the slot 8 is connected to the inner peripheral wall of the lower casing 5 and the outer peripheral wall of the lower casing 5 , and the radio frequency load chip 3 is fixed on the lower casing 5 . The inner peripheral wall of the lower casing 5 is the peripheral wall of the second through hole 7.

Preferably, the lower casing 5 has a carrying platform 9 at an end of the slot 8 away from the second through hole 7, and the radio frequency load chip 3 is fixed on the carrying platform 9.

Optionally, the microwave ferrite device further includes a load cover 10 fixedly coupled to the carrier 9 and covering the RF load chip 3.

Specifically, the magnetic circuit assembly includes a first magnetic circuit cover 13 , a first permanent magnet 14 , a first magnetic flux plate 15 , a lower ferrite 16 , an upper ferrite 17 , and a second magnetic flux plate stacked in sequence. 18. The second permanent magnet 19 and the second magnetic circuit cover 20 are located between the lower ferrite 16 and the upper ferrite 17, and the first magnetic circuit cover 13 is fixedly connected to the lower casing 5. One end of the second through hole 7 is blocked, and the second magnetic circuit cover 20 is fixedly connected to the upper case 4 and blocks one end of the first through hole 6. Preferably, the first and second permanent magnets are samarium cobalt magnets.

Preferably, the bottom surface of the slot 8 is slightly lower than the upper surface of the carrier 9, so that the upper surface of the end 2 of the center conductor 1 located in the slot 8 can be coplanar with the upper surface of the carrier 9, thereby facilitating the radio frequency The welding of the load chip 3 to the tip 2 is performed.

In order to further improve the electrical performance of the microwave ferrite device, the outer portion of the lower ferrite 16 is uniformly provided with a plurality of dielectric blocks 21, and the dielectric block 21 is located between the central conductor 1 and the first uniform magnetic sheet 15. The material of the dielectric block 21 is polytetrafluoroethylene. Preferably, the height of the dielectric block 21 is not greater than the thickness of the lower ferrite 16. Similarly, a plurality of the dielectric blocks 21 may be uniformly disposed on the outside of the upper ferrite 17. In the present embodiment, three dielectric blocks 21 are respectively distributed on the outside of the lower ferrite 16 and the upper ferrite 17. In other embodiments, the lower ferrite 16 can also be selected to be placed in a dielectric ring made of polytetrafluoroethylene.

In order to improve the heat dissipation capability of the microwave ferrite device, the lower case 5 is made of copper. Further, the copper-made carrying platform 9 is further provided with a plurality of heat dissipation fins.

The RF load chip 3 is a radio frequency high power load chip.

In summary, the microwave ferrite device provided by the present invention is provided with a radio frequency load chip, so that the microwave ferrite device can withstand a large power input; and the RF load chip is added to facilitate the staff to adjust the isolation degree. The debugging difficulty of the microwave ferrite device is reduced, the debugging speed is improved, the consistency of the microwave ferrite device is improved, the structure is simple, and the processing is convenient; the load cover can be set to fully and effectively protect the load; It is beneficial to improve the electrical performance of the microwave ferrite device; the lower case made of copper not only functions as a fixed magnetic circuit component and a radio frequency load chip, but also functions as a heat sink for the RF load chip, greatly improving the RF load chip. The heat dissipation efficiency ensures the high power of the microwave ferrite device.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and equivalent transformations made by the description of the present invention and the contents of the drawings, or directly or indirectly applied in the related technical field, are included in the same. Within the scope of patent protection of the present invention.

Claims

A microwave ferrite device comprising a cavity and a magnetic circuit assembly, the magnetic circuit assembly comprising a center conductor, further comprising a radio frequency load chip fixed to the cavity and centered One end of the conductor is electrically connected.
The microwave ferrite device according to claim 1, wherein the cavity comprises an upper upper case and a lower case, the upper case is provided with a first through hole, and the lower case is provided with a first a two-way hole, the first through hole and the second through hole are disposed together with a central axis, the magnetic circuit component is received in the first through hole and the second through hole; and the lower case is disposed on one side of the upper case a slot corresponding to the three ends of the center conductor, the slot is connected to the inner peripheral wall of the lower case and the outer peripheral wall of the lower case, and the radio frequency load chip is fixed on the lower case.
The microwave ferrite device according to claim 2, wherein the lower casing has a carrying platform, and the carrying platform is located at an end of the slot away from the second through hole, and the RF load chip is fixed. On the carrier.
The microwave ferrite device according to claim 3, further comprising a load cover fixedly coupled to said stage and covering said radio frequency load chip.
The microwave ferrite device according to claim 2, wherein the bottom of the groove has a through hole disposed axially along the second through hole, and the through hole is provided with a tuning screw, the tuning screw An end adjacent to the upper casing is coupled to the end of the center conductor.
The microwave ferrite device according to claim 2, wherein said magnetic circuit assembly comprises a first magnetic circuit cover plate, a first permanent magnet, a first magnetic flux, a lower ferrite, and an upper layer which are sequentially stacked. a ferrite, a second homogenizer, a second permanent magnet and a second magnetic circuit cover, the central conductor is located between the lower ferrite and the upper ferrite, and the first magnetic circuit cover is fixed to the lower casing One end of the second through hole is connected and blocked, and the second magnetic circuit cover is fixedly connected to the upper case and blocks one end of the first through hole.
The microwave ferrite device according to claim 6, wherein the outer portion of the lower ferrite is uniformly provided with a plurality of dielectric blocks, and the dielectric block is located between the center conductor and the first magnetic homogenizer.
The microwave ferrite device according to claim 7, wherein the dielectric block is made of polytetrafluoroethylene.
The microwave ferrite device according to claim 7, wherein the height of the dielectric block is not greater than the thickness of the lower ferrite.
The microwave ferrite device according to claim 2, wherein the lower case is made of copper.