CN-121983768-A - High-power microwave ferrite device beneficial to magnetic shielding

CN121983768ACN 121983768 ACN121983768 ACN 121983768ACN-121983768-A

Abstract

The invention discloses a high-power microwave ferrite device beneficial to magnetic shielding, which comprises an upper aluminum cavity, a lower aluminum cavity, a heat conducting top cover, a heat conducting bottom cover, side plates, an upper cooling plate and a lower cooling plate. The upper aluminum cavity is provided with a first opening, the lower aluminum cavity is provided with a second opening, and the first opening and the second opening form a containing cavity for containing the functional core. The heat conduction top cap sets up in last aluminium chamber top and covers first trompil, and the heat conduction bottom sets up in lower aluminium chamber bottom and covers the second trompil. The side plates are arranged on the side walls of the upper aluminum cavity and the lower aluminum cavity and cover gaps between the upper aluminum cavity and the lower aluminum cavity. The upper cooling plate is arranged on the heat conduction top cover and is provided with a first liquid cooling pipeline, the lower cooling plate is arranged on the heat conduction bottom cover and is provided with a second liquid cooling pipeline communicated with the first liquid cooling pipeline, and cooling liquid is filled in the first liquid cooling pipeline and the second liquid cooling pipeline. High magnetic shielding effectiveness is achieved through the fully-closed aluminum cavity structure, efficient heat dissipation under high-power conditions is achieved through liquid cooling heat dissipation, and the technical problem that magnetic shielding and heat dissipation are mutually restricted is solved.

Inventors

Du dongxing
NI JING
PENG HUA
KANG KAI

Assignees

深圳市华扬通信技术有限公司

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. A high power microwave ferrite device for facilitating magnetic shielding, comprising: the upper aluminum cavity is provided with a first opening communicated with the top and the bottom of the upper aluminum cavity; the lower aluminum cavity is connected to the bottom of the upper aluminum cavity, a second opening communicated with the top and the bottom of the lower aluminum cavity is formed, the top of the second opening is aligned with the bottom of the first opening, the first opening and the second opening form a containing cavity, and the containing cavity is used for containing the functional core; the heat conduction top cover is arranged at the top of the upper aluminum cavity and covers the first opening; the heat conduction bottom cover is arranged at the bottom of the lower aluminum cavity and covers the second opening; The side plates are arranged on the side walls of the upper aluminum cavity and the side walls of the lower aluminum cavity and cover gaps between the upper aluminum cavity and the lower aluminum cavity; the upper cooling plate is arranged on the heat conduction top cover and is provided with a first liquid cooling pipeline; the lower cooling plate is arranged on the heat conduction bottom cover and is provided with a second liquid cooling pipeline communicated with the first liquid cooling pipeline, and cooling liquid is filled in the first liquid cooling pipeline and the second liquid cooling pipeline.
2. The high-power microwave ferrite device with magnetic shielding according to claim 1, wherein the upper cooling plate and/or the lower cooling plate are provided with heat dissipation fins.
3. The high-power microwave ferrite device facilitating magnetic shielding according to claim 1, wherein a sealant is arranged between the heat conducting top cover and the upper aluminum cavity, a sealant is arranged between the heat conducting bottom cover and the lower aluminum cavity, and a sealant is arranged between the side plate and the side wall of the upper aluminum cavity and between the side plate and the side wall of the lower aluminum cavity.
4. The high-power microwave ferrite device facilitating magnetic shielding according to claim 3, wherein the sealant is acetal solution.
5. The high-power microwave ferrite device beneficial to magnetic shielding according to claim 1, wherein one end of the first liquid cooling pipeline and one end of the second liquid cooling pipeline are respectively provided with a liquid cooling joint, the liquid cooling joints are used for connecting a hydraulic pump, and the other end of the first liquid cooling pipeline and the other end of the second liquid cooling pipeline are communicated through a circulating liquid cooling pipe.
6. The magnetically shielded high power microwave ferrite device of claim 1, wherein the first liquid cooling conduit is embedded in the upper cooling plate and/or the second liquid cooling conduit is embedded in the lower cooling plate.
7. The high-power microwave ferrite device for facilitating magnetic shielding according to claim 1, wherein the functional core comprises a lower filling sheet, a lower temperature patch, a lower permanent magnet, a lower magnetic homogenizing sheet, a lower supporting sheet, a lower ferrite, a lower dielectric film, a central conductor, an upper dielectric film, an upper ferrite, an upper supporting sheet, an upper magnetic homogenizing sheet, an upper permanent magnet, an upper temperature patch and an upper filling sheet which are sequentially stacked from bottom to top in the cavity.
8. The high-power microwave ferrite device beneficial to magnetic shielding according to claim 7, wherein an upper medium ring is arranged on the outer side of the upper ferrite and connected between an upper supporting sheet and an upper medium film, and a lower medium ring is arranged on the outer side of the lower ferrite and connected between the lower supporting sheet and a lower medium film.
9. The magnetically shielded high power microwave ferrite device of claim 7, wherein the center conductor is a double Y-junction structure.
10. The high-power microwave ferrite device for facilitating magnetic shielding according to claim 7 or 9, wherein the upper side and the lower side of the central conductor are respectively provided with silver plating layers.

Description

High-power microwave ferrite device beneficial to magnetic shielding Technical Field The invention relates to the technical field of microwave ferrite devices, in particular to a high-power microwave ferrite device beneficial to magnetic shielding. Background Microwave ferrite devices (including circulators, isolators, etc.) are key passive devices in modern microwave communication systems, and are widely used in the fields of radar, satellite communication, electronic countermeasure, high-end computing equipment, etc. With the development of microwave systems to high power, miniaturization and integration, the performance requirements of microwave ferrite devices are increasingly improved, wherein magnetic shielding performance and heat dissipation performance become two key factors for restricting the overall performance of the devices. In the prior art, the magnetic shielding design and the heat dissipation design of the microwave ferrite device have obvious technical contradiction. On one hand, in order to realize good magnetic shielding efficiency, a closed metal cavity structure is needed, external magnetic field interference is blocked and self magnetic field leakage is restrained by reducing gaps and openings, and on the other hand, heat generated by a device under high-power working conditions needs to be timely discharged through an effective heat dissipation channel, and air convection is severely limited by the closed structure, so that heat accumulation is caused. The structural requirements of the closed magnetic shield and the open heat dissipation are mutually opposite, so that the prior art is difficult to simultaneously meet the requirements of high magnetic shielding efficiency and high-power heat dissipation. Aiming at the magnetic shielding requirement, the prior art mostly adopts an open type or semi-open type shell structure, although the heat dissipation is facilitated, the magnetic shielding efficiency is usually lower than 20dB, the interference of an environment magnetic field and the magnetic field of adjacent devices cannot be effectively isolated, the distribution of the magnetic field in ferrite is disordered, the performance fluctuation of the devices is large, and the leakage of the magnetic field of the devices generates electromagnetic coupling interference on surrounding sensitive devices (such as a low-noise amplifier). Aiming at the heat dissipation requirement, the prior art mainly adopts an air cooling heat dissipation mode, and a vent hole or a heat dissipation groove is formed in the shell to enhance air convection. Meanwhile, the air cooling and radiating efficiency is limited, the radiating requirement of a high-power device is difficult to meet, uneven temperature distribution is easy to cause, the local temperature is too high, and the stability of the magnetic property of the permanent magnet and the magnetic conductivity of the ferrite is affected. Therefore, how to break through the technical bottleneck of mutual restriction of the magnetic shielding structure and the heat dissipation structure, develop a microwave ferrite device which has high magnetic shielding efficiency, high efficient heat dissipation capability and is suitable for high-power operation at the same time, and become the technical problem to be solved in the field. Disclosure of Invention The invention aims to solve the technical problem of realizing efficient heat dissipation under high power condition on the premise of not damaging the closed structure of the microwave ferrite device to keep high magnetic shielding efficiency. In order to solve the technical problems, the invention adopts the technical scheme that the high-power microwave ferrite device beneficial to magnetic shielding comprises: the upper aluminum cavity is provided with a first opening communicated with the top and the bottom of the upper aluminum cavity; the lower aluminum cavity is connected to the bottom of the upper aluminum cavity, a second opening communicated with the top and the bottom of the lower aluminum cavity is formed, the top of the second opening is aligned with the bottom of the first opening, the first opening and the second opening form a containing cavity, and the containing cavity is used for containing the functional core; the heat conduction top cover is arranged at the top of the upper aluminum cavity and covers the first opening; the heat conduction bottom cover is arranged at the bottom of the lower aluminum cavity and covers the second opening; The side plates are arranged on the side walls of the upper aluminum cavity and the side walls of the lower aluminum cavity and cover gaps between the upper aluminum cavity and the lower aluminum cavity; the upper cooling plate is arranged on the heat conduction top cover and is provided with a first liquid cooling pipeline; the lower cooling plate is arranged on the heat conduction bottom cover and is provided with a second liquid cooling pipeline comm