CN111509347A

CN111509347A - Similar coaxial port surface-mounted circulator

Info

Publication number: CN111509347A
Application number: CN202010542684.3A
Authority: CN
Inventors: 胡艺缤; 闫欢; 张远; 尹久红; 丁敬磊; 冯楠轩
Original assignee: CETC 9 Research Institute
Current assignee: CETC 9 Research Institute
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-08-07

Abstract

The invention discloses a quasi-coaxial port surface-mounted circulator, which belongs to the technical field of microwave components and comprises a permanent magnet (1), a ceramic plate (2), a ferrite substrate (3) and an iron bottom plate (4) which are sequentially arranged from top to bottom, wherein a circuit (6) is arranged on the surface of the ferrite substrate (3), the quasi-coaxial surface-mounted circulator also comprises quasi-coaxial surface-mounted ports (5), a circuit (6) and metallized through holes (7), wherein the quasi-coaxial surface-mounted ports (5) are arranged at the lower end of the ferrite substrate (3) and are symmetrically arranged, and the metallized through holes (7) are arranged on the ferrite substrate (3); the invention expands the surface-mounted port form of the surface-mounted circulator, and the proposed similar coaxial surface-mounted port circulator has a simple structure in structural form and is easy to realize in process; the matching design between the micro-strip circuit and the surface-mounted port can be realized at multiple positions of the micro-strip circuit through the metallized through holes, and the miniaturization design of the surface-mounted circulator is easier to meet the development trend of multilayer interconnection of mounting substrates of a whole system.

Description

Similar coaxial port surface-mounted circulator

Technical Field

The invention relates to the technical field of microwave components, in particular to a surface-mounted circulator with a similar coaxial port.

Background

The circulator is an important basic device in microwave engineering, is widely applied to various civil and military equipment such as civil communication, microwave measurement, radar, communication, electronic countermeasure, aerospace and the like, is mainly used for realizing signal transceiving sharing in system equipment and solves the problems of interstage isolation and the like.

With the development trend of miniaturization and integration of weaponry and electronic systems, surface-mounted circulators have a very important position in the development of various weaponry and electronic systems due to the characteristics of small size, light weight and easy integration. The surface-mounted circulator is a surface-mounted mounting mode, and is a main mode for the future integrated assembly of the circulator and a system.

A typical structure of a conventional surface-mounted circulator is shown in fig. 1, and the conventional surface-mounted circulator sequentially includes an upper shielding plate 8, a permanent magnet 1, a ceramic plate 2, a ferrite substrate 3, a circuit matching hole (i.e., a metalized via hole 7), a lower shielding plate 9 and a surface-mounted port 10 from top to bottom, and a signal is guided to the back of a device through the circuit matching hole (i.e., the metalized via hole 7) on the basis of the conventional microstrip circulator to form the surface-mounted port 10 in a coplanar waveguide-like form. In fig. 1, a ferrite substrate 3 is a key functional material for realizing the loop performance of the device; the permanent magnet 1 is used as an external magnetic field to magnetize the ferrite substrate 3, and is the key point of the device operation. Go up shield plate 8 and shield plate 9 down and can realize a more even closed magnetic circuit, can promote the electrical property index of device, the person of facilitating the use simultaneously presss from both sides the clamp of getting the device in assembling process.

In the conventional surface-mount circulator, the surface-mount port thereof may be referred to as a surface-mount port 10 of the coplanar waveguide, which has the following problems:

1. the structure form is complex, the port processing difficulty is high, and the product welding and assembling difficulty is high;

2. the product is not flexible and changeable in miniaturization design;

3. the user can only select the mounting substrate for coplanar waveguide transmission during mounting, which is not in line with the development direction of multilayer interconnection of signal transmission substrates inside the current electronic system.

Disclosure of Invention

The present invention is directed to a surface mount circulator with a coaxial port to solve the above problems.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a kind of coaxial port table pastes circulator, includes that permanent magnet, potsherd, ferrite substrate, iron bottom plate, class coaxial table paste port, circuit and metallization via hole, wherein permanent magnet, potsherd, ferrite substrate and iron bottom plate are from last to arranging down in proper order, the circuit sets up in ferrite substrate surface, class coaxial table pastes the port and sets up in ferrite substrate lower extreme and symmetry arrangement, the metallization via hole sets up on the ferrite substrate.

As a preferred technical scheme: the coaxial surface-mounted ports are three and distributed in a regular triangle.

As a preferred technical scheme: the thickness of the iron bottom plate is 0.2-0.3mm, and solder balls are implanted at the middle signal transmission position of the quasi-coaxial surface-mounted port.

Compared with the prior art, the invention has the advantages that: the surface-mounted port similar to the same shaft is adopted, the manufacturing process of the surface-mounted structure is simpler, and meanwhile, the transmission mode of the structure can realize better matching of a surface-mounted device and a whole system and signal transmission.

The invention expands the surface-mounted port form of the surface-mounted circulator, and the proposed similar coaxial surface-mounted port circulator has a simple structure in structural form and is easy to realize in process; the surface-mounted port form can realize the matching design with the surface-mounted port at a plurality of positions of the microstrip circuit through metallized through holes, and is easier for the miniaturization design of the surface-mounted circulator; the surface-mounted ports similar to the coaxial are more in line with the development trend of multilayer interconnection of mounting substrates of the whole system.

Drawings

FIG. 1 is a schematic diagram of a conventional surface-mount circulator;

FIG. 2 is a schematic structural diagram of a surface-mount circulator of the present invention;

FIG. 3 is a schematic view of a quasi-coaxial surface mount port of the present invention;

fig. 4 is a schematic front view of the present invention.

In the figure: 1. a permanent magnet; 2. a ceramic plate; 3. a ferrite substrate; 4. an iron bottom plate; 5. a quasi-coaxial surface-mounted port; 6. a circuit; 7. metallizing the via hole; 8. an upper shield plate; 9. a lower shield plate; 10. a surface mount port.

Detailed Description

The invention will be further explained with reference to the drawings.

Example (b):

referring to fig. 2, the quasi-coaxial port surface-mounted circulator comprises a permanent magnet 1, a ceramic plate 2, a ferrite substrate 3, an iron bottom plate 4, quasi-coaxial surface-mounted ports 5, a circuit 6 and metalized via holes 7, wherein the permanent magnet 1, the ceramic plate 2, the ferrite substrate 3 and the iron bottom plate 4 are sequentially arranged from top to bottom, the circuit 6 is arranged on the surface of the ferrite substrate 3, the quasi-coaxial surface-mounted ports 5 are arranged at the lower end of the ferrite substrate 3 and are symmetrically arranged, and the metalized via holes 7 are arranged on the ferrite substrate 3;

the process of metallizing the via hole 7 is to process a through hole on the ferrite according to the design by laser or mechanical mode, and then metallize the via hole on the ferrite by adopting thin film process or thick film process to ensure that the transmission signal is transmitted from the surface of the device to the back of the device;

in this embodiment, three quasi-coaxial surface-mounted ports 5 are distributed in a regular triangle;

as known in the art, processing the circuit 6 on the surface of the ferrite substrate 3 by a thin film magnetron sputtering process or a thick film printing process is the key for realizing the circulating performance of the circulator; signals transmitted on the surface of the ferrite substrate 3 are conducted to the back surface of the ferrite substrate 3 through the metalized through holes 7 to form a surface-mounted port;

the invention mainly relates to a surface-mounted port, which is in a coaxial-like port form, is different from the port form of the prior micro-strip surface-mounted device, the transmission modes of signals at the ports are different, and the port form is more convenient for integrating the device into a whole machine system; in addition, the invention also discloses a process technology for forming the coaxial surface-mounted port by adopting a ball-mounting process.

The invention provides a novel quasi-coaxial surface-mounted port 5, the signal feeding mode of which is the same as that of a coaxial line, a permanent magnet 1 and an iron bottom plate 4 jointly form an external magnetic circuit of a device, the saturation magnetization work of a ferrite substrate is ensured, and the necessary condition of realizing the annular performance of the device is also met;

as shown in fig. 4, the circulator of the present invention realizes matching between the circuit 6 and the back surface quasi-coaxial surface-mounted port 5) through the metalized via hole 7; because the form of the coaxial surface-mounted port 5 is more regular, the structure is simpler, the matching of the metallized through holes 7 at a plurality of positions in the circuit 6 can be flexibly realized, the matching is flexible and various, and the miniaturization of the device is easier to realize.

Specifically, in the whole system, for more efficient integration, the substrate is manufactured by adopting processes such as L TCC/HTCC and the like to carry out three-dimensional routing in each direction, so that the space can be saved, the miniaturization and integration of the system are realized, signals are transmitted inside the substrate in a metal via hole mode in the system substrate, and the quasi-coaxial surface-mounted port provided by the invention is assembled with the system substrate in a direct connection mode close to the metal via hole of the system, so that the transmission space is greatly saved, and the size of the system is reduced.

As shown in fig. 3, the circulator-like coaxial surface-mount technology of the present invention is simpler and easier to manufacture: if the thickness of the product iron bottom plate 4 is 0.2-0.3mm, the structure form of the coaxial surface-mounted port 5 can be realized by adopting a solder ball implanting mode at the middle signal transmission part of the port; if the thickness of the iron base plate 4 is 0.1mm, no processing can be carried out on the middle signal transmission part, and the solder climbing height exceeds 0.1mm in the use and installation of the device, so that the device can be well connected with the metalized through hole 7 of the ferrite substrate 3.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a coaxial port table of kind pastes circulator which characterized in that: including permanent magnet (1), potsherd (2), ferrite substrate (3), iron bottom plate (4), class coaxial table subsides port (5), circuit (6) and metallization via hole (7), wherein permanent magnet (1), potsherd (2), ferrite substrate (3) and iron bottom plate (4) are arranged from last to down in proper order, circuit (6) set up in ferrite substrate (3) surface, class coaxial table pastes port (5) and sets up in ferrite substrate (3) lower extreme and symmetry and arranges, metallization via hole (7) set up on ferrite substrate (3).

2. The quasi-coaxial port surface-mount circulator of claim 1, wherein: the number of the similar coaxial surface-mounted ports (5) is three, and the ports are distributed in a regular triangle shape.

3. The quasi-coaxial port surface-mount circulator of claim 1, wherein: the thickness of the iron bottom plate (4) is 0.2-0.3mm, and a solder ball is implanted in the middle signal transmission position of the similar coaxial surface-mounted port (5).