CN209961866U

CN209961866U - Novel test fixture of SMT microstrip circulator

Info

Publication number: CN209961866U
Application number: CN201920404470.2U
Authority: CN
Inventors: 魏巍; 何欣玙
Original assignee: CHENGDU ZHILI MICRO-TECH Co Ltd
Current assignee: CHENGDU ZHILI MICRO-TECH Co Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-01-17
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a novel test fixture of SMT microstrip circulator, including fixed cavity and printed circuit board, printed circuit board includes three secondary circuit and a main circuit, fixed cavity includes three curb plate and a bottom plate, the fixed two individual fixed blocks that are provided with on the bottom plate of fixed cavity, the fixed block symmetry sets up, and the welding has printed circuit board on the bottom plate of fixed cavity, be provided with the port hole on the curb plate of fixed cavity, the downthehole additional installation of port is equipped with test connector, test connector and printed circuit board's secondary circuit electric connection, still be provided with the fixed orifices around the port hole, have mixed simple structure, guarantee test effect's advantage, be applicable to the circulator field.

Description

Novel test fixture of SMT microstrip circulator

Technical Field

The utility model relates to a circulator technical field, concretely relates to novel test fixture of SMT microstrip circulator.

Background

In recent years, with the continuous improvement of the scientific and technological level and the more and more prosperous economic development in China, the microwave industry in China also has developed and utilized vigorously, wherein, the circulator is also a hotspot studied in recent years, and the circulator is a multi-port device which transmits incident waves entering any port of the circulator into the next port according to the direction sequence determined by the static bias magnetic field. A circulator is a non-reciprocal device with several ends. The high-frequency signal energy can be transmitted in one direction, and is divided into a micro-optical fiber and an electronic circulator, so that the high-frequency signal energy can be well applied to isolators, duplexers and reflection amplifiers. Smt (surface Mount technology) is the most popular technology and process in the electronic assembly industry. The traditional microstrip circulator is installed in a gold wire bonding mode, and a probe is used for contacting a port on the surface during testing, so that the testing can be completed. The microstrip circulator is made into an SMT form, port transmission is placed at the bottom of a product, normal test work cannot be completed by an original test tool, and a novel test tool needs to be searched to solve the problems.

Therefore, it is necessary to provide a novel testing tool for an SMT microstrip circulator, which has a simple structure and ensures the testing effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's is not enough, provides a mix simple structure, guarantees the novel test fixture of SMT microstrip circulator of test effect.

The purpose of the utility model is realized through the following technical scheme: the utility model provides a novel test fixture of SMT microstrip circulator, includes fixed cavity and printed circuit board, printed circuit board includes three secondary circuit and a main circuit, fixed cavity includes three curb plate and a bottom plate, the fixed two individual fixed blocks that are provided with on the bottom plate of fixed cavity, the fixed block symmetry sets up, and the welding has printed circuit board on the bottom plate of fixed cavity, be provided with the port hole on the curb plate of fixed cavity, the downthehole additional installation of port is equipped with test connector, test connector and printed circuit board's secondary circuit electric connection, still be provided with the fixed orifices around the port hole.

In the above scheme, for optimization, furthermore, the fixed block is L-shaped, and the corners of the fixed block are all subjected to arc treatment.

Furthermore, the surface layer of the fixed block is also provided with an anti-skid layer.

Furthermore, the three side plates and the bottom plate of the fixed cavity are integrally formed.

Further, the number of the fixing holes is 2-4.

Further, the test joint is an SMA joint.

The utility model has the advantages that: the utility model discloses a set up fixed cavity and printed circuit board to and be provided with the fixed block on the bottom plate of fixed cavity, after fixing SMT microstrip circulator, its three port below can direct contact with printed circuit board, thereby with test connector electric connection on the curb plate of fixed cavity, test connector is connected with external test equipment again, carry out the test work on next step, there are not complicated device and equipment, the simple and convenient easy operation of structure, test connector can be with circulator port direct electric connection, can guarantee the integrality of test, do not need the split circulator to accomplish test work directly; to sum up, the utility model relates to a simple structure guarantees the novel test fixture of SMT microstrip circulator of test effect.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a front view of a printed circuit board according to an embodiment of the present invention;

fig. 3 is a rear view of a printed circuit board according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an insertion position of an SMT circulator according to an embodiment of the present invention;

fig. 5 is a three-view diagram of the fixing cavity according to the embodiment of the present invention, in which a is a top view, B is a side view, and C is a rear view.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.

Examples

In this embodiment, the fixed mounting test joints are fixed by bolts, which is not shown in this embodiment, and this embodiment only shows a circular SMT microstrip circulator, and may also be applicable to a square SMT microstrip circulator.

As shown in fig. 1 to 5, a novel test fixture for an SMT microstrip circulator includes a fixed cavity 1 and a printed circuit board 2, where the printed circuit board 2 includes three sub-circuits 202 and a main circuit 201, and the three sub-circuits 202 extend to a side plate 102 of the fixed cavity 1 and are electrically connected to a test connector on the side plate 102;

the fixed cavity 1 comprises three side plates 102 and a bottom plate 101, two fixed blocks 3 are fixedly arranged on the bottom plate 101 of the fixed cavity 1, the fixed blocks 3 are symmetrically arranged and are provided with the fixed blocks 3, so that the circulator can be fixed to a certain extent, the testing is convenient, and the testing stability is improved.

The welding has printed circuit board 2 on the bottom plate 101 of fixed cavity 1, be provided with port hole 4 on the curb plate 102 of fixed cavity 1, install additional in port hole 4 and be equipped with test connector 5, test connector 5 and printed circuit board 2's secondary circuit 202 electric connection, still be provided with fixed orifices 6 around port hole 4, test connector 5 passes through the bolt fastening in port hole 4, and the bolt is turned round and is fixed in fixed orifices 6 to fix test connector 5.

In this embodiment, above-mentioned scheme, specifically, fixed block 3 is the L type, and the corner of fixed block 3 has all been handled through the ARC, and the L type plays the fixed effect of a centre gripping, and the corner after handling through the ARC both can be used to circular SMT circulator, can also be used to fix square SMT circulator, has improved its suitability.

Specifically, the surface layer of the fixed block 3 is also provided with an anti-skid layer, and the anti-skid layer is used for ensuring the clamping stability.

Specifically, the three side plates 102 and the bottom plate 101 of the fixed cavity 1 are integrally formed, and the integrity and stability of the cavity can be ensured by the integral forming.

Specifically, the number of the fixing holes 6 is 4, and in the embodiment, the number of the fixing holes 6 is 4, and specifically, as shown in fig. 5, the fixing holes are respectively provided at the upper, lower, left, and right sides of the port hole.

Specifically, the test connector 5 is an SMA connector, and the SMA connector is adopted, so that the test connector has the characteristics of wide frequency band, excellent performance, high reliability and long service life, and is very suitable for connecting a microstrip line and a radio frequency line.

The working implementation principle is as follows: firstly, a printed circuit board 2 is welded with a bottom plate 101 of a fixed cavity 1, then the SMT circulator is placed in a fixed position, after the SMT circulator is fixedly clamped by a fixed block, the lower parts of three ports of the SMT circulator are in direct contact with the printed circuit board 2, three secondary circuits 202 of the printed circuit board 2 are electrically connected with test connectors 5 on side plates 102 of the fixed cavity 1, and the test connectors 5 are connected with external test equipment, so that the SMT circulator can be tested.

The utility model discloses a set up fixed cavity and printed circuit board, and be provided with the fixed block on the bottom plate of fixed cavity, fix the back with SMT microstrip circulator, its three port below can direct contact with printed circuit board, thereby with test connector electric connection on the curb plate of fixed cavity, test connector is connected with external test equipment again, carry out the test work on next step, there are not complicated device and equipment, the simple and convenient easy operation of structure, test connector can be with circulator port direct electric connection, can guarantee the integrality of test, it can directly accomplish test work to need not split the circulator, keep the integrality of circulator; to sum up, the utility model relates to a simple structure guarantees the novel tester equipment of SMT microstrip circulator of test effect, is applicable to the circulator field.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a novel test fixture of SMT microstrip circulator, a serial communication port, including fixed cavity and printed circuit board, printed circuit board includes three secondary circuit and a main circuit, fixed cavity includes three curb plate and a bottom plate, the fixed two fixed blocks that are provided with on the bottom plate of fixed cavity, the fixed block symmetry sets up, and the welding has printed circuit board on the bottom plate of fixed cavity, be provided with the port hole on the curb plate of fixed cavity, the downthehole additional installation of port is equipped with test joint, test joint and printed circuit board's secondary circuit electric connection, still be provided with the fixed orifices around the port hole.

2. The novel test fixture for the SMT microstrip circulator of claim 1, wherein the fixing block is L-shaped, and corners of the fixing block are all subjected to arc-shaped treatment.

3. The novel test fixture for the SMT microstrip circulator of claim 1 or claim 2, wherein a layer of anti-slip layer is further disposed on the surface layer of the fixed block.

4. The novel test fixture for the SMT microstrip circulator of claim 1, wherein the three side plates and the bottom plate of the fixed cavity are integrally formed.

5. The novel test fixture for the SMT microstrip circulator of claim 1, wherein the number of the fixing holes is 2-4.

6. The novel test fixture for SMT microstrip circulators of claim 1, wherein the test joints are SMA joints.