Test tool suitable for SMT microstrip circulator
By designing a test tool suitable for SMT microstrip circulator, using connectors, test bases and needle structures, the problem of poor contact between the port and the ground is solved, efficient and accurate test results and low losses are achieved, and the risk of product damage is reduced.
Patent Information
- Application Number
- CN202422053359.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The existing SMT microstrip circulator test tooling is difficult to ensure that the port and ground surface are in good contact at the same time during testing, resulting in high product scrapping rate, inaccurate test results and low efficiency.
A test tooling including a connector, a test base, a test carrier plate and a needle is designed. The test base has a groove and a needle fixing structure that fits the product's appearance. Through the combination of the needle and the test carrier plate, the port and the ground surface are ensured to have good contact at the same time and avoid pressing damage.
It achieves good contact between the port and the ground surface, reduces product damage risk, improves test accuracy and efficiency, reduces loss value, and is simple in structure, low in cost, and is easy to carry.
Smart Images
Figure CN223123137U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of microstrip circulator testing, in particular to a testing tool suitable for SMT microstrip circulators. Background Art
[0002] The testing of microstrip surface mount products has always been a problem that has existed in the microstrip field for a long time and has not been effectively solved. Manufacturers producing microstrip products have also been constantly exploring and developing in this field, making various attempts, but have never found an effective solution.
[0003] The currently mainstream SMT microstrip circulator testing tooling generally designs a grounding test area and port connection leads on a printed circuit board with the same size as the microstrip product, welds the printed circuit board on a metal carrier plate, and welds the other end of the port connection leads to a connector. Since the ports of the microstrip surface mount series products are on the bottom surface, testing needs to be carried out from the bottom surface of the product. When testing, it is necessary to press the microstrip product so that the grounding surface of the product and the ports are in contact at the same time to test the electrical performance. Due to the production height difference of each port during the production of the microstrip circulator, it is difficult to ensure the absolute flatness and the same plane of each port and the grounding surface. Therefore, when using this method for testing, a relatively large force is required to press the microstrip product so that each port and the grounding surface are in good contact at the same time. Under the action of a relatively large force, the product is easily broken, resulting in a relatively high product scrap rate during testing; it is also easy to have poor contact during pressing, making it difficult to measure the true electricity of the microstrip product. Often, the measured loss value is relatively large, the test result is not accurate enough, the test difficulty is relatively large, and the efficiency is not high. Summary of the Utility Model
[0004] In order to make up for the above deficiencies, the utility model provides a testing tool suitable for SMT microstrip circulators.
[0005] To achieve the above object, the utility model provides the following technical solutions:
[0006] A testing tool suitable for SMT microstrip circulators includes a connector, a test base, a test carrier plate, and spring pins; the connector is arranged on the side of the test base; the test base is provided with a groove that fits the shape of the test product, and a placement hole for placing the spring pins is provided at the bottom of the groove; the test carrier plate is fixed on the test base through the spring pins; the test product is placed on the test carrier plate, and the test product is connected to the pins on the connector through a microstrip line.
[0007] Further, the spring pin includes a thimble and a spring; the thimble is placed on the upper part of the spring and is enclosed and fixed in a cavity together.
[0008] Further, 6 placement holes are provided at the bottom of the groove.
[0009] Further, threaded holes are machined on the side of the test base.
[0010] Further, the connector is fixedly installed on the test base by screws.
[0011] Further, the outer shape of the test carrier plate is machined to be the same as the outer shape size of the product bottom.
[0012] The utility model has the following beneficial effects:
[0013] 1) It can enable good contact between the ports and the ground plane on the circulator that are not in the same plane.
[0014] 2) The test tooling has a simple structure and low manufacturing cost.
[0015] 3) It can simulate the customer usage scenario and avoid coupling and cavity effects.
[0016] 4) The test indexes are real, the loss value is small, and the measured electrical performance is more accurate and reliable.
[0017] 5) The test is simple and efficient, not easy to damage the product, and is beneficial to reducing the scrap rate.
[0018] 4) The tooling has a small size and is convenient to carry. Description of the Drawings
[0019] Figure 1 It is a schematic structural diagram of the test tooling;
[0020] Figure 2 It is a schematic structural diagram of the test base;
[0021] Figure 3 It is a schematic structural diagram of the spring pin;
[0022] Figure 1 In, Figure A is the front view, Figure B is the top view of Figure A, and Figure C is the left view of Figure B;
[0023] Description of the reference numerals: 1. Connector; 2. Test base; 3. Microstrip line; 4. Screw; 5. Test carrier plate; 6. Spring pin; 7. Lead pin; 8. Placement hole; 9. Threaded hole; 10. Groove; 601. Thumb pin; 602. Spring. Detailed Embodiment
[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0025] Reference Figure 1 and Figure 2 The utility model provides an embodiment: a test fixture suitable for an SMT microstrip circulator, including a connector 1, a test base 2, a test carrier 5 and a spring pin 6; the design of the test base 2 needs to be one to two times larger than the product size, so as to facilitate the placement of the designed microstrip line 3, and also to simulate the customer's usage environment to avoid coupling and cavity effects that affect the authenticity of the test indicators. A groove 10 that fits the product shape needs to be machined on the test base 2, and 6 placement holes 8 for the spring pin 6 are evenly machined at appropriate positions at the bottom of the groove for fixing and placing the spring pin 6. Combined with the port position of the microstrip circulator, threaded holes 9 need to be machined on the side of the test base 2 for installing the connector 1. The number and position of the threaded holes 9 can be changed and adjusted as needed, with high flexibility.
[0026] In this embodiment, if Figure 3 As shown, the internal structure of the spring pin 6 is a structure in which a pin 601 is placed on the top of a spring 602, which is closed and fixed in a cavity to prevent lateral shaking when the spring is extended and retracted.
[0027] The product shape groove 10 designed on the test base 2 should be as close to the shape of the SMT microstrip circulator as possible, which can ensure good grounding during testing and play a role in limiting. At the same time, a test carrier board 5 with the same size as the bottom shape of the product needs to be processed, and the SMT microstrip circulator is placed on the test carrier board 5 during testing.
[0028] When in use, first weld the designed printed circuit board on the test base 2. During welding, one end of the microstrip line 3 on the printed circuit board needs to be flush with the edge of the test base 2, and the other end is connected to the port position at the bottom of the product, which is used to connect the circulator port and the connector 1; then fix the spring pin 6 in the placement hole 8 of the test base 2, and then fix the test carrier board 5 at the ejector pin 601 of the spring pin 6, so that each spring pin 6 can be in contact and fixed; finally, install the connector 1 on the test base 2 using the screw 4. During installation, the lead pin 7 of the connector 1 needs to have good contact with the microstrip line 3 on the printed circuit board. Finally, place the microstrip product on the test carrier board 5, and press it slightly to test the electrical performance of the product.
[0029] The utility model provides a test tooling that is suitable for good contact and convenient testing of SMT microstrip circulators. This test tooling can simulate the user's usage environment, avoiding coupling and cavity effects during testing; when testing products, there is no need to press laboriously, the testing is simple, it is not easy to damage the product itself, and it does not affect the appearance of the product; since there are spring pins 6 under the test carrier 5, it can make all ports of the SMT microstrip circulator and the ground plane contact well at the same time, and has greater compatibility with the height difference brought during the production of the SMT microstrip circulator; because this test tooling makes up for the problem of poor contact, the tooling loss is smaller, the measured electrical performance is more accurate and reliable, and the consistency is also good; moreover, this test tooling has a simple structure, low manufacturing cost, small size, and is convenient to carry.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.
[0032] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A test tool applicable to an SMT microstrip circulator, characterized in that, It includes a connector (1), a test base (2), a test carrier board (5) and a spring pin (6); the connector (1) is arranged on the side of the test base (2); the test base (2) is provided with a groove (10) that fits the outer shape of the test product, and a placement hole (8) for placing the spring pin (6) is provided at the bottom of the groove (10); the test carrier board (5) is fixed on the test base (2) through the spring pin (6); the test product is placed on the test carrier board (5), and the test product is connected to the pin (7) on the connector (1) through a microstrip line (3).
2. The test tooling applicable to the SMT microstrip circulator according to claim 1, wherein The spring pin (6) includes a thimble (601) and a spring (602); the thimble (601) is placed on the upper part of the spring (602) and is enclosed and fixed in the cavity together.
3. The test tooling applicable to the SMT microstrip circulator according to claim 1, characterized in that There are 6 placement holes (8) at the bottom of the groove (10).
4. The test tooling applicable to the SMT microstrip circulator according to claim 1, characterized in that, A threaded hole (9) is machined on the side of the test base (2).
5. The test tooling applicable to the SMT microstrip circulator according to claim 4, characterized in that The connector (1) is fixedly installed on the test base (2) through a screw (4).
6. The test tooling applicable to the SMT microstrip circulator according to claim 1, characterized in that, The outer shape of the test carrier board (5) is machined to be the same as the outer shape size of the product bottom.