A high-performance, low-loss VNA connector and its use method

Abstract

The present invention provides a high-performance, low-loss VNA connector and a corresponding method of use, comprising: a connecting body one, which is sleeved on the outermost side of a cable; a connecting body two, which is connected to the inner side of the connecting body one; a connecting body three, which is connected to the inner side of the connecting body two; a connecting body four, which is connected to the outer side of the connecting body three and connected to the connecting body one and the connecting body two, wherein the connecting body four can be matched with a test port and / or a coaxial connector; a tail tube body, which is connected to the outer side of the outer conductor layer of the cable and is located on the inner side of the connecting body two; a screw sleeve body, which is connected to the outer side of the tail tube body and connected to the connecting body three, wherein the screw sleeve body and the connecting body four are respectively located at opposite ends of the connecting body three; and a center pin body, which is connected to the inner conductor of the cable and penetrates into the connecting body three and the connecting body four. The present invention directly reduces the test assembly process, increases test efficiency, reduces insertion loss, reduces standing wave return loss, and also reduces the risk of damage to the VNA.

Description

Technical Field

[0001] The present invention relates to the technical field of test accessories for radio frequency coaxial products, and in particular to a high-performance, low-loss VNA connector and a corresponding use method. Background Art

[0002] Currently, if Figure 1 As shown, for RF coaxial transmission products, they need to be tested after being matched with a vector network analyzer through a connector. After the current connector is assembled, it needs to be connected using an NMD adapter before it can be connected to the VNA test port for testing. Under the requirements of such high-precision component testing, adding an additional adapter is relatively troublesome in assembly, and the electrical length is also greatly increased, which directly increases the insertion loss of the entire test part and may make the return loss worse, affecting the test effect, which is insufficient. Summary of the Invention

[0003] The present invention aims to avoid the deficiencies of the prior art and provides a high-performance, low-loss VNA connector to ensure accurate testing and minimize insertion loss.

[0004] The present invention solves the technical problem by adopting the following technical solution: a high-performance, low-loss VNA connector, comprising: a connecting body 1, which is sleeved on the outermost side of the cable;

[0005] Connecting body 2, access is arranged on the inner side of connecting body 1;

[0006] Connecting body three, access setting connecting body two inner side;

[0007] Connecting body 4 is provided outside connecting body 3 and connected to connecting body 1 and connecting body 2. Connecting body 4 can be mated with a test port and / or a coaxial connector;

[0008] The tail pipe body is connected to the outside of the outer conductor layer of the cable and is located inside the second connecting body;

[0009] The screw sleeve body is connected to the outside of the tail pipe body and is connected to the connecting body three. The screw sleeve body and the connecting body four are respectively located at opposite ends of the connecting body three.

[0010] The central needle body is connected to the inner conductor of the cable and penetrates into the third connecting body and the fourth connecting body.

[0011] In several embodiments, a welding cup body is welded to the outside of the outer conductor layer of the cable, and the tail pipe body is sleeved on the outside of the welding cup body.

[0012] In several embodiments, the third connecting body includes a front connecting portion and a rear connecting portion, the front connecting portion is threadedly engaged with the screw sleeve, and the rear connecting portion is threadedly engaged with the fourth connecting body.

[0013] In several embodiments, a step portion is provided in the screw sleeve body, and the tail pipe body is confined between the step portion and the welding cup body.

[0014] In several embodiments, the connecting body four includes a front sleeve portion, a middle sleeve portion and a tail sleeve portion arranged in sequence, the front sleeve portion is used to connect to an external object, the middle sleeve portion is threadedly engaged with the rear connecting portion, and the tail sleeve portion is threadedly engaged with the connecting body one and the connecting body two.

[0015] In several embodiments, the first connecting body is threadedly engaged with the outer side of the tail sleeve, and the second connecting body is threadedly engaged with the inner side of the tail sleeve.

[0016] In several embodiments, an insulator is sleeved on the outer side of the central needle body, and the insulator is fitted on the inner side of the connecting body three.

[0017] In several embodiments, a color ring for identifying cable information is sleeved on the outer side of the connecting body 1.

[0018] In several embodiments, a locking hole is radially provided on the connecting body, and the locking member is inserted into the locking hole and abuts against the outer side of the tail sleeve.

[0019] At the same time, the present invention also provides a method for using the above-mentioned high-performance, low-loss VNA connector, comprising the following steps:

[0020] S1: Put the insulator onto the center pin and insert them into the inner side of the connecting body;

[0021] S2: Screw the fourth connecting body onto the outside of the third connecting body, so that the central needle part is located on the inside of the fourth connecting body;

[0022] S3: Weld the solder cup to the outside of the outer conductor layer of the cable, and connect the inner conductor of the cable to the center pin inside the third connecting body. At this time, the solder cup abuts against the end surface of the third connecting body.

[0023] S4: Connect the tail pipe body to the inner side of the screw sleeve body, and the two are connected on the cable and moved to the position of the welding cup body. Then, the screw sleeve body is screwed to the outer side of the connecting body 3 and fixed;

[0024] S5: Continue to insert the second connecting body onto the cable, move the second connecting body to the fourth connecting body position and screw it onto the inner side of the fourth connecting body, then insert the first connecting body onto the cable, move the first connecting body to the fourth connecting body position and screw it onto the outer side of the fourth connecting body;

[0025] S6: Screw the locking member into the locking hole until it abuts against the connecting body 4, thereby fixing the connecting body 1 and the connecting body 4;

[0026] S7: Slip the color ring onto the outside of the connector body 1 to complete the connector assembly;

[0027] S8: Connect one end of the connector body to the VNA port and the other end to the test product to perform the connection test.

[0028] The beneficial effects of the present invention are:

[0029] Through the assembly structure of the present invention, it can be directly connected to the VNA port without the need for an adapter, which directly reduces the test assembly process, increases test efficiency, reduces insertion loss, reduces standing wave return loss, and also reduces the risk of damage to the VNA. While ensuring normal application, its performance and insertion loss advantages are maximized, while improving the connection strength between the cable and the tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are for illustrative purposes only of selected embodiments and do not represent all possible implementations, and should not be considered to limit the scope of the present invention.

[0031] Figure 1 The assembly structure of a connector in the prior art is schematically shown;

[0032] Figure 2 The overall structure of a high-performance, low-loss VNA connector in one embodiment is schematically shown;

[0033] Figure 3 Schematically shows Figure 1 Cross-sectional structure;

[0034] Figure 4 Schematically illustrates a portion of the usage state of a high-performance, low-loss VNA connector in one embodiment;

[0035] Figure 5 Schematically illustrates the complete use state of a high-performance, low-loss VNA connector in one embodiment;

[0036] Figure 6 Schematically shows the test results of the connector of the prior art;

[0037] Figure 7 Schematically shows Figure 5 Test results of the connector used. DETAILED DESCRIPTION

[0038] Below, the embodiments of the present invention are described in detail. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0040] The terms used herein are intended to explain the embodiments and are not intended to limit and / or define the present invention.

[0041] For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front and back, left and right" that indicate relative or absolute configurations not only indicate such configurations in a strict sense, but also indicate a state of relative displacement with a tolerance, or with an angle or distance that can achieve the same degree of functionality.

[0042] like Figure 1 As shown, after the connector a in the prior art is assembled with the cable 100, a VNA adapter b needs to be assembled, and the connector a needs to be connected to the VNA test port c through the VNA adapter b to be tested by the VNA vector network analyzer.

[0043] Example 1

[0044] like Figure 2-Figure 4 As shown, the high-performance, low-loss VNA connector in this embodiment is mainly composed of a connecting body 1, a connecting body 2, a connecting body 3, a connecting body 4, a tail pipe body 5, a screw sleeve body 6, a center needle body 7 and a welding cup body 8, all of which are coaxially arranged. The whole is connected to both ends of the cable 100, and can be connected to the coaxial connector port of the test product and the VNA test port to realize the test function.

[0045] Specifically, the connecting body 1 is sleeved on the outer side of the cable 100, and is sleeved and locked on the armor part of the cable 100. The inner diameter of the front part is smaller than that of the middle and tail parts, and the overall structure is a long tubular structure.

[0046] In addition, the connecting body 2 is connected to the inner side of the connecting body 1, the front part of the connecting body 2 is sleeved on the outside of the armor part of the cable 100, and the tail part extends to a position flush with the tail end face of the connecting body 1, that is, the connecting body 2 is completely located on the inner side of the connecting body 1, and at the tail position of both, specifically, an external thread is set on the outer side of the connecting body 2, and an internal thread is set on the inner side of the connecting body 1.

[0047] In addition, the welding cup body 8 is welded to the outside of the outer conductor layer 110 of the cable 100, and the tail tube body 5 is correspondingly sleeved on the outside of the welding cup body 8 and partially located on the inside of the screw sleeve body 6. The welding cup body 8, the tail tube body 5, and the screw sleeve body 6 are located as a whole on the inside of the connecting body 2, and a ring-shaped protruding step portion 61 is provided at the front position of the inner side of the screw sleeve body 6. The tail tube body 5 penetrates from the rear position of the screw sleeve body 6 until it is stuck by the step portion 61 and cannot continue to move forward. As a result, the tail tube body 5 is restricted and fixed between the screw sleeve body 6 and the welding cup body 8, and the front part of the tail tube body 5 is extended and sleeved on the cable 100, which has a certain protective effect on it.

[0048] In addition, the connecting body three 3 is partially connected to the inner side of the connecting body two 2. The connecting body three 3 consists of a two-section structure of a front connecting part 31 and a rear connecting part 32 with the same inner diameter but different outer diameters. The outer sides of the front connecting part 31 and the rear connecting part 32 are both provided with threaded areas, and the front connecting part 31 is screwed into the inner side of the screw sleeve body 6 through threads.

[0049] In addition, the connecting body 44 includes a front sleeve portion 41, a middle sleeve portion 42 and a tail sleeve portion 43 arranged in sequence, the three having different inner diameters, and the outer diameter of the middle sleeve portion 42 is consistent with the outer diameter of the connecting body 1. The front sleeve portion 41 gradually decreases from the middle sleeve portion 42 to the outside, and the front sleeve portion 41 is connected to the middle position of the end face of the middle sleeve portion 42, and threaded areas are provided on both the inner and outer sides of the front sleeve portion 41.

[0050] Therefore, the front sleeve portion 41 is used to connect to an external object, such as a connector port of a test object and a VNA test port.

[0051] Among them, the middle sleeve part 42 is threadedly matched with the rear connecting part 32, and the tail sleeve part 43 is threadedly matched with the connecting body 1 and the connecting body 2, that is, the tail sleeve part 43 is located in the gap between the connecting body 1 and the connecting body 2, and the three are screwed and fixed by threads.

[0052] In addition, an insulator 10 is sleeved on the outside of the central needle body 7. The insulator 10 is generally formed by two semicircular rings. The insulator 10 is fitted on the inner side of the connecting body 3 3 and is located at the hole position of the connecting body 3 3 .

[0053] In addition, a locking hole 101 is radially provided on the connecting body 1, and the locking member 102 is inserted into the locking hole 101 and abuts against the outer side of the tail sleeve part 43. The locking hole 101 and the locking member 102 can be matched with each other by threads. The threads at the outer position of the tail sleeve part 43 corresponding to the locking hole 101 are ground flat. Therefore, when the locking member 102 is tightened, the movement of the connecting body 1 on the tail sleeve part 43 can be restricted to achieve a fixed connection.

[0054] Furthermore, a color ring 9 is sleeved on the outer side of the connecting body 1 for identifying information of the cable 100, such as specifications.

[0055] like Figure 2-Figure 5 As shown in the figure, the assembly and use of this connector mainly consists of the following steps:

[0056] First, put the insulator 10 on the center needle body 7, and insert the two into the inner side of the connecting body 3 from one end. The insulator 10 is just located in the insertion position, and the center needle body 7 is partially located inside the connecting body 3 and partially extends to its outside.

[0057] Secondly, the middle sleeve portion 42 in the connecting body four 4 is screwed onto the outside of the rear connecting portion 32 in the connecting body three 3. At this time, the center needle body 7 partially enters the inside of the connecting body four 4.

[0058] Secondly, the solder cup body 8 is welded to the outside of the outer conductor layer 110 of the cable 100, and the inner conductor 120 of the cable 100 is connected to the center needle body 7 inside the connecting body three 3. At this time, the solder cup body 8 is in contact with the end face of the front connecting part 31 in the connecting body three 3.

[0059] Secondly, connect the tail tube body 5 to the inner side of the screw sleeve body 6, then put the two on the cable 100 and move them to the position of the welding cup body 8, and then screw the screw sleeve body 6 to the outside of the front connection part 31 in the connecting body 3 and fix it until the tail tube body 5 is not loose.

[0060] Secondly, continue to put the connecting body 2 onto the cable 100, move the connecting body 2 onto the position of the connecting body 44 and screw it onto the inner side of the tail sleeve 43 in the connecting body 44, then put the connecting body 1 onto the cable 100, move the connecting body 1 onto the position of the connecting body 44 and screw it onto the outer side of the tail sleeve 43 in the connecting body 44, until both the connecting body 2 2 and the connecting body 1 are in contact with the end face of the middle sleeve 42.

[0061] Next, the locking member 102 is screwed into the locking hole 101 until it contacts the connecting body 24 4 , thereby fixing the connecting body 1 1 and the connecting body 24 4 .

[0062] Secondly, the corresponding color ring 9 is put on the outside of the connecting body 1 to complete the connector assembly at one end of the cable 100. The above assembly steps are continued at the other end of the cable 100 until both ends of the cable 100 are equipped with connectors. Of course, the above assembly steps can be performed on both ends of the cable 100 at the same time.

[0063] Finally, connect one end of the front sleeve 41 of one connecting body 44 of the assembled connector directly to the VNA end interface, and connect one end of the front sleeve 41 of the other connecting body 44 to the conventional coaxial connector port in the test product, and then perform the connection test.

[0064] The same test product using the prior art connector and the connector of this embodiment is tested respectively.

[0065] like Figure 6 As shown, for the connector in the prior art, the test data is:

[0066] Standing wave: 1.23max, insertion loss: 4.01dB.

[0067] like Figure 7 As shown, for the connector in this embodiment, the test data is:

[0068] Standing wave: 1.16max, insertion loss 3.64dB.

[0069] From the test results, it can be seen that the standing wave and insertion loss of this embodiment are better than those of the traditional structure.

[0070] It should be noted that the illustrated examples, embodiments, and special forms of the present invention have been shown and described in detail in the drawings and the foregoing description, and should also be considered illustrative rather than restrictive. The description of particular features in one embodiment does not mean that those particular features are necessarily limited to that embodiment. Features of one embodiment can be used in combination with features of other embodiments, which can be understood by those of ordinary skill in the art, whether or not explicitly stated so. Exemplary embodiments have been shown and described, and all variations and improvements fall within the spirit of the present invention and are expected to be protected.

Claims

1. A high-performance, low-loss VNA connector for connecting a cable (100) and accessing an external object, characterized in that: The high-performance, low-loss VNA connector comprises: A connecting body (1) is sleeved on the outside of the cable (100); The second connecting body (2) is connected to the inner side of the first connecting body (1); The third connecting body (3) is connected to the inner side of the second connecting body (2); A connection body four (4) is connected to the outside of the connection body three (3) and is connected to the connection body one (1) and the connection body two (2). The connection body four (4) can be matched with a test port and / or a coaxial connector; A tail tube body (5) is connected to the outside of the outer conductor layer (110) of the cable (100) and is located inside the second connecting body (2); The screw sleeve body (6) is connected to the outside of the tail tube body (5) and is connected to the connecting body three (3). The screw sleeve body (6) and the connecting body four (4) are respectively located at the opposite ends of the connecting body three (3); the center needle body (7) is connected to the inner conductor (120) of the cable (100) and penetrates into the connecting body three (3) and the connecting body four (4); the connecting body four (4) includes a front sleeve part (41), a middle sleeve part (42) and a tail sleeve part (43) arranged in sequence, the front sleeve part (41) is used to connect to an external object, the middle sleeve part (42) is threadedly matched with the rear connecting part (32), and the tail sleeve part (43) is threadedly matched with the connecting body one (1) and the connecting body two (2).

2. A high-performance, low-loss VNA connector according to claim 1, characterized in that: A welding cup body (8) is welded to the outside of the outer conductor layer (110) of the cable (100), and the tail tube body (5) is sleeved on the outside of the welding cup body (8).

3. A high-performance, low-loss VNA connector according to claim 2, characterized in that: The connecting body three (3) includes a front connecting part (31) and a rear connecting part (32), wherein the front connecting part (31) is connected to the screw sleeve body (6) through threaded engagement, and the rear connecting part (32) is connected to the connecting body four (4) through threaded engagement.

4. A high-performance, low-loss VNA connector according to claim 3, characterized in that: A step portion (61) is provided in the screw sleeve body (6), and the tail pipe body (5) is confined between the step portion (61) and the welding cup body (8).

5. The high-performance, low-loss VNA connector according to claim 4, characterized in that: The first connecting body (1) is connected to the outer side of the tail sleeve (43) through threaded engagement, and the second connecting body (2) is connected to the inner side of the tail sleeve (43) through threaded engagement.

6. The high-performance, low-loss VNA connector according to claim 5, characterized in that: An insulator (10) is sleeved on the outer side of the central needle body (7), and the insulator (10) is arranged on the inner side of the connecting body three (3).

7. The high-performance, low-loss VNA connector according to claim 6, characterized in that: The outer side of the connecting body (1) is sleeved with a color ring (9) for identifying information of the cable (100).

8. The high-performance, low-loss VNA connector according to claim 7, characterized in that: A locking hole (101) is radially provided on the connecting body (1), and the locking hole (101) is used for a locking member (102) to be inserted and abut against the outer side of the tail sleeve portion (43).

9. A method for using the high-performance, low-loss VNA connector according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Sleeve the insulator (10) onto the central needle (7), and insert both into the inner side of the connecting body (3); S2: Screw the connecting body four (4) onto the outside of the connecting body three (3), so that the central needle body (7) is located inside the connecting body four (4); S3: Weld the welding cup (8) to the outside of the outer conductor layer of the cable (100), and connect the inner conductor (120) of the cable (100) to the center needle (7) inside the connecting body (3), at which time the welding cup (8) abuts against the end face of the connecting body (3); S4: Connect the tail tube body (5) to the inner side of the screw sleeve body (6), and the two are sleeved on the cable (100) and moved to the position of the welding cup body (8), and then the screw sleeve body (6) is screwed to the outer side of the connecting body (3) and fixed; S5: Continue to insert the second connecting body (2) onto the cable (100), the second connecting body (2) moves to the fourth connecting body (4) position and is screwed onto the inner side of the fourth connecting body (4), then insert the first connecting body (1) onto the cable (100), the first connecting body (1) moves to the fourth connecting body (4) position and is screwed onto the outer side of the fourth connecting body (4); S6: Screw the locking member into the locking hole (101) until it contacts the connecting body four (4), thereby fixing the connecting body one (1) and the connecting body four (4); S7: Slip the color ring (9) onto the outside of the connecting body (1) to complete the connector assembly; S8: Connect one end of the connecting body (4) of the assembled connector directly to the VNA end interface and the other end to the test product to perform the connection test.

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