Insertion loss Kebang and wiring structure thereof
By employing a wiring unit with a bend in the wiring structure of the insertion loss converter, and designing the length as a non-multiple relationship, the problems of insertion loss curve resonance and large space occupation in the prior art are solved, achieving the effects of small space occupation and resonance elimination.
Patent Information
- Application Number
- CN202423321878.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing wiring structures cannot simultaneously meet the requirements of not generating resonance in the insertion loss curve and occupying a small space.
A wiring structure with insertion loss is provided, comprising multiple sequentially connected routing units, each routing unit having a bend, with different lengths and not in a multiple relationship. By setting bends in the routing units, the space perpendicular to the routing extension direction is fully utilized, and by adjusting the lengths of the bends and connections, the lengths of the routing units are ensured to be non-multiple relationships to avoid resonance.
This method achieves at least partial elimination of the resonance of the insertion loss curve while occupying a smaller space, thus improving the accuracy of insertion loss testing.
Smart Images
Figure CN223859330U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of testing, and in particular, to an insertion loss test coupon and its wiring structure. Background Art
[0002] Currently, for a PCB that requires quantifying the insertion loss of the wiring, an insertion loss test coupon (Insertion Loss Test Coupon) with the same stack-up structure is usually made separately. The insertion loss test coupon is designed with the same wiring layer as the PCB, impedance lines with the same line width / line pitch, and test interfaces. By testing the insertion loss of the traces on the insertion loss test coupon and running the corresponding de-embedding algorithm to remove the influence of the test interfaces, the insertion loss per unit length of the traces on the insertion loss test coupon can be obtained.
[0003] In the related art, there are various wiring structures for the insertion loss test coupon. However, the existing wiring structures cannot simultaneously meet the requirements of no resonance in the insertion loss curve and occupying a small space. Summary of the Utility Model
[0004] The object of the present disclosure is to provide an insertion loss test coupon and its wiring structure, which has a small occupied space and at least partially eliminates the resonance of the insertion loss curve.
[0005] To achieve the above object, according to the first aspect of the present disclosure, a wiring structure of an insertion loss test coupon is provided. The wiring structure includes traces, and the traces include a plurality of sequentially connected trace units. Each trace unit includes a bent portion, and at least some of the trace units have different lengths and are not in a multiple relationship.
[0006] Optionally, any two trace units have different lengths, and the lengths of any two trace units are not in a multiple relationship.
[0007] Optionally, along the extending direction of the traces, the lengths of the trace units gradually increase.
[0008] Optionally, the bent portions of the trace units bend towards the same side of the extending direction of the traces.
[0009] Optionally, the trace unit further includes a connecting portion connected to at least one end of the bent portion, and the bent portions of adjacent two trace units are connected through the connecting portion.
[0010] Optionally, the trace unit is generally in a "Ji" shape.
[0011] Optionally, the connecting portions have the same length, and the bent portions have different lengths.
[0012] Optionally, among the plurality of trace units, the depths and / or widths of the bent portions are different.
[0013] Optionally, the bending portions have the same length, while the connecting portions have different lengths.
[0014] Optionally, the length of the wiring unit satisfies the following formula:
[0015] L m = (m-1)×k×10 -n ×L1+L1
[0016] Where L1 is the length of the first routing unit; L m Let k be the length of the m-th routing unit; k is an odd number; n is an integer greater than 0.
[0017] or,
[0018] The length of the wiring unit satisfies the following formula:
[0019] L m = (1+k) m-1 ×L1
[0020] Where L1 is the length of the first routing unit; L m is the length of the m-th trace unit; k is any small number.
[0021] Optionally, multiple routing units are arranged symmetrically about the central axis of the routing.
[0022] According to a second aspect of this disclosure, an insertion loss connector is also provided, the insertion loss connector including the wiring structure described above.
[0023] Through the above-described technical solution, namely the wiring structure of this disclosure, the trace includes multiple trace units with bends. At least some of the trace units have different lengths and are not multiples of each other. By setting bends in the trace units, the space perpendicular to the trace extension direction can be fully utilized. At the same time, setting at least some of the trace units to a structure with different lengths and not multiples of each other can at least partially eliminate the resonance of the insertion loss curve. Compared with related technologies, the wiring structure of this disclosure has the advantages of small space occupation and at least partial elimination of resonance.
[0024] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0025] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0026] Figure 1 It is the S-parameter curve of the insertion loss curve that generates resonance in related technologies;
[0027] Figure 2 is a wiring structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure;
[0028] Figure 3 is a structure schematic diagram of a wiring unit provided by some embodiments of the present disclosure;
[0029] Figure 4 is a wiring structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure;
[0030] Figure 5 is a wiring structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure;
[0031] Figure 6 is a wiring structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure;
[0032] Figure 7 is a wiring structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure;
[0033] Figure 8 is an S parameter curve of an insertion loss curve in a wiring structure of an insertion loss coban provided by some embodiments of the present disclosure;
[0034] Figure 9 is a structure schematic diagram of an insertion loss coban provided by some embodiments of the present disclosure.
[0035] Legend of reference signs
[0036] 10-wiring structure; 100-wiring; 101-middle axis; 110-wiring unit; 111-bending part; 1111-first segment; 1112-second segment; 1113-third segment; 112-connection part;
[0037] 20-body. DETAILED DESCRIPTION
[0038] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.
[0039] In the present disclosure, the orientation words such as "left, right" used herein generally refer to the left and right in the drawings unless otherwise stated; "inner, outer" refer to the inner and outer of the profile of the corresponding components; "far, near" refer to the corresponding structure or the corresponding component far away or close to another structure or component. F in the drawings of the present disclosure indicates the extension direction of the wire. In addition, the terms "first", "second" and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequential and important meanings. Furthermore, in the following description, the same reference numerals in different drawings represent the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as a limitation of the present disclosure.
[0040] For the PCB (defined as A board) which needs to quantify the insertion loss of the wiring, a PCB (defined as B board) with the same layer structure is separately made. The PCB (B board) is designed with the same wiring layer as the PCB (A board), the same impedance line with the same line width / line spacing, and a test interface. By testing the insertion loss of the wiring on the PCB (B board) and running the corresponding de-embedding algorithm to remove the influence of the test interface, the insertion loss per unit length of the wiring on the PCB (B board) can be obtained. Because the PCB (A board) and the PCB (B board) have the same layer structure, the layer where the impedance line is located, the line width, and the line spacing are the same, so the insertion loss per unit length of the wiring of the PCB (A board) can also be obtained. The PCB (B board) is called an insertion loss test coupon.
[0041] In the related art, the wiring structure of the insertion loss test coupon usually has a straight line structure, a periodic winding structure, and a serpentine line structure. Among them, the advantage of the straight line structure is simple design, but it occupies a large space on the PCB; and due to the glass fiber effect, the insertion loss curve is prone to resonance. The advantage of the periodic winding structure is simple design and small PCB space occupation, but due to the existence of a large number of periodic structures, the insertion loss curve is prone to resonance. The serpentine line structure simultaneously avoids the glass fiber effect and a large number of periodic structures, and the insertion loss curve will not produce resonance; but it occupies a large space on the PCB.
[0042] As shown in Figure 1 , it is an S parameter curve of the insertion loss curve caused by the glass fiber effect or the existence of a large number of periodic structures in the wiring, as shown by the three small drop areas on the curve in the figure.
[0043] As described above, the existing three wiring structures cannot simultaneously achieve the non-resonance of the insertion loss curve and the occupation of a small PCB space.
[0044] Based on this, the purpose of the present disclosure is to provide an insertion loss test coupon and a wiring structure thereof, which has the advantages of small space occupation and at least partial elimination of the resonance of the insertion loss curve.
[0045] To achieve the above object, as Figures 2 to 8 According to a first aspect of the present disclosure, a wiring structure for insertion loss calibration is provided, the wiring structure 10 comprises a wire 100, the wire 100 comprises a plurality of wire units 110 connected in sequence, each wire unit 110 comprises a bending part 111, and the lengths of at least part of the wire units 110 are different and in a non-multiple relationship.
[0046] According to the above technical solution, the wire 100 of the wiring structure 10 of the present disclosure comprises a plurality of wire units 110 with bending parts 111, and the lengths of at least part of the wire units 110 are different and in a non-multiple relationship. By providing the bending part 111 in the wire unit 110, the space perpendicular to the wire extension direction F can be fully utilized, and at the same time, by setting at least part of the wire units 110 to be different lengths and in a non-multiple relationship, the resonance of the insertion loss curve can be at least partially eliminated. Compared with the related art, the wiring structure 10 of the present disclosure has the advantages of small occupied space and at least partial elimination of the resonance of the insertion loss curve.
[0047] It should be noted that the wire extension direction F refers to the direction from one end of the wire 100 to the other end of the wire 100. Compared with the straight structure and the serpentine structure in the related art, since the wire unit 110 of the wiring structure 10 comprises a bending part 111, it can extend a certain distance perpendicular to the wire extension direction F, thus the length of the entire wire 100 can be reduced, and the occupied space can be saved. At the same time, in the wiring structure 10, the lengths of at least part of the wire units 110 are different and in a non-multiple relationship, compared with the periodic winding structure in the related art, the resonance can be at least partially eliminated.
[0048] It can be understood that the wiring structure 10 can also comprise a terminal connected to the end of the wire 100, for connecting with an external circuit or a test circuit. Of course, the wiring structure 10 also comprises other components necessary for insertion loss calibration, which can be selected and installed according to the related art, and will not be described here.
[0049] In some embodiments, the lengths of any two wire units 110 are different, and the lengths of any two wire units 110 are in a non-multiple relationship. Among them, the lengths of any two wire units 110 are different, and in any two wire units 110, one wire unit 110 is not an integer multiple of the length of the other wire unit 110, so that in the entire wire 100, any two wire units 110 will not resonate due to the same length, thereby improving the accuracy of the insertion loss test.
[0050] It can be understood that the lengths of the plurality of trace units 110 can be sequentially increased, or decreased and arranged in disorder, as long as the lengths of any two trace units 110 are not equal and in a non-multiple relationship.
[0051] In some embodiments, the lengths of the plurality of trace units 110 gradually increase along the extension direction of the trace 100. In this case, the lengths of the plurality of trace units 110 gradually increase from one end of the trace 100 towards the other end. Of course, in other embodiments, the lengths of the plurality of trace units 110 gradually decrease from one end of the trace 100 towards the other end. In yet other embodiments, the lengths of the plurality of trace units 110 are arranged in disorder, i.e., randomly, from one end of the trace 100 towards the other end, with some being long and some being short.
[0052] The bending portion 111 is recessed or protruded in a direction perpendicular to the extension direction F of the trace, as shown in FIG. 1B. In some embodiments, the bending portion 111 of the trace unit 110 is bent towards the same side of the extension direction F of the trace. That is, the recess or protrusion forming the bending portion 111 is on the same side of the extension direction F of the trace, and the recess or protrusion can occupy the space of the insertion loss section in a direction perpendicular to the extension direction F of the trace, thereby reducing the length of the extension direction F of the trace, so as to reduce the overall size occupation. Figure 2
[0053] It should be noted that the recess or protrusion forming the bending portion 111 can also extend to opposite sides of the extension direction F of the trace, respectively. For example, the bending portion 111 can be protruded, with one part extending to one side and the other part extending to the opposite side. Since the lengths of any two trace units 110 are different and in a non-multiple relationship, resonance can also be avoided in the case of reducing space occupation.
[0054] The trace unit 110 can be constructed in any structure including the bending portion 111, as shown in FIGS. 1C and 1D. Figure 2 Figure 3 In some embodiments, the trace unit 110 further includes a connecting portion 112 connected to at least one end of the bending portion 111, and the bending portions 111 of adjacent two trace units 110 are connected through the connecting portion 112. In this case, the connecting portion 112 is connected to one end of the bending portion 111, and the connecting portion 112 of one trace unit 110 is connected to the end of the bending portion 111 of another trace unit 110 away from the corresponding connecting portion 112, so as to realize the connection of the plurality of trace units 110.
[0055] For example, the wiring unit 110 can further include a bending portion 111 and a connecting portion 112 connected to opposite ends of the bending portion 111, and the bending portions 111 of two adjacent wiring units 110 are connected by the two connecting portions 112, so that the connection of multiple wiring units 110 can also be achieved.
[0056] The shape of the wiring unit 110 can be any suitable structure, and in some embodiments, the wiring unit 110 is generally in the shape of a "U". The "U" shape is formed by the bending portion 111 and at least one connecting portion 112. For example, the "U" shape can be formed by one bending portion 111 and two connecting portions 112 connected to opposite ends of the bending portion 111. It can be understood that the bending portion 111 of the wiring unit 110 of the present disclosure can also be, for example, N-shaped or M-shaped, which can occupy space perpendicular to the extension direction of the wiring to save space.
[0057] Each of the plurality of wiring units 110 of the wiring 100 can be composed of the bending portion 111 and the connecting portion 112, and by precisely controlling the length of each bending portion 111 and / or connecting portion 112, the length of each wiring unit 110 is ensured to be different, and the length of any two wiring units 110 is not in a multiple relationship, so as to destroy the periodic structure of the wiring and thus avoid resonance.
[0058] In order to ensure that the lengths of the plurality of wiring units 110 are different, and the lengths of any two wiring units 110 are not in a multiple relationship, the length of the bending portion 111 and / or the connecting portion 112 can be adjusted to achieve this, as shown in Figure 2 In some embodiments, the lengths of the connecting portions 112 of each wiring unit 110 are the same, and the lengths of the bending portions 111 of each wiring unit 110 are different, that is, by adjusting the length of the bending portion 111, the lengths of any two wiring units 110 in the plurality of wiring units 110 are different and not in a multiple relationship, which can save space occupation while avoiding resonance.
[0059] In some embodiments, when the lengths of the connecting portions 112 of each wiring unit 110 are the same, the lengths of the bending portions 111 of each wiring unit 110 can also be adjusted, so that the lengths of each wiring unit 110 are different and not in a multiple relationship between any two. As shown in Figure 4 and Figure 6 As shown in the plurality of wiring units 110, the depth D and / or the width W of the bending portion 111 are different. As shown in Figure 3As shown, the bending part 111 can include a first segment 1111, a second segment 1112 and a third segment 1113 connected in sequence, wherein the first segment 1111 and the third segment 1113 are parallel to each other, and the second segment 1112 is between the first segment 1111 and the third segment 1113 and connected to the ends of the first segment 1111 and the third segment 1113 away from the connecting part 112. In order to better realize the manufacturing, the lengths of the first segment 1111 and the third segment 1113 are the same, and the second segment 1112 is perpendicular to the first segment 1111 and the third segment 1113. At this time, it can be found that the lengths of the first segment 1111 and the third segment 1113 are the depth D of the bending part 111, and the distance between the first segment 1111 and the third segment 1113, that is, the length of the second segment 1112, is the width W of the bending part 111. By adjusting the depth D of the bending part 111 (that is, the lengths of the first segment 1111 and the third segment 1113), the length of the entire wiring unit 110 can be adjusted; at the same time, by adjusting the width W of the bending part 111 (that is, the distance between the first segment 1111 and the third segment 1113, or the length of the second segment 1112), the length of the entire wiring unit 110 can also be adjusted.
[0060] As shown in the drawings, Figure 6 In some embodiments, the lengths of the bending parts 111 of the plurality of wiring units 110 are the same, and the lengths of the connecting parts 112 are different. By changing the lengths of the connecting parts 112, the lengths of the plurality of wiring units 110 can also be different, and the relationship between any two of them is not a multiple relationship, thereby saving space and avoiding resonance.
[0061] In the wiring structure 10 of the insertion loss, when the number of the wiring units 110 is large, it is difficult to ensure that the lengths of any two wiring units 110 are not equal and not in a multiple relationship. Therefore, some operable embodiments are given to further illustrate how to design the lengths of the wiring units 110.
[0062] The lengths of the wiring units 110 are preferably able to satisfy a certain rule or be defined by a formula, so as to avoid confusion of the lengths of the plurality of wiring units 110. In some embodiments, the lengths of the wiring units 110 of the wiring 100 satisfy the following formula (1):
[0063] L m =(m-1)×k×10 -n ×L1+L1(1)
[0064] Wherein, L1 is the length of the first wiring unit 110; L m is the length of the mth wiring unit 110; k is an odd number; m is a natural number; and n is an integer greater than 0.
[0065] For example, when k is 0.3, the length of the first routing unit 110 is L1, the length of the second routing unit 110 is L2 = 1.3L1, the length of the third routing unit 110 is L3 = 1.6L1, the length of the fourth routing unit 110 is L4 = 1.9L1, and the lengths of the subsequent routing units 110 are sequentially similar. In this way, it can be operatively ensured that the lengths of any two routing units 110 are different and not in a multiple relationship, thereby avoiding resonance of the insertion loss curve. At the same time, since the routing adopts a new winding structure (i.e., the bending part), and the space occupied by the insertion loss can be greatly reduced.
[0066] As shown in Figure 8 , when k = 0.3, the insertion loss curve of the wiring structure formed by calculating the length of each routing unit 110 is shown in the figure, and it can be seen that resonance does not occur. Therefore, it is proved that the formula and the above method form a routing (wiring structure) that can avoid resonance of the insertion loss curve.
[0067] In other embodiments, the length of the routing unit 110 can also satisfy the following formula (2).
[0068] L m = (1 + k) m-1 × L1 (2)
[0069] wherein, L1 is the length of the first routing unit 110; L m is the length of the mth routing unit 110, m is a natural number; and k is an arbitrary decimal value.
[0070] For example, when k is 0.1, by calculation, L2 = 1.1L1, L3 = 1.21L1, L4 = 1.331L1, and the lengths of the subsequent routing units 110 are sequentially similar, which can also ensure that the lengths of any two routing units 110 are different and not in a multiple relationship.
[0071] In yet other embodiments, the plurality of routing units 110 of the routing 100 can be jointly formed by using the calculation methods of the above two formulas. Formula (1) can be used to define a part of the routing units 110, and formula (2) can be used to define another part of the routing units 110, which can also meet the requirement of avoiding resonance of the insertion loss curve.
[0072] In addition, it is worth noting that some de-embedding algorithms require the wiring structure 10 to be mirror image, and therefore, the wiring structure 10 of the present disclosure can also be arranged in a left-right mirror image or symmetrically.
[0073] Optionally, the plurality of routing units 110 are symmetrically arranged about the central axis 101 of the routing 100. The central axis 101 of the routing 100 is an axis that passes through the midpoint of the routing 100 and is perpendicular to the extension direction F of the routing, as shown inFigure 7 As shown, in some embodiments, the left and right portions of the trace 100 are mirror arranged with the middle axis 101 of the trace 100 as the symmetry axis, wherein the lengths of each trace unit 110 in the left portion of the trace 100 are different, and the lengths of any two trace units 110 are not in a multiple relationship. Then the right portion of the trace 100 is mirror arranged with the left portion, although the overall lengths of the trace 100 on the left and right sides of the middle axis 101 are the same, there are only two periodic structures, and the trace 100 about the middle axis 101 mirror arranged on the left and right sides will have two trace units 110 with the same length, but from simulation and actual measurement, no resonance will be generated. The fewer the number of the same trace units 110, the smaller the resonance, and when the resonance is small enough to be invisible, it can be considered that there is no resonance.
[0074] In the above embodiments, the left and right portions of the trace 100 are mirror arranged with the middle axis 101 as the symmetry axis, and the left and right portions of the trace 100 are arranged with gradually increasing and gradually decreasing lengths. It should be noted that in other embodiments, the lengths of the trace units 110 can also be arranged in a decreasing manner and in a disordered manner, and the space occupation can also be saved under the condition of not generating resonance.
[0075] As shown, Figure 9 According to the second aspect of the present disclosure, a return loss coban is also provided, the return loss coban includes the wiring structure 10 of any of the above embodiments, and the return loss coban can also include a body 20, and the wiring structure 10 is arranged in the body 20 to form the same structure and the trace 100 as the PCB, and the performance of the PCB is reflected by testing the return loss of the return loss coban. It should be noted that the return loss coban can also be used to measure the impedance characteristics of the PCB.
[0076] In addition, the return loss coban can also be the wiring structure 10 combined with the plurality of embodiments formed on the body 20, and therefore the return loss coban also has all the advantages of the above embodiments, which will not be described here.
[0077] The return loss coban and the wiring structure 10 thereof of the present disclosure, the trace 100 includes a plurality of trace units 110 with the bending portion 111, and at least part of the trace units 110 have different lengths. By arranging the bending portion 111 in the trace unit 110, the space perpendicular to the extension direction F of the trace can be fully utilized, and at the same time, the structure of at least part of the trace units 110 arranged in different lengths can also at least partially eliminate the resonance. Compared with the related art, the wiring structure 10 of the present disclosure has the advantages of small space occupation and reduced or no resonance in the return loss curve.
[0078] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
[0079] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.
[0080] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed in the present disclosure.
Claims
1. A wiring structure of a plug loss coban, characterized by, The wiring structure comprises a wire, the wire comprises a plurality of sequentially connected wire units, each of the wire units comprises a bending part, and the lengths of at least some of the wire units are different and in a non-multiple relationship.
2. The wiring structure according to claim 1, wherein The lengths of any two of the wire units are different, and the lengths of any two of the wire units are in a non-multiple relationship.
3. The wiring structure according to claim 1, wherein The lengths of the wire units gradually increase or gradually decrease along the extension direction of the wire.
4. The wiring structure according to claim 1, wherein The bending parts of the wire units are bent toward the same side of the extension direction of the wire.
5. The wiring structure according to claim 1, wherein The wire units further comprise connecting parts connected to at least one end of the bending parts, and the bending parts of two adjacent wire units are connected through the connecting parts.
6. The wiring structure according to claim 5, wherein The wire units are generally in the shape of a "U".
7. The wiring structure according to claim 6, wherein The lengths of the connecting parts are the same, and the lengths of the bending parts are different.
8. The wiring structure according to claim 7, wherein The depths and / or widths of the bending parts of the plurality of wire units are different.
9. The wiring structure according to claim 6, wherein The lengths of the bending parts are the same, and the lengths of the connecting parts are different.
10. The wiring structure according to any one of claims 1 to 9, wherein The lengths of the wire units satisfy the following formula: L m = (m-1) x k x 10 -n x L1 + L1 L1 is the length of the first routing unit; L m Lm is the length of the mth routing unit; k is an odd number; n is an integer greater than 0; or, The lengths of the wire units satisfy the following formula: L m = (1 + k) m-1 x L1 L1 is the length of the first routing unit; L m Lm is the length of the mth routing unit; k is an arbitrary decimal value.
11. The wiring structure according to claim 1, wherein The wire units are symmetrically arranged about the central axis of the wire.
12. An insertion loss coban characterized by, The insertion loss cable comprises the wiring structure according to any one of claims 1-11.