Insertion loss Kebang and wiring structure thereof

Abstract

The invention relates to an insertion loss Cobang and a wiring structure thereof, the wiring structure comprises a wiring, the wiring comprises a plurality of wiring units connected in sequence, each wiring unit comprises a bending part, and the lengths of part of the wiring units are different and are in a non-multiple relationship. The wiring structure is small in occupied space and at least partially eliminates resonance of an insertion loss curve.

Description

Technical Field

[0001] The present disclosure relates to the field of testing technologies, and in particular, to an insertion loss test coupon and its wiring structure. Background Art

[0002] Currently, for a PCB that needs to quantify the insertion loss of wiring, an insertion loss test coupon with the same stack-up structure is usually fabricated 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 related technologies, there are various wiring structures for insertion loss test coupons. 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 Invention

[0004] The purpose 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 lengths of the trace units are different and non-multiple relationships.

[0006] Optionally, the lengths of any two trace units are different, and the lengths of any two trace units are non-multiple relationships.

[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 are bent toward 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 lengths of the connecting portions are the same, and the lengths of the bent portions are different.

[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, and the connecting portions have different lengths.

[0014] Optionally, the length of the routing unit satisfies the following formula:

[0015] L m =(m-1)×k×10 -n ×L 1 +L 1

[0016] Among them, L 1 is the length of the first routing unit; L m is the length of the mth routing unit; k is an odd number; n is an integer greater than 0;

[0017] or,

[0018] The length of the routing unit satisfies the following formula:

[0019] L m =(1+k) m-1 ×L 1

[0020] Among them, L 1 is the length of the first routing unit; L m is the length of the mth routing unit; k is an arbitrary small value.

[0021] Optionally, a plurality of routing units are arranged symmetrically about a central axis of the routing.

[0022] According to a second aspect of the present disclosure, an insertion loss colback is also provided, and the insertion loss colback includes the above-mentioned wiring structure.

[0023] Through the above technical solution, that is, the wiring structure of the present invention, the routing includes a plurality of routing units with bending parts, and at least some of the routing units have different lengths and are non-multiple relationships. By setting the bending parts in the routing units, the space perpendicular to the extension direction of the routing can be fully utilized. At the same time, at least some of the routing units are set to have different lengths and are non-multiple relationships, which can at least partially eliminate the resonance of the insertion loss curve. Compared with the related art, the wiring structure of the present invention has the advantages of occupying less space and at least partially eliminating resonance.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 It is the S parameter curve of the insertion loss curve in the related art that produces resonance;

[0027] Figure 2 It is a schematic diagram of the wiring structure of the insertion loss Cobon provided in some embodiments of the present disclosure;

[0028] Figure 3 is a schematic diagram of the structure of a routing unit provided in some embodiments of the present disclosure;

[0029] Figure 4 It is a schematic diagram of the wiring structure of the insertion loss Cobon provided by other embodiments of the present disclosure;

[0030] Figure 5 It is a schematic diagram of the wiring structure of the insertion loss Cobon provided by some other embodiments of the present disclosure;

[0031] Figure 6 It is a schematic diagram of the wiring structure of the insertion loss Cobon provided in some embodiments of the present disclosure;

[0032] Figure 7 It is a schematic diagram of the wiring structure of the insertion loss Cobon provided in some embodiments of the present disclosure;

[0033] Figure 8 is an S parameter curve of an insertion loss curve in a wiring structure of insertion loss Cobon provided in some embodiments of the present disclosure;

[0034] Fig. 9 It is a schematic diagram of the structure of the insertion loss Cobon provided in some embodiments of the present disclosure.

[0035] Description of Reference Numerals

[0036] 10-wiring structure; 100-wiring; 101-central axis; 110-wiring unit; 111-bending portion; 1111-first section; 1112-second section; 1113-third section; 112-connecting portion;

[0037] 20-Ontology. DETAILED DESCRIPTION

[0038] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0039] In the present disclosure, unless otherwise stated, directional words such as "left and right" generally refer to left and right relative to the accompanying drawings; "inside and outside" refer to the inside and outside of the outline of the corresponding component; "far and near" refer to the corresponding structure or the corresponding component being away from or close to another structure or component. F in the accompanying drawings of the present disclosure represents the direction in which the routing extends. In addition, the terms "first", "second", etc. used in the present disclosure are intended to distinguish one element from another and do not have order or importance. In addition, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as limitations on the present disclosure.

[0040] For the PCB (defined as board A) that needs to quantify the insertion loss of the wiring, a separate PCB (defined as board B) with the same stacking structure will be made. The PCB (board B) is designed with the same wiring layer as the PCB (board A), impedance lines with the same line width / line spacing, and test interfaces. By testing the insertion loss of the wiring on the PCB (board B) and running the corresponding de-embedding algorithm to remove the influence of the test interface, the insertion loss of the wiring per unit length on the PCB (board B) can be obtained. Because the stacking of PCB (board A) and PCB (board B) is the same, the layer where the impedance line is located, the line width, and the line spacing are the same, the insertion loss of the wiring per unit length of PCB (board A) can also be obtained. PCB (board B) is called Insertion Loss Test Coupon.

[0041] In the related art, the wiring structures of insertion loss Cobon usually include straight line structure, periodic winding structure and serpentine line structure. Among them, the advantage of the straight line structure is that the design is simple, but it occupies a large PCB space; and due to the glass fiber effect, the insertion loss curve is prone to resonance. The advantage of the periodic winding structure is that the design is simple and occupies a small PCB space, but due to the existence of a large number of periodic structures, the insertion loss curve is prone to resonance. The serpentine line structure avoids both the glass fiber effect and a large number of periodic structures, and the insertion loss curve will not resonate; but it occupies a large PCB space.

[0042] like Figure 1 As shown in the figure, the insertion loss curve produces a resonant S-parameter curve due to the glass fiber effect or the presence of a large number of periodic structures in the wiring, as shown in the three small drop areas on the curve in the figure.

[0043] As described above, none of the three existing wiring structures can simultaneously achieve an insertion loss curve without resonance and occupy a small PCB space.

[0044] Based on this, the purpose of the present disclosure is to provide an insertion loss colbond and a wiring structure thereof, wherein the wiring structure 10 has the advantages of occupying a small space and at least partially eliminating the resonance of the insertion loss curve.

[0045] In order to achieve the above purpose, Figures 2 to 8 As shown, according to the first aspect of the present disclosure, a wiring structure of insertion loss Cobon is provided, the wiring structure 10 includes a routing line 100, the routing line 100 includes a plurality of routing units 110 connected in sequence, each routing unit 110 includes a bending portion 111, and the lengths of at least some of the routing units 110 are different and are in a non-multiple relationship.

[0046] Through the above technical solution, the routing 100 of the wiring structure 10 disclosed in the present invention includes a plurality of routing units 110 with bending portions 111, and at least some of the routing units 110 have different lengths and are in a non-multiple relationship. By setting the bending portions 111 in the routing units 110, the space perpendicular to the routing extension direction F can be fully utilized. At the same time, at least some of the routing units 110 are set to have different lengths and are in a non-multiple relationship, which can at least partially eliminate the resonance of the insertion loss curve. Compared with the related art, the wiring structure 10 disclosed in the present invention has the advantages of occupying a small space and at least partially eliminating the resonance of the insertion loss curve.

[0047] It should be noted that the routing extension direction F refers to the direction from one end of the routing 100 toward the other end of the routing 100. Compared with the straight line structure and the serpentine line structure in the related art, since the routing unit 110 of the wiring structure 10 includes a bending portion 111, it can extend a certain distance perpendicular to the routing extension direction F. Therefore, the length of the entire routing 100 can be reduced, and the occupied space can be saved. At the same time, in the wiring structure 10, at least some of the routing units 110 have different lengths and are non-multiple relationships. Compared with the periodic winding structure in the related art, it can at least partially eliminate resonance.

[0048] It is understandable that the wiring structure 10 may also include a terminal connected to the end of the wiring 100 for connecting to an external circuit or a test circuit. Of course, the wiring structure 10 also includes other components necessary for the insertion loss test, which can be selected and installed according to relevant technologies and will not be repeated here.

[0049] In some embodiments, the lengths of any two routing units 110 are different, and the lengths of any two routing units 110 are non-multiple relations. Among them, the lengths of any two routing units 110 are different, and among any two routing units 110, one routing unit 110 will not be an integer multiple of the length of another routing unit 110. Therefore, on the entire routing 100, any two routing units 110 will not cause the insertion loss curve to resonate due to the same length, thereby improving the accuracy of the insertion loss test.

[0050] It is understandable that the lengths of the plurality of routing units 110 may all increase sequentially, or may decrease or be arranged in a random order, as long as the lengths of any two routing units 110 are not equal and are not in a multiple relationship.

[0051] In some embodiments, the length of the routing unit 110 gradually increases along the extension direction of the routing 100. Among them, from one end of the routing 100 to the other end, the length of the plurality of routing units 110 gradually increases. Of course, in other embodiments, from one end of the routing 100 to the other end, the length of the plurality of routing units 110 may also gradually decrease. In some other embodiments, from one end of the routing 100 to the other end, the length of the plurality of routing units 110 is disordered, that is, there is no pattern, and some are long and some are short and are randomly arranged.

[0052] The bending portion 111 is concave or convex in a direction perpendicular to the extension direction F of the wiring. Figure 2 As shown, in some embodiments, the bending portion 111 of the routing unit 110 is bent toward the same side of the routing extension direction F. That is, the depression or protrusion forming the bending portion 111 is on the same side of the routing extension direction F, and the depression or protrusion can occupy the space of the insertion loss colbond perpendicular to the routing extension direction F, thereby reducing the length of the routing extension direction F, so as to reduce the overall size occupation.

[0053] It should be noted that the above-mentioned depression or protrusion forming the bending portion 111 may also extend to opposite sides of the routing extension direction F. For example, the bending portion 111 may be a protrusion, with one part extending to one side and the other part extending to the other opposite side. Since the lengths of any two routing units 110 are different and the relationship between the two is not a multiple, resonance can also be avoided while reducing space occupation.

[0054] The routing unit 110 can be constructed using any structure including a bending portion 111, such as Figure 2 and Figure 3 As shown, in some embodiments, the routing unit 110 further includes a connection portion 112 connected to at least one end of the bending portion 111, and the bending portions 111 of two adjacent routing units 110 are connected via the connection portion 112. The connection portion 112 is connected to one end of the bending portion 111, and the connection portion 112 of one routing unit 110 is connected to one end of the bending portion 111 of another routing unit 110 away from its corresponding connection portion 112, thereby realizing the connection of multiple routing units 110.

[0055] For example, the wiring unit 110 may further include a bending portion 111 and connecting portions 112 connected to opposite ends of the bending portion 111. The bending portions 111 of two adjacent wiring units 110 are connected by the two connecting portions 112, and the connection of multiple wiring units 110 can also be achieved in this way.

[0056] The shape of the wiring unit 110 can be any suitable structure. In some embodiments, the wiring unit 110 is generally in a "Ji" shape. Herein, the "Ji" shape is formed by the bending portion 111 and at least one connecting portion 112. For example, the "Ji" 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 in the present disclosure can also be, for example, an N shape or an M shape, as long as it can occupy space perpendicular to the wiring extension direction to save space.

[0057] Multiple wiring units 110 of the wiring 100 can all be composed of the bending portion 111 and the connecting portion 112. By precisely controlling the lengths of each bending portion 111 and / or connecting portion 112, it is ensured that the lengths of each wiring unit 110 are different, and the lengths of any two wiring units 110 are not in a multiple relationship, so as to destroy the periodic structure of the wiring, thereby avoiding resonance.

[0058] To ensure that the lengths of multiple wiring units 110 are different and the lengths of any two wiring units 110 are not in a multiple relationship, it can be achieved by adjusting the lengths of the bending portion 111 and / or the connecting portion 112. As Figure 2 shown, in some embodiments, the lengths of the connecting portions 112 of each wiring unit 110 are the same, while 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, it is realized that the lengths of any two wiring units 110 among multiple wiring units 110 are different and not in a multiple relationship, while saving space occupancy and avoiding resonance at the same time.

[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 as to obtain that the lengths of each wiring unit 110 are different and not in a multiple relationship between any two of them. As Figure 4 and Figure 6 shown, among multiple wiring units 110, the depth D and / or width W of the bending portion 111 are different. Herein, as Figure 3As shown, the bending portion 111 may 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, the second segment 1112 is located between the first segment 1111 and the third segment 1113 and is respectively connected to one end of the first segment 1111 and the second segment 1112 away from the connecting portion 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 respectively 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 portion 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 portion 111. By adjusting the depth D of the bending portion 111 (i.e., the length of the first section 1111 and the third section 1113), the length of the entire routing unit 110 can be adjusted; at the same time, by adjusting the width W of the bending portion 111 (i.e., the distance between the first section 1111 and the third section 1113, or the length of the second section 1112), the length of the entire routing unit 110 can also be adjusted.

[0060] like Figure 6 As shown, in other embodiments, in a plurality of routing units 110, the length of each bending portion 111 is the same, while the length of the connecting portion 112 is different. By changing the length of the connecting portion 112, it is also possible to achieve that the lengths of the plurality of routing units 110 are different, and any two of them are not in a multiple relationship, thereby saving space and avoiding resonance.

[0061] In the routing 100 of the insertion loss Cobon wiring structure 10, when the number of routing units 110 is large, it is difficult to ensure that the lengths of any two routing units 110 are not equal and are not in a multiple relationship. Therefore, some operational embodiments are given here to further illustrate how to design the length of the routing unit 110.

[0062] The length of the routing unit 110 is preferably able to satisfy a certain rule or be defined by a formula, so as to avoid confusion of the lengths of multiple routing units 110. In some embodiments, the length of the routing unit 110 of the routing 100 satisfies the following formula (1):

[0063] L m =(m-1)×k×10 -n ×L 1 +L 1 (1)

[0064] Among them, L 1 is the length of the first routing unit 110; L m is the length of the mth routing 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 L 1 , the length L of the second routing unit 110 2 =1.3L 1 , the length L of the third routing unit 110 3 =1.6L 1 , the length L of the fourth routing unit 110 4 =1.9L 1 , and the following routing units 110 are analogous. This can ensure that the lengths of any two routing units 110 are different and will not be in multiples, thus avoiding the resonance of the insertion loss curve. At the same time, since the routing adopts a new winding structure (i.e., the bending part), the space occupied by the insertion loss can be greatly reduced.

[0066] like Figure 8 As shown, the insertion loss curve of the wiring structure is formed by calculating the length of each wiring unit 110 with a wiring length of 5 inches and using the above formula. When k=0.3, it can be seen from the figure that no resonance is generated. Therefore, it is proved that the wiring (wiring structure) formed by the formula and the above method can avoid the resonance of the insertion loss curve.

[0067] In some other embodiments, the length of the routing unit 110 may also satisfy the following formula (2).

[0068] L m =(1+k) m-1 ×L 1 (2)

[0069] Among them, L 1 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, L 2 =1.1L 1 , L 3 =1.21L 1 , L 4 =1.331L 1 , and so on, it can be ensured that the lengths of any two routing units 110 are different and not in a multiple relationship.

[0071] In some other embodiments, the multiple routing units 110 of the routing 100 can be jointly constructed using the calculation methods in 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 caused by the insertion loss curve.

[0072] It is also worth noting that some de-embedding algorithms require the wiring structure 10 to be mirrored, therefore, the wiring structure 10 of the present disclosure may also be arranged in a left-right mirrored manner or in a symmetrical manner.

[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 passing through the midpoint of the routing 100 and perpendicular to the routing extension direction F. Figure 7 As shown, in some embodiments, the central axis 101 of the routing 100 is used as the axis of symmetry, and the left and right parts of the routing 100 are arranged in a mirror image, wherein the length of each routing unit 110 of the left part of the routing 100 is different, and the lengths of any two routing units 110 are not in a multiple relationship. Then the right part of the routing 100 is mirrored. Although the overall length of the routing 100 on the left and right sides of the central axis 101 is the same, there are only two periodic structures. The routing 100 mirrored on the left and right sides of the central axis 101 will have two routing units 110 with the same length, but no resonance will be generated from simulation and actual measurement. The fewer the number of identical routing units 110, the smaller the resonance. When the resonance is so small that it is invisible, it can be considered that there is no resonance.

[0074] In the above embodiment, the routing 100 is arranged in a mirror image on the left and right sides of the central axis 101, and the left and right parts of the routing 100 are arranged in gradually increasing and decreasing lengths. It should be noted that in other embodiments, the length of the routing unit 110 can also be decreased and arranged in a random order, which can also save space while not generating resonance.

[0075] like Fig. 9 As shown, according to the second aspect of the present disclosure, an insertion loss cobond is also provided, the insertion loss cobond includes the wiring structure 10 of any of the above embodiments, and the insertion loss cobond may also include a body 20, the wiring structure 10 is arranged on the body 20, and is used to form a structure and routing 100 that is the same as a PCB. The insertion loss of the insertion loss cobond is tested to reflect the performance of the PCB. It should be noted that the insertion loss cobond can also be used to measure the impedance characteristics of the PCB.

[0076] In addition, the insertion loss colback can also be a wiring structure 10 formed by combining multiple embodiments on the main body 20. Therefore, the insertion loss colback also has all the advantages of the above embodiments, which will not be described one by one here.

[0077] The insertion loss Cobond and its wiring structure 10 disclosed in the present invention, the wiring 100 includes a plurality of wiring units 110 with bending portions 111, and at least some of the wiring units 110 have different lengths. By setting the bending portions 111 in the wiring units 110, the space perpendicular to the wiring extension direction F can be fully utilized. At the same time, at least some of the wiring units 110 are set to structures with different lengths, which can at least partially eliminate resonance. Compared with the related art, the wiring structure 10 disclosed in the present invention has the advantages of small space occupation, reduced insertion loss curve or no resonance.

[0078] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0080] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A wiring structure of insertion loss Colback, characterized in that: 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.

2. The wiring structure according to claim 1, characterized in that: The lengths of any two of the trace units are different, and the lengths of any two of the trace units are not in a multiple relationship.

3. The wiring structure according to claim 1, characterized in that: Along the extending direction of the trace, the lengths of the trace units gradually increase or gradually decrease.

4. The wiring structure according to claim 1, characterized in that: The bent portion of the trace unit bends toward the same side of the extending direction of the trace.

5. The wiring structure according to claim 1, characterized in that: The trace unit further includes a connecting portion connected to at least one end of the bent portion, and the bent portions of two adjacent trace units are connected through the connecting portion.

6. The wiring structure according to claim 5, characterized in that: The trace unit is generally in a "U" shape.

7. The wiring structure according to claim 6, characterized in that: The lengths of the connecting portions are the same, and the lengths of the bent portions are different.

8. The wiring structure according to claim 7, characterized in that: Among the plurality of trace units, the depths and / or widths of the bent portions are different.

9. The wiring structure according to claim 6, characterized in that: The lengths of the bent portions are the same, and the lengths of the connecting portions are different.

10. The wiring structure according to any one of claims 1 to 9, characterized in that: The length of the trace unit satisfies the following formula: L m =(m-1)×k×10 -n ×L1+L1 Where, L1 is the length of the first routing unit; L m is the length of the mth routing unit; k is an odd number; n is an integer greater than 0; Or, The length of the trace unit satisfies the following formula: L m =(1+k) m-1 ×L1 Where, L1 is the length of the first routing unit; L m is the length of the mth routing unit; k is an arbitrary small value.

11. The wiring structure according to claim 1, characterized in that: The plurality of trace units are symmetrically arranged with respect to the central axis of the trace.

12. An insertion loss Colbond, characterized in that: The insertion loss Keben includes the wiring structure according to any one of claims 1-11.

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