CN118016369A - Terahertz Goubau transmission line - Google Patents
Terahertz Goubau transmission line Download PDFInfo
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- CN118016369A CN118016369A CN202311687183.4A CN202311687183A CN118016369A CN 118016369 A CN118016369 A CN 118016369A CN 202311687183 A CN202311687183 A CN 202311687183A CN 118016369 A CN118016369 A CN 118016369A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 78
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 86
- 229910052751 metal Inorganic materials 0.000 claims description 86
- 239000004020 conductor Substances 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The specification discloses a terahertz Goubau transmission line, which aims to solve the problems that the traditional transmission line cannot meet the application requirements of terahertz picosecond transmission, high-rate data transmission, low-loss, low-dispersion transmission and the like, and comprises the following components: the coaxial test joint part, the conical gradual change part and the Goubau transmission line are connected in sequence; the coaxial test joint part and the conical gradual change part are conversion structures of the Goubau transmission line; the coaxial test joint portion and the tapered transition portion are symmetrically disposed along a center of the Goubau transmission line in a length direction. The invention can make waves propagate in the coaxial inner core, reduce processing difficulty and processing cost, reduce loss, and can meet application requirements of terahertz picosecond transmission, high-rate data transmission, low-loss and low-dispersion transmission and the like.
Description
Technical Field
The present document relates to the field of communications technologies, and in particular, to a terahertz Goubau transmission line.
Background
With the rapid development of 6G/terahertz, a broadband transmission line has great development potential as a front-end design. The transmission line is a medium for guiding electromagnetic wave to propagate, and is also an important component part of terahertz devices and circuits, and the characteristics of the transmission line directly affect the bandwidth, the size and the functions of the system. In fact, the transmission line is the basis of all high frequency integrated circuits, and its performance factors and cost metrics are limited by the transmission line.
Some classical transmission lines, like coaxial lines, rectangular waveguides, substrate integrated waveguides, microstrip lines, coplanar waveguides, have become the support of modern electronic integrated circuits and communication systems. However, these transmission lines have extremely high dielectric loss, metal loss, and radiation loss when used in the terahertz frequency band and above. In addition, the transmission line also has the problems of signal loss, attenuation and the like, and the propagation loss is too large, so that the propagation of signals is greatly influenced. The coaxial line is multimode along with the rise of frequency, and the transmission line is in high-order mode mixing at the moment, so that the coaxial line is limited to be applied to the THz frequency band; the coaxial line has extremely large dispersion at high frequency, and the conventional transmission line can not meet the application requirements of terahertz picosecond transmission, high-rate data transmission, low loss, low dispersion transmission and the like.
Accordingly, there is a need to provide a terahertz Goubau transmission line.
Disclosure of Invention
The specification provides a terahertz Goubau transmission line, which is used for solving the problems that the traditional transmission line cannot meet the application requirements of terahertz picosecond transmission, high-rate data transmission, low-loss, low-dispersion transmission and the like.
The terahertz Goubau transmission line provided by the invention comprises a coaxial test joint part, a conical gradual change part and a Goubau transmission line which are connected in sequence;
The coaxial test joint part and the conical gradual change part are conversion structures of the Goubau transmission line; the coaxial test joint portion and the tapered transition portion are symmetrically disposed along a center of the Goubau transmission line in a length direction.
In some preferred embodiments, the coaxial test joint portion includes a first metal inner core, a first dielectric layer, and a first metal outer conductor;
the first metal inner core is arranged at the innermost side of the coaxial test joint part, the outer surface of the first metal inner core is covered with the first dielectric layer, the outer surface of the first dielectric layer is covered with the first metal outer conductor, and the first metal outer conductor is arranged at the outermost side of the coaxial test joint part.
In some preferred embodiments, the tapered portion comprises a second metal core and a second dielectric layer;
One end of the second metal inner core is connected with the first metal inner core, the outer surface of the second metal inner core is covered with the second dielectric layer, and one end of the second dielectric layer is connected with the first dielectric layer; the second dielectric layer is arranged in a conical shape.
In some preferred embodiments, the second dielectric layer is configured as a cone, and its specific structure is:
The second dielectric layer is arranged in a gradual change mode from width to narrow along the length direction far away from the coaxial test joint part.
In some preferred embodiments, the Goubau transmission line comprises a third metal core and a third dielectric layer;
The third metal inner core is connected with the other end of the second metal inner core, the outer surface of the third metal inner core is covered with the third medium layer, and the third medium layer is connected with the other end of the second medium layer.
In some preferred embodiments, the first metal core, the second metal core, and the third metal core form a unitary core.
In some preferred embodiments, the first dielectric layer, the second dielectric layer, and the third dielectric layer form a unitary dielectric layer.
In some preferred embodiments, the first dielectric layer, the second dielectric layer, and the third dielectric layer are used to reduce radiation loss.
In some preferred embodiments, the coaxial test joint portion and the tapered portion are symmetrically arranged along a center of the Goubau transmission line in a length direction, specifically:
The first metal inner core, the first dielectric layer, the first metal outer conductor, the second metal inner core and the second dielectric layer are symmetrically arranged along the center of the Goubau transmission line in the length direction.
In some preferred embodiments, the material of the first metal core, the second metal core, and the third metal core comprises copper.
The above-mentioned at least one technical scheme that this description embodiment adopted can reach following beneficial effect:
The terahertz Goubau transmission line provided by the invention enables waves to propagate in the coaxial inner core, reduces processing difficulty and processing cost, reduces loss, and can meet application requirements of terahertz picosecond transmission, high-rate data transmission, low-loss, low-dispersion transmission and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic diagram of the overall structure of a terahertz Goubau transmission line and a conversion structure thereof according to an embodiment of the present disclosure;
Fig. 2 is an xoy cross-sectional view of a terahertz Goubau transmission line according to an embodiment of the present disclosure;
Fig. 3 is a simulation result of parameters S 11 and S 21 of a terahertz Goubau transmission line and a conversion structure thereof according to an embodiment of the present disclosure;
fig. 4 is a diagram showing the metal loss, dielectric loss and radiation loss of a terahertz Goubau transmission line according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to fig. 1 to fig. 2.
Fig. 1 is a terahertz Goubau transmission line according to an embodiment of the present disclosure, including: a coaxial test joint part 1, a conical gradual part 2 and a Goubau transmission line 3 which are connected in sequence;
the coaxial test joint part 1 and the conical gradual part 2 are conversion structures of the Goubau transmission line 3; the coaxial test joint part 1 and the tapered gradual part 2 are arranged symmetrically along the center of the length direction of the Goubau transmission line 3.
As a further explanation of the present invention, referring to fig. 1,2, the coaxial test joint portion 1 includes a first metal inner core 4-1, a first dielectric layer 5-1, and a first metal outer conductor 6;
The first metal inner core 4-1 is arranged at the innermost side of the coaxial test joint part 1, the outer surface of the first metal inner core 4-1 is covered with the first dielectric layer 5-1, the outer surface of the first dielectric layer 5-1 is covered with the first metal outer conductor 6, and the first metal outer conductor 6 is arranged at the outermost side of the coaxial test joint part 1.
Wherein, in the present embodiment, the diameter of the first metal core 4-1 is 0.02mm, and the length along the z-axis is 1mm; the diameter of the first dielectric layer 5-1 covering the outer side of the first metal inner core 4-1 is 0.18mm, and the length along the z axis is 1mm; the first metal outer conductor 6 covering the outside of the first dielectric layer 5-1 has a diameter of 0.4mm and a length along the z-axis of 1mm.
In this embodiment, the z-axis is the length direction of the terahertz Goubau transmission line, the y-axis is the width direction, and the x-axis is the height direction.
Wherein the first metal inner core 4-1, the first dielectric layer 5-1 and the first metal outer conductor 6 are coaxially arranged.
As a further explanation of the present invention, referring to fig. 1, the tapered portion 2 includes a second metal core 4-2 and a second dielectric layer 5-2;
One end of the second metal inner core 4-2 is connected with the first metal inner core 4-1, the outer surface of the second metal inner core 4-2 is covered with the second dielectric layer 5-2, and one end of the second dielectric layer 5-2 is connected with the first dielectric layer 5-1; the second dielectric layer 5-2 is arranged in a tapered shape.
Wherein the second metal inner core 4-2 and the second dielectric layer 5-2 are coaxially arranged.
As a further explanation of the present invention, referring to fig. 1, the second dielectric layer 5-2 is configured as a taper, and its specific structure is:
The second dielectric layer 5-2 is arranged gradually from wide to narrow in a length direction away from the coaxial test joint part 1. In other words, the second dielectric layer 5-2 is gradually reduced in diameter in the z-axis direction in fig. 1.
Wherein, in the present embodiment, the diameter of the second metal core 4-2 constituting the tapered taper structure 2 is 0.02mm, and the length along the z-axis is 0.22mm; the diameter of the two dielectric layers 5-2 covering the outer side of the second metal inner core 4-2 is gradually changed from 0.18mm to 0.04mm along the z-axis inward taper, and the gradual change length is 1mm.
As a further explanation of the present invention, the Goubau transmission line 3 includes a third metal core 4-3 and a third dielectric layer 5-3;
the third metal inner core 4-3 is connected with the other end of the second metal inner core 4-2, the outer surface of the third metal inner core 4-3 is covered with the third dielectric layer 5-3, and the third dielectric layer 5-3 is connected with the other end of the second dielectric layer 5-2.
Wherein the third metal inner core 4-3 and the third dielectric layer 5-3 are coaxially arranged.
Wherein the diameter of the third metal inner core 4-3 of the Goubau transmission line 3 is 0.02mm, and the length along the z-axis is 1mm; the third dielectric layer 5-3 covering the outside of the third metal core 4-3 has a diameter of 0.04mm and a length along the z-axis of 1mm.
As a further explanation of the present invention, the first metal core 4-1, the second metal core 4-2 and the third metal core 4-3 constitute one integral core.
As a further explanation of the present invention, the first dielectric layer 5-1, the second dielectric layer 5-2 and the third dielectric layer 5-3 constitute one integral dielectric layer.
Wherein, the first dielectric layer 5-1, the second dielectric layer 5-2 and the third dielectric layer 5-3 in the present embodiment are made of a Teflon material with a relative dielectric constant of 2.1, and the loss tangent thereof is 0.001; the first metal core 4-1, the second metal core 4-2, and the third metal core 4-3 use a metallic copper material.
As a further explanation of the present invention, the first dielectric layer 5-1, the second dielectric layer 5-2 and the third dielectric layer 5-3 serve to reduce radiation loss.
As a further explanation of the present invention, the coaxial test joint portion 1 and the tapered portion 2 are arranged symmetrically along the center of the length direction of the Goubau transmission line 3, specifically:
the first metal inner core 4-1, the first dielectric layer 5-1, the first metal outer conductor 6, the second metal inner core 4-2 and the second dielectric layer 5-2 are arranged symmetrically along the center of the Goubau transmission line 3 in the length direction.
As a further explanation of the present invention, the materials of the first metal core 4-1, the second metal core 4-2, and the third metal core 4-3 include copper.
In fig. 3, the simulation results of S parameters of the transmission line and the conversion structure show that in the range of 200 GHz-1000 GHz, the return loss |s11| is better than 10dB, the insertion loss |s21| in the same frequency band is better than 4dB, and the total length of the transmission line and the conversion structure thereof is 5mm, thereby meeting the design requirements.
Fig. 4 shows the metal loss, dielectric loss and radiation loss of the transmission line and the conversion structure, and it can be seen that the radiation loss is more in the range of 200GHz to 1000GHz, which is determined by the transmission characteristics of the Goubau transmission line.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. A terahertz Goubau transmission line, comprising: the coaxial test joint part (1), the conical gradual change part (2) and the Goubau transmission line (3) are connected in sequence;
The coaxial test joint part (1) and the conical gradual part (2) are conversion structures of the Goubau transmission line (3); the coaxial test joint part (1) and the conical gradual part (2) are symmetrically arranged along the center of the length direction of the Goubau transmission line (3).
2. The terahertz Goubau transmission line according to claim 1, characterized in that the coaxial test connector portion (1) comprises a first metal inner core (4-1), a first dielectric layer (5-1) and a first metal outer conductor (6);
The first metal inner core (4-1) is arranged at the innermost side of the coaxial test joint part (1), the outer surface of the first metal inner core (4-1) is covered with the first dielectric layer (5-1), the outer surface of the first dielectric layer (5-1) is covered with the first metal outer conductor (6), and the first metal outer conductor (6) is arranged at the outermost side of the coaxial test joint part (1).
3. A terahertz Goubau transmission line in accordance with claim 2, characterized in that the tapered portion (2) comprises a second metal core (4-2) and a second dielectric layer (5-2);
One end of the second metal inner core (4-2) is connected with the first metal inner core (4-1), the second medium layer (5-2) is covered on the outer surface of the second metal inner core (4-2), and one end of the second medium layer (5-2) is connected with the first medium layer (5-1); the second dielectric layer (5-2) is arranged in a conical shape.
4. A terahertz Goubau transmission line according to claim 3, characterized in that the second dielectric layer (5-2) is provided in a tapered shape, which has the following specific structure:
The second dielectric layer (5-2) is arranged in a gradual manner from width to width along the length direction far away from the coaxial test joint part (1).
5. A terahertz Goubau transmission line according to claim 4, characterized in that the Goubau transmission line (3) comprises a third metal core (4-3) and a third dielectric layer (5-3);
The third metal inner core (4-3) is connected with the other end of the second metal inner core (4-2), the outer surface of the third metal inner core (4-3) is covered with the third dielectric layer (5-3), and the third dielectric layer (5-3) is connected with the other end of the second dielectric layer (5-2).
6. The terahertz Goubau transmission line according to claim 5, wherein the first metal core (4-1), the second metal core (4-2) and the third metal core (4-3) form a monolithic core.
7. The terahertz Goubau transmission line according to claim 6, wherein the first dielectric layer (5-1), the second dielectric layer (5-2) and the third dielectric layer (5-3) constitute one integral dielectric layer.
8. The terahertz Goubau transmission line according to claim 7, wherein the first dielectric layer (5-1), the second dielectric layer (5-2) and the third dielectric layer (5-3) are used to reduce radiation losses.
9. The terahertz Goubau transmission line according to claim 8, wherein the coaxial test connector portion (1) and the tapered portion (2) are arranged symmetrically along the center of the length direction of the Goubau transmission line (3), specifically:
The first metal inner core (4-1), the first dielectric layer (5-1), the first metal outer conductor (6), the second metal inner core (4-2) and the second dielectric layer (5-2) are symmetrically arranged along the center of the Goubau transmission line (3) in the length direction.
10. The terahertz Goubau transmission line according to claim 9, wherein the material of the first metal core (4-1), the second metal core (4-2) and the third metal core (4-3) comprises copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311687183.4A CN118016369A (en) | 2023-12-08 | 2023-12-08 | Terahertz Goubau transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311687183.4A CN118016369A (en) | 2023-12-08 | 2023-12-08 | Terahertz Goubau transmission line |
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| CN118016369A true CN118016369A (en) | 2024-05-10 |
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| CN202311687183.4A Pending CN118016369A (en) | 2023-12-08 | 2023-12-08 | Terahertz Goubau transmission line |
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| Country | Link |
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| CN (1) | CN118016369A (en) |
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- 2023-12-08 CN CN202311687183.4A patent/CN118016369A/en active Pending
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