CN111786064A - Asymmetric phase compensation differential transmission line - Google Patents
Asymmetric phase compensation differential transmission line Download PDFInfo
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- CN111786064A CN111786064A CN202010620558.5A CN202010620558A CN111786064A CN 111786064 A CN111786064 A CN 111786064A CN 202010620558 A CN202010620558 A CN 202010620558A CN 111786064 A CN111786064 A CN 111786064A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
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Abstract
The invention provides an asymmetric phase compensation differential transmission line, wherein a differential transmission line pair is arranged between a first ground wall and a second ground wall at intervals and comprises a first transmission line and a second transmission line; the first transmission line comprises a fifth section which is parallel to the first section and is arranged at intervals and a sixth section which is extended straight from the fifth section and is parallel to the second section and is arranged at intervals; the second transmission line comprises a seventh segment which is parallel to and spaced from the fifth segment and an eighth segment which is straightly extended from the seventh segment and is parallel to and spaced from the sixth segment; the head ends of the first end, the third end, the fifth section and the seventh section are mutually flush; the tail ends of the second section, the fourth section, the sixth section and the eighth section are mutually flush; the width of the first transmission line is greater than the width of the second transmission line. Compared with the prior art, the asymmetric phase compensation differential transmission line has the advantages of good performance, high design freedom degree and wide application range.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an asymmetric phase compensation differential transmission line.
Background
With the development of mobile communication technology, mobile phones, PADs, notebook computers, etc. have become indispensable electronic products in life, and such electronic products are all updated to electronic communication products with communication functions by adding antenna systems.
The differential transmission line is widely applied to microwave, millimeter wave and terahertz circuit design and comprises two ground wall lines which are arranged in parallel at intervals and a differential signal line pair which is arranged between the two ground wall lines at intervals. The differential transmission line pair is highly immune to external electromagnetic interference, an external interference signal affects each end of the differential signal line pair to almost the same extent, and the output signal value of the differential signal is determined by the voltage difference of two signal lines of the differential signal line pair, so that any same interference occurring on the differential signal pair is ignored. In addition, no virtual ground needs to be provided for the signal line, because the middle point of the differential transmission signal is a natural virtual point, so that the bipolar signal has high fidelity in processing and propagation. Ideally, the two signal lines constituting the differential transmission line have the same amplitude and opposite phases, so that when the circuit is laid, the signal lines of the differential transmission line must be two signal lines which are equal in length, equal in width, close to each other and on the same layer.
However, microwave, millimeter wave and terahertz signals have higher frequencies and larger spatial transmission path loss compared with low-frequency communication, and in order to meet the requirement of transmission distance for future ultra-high-speed communication applications, a multiple-input multiple-output array system (Multi-input multiple-output) is widely applied to a 5G communication system, and at this time, in the design of an actual array system, a quarter turn structure inevitably occurs due to the consideration of symmetry of the whole system structure and optimization of layout area, and the quarter turn structure causes length deviation of two signal lines in a differential signal line pair, and the length deviation can exceed 2 degrees of electrical length when the frequency is higher. Therefore, a pair of signal lines with balanced amplitude and phase passes through the quarter turn structure at the input end of the differential transmission line, and if the widths of the signal lines are the same (namely, the characteristic impedances are the same), the amplitude and the phase of the two signal lines are greatly deviated when reaching the output end, so that the performance of the whole array system is greatly influenced. If the right-angle transformation structure is not used, the design and application range is severely limited.
Therefore, it is necessary to provide a new asymmetric phase compensation differential transmission line to solve the above problems.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an asymmetric phase compensation differential transmission line with good performance and wide application range.
In order to solve the above technical problem, the present invention provides an asymmetric phase compensation differential transmission line, including:
a first wall liner comprising a first section and a second section extending vertically from a trailing end of the first section;
the second floor comprises a third section and a fourth section, wherein the third section is parallel to the first section and is arranged at intervals, and the fourth section vertically extends from the tail end of the third section and is parallel to the second section and is arranged at intervals; the first ground wall line and the second ground wall line are used for shielding adjacent signal coupling interference; and the number of the first and second groups,
the differential transmission line pair is arranged between the first ground wall line and the second ground wall line at intervals and comprises a first transmission line and a second transmission line which are arranged at intervals; the first transmission line comprises a fifth section and a sixth section, wherein the fifth section is parallel to the first section and is arranged at intervals, and the sixth section vertically extends from the tail end of the fifth section and is parallel to the second section and is arranged at intervals; the second transmission line comprises a seventh segment parallel to and spaced from the fifth segment and an eighth segment vertically extending from a tail end of the seventh segment and parallel to and spaced from the sixth segment;
the head end of the first end, the head end of the third end, the head end of the fifth section and the head end of the seventh section are flush with each other and form a signal input end together; the tail end of the second section, the tail end of the fourth section, the tail end of the sixth section and the tail end of the eighth section are flush with each other and form a signal output end together;
the width of the first transmission line is greater than the width of the second transmission line.
Preferably, the ratio of the width of the first transmission line to the width of the second transmission line is 1.1-1.2.
Preferably, the ratio of the width of the first transmission line to the width of the second transmission line is 1.2.
Preferably, the interval from the first ground wall line to the first transmission line is equal to the interval from the second ground wall line to the second transmission line.
Preferably, the difference between the length of the first transmission line and the length of the second transmission line is equal to twice the sum of the interval between the first transmission line and the second transmission line and the width of the first transmission line.
Compared with the prior art, in the asymmetric phase compensation differential transmission line, the first transmission line comprises a fifth section and a sixth section which vertically extends from the tail end of the fifth section to form a vertical corner structure, and the fifth section is parallel to the first section of the first ground wall line, and the sixth section is parallel to the second section of the first ground wall line; the second transmission line comprises a seventh segment and an eighth segment vertically extending from the tail end of the seventh segment, forming a vertical corner, and enabling the seventh segment to be parallel to the fifth segment and the eighth segment to be parallel to the sixth segment; the width of the first transmission line is larger than that of the second transmission line through design, so that the signal input end of the asymmetric phase compensation differential transmission line is consistent with the amplitude and the phase of the signal output end, namely the signal input end is the same as the amplitude and the phase of the signal output end or the phase deviation is the minimum, the performance of the asymmetric phase compensation differential transmission line is greatly improved, the design freedom degree of the asymmetric phase compensation differential transmission line is higher due to the design of a vertical corner, and the application range is wider.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic diagram of an asymmetric phase-compensated differential transmission line according to the present invention;
FIG. 2 is a schematic diagram of a circuit structure of an asymmetric phase compensation differential transmission line applied to an eight-way combined power amplifier according to the present invention;
FIG. 3 is a graph of a gain simulation for the circuit configuration of FIG. 2;
fig. 4 is a graph illustrating simulation of the dc-to-rf conversion efficiency of the circuit configuration of fig. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides an asymmetric phase compensation differential transmission line 100, where the asymmetric phase compensation differential transmission line 100 includes: a first ground wall line 1, a second ground wall line 2, and a differential transmission line pair 3.
The first ground wall line 1 and the second ground wall line 2 are parallel to each other and spaced apart from each other, and are used for shielding adjacent signal coupling interference.
The first ground wall line 1 comprises a first section 11 and a second section 12 extending vertically from the rear end of the first section 11, i.e. forming a vertical corner structure.
The second floor 2 includes a third section 21 and a fourth section 22 extending vertically from the end of the third section 21, i.e., forming a vertical corner structure.
The third section 21 is parallel to and spaced from the first section 11, and the fourth section 22 is parallel to and spaced from the second section 12. The head end of the first section 11 is flush with the head end of the third section 21, and the tail end 12 of the second section is flush with the tail end of the fourth section 22.
The differential transmission line pair 3 is arranged between the first ground wall line 1 and the second ground wall line 2 at intervals, and is parallel to the first ground wall line 1 or the second ground wall line 2.
The differential transmission line pair 3 includes a first transmission line 31 and a second transmission line 32 disposed spaced apart from each other.
Specifically, the first transmission line 31 includes a fifth segment 311 parallel to and spaced apart from the first segment 11, and a sixth segment 312 extending vertically from a tail end of the fifth segment 311 and parallel to and spaced apart from the second segment 12, i.e., forming a vertical corner structure.
The second transmission line 32 includes a seventh segment 321 parallel to and spaced apart from the fifth segment 311, and an eighth segment 322 vertically extending from a tail end of the seventh segment 321 and parallel to and spaced apart from the sixth segment 312, i.e., forming a vertical corner structure.
The head end of the first end 11, the head end of the third end 21, the head end of the fifth segment 311 and the head end of the seventh segment 321 are flush with each other and form a signal input end Port 1; the tail end of the second segment 12, the tail end of the fourth segment 22, the tail end of the sixth segment 312, and the tail end of the eighth segment 322 are flush with each other and together form a signal output Port 2;
in the above structural design, the above design of the first ground wall line 1, the second ground wall line 2, the first transmission line 31 and the second transmission line 32 makes the asymmetric phase compensation differential transmission line 100 integrally form a vertical corner structure, and when applied to the design of an actual system, the symmetry and layout area optimization of the system structure can be effectively improved, so that the design freedom is larger, and the application range is wider.
Due to the design of the vertical corner structure, the length of the first transmission line 31 is greater than that of the second transmission line 32, and if the line widths of the first transmission line 31 and the second transmission line 32 are the same, that is, the characteristic impedances are the same, when a pair of differential signals with balanced amplitudes and phases at the signal input end Port1 reach the signal output end Port2 after passing through the right-angle transition structure, the phases of the differential signals are greatly deviated, so that the performance is greatly influenced. Therefore, in the present invention, the characteristic impedances of the first transmission line 31 and the second transmission line 32 are set to be unequal, and the amplitudes and phases of the differential signals transmitted from the signal input Port1 to the signal output Port2 are made to be consistent by compensation, that is, the amplitudes and phases of the differential signals at the signal input Port1 and the signal output Port2 are the same or the phase deviation is minimized, so that the design parameters can be obtained by simulation according to the design concept.
Specifically, in this embodiment, the width w2 of the first transmission line 31 is designed to be greater than the width w4 of the second transmission line 32, so that the characteristic impedance of the first transmission line 31 is reduced, and the phase difference between the first transmission line 31 and the second transmission line 32 caused by the signal input Port1 transmitting to the signal output Port2 during the quarter turn is compensated to a certain extent, so that the phases of the differential signals transmitted from the signal input Port1 to the signal output Port2 are consistent, thereby effectively improving the transmission performance of the asymmetric phase compensation differential transmission line 100.
The width ratio of the first transmission line 31 and the second transmission line 32 is designed to be related to the length difference caused by the turning, and more preferably, the ratio of the width w2 of the first transmission line 31 to the width w4 of the second transmission line 32 is 1.1-1.3. Because of the actual design, for guaranteeing that the domain size is not too big, satisfy the technological design rule requirement again simultaneously, the linewidth is too wide neither too thin nor too thin, and the interval is too big, and is more suitable for the practicality, consequently, in this embodiment, prefer the width w2 of first transmission line 31 with the width w4 ratio of second transmission line 32 is 1.2.
In order to achieve complementary coincidence of the phases and the widths of the differential signals transmitted from the signal input Port1 to the signal output Port2, in the present embodiment, the distance w1 between the first ground wall 1 and the first transmission line 31 is equal to the distance w5 between the second ground wall 2 and the second transmission line 32, that is, w1 is equal to w 5; the length difference between the first transmission line 31 and the second transmission line 32 is equal to twice the sum of the spacing w3 between the first transmission line 31 and the second transmission line 32 and the width w2 of the first transmission line 31, that is, the length difference between the first transmission line 31 and the second transmission line 32 is 2 (w2+ w 3).
The w1, w2, w3, w4 and w5 can be arranged more conveniently and more quickly to realize the design so as to meet the requirement that the amplitude and the phase of the differential signal are consistent when the signal input end Port1 is transmitted to the signal output end Port2, thereby effectively improving the transmission performance of the asymmetric phase compensation differential transmission line 100.
Referring to fig. 2-4, the asymmetric phase compensation differential transmission line 100 of the present invention is applied to an eight-way composite power amplifier PA, as shown in fig. 2, which operates in the E-band (60-90 GHz).
As can be seen from fig. 3, the small signal gain of the eight-way composite PA is greatly increased in the whole E-band, for example, at 74GHz, due to the asymmetric phase compensation differential transmission line 100 of the present invention, the small signal gain of the eight-way composite PA is increased from 18.6dB when the symmetric transmission line in the related art is used to 19.36dB in the present embodiment.
As can be seen from fig. 4, the efficiency (PAE) of converting the dc signal of the eight-way composite PA to the rf signal is greatly improved in the whole range of the input power variation, for example, when the input power is 5dBm, the PAE of the eight-way composite PA is improved from 18.9% when the symmetric transmission line in the related art is used to 20.6% in the present embodiment due to the asymmetric phase compensation differential transmission line 100 of the present invention.
Compared with the prior art, in the asymmetric phase compensation differential transmission line, the first transmission line comprises a fifth section and a sixth section which vertically extends from the tail end of the fifth section to form a vertical corner structure, and the fifth section is parallel to the first section of the first ground wall line, and the sixth section is parallel to the second section of the first ground wall line; the second transmission line comprises a seventh segment and an eighth segment vertically extending from the tail end of the seventh segment, forming a vertical corner, and enabling the seventh segment to be parallel to the fifth segment and the eighth segment to be parallel to the sixth segment; the width of the first transmission line is larger than that of the second transmission line through design, so that the signal input end of the asymmetric phase compensation differential transmission line is consistent with the amplitude and the phase of the signal output end, namely the signal input end is the same as the amplitude and the phase of the signal output end or the phase deviation is the minimum, the performance of the asymmetric phase compensation differential transmission line is greatly improved, the design freedom degree of the asymmetric phase compensation differential transmission line is higher due to the design of a vertical corner, and the application range is wider.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. An asymmetric phase-compensated differential transmission line, comprising:
a first wall liner comprising a first section and a second section extending vertically from a trailing end of the first section;
the second floor comprises a third section and a fourth section, wherein the third section is parallel to the first section and is arranged at intervals, and the fourth section vertically extends from the tail end of the third section and is parallel to the second section and is arranged at intervals; the first ground wall line and the second ground wall line are used for shielding adjacent signal coupling interference; and the number of the first and second groups,
the differential transmission line pair is arranged between the first ground wall line and the second ground wall line at intervals and comprises a first transmission line and a second transmission line which are arranged at intervals; the first transmission line comprises a fifth section and a sixth section, wherein the fifth section is parallel to the first section and is arranged at intervals, and the sixth section vertically extends from the tail end of the fifth section and is parallel to the second section and is arranged at intervals; the second transmission line comprises a seventh segment parallel to and spaced from the fifth segment and an eighth segment vertically extending from a tail end of the seventh segment and parallel to and spaced from the sixth segment;
the head end of the first end, the head end of the third end, the head end of the fifth section and the head end of the seventh section are flush with each other and form a signal input end together; the tail end of the second section, the tail end of the fourth section, the tail end of the sixth section and the tail end of the eighth section are flush with each other and form a signal output end together;
the width of the first transmission line is greater than the width of the second transmission line.
2. The asymmetric phase-compensated differential transmission line of claim 1, wherein the ratio of the width of the first transmission line to the width of the second transmission line is 1.1-1.3.
3. The asymmetric phase-compensated differential transmission line of claim 2, wherein the ratio of the width of the first transmission line to the width of the second transmission line is 1.2.
4. The asymmetric phase-compensated differential transmission line of claim 1, wherein the spacing of the first ground wall line to the first transmission line is equal to the spacing of the second ground wall line to the second transmission line.
5. The asymmetric phase-compensated differential transmission line of claim 1, wherein the difference between the length of the first transmission line and the length of the second transmission line is equal to twice the sum of the spacing between the first transmission line and the second transmission line and the width of the first transmission line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620558.5A CN111786064A (en) | 2020-06-30 | 2020-06-30 | Asymmetric phase compensation differential transmission line |
| PCT/CN2020/120959 WO2022000848A1 (en) | 2020-06-30 | 2020-10-14 | Asymmetric phase compensation differential transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620558.5A CN111786064A (en) | 2020-06-30 | 2020-06-30 | Asymmetric phase compensation differential transmission line |
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| CN111786064A true CN111786064A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010620558.5A Pending CN111786064A (en) | 2020-06-30 | 2020-06-30 | Asymmetric phase compensation differential transmission line |
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| WO (1) | WO2022000848A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108604723A (en) * | 2016-02-01 | 2018-09-28 | 安费诺富加宜（亚洲）私人有限公司 | High-speed data communication system |
| US20190123410A1 (en) * | 2017-10-20 | 2019-04-25 | Integrated Device Technology, Inc. | 90 degree differential signal layout transition |
| KR20200056214A (en) * | 2018-11-14 | 2020-05-22 | 고려대학교 산학협력단 | Asymmetric coupling line capable of reducing the noise of a bent line and method of forming the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI531111B (en) * | 2014-02-14 | 2016-04-21 | Univ Chung Hua | Low crosstalk high frequency transmission differential pair microstrip line |
| CN106295126A (en) * | 2016-07-27 | 2017-01-04 | 中国航空无线电电子研究所 | A kind of method calculating microstrip coupled difference transmission lines far-end noise |
-
2020
- 2020-06-30 CN CN202010620558.5A patent/CN111786064A/en active Pending
- 2020-10-14 WO PCT/CN2020/120959 patent/WO2022000848A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108604723A (en) * | 2016-02-01 | 2018-09-28 | 安费诺富加宜（亚洲）私人有限公司 | High-speed data communication system |
| US20190123410A1 (en) * | 2017-10-20 | 2019-04-25 | Integrated Device Technology, Inc. | 90 degree differential signal layout transition |
| KR20200056214A (en) * | 2018-11-14 | 2020-05-22 | 고려대학교 산학협력단 | Asymmetric coupling line capable of reducing the noise of a bent line and method of forming the same |
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| Publication number | Publication date |
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| WO2022000848A1 (en) | 2022-01-06 |
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Application publication date: 20201016 |