CN108987877B - Miniaturized microstrip line structure branch loading dispersion delay line - Google Patents
Miniaturized microstrip line structure branch loading dispersion delay line Download PDFInfo
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- CN108987877B CN108987877B CN201810830954.3A CN201810830954A CN108987877B CN 108987877 B CN108987877 B CN 108987877B CN 201810830954 A CN201810830954 A CN 201810830954A CN 108987877 B CN108987877 B CN 108987877B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P9/00—Delay lines of the waveguide type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a miniaturized microstrip line structure branch loading dispersion delay line, which comprises a conductor grounding plate on one side of a medium substrate, a main transmission microstrip line on the other side of the medium substrate and a branch loading stub line positioned on the same side of the microstrip line. The ground plate is provided with a number of slot lines consistent with the loading stubs, and the positions of the slot lines correspond to the positions of the stubs. The miniaturization of the dispersion delay line is realized by bending the slot line on the grounding plate and positioning the stub line at one side of the main transmission microstrip line. By loading the same size stubs, the implementation delay time increases linearly with the number of loaded stubs. The invention has small size, simple structure, good performance and better delay characteristic in a specific frequency range.
Description
Technical Field
The invention relates to the field of delay line design, in particular to a miniaturized microstrip line structure branch loading dispersion delay line.
Background
A delay line is an element or device for delaying an electrical signal for a period of time. The delay line should have a flat amplitude-frequency characteristic and a certain phase shift characteristic (or delay frequency characteristic) in the passband, and should have a proper matching impedance, the attenuation is small. Group delay engineering is widely used in phased array elements, analog signal processing, and group delay equalization. Common delay lines are magnetostatic wave (MSW) and Surface Acoustic Wave (SAW) dispersive delay lines.
A magnetostatic wave (MSW) dispersive delay line can be controlled via layer, stripline and boundary structure parameters using a dispersion film inherent in a quasi-static mode of ferromagnetism. Due to the quasi-static nature of the magnetostatic mode, the MSW wavelength is much smaller than in the electromagnetic mode, which makes the device very compact. However, MSW delay lines are mainly used in the last 80 th century and are now rarely used because of the need for bias magnetic fields.
A Surface Acoustic Wave (SAW) dispersive delay line, whose dispersion characteristics are determined by electrodes distributed on a dielectric substrate, has a longer delay time than that of a MSW dispersive delay line, and has a smaller acoustic wavelength than that in an electromagnetic mode. SAW devices are used in a large number in the microwave industry, but due to material limitations, the frequencies are mostly below the X-band, and are not suitable for millimeter wave and terahertz frequencies.
Therefore, the dispersion delay line has small development size, simple structure and excellent performance, and can meet different frequency points and different group delays according to actual requirements, thereby having great significance.
Disclosure of Invention
Therefore, the invention aims to provide a miniaturized microstrip line structure branch loading dispersion delay line which has the advantages of small size, simple structure, good performance and delay characteristic at a specific frequency point.
The invention is realized by adopting the following scheme: the miniaturized microstrip line structure branch loading dispersion delay line comprises a medium substrate, a conductor grounding plate on one side of the medium substrate, a main transmission microstrip line on the other side of the medium substrate, and a single branch or multi-branch stub line which is also positioned on the other side of the medium substrate and is positioned on the same side of the main transmission microstrip line; the conductor grounding plate comprises a number of slot lines consistent with the number of the short sections.
The invention loads the stub line on one side of the main transmission microstrip line only, thereby realizing the phase delay of the main transmission microstrip line. Is beneficial to the miniaturization of the structure. Meanwhile, the invention loads the slot line on the other side of the medium corresponding to the main transmission microstrip line to realize all-pass transmission of signals, namely S12 is close to 0dB. In addition, the invention adopts the design of the bent groove line, which is beneficial to the miniaturization of the structure. By adopting the delay line, the number of loaded branches at one side of the main transmission microstrip line is increased at any time, and the delay time of the dispersion delay line is linearly increased.
Further, each groove line is divided into two parts, wherein one part is a straight line, and the other part is a bending line; the linear parts of the slot lines respectively correspond to the positions of the stub lines and are positioned on the same side of the main transmission microstrip line; wherein the bending line part of each slot line is positioned at the other side of the main transmission microstrip line. The bend line slot line is equal to the straight slot line in length, but the bending of the slot line reduces the area of the plane of the dispersive delay line.
Further, when the stub is a multi-branch stub, each stub has equal width and equal length.
Further, when the number of the stubs is two, the distance between the two stubs is 10mm.
Further, when the number of the stubs is three, the distance between two adjacent stubs is 5mm.
Further, the length of the stub is one quarter of a waveguide wavelength.
Further, the width of the slot line is 1/3-1/4 of the width of the stub, and the length is 3-6mm longer than the stub.
Further, the width of the main transmission microstrip line is 1.9mm, and the main transmission microstrip line is a 50Ω impedance matching line.
Further, the main transmission microstrip line and the stub line are printed wires of the dielectric substrate signal layer; the slot line is a region where conductors are removed from the conductor ground plane of the dielectric substrate.
Further, the group delay of the miniaturized microstrip line structure branch loading dispersion delay line meets the linear superposition characteristic, namely, the following conditions: t=nt, where T is the group delay time when the number of stubs is n, T is the group delay time when the number of stubs is 1, and n represents the number of loaded stubs. I.e. when the stub is 1, the group delay time is t; when the number of the stubs is two, the group delay time is 2t; when the stub is three, the group delay time is linearly superimposed to be 3t, and so on.
Preferably, the delay line of the present invention has dimensions of 30.5mm by 20mm by 0.8mm.
Compared with the prior art, the invention has the following beneficial effects: the invention realizes miniaturization of the dispersion delay line by bending the slot line on the grounding plate and positioning the stub line at one side of the main transmission microstrip line. And meanwhile, by loading the stubs with the same size, the delay time linearly increases along with the number of the loaded stubs. The invention has small size, simple structure, good performance, better delay characteristic in a specific frequency range, suitability for the high-frequency field and wide application prospect.
Drawings
Fig. 1 is a schematic diagram of a basic unit of a stub of a signal layer on the top of a delay line according to an embodiment of the present invention (2 stubs).
Fig. 2 is a schematic diagram of a basic unit cell of a complementary slot line of a bottom ground layer of a delay line (2 stubs) according to an embodiment of the invention.
Fig. 3 is a graph showing return loss when the number of stubs is 2 in the embodiment of the present invention.
Fig. 4 is a graph showing group delay time when the number of stubs is 2 according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a stub basic unit of a signal layer stub on top of a stub dispersion delay line in an embodiment of the present invention.
Fig. 6 is a schematic diagram of a basic unit of a complementary slot line of a ground plane at the bottom of a stub dispersion delay line in an embodiment of the present invention.
Fig. 7 is a graph of the return loss of a stub dispersion delay line in an embodiment of the present invention.
FIG. 8 is a graph of group delay time for a stub dispersion delay line in accordance with an embodiment of the present invention.
Fig. 9 is a schematic diagram of a stub basic unit of a top signal layer of a three stub dispersion delay line in an embodiment of the present invention.
Fig. 10 is a schematic diagram of a complementary slot line basic cell of a ground plane at the bottom of a three stub dispersion delay line in an embodiment of the present invention.
FIG. 11 is a graph showing group delay time curves of one, two, and three stub dispersion delay lines according to an embodiment of the present invention.
In the figure, 1 is a main transmission microstrip line, 2 and 3 are both stub lines, 4 is a bending slot line, and 5 is a straight slot line.
Description of the embodiments
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 and fig. 2, the present embodiment provides a miniaturized microstrip line structure branch loading dispersion delay line, which includes a dielectric substrate, a conductor ground plate on one side of the dielectric substrate, a main transmission microstrip line on the other side of the dielectric substrate, and a single branch or multi-branch stub line also on the other side of the dielectric substrate and on the same side as the main transmission microstrip line; the conductor grounding plate comprises a number of slot lines consistent with the number of the short sections.
In the embodiment, the stub is loaded on one side of the main transmission microstrip line only, so that the phase delay of the main transmission microstrip line is realized. Is beneficial to the miniaturization of the structure. Meanwhile, the invention loads the slot line on the other side of the medium corresponding to the main transmission microstrip line to realize all-pass transmission of signals, namely S12 is close to 0dB. In addition, the invention adopts the design of the bent groove line, which is beneficial to the miniaturization of the structure. By adopting the delay line, the number of loaded branches at one side of the main transmission microstrip line is increased at any time, and the delay time of the dispersion delay line is linearly increased.
Further, each groove line is divided into two parts, wherein one part is a straight line, and the other part is a bending line; the linear parts of the slot lines respectively correspond to the positions of the stub lines and are positioned on the same side of the main transmission microstrip line; wherein the bending line part of each slot line is positioned at the other side of the main transmission microstrip line. The bend line slot line is equal to the straight slot line in length, but the bending of the slot line reduces the area of the plane of the dispersive delay line.
As shown in fig. 5 and 6, in the present embodiment, when the stub is one, the stub is disposed on the side where the main transmission path is located, the complementary slot line is disposed on the ground plane layer, the main transmission path and the open stub are printed wires of a signal layer of a printed circuit board (dielectric substrate), and the complementary slot line is a slot line area where the conductor is removed at the ground plane. The groove lines at the positions corresponding to the stubs are straight lines, and the other half of the groove lines are bending lines. The traditional dispersion delay line stub is located on two sides of the main transmission microstrip line, the stub is arranged on one side of the main transmission microstrip line, the slot line corresponding to the stub is arranged to be a straight line, the other half of the slot line is arranged to be a bending line so as to achieve the purpose of reducing the size, and the simulation result shows that the performance of the bending line is better than that of the straight line. The stub length is the corresponding 1/4 waveguide wavelength of 2.5 GHz. Fig. 7 shows a graph of return loss for a stub time dispersive delay line. Fig. 8 is a graph of group delay for a dispersive delay line with a group delay time of 0.65ns.
In this embodiment, when the number of the stubs is plural, the plural stubs have equal widths and equal lengths.
As shown in fig. 1 and 2, in the present embodiment, when the number of the stubs is two, the distance between the two stubs is 10mm. The dispersion delay line stubs 2 and 3 are of a pair of equal-length and equal-width structures and are arranged on one side of the signal layer of the main transmission path 1; and the pair of complementary slot lines are arranged at two sides of the ground plane of the microstrip line structure of the main transmission path. The groove line at the position corresponding to the stub is a straight line 5, and the other half of the groove lines are bending lines 4. In the delay line structure, a pair of equal-length and equal-width stubs are arranged on a layer where the main transmission path is located, and a pair of complementary slot lines are arranged on a ground plane layer. The dispersive delay line of the two stubs is obtained by adding one stub and one slot line on the basis of one stub delay line, and when the distance between the two stubs is regulated to be 10mm, the return loss curve performance is best as shown in fig. 3, and the group delay time is linearly overlapped relative to the group delay time in fig. 8 as shown in fig. 4.
As shown in fig. 9 and 10, in the present embodiment, when the number of the stubs is three, the distance between two adjacent stubs is 5mm. In the embodiment, the three stub lines are all arranged on the same side of the main transmission microstrip line, the slot lines corresponding to the stub lines are arranged as straight lines, the other half of the slot lines are bending lines, and the optimal distance between the three stub lines is optimized to be 5mm. As shown in fig. 11, the simulation results show that the number of stubs of the dispersive delay line of one, two or three stubs is in a linear superposition relationship with the group delay time.
In this embodiment, the length of the stub is one quarter of the waveguide wavelength.
In this embodiment, the width of the slot line is 1/3-1/4 of the width of the stub, and the length is 3-6mm longer than the stub.
In this embodiment, the width of the main transmission microstrip line is 1.9mm, which is a 50Ω impedance matching line.
In this embodiment, the main transmission microstrip line and the stub are printed wires of the dielectric substrate signal layer; the slot line is a region where conductors are removed from the conductor ground plane of the dielectric substrate.
In this embodiment, the group delay of the miniaturized microstrip line structure branch loading dispersion delay line satisfies the linear superposition characteristic, namely, satisfies: t=nt, where T is the group delay time when the number of stubs is n, T is the group delay time when the number of stubs is 1, and n represents the number of loaded stubs. I.e. when the stub is 1, the group delay time is t; when the number of the stubs is two, the group delay time is 2t; when the stub is three, the group delay time is linearly superimposed to be 3t, and so on.
Preferably, the size of the dispersive delay line of this embodiment is 30.5mm×20mm×0.8mm, which is small compared to the prior art. The specific dimensions are as follows: the main transmission microstrip line 1 is 1.9mm wide, the stubs 2, 3 are 19mm long, 1.32mm wide, and the slot lines 4, 5 are 0.25mm wide. The dielectric substrate (printed circuit board) is Roger-4350.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides a miniaturized microstrip line structure branch knot loading dispersion delay line, includes medium substrate, its characterized in that: the device also comprises a conductor grounding plate on one side of the medium substrate, a main transmission microstrip line on the other side of the medium substrate and a single-branch or multi-branch stub line which is also positioned on the other side of the medium substrate and positioned on the same side of the main transmission microstrip line; the conductor grounding plate comprises slot lines with the same quantity as the stub lines;
the groove line is divided into two parts, one part is a straight line, and the other part is a bending line; the straight line parts of the slot lines respectively correspond to the positions of the short sections and are positioned on the same side of the main transmission microstrip line; the bending line part of the slot line is positioned at the other side of the main transmission microstrip line;
the length of the stub is one quarter of the waveguide wavelength;
the width of the groove line is 1/3-1/4 of the width of the stub, and the length of the groove line is 3-6mm longer than the length of the stub.
2. A miniaturized microstrip line structure stub loading dispersion delay line according to claim 1, wherein: when the number of the stubs is two, the distance between the two stubs is 10mm.
3. A miniaturized microstrip line structure stub loading dispersion delay line according to claim 1, wherein: when the number of the stubs is three, the distance between two adjacent stubs is 5mm.
4. A miniaturized microstrip line structure stub loading dispersion delay line according to claim 1, wherein: the width of the main transmission microstrip line is 1.9mm, and the main transmission microstrip line is a 50Ω impedance matching line.
5. A miniaturized microstrip line structure stub loading dispersion delay line according to any one of claims 1 to 4, wherein: the main transmission microstrip line and the stub line are printed wires of the dielectric substrate signal layer; the slot line is a region where conductors are removed from the conductor ground plane of the dielectric substrate.
6. A miniaturized microstrip line structure stub loading dispersion delay line according to any one of claims 1 to 4, wherein: the group delay of the miniaturized microstrip line structure branch loading dispersion delay line meets the linear superposition characteristics, namely, the group delay meets the following conditions: t=nt, where T is the group delay time when the number of stubs is n, T is the group delay time when the number of stubs is 1, and n represents the number of loaded stubs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810830954.3A CN108987877B (en) | 2018-07-26 | 2018-07-26 | Miniaturized microstrip line structure branch loading dispersion delay line |
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| CN201810830954.3A CN108987877B (en) | 2018-07-26 | 2018-07-26 | Miniaturized microstrip line structure branch loading dispersion delay line |
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| CN108987877B true CN108987877B (en) | 2023-07-04 |
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| CN114567280A (en) * | 2021-12-23 | 2022-05-31 | 中国电子科技集团公司第二十九研究所 | High-performance miniaturized LTCC delayer |
| CN115084806B (en) * | 2022-07-20 | 2023-08-22 | 国网江苏省电力有限公司镇江供电分公司 | Broadband filtering phase shifter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5895775A (en) * | 1996-04-19 | 1999-04-20 | Trw Inc. | Microwave grating for dispersive delay lines having non-resonant stubs spaced along a transmission line |
| CN104779431A (en) * | 2014-01-15 | 2015-07-15 | 徐敬文 | Dispersive microwave group delay line |
| CN208478540U (en) * | 2018-07-26 | 2019-02-05 | 福州大学 | A kind of Mini Microstrip cable architecture racemosus section load dispersive delay line structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9419324B2 (en) * | 2014-01-15 | 2016-08-16 | Ching-Wen Hsue | Delay line having plural open stubs and complementary slots arranged to have parallel portions and non-parallel portions |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5895775A (en) * | 1996-04-19 | 1999-04-20 | Trw Inc. | Microwave grating for dispersive delay lines having non-resonant stubs spaced along a transmission line |
| CN104779431A (en) * | 2014-01-15 | 2015-07-15 | 徐敬文 | Dispersive microwave group delay line |
| CN208478540U (en) * | 2018-07-26 | 2019-02-05 | 福州大学 | A kind of Mini Microstrip cable architecture racemosus section load dispersive delay line structure |
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