CN113422179A - Branch knot loading type broadband phase shifter of substrate integrated coaxial line - Google Patents
Branch knot loading type broadband phase shifter of substrate integrated coaxial line Download PDFInfo
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- CN113422179A CN113422179A CN202110624990.6A CN202110624990A CN113422179A CN 113422179 A CN113422179 A CN 113422179A CN 202110624990 A CN202110624990 A CN 202110624990A CN 113422179 A CN113422179 A CN 113422179A
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- line
- stub
- phase shifter
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- microstrip
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/184—Strip line phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/183—Coaxial phase-shifters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention discloses a minor matters loading type broadband phase shifter of a substrate integrated coaxial line, which comprises a line engraving layer and a medium base layer arranged at two sides of the line engraving layer, wherein a main line and a reference line are formed on the line engraving layer, two ends of one medium base layer are respectively extended with an extension part protruding out of the line engraving layer, a microstrip input feeder line and a microstrip output feeder line are respectively arranged on the two extension parts, the input end and the output end of the main line are respectively and electrically connected with the microstrip input feeder line and the microstrip output feeder line on one extension part, the input end and the output end of the reference line are respectively and electrically connected with the microstrip input feeder line and the microstrip output feeder line on the other extension part, and the phase shifter is independently designed based on the substrate integrated coaxial line, so that the application prospect and the range of the substrate integrated coaxial line can be expanded, and the phenomenon that a coupling gap is too narrow can be avoided, resulting in a problem that it is difficult to process.
Description
Technical Field
The invention relates to a branch-node loading type broadband phase shifter of a substrate integrated coaxial line, belonging to the technical field of phase shifters.
Background
With the pace of development of communication technology becoming faster and faster, people have made higher demands on miniaturization, broadband, multi-polarization and other aspects of communication systems. The phase shifter is used as a key component for realizing rapid and accurate beam forming and beam control in a phased array or intelligent antenna system, and is widely applied in scenes. Meanwhile, the realization of outputting a constant phase shift value in a wide frequency band range is a key point of research and has practical application significance.
In conventional microwave devices, the phase shifter is most commonly designed based on a microstrip line structure and mainly structurally includes a coupling type and a branch loading type. The most classical phase shifter is the schferman phase shifter, but this type of phase shifter needs a larger coupling coefficient to obtain a wider phase shift bandwidth, which also results in a too narrow coupling gap and is not suitable for practical processing. The branch-node loading type phase shifter can avoid the adverse factor, thereby realizing the output of a constant phase shift value in a broadband range. The microstrip line phase shifter has the characteristics of small volume, easiness in processing, low cost and the like, but has small power capacity, large insertion loss and no shielding structure; therefore, with the increasing demand for miniaturization of devices now and in the future, microstrip line phase shifters may have an influence on each other at the time of integration of other planar circuits. In addition, other types of transmission line phase shifters, such as stripline phase shifters, transmit TEM modes but do not have shielding structures. However, since the substrate integrated waveguide has a shielding structure, but is not propagated in the TEM mode and is a dispersion structure, and has a cut-off wavelength, the volume cannot be too small, and it is not suitable for application in a wide frequency band.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a stub-loaded broadband phase shifter of a substrate integrated coaxial line, so as to solve the technical problem that the phase shifter of the substrate integrated waveguide in the prior art is difficult to apply in a broadband range.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
a branch-node-loaded broadband phase shifter of a substrate-integrated coaxial line comprises a line engraving layer and medium base layers arranged on two sides of the line engraving layer, wherein a main line and a reference line are formed on the line engraving layer, extension parts protruding out of the line engraving layer extend from two ends of one of the medium base layers, microstrip input feeders and microstrip output feeders are arranged on the two extension parts, the input end and the output end of the main line are electrically connected with the microstrip input feeder and the microstrip output feeder on one of the extension parts respectively, and the input end and the output end of the reference line are electrically connected with the microstrip input feeder and the microstrip output feeder on the other extension part respectively.
As a preferred technical solution of the present invention, a plurality of open-circuit branch lines formed on the line scribing layer are connected to one side of the main line facing the reference line, three open-circuit branch lines are provided, and the three open-circuit branch lines are arranged on the line scribing layer at equal intervals.
As a preferred embodiment of the present invention, the length of the open-circuit branch line is one half of the operating wavelength.
As a preferred embodiment of the present invention, the open-circuit branch line includes a first branch line connected to the main line and a second branch line connected to the first branch line, wherein the length of the first branch line is less than a quarter of the operating wavelength, and the length of the second branch line is greater than a quarter of the operating wavelength.
As a preferable aspect of the present invention, the impedance of the first branch line is larger than the impedance of the second branch line.
As a preferred technical solution of the present invention, the microstrip input feed line and the microstrip output feed line have the same structure.
As a preferred technical solution of the present invention, the reference line is bent away from the main line, and the bending angle of the reference line is 90 degrees.
As a preferable technical scheme of the present invention, the dielectric substrate extending with the extension portion is provided with a second metal layer on a side facing away from the line scribing layer, a first metal layer is provided on another side of the dielectric substrate facing away from the line scribing layer, a plurality of shielding holes coaxially arranged are formed in the first metal layer, the dielectric substrate, the line scribing layer and the second metal layer (9), and the plurality of shielding holes are arranged at equal intervals.
As a preferred technical scheme of the invention, the shielding hole is of a cylindrical structure.
Compared with the prior art, the invention has the following beneficial effects:
the phase shifter is independently designed based on the substrate integrated coaxial line, so that the application prospect and the range of the substrate integrated coaxial line can be expanded, the problem that the substrate integrated coaxial line is difficult to process due to too narrow coupling gaps can be solved, in addition, the multilayer design structure can effectively reduce the production cost and the production difficulty, and the practicability is stronger.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a side view of the present invention;
fig. 3 is a schematic structural view of a shielding hole in the present invention.
1-line scribing layer; 2-a media substrate; 3-a main line; 4-reference line; 5-an expansion section; 6-microstrip input feed line; 7-microstrip output feed line; 8-open branch line; 9-a second metal layer; 10-a first metal layer; 11-a shielding hole;
801-first branch line; 802-second branch line.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1 to 3, a stub-loaded wideband phase shifter of a substrate-integrated coaxial line includes a line drawing layer 1 and dielectric base layers 2 disposed at both sides of the line drawing layer 1, a main line 3 and a reference line 4 are formed on the line drawing layer 1, extension portions 5 protruding out of the line drawing layer 1 extend from both ends of one of the dielectric base layers 2, a microstrip input feeder 6 and a microstrip output feeder 7 are disposed on both of the extension portions 5, and the microstrip input feeder 6 and the microstrip output feeder 7 have the same structure.
The main line 3 and the reference line 4 are connected to normally connect with an external device, and the impedance of the microstrip input feed line 6 and the impedance of the microstrip output feed line 7 are preferably 50 ohms.
The input end and the output end of the main line 3 are respectively and electrically connected with a microstrip input feeder 6 and a microstrip output feeder 7 on one of the expansion parts 5, and the input end and the output end of the reference line 4 are respectively and electrically connected with a microstrip input feeder 6 and a microstrip output feeder 7 on the other expansion part 5.
In the actual production process, a layer of epoxy resin for covering the microstrip input feeder 6 and the microstrip output feeder 7 can be coated on the extension part 5, so that the microstrip input feeder 6 and the microstrip output feeder 7 are protected by the epoxy resin, and the problem that the microstrip input feeder 6 and the microstrip output feeder 7 are easy to damage is prevented.
The reference line 4 is bent away from the main line 3, the bending angle of the reference line 4 is 90 degrees, the specific length of the reference line 4 is obtained through theoretical calculation, the bending design of the reference line 4 mainly reduces the volume of the reference line, and in the actual use process, the length of the reference line 4 can be adjusted to enable the phase slope of the insertion phase shift to be equal to the phase slope of the insertion phase shift of the main line 3.
It should be noted that the length of the reference line 4 in the present application can be calculated by calculating the length of the reference line in the existing phase shifter.
The side, facing the reference line 4, of the main line 3 is connected with a plurality of open-circuit branch lines 8 formed on the line engraving layer 1, the number of the open-circuit branch lines 8 is three, the three open-circuit branch lines 8 are arranged on the line engraving layer 1 at equal intervals, and the length of each open-circuit branch line 8 is one half of the working wavelength.
The open-circuit branch line 8 includes a first branch line 801 connected to the main line 3, and a second branch line 802 connected to the first branch line 801, the length of the first branch line 801 is less than a quarter of the operating wavelength, the length of the second branch line 802 is greater than a quarter of the operating wavelength, and the impedance of the first branch line 801 is greater than the impedance of the second branch line 802.
The length of the open stub 8 can be determined according to the actual situation, the length of the first stub 801 is preferably 5.7mm and its impedance is preferably 94 ohms, the length of the second stub 802 is preferably 6.1mm and its impedance is preferably 32 ohms, the total open stub 8 length is practically about one half of the operating wavelength, therefore, when the ratio of the first stub 801 and the second stub 802 of the open stub 8 and the ratio of the impedances are 1.07 and 2.94, respectively, and the distance of the adjacent open stub 8 is one quarter of the operating wavelength, a constant phase shift of a wide frequency band can be achieved at a suitable main wire 3 length.
As shown in fig. 1 and 3, the dielectric substrate 2 with the extended portion 5 extending therefrom is provided with a second metal layer 9 on a side facing away from the circuit scribing layer 1, a first metal layer 10 on a side facing away from the circuit scribing layer 1 of the other dielectric substrate 2, a plurality of shielding holes 11 coaxially arranged are formed in the first metal layer 10, the dielectric substrate 2, the circuit scribing layer 1 and the second metal layer 9, and the plurality of shielding holes 11 are arranged at equal intervals.
The second metal layer 9 is arranged to cover the dielectric substrate 2 and the extension portion 5, the shielding hole 11 is opened around the main line 3 and the reference line 4, and the shielding hole 11 arranged coaxially is a through hole structure penetrating through the whole phase shifter in view of the whole structure, so that energy leaked from a gap of the shielding hole 11 during operation can be effectively reduced.
It should be noted that the substrate integrated coaxial line portion is composed of a line scribing layer 1, a dielectric substrate 2 located on both sides of the line scribing layer 1, a metal layer 10, a microstrip portion removed from the metal layer 9, and a shielding hole 11.
The propagation mode of the substrate integrated coaxial line is similar to that of the coaxial line, the TEM mode is used as a main mode, and TE and TM modes can be propagated at the same time. TE and TM modes, which are higher order modes, have an effect on the results of the present invention, while TE10The mode is used as the first higher order mode of the substrate integrated coaxial line structure, therefore, only the TE is limited10Mode, the result of the present invention is not affected by higher order modes. TE can be changed by adjusting the diameter D of the shielding holes 11, the distance T between two adjacent shielding holes 11 and the distance A between two rows of shielding holes 1110The cutoff frequency of the mode.
The material for making the two medium base layers 2 is preferably FR4-epoxy, and when the height of the two medium base layers 2 is 1.039mm, D =0.8mm, T =2.05mm and A =4.1mm are ensured, because TE10The cutoff frequency of the mode is more than 20GHz, which is far more than the working frequency of the broadband phase shifter, so that the performance of the broadband phase shifter can not be influenced, the energy leaked from the gap of the shielding hole 11 under the size is little, and the shielding hole 11 is of a cylindrical structure, so that workers can conveniently process the broadband phase shifter.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A branch-loaded broadband phase shifter of a substrate integrated coaxial line is characterized by comprising a line engraving layer (1), and a medium base layer (2) arranged at both sides of the line engraving layer (1), a main line (3) and a reference line (4) are formed on the line engraving layer (1), an expansion part (5) protruding out of the line engraving layer (1) extends from both ends of one of the medium base layers (2), a micro-strip input feeder line (6) and a micro-strip output feeder line (7) are arranged on the two expansion parts (5), the input end and the output end of the main line (3) are respectively and electrically connected with a micro-strip input feeder line (6) and a micro-strip output feeder line (7) on one of the expansion parts (5), the input end and the output end of the reference line (4) are respectively and electrically connected with a microstrip input feeder line (6) and a microstrip output feeder line (7) on the other extension part (5).
2. The stub-loaded broadband phase shifter of a substrate-integrated coaxial line according to claim 1, wherein a plurality of open stubs (8) formed on the line scribing layer (1) are connected to a side of the main line (3) facing the reference line (4), the number of the open stubs (8) is three, and the three open stubs (8) are equally spaced on the line scribing layer (1).
3. The stub-loaded broadband phase shifter of a substrate-integrated coaxial line according to claim 2, wherein the length of the open stub line (8) is one half of the operating wavelength.
4. A stub-loaded broadband phase shifter according to claim 3, wherein the open stub (8) comprises a first stub (801) connected to the main line (3) and a second stub (802) connected to the first stub (801), the length of the first stub (801) being less than a quarter of the operating wavelength and the length of the second stub (802) being greater than a quarter of the operating wavelength.
5. The stub-loaded broadband phase shifter of a substrate-integrated coaxial line according to claim 1, wherein the impedance of the first stub (801) is greater than the impedance of the second stub (802).
6. The stub-loaded wideband phase shifter of a substrate-integrated coaxial line according to claim 4, wherein the microstrip input feed line (6) and the microstrip output feed line (7) have the same structure.
7. The stub-loaded broadband phase shifter of the substrate-integrated coaxial line according to claim 1, wherein the reference line (4) is bent away from the main line (3), and the bending angle of the reference line (4) is 90 degrees.
8. The stub-loaded broadband phase shifter of the substrate-integrated coaxial line according to claim 1, wherein the dielectric substrate (2) from which the extension part (5) extends is provided with a second metal layer (9) on a side facing away from the line scribing layer (1), the other dielectric substrate (2) is provided with a first metal layer (10) on a side facing away from the line scribing layer (1), the first metal layer (10), the dielectric substrate (2), the line scribing layer (1) and the second metal layer (9) are provided with a plurality of shielding holes (11) coaxially arranged, and the plurality of shielding holes (11) are arranged at equal intervals.
9. The stub-loaded broadband phase shifter of a substrate-integrated coaxial line according to claim 8, wherein the shielding hole (11) is of a cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624990.6A CN113422179A (en) | 2021-06-04 | 2021-06-04 | Branch knot loading type broadband phase shifter of substrate integrated coaxial line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624990.6A CN113422179A (en) | 2021-06-04 | 2021-06-04 | Branch knot loading type broadband phase shifter of substrate integrated coaxial line |
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| CN113422179A true CN113422179A (en) | 2021-09-21 |
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| CN202110624990.6A Pending CN113422179A (en) | 2021-06-04 | 2021-06-04 | Branch knot loading type broadband phase shifter of substrate integrated coaxial line |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0412627A2 (en) * | 1989-08-09 | 1991-02-13 | Mitsubishi Denki Kabushiki Kaisha | Loaded line phase shifter |
| CN104810576A (en) * | 2015-03-31 | 2015-07-29 | 中国电子科技集团公司第五十五研究所 | Millimeter wave broadband 0-pi phase shifter |
| US20180219531A1 (en) * | 2017-01-30 | 2018-08-02 | United Arab Emirates University | Microstrip circuits exhibiting electromagnetically induced transparency and fano resonance |
| CN112290182A (en) * | 2020-09-08 | 2021-01-29 | 南京邮电大学 | Double-frequency power divider based on substrate integrated coaxial line |
| CN112864549A (en) * | 2021-01-07 | 2021-05-28 | 南京邮电大学 | Novel miniaturized differential phase shifter of multichannel broadband |
-
2021
- 2021-06-04 CN CN202110624990.6A patent/CN113422179A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0412627A2 (en) * | 1989-08-09 | 1991-02-13 | Mitsubishi Denki Kabushiki Kaisha | Loaded line phase shifter |
| CN104810576A (en) * | 2015-03-31 | 2015-07-29 | 中国电子科技集团公司第五十五研究所 | Millimeter wave broadband 0-pi phase shifter |
| US20180219531A1 (en) * | 2017-01-30 | 2018-08-02 | United Arab Emirates University | Microstrip circuits exhibiting electromagnetically induced transparency and fano resonance |
| CN112290182A (en) * | 2020-09-08 | 2021-01-29 | 南京邮电大学 | Double-frequency power divider based on substrate integrated coaxial line |
| CN112864549A (en) * | 2021-01-07 | 2021-05-28 | 南京邮电大学 | Novel miniaturized differential phase shifter of multichannel broadband |
Non-Patent Citations (2)
| Title |
|---|
| ANINDYA GHOSH等: "Design of Stepped Impedance Stub Loaded Wide-Band 90-Degree Phase Shifter", 《2020 INTERNATIONAL SYMPOSIUM ON ANTENNAS & PROPAGATION》 * |
| XI YU等: "Design of Ultraflat Phase Shifters Using Multiple Quarter-Wavelength Short-Ended Stubs", 《IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS》 * |
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Application publication date: 20210921 |