CN114335933A - Bendable phase shifter of phased array satellite and control method - Google Patents
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Abstract
The invention discloses a bendable phase shifter of a phased array satellite and a control method, wherein a system comprises a flexible medium substrate, a bendable phase shifting film structure and an electric regulator; the bendable phase-shifting film structure is arranged on the flexible medium substrate in a magnetron sputtering mode and used for adjusting the phase of an electric signal; the electric regulator is electrically connected with the bendable phase-shifting film structure and is used for outputting direct current to the bendable phase-shifting film structure; wherein, the bendable phase shift structure is an artificial surface plasmon bendable phase shift film structure; the method comprises the steps of manufacturing an artificial surface plasmon bendable phase shifting structure on a flexible medium substrate; loading direct current to the artificial surface plasmon bendable phase shifting structure; reconstructing the phase of the phase shifter; by adopting the artificial surface plasmon polariton as the signal path design, the invention strengthens the beam control in phased array satellite communication, reduces the turning loss in a flexible path and realizes the practicability of phase shift design.
Description
Technical Field
The invention relates to the technical field of satellite phased array communication, in particular to a bendable phase shifter of a phased array satellite and a control method.
Background
Surface Plasmons (SPs) are an electromagnetic surface wave formed by coherent oscillation of free electrons at the interface of a metal medium. SPs can realize light transmission and control in a sub-wavelength range and can generate a remarkably enhanced local optical electric field in some special metal micro-nano structures, so that the SPs have important application in a plurality of fields such as biosensors, surface Raman scattering enhancement, photon circuits and the like.
In 2004, in order to simulate the Surface plasmons of an optical band in microwave and millimeter wave bands, an artificial periodic dielectric hole array structure is designed on a metal Surface, so that the plasma frequency of the artificial metal Surface is effectively reduced, and thus the artificial Surface plasmons (also called as Spoof SPP, Designer SPP, and SSPPs) in the microwave and millimeter wave bands are constructed. The advantages of artificial surface plasmons are mainly: first, there is less loss due to the structured surface plasmon frequency being much lower than the plasmon frequency of the metal itself; secondly, the dispersion characteristic of the artificial surface plasmon can be flexibly controlled by changing the structural parameters of the metal surface, and further, an adjustable, reconfigurable and intelligent circuit, device or antenna is obtained.
By utilizing the advantages, devices based on artificial surface plasmon characteristics covering microwave frequency bands and terahertz frequency bands appear on the market, and the devices comprise artificial surface plasmon filters, artificial surface plasmon antennas, artificial surface plasmon power dividers and the like. And some devices which realize the band-pass filtering function by utilizing the low-pass characteristic of the artificial surface plasmon and the high-pass characteristic of the substrate integrated waveguide are arranged, and compared with the prior substrate integrated waveguide band-pass filter, the high-frequency and low-frequency cut-off frequencies of band-pass response can be independently adjusted, so that the design process of the ultra-wideband filter is simplified.
Although the turning loss of the artificial surface plasmon is lower than that of the traditional microstrip transmission line, the transmission loss is higher than that of the traditional microstrip transmission line when the artificial surface plasmon does not turn. The phase shifter based on the artificial surface plasmon is designed to have the advantages that the structure cannot be bent, the loss is high, most of the phase shifters are not adjustable, and the practicability is low. The phase shifter based on the artificial surface plasmon is designed to be a periodic slow wave structure, and the heat dissipation problem can be caused under the condition of high power due to the accumulation of energy in a short length.
Disclosure of Invention
The existing phase shifter structure based on the artificial surface plasmon can not be bent, the transmission loss is higher than that of the traditional microstrip transmission, and the phase shifter structure is a periodic slow wave structure, and the heat dissipation problem can be caused by the energy accumulated in a short length under the high-power condition.
Aiming at the problems, the design that the artificial surface plasmon is adopted as the signal path is adopted, the wave beam control in the phased array satellite communication is enhanced, the turning loss in the flexible path is reduced, the graphene film is plated on the flexible medium through magnetron sputtering, and when the phase shifter is not bent, lower transmission loss can be realized. Meanwhile, the electric reconfigurable characteristic of the graphene is utilized, so that the phase shifter structure based on the artificial surface plasmon can realize the electric adjustable property of the phase, and the phase shift design based on the artificial surface plasmon is practical. In addition, the graphene has higher heat dissipation efficiency than the traditional metal, so that the artificial surface plasmon phase shifter can be better deployed in a high-temperature and high-power environment.
A phased array satellite bendable phase shifter, comprising:
a flexible dielectric substrate;
the phase-shifting film structure can be bent;
an electrical regulator;
the bendable phase-shifting film structure is arranged on the flexible medium substrate in a magnetron sputtering mode and used for adjusting the phase of an electric signal;
the electric regulator is electrically connected with the bendable phase-shifting thin film structure and is used for outputting direct current to the bendable phase-shifting thin film structure;
the bendable phase shifting structure is an artificial surface plasmon bendable phase shifting film structure.
In a first possible implementation manner, the bendable phase shifting thin film structure is a zigzag transmission line thin film structure.
With reference to the second possible implementation manner of the present invention, in a third possible implementation manner, the serrated transmission line thin film structure includes a plurality of periodic units with the same structure, and the serrated transmission line thin film structure is formed by sequentially connecting the periodic units.
With reference to the third possible implementation manner of the present invention, in a fourth possible implementation manner, the bendable phase-shifting film structure is a unidirectional zigzag transmission line film structure, the periodic units are inverted T-shaped structures and include extending portions and base portions, and the periodic units are connected to each other through the base portions to form the unidirectional zigzag transmission line film structure.
In combination with the fourth possible embodiment and the fifth possible embodiment of the present invention, in a fifth possible embodiment, the bendable phase shift film structure base material is graphene.
In a sixth possible implementation manner, with reference to the fifth possible implementation manner of the present invention, the thickness of the bendable phase shifting film structure is 2 times the skin depth corresponding to the lowest operating frequency in the pass band.
With reference to the sixth possible implementation manner of the present invention, in a seventh possible implementation manner, the bendable phase-shifting film structure includes a first connection port and a second connection port, where the first connection port and the second connection port are respectively disposed at two ends, and the electrical regulator respectively inputs and outputs a dc bias voltage through the first connection port and the second connection port.
In a second aspect, a method for controlling a bendable phase shifter of a phased array satellite includes:
manufacturing an artificial surface plasmon bendable phase shifting structure on a flexible medium substrate;
loading direct current to the artificial surface plasmon bendable phase-shifting structure;
changing the effective length of the waveguide structure of the bendable phase shifting structure of the artificial surface plasmon to reconstruct the phase of the phase shifter;
the base material of the bendable phase-shifting structure of the artificial surface plasmon is graphene.
In a first possible implementation manner, the method for controlling a bendable phase shifter of a phased array satellite according to the present invention includes: the method for manufacturing the bendable phase shifting structure of the artificial surface plasmon on the flexible medium substrate comprises the following substeps:
coating the base material of the artificial surface plasmon bendable phase-shifting structure on the flexible medium substrate in a magnetron sputtering mode;
the bendable phase shifting structure of the artificial surface plasmons is designed into a one-way sawtooth structure.
According to the control method of the bendable phase shifter of the phased array satellite, the artificial surface plasmon is adopted as a signal path design, beam control in phased array satellite communication is enhanced, turning loss in a flexible path is reduced, the graphene film is plated on the flexible medium through magnetron sputtering, and lower transmission loss can be achieved when the phase shifter is not bent. Meanwhile, the electric reconfigurable characteristic of the graphene is utilized, so that the phase shifter structure based on the artificial surface plasmon can realize the electric adjustable property of the phase, and the phase shift design based on the artificial surface plasmon is practical. In addition, the graphene has higher heat dissipation efficiency than the traditional metal, so that the artificial surface plasmon phase shifter can be better deployed in a high-temperature and high-power environment.
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 will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a bendable phase shifter for a phased array satellite according to the invention;
FIG. 2 is a schematic diagram of a periodic element in a bendable phase shifter for a phased array satellite according to the present invention;
FIG. 3 is a schematic diagram illustrating a first exemplary embodiment of a method for controlling a bendable phase shifter of a phased array satellite according to the present invention;
FIG. 4 is a diagram illustrating a second exemplary method for controlling a bendable phase shifter of a phased array satellite according to the present invention;
the part names indicated by the numbers in the drawings are as follows: 100-flexible medium substrate, 200-bendable phase shift film structure, 210-periodic unit, 211-extension part, 212-base part, 300-graphene, 400-electric regulator.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The following is a description and explanation of several terms involved in the present application:
artificial surface plasmon: is an electromagnetic oscillation formed by the interaction of free electrons and photons at the surface region of the metal. The interaction between surface charge oscillations and the optical and electromagnetic fields gives surface plasmons many unique interesting properties.
When light waves (electromagnetic waves) are incident on a metal and dielectric interface, free electrons on the metal surface generate collective oscillation, the electromagnetic waves and the free electrons on the metal surface are coupled to form near-field electromagnetic waves which propagate along the metal surface, resonance is generated if the oscillation frequency of the electrons is consistent with the frequency of the incident light waves, and the energy of the electromagnetic fields is effectively converted into collective vibration energy of the free electrons on the metal surface in a resonance state, so that a special electromagnetic mode is formed: the electromagnetic field is confined to a small range of the metal surface and enhanced, and this phenomenon is called a surface plasmon phenomenon.
Skin depth: the skin effect increases the effective resistance of the conductor. The higher the frequency (f), the more pronounced the skin effect. When a current of a high frequency passes through the wire, it is considered that the current flows only in a thin layer on the surface of the wire, which is equivalent to the reduction of the cross section of the wire and the increase of the resistance. Since the central portion of the wire has little current flow, this central portion can be removed to save material. Therefore, a hollow wire may be used instead of a solid wire in the high-frequency circuit. The thickness of this wire is called the skin depth.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The existing phase shifter structure based on the artificial surface plasmon can not be bent, the transmission loss is higher than that of the traditional microstrip transmission, and the phase shifter structure is a periodic slow wave structure, and the heat dissipation problem can be caused by the energy accumulated in a short length under the high-power condition.
In order to solve the problems, a bendable phase shifter and a control method for a phased array satellite are provided.
Fig. 1 shows a bendable phase shifter for a phased array satellite according to an embodiment of the present invention, which includes a flexible dielectric substrate 100, a bendable phase shifting film structure 200, and an electrical regulator 400; the bendable phase-shifting film structure 200 is arranged on the flexible medium substrate 100 in a magnetron sputtering mode and used for adjusting the phase of an electric signal; the electric regulator 400 is electrically connected with the bendable phase-shifting thin film structure 200 and is used for outputting direct current to the bendable phase-shifting thin film structure 200; wherein, the bendable phase shift structure is an artificial surface plasmon bendable phase shift thin film structure 200.
The bendable phase shifting structure is designed into an artificial surface plasmon, wave beam control in phased array satellite communication is enhanced, turning loss in a flexible path is reduced, the graphene 300 film is plated on a flexible medium through magnetron sputtering, and lower transmission loss can be realized when the phase shifter is not bent. The phase of the phase shifter is reconstructed by loading direct current on the bendable phase shifting structure and changing the effective length of the waveguide structure of the bendable phase shifting structure, so that the phase control of the phased array satellite communication line is realized.
In a preferred embodiment of the bendable phase-shifting thin film structure 200, the bendable phase-shifting thin film structure 200 is a zigzag transmission line thin film junction.
Further, as shown in fig. 2, fig. 2 is a schematic diagram of a periodic unit 210 in a bendable phase shifter for a phased array satellite according to the present invention, in which a saw-tooth transmission line thin film structure includes a plurality of periodic units 210 having the same structure, and the saw-tooth transmission line thin film structure is formed by sequentially connecting the periodic units 210.
In another preferred embodiment of the bendable phase-shifting thin film structure 200, the bendable phase-shifting thin film structure 200 is a unidirectional zigzag transmission line thin film structure, the periodic units 210 are inverted T-shaped structures and include extending portions 211 and base portions 212, and the periodic units 210 are connected to each other through the base portions 212 to form the unidirectional zigzag transmission line thin film structure.
By designing the bendable phase-shifting film structure 200 as a one-way zigzag transmission line film structure, beam control in phased array satellite communication is enhanced, and turn loss in a flexible path is reduced.
In a preferred embodiment of the base material, the bendable phase shift film structure 200 is formed by graphene 300. By utilizing the electrical reconfigurable characteristic of the graphene 300, the phase shifter structure based on the artificial surface plasmon can realize the electrical adjustable property of the phase, and the phase shift design based on the artificial surface plasmon is practical. In addition, the graphene 300 has higher heat dissipation efficiency than conventional metals, and thus can be better designed to deploy the artificial surface plasmon phase shifter in a high-temperature and high-power environment.
The thickness of the bendable phase-shifting thin film structure 200 is 2 times of the skin depth corresponding to the lowest working frequency in the pass band.
The bendable phase-shifting thin film structure 200 includes a first connection port and a second connection port, the first connection port and the second connection port are respectively disposed at two ends, and the electric regulator 400 respectively inputs and outputs a dc bias voltage through the first connection port and the second connection port.
The phase control principle is as follows: the radio frequency signal is delayed by any transmission line, so that the phase of the signal can be controlled by using the delay. However, since the bendable phase-shifting thin film structure 200 of the artificial surface plasmon in the present application is a periodic slow-wave structure, the effective electrical length is shorter than that of the conventional transmission line (such as microstrip, coplanar waveguide, etc.), and compared with the conventional delay line phase shifter, the physical length is shorter, so that compared with the conventional transmission line, the bendable phase-shifting thin film structure 200 of the artificial surface plasmon can realize larger phase shift at a shorter physical length. In order to realize the phase reconfigurable characteristic, the invention directly loads direct current to the artificial surface plasmon bendable phase-shifting thin film structure 200 through the electric regulator 400, realizes the regulation and control of the electric characteristic, changes the effective length of the waveguide structure of the artificial surface plasmon bendable phase-shifting thin film structure 200, and further realizes the regulation and control of the electric reconfigurable characteristic of the phase shifter. And the direct current loading of the electric call is completed by the loading of the first connecting port and the second connecting port of the feed port.
The phase of the phase shifter is reconstructed by loading direct current to the bendable phase shifting structure of the artificial surface plasmon and changing the effective length of the waveguide structure of the bendable phase shifting structure of the artificial surface plasmon, so that the phase control of the phased array micro communication line is realized.
In a second aspect, a method for controlling a bendable phase shifter of a phased array satellite, as shown in fig. 3, where fig. 3 is a schematic diagram of a first embodiment of a method for controlling a bendable phase shifter of a phased array satellite according to the present invention, including the steps of:
step 100: manufacturing an artificial surface plasmon bendable phase shifting structure on the flexible medium substrate 100; step 200: loading direct current to the artificial surface plasmon bendable phase shifting structure; step 300: changing the effective length of the waveguide structure of the bendable phase shifting structure of the artificial surface plasmon to reconstruct the phase of the phase shifter; the base material of the bendable phase-shifting structure of the artificial surface plasmon is graphene 300.
The bendable phase shifting structure is designed into an artificial surface plasmon, wave beam control in phased array satellite communication is enhanced, turning loss in a flexible path is reduced, the graphene 300 film is plated on a flexible medium through magnetron sputtering, and lower transmission loss can be realized when the phase shifter is not bent. The phase of the phase shifter is reconstructed by loading direct current on the bendable phase shifting structure and changing the effective length of the waveguide structure of the bendable phase shifting structure, so that the phase control of the phased array satellite communication line is realized.
The phase control principle is as follows: the invention directly loads direct current to the bendable phase-shifting thin film structure 200 of the artificial surface plasmon through the electric regulator 400, realizes the regulation and control of the electric characteristics of the bendable phase-shifting thin film structure 200 of the artificial surface plasmon, and changes the effective length of the waveguide structure of the bendable phase-shifting thin film structure 200 of the artificial surface plasmon, thereby realizing the regulation and control of the electric reconfigurable characteristics of the phase shifter. The phase of the phase shifter is reconstructed by loading direct current to the bendable phase shifting structure of the artificial surface plasmon and changing the effective length of the waveguide structure of the bendable phase shifting structure of the artificial surface plasmon, so that the phase control of the phased array micro communication line is realized.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a second embodiment of a method for controlling a bendable phase shifter of a phased array satellite according to the present invention, and the step 100 preferably includes the sub-steps of:
step 110: coating a film on the base material of the bendable phase-shifting structure of the artificial surface plasmon on the flexible medium substrate 100 in a magnetron sputtering mode; step 120: the bendable phase-shifting structure of the artificial surface plasmon is designed into a one-way sawtooth structure.
The bendable phase shifting structure is designed into an artificial surface plasmon, so that wave beam control in phased array satellite communication is enhanced, and turning loss in a flexible path is reduced.
According to the control method of the bendable phase shifter of the phased array satellite, the artificial surface plasmons are used as the signal path design, wave beam control in phased array satellite communication is enhanced, turning loss in a flexible path is reduced, the graphene 300 film is plated on the flexible medium through magnetron sputtering, and lower transmission loss can be achieved when the phase shifter is not bent. Meanwhile, the electric reconfigurable characteristic of the graphene 300 is utilized, so that the phase shifter structure based on the artificial surface plasmon can realize the electric adjustable property of the phase, and the phase shift design based on the artificial surface plasmon is practical. In addition, the graphene 300 has higher heat dissipation efficiency than conventional metals, and thus can be better designed to deploy the artificial surface plasmon phase shifter in a high-temperature and high-power environment.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A phased array satellite bendable phase shifter, comprising:
a flexible dielectric substrate;
the phase-shifting film structure can be bent;
an electrical regulator;
the bendable phase-shifting film structure is arranged on the flexible medium substrate in a magnetron sputtering mode and used for adjusting the phase of an electric signal;
the electric regulator is electrically connected with the bendable phase-shifting thin film structure and is used for outputting direct current to the bendable phase-shifting thin film structure;
wherein, the bendable phase shift structure is an artificial surface plasmon structure.
2. The phased array satellite bendable phase shifter of claim 1, wherein the bendable phase shifting film structure is a zigzag transmission line film structure.
3. The phase shifter of claim 2, wherein the sawtooth transmission line thin film structure comprises a plurality of periodic units with the same structure, and the sawtooth transmission line thin film structure is formed by the periodic units being connected in sequence.
4. The phase shifter of claim 3, wherein the bendable phase shifting film structure is a unidirectional zigzag transmission line film structure, the periodic units are inverted T-shaped structures and comprise extending portions and base portions, and the periodic units are connected with each other through the base portions to form the unidirectional zigzag transmission line film structure.
5. The phase shifter of claim 4, wherein the thickness of the bendable phase shifting film structure is 2 times the skin depth corresponding to the lowest operating frequency in the pass band.
6. The phase shifter of claim 5, wherein the bendable phase shifting film structure comprises a first connection port and a second connection port, the first connection port and the second connection port are respectively disposed at two ends, and the electrical regulator respectively inputs and outputs a DC bias voltage through the first connection port and the second connection port.
7. The phase shifter of any one of claims 1-6, wherein the bendable phase shifting film structure base material is graphene.
8. A method for controlling a bendable phase shifter of a phased array satellite, which uses the bendable phase shifter as claimed in claim 7, comprising the steps of:
manufacturing an artificial surface plasmon bendable phase shifting structure on a flexible medium substrate;
loading direct current to the artificial surface plasmon bendable phase-shifting structure;
changing the effective length of the waveguide structure of the bendable phase shifting structure of the artificial surface plasmon to reconstruct the phase of the phase shifter;
the base material of the bendable phase-shifting structure of the artificial surface plasmon is graphene.
9. The phased array satellite bendable phase shifter control method according to claim 8, characterized by the steps of: the method for manufacturing the bendable phase shifting structure of the artificial surface plasmon on the flexible medium substrate comprises the following substeps:
coating the base material of the artificial surface plasmon bendable phase-shifting structure on the flexible medium substrate in a magnetron sputtering mode;
the bendable phase shifting structure of the artificial surface plasmons is designed into a one-way sawtooth structure.
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| US6538603B1 (en) * | 2000-07-21 | 2003-03-25 | Paratek Microwave, Inc. | Phased array antennas incorporating voltage-tunable phase shifters |
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| CN109856821A (en) * | 2019-03-27 | 2019-06-07 | 电子科技大学 | Terahertz wave modulator and preparation method based on flexible bismuth nano-pillar/graphene |
| CN110187438A (en) * | 2019-05-15 | 2019-08-30 | 浙江大学 | A kind of tunable waveguide optical grating terrestrial transmitter |
| CN111540988A (en) * | 2020-04-30 | 2020-08-14 | 北京邮电大学 | Ultra-thin flexible circuit bow tie artificial surface plasma microwave broadband band-pass filter |
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2021
- 2021-12-31 CN CN202111678172.0A patent/CN114335933A/en active Pending
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| US6538603B1 (en) * | 2000-07-21 | 2003-03-25 | Paratek Microwave, Inc. | Phased array antennas incorporating voltage-tunable phase shifters |
| CN103531664A (en) * | 2013-10-28 | 2014-01-22 | 苏州大学 | Method for preparing graphene-based phototransistor on flexible substrate |
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