2-bit coding metasurface for simultaneous manipulation of spatial and surface waves

Abstract

The application provides a 2-bit coding metasurface for simultaneously regulating spatial waves and surface waves, which comprises, from bottom to top, a metal bottom plate, a dielectric substrate and a metal patch layer; the metal patch layer is provided with periodically arranged metal patterns; the metal patch layer comprises a metasurface unit and a feeding microstrip line; the feeding microstrip line is periodically arranged along two sides of the metasurface unit; the metasurface unit comprises a transverse unit and a longitudinal unit; the transverse unit is composed of a plurality of periodically arranged first adjustable units, and the longitudinal unit is composed of a plurality of transverse units; the first adjustable unit is provided with a pattern arrangement mode corresponding to surface impedance coding and spatial wave phase coding. In the application, the pattern arrangement mode of the first adjustable unit is designed through the surface impedance coding and the spatial wave phase coding, so that the surface wave is converted into a leaky wave and radiated to free space, and the spatial wave beamforming function is realized, thereby improving the beam regulation strength and the flexibility of the beam regulation.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic materials, specifically relating to a 2-bit encoded metasurface that can simultaneously modulate space waves and surface waves. Background Technology

[0002] Metasurfaces are two-dimensional artificial structures composed of periodic subwavelength units. They have advantages such as low profile, simple fabrication, and easy integration, and have been extensively studied.

[0003] In existing technologies, digitally coded metasurfaces have been proposed to further enhance the ability of metasurfaces to modulate electromagnetic waves. Digitally coded metasurfaces initially used binary codes to digitally encode the transmission / reflection phases. Compared to traditional metasurfaces, digitally coded metasurfaces offer unique intuitive and visual advantages due to their coding characteristics and exhibit exceptional capabilities in manipulating the transmission / reflection phases and amplitudes.

[0004] However, at present, digitally encoded metasurfaces can only encode the phase of space waves and the surface impedance of surface waves with 1 bit. The encoding sequence is simple, and the control of the phase of space waves and the surface impedance are coupled with each other, resulting in low flexibility in the control of space waves and surface waves. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a 2-bit encoded metasurface that simultaneously modulates space waves and surface waves.

[0006] The technical problem to be solved by this invention is achieved through the following technical solution:

[0007] This invention provides a 2-bit coded metasurface that can simultaneously control space waves and surface waves, comprising: a metal base plate, a dielectric substrate, and a metal patch layer arranged from bottom to top;

[0008] The metal patch layer features periodically arranged metal patterns;

[0009] The metal patch layer includes: metasurface units and fed microstrip lines; the fed microstrip lines are periodically arranged along both sides of the metasurface units;

[0010] The metasurface unit includes: transverse units and longitudinal units; the transverse units are composed of multiple periodically arranged first adjustable units, and the longitudinal units are composed of multiple transverse units;

[0011] The first adjustable unit is equipped with a graphic arrangement that corresponds to the surface impedance encoding and the spatial wave phase encoding.

[0012] Optionally, each fed microstrip line is provided with an isosceles trapezoid and multiple second adjustable units; each second adjustable unit is provided with a first rectangular structure and a second rectangular structure;

[0013] The lower base of the isosceles trapezoid is connected to the first side edge of a plurality of first rectangular structures;

[0014] The second side edge of each first rectangular structure connects to the first side edge of the second rectangular structure;

[0015] The second side edge of each second rectangular structure is connected to the central axis of the transverse unit.

[0016] Optionally, a second adjustable unit is provided on each of the left and right sides of each horizontal unit;

[0017] Each isosceles trapezoid has four sets of first rectangular structures corresponding to its lower base.

[0018] Optionally, the length of the first rectangular structure is 4.5mm and the width is 1.5mm;

[0019] The second rectangular structure has a length of 4.5mm and a width of 2mm.

[0020] Optionally, each first adjustable unit is provided with multiple central microstrip line structures; the central microstrip line structure is a symmetrical structure;

[0021] Each central microstrip structure is a combination pattern composed of a third rectangular structure, a fourth rectangular structure, a fifth rectangular structure, a sixth rectangular structure, and a seventh rectangular structure;

[0022] The combined pattern is formed by stacking the third, fourth, fifth, sixth, and seventh rectangular structures from top to bottom.

[0023] The third and seventh rectangular structures have the same dimensions, and the fourth and sixth rectangular structures have the same dimensions.

[0024] Optionally, the combined pattern comes in 9 sizes:

[0025] Dimension 1: The length and width of the third rectangular structure are 3.35mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 1.85mm and 0.7mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 2.4mm respectively; the spatial wave phase code corresponding to dimension 1 is 00, and the surface impedance code is 10;

[0026] Dimension 2: The length and width of the third rectangular structure are 2.69 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.19 mm and 0.9 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.0 mm, respectively; the spatial wave phase code corresponding to dimension 2 is 00, and the surface impedance code is 01;

[0027] Dimension 3: The length and width of the third rectangular structure are 2.1 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.15 mm and 0.6 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 1.5 mm, respectively; the spatial wave phase code and surface impedance code corresponding to dimension 3 are 00;

[0028] Dimension 4: The length and width of the third rectangular structure are 3.71 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 2.21 mm and 0.7 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.4 mm, respectively; the spatial wave phase code corresponding to dimension 4 is 01, and the surface impedance code is 10;

[0029] Dimension 5: The length and width of the third rectangular structure are 3.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 1.7mm and 0.9mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 2.0mm respectively; the spatial wave phase code corresponding to dimension 5 is 01, and the surface impedance code is 01;

[0030] Dimension 6: The length and width of the third rectangular structure are 2.82mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 1.32mm and 1.15mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 1.5mm respectively; the spatial wave phase code corresponding to dimension 6 is 01, and the surface impedance code is 00.

[0031] Dimension 7: The length and width of the third rectangular structure are 4.3mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 2.8mm and 0.7mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 2.4mm respectively; the spatial wave phase code corresponding to dimension 7 is 10, and the surface impedance code is 10.

[0032] Dimension 8: The length and width of the third rectangular structure are 4.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 2.7mm and 0.9mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 2.0mm respectively; the spatial wave phase code corresponding to dimension 8 is 10, and the surface impedance code is 01;

[0033] Dimension 9: The length and width of the third rectangular structure are 4.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure are 2.7mm and 1.15mm respectively; the length and width of the fifth rectangular structure are 4.5mm and 1.5mm respectively; the spatial wave phase code corresponding to dimension 9 is 10, and the surface impedance code is 00.

[0034] Optionally, in the first adjustable unit, dimensions 1 to 9 are arranged according to spatial wave phase encoding and surface impedance encoding;

[0035] The spatial wave phase code is: 0000000000000101010101011010101010;

[0036] The surface impedance code is: 100100100100.

[0037] Optionally, the upper and lower bases of the isosceles trapezoid are 2.25 mm and 15 mm in length, respectively, and the height of the isosceles trapezoid is 20 mm.

[0038] Optionally, the area of ​​the metal base plate, the dielectric substrate, and the metal patch layer are all 382×144mm. 2 ;

[0039] The dielectric substrate has a thickness of 1.524 mm and a relative permittivity of 6.15.

[0040] One end of the power-feeding microstrip line is connected to an SMA connector.

[0041] Optionally, the lateral unit includes four first adjustable units;

[0042] The vertical unit comprises 72 horizontal units.

[0043] This invention provides a 2-bit coded metasurface for simultaneously controlling space waves and surface waves, comprising: a metal substrate, a dielectric substrate, and a metal patch layer arranged sequentially from bottom to top; the metal patch layer has periodically arranged metal patterns; the metal patch layer includes: metasurface units and fed microstrip lines; the fed microstrip lines are periodically arranged along both sides of the metasurface units; the metasurface units include: transverse units and longitudinal units; the transverse units are composed of multiple periodically arranged first adjustable units, and the longitudinal units are composed of multiple transverse units; the first adjustable units have a pattern arrangement corresponding to surface impedance encoding and space wave phase encoding. In this invention, the pattern arrangement of the first adjustable units is designed through surface impedance encoding and space wave phase encoding. Based on the principle of periodic impedance modulation, the surface waves transmitted on the metasurface are converted into leakage waves radiated into free space; based on space wave phase encoding and utilizing the change in the phase of the space wave, the space wave beamforming function is realized, improving the beam control strength and flexibility.

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0045] Figure 1 Detailed diagrams of the metasurface unit and the fed microstrip line provided in the embodiments of the present invention;

[0046] Figure 2 This is an overall structural diagram of a 2-bit encoded metasurface that simultaneously modulates space waves and surface waves, provided in an embodiment of the present invention.

[0047] Figure 3 Simulated far-field radiation pattern of the three-beam shaping effect of space waves provided in the embodiments of the present invention;

[0048] Figure 4 The simulated far-field radiation pattern for converting surface waves into leaky waves is provided for embodiments of the present invention. Detailed Implementation

[0049] Most single-layer metasurfaces currently available can only control space waves or surface waves, meaning that only one function can be achieved on a single metasurface, and dual or multi-functional functions are not possible.

[0050] This invention provides a 2-bit coded metasurface that can simultaneously control space waves and surface waves. The phase of the space wave and the impedance of the surface wave are independently controlled by the metal pattern parameters. Using the structure of this invention, the dual functions of space wave beamforming and surface wave conversion into leakage waves can be realized on a single metasurface.

[0051] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0052] To improve the beam control strength and flexibility, this invention provides a 2-bit coded metasurface that can simultaneously control space waves and surface waves, comprising: a metal base plate, a dielectric substrate, and a metal patch layer arranged from bottom to top;

[0053] The metal patch layer features periodically arranged metal patterns;

[0054] The metal patch layer includes: metasurface units and fed microstrip lines; the fed microstrip lines are periodically arranged along both sides of the metasurface units;

[0055] The metasurface unit includes: transverse units and longitudinal units; the transverse units are composed of multiple periodically arranged first adjustable units, and the longitudinal units are composed of multiple transverse units;

[0056] The first adjustable unit is equipped with a graphic arrangement that corresponds to the surface impedance encoding and the spatial wave phase encoding.

[0057] It should be noted that in this embodiment, the thickness of the metasurface unit, the fed microstrip line, and the metal substrate is all 0.018 mm.

[0058] This invention provides a 2-bit coded metasurface for simultaneously controlling space waves and surface waves, comprising: a metal substrate, a dielectric substrate, and a metal patch layer arranged sequentially from bottom to top; the metal patch layer has periodically arranged metal patterns; the metal patch layer includes: metasurface units and fed microstrip lines; the fed microstrip lines are periodically arranged along both sides of the metasurface units; the metasurface units include: transverse units and longitudinal units; the transverse units are composed of multiple periodically arranged first adjustable units, and the longitudinal units are composed of multiple transverse units; the first adjustable units have a pattern arrangement corresponding to surface impedance encoding and space wave phase encoding. In this invention, the pattern arrangement of the first adjustable units is designed through surface impedance encoding and space wave phase encoding. Based on the principle of periodic impedance modulation, the surface waves transmitted on the metasurface are converted into leakage waves radiated into free space; based on space wave phase encoding and utilizing the change in the phase of the space waves, space wave beamforming is achieved, improving the beam control strength and flexibility.

[0059] To clearly illustrate the structure of the metasurface unit and the fed microstrip line provided in the embodiments of the present invention Figure 1 Detailed diagrams of the metasurface unit and the fed microstrip line provided in the embodiments of the present invention. Figure 2 This is an overall structural diagram of a 2-bit coded metasurface that simultaneously modulates space waves and surface waves, provided as an embodiment of the present invention. Figure 1 As shown, each feed microstrip line is provided with an isosceles trapezoid 10 and multiple second adjustable units; each second adjustable unit is provided with a first rectangular structure 7 and a second rectangular structure 8;

[0060] The lower base of the isosceles trapezoid 10 is connected to the first side edge of a plurality of first rectangular structures 7;

[0061] The second side edge of each first rectangular structure 7 connects to the first side edge of the second rectangular structure 8;

[0062] The second side edge of each second rectangular structure 8 is connected to the central axis of the transverse unit.

[0063] Optionally, a second adjustable unit is provided on each of the left and right sides of each horizontal unit;

[0064] Each isosceles trapezoid 10 has four sets of first rectangular structures 7 corresponding to its lower base.

[0065] Optionally, the length of the first rectangular structure 7 is 4.5 mm and the width is 1.5 mm;

[0066] The second rectangular structure 8 has a length of 4.5mm and a width of 2mm.

[0067] Optionally, each first adjustable unit is provided with multiple central microstrip line structures 1; the central microstrip line structure 1 is a symmetrical structure;

[0068] Each central microstrip structure 1 is a combination pattern composed of a third rectangular structure 2, a fourth rectangular structure 3, a fifth rectangular structure 4, a sixth rectangular structure 5, and a seventh rectangular structure 6;

[0069] The combined pattern is formed by stacking the third rectangular structure 2, the fourth rectangular structure 3, the fifth rectangular structure 4, the sixth rectangular structure 5, and the seventh rectangular structure 6 from top to bottom;

[0070] Among them, the third rectangular structure 2 and the seventh rectangular structure 6 have the same size, and the fourth rectangular structure 3 and the sixth rectangular structure 5 have the same size.

[0071] Optionally, the combined pattern comes in 9 sizes:

[0072] Dimension 1: The length and width of the third rectangular structure 2 are 3.35mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 1.85mm and 0.7mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.4mm respectively; the spatial wave phase code corresponding to dimension 1 is 00, and the surface impedance code is 10;

[0073] Dimension 2: The length and width of the third rectangular structure 2 are 2.69mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 1.19mm and 0.9mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.0mm respectively; the spatial wave phase code corresponding to dimension 2 is 00, and the surface impedance code is 01;

[0074] Dimension 3: The length and width of the third rectangular structure 2 are 2.1mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 1.15mm and 0.6mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 1.5mm respectively; the spatial wave phase code corresponding to dimension 3 is 00, and the surface impedance code is 00.

[0075] Dimension 4: The length and width of the third rectangular structure 2 are 3.71mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 2.21mm and 0.7mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.4mm respectively; the spatial wave phase code corresponding to dimension 4 is 01, and the surface impedance code is 10;

[0076] Dimension 5: The length and width of the third rectangular structure 2 are 3.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 1.7mm and 0.9mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.0mm respectively; the spatial wave phase code corresponding to dimension 5 is 01, and the surface impedance code is 01;

[0077] Dimension 6: The length and width of the third rectangular structure 2 are 2.82mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 1.32mm and 1.15mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 1.5mm respectively; the spatial wave phase code corresponding to dimension 6 is 01, and the surface impedance code is 00.

[0078] Dimension 7: The length and width of the third rectangular structure 2 are 4.3mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 2.8mm and 0.7mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.4mm respectively; the spatial wave phase code corresponding to dimension 7 is 10, and the surface impedance code is 10.

[0079] Dimension 8: The length and width of the third rectangular structure 2 are 4.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 2.7mm and 0.9mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 2.0mm respectively; the spatial wave phase code corresponding to dimension 8 is 10, and the surface impedance code is 01;

[0080] Dimension 9: The length and width of the third rectangular structure 2 are 4.2mm and 0.2mm respectively; the length and width of the fourth rectangular structure 3 are 2.7mm and 1.15mm respectively; the length and width of the fifth rectangular structure 4 are 4.5mm and 1.5mm respectively; the spatial wave phase code corresponding to dimension 9 is 10, and the surface impedance code is 00.

[0081] Optionally, in the first adjustable unit, dimensions 1 to 9 are arranged according to spatial wave phase encoding and surface impedance encoding;

[0082] The spatial wave phase code is: 0000000000000101010101011010101010;

[0083] The surface impedance code is: 100100100100.

[0084] In this embodiment of the invention, the surface wave modulation of the metasurface is based on the principle of periodic impedance modulation. By designing a surface impedance coding sequence 100100100100…, the surface wave transmitted on the metasurface is converted into a leakage wave that scans with frequency. The beamforming function of the encoded metasurface space wave is based on the principle of antenna array pattern synthesis. By designing a space wave phase coding sequence, the beamforming function of the reflected wave is realized.

[0085] Optionally, the upper and lower bases of the isosceles trapezoid 10 are 2.25 mm and 15 mm in length, respectively, and the height of the isosceles trapezoid 10 is 20 mm.

[0086] Optionally, the area of ​​the metal base plate, the dielectric substrate, and the metal patch layer are all 382×144mm. 2 ;

[0087] The dielectric substrate has a thickness of 1.524 mm and a relative permittivity of 6.15.

[0088] One end of the power-feeding microstrip line is connected to an SMA connector 9.

[0089] It should be noted that, in this embodiment of the invention, one end of the SMA connector 9 is connected to the power supply microstrip line, and the other end of the SMA connector 9 is connected to the metal base plate, and the metal base plate is connected to the outer sheath of the SMA connector 9.

[0090] Optionally, the lateral unit includes four first adjustable units;

[0091] The vertical unit comprises 72 horizontal units.

[0092] It should be noted that the above structural limitation is only for the 2-bit encoding metasurface. When it is necessary to set the encoding metasurface for other bits, it can be achieved by adjusting the number of the first adjustable unit and the number of horizontal units.

[0093] The 2-bit encoded metasurface design for simultaneously controlling space waves and surface waves provided in this invention mainly achieves space wave beamforming and surface wave conversion into frequency-scanning leaky waves by independently controlling the phase of the space wave and the surface impedance, designing the encoding sequence, and based on the phase-changing array pattern and the periodic control of the surface impedance.

[0094] To illustrate the effect of the 2-bit encoded metasurface that simultaneously modulates space waves and surface waves according to the present invention, simulation results are also provided in this embodiment. Figure 3 The simulated far-field radiation pattern of the three-beam shaping effect for space waves provided in this embodiment of the invention. For example... Figure 3As shown, the center frequency of the space wave operating frequency band is 22.5 GHz. The three-beam simulation far-field radiation pattern shows that a beam is formed at -19.0°, 9.93° and 0°, which indicates that the metasurface successfully modulates the space wave. Figure 4 This is a simulated far-field radiation pattern for converting surface waves into leaky waves, provided as an embodiment of the present invention. For example... Figure 4 As shown, the leaky wave operating frequency band is 6.5-11.4GHz, and the scanning angle is adjusted from -54° to 52°.

[0095] It should be noted that the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0097] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings and the disclosure in carrying out the claimed invention. In the description of the invention, the word "comprising" does not exclude other components or steps, "a" or "an" does not exclude a plurality, and "a plurality" means two or more, unless otherwise explicitly specified. Furthermore, while different embodiments may describe certain measures, this does not mean that these measures cannot be combined to produce good results.

[0098] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A 2-bit coded metasurface that simultaneously modulates space waves and surface waves, characterized in that, include: From bottom to top, the layers are arranged as follows: metal base plate, dielectric substrate, and metal patch layer; The metal patch layer is provided with periodically arranged metal patterns; The metal patch layer includes: a metasurface unit and a fed microstrip line; the fed microstrip line is periodically arranged along both sides of the metasurface unit; The metasurface unit includes: a transverse unit and a longitudinal unit; the transverse unit is composed of a plurality of periodically arranged first adjustable units, and the longitudinal unit is composed of a plurality of the transverse units; The first adjustable unit is provided with a graphic arrangement corresponding to the surface impedance encoding and the spatial wave phase encoding; Each of the fed microstrip lines is provided with an isosceles trapezoid and multiple second adjustable units; each of the second adjustable units is provided with a first rectangular structure and a second rectangular structure; The lower base of the isosceles trapezoid is connected to the first side edge of the plurality of first rectangular structures; The second side edge of each of the first rectangular structures connects to the first side edge of the second rectangular structure; The second side edge of each of the second rectangular structures is connected to the central axis of the transverse unit; Each of the horizontal units has a set of the second adjustable units on its left and right sides; Each of the isosceles trapezoids has four sets of the first rectangular structures corresponding to its lower base. Each of the first adjustable units is provided with multiple central microstrip line structures; the central microstrip line structures are symmetrical structures. Each of the central microstrip line structures is a combination pattern composed of a third rectangular structure, a fourth rectangular structure, a fifth rectangular structure, a sixth rectangular structure, and a seventh rectangular structure; The combined pattern is formed by stacking the third, fourth, fifth, sixth, and seventh rectangular structures sequentially from top to bottom; The third rectangular structure and the seventh rectangular structure have the same size, and the fourth rectangular structure has the same size as the sixth rectangular structure.

2. The 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 1, characterized in that, The first rectangular structure has a length of 4.5 mm and a width of 1.5 mm; The second rectangular structure has a length of 4.5 mm and a width of 2 mm.

3. A 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 1, characterized in that, The combined pattern comes in nine sizes: Dimension 1: The length and width of the third rectangular structure are 3.35 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.85 mm and 0.7 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.4 mm, respectively; the spatial wave phase code corresponding to dimension 1 is 00, and the surface impedance code is 10; Dimension 2: The length and width of the third rectangular structure are 2.69 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.19 mm and 0.9 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.0 mm, respectively; the spatial wave phase code corresponding to dimension 2 is 00, and the surface impedance code is 01; Dimension 3: The length and width of the third rectangular structure are 2.1 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.15 mm and 0.6 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 1.5 mm, respectively; the spatial wave phase code and surface impedance code corresponding to dimension 3 are 00; Dimension 4: The length and width of the third rectangular structure are 3.71 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 2.21 mm and 0.7 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.4 mm, respectively; the spatial wave phase code corresponding to dimension 4 is 01, and the surface impedance code is 10; Dimension 5: The length and width of the third rectangular structure are 3.2 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.7 mm and 0.9 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.0 mm, respectively; the spatial wave phase code corresponding to dimension 5 is 01, and the surface impedance code is 01; Dimension 6: The length and width of the third rectangular structure are 2.82 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 1.32 mm and 1.15 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 1.5 mm, respectively; the spatial wave phase code corresponding to dimension 6 is 01, and the surface impedance code is 00; Dimension 7: The length and width of the third rectangular structure are 4.3 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 2.8 mm and 0.7 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.4 mm, respectively; the spatial wave phase code corresponding to dimension 7 is 10, and the surface impedance code is 10; Dimension 8: The length and width of the third rectangular structure are 4.2 mm and 0.2 mm, respectively; the length and width of the fourth rectangular structure are 2.7 mm and 0.9 mm, respectively; the length and width of the fifth rectangular structure are 4.5 mm and 2.0 mm, respectively; the spatial wave phase code corresponding to dimension 8 is 10, and the surface impedance code is 01; Dimension 9: The length and width of the third rectangular structure are 4.2mm and 0.2mm, respectively; the length and width of the fourth rectangular structure are 2.7mm and 1.15mm, respectively; the length and width of the fifth rectangular structure are 4.5mm and 1.5mm, respectively; the spatial wave phase code corresponding to dimension 9 is 10, and the surface impedance code is 00.

4. A 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 3, characterized in that, In the first adjustable unit, dimensions 1 to 9 are arranged according to spatial wave phase encoding and surface impedance encoding; The spatial wave phase code is: 0000000000000010101010101101010101010; The surface impedance is encoded as: 100100100100.

5. A 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 1, characterized in that, The upper and lower bases of the isosceles trapezoid have lengths of 2.25 mm and 15 mm, respectively, and the height of the isosceles trapezoid is 20 mm.

6. A 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 1, characterized in that, The area of ​​the metal base plate, the dielectric substrate, and the metal patch layer is 382×144mm. 2 ; The dielectric substrate has a thickness of 1.524 mm and a relative permittivity of 6.

15. One end of the power-feeding microstrip line is connected to an SMA connector.

7. A 2-bit coded metasurface for simultaneously controlling space waves and surface waves according to claim 1, characterized in that, The lateral unit includes four first adjustable units; The longitudinal unit comprises 72 transverse units.

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