A signal transmitting system, a signal receiving system, a signal transmitting method, and an apparatus.

Abstract

This specification discloses a signal transmitting system, a signal receiving system, a signal transmitting method, and an apparatus. In the signal transmitting system provided in this specification, a control chip controls the transmission of a designated signal generated by a signal source to first and second frequency modulation devices. This allows the first and second frequency modulation devices to determine their own useful signals corresponding to the information to be transmitted based on whether they have received the designated signal. They then modulate carrier waves according to their own useful signals to obtain a first radio frequency signal and a second radio frequency signal in the terahertz frequency band, respectively. The transmission of the information to be transmitted is achieved by generating and transmitting coaxially transmitted dual-mode orbital angular momentum electromagnetic waves through metasurface devices. The system can generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves in the terahertz frequency band, thus transmitting the information to be transmitted to the signal receiving end.

Description

Technical Field

[0001] This specification relates to the field of communication technology, and in particular to a signal transmitting system, a signal receiving system, a signal transmitting method, and an apparatus. Background Technology

[0002] With the development of the wireless communication industry, spectrum resources are becoming increasingly scarce. The contradiction between the increasing demand for radio spectrum and the limited spectrum resources is becoming more and more prominent. In order to alleviate the existing contradiction, a new wireless communication method is urgently needed.

[0003] Helical electromagnetic waves possess orbital angular momentum. The orthogonality between orbital angular momentum of different modes provides a new research direction for wireless communication.

[0004] To address the increasingly scarce spectrum resources, this specification provides a signal transmission and reception method based on orbital angular momentum. Summary of the Invention

[0005] This specification provides a signal transmitting system, a signal receiving system, a signal transmitting method, and an apparatus to at least partially solve the aforementioned problems.

[0006] The following technical solution is adopted in this specification:

[0007] This specification provides a signal transmission system, the system comprising: a signal source, a carrier generator, a first frequency modulation device, a second frequency modulation device, a control chip, and a metasurface device; wherein:

[0008] The signal source is used to generate the specified signal;

[0009] The control chip is used to control whether to transmit the specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted according to whether the specified signal is received;

[0010] The carrier generator is used to generate a carrier and transmit the carrier to the first frequency modulation device and the second frequency modulation device;

[0011] The first frequency modulation device is used to modulate the carrier received by the first frequency modulation device itself according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz frequency band, and output the first radio frequency signal to the metasurface device from a first direction.

[0012] The second frequency modulation device is used to modulate the carrier received by the second frequency modulation device itself according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and output the second radio frequency signal to the metasurface device from the second direction;

[0013] The metasurface device is used to output a dual-mode orbital angular momentum electromagnetic wave that propagates coaxially along a third direction based on the first radio frequency signal and the second radio frequency signal.

[0014] Optionally, the first frequency modulation device includes at least: a first frequency multiplier and a first frequency mixer;

[0015] The first frequency multiplier is used to tune the carrier frequency to the terahertz band and send it to the first mixer;

[0016] The first mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the first mixer itself based on the useful signal determined by the first mixer itself, so as to obtain a first radio frequency signal in the terahertz band.

[0017] Optionally, the first frequency modulation device further includes: a first bandpass filter;

[0018] The first frequency multiplier is specifically used to modulate the carrier frequency to obtain a terahertz wave, and send the terahertz wave to the first bandpass filter;

[0019] The first bandpass filter is specifically used to receive the terahertz wave sent by the first frequency multiplier, filter the received terahertz wave to obtain the carrier of the first specified terahertz frequency band, and send it to the first mixer.

[0020] Optionally, the second frequency modulation device includes at least: a second frequency multiplier and a second frequency mixer;

[0021] The second frequency multiplier is used to tune the carrier frequency to the terahertz band and send it to the second mixer;

[0022] The second mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the second mixer itself based on the useful signal determined by the second mixer itself, so as to obtain a second radio frequency signal in the terahertz band.

[0023] Optionally, the second frequency modulation device further includes: a second bandpass filter;

[0024] The second frequency multiplier is specifically used to modulate the carrier frequency to obtain a terahertz wave, and send the terahertz wave to the second bandpass filter;

[0025] The second bandpass filter is specifically used to receive the terahertz wave sent by the second frequency multiplier, filter the received terahertz wave to obtain the carrier of the second specified terahertz frequency band, and send it to the second mixer.

[0026] Optionally, the signal transmitting system further includes a first power amplifier and a second power amplifier;

[0027] The first frequency modulation device is specifically used to transmit the first radio frequency signal to the first power amplifier, and through the first power amplifier, output the power-amplified first radio frequency signal to the metasurface device from the first direction;

[0028] The second frequency modulation device is specifically used to transmit the second radio frequency signal to the second power amplifier, and through the second power amplifier, output the power-amplified second radio frequency signal from the second direction to the metasurface device.

[0029] Optionally, the control chip is a microcontroller.

[0030] This specification provides a signal receiving system, the system comprising: a signal separation device and a demodulation device; wherein:

[0031] The signal separation device is used to receive dual-mode orbital angular momentum electromagnetic waves in the terahertz band and separate the dual-mode orbital angular momentum electromagnetic waves into a first received signal transmitted along the fourth direction and a second received signal transmitted along the fifth direction.

[0032] The demodulation device is used to demodulate the first received signal to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave, and to demodulate the second received signal to obtain the second information carried by the dual-mode orbital angular momentum electromagnetic wave.

[0033] The first information and the second information are the transmission information to be used by the signal transmission system to modulate the carrier wave.

[0034] Optionally, the signal separation device includes: a reconstruction board, a compensation board, and a lens;

[0035] The reconstruction plate is used to transform the dual-mode orbital angular momentum electromagnetic wave into a linear wave to obtain a first linear wave.

[0036] The compensation plate is used to receive the first linear wave obtained by the reconstruction plate and remove the noise phase of the first linear wave to obtain the second linear wave.

[0037] The lens is used to separate a first received signal transmitted along a fourth direction and a second received signal transmitted along a fifth direction based on the second linear wave.

[0038] Optionally, the demodulation device includes a first down-conversion module, a second down-conversion module, a third power amplifier, and a fourth power amplifier;

[0039] The first down-conversion module is used to receive the first received signal, reduce the frequency band of the first received signal from the terahertz band to a specified frequency band to obtain the first frequency-converted signal, and input the first frequency-converted signal into the third power amplifier;

[0040] The third power amplifier is used to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave based on the first frequency conversion signal.

[0041] The second down-conversion module is used to receive the second received signal, reduce the frequency band of the second received signal from the terahertz band to the specified frequency band to obtain the second frequency-converted signal, and input the second frequency-converted signal into the fourth power amplifier;

[0042] The fourth power amplifier is used to obtain the second information carried by the dual-mode orbital angular momentum electromagnetic wave based on the second frequency conversion signal.

[0043] Optionally, the signal receiving system further includes: a display;

[0044] The display is used to show the first information and the second information.

[0045] This specification provides a signal transmission method for use in a control chip, the method comprising:

[0046] Obtain the information to be transmitted;

[0047] The system controls whether to transmit a specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device based on the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received.

[0048] The useful signal is used to enable the first frequency modulation device to modulate the carrier received by the first frequency modulation device itself according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz band, and to output the first radio frequency signal to the metasurface device from a first direction; and to enable the second frequency modulation device to modulate the carrier received by the second frequency modulation device itself according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz band, and to output the second radio frequency signal to the metasurface device from a second direction; the first radio frequency signal and the second radio frequency signal are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave that propagates coaxially along a third direction.

[0049] This specification provides a signal transmitting device for use in a control chip, the device comprising:

[0050] The acquisition module is used to acquire the information to be transmitted.

[0051] A modulation and transmission module is used to control whether to transmit a designated signal generated by a signal source to a first frequency modulation device and a second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the designated signal is received; wherein, the useful signal is used to enable the first frequency modulation device to modulate the carrier received by the first frequency modulation device according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz frequency band, and output the first radio frequency signal to the metasurface device from a first direction, and to enable the second frequency modulation device to modulate the carrier received by the second frequency modulation device according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and output the second radio frequency signal to the metasurface device from a second direction; the first radio frequency signal and the second radio frequency signal are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave coaxially propagating along a third direction.

[0052] This specification provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described signal transmission method.

[0053] This specification provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described signal transmission method.

[0054] The at least one technical solution adopted in this specification can achieve the following beneficial effects: Through the signal transmission system provided in this specification, the designated signal generated by the control chip's control signal source can be transmitted to the first and second frequency modulation devices respectively. This allows the first and second frequency modulation devices to determine their own useful signals corresponding to the information to be transmitted based on whether they have received the designated signal. They then modulate the carrier wave according to their own useful signals to obtain a first radio frequency signal and a second radio frequency signal in the terahertz frequency band, respectively. These signals are then used to generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves through metasurface devices, thereby realizing the transmission of the information to be transmitted. The system can generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves in the terahertz frequency band, thus realizing the transmission of the information to be transmitted. Attached Figure Description

[0055] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and their descriptions, serving to explain this specification and do not constitute an undue limitation thereof.

[0056] In the picture:

[0057] Figure 1 This is a schematic diagram of a signal transmission system provided in this specification;

[0058] Figure 2 This is a schematic diagram of a signal transmission system provided in this specification;

[0059] Figure 3 This is a schematic diagram of a signal receiving system provided in this specification;

[0060] Figure 4 This is a schematic diagram of a signal separation device provided in this specification;

[0061] Figure 5 This is a schematic diagram of a demodulation device provided in this specification;

[0062] Figure 6 This is a flowchart illustrating a signal transmission method provided in this specification;

[0063] Figure 7 This is a schematic diagram of a signal transmitting device provided in this specification;

[0064] Figure 8 This is a schematic diagram of an electronic device provided in this specification. Detailed Implementation

[0065] Because spiral electromagnetic waves possess orbital angular momentum, and different modes of orbital angular momentum are orthogonal, if orbital angular momentum electromagnetic waves can be generated and transmitted, it is possible to transmit multiple pieces of information via a single carrier wave. Of course, the multiple pieces of information transmitted simultaneously must correspond to different modes of the orbital angular momentum electromagnetic waves to ensure the orthogonality between them and prevent interference.

[0066] Therefore, this specification utilizes the orthogonality of orbital angular momentum electromagnetic waves of different modes to achieve wireless information transmission.

[0067] Furthermore, since the spectrum resources of commonly used frequency bands in the field of wireless communication are almost exhausted, this specification proposes to implement wireless communication in a new frequency band—the terahertz band—to solve the problems existing in current wireless communication technologies.

[0068] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0069] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0070] Figure 1 This is a schematic diagram of a signal transmission system provided in this specification. The system includes: a signal source, a carrier generator, a first frequency modulation device, a second frequency modulation device, a control chip, and metasurface devices. Wherein:

[0071] This signal source is used to generate the specified signal.

[0072] In one or more embodiments of this specification, the signal source can be an arbitrary waveform generator.

[0073] The control chip is used to control whether to transmit the specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device can determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received.

[0074] Figure 1 In the diagram, besides the solid arrow pointing from the carrier generator to the first frequency modulation device, another solid arrow pointing to the first frequency modulation device indicates that the specified signal is transmitted to the first frequency modulation device. A dashed arrow pointing to the first frequency modulation device indicates that the specified signal is not transmitted to the first frequency modulation device. Figure 1In the diagram, besides the solid arrow pointing from the carrier generator to the second frequency modulation device, another solid arrow pointing to the second frequency modulation device indicates that the specified signal is transmitted to the second frequency modulation device. A dashed arrow pointing to the second frequency modulation device indicates that the specified signal is not transmitted to the second frequency modulation device.

[0075] The control chip controls whether to transmit the specified signal generated by the signal source to the first and second frequency modulation devices. This control can be achieved through a first switch between the control chip and the first frequency modulation device. Figure 1 (Not shown in the diagram), and a second switch between the control chip and the second frequency modulation device. That is, the control chip can control whether to transmit the specified signal generated by the signal source to the first frequency modulation device by controlling the first switch, and control the second switch (not shown in the diagram). Figure 1 (Not shown in the image), controls whether to transmit the specified signal generated by the signal source to the second frequency modulation device.

[0076] In one or more embodiments of this specification, the information to be transmitted may include first information to be transmitted corresponding to the first frequency modulation device and second information to be transmitted corresponding to the second frequency modulation device.

[0077] In one or more embodiments of this specification, the designated signal may be used to represent a specific meaning or may have no meaning, as long as the first frequency modulation device and the second frequency modulation device can determine the useful signal based on whether they receive the designated signal.

[0078] The first and second pieces of information to be transmitted can be two different and unrelated pieces of information, such as information about two users, or different service information of the same user. Alternatively, the first and second pieces of information to be transmitted can also be used to represent the same piece of information, such as the same service information of the same user.

[0079] Taking the example where the first information to be transmitted and the second information to be transmitted represent the same information, assuming the first information to be transmitted is represented by 101 and the second information to be transmitted is represented by 011. The first frequency modulation device and the second frequency modulation device can determine that the useful signal is 1 when a specified signal is received, and determine that the useful signal is 0 when the specified signal is not received.

[0080] When transmitting the first bit "1" of the first information to be transmitted, the control chip can control the transmission of the designated signal to the first frequency modulation device, which can determine that the useful signal is 1. When transmitting the second bit "0" of the first information to be transmitted, the control chip can control the designated signal not to be transmitted to the first frequency modulation device, which can determine that the useful signal is 0. When transmitting the third bit "1" of the first information to be transmitted, the control chip can control the transmission of the designated signal to the first frequency modulation device, which can determine that the useful signal is 1. That is, if the first frequency modulation device does not receive the designated signal, it can determine that the useful signal is 0; otherwise, it determines that the useful signal is 1.

[0081] When transmitting the first bit of the second information to be transmitted, "0", the control chip can control the designated signal not to be transmitted to the second frequency modulation device, and the second frequency modulation device can determine that the useful signal is 0. When transmitting the second bit of the second information to be transmitted, "1", the control chip can control the designated signal to be transmitted to the second frequency modulation device, and the second frequency modulation device can determine that the useful signal is 1. When transmitting the third bit of the second information to be transmitted, "1", the control chip can control the designated signal to be transmitted to the second frequency modulation device, and the second frequency modulation device can determine that the useful signal is 1.

[0082] In this system, data with the same bits in the first and second transmitted information are transmitted simultaneously. Therefore, when the signal transmitting system transmits an orbital angular momentum electromagnetic wave carrying the first bit "1" of the first transmitted information and the first bit "0" of the second transmitted information, the signal receiving system can receive and demodulate the data represented as "10". When the signal transmitting system transmits an orbital angular momentum electromagnetic wave carrying the second bit "0" of the first transmitted information and the second bit "1" of the second transmitted information, the signal receiving system can receive and demodulate the data represented as "01". When the signal transmitting system transmits an orbital angular momentum electromagnetic wave carrying the third bit "1" of the first and second transmitted information, the signal receiving system can receive and demodulate the data represented as "11".

[0083] That is, the information to be transmitted is transmitted in the form of keying signals 10, 01, and 11. Different keying signals can represent different meanings and can be used to reconstruct the information to be transmitted.

[0084] Furthermore, the useful signal corresponding to the information to be transmitted, determined by the first frequency modulation device and the second frequency modulation device, can be the same or different depending on whether the designated signal is received.

[0085] It should be noted that this manual does not restrict the specific type of control chip used. For example, the control chip can be a microcontroller.

[0086] Alternatively, in one or more embodiments of this specification, the control chip may also be a field-programmable gate array (FPGA) or similar chip.

[0087] Based on the control chip's control of the first and second switches, the transmission of the specified signal to the first and second frequency modulation devices can be quickly controlled, thereby enabling the first and second frequency modulation devices to quickly determine their corresponding useful signals. This allows the first and second radio frequency signals to be generated quickly and input to the metasurface device, achieving rapid transmission of dual-mode orbital angular momentum electromagnetic waves.

[0088] In this specification, the carrier generator can be used to generate a carrier and transmit the carrier to the first frequency modulation device and the second frequency modulation device.

[0089] In one or more embodiments of this specification, the carrier generator may specifically be a local oscillator signal source for providing a 12.5 GHz carrier.

[0090] The carrier frequencies transmitted to the first frequency modulation device and the carrier frequencies of the second frequency modulation device can be the same or different.

[0091] The first frequency modulation device is used to modulate the carrier received by the first frequency modulation device itself according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz band, and output the first radio frequency signal to the metasurface device from the first direction.

[0092] The second frequency modulation device is used to modulate the carrier received by the second frequency modulation device itself according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and output the second radio frequency signal to the metasurface device from the second direction.

[0093] This metasurface device can be used to output a dual-mode orbital angular momentum electromagnetic wave that propagates coaxially along a third direction, based on a first radio frequency signal and a second radio frequency signal. That is, it enables the transmission of a dual-mode orbital angular momentum electromagnetic wave carrying the information to be transmitted to the receiving end.

[0094] based on Figure 1The signal transmission system shown enables the control chip to control the signal source to transmit a specified signal to the first and second frequency modulation devices. The first and second frequency modulation devices can determine their own useful signals corresponding to the information to be transmitted based on whether they have received the specified signal. They then modulate carrier waves according to their useful signals to obtain a first radio frequency signal and a second radio frequency signal in the terahertz band, respectively. These signals are then used to generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves via metasurface devices, thereby achieving the transmission of the information to be transmitted. The system can generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves in the terahertz band, realizing the transmission of the information to be transmitted to the signal receiving end.

[0095] In one or more embodiments of this specification, the equivalent phase function φ1(x1,y1) of the metasurface device is shown below:

[0096]

[0097] Where l1 and l2 both represent modes, θ i1 θ represents the angle between the first radio frequency signal and the direction perpendicular to the metasurface device. i2 This indicates the angle between the second radio frequency signal and the direction perpendicular to the metasurface device.

[0098] In one or more embodiments of this specification, θ i1 =30°, θ i2 = -30°. Of course, other angles can be used, but this instruction manual does not impose any restrictions. i is the imaginary unit.

[0099] in, The carrier wave vector in the terahertz band is represented by λ, where λ is the wavelength. x1 and y1 represent the coordinates of the metasurface device along the x and y axes, respectively. The z-axis is the vertical direction of the metasurface device. x is the horizontal coordinate axis, and y is the vertical coordinate axis.

[0100] In one or more embodiments of this specification, l1 = 1, l2 = -1.

[0101] Based on this equivalent phase function, after the first radio frequency signal and the second radio frequency signal are input into the metasurface device, a dual-mode orbital angular momentum electromagnetic wave signal with modes l1 and l2 can be obtained by coaxial transmission behind the metasurface device.

[0102] In addition, since the carrier generated by the signal source is not a wave in the terahertz frequency band, the carrier needs to be up-converted to obtain a carrier in the terahertz frequency band, and then the carrier in the terahertz frequency band can be modulated according to the useful signal.

[0103] Therefore, in one or more embodiments of this specification, the first frequency modulation device may include at least: a first frequency multiplier and a first frequency mixer.

[0104] The first frequency multiplier can be used to tune the carrier to the terahertz band and send it to the first mixer.

[0105] The first mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the first mixer itself based on the useful signal determined by the first mixer itself, so as to obtain the first radio frequency signal in the terahertz band.

[0106] Furthermore, since other harmonics may occur as noise during the up-conversion process, in one or more embodiments of this specification, the first frequency modulation device further includes a first bandpass filter.

[0107] Therefore, the first frequency multiplier can be specifically used to modulate the carrier frequency to obtain a terahertz wave, and send the terahertz wave to the first bandpass filter.

[0108] The first bandpass filter is specifically used to receive the terahertz wave sent by the first frequency multiplier, filter the received terahertz wave to obtain the carrier of the first specified terahertz frequency band, and send it to the first mixer.

[0109] Then, the first mixer can determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and modulate the carrier of the terahertz band received by the first mixer itself based on the useful signal determined by the first mixer itself, so as to obtain the first radio frequency signal in the terahertz band.

[0110] In one or more embodiments of this specification, the second frequency modulation device includes at least: a second frequency multiplier and a second frequency mixer.

[0111] The second frequency multiplier can be used to tune the carrier to the terahertz band and send it to the second mixer.

[0112] The second mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the second mixer itself based on the useful signal determined by the second mixer itself, so as to obtain a second radio frequency signal in the terahertz band.

[0113] In one or more embodiments of this specification, the second frequency modulation device further includes: a second bandpass filter.

[0114] The second frequency multiplier is specifically used to modulate the carrier frequency to obtain a terahertz wave, and then send the obtained terahertz wave to the second bandpass filter.

[0115] The second bandpass filter is specifically used to receive the terahertz wave sent by the second frequency multiplier, filter the received terahertz wave to obtain the carrier of the second specified terahertz frequency band, and send it to the second mixer.

[0116] The second mixer can determine the useful signal corresponding to the information to be transmitted based on whether a specified signal is received, and modulate the carrier of the terahertz band received by the second mixer itself based on the useful signal determined by the second mixer itself, so as to obtain a second radio frequency signal in the terahertz band.

[0117] It should be noted that the carrier frequencies of the first designated terahertz band and the second designated terahertz band can be the same or different.

[0118] In one or more embodiments of this specification, when the carrier output by the carrier generator is a 12.5 GHz carrier, the first frequency multiplier and / or the second frequency multiplier can be an 8-fold frequency multiplier. Then, the first carrier specifying the terahertz frequency band, and / or the second carrier specifying the terahertz frequency band, can be a 100 GHz carrier.

[0119] In addition, to ensure the quality of the radio frequency signal input to the metasurface device, the signal transmission system may also include a first power amplifier and a second power amplifier.

[0120] The first frequency modulation device is specifically used to transmit the first radio frequency signal to the first power amplifier, and through the first power amplifier, output the amplified first radio frequency signal from the first direction to the metasurface device.

[0121] The second frequency modulation device is specifically used to transmit the second radio frequency signal to the second power amplifier, and through the second power amplifier, output the power-amplified second radio frequency signal from the second direction to the metasurface device.

[0122] Since the amplified first and second radio frequency signals need to be transmitted to the metasurface device, the signal transmission system may also include a first horn antenna and a second horn antenna. For example... Figure 2 As shown.

[0123] Figure 2 This is a schematic diagram of a signal transmission system provided in this specification. Figure 2 The signal transmission system includes a carrier generator, a first frequency multiplier, a first bandpass filter, a first mixer, a first power amplifier, a first horn antenna, a second frequency multiplier, a second bandpass filter, a second mixer, a second power amplifier, a second horn antenna, a signal source, a control chip, a first switch, a second switch, a first load, a second load, and metasurface devices.

[0124] Both the first and second switches are single-pole double-throw switches.

[0125] When the control chip controls the output of the first switch J1 terminal, it connects the output terminal J0 of the signal source with the J1 terminal of the first switch, thereby ensuring that the specified signal is transmitted to the first mixer. When the control chip controls the output of the first switch J2 terminal, it connects the J2 terminal of the first switch with the J0 terminal, thereby preventing the specified signal from being transmitted to the first mixer. The first load is used to receive the specified signal, preventing signal leakage and interference.

[0126] When the control chip controls the output of the second switch's J1 terminal, it connects the output terminal J0 of the signal source with the J1 terminal of the second switch, thereby ensuring that the specified signal is transmitted to the second mixer. When the control chip controls the output of the second switch's J2 terminal, it connects the J2 terminal of the second switch with the J0 terminal, thereby preventing the specified signal from being transmitted to the second mixer. This second load is used to receive the specified signal, preventing signal leakage and interference.

[0127] This instruction manual also provides Figure 3 The signal receiving system shown includes a signal separation device and a demodulation device. Wherein:

[0128] The signal separation device is used to receive dual-mode orbital angular momentum electromagnetic waves in the terahertz band and separate the dual-mode orbital angular momentum electromagnetic waves into a first received signal that propagates along a fourth direction and a second received signal that propagates along a fifth direction.

[0129] The demodulation device is used to demodulate the first received signal to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave, and to demodulate the second received signal to obtain the second information carried by the mode orbital angular momentum electromagnetic wave.

[0130] The first and second information are the information to be transmitted by the signal transmission system for modulating the carrier wave.

[0131] In one or more embodiments of this specification, the first information and the second information may specifically be as follows: Figure 1 The signal transmission system shown is used to modulate the carrier wave of the information to be transmitted. Of course, Figure 1 The signal transmission system shown is merely an example provided in this specification. The first and second information obtained by the demodulation of this signal receiving system can also be the information to be transmitted using other forms of signal transmission systems to modulate the carrier wave. The dual-mode orbital angular momentum electromagnetic wave in this terahertz band can also be... Figure 1 This manual does not restrict the acquisition of materials through other means.

[0132] Similarly, through Figure 1The signal transmission system shown emits dual-mode orbital angular momentum electromagnetic waves in the terahertz band, which can be transmitted via... Figure 3 The signal receiving system shown receives and demodulates the information to be transmitted; alternatively, the following method can also be used. Figure 3 Other signal receiving systems may receive and demodulate the information to be transmitted; this specification does not impose any restrictions on this.

[0133] based on Figure 3 The signal receiving system shown can receive dual-mode orbital angular momentum electromagnetic waves in the terahertz band and separate a first received signal propagating along a fourth direction and a second received signal propagating along a fifth direction. This allows for demodulation of the first and second information carried by the dual-mode orbital angular momentum electromagnetic waves. This enables the reception and demodulation of the dual-mode orbital angular momentum electromagnetic waves generated by the signal transmitting segment, thus achieving wireless communication.

[0134] In addition, in one or more embodiments of this specification, the signal separation device may include: a reconstruction board, a compensation board, and a lens.

[0135] This reconstruction plate is used to transform the dual-mode orbital angular momentum electromagnetic wave into a linear wave, thus obtaining the first linear wave.

[0136] Because the reconstruction plate introduces noise phase during the conversion of dual-mode orbital angular momentum electromagnetic waves into linear waves, it is necessary to eliminate the noise phase.

[0137] The compensation plate is used to receive the first linear wave obtained by the reconstruction plate and remove the noise phase of the first linear wave to obtain the second linear wave.

[0138] The lens is used to separate the first received signal transmitted along the fourth direction and the second received signal transmitted along the fifth direction based on the second linear wave.

[0139] Figure 4 This is a schematic diagram of a signal separation device provided in this specification. Figure 4 The reconstruction plate receives dual-mode orbital angular momentum electromagnetic waves. The distance between the reconstruction plate and the compensation plate is 50mm, and the compensation plate is in close contact with the lens. For ease of demonstration, Figure 4 Separate the compensation plate from the lens. The lens has a focal length of 300mm.

[0140] In one or more embodiments of this specification, the expression for the equivalent phase function φ2(x2,y2) of the reconstruction board is:

[0141]

[0142] In one or more embodiments of this specification, the expression for the equivalent phase function φ3(x2,y2) of the compensation plate is:

[0143]

[0144] Where a, b, and L are preset parameters, and L represents the distance between the reconstruction board and the compensation board. k is the carrier wave vector magnitude in the terahertz band. x2 and y2 represent the coordinates on the x and y axes of the coordinate system where the reconstruction plate and compensation plate are located.

[0145] In one or more embodiments of this specification, a = 9.70 mm, b = 14 mm, and L = 50 mm.

[0146] In one or more embodiments of this specification, the demodulation device may include a first downconversion module, a second downconversion module, a third power amplifier, and a fourth power amplifier.

[0147] The first down-conversion module is used to receive a first received signal, reduce the frequency band of the first received signal from the terahertz band to a specified frequency band to obtain a first frequency-converted signal, and input the first frequency-converted signal into the third power amplifier.

[0148] The third power amplifier is used to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave based on the first frequency conversion signal.

[0149] The second down-conversion module is used to receive the second received signal and reduce the frequency band of the second received signal from the terahertz band to the specified frequency band to obtain the second frequency-converted signal.

[0150] The fourth power amplifier is used to obtain the second information carried by the dual-mode orbital angular momentum electromagnetic wave based on the second frequency conversion signal.

[0151] In one or more embodiments of this specification, the signal receiving system may further include a display. The display is used to show first information and second information.

[0152] In one or more embodiments of this specification, the signal receiving system may further include: an offline digital signal processing device for performing digital signal processing on the first information and the second information.

[0153] Since the demodulation device needs to receive both the first and second received signals, it may include a third and a fourth horn antenna.

[0154] Figure 5 This is a schematic diagram of a demodulation device provided in this specification. Figure 5As shown, the demodulation device receives a first received signal through a third horn antenna. This first received signal is input to a first down-conversion module to obtain a first converted signal. The first converted signal is then input to a third power amplifier to obtain the first information output by the third power amplifier. The demodulation device also receives a second received signal through a fourth horn antenna. This second received signal is input to a second down-conversion module to obtain a second converted signal. The second converted signal is then input to a fourth power amplifier to obtain the second information output by the fourth power amplifier. The first and second information can be displayed on a screen. Further digital signal processing can then be performed using an offline digital signal processing device.

[0155] This specification also provides a signal transmission method, such as Figure 6 As shown.

[0156] Figure 6 This is a flowchart illustrating a signal transmission method described in this specification, which is executed by a control chip. The method specifically includes the following steps:

[0157] S100: Obtain the information to be transmitted.

[0158] S102: Control whether to transmit the specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received.

[0159] The useful signal is used to enable a first frequency modulation device to modulate a carrier wave received by itself based on a useful signal determined by the first frequency modulation device, thereby obtaining a first radio frequency signal in the terahertz band, and to output the first radio frequency signal to the metasurface device from a first direction. It also enables a second frequency modulation device to modulate a carrier wave received by itself based on a useful signal determined by the second frequency modulation device, thereby obtaining a second radio frequency signal in the terahertz band, and to output the second radio frequency signal to the metasurface device from a second direction. The first and second radio frequency signals are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave propagating coaxially along a third direction.

[0160] based on Figure 6The method shown enables the control chip to transmit a specified signal generated by the signal source to the first and second frequency modulation devices. The first and second frequency modulation devices can determine their own useful signals corresponding to the information to be transmitted based on whether they have received the specified signal. They then modulate carrier waves according to their useful signals to obtain a first radio frequency signal and a second radio frequency signal in the terahertz band, respectively. These signals are then used to generate and transmit coaxially transmitted dual-mode orbital angular momentum electromagnetic waves through metasurface devices, thereby achieving the transmission of the information to be transmitted. This method generates and transmits coaxially transmitted dual-mode orbital angular momentum electromagnetic waves in the terahertz band, enabling the transmission of the information to be transmitted to the signal receiving end.

[0161] Figure 7 This is a schematic diagram of a signal transmitting device provided in this specification. The signal transmitting device is used in a control chip, and the device includes:

[0162] The acquisition module 200 is used to acquire the information to be transmitted.

[0163] The modulation and transmission module 201 is used to control whether to transmit a designated signal generated by a signal source to a first frequency modulation device and a second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the designated signal is received; wherein, the useful signal is used to enable the first frequency modulation device to modulate the carrier received by the first frequency modulation device according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz frequency band, and output the first radio frequency signal to the metasurface device from a first direction, and to enable the second frequency modulation device to modulate the carrier received by the second frequency modulation device according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and output the second radio frequency signal to the metasurface device from a second direction; the first radio frequency signal and the second radio frequency signal are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave coaxially propagating along a third direction.

[0164] This specification also provides a computer-readable storage medium storing a computer program that can be used to execute the above-described signal transmission method.

[0165] This instruction manual also provides Figure 8 The diagram shows a schematic structural representation of the electronic device. Figure 8At the hardware level, the electronic device includes a processor, an internal bus, a network interface, memory, and non-volatile memory, and may also include other hardware required for the business operations. The processor reads the corresponding computer program from the non-volatile memory into memory and then runs it to implement the above signal transmission method. Of course, in addition to software implementation, this specification does not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution subject of the following processing flow is not limited to individual logic units, but can also be hardware or logic devices.

[0166] In the 1990s, improvements to a technology could be clearly distinguished as either hardware improvements (e.g., improvements to the circuit structure of diodes, transistors, switches, etc.) or software improvements (improvements to the methodology). However, with technological advancements, many methodological improvements today can be considered direct improvements to the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved methodology into the hardware circuit. Therefore, it cannot be said that a methodological improvement cannot be implemented using hardware physical modules. For example, a Programmable Logic Device (PLD) (such as a Field Programmable Gate Array (FPGA)) is such an integrated circuit whose logic function is determined by the user programming the device. Designers can program and "integrate" a digital system onto a PLD themselves, without needing chip manufacturers to design and manufacture dedicated integrated circuit chips. Furthermore, nowadays, instead of manually manufacturing integrated circuit chips, this programming is mostly implemented using "logic compiler" software. Similar to the software compiler used in program development, the original code before compilation must be written in a specific programming language, called a Hardware Description Language (HDL). There are many HDLs, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, and RHDL (Ruby Hardware Description Language). Currently, the most commonly used are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should understand that by simply performing some logic programming on the method flow using one of these hardware description languages ​​and programming it into an integrated circuit, the hardware circuit implementing the logical method flow can be easily obtained.

[0167] The controller can be implemented in any suitable manner. For example, it can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers. Examples of controllers include, but are not limited to, the following microcontrollers: ARC625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicon Labs C8051F320. A memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also recognize that, in addition to implementing the controller in purely computer-readable program code form, the same functionality can be achieved by logically programming the method steps to make the controller take the form of logic gates, switches, ASICs, programmable logic controllers, and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the means included therein for implementing various functions can also be considered as structures within the hardware component. Alternatively, the means for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0168] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0169] For ease of description, the above devices are described in terms of function, divided into various units. Of course, in implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware components.

[0170] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0171] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0172] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0173] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0174] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0175] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0176] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0177] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0178] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, this specification may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this specification may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0179] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0180] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0181] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this specification.

Claims

1. A signal transmission system, characterized in that, The system includes: a signal source, a carrier generator, a first frequency modulation device, a second frequency modulation device, a control chip, and metasurface devices; wherein: The signal source is used to generate the specified signal; The control chip is used to control whether to transmit the specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted according to whether the specified signal is received; The carrier generator is used to generate a carrier and transmit the carrier to the first frequency modulation device and the second frequency modulation device; The first frequency modulation device is used to modulate the carrier received by the first frequency modulation device itself according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz frequency band, and output the first radio frequency signal to the metasurface device from a first direction. The second frequency modulation device is used to modulate the carrier received by the second frequency modulation device itself according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and output the second radio frequency signal to the metasurface device from the second direction; The metasurface device is used to output a dual-mode orbital angular momentum electromagnetic wave that propagates coaxially along a third direction based on the first radio frequency signal and the second radio frequency signal.

2. The system as described in claim 1, characterized in that, The first frequency modulation device includes at least: a first frequency multiplier and a first frequency mixer; The first frequency multiplier is used to tune the carrier frequency to the terahertz band and send it to the first mixer; The first mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the first mixer itself based on the useful signal determined by the first mixer itself, so as to obtain a first radio frequency signal in the terahertz band.

3. The system as described in claim 2, characterized in that, The first frequency modulation device further includes: a first bandpass filter; The first frequency multiplier is specifically used to modulate the carrier frequency to obtain a terahertz wave, and send the terahertz wave to the first bandpass filter; The first bandpass filter is specifically used to receive the terahertz wave sent by the first frequency multiplier, filter the received terahertz wave to obtain the carrier of the first specified terahertz frequency band, and send it to the first mixer.

4. The system as described in claim 1, characterized in that, The second frequency modulation device includes at least: a second frequency multiplier and a second frequency mixer; The second frequency multiplier is used to tune the carrier frequency to the terahertz band and send it to the second mixer; The second mixer is used to determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received, and to modulate the carrier of the terahertz band received by the second mixer itself based on the useful signal determined by the second mixer itself, so as to obtain a second radio frequency signal in the terahertz band.

5. The system as described in claim 4, characterized in that, The second frequency modulation device further includes: a second bandpass filter; The second frequency multiplier is specifically used to modulate the carrier frequency to obtain a terahertz wave, and send the terahertz wave to the second bandpass filter; The second bandpass filter is specifically used to receive the terahertz wave sent by the second frequency multiplier, filter the received terahertz wave to obtain the carrier of the second specified terahertz frequency band, and send it to the second mixer.

6. The system as described in claim 1, characterized in that, The signal transmitting system also includes a first power amplifier and a second power amplifier; The first frequency modulation device is specifically used to transmit the first radio frequency signal to the first power amplifier, and through the first power amplifier, output the power-amplified first radio frequency signal to the metasurface device from the first direction; The second frequency modulation device is specifically used to transmit the second radio frequency signal to the second power amplifier, and through the second power amplifier, output the power-amplified second radio frequency signal from the second direction to the metasurface device.

7. The system as described in claim 1, characterized in that, The control chip is a microcontroller.

8. A signal receiving system, characterized in that, The system includes: a signal separation device and a demodulation device; wherein: The signal separation device is used to receive dual-mode orbital angular momentum electromagnetic waves in the terahertz band and separate the dual-mode orbital angular momentum electromagnetic waves into a first received signal transmitted along the fourth direction and a second received signal transmitted along the fifth direction. The demodulation device is used to demodulate the first received signal to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave, and to demodulate the second received signal to obtain the second information carried by the dual-mode orbital angular momentum electromagnetic wave. The first information and the second information are the information to be transmitted by the signal transmission system for modulating the carrier wave.

9. The system as described in claim 8, characterized in that, The signal separation device includes: a reconstruction board, a compensation board, and a lens; The reconstruction plate is used to transform the dual-mode orbital angular momentum electromagnetic wave into a linear wave to obtain a first linear wave. The compensation plate is used to receive the first linear wave obtained by the reconstruction plate and remove the noise phase of the first linear wave to obtain the second linear wave. The lens is used to separate a first received signal transmitted along a fourth direction and a second received signal transmitted along a fifth direction based on the second linear wave.

10. The system as described in claim 9, characterized in that, The demodulation device includes a first down-conversion module, a second down-conversion module, a third power amplifier, and a fourth power amplifier; The first down-conversion module is used to receive the first received signal, reduce the frequency band of the first received signal from the terahertz band to a specified frequency band to obtain the first frequency-converted signal, and input the first frequency-converted signal into the third power amplifier; The third power amplifier is used to obtain the first information carried by the dual-mode orbital angular momentum electromagnetic wave based on the first frequency conversion signal. The second down-conversion module is used to receive the second received signal, reduce the frequency band of the second received signal from the terahertz band to the specified frequency band to obtain the second frequency-converted signal, and input the second frequency-converted signal into the fourth power amplifier; The fourth power amplifier is used to obtain the second information carried by the dual-mode orbital angular momentum electromagnetic wave based on the second frequency conversion signal.

11. The system as described in claim 8, characterized in that, The signal receiving system further includes: a display; The display is used to show the first information and the second information.

12. A signal transmission method, characterized in that, Applied to a control chip, the method includes: Obtain the information to be transmitted; The system controls whether to transmit a specified signal generated by the signal source to the first frequency modulation device and the second frequency modulation device based on the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the specified signal is received. The useful signal is used to enable the first frequency modulation device to modulate the carrier received by the first frequency modulation device according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz band, and to output the first radio frequency signal to the metasurface device from a first direction; and to enable the second frequency modulation device to modulate the carrier received by the second frequency modulation device according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz band, and to output the second radio frequency signal to the metasurface device from a second direction; the first radio frequency signal and the second radio frequency signal are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave that propagates coaxially along a third direction.

13. A signal transmitting device, characterized in that, The device, used in a control chip, includes: The acquisition module is used to acquire the information to be transmitted. A modulation and transmission module is used to control whether to transmit a designated signal generated by a signal source to a first frequency modulation device and a second frequency modulation device according to the information to be transmitted, so that the first frequency modulation device and the second frequency modulation device determine the useful signal corresponding to the information to be transmitted based on whether the designated signal is received; wherein, the useful signal is used to enable the first frequency modulation device to modulate the carrier received by the first frequency modulation device according to the useful signal determined by the first frequency modulation device itself, to obtain a first radio frequency signal in the terahertz frequency band, and to output the first radio frequency signal to the metasurface device from a first direction; and to enable the second frequency modulation device to modulate the carrier received by the second frequency modulation device according to the useful signal determined by the second frequency modulation device itself, to obtain a second radio frequency signal in the terahertz frequency band, and to output the second radio frequency signal to the metasurface device from a second direction; the first radio frequency signal and the second radio frequency signal are used to enable the metasurface device to output a dual-mode orbital angular momentum electromagnetic wave coaxially propagating along a third direction.

14. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the signal transmission method described in claim 12.

15. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the signal transmission method of claim 12.

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