CN113285240A - Data transmission device and 60GHz millimeter wave full-duplex rotary data transmission system - Google Patents
Data transmission device and 60GHz millimeter wave full-duplex rotary data transmission system Download PDFInfo
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- CN113285240A CN113285240A CN202110559278.2A CN202110559278A CN113285240A CN 113285240 A CN113285240 A CN 113285240A CN 202110559278 A CN202110559278 A CN 202110559278A CN 113285240 A CN113285240 A CN 113285240A
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- data transmission
- millimeter wave
- duplex
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/0241—Waveguide horns radiating a circularly polarised wave
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
- H01Q9/065—Microstrip dipole antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transceivers (AREA)
Abstract
The invention provides a data transmission device and a 60GHz millimeter wave full-duplex rotary data transmission system, wherein the 60GHz millimeter wave full-duplex rotary data transmission system comprises two data transmission modules, each data transmission module comprises a 60GHz millimeter wave transceiver (such as an ST60A2 chip) and the data transmission device, one 60GHz millimeter wave transceiver is connected with one first dipole unit, and the other 60GHz millimeter wave transceiver is connected with the other first dipole unit. The invention has the beneficial effects that: the invention forms a 60GHz millimeter wave full-duplex rotary data transmission system by matching the data transmission device with the 60GHz millimeter wave transceiver, realizes high-speed full-duplex data transmission of 60GHz millimeter waves during rotation, and obtains very good technical effect.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a data transmission device and a 60GHz millimeter wave full-duplex rotary data transmission system.
Background
In recent years, governments have divided the spectrum resources available for continuous unlicensed use around the 60GHz frequency. For example, the U.S. divides the unlicensed frequency range into 7GHz (57GHz-64GHz), Japan also divides it into 7GHz (59.4GHz-62.9GHz), and Europe is more up to 9GHz (57GHz-66 GHz). The method mainly has the following characteristics:
strong anti-interference
The directivity of the 60GHz wireless signal is strong, so that the mutual interference between the 60GHz communication signals in several different directions is very small and can be almost ignored. The technology of wireless communication using the frequency band is few, and the carrier frequency of the mainly used wireless communication technology is basically far less than 60GHz, so that the interference between communication systems is also small and can be ignored.
High safety
The free space loss of the transmission path is about 15dB/km at a frequency around 60GHz, and. Air, moisture, walls and other obstacles attenuate the millimeter waves very much. The 60GHz wireless communication has the advantages of unique safety performance and anti-interference performance in short-distance communication, and is beneficial to short-distance point-to-point communication.
The millimeter wave transceiver used at present is an ST60A2 millimeter wave transceiver, ST60A2 is a chip of a semiconductor of law intention, SERDES signals within 6Gbps rate can be modulated into 60GHz millimeter waves, and point-to-point short-distance transmission is realized. Since 60GHz millimeter waves pass through plastic with little attenuation, non-contact wireless connection can be realized.
SERDES is an acronym for SERializer/DESerializer. It is a mainstream Time Division Multiplexing (TDM), point-to-point (P2P) serial communication technology.
Although the chip ST60a2 exists, the data transmission device matching with the chip ST60a2 is lacked, and the high-speed full-duplex data transmission of 60GHz millimeter wave under rotation cannot be realized, which troubles users and needs to be solved.
Disclosure of Invention
In order to solve the problem that the high-speed full-duplex data transmission of 60GHz millimeter waves can not be realized under the condition of rotation in the prior art, the invention provides a data transmission device matched with a 60GHz millimeter wave transceiver.
The invention provides a data transmission device, which comprises a same-frequency full-duplex rotating antenna, wherein the same-frequency full-duplex rotating antenna comprises a polarization grid, left-hand/right-hand circularly polarized electromagnetic waves are generated by the polarization grid, the same-frequency full-duplex rotating antenna is a left-hand polarization and right-hand polarization integrated antenna, and the phases of the left-hand circularly polarized electromagnetic waves and the right-hand circularly polarized electromagnetic waves are orthogonal.
As a further improvement of the invention, the co-frequency full-duplex rotating antenna comprises an antenna wall, a rectangular waveguide and a circular waveguide horn, wherein the rectangular waveguide and a polarization grid are positioned in the antenna wall, the circular waveguide horn is positioned on one side of the antenna wall, the rectangular waveguide is connected with the polarization grid, and left-handed/right-handed circularly polarized electromagnetic waves generated by the polarization grid are emitted into the air through the circular waveguide horn.
As a further improvement of the present invention, the polarization grating is irregularly shaped.
As a further improvement of the present invention, the same-frequency full-duplex rotary antenna is provided with a mounting groove, and the PCB adapter module is mounted in the mounting groove.
As a further improvement of the present invention, the data transmission device further comprises a PCB adapter module, and the PCB adapter module is connected to the same-frequency full-duplex rotating antenna.
As a further improvement of the present invention, the PCB adapter module includes a PCB and two folded dipole units, the PCB is connected to the folded dipole units, and the two folded dipole units are connected to the rectangular waveguide.
As a further improvement of the present invention, the folded dipole unit includes a first dipole unit and a second dipole unit, the first dipole unit is located on the top layer of the PCB, the second dipole unit is located on the second layer of the PCB, the second dipole unit is connected to a signal ground, the first dipole unit and the second dipole unit are in a symmetrical structure, and the first dipole unit is connected to the rectangular waveguide.
As a further improvement of the present invention, the folded dipole unit is inserted into a cavity of the co-frequency full-duplex rotating antenna, and the PCB adapting module is further provided with a grounding hole.
The invention also provides a 60GHz millimeter wave full-duplex rotary data transmission system which comprises a data transmission module and two 60GHz millimeter wave transceivers, wherein the data transmission module comprises two 60GHz millimeter wave transceivers, one 60GHz millimeter wave transceiver is connected with one first dipole unit, and the other 60GHz millimeter wave transceiver is connected with the other first dipole unit.
As a further improvement of the invention, one 60GHz millimeter wave transceiver is connected with one first dipole unit through a microstrip line, and the other 60GHz millimeter wave transceiver is connected with the other first dipole unit through the microstrip line.
As a further improvement of the invention, the number of the data transmission modules is two, and the data transmission is completed through the two data transmission modules.
As a further improvement of the invention, the 60GHz millimeter wave transceiver is an ST60A2 chip.
The invention has the beneficial effects that: the data transmission device is matched with the 60GHz millimeter wave transceiver to form a 60GHz millimeter wave full-duplex rotary data transmission system, high-speed full-duplex data transmission of the 60GHz millimeter wave under the rotation condition is realized, and a very good technical effect is achieved.
Drawings
FIG. 1 is a schematic diagram of an antenna configuration;
FIG. 2 is a cross-sectional view of the antenna;
FIG. 3 is a schematic structural diagram of a PCB patching module;
FIG. 4 is a schematic diagram of a data transmission apparatus;
FIG. 5 is a schematic block diagram of a 60GHz millimeter wave full-duplex rotating data transmission system;
FIG. 6 is a schematic diagram of the 60GHz millimeter wave full-duplex rotating data transmission principle;
FIG. 7 is a schematic diagram of the operation of a 60GHz millimeter wave full-duplex rotating data transmission system;
fig. 8 is a schematic diagram of the present invention applied to a gigabit ethernet network;
FIG. 9 is a schematic view of an antenna to show its shape;
fig. 10 is a schematic view of the inside of the antenna.
Detailed Description
As shown in fig. 4, the present invention discloses a data transmission device, which includes a PCB switch module 100 and a same-frequency full-duplex rotating antenna 200, wherein the PCB switch module 100 is connected to the same-frequency full-duplex rotating antenna 200, the same-frequency full-duplex rotating antenna 200 includes a polarization grid 203, the polarization grid 203 generates left-handed/right-handed circularly polarized electromagnetic waves, the same-frequency full-duplex rotating antenna 200 is an integrated antenna with left-handed polarization and right-handed polarization, and the phases of the left-handed circularly polarized electromagnetic waves and the right-handed circularly polarized electromagnetic waves are orthogonal.
The same-frequency full-duplex rotating antenna 200 solves the problem of full-duplex rotating transmission under the same-frequency condition.
As shown in fig. 1 and 2, the co-frequency full-duplex rotating antenna 200 further includes an antenna wall 201, a rectangular waveguide 202, and a circular waveguide horn 204, wherein the rectangular waveguide 202 and the polarization grating 203 are located in the antenna wall 201, the circular waveguide horn 204 is located on one side of the antenna wall 201, the rectangular waveguide 202 is connected to the polarization grating 203, and the left-handed/right-handed circularly polarized electromagnetic wave generated by the polarization grating 203 is emitted into the air through the circular waveguide horn 204.
The same-frequency full-duplex rotary antenna 200 is provided with a mounting groove 205, and the PCB adapter module 100 is mounted in the mounting groove 205.
The polarization grating 203 is in a random shape, and the random-shaped polarization grating 203 is derived by a software optimization algorithm, so that high-isolation polarization can be realized.
As shown in fig. 3, the PCB adapter module 100 includes a PCB and two folded dipole units 101, where the folded dipole unit 101 includes a first dipole unit 102 and a second dipole unit 103, the first dipole unit 102 is located on a top layer of the PCB, the second dipole unit 103 is located on a second layer of the PCB, the second dipole unit 103 is connected to a signal ground, the first dipole unit 102 and the second dipole unit 103 are symmetric, the number of the folded dipole units 101 is two, and the two first dipole units 102 are connected to a rectangular waveguide 202.
The folded dipole element 101 is inserted into the cavity of the co-frequency full-duplex rotating antenna 200.
The PCB patching module 100 is further provided with a grounding hole 104.
As shown in fig. 5, the present invention further discloses a 60GHz millimeter wave full-duplex rotary data transmission system, which includes a data transmission module, where the data transmission module includes two 60GHz millimeter wave transceivers and the data transmission device of the present invention, one 60GHz millimeter wave transceiver is connected to one first dipole unit 102, and the other 60GHz millimeter wave transceiver is connected to the other first dipole unit 102.
As a preferred embodiment of the present invention, the 60GHz millimeter wave transceiver employs the ST60a2 chip 20.
Preferably, one ST60a2 chip 20 is connected to one first dipole element 102 via microstrip line 10, and the other ST60a2 chip 20 is connected to the other first dipole element 102 via microstrip line 10.
The number of the data transmission modules is two, and data transmission is completed through the two data transmission modules.
As shown in fig. 5, the number of the ST60a2 chips 20 is four, namely, the first ST60a2 chip 21, the second ST60a2 chip 22, the third ST60a2 chip 23 and the fourth ST60a2 chip 24, and when the first ST60a2 chip 21 on the left side is a transmitting end, the third ST60a2 chip 23 on the right side receives a signal transmitted by the chip and recovers the signal. Similarly, when the fourth ST60a2 chip 24 on the right side is the transmitting side, the second ST60a2 chip 22 on the left side will receive the signal transmitted by it and recover it. And completing full-duplex high-speed communication.
The technical challenge of the present invention is the design of the PCB switch module 100 and the co-frequency full-duplex rotating antenna 200, which can meet the requirement of high-speed full-duplex rotation. Because the full-duplex rotation needs to be supported, a left circular polarization scheme and a right circular polarization scheme need to be adopted, signals need to be transmitted and received in a coaxial direction, if the transmitting and receiving antennas are not coaxial, the rotation causes the antennas on two sides to be inaccurate, and a large amount of error codes are generated due to the change of the strength of the signals. The design of the coaxial antenna brings isolation design challenges, and the insufficient isolation can cause the interference of signal receiving and transmitting on the same side and the communication can not be realized, so the invention adopts the improved novel folded dipole unit 101, the rectangular waveguide 202 and the circular waveguide horn 204 to optimally design the polarization grating 203, thereby solving the difficulties at one stroke and realizing the isolation of more than 30dB in the bandwidth of 5 GHz.
Miniaturization and low cost are another major bright point of the invention, and contribute to the mass production of products.
As shown in fig. 6, the left side SERDES TX transmitting signal is modulated into a 60GHz carrier signal by passing through ST60a2 chip 20, and is transmitted into the air after being left-hand polarized by an antenna, and meanwhile, the left-hand polarized antenna on the opposite side receives the air signal and demodulates the air signal to restore the SERDES signal, thereby completing one-way transmission.
Similarly, the SERDES TX on the right side is transmitted through the ST60A2 chip 20, modulated into a 60GHz carrier signal, transmitted into the air after being right-handed polarized through an antenna, and simultaneously demodulated after the right-handed polarized antenna on the opposite side receives the air signal and restored into an SERDES signal. The full duplex communication is completed by the butt joint according to the figure 6.
In fig. 6, TX denotes a transmitter and RX denotes a receiver.
Because the left and right-handed polarization phases are orthogonal, the two polarization phases do not interfere with each other even if the two polarization phases work at the same frequency. In fact, the center frequency of the ST60a2 chip 20 is 60.4GHz, and the chip has only one working frequency, which is also the reason for using two polarization modes. Meanwhile, the left-handed polarization and the right-handed polarization belong to circular polarization and are suitable for rotary application. When the two antennas are aligned and rotated along the microwave axial direction, stable signals can be received by both sides because the signal centers of both sides are on the axial line.
The same-frequency full-duplex rotary antenna 200 of the present invention has the following characteristics:
1. the left and right-handed polarization phases are orthogonal and do not interfere with each other; meanwhile, the left-handed polarization and the right-handed polarization belong to circular polarization and are suitable for rotary application.
2. And the left and right-handed polarization integrated antennas have signals on the same axis, and the signals on two sides can be stably connected in the coaxial rotation of the antennas on two sides.
3. The co-frequency full-duplex rotary antenna 200 is optimally designed together with the PCB adapter module 100, and has the characteristics of high isolation, low coupling, high bandwidth and high gain.
4. The polarization grid 203 with optimized design realizes high isolation polarization.
As shown in fig. 7, the working principle of the 60GHz millimeter wave full-duplex rotary data transmission system of the present invention is as follows: the ST60a2 chip 20 transmits the modulated 60GHz carrier signal to the folded dipole unit 101 through the microstrip line 10, the folded dipole unit 101 excites the TE10 working mode of the rectangular waveguide 202, so as to transmit the 60GHz carrier signal to the rectangular waveguide 202, the TE10 mode of the rectangular waveguide 202 generates left/right circularly polarized electromagnetic waves in the square waveguide after passing through the polarization grating 203, and the left/right circularly polarized electromagnetic waves are transmitted into the air through the circular waveguide horn 204, so that the data transmission module on the left side (end a) completes data transmission, and the data transmission module on the right side (end B) demodulates and reduces the received 60GHz carrier signal in the same polarization mode in the air into a SERDES signal, thereby completing one-way transmission. Similarly, the data transmission module on the right side (end B) can also transmit data, and the data transmission module on the left side (end a) receives and demodulates data to complete data reception. Because the left data transmission module and the right data transmission module (the end A and the end B) have high isolation, circularly polarized electromagnetic waves with opposite rotation directions are received and transmitted, and two ports on the same side do not interfere with each other during receiving and transmitting, the full-duplex communication of the two data transmission modules can be realized.
A typical application of the invention is to replace a mechanical slip ring, and realize the function of the mechanical slip ring in a wireless mode. The method is also a global first millimeter wave high-speed full-duplex rotating data transmission scheme and can be used for replacing the traditional mechanical slip ring.
In the following, the gigabit network slip ring is exemplified, and the gigabit network slip ring has 4 twisted pairs, and the operating frequency of a single twisted pair can reach 250 MHz. The higher the operating frequency, the higher the impedance characteristics required of the transmission line. The mechanical slip ring is difficult to match with the network cable in impedance due to the structural characteristics of the mechanical slip ring, so that the signal is lost. Furthermore, mechanical slip rings wear, oxidize and corrode, which can even lead to communication interruption. The invention can realize the non-contact type application of rotating gigabit Ethernet by matching with an Ethernet transceiver, as shown in figure 8, the connection of gigabit network cables can be realized by placing the same device on the opposite side, the invention changes the physical connection of the network cables into millimeter wave signal connection, and the problem of abrasion and corrosion can be solved. Because the millimeter wave can penetrate through the plastic, the electronic material can be wrapped in the plastic closed box, and the plastic closed box is waterproof, dustproof and anticorrosive. In addition, the actual test working speed of the SGMII interface can reach more than 3Gpbs, and the SGMII interface can be compatible with 2.5G Ethernet.
The invention forms a 60GHz millimeter wave full-duplex rotary data transmission system by matching the data transmission device with a 60GHz millimeter wave transceiver (for example, by adopting an ST60A2 chip 20), realizes high-speed full-duplex data transmission of 60GHz millimeter waves under the rotation condition, and obtains very good technical effect.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. A data transmission apparatus, characterized by: the same-frequency full-duplex rotating antenna comprises a polarization grid, left-hand/right-hand circularly polarized electromagnetic waves are generated by the polarization grid, the same-frequency full-duplex rotating antenna is a left-hand polarization and right-hand polarization integrated antenna, and the left-hand circularly polarized electromagnetic waves and the right-hand circularly polarized electromagnetic waves are orthogonal in phase.
2. The data transmission apparatus according to claim 1, wherein: the co-frequency full-duplex rotating antenna comprises an antenna wall, a rectangular waveguide and a circular waveguide horn, wherein the rectangular waveguide and a polarization grid are located in the antenna wall, the circular waveguide horn is located on one side of the antenna wall, the rectangular waveguide is connected with the polarization grid, and left-handed/right-handed circularly polarized electromagnetic waves generated by the polarization grid are transmitted to the air through the circular waveguide horn.
3. The data transmission apparatus according to claim 2, wherein: the polarization grid is irregular in shape.
4. The data transmission apparatus according to claim 1, wherein: the same-frequency full-duplex rotating antenna is provided with a mounting groove, and the PCB switching module is mounted in the mounting groove.
5. The data transmission apparatus according to any one of claims 1 to 4, wherein: the data transmission device also comprises a PCB switching module, and the PCB switching module is connected with the co-frequency full-duplex rotating antenna.
6. The data transmission apparatus according to claim 5, wherein: the PCB switching module comprises a PCB and two folding dipole units, wherein the PCB is connected with the folding dipole units, and the two folding dipole units are connected with the rectangular waveguide.
7. The data transmission apparatus according to claim 6, wherein: the folded dipole unit comprises a first dipole unit and a second dipole unit, the first dipole unit is located on the top layer of the PCB, the second dipole unit is located on the second layer of the PCB, the second dipole unit is connected with a signal ground, the first dipole unit and the second dipole unit are in a symmetrical structure, and the first dipole unit is connected with the rectangular waveguide.
8. The data transmission apparatus according to claim 6, wherein: the folding dipole unit is inserted into the cavity of the co-frequency full-duplex rotating antenna, and the PCB switching module is further provided with a grounding hole.
9. The utility model provides a 60GHz millimeter wave full duplex rotation data transmission system which characterized in that: comprising a data transmission module comprising two 60GHz millimeter wave transceivers, one 60GHz millimeter wave transceiver being connected to one first dipole element and the other 60GHz millimeter wave transceiver being connected to the other first dipole element, and a data transmission device according to any one of claims 7 to 8.
10. The 60GHz millimeter wave full-duplex rotary data transmission system of claim 9, wherein: one 60GHz millimeter wave transceiver is connected with one first dipole unit through a microstrip line, and the other 60GHz millimeter wave transceiver is connected with the other first dipole unit through the microstrip line.
11. The 60GHz millimeter wave full-duplex rotary data transmission system of claim 9 or 10, wherein: the number of the data transmission modules is two, and data transmission is completed through the two data transmission modules.
12. The 60GHz millimeter wave full-duplex rotary data transmission system of claim 9 or 10, wherein: the 60GHz millimeter wave transceiver is an ST60A2 chip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559278.2A CN113285240A (en) | 2021-05-21 | 2021-05-21 | Data transmission device and 60GHz millimeter wave full-duplex rotary data transmission system |
| PCT/CN2021/120693 WO2022242004A1 (en) | 2021-05-21 | 2021-09-26 | Data transmission device and 60 ghz millimeter-wave full-duplex rotary data transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110559278.2A CN113285240A (en) | 2021-05-21 | 2021-05-21 | Data transmission device and 60GHz millimeter wave full-duplex rotary data transmission system |
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| CN113285240A true CN113285240A (en) | 2021-08-20 |
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| CN202110559278.2A Pending CN113285240A (en) | 2021-05-21 | 2021-05-21 | Data transmission device and 60GHz millimeter wave full-duplex rotary data transmission system |
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| WO (1) | WO2022242004A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022242004A1 (en) * | 2021-05-21 | 2022-11-24 | 深圳市稳联科技有限公司 | Data transmission device and 60 ghz millimeter-wave full-duplex rotary data transmission system |
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2021
- 2021-05-21 CN CN202110559278.2A patent/CN113285240A/en active Pending
- 2021-09-26 WO PCT/CN2021/120693 patent/WO2022242004A1/en active Application Filing
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| WO2022242004A1 (en) * | 2021-05-21 | 2022-11-24 | 深圳市稳联科技有限公司 | Data transmission device and 60 ghz millimeter-wave full-duplex rotary data transmission system |
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| WO2022242004A1 (en) | 2022-11-24 |
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Application publication date: 20210820 |
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