Millimeter wave dual circular polarization bidirectional data transmission module and device

Abstract

The present invention provides a millimeter wave dual circular polarization bidirectional data transmission module and device, including a millimeter wave modem transceiver, a substrate integrated waveguide 90 degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode synthetic waveguide circular polarization radiator; the substrate integrated waveguide 90 degree bridge is connected to the millimeter wave modem transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90 degree bridge, and the orthogonal mode synthetic waveguide circular polarization radiator is connected to the orthogonal half-mode waveguide excitation slot. The present invention achieves a higher directional gain by integrating the millimeter wave modem transceiver, the substrate integrated waveguide 90 degree bridge, the orthogonal half-mode waveguide excitation slot and the orthogonal mode synthetic waveguide circular polarization radiator on a circuit board, and realizes short-range ultra-high-speed wireless digital signal bidirectional transmission through a smaller circuit size.

Description

Technical Field

[0001] The present invention relates to the technical field of millimeter wave short-range digital transmission, and in particular to a millimeter wave dual circular polarization bidirectional data transmission module and a device. Background Art

[0002] Wireless broadband digital communication technology has a wide range of applications in industrial applications and daily life. The development of the Internet has given rise to numerous data services, and the demand for broadband wireless data transmission has also grown exponentially. Traditional wireless transmission technologies, such as Bluetooth, WiFi, Zigbee, etc., have brought great convenience to daily life, but these technologies have narrow bandwidths and are difficult to meet some emerging broadband high-speed data transmission services, such as high-definition video streaming applications up to several Gbps. At the same time, these traditional technologies have low frequency bands and long wavelengths, making them difficult to deploy and transmit in some small spaces. Summary of the invention

[0003] The purpose of the present invention is to provide a millimeter wave dual circular polarization bidirectional data transmission module and device, which integrates the millimeter wave transceiver circuit with the dual circular polarization antenna to solve the problem of signal polarization alignment and stable transmission in a small space.

[0004] First aspect: The present application provides a millimeter-wave dual circularly polarized bidirectional data transmission module, comprising a millimeter-wave modem transceiver, a substrate integrated waveguide 90-degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode synthetic waveguide circularly polarized radiator; the substrate integrated waveguide 90-degree bridge is connected to the millimeter-wave modem transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90-degree bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected to the orthogonal half-mode waveguide excitation slot.

[0005] In an optional implementation of the first aspect, the millimeter wave modem transceiver also includes a transmitting circuit and a receiving circuit, the transmitting circuit is used to modulate the high-speed baseband digital signal into a millimeter wave digital signal and transmit it to the substrate integrated waveguide 90 degree bridge, and the receiving circuit is used to receive the millimeter wave digital signal output by the substrate integrated waveguide 90 degree bridge and demodulate it into a high-speed baseband digital signal.

[0006] In a second aspect, the present invention provides a millimeter-wave dual circularly polarized bidirectional data transmission device, comprising a millimeter-wave modem transceiver, a substrate integrated waveguide 90-degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode synthetic waveguide circularly polarized radiator, which are sequentially established on a circuit board; the substrate integrated waveguide 90-degree bridge is connected to the millimeter-wave modem transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90-degree bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected to the orthogonal half-mode waveguide excitation slot.

[0007] In an optional implementation of the second aspect, the millimeter wave modem transceiver also includes a transmitting circuit and a receiving circuit, the transmitting circuit is used to modulate the high-speed baseband digital signal into a millimeter wave digital signal and transmit it to the substrate integrated waveguide 90 degree bridge, and the receiving circuit is used to receive the millimeter wave digital signal output by the substrate integrated waveguide 90 degree bridge and demodulate it into a high-speed baseband digital signal.

[0008] In an optional implementation of the second aspect, the substrate integrated waveguide 90 degree bridge includes upper and lower layers of metal, a high-frequency dielectric plate, and metallized through holes, the upper and lower layers of metal cover both sides of the high-frequency dielectric plate, and the metallized through holes are arranged on the whole formed by the upper and lower layers of metal and the high-frequency dielectric plate.

[0009] In an optional implementation of the second aspect, two ports of the substrate integrated waveguide 90-degree bridge are connected to a millimeter wave modem transceiver through a microstrip transmission line.

[0010] In an optional implementation of the second aspect, an open narrow gap with an angle of 90 degrees is provided at the end of the substrate integrated waveguide 90 degree bridge.

[0011] In an optional implementation of the second aspect, the orthogonal half-mode waveguide excitation slot and the orthogonal mode synthetic waveguide circularly polarized radiator are an integrated metal structure fixed above the substrate integrated waveguide 90-degree bridge.

[0012] The present invention integrates the millimeter wave transceiver circuit with the dual circularly polarized antenna to achieve a higher directional gain, and realizes short-range ultra-high-speed wireless digital signal bidirectional transmission through a smaller circuit size, solving the problems of signal transmission in a small space, signal polarization alignment and stable transmission under antenna rotation and arbitrary angle placement (such as free rotating joints, etc.). BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. As shown in the drawings, the above and other purposes, features and advantages of the present application will be clearer. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately scaled to the actual size, and the focus is on showing the main purpose of the present application.

[0014] Figure 1 This is a schematic diagram of the millimeter wave dual circular polarization bidirectional data transmission module circuit provided by the present invention

[0015] Figure 2 This is a top view of the millimeter wave dual circular polarization bidirectional data transmission device provided by the present invention

[0016] Figure 3 This is a side view of the millimeter wave dual circular polarization bidirectional data transmission device provided by the present invention

[0017] Figure 4 This is a stereoscopic diagram of the millimeter wave dual circular polarization bidirectional data transmission device provided by the present invention

[0018] Figure 5 The antenna port reflection coefficient S11 frequency response curve of the embodiment of the present invention is

[0019] Figure 6 The antenna gain frequency response curve of the embodiment of the present invention is

[0020] Figure 7 is a normalized transmission frequency response curve of inter-module transmission and reception in an embodiment of the present invention;

[0021] Icons: 1-millimeter wave modem transceiver; 2-substrate integrated waveguide 90 degree bridge; 3-orthogonal half-mode waveguide excitation slot; 4-orthogonal mode synthetic waveguide circularly polarized radiator; 5-high frequency dielectric board; 6-metallized through hole; 7-microstrip transmission line; 8-upper and lower layers of metal; 9-open narrow slot. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is sought, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] like Figure 1 As shown, a millimeter wave dual circular polarization bidirectional data transmission module includes a millimeter wave modulation and demodulation transceiver 1, a substrate integrated waveguide 90 degree bridge 2, an orthogonal half-mode waveguide excitation slot 3, and an orthogonal mode synthetic waveguide circular polarization radiator 4. The millimeter wave modulation and demodulation transceiver 1, the transmitting circuit part directly modulates the transmitted high-speed baseband digital signal to the millimeter wave carrier through the ASK or OOK system and transmits it; the receiving circuit part receives the wideband modulation signal in the millimeter wave frequency band and performs detection and demodulation, and outputs the received high-speed baseband digital signal. The substrate integrated waveguide 90 degree bridge 2 performs transmission distribution and reception synthesis of the millimeter wave modulation signal with equal amplitude and 90 degree phase difference within the broadband range. The orthogonal half-mode waveguide excitation slot 3 forms a differential current through the substrate integrated waveguide slot to realize the conversion from the substrate integrated waveguide to the metal waveguide, and two vertical 90 degree half-mode metal waveguide slots form an electric field to excite the TE11 mode of the circular waveguide radiator 4.

[0028] The orthogonal mode synthetic waveguide circularly polarized radiator 4 excites two orthogonal polarization TE11 modes through a vertical waveguide slot, and distributes and synthesizes millimeter wave modulated signals through a substrate integrated waveguide 90-degree bridge 2, which can form left-right dual circular polarization transmission for transmission and reception.

[0029] refer to Figure 5-7 The present embodiment provides a 60GHz millimeter-wave dual circularly polarized bidirectional data transmission module operating in the V band, with a transmission and receiving baseband digital signal transmission rate of up to 5Gbps. The module antenna realizes dual circular polarization separation of transmission and reception through orthogonal TE11 mode synthesis, and the transmission bandwidth reaches 6.5GHz. When the module signal is transmitted, the angle between the waveguide circularly polarized antennas can be freely rotated without polarization alignment. The antenna diameter is 8mm, and the circular waveguide antenna gain is 9dbi, which can realize high-frequency broadband signal transmission in a small space.

[0030] refer to Figure 2-4 The second embodiment provided by the present invention comprises a millimeter wave modem transceiver 1, a substrate integrated waveguide 90 degree bridge 2, an orthogonal half-mode waveguide excitation slot 3, and an orthogonal mode synthetic waveguide circularly polarized radiator 4, which are sequentially set up on a circuit board. The millimeter wave transceiver signal port of the millimeter wave modem transceiver 1 is connected to the port of the substrate integrated waveguide 90 degree bridge 2. The transmitting circuit of the millimeter wave modem transceiver 1 mixes the input 0-5Gbps differential high-speed baseband digital signal with the internal local oscillator source through ASK modulation, thereby modulating the digital signal onto a 60GHz millimeter wave carrier for signal transmission. The receiving circuit part of the millimeter wave transceiver modem transceiver 1 demodulates the received millimeter wave digital modulation signal through incoherent envelope detection and comparison, and outputs the baseband digital signal in the form of differential level.

[0031] The transmitted millimeter-wave modulated signal is distributed through the substrate integrated waveguide 90-degree bridge 2 to obtain two transmission signals with equal amplitude and 90-degree phase difference. The two transmission signals are synthesized into right-hand circular polarization (RHCP) in the circular waveguide with two orthogonal TE11 modes; the received millimeter-wave modulated signal is synthesized at the receiving output port by the left-hand circular polarization (LHCP) mode through the substrate integrated waveguide 90-degree bridge 2.

[0032] The circularly polarized antenna part of the millimeter-wave dual circularly polarized bidirectional data transmission device is composed of a substrate integrated waveguide 90-degree bridge 2, an orthogonal half-mode waveguide excitation slot 3, and an orthogonal mode synthetic waveguide circularly polarized radiator 4. The substrate integrated waveguide 90-degree bridge is realized by a printed circuit board process, which is convenient for interconnection and integration with a millimeter-wave modem transceiver 1. The structure of this part of the substrate integrated waveguide 90-degree bridge is composed of a high-frequency dielectric plate 5, upper and lower metal layers 8, and a metallized through-hole 6. The two ports of the substrate integrated waveguide 90-degree bridge are directly connected to the millimeter-wave modem transceiver 1 through a microstrip transmission line 7, and the other two ports directly excite a group of vertical orthogonal half-mode waveguide excitation slots 3 above it through an open narrow slot 9 with an angle of 90 degrees at the end of the substrate integrated waveguide.

[0033] The orthogonal half-mode waveguide excitation slot 3 and the orthogonal mode synthetic waveguide circularly polarized radiator 4 are processed using an integrated metal structure and are directly pressed onto the printed circuit board where the substrate integrated waveguide 90-degree bridge 2 is located. There is a polarization degenerate and rotated TE11 mode in the circular waveguide. The two vertical half-mode waveguide excitation slots can form two orthogonal TE11 mode electromagnetic fields in the orthogonal mode synthetic waveguide circularly polarized radiator 4, and have good isolation characteristics. The 90-degree phase shift of the excited signal by the 90-degree bridge makes the two orthogonal TE11 mode electromagnetic fields The phase difference is 90 degrees, thereby forming a left-handed or right-handed circularly polarized wave. In this embodiment, the transmitting signal is synthesized into a right-handed circular polarization in the circular waveguide after passing through a 90-degree bridge, and is radiated into space through the end opening of the orthogonal mode synthetic waveguide circularly polarized radiator 4. The field phase of the received left-handed circularly polarized signal at the gap of the two half-mode waveguides differs by 90°, and in-phase synthesis is achieved at the receiving end port of the 90-degree bridge. The transmission and reception of the embodiment use separate ports and different polarizations to achieve bidirectional transmission, and the two polarizations share the aperture of the orthogonal mode synthetic waveguide circularly polarized radiator 4.

[0034] Figure 5-7 The port reflection, gain curve and transmission response of the embodiment of the present invention are given. It can be seen from the results that the module transmission 1dB bandwidth reaches 5GHz, and its 3dB bandwidth exceeds 6.5GHz. This millimeter wave dual circular polarization bidirectional data transmission module and device reduces the millimeter wave signal loss, improves the amplitude balance and orthogonality of the power distribution of polarization synthesis, and reduces the PCB process sensitivity of circuit processing, and improves the axial ratio performance of the antenna through the substrate integrated waveguide 90-degree bridge. The present invention works in the millimeter wave frequency band, supports bidirectional transmission and reception, and the transmission bandwidth reaches more than 6.5GHz, and can transmit broadband digital signals up to 5Gbps; the module antenna of the present invention has high gain and small size. The modules can be rotated to any angle in a small space and high-speed digital signal transmission can be carried out, which is easy to integrate with other circuits.

Claims

1. A millimeter wave dual circular polarization bidirectional data transmission module, characterized in that: It comprises a millimeter wave modem transceiver, a substrate integrated waveguide 90 degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode synthetic waveguide circularly polarized radiator; the substrate integrated waveguide 90 degree bridge is connected to the millimeter wave modem transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90 degree bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected to the orthogonal half-mode waveguide excitation slot; The substrate integrated waveguide 90-degree bridge comprises upper and lower metal layers, a high-frequency dielectric plate and a metallized through hole, wherein the upper and lower metal layers cover both sides of the high-frequency dielectric plate, and the metallized through hole is arranged on the whole formed by the upper and lower metal layers and the high-frequency dielectric; The millimeter wave modem transceiver includes a transmitting circuit and a receiving circuit; The transmitting circuit modulates the high-speed baseband digital signal into a millimeter wave digital signal, and transmits the millimeter wave digital signal to the substrate integrated waveguide 90-degree bridge to obtain two transmission signals with equal amplitudes and a phase difference of 90 degrees. The two transmission signals can synthesize right-hand circular polarization through two orthogonal TE11 modes, and are synthesized by the orthogonal TE11 modes and radiated into space through the opening at the end of the waveguide circularly polarized radiator; The receiving circuit receives the millimeter wave digital signal output by the substrate integrated waveguide 90 degree bridge, and demodulates the millimeter wave digital signal into a high-speed baseband digital signal in a left-handed circularly polarized mode, and synthesizes it at the receiving port of the receiving circuit of the millimeter wave modem transceiver through the substrate integrated waveguide 90 degree bridge.

2. A millimeter wave dual circular polarization bidirectional data transmission device, characterized in that: It comprises a millimeter wave modem transceiver, a substrate integrated waveguide 90 degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode synthetic waveguide circularly polarized radiator which are sequentially arranged on a circuit board; the substrate integrated waveguide 90 degree bridge is connected to the millimeter wave modem transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90 degree bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected to the orthogonal half-mode waveguide excitation slot; The substrate integrated waveguide 90-degree bridge comprises upper and lower metal layers, a high-frequency dielectric plate and a metallized through hole, wherein the upper and lower metal layers cover both sides of the high-frequency dielectric plate, and the metallized through hole is arranged on the whole formed by the upper and lower metal layers and the high-frequency dielectric; The millimeter wave modem transceiver includes a transmitting circuit and a receiving circuit; The transmitting circuit modulates the high-speed baseband digital signal into a millimeter wave digital signal, and transmits the millimeter wave digital signal to the substrate integrated waveguide 90-degree bridge to obtain two transmission signals with equal amplitudes and a phase difference of 90 degrees. The two transmission signals can synthesize right-hand circular polarization through two orthogonal TE11 modes, and are synthesized by the orthogonal TE11 modes and radiated into space through the opening at the end of the waveguide circularly polarized radiator; The receiving circuit receives the millimeter wave digital signal output by the substrate integrated waveguide 90 degree bridge, and demodulates the millimeter wave digital signal into a high-speed baseband digital signal in a left-handed circularly polarized mode, and synthesizes it at the receiving port of the receiving circuit of the millimeter wave modem transceiver through the substrate integrated waveguide 90 degree bridge.

3. The millimeter wave dual circular polarization bidirectional data transmission device according to claim 2, characterized in that: The two ports of the substrate integrated waveguide 90-degree bridge are connected to the millimeter wave modem transceiver through a microstrip transmission line.

4. The millimeter wave dual circular polarization bidirectional data transmission device according to claim 2, characterized in that: An open narrow gap with an angle of 90 degrees is arranged at the end of the substrate integrated waveguide 90-degree bridge.

5. The millimeter wave dual circular polarization bidirectional data transmission device according to claim 2, characterized in that: The orthogonal half-mode waveguide excitation slot and the orthogonal mode synthetic waveguide circularly polarized radiator are an integrated metal structure, which is fixed above the substrate integrated waveguide 90-degree bridge.

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