CN111276815A - Millimeter wave dual-circular polarization bidirectional data transmission module and device - Google Patents

Abstract

The invention provides a millimeter wave dual circular polarization bidirectional data transmission module and device, including a millimeter wave modulation and demodulation 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 modulation and demodulation transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate integrated waveguide 90-degree bridge, and the orthogonal mode synthetic waveguide circle The polarized radiator and the orthogonal half-mode waveguide excitation slot are connected. The invention achieves higher orientation by integrating the millimeter wave modulation and demodulation 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 the circuit board. Gain, through small circuit size to achieve short-range ultra-high-speed wireless digital signal bidirectional transmission.

Description

A millimeter wave dual circular polarization bidirectional data transmission module and device

technical field

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

Background technique

Wireless broadband digital communication technology has a wide range of applications in industrial applications and daily life. With the development of the Internet, many data services have emerged, and the demand for broadband wireless data transmission has also increased exponentially. Traditional wireless transmission technologies, such as Bluetooth, WiFi, Zigbee, etc., bring great convenience in daily life, but these technologies have narrow bandwidth and are difficult to meet some emerging broadband high-speed data transmission services, such as high-definition video streaming up to several Gbps At the same time, these traditional technologies have low frequency bands and long wavelengths, making it difficult to arrange and transmit in some small space sizes.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a millimeter-wave dual circularly polarized bidirectional data transmission module and device, which integrates a millimeter-wave transceiver circuit and a dual circularly polarized antenna, and solves the problems of signal polarization alignment and stable transmission in a narrow space .

The first aspect: the present application provides a millimeter wave dual circular polarization bidirectional data transmission module, including a millimeter wave modulation and demodulation transceiver, a substrate integrated waveguide 90-degree bridge, an orthogonal half-mode waveguide excitation slot and an orthogonal mode A synthetic waveguide circularly polarized radiator; a substrate-integrated waveguide 90-degree bridge is connected to the millimeter-wave modulation and demodulation transceiver, the orthogonal half-mode waveguide excitation slot is connected to the substrate-integrated waveguide 90-degree bridge, The orthogonal mode synthetic waveguide circularly polarized radiator is connected with the orthogonal half-mode waveguide excitation slot.

In an optional implementation of the first aspect, the millimeter-wave modem transceiver further 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 A waveguide 90-degree bridge, the receiving circuit is used for receiving the millimeter-wave digital signal output by the substrate-integrated waveguide 90-degree bridge and demodulating it into a high-speed baseband digital signal.

In a second aspect, the present invention provides a millimeter-wave dual-circular polarization bidirectional data transmission device, including a millimeter-wave modulation and demodulation transceiver, a substrate integrated waveguide 90-degree bridge, an orthogonal half-mode and a A 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 modulation and demodulation transceiver, and the orthogonal half-mode waveguide excitation slot and the base The sheet-integrated waveguide is connected by a 90-degree bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected with the orthogonal half-mode waveguide excitation slot.

In an optional implementation of the second aspect, the millimeter-wave modem transceiver further 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 A waveguide 90-degree bridge, the receiving circuit is used for receiving the millimeter-wave digital signal output by the substrate-integrated waveguide 90-degree bridge and demodulating it into a high-speed baseband digital signal.

In an optional implementation manner 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, and the upper and lower layers of metal cover both sides of the high-frequency dielectric plate, The metallized through holes are arranged on the whole composed of the upper and lower layers of metal and the high-frequency dielectric plate.

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

In an optional implementation manner of the second aspect, the end of the 90-degree bridge of the substrate-integrated waveguide is provided with an open narrow slit with an included angle of 90 degrees.

In an optional implementation manner of the second aspect, the orthogonal half-mode waveguide excitation slot and the orthogonal-mode composite waveguide circularly polarized radiator are integrated metal structures, and are fixed above the substrate-integrated waveguide 90-degree bridge .

The invention integrates the millimeter-wave transceiver circuit and the dual circularly polarized antenna to achieve higher directional gain, realizes short-range ultra-high-speed wireless digital signal bidirectional transmission through smaller circuit size, and solves the problem of signal transmission and antenna rotation in a narrow space. The problem of signal polarization alignment and stable transmission when placed at any angle (such as free rotating joints, etc.).

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort. The above and other objects, features and advantages of the present application will be more apparent from the accompanying drawings. The same reference numerals refer to the same parts throughout the drawings. The drawings are not intentionally scaled to actual size, and the emphasis is on illustrating the subject matter of the present application.

1 is a schematic circuit diagram of a millimeter-wave dual circular polarization bidirectional data transmission module provided by the present invention

Fig. 2 is the top view of the millimeter wave dual circular polarization bidirectional data transmission device provided by the present invention

3 is a side view of a millimeter-wave dual circular polarization bidirectional data transmission device provided by the present invention

4 is a perspective view of a millimeter-wave dual circular polarization bidirectional data transmission device provided by the present invention

Fig. 5 is the frequency response curve of the reflection coefficient S11 of the antenna port according to the embodiment of the present invention

Fig. 6 is the antenna gain frequency response curve of the embodiment of the present invention

7 is a normalized transmission frequency response curve of inter-module transceiver and mutual transmission according to an embodiment of the present invention;

Icon: 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-metalized through hole; 7-microstrip transmission line; 8-upper and lower metal; 9-opening narrow gap.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments This is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. Thus, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", " The orientation or positional relationship indicated by "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying the device or device in question. Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

As shown in Figure 1, 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, an orthogonal Mode synthetic waveguide circularly polarized radiator 4 . 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 frequency through ASK or OOK format and sends it; the receiving circuit part receives the wideband modulation signal in the millimeter wave frequency band and performs detection and demodulation , output the received high-speed baseband digital signal. The substrate-integrated waveguide 90-degree bridge 2 performs transmit distribution and receive synthesis of the millimeter-wave modulated signal with equal amplitude and a phase difference of 90 degrees in a broadband range. Orthogonal half-mode waveguide excitation slot 3, a differential current is formed through the substrate integrated waveguide slot to realize the conversion from the substrate integrated waveguide to the metal waveguide, and two half-mode metal waveguide slots perpendicular to 90 degrees form an electric field to excite the TE11 of the circular waveguide radiator 4 mold.

Orthogonal-mode synthetic waveguide circularly polarized radiator 4 excites two orthogonally polarized 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 a transceiving Left and right-handed dual circularly polarized transmission.

Referring to Figures 5-7, this embodiment provides a 60GHz millimeter-wave dual circularly polarized bidirectional data transmission module operating in the V-band. The transmit and receive baseband digital signal transmission bit rates can reach up to 5Gbps, and the module antenna passes through the orthogonal TE11 mode. Synthesis realizes the separation of dual circular polarizations for transceivers, the transmission bandwidth reaches 6.5GHz, the angle between the circularly polarized waveguide antennas can be freely rotated during module signal transmission, and no polarization alignment is required. Realize high-frequency broadband signal transmission in space.

Referring to FIGS. 2-4 , the second embodiment provided by the present invention includes a millimeter wave modem transceiver 1 , a substrate integrated waveguide 90-degree bridge 2 , and an orthogonal half-mode waveguide excitation slot 3 , which are sequentially established on a circuit board. , Orthogonal mode synthetic waveguide circularly polarized radiator 4 . The millimeter-wave transceiver signal port of the millimeter-wave modem transceiver 1 is connected to the substrate integrated waveguide 90-degree bridge 2 port, and the transmitting circuit of the millimeter-wave modem transceiver 1 passes the input 0-5Gbps differential high-speed baseband digital signal through The ASK modulation method is mixed with the internal local oscillator source, so as to modulate the digital signal on the 60GHz millimeter wave carrier for signal transmission. Demodulate the received millimeter wave digital modulation signal, and output the baseband digital signal in the form of differential level.

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 transmitted signals are transmitted in the circular waveguide as two orthogonal TE11 modes Synthesize right-hand circular polarization (RHCP); the received millimeter-wave modulated signal is synthesized by the left-hand circular polarization (LHCP) mode through the substrate integrated waveguide 90-degree bridge 2 at the receiving output port.

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

The orthogonal half-mode waveguide excitation slot 3 and the orthogonal-mode synthetic waveguide circularly polarized radiator 4 are processed with an integrated metal structure, and are directly pressed on the printed circuit board where the substrate integrated waveguide 90 is located, and the circular waveguide memory In the TE11 mode with polarization degenerate rotation, two vertical half-mode waveguide excitation slits can form two orthogonal TE11 mode electromagnetic fields in the orthogonal mode synthetic waveguide circularly polarized radiator 4, and at the same time have good isolation characteristics; The 90-degree phase shift of the excited signal by the 90-degree bridge makes the electromagnetic fields of the two orthogonal TE11 modes have a phase difference of 90 degrees, thereby forming a left-handed or right-handed circularly polarized wave. In this embodiment, the transmitted signal passes through 90 degrees. After the electrical bridge, the right-handed circular polarization is synthesized in the circular waveguide, and radiated into the space through the end opening of the orthogonal-mode synthetic waveguide circularly polarized radiator 4, and the received left-handed circularly polarized signal is at the two half-mode waveguide slots. The phase difference of the fields is 90°, and the in-phase synthesis is realized at the receiving end port of the 90-degree bridge. In the embodiment, the transmission and reception use separate ports and different polarizations to achieve bidirectional transmission, and the two polarizations share the orthogonal mode synthesis waveguide circular pole. Radiator with 4 calibers.

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

Claims (8)

1. The utility model provides a two circular polarization two-way data transmission module of millimeter wave which characterized in that: the device comprises a millimeter wave modulation and demodulation transceiver, a substrate integrated waveguide 90-degree electric bridge, an orthogonal half-mode waveguide excitation gap and an orthogonal mode synthesis waveguide circularly polarized radiator; the substrate integrated waveguide 90-degree electric bridge is connected with the millimeter wave modulation and demodulation transceiver, the orthogonal half-mode waveguide excitation gap is connected with the substrate integrated waveguide 90-degree electric bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected with the orthogonal half-mode waveguide excitation gap.

2. The millimeter wave dual-circular polarization bidirectional data transmission module of claim 1, wherein: the millimeter wave modulation and demodulation transceiver further comprises a transmitting circuit and a receiving circuit, wherein the transmitting circuit is used for modulating the high-speed baseband digital signals into millimeter wave digital signals and transmitting the millimeter wave digital signals to the substrate integrated waveguide 90-degree bridge, and the receiving circuit is used for receiving the millimeter wave digital signals output by the substrate integrated waveguide 90-degree bridge and demodulating the millimeter wave digital signals into the high-speed baseband digital signals.

3. A millimeter wave dual-circular polarization bidirectional data transmission device is characterized in that: the device comprises a millimeter wave modulation and demodulation transceiver, a substrate integrated waveguide 90-degree electric bridge, an orthogonal half-mode waveguide excitation gap and an orthogonal mode synthesis waveguide circularly polarized radiator which are sequentially arranged on a circuit board; the substrate integrated waveguide 90-degree electric bridge is connected with the millimeter wave modulation and demodulation transceiver, the orthogonal half-mode waveguide excitation gap is connected with the substrate integrated waveguide 90-degree electric bridge, and the orthogonal mode synthetic waveguide circularly polarized radiator is connected with the orthogonal half-mode waveguide excitation gap.

4. The millimeter wave dual-circular polarization bidirectional data transmission module of claim 3, wherein: the millimeter wave modulation and demodulation transceiver further comprises a transmitting circuit and a receiving circuit, wherein the transmitting circuit is used for modulating the high-speed baseband digital signals into millimeter wave digital signals and transmitting the millimeter wave digital signals to the substrate integrated waveguide 90-degree bridge, and the receiving circuit is used for receiving the millimeter wave digital signals output by the substrate integrated waveguide 90-degree bridge and demodulating the millimeter wave digital signals into the high-speed baseband digital signals.

5. The millimeter wave dual-circular polarization bidirectional data transmission device according to claim 3, wherein: the substrate integrated waveguide 90-degree electric bridge comprises upper and lower layers of metal, a high-frequency dielectric plate and metalized through holes, wherein the upper and lower layers of metal cover two sides of the high-frequency dielectric plate, and the metalized through holes are formed in a whole formed by the upper and lower layers of metal and the high-frequency dielectric plate.

6. The millimeter wave dual-circular polarization bidirectional data transmission device according to claim 3, wherein: and two ports of the substrate integrated waveguide 90-degree bridge are connected with the millimeter wave modulation-demodulation transceiver through microstrip transmission lines.

7. The millimeter wave dual-circular polarization bidirectional data transmission device according to claim 3, wherein: and the tail end of the substrate integrated waveguide 90-degree electric bridge is provided with an opening narrow gap with an included angle of 90 degrees.

8. The millimeter wave dual-circular polarization bidirectional data transmission device according to claim 3, wherein: the orthogonal half-mode waveguide excitation gap and the orthogonal mode combined waveguide circularly polarized radiator are of an integrated metal structure and are fixed above the substrate integrated waveguide 90-degree electric bridge.

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