Antenna device for realizing multi-excitation mode polarized waves

Abstract

The present disclosure provides an antenna device for realizing multi-excitation mode polarized waves, comprising: a short-circuit surface, which is entirely a metal surface; an excitation end, which is multiple in number and is arranged on a signal layer for outputting an excitation signal; and a conductive cylinder array, which comprises a plurality of conductive cylinders parallel to each other, the conductive cylinders extending in a direction perpendicular to the short-circuit surface, the plurality of conductive cylinders and the short-circuit surface forming a first cavity, and the first end of the conductive cylinder array being in contact with the short-circuit surface.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to an antenna device for realizing multi-excitation mode polarized waves. Background Art

[0002] Circularly polarized waves have good resistance to rain and fog interference and have a strong ability to penetrate the ionosphere. They are not affected by the Faraday effect generated by the magnetic field at the earth's poles.

[0003] Commonly used methods for realizing circular polarization include single-feed technology, dual-feed technology, and circular polarizer. Among them, single-feed technology often uses angle cutting, patch surface slotting or other methods to add micro-perturbation to realize circular polarization. For example, the circularly polarized angle-cut patch antenna has a simple structure and is easy to realize, but the bandwidth is very narrow and is not suitable for wide-band applications. In order to increase the bandwidth range, a laminated structure is often used, but this will increase the difficulty of processing; and the dual-feed technology, by using two ports to apply two orthogonal signals with equal amplitude and a phase difference of 90°, can realize circular polarization in a relatively wide frequency band, but this technology requires a relatively complex feeding network and is difficult to realize in the millimeter wave band; and the circular polarizer technology is to use a circular polarizer to convert linearly polarized electromagnetic waves into circularly polarized waves during the propagation process. Commonly used circular polarizers are circular polarizers with metal patterns and dielectric polarizers. Among them, metal pattern polarizers are easier to realize, but the loss is relatively large, and the processing of dielectric polarizers is relatively complex. The higher the frequency band, the more difficult the processing, and it is difficult to use in the millimeter wave band.

[0004] The energy of linearly polarized waves is relatively concentrated, and they have better penetration into materials with higher density.

[0005] In the prior art, most radars are equipped with a single linear polarization antenna or a single circular polarization antenna, and lack an antenna structure that integrates multiple polarization modes to give full play to the advantages of various polarization waves. Summary of the invention

[0006] In order to solve at least one of the above technical problems, the present disclosure provides an antenna device that realizes multi-excitation mode polarized waves.

[0007] The antenna device for realizing multi-excitation mode polarized waves disclosed in the present invention is realized by the following technical solution.

[0008] According to one aspect of the present disclosure, there is provided an antenna device for realizing multi-excitation mode polarized waves, comprising:

[0009] A short-distance road surface, wherein the short-distance road surface is entirely made of metal surfaces;

[0010] An excitation end, wherein the number of the excitation ends is plural and the excitation ends are arranged on the signal layer, and are used to output an excitation signal, wherein the excitation signal can interact with the short-circuit surface to realize the generation of a polarized wave;

[0011] A conductive cylinder array comprises a plurality of conductive cylinders parallel to each other, the conductive cylinders extend in a direction perpendicular to the short-circuit surface, the plurality of conductive cylinders and the short-circuit surface form a first cavity, and a first end of the conductive cylinder array contacts the short-circuit surface.

[0012] According to at least one embodiment of the present disclosure, the antenna device for realizing multi-excitation mode polarized waves also includes a multi-layer circuit board, which includes at least one signal layer, at least one ground layer and at least one layer of insulating medium, wherein the short-circuit board is arranged on a certain ground layer, and the multiple excitation ends are arranged on a common signal layer, or arranged on multiple signal layers, and the ground layer where the short-circuit board is located is arranged below the signal layer where the multiple excitation ends are located.

[0013] According to at least one embodiment of the present disclosure, an antenna device for realizing multi-excitation mode polarized waves, the multiple excitation ends include a first excitation end and a second excitation end, the first excitation end and the second excitation end are at least partially located within the first cavity, a first excitation signal output by the first excitation end can interact with the short-circuit surface to generate a polarized wave of a first excitation mode, a second excitation signal output by the second excitation end can interact with the short-circuit surface to generate a polarized wave of a second excitation mode, and the polarized wave of the first excitation mode and the polarized wave of the second excitation mode can be transmitted via the conductive cylinder array.

[0014] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the first excitation signal and the second excitation signal have the same or different signal frequencies and the same or different signal amplitudes.

[0015] According to at least one embodiment of the antenna device for realizing multi-excitation mode polarized waves of the present disclosure, the first excitation end and the second excitation end are arranged on different signal layers, so that the first excitation end and the second excitation end have different distances from the short-circuit surface, thereby obtaining polarized waves of different frequencies.

[0016] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the excitation signal corresponding to the polarized wave of the first excitation mode and the excitation signal corresponding to the polarized wave of the second excitation mode are set to be generated simultaneously or at a predetermined time interval.

[0017] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the insertion direction of the first excitation end and / or the second excitation end can be adjusted.

[0018] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the polarized waves of the first excitation mode and the polarized waves of the second excitation mode have different beam angles.

[0019] According to at least one embodiment of the present disclosure, an antenna device for realizing multi-excitation mode polarized waves, the multiple excitation ends include a first excitation end and a second excitation end, the first excitation end and the second excitation end are configured on the same signal layer and simultaneously output two excitation signals of the same frequency and amplitude, the two excitation signals simultaneously interact with the short-circuit surface to generate a polarized wave of a third excitation mode, and the polarized wave of the third excitation mode can be transmitted via the conductive cylinder array; wherein the two excitation signals have a phase angle difference, and an excitation end angle is formed between the first excitation end and the second excitation end, so that the phase angle difference is equal to the excitation end angle and both are 90 degrees.

[0020] According to at least one embodiment of the antenna device for realizing multi-excitation mode polarized waves of the present disclosure, the multiple excitation ends also include a third excitation end and / or a fourth excitation end, the third excitation end is used to output a third excitation signal and / or the fourth excitation end is used to output a fourth excitation signal, the third excitation signal interacts with the short-circuit surface to generate a polarized wave of a first excitation mode and / or the fourth excitation signal interacts with the short-circuit surface to generate a polarized wave of a second excitation mode, and the polarized wave of the first excitation mode and / or the polarized wave of the second excitation mode can be transmitted via the conductive cylinder array.

[0021] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the excitation signal corresponding to the polarized wave of the third excitation mode has the same or different signal frequency as the excitation signal corresponding to the polarized wave of the first excitation mode and / or the excitation signal corresponding to the polarized wave of the second excitation mode, and the same or different signal amplitude.

[0022] According to at least one embodiment of the antenna device for realizing multi-excitation mode polarized waves disclosed herein, the first excitation end and the second excitation end are arranged on different signal layers from the third excitation end and / or the fourth excitation end, so that the distance between the first excitation end and the second excitation end and the short-circuit surface is different from the distance between the third excitation end and / or the fourth excitation end and the short-circuit surface, so as to obtain polarized waves of different frequencies.

[0023] According to at least one embodiment of the antenna device for realizing multi-excitation mode polarized waves disclosed herein, the excitation signal corresponding to the polarized wave of the third excitation mode and the excitation signal corresponding to the polarized wave of the first excitation mode and / or the excitation signal corresponding to the polarized wave of the second excitation mode are set to be generated simultaneously or at a predetermined time interval.

[0024] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the insertion direction of the first excitation end, the second excitation end, the third excitation end and / or the fourth excitation end can be adjusted.

[0025] According to the antenna device realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the polarized waves of the third excitation mode have different beam angles from the polarized waves of the first excitation mode and / or the polarized waves of the second excitation mode.

[0026] According to at least one embodiment of the present disclosure, the antenna device for realizing multi-excitation mode polarized waves also includes a waveguide portion, a first end of the waveguide portion is connected to the second end of the conductive cylinder array, so that the polarized waves of each excitation mode transmitted through the conductive cylinder array can be emitted through the waveguide portion.

[0027] According to the antenna device for realizing multi-excitation mode polarized waves of at least one embodiment of the present disclosure, the short-circuit surface is a copper-clad layer.

[0028] According to at least one embodiment of the antenna device for realizing multi-excitation mode polarized waves of the present disclosure, the conductive cylinder is a via body, the first end, the inner wall and the second end of the via body are all provided with a metal layer, and the first end of the via body is in contact with the short-circuit surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0030] Figure 1 It is a schematic diagram of the configuration of multiple excitation ends of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Figure 2 It is a schematic diagram of the configuration of multiple excitation ends of an antenna device for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure. Figure 3 It is a schematic diagram of the excitation end configuration of an antenna device for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure. Figure 4 It is a schematic structural diagram of a conductive cylinder of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Figures 5 to 7 A schematic diagram showing the configuration of an antenna device for realizing multi-excitation mode polarized waves according to different embodiments of the present disclosure. Figure 8 It is a schematic diagram of the structure of a radar radio frequency transceiver module according to an embodiment of the present disclosure. Fig. 9 It is a schematic diagram of signal transmission and reception of an antenna device that realizes multi-excitation mode polarized waves according to an embodiment of the present disclosure. Fig.10It is a schematic diagram of signal transmission and reception of an antenna device for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure. Fig.11 and Fig.12 A schematic diagram of signal transmission and reception of an antenna device for realizing multi-excitation mode polarized waves according to different embodiments of the present disclosure is shown. Fig.13 It is a schematic diagram of the three-dimensional structure of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Fig.14 It is a partial structural diagram of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Fig.15 It is a schematic diagram of the configuration of a waveguide portion and a conductive cylinder array of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Fig.16 It is a schematic structural diagram of a four-port coupler according to an embodiment of the present disclosure. Fig.17 It is a schematic diagram of realizing level measurement using an antenna device of multi-excitation mode polarized waves based on an embodiment of the present disclosure. Fig.18 This is an example diagram of acquiring a target object echo signal by removing an interference object echo signal according to an embodiment of the present disclosure.

[0031] Description of Reference Numerals

[0032] 110 Signal layer

[0033] 111 First excitation terminal

[0034] 112 Second excitation terminal

[0035] 113 Third excitation terminal

[0036] 114 Fourth excitation terminal

[0037] 115 signal transmission line

[0038] 120 Short Road

[0039] 130 Insulation medium

[0040] 140 Conductive Cylinder Array

[0041] 141 Conductive cylinder

[0042] 150 Waveguide

[0043] 160 Multilayer PCB

[0044] 170 Circulator / Coupler

[0045] 180 Ground plane

[0046] 200 Radar RF transceiver module

[0047] 300 Signal gating module

[0048] 1000 An antenna device for realizing multi-excitation mode polarized waves. DETAILED DESCRIPTION

[0049] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0052] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0053] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0054] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "upper," "above," "higher," and "side (e.g., in a "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0055] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0056] Combined with the following Figures 1 to 18 The antenna device for realizing multi-excitation mode polarized waves disclosed in the present invention is described in detail. Figures 1 to 7 .

[0057] According to an embodiment of the present disclosure, an antenna device 1000 for realizing multi-excitation mode polarized waves includes:

[0058] A short-circuit road surface 120, which is a metal surface;

[0059] Excitation terminals, which are multiple in number and are disposed on the signal layer 110 and are used to output excitation signals, and the excitation signals can interact with the short-circuit surface 120 to generate polarized waves;

[0060] The conductive cylinder array 140 includes a plurality of conductive cylinders 141 parallel to each other. The conductive cylinders 141 extend in a direction perpendicular to the short-circuit surface 120 . The plurality of conductive cylinders 141 and the short-circuit surface 120 form a first cavity. The first end of the conductive cylinder array 140 contacts the short-circuit surface 120 .

[0061] According to an embodiment of the present disclosure, an antenna device 1000 for realizing multi-excitation mode polarized waves also includes a multilayer circuit board 160, which includes at least one signal layer 110, at least one ground layer 180 and at least one layer of insulating medium 130, wherein a short-circuit board 120 is arranged on one of the ground layers 180, and multiple excitation ends are arranged on a common signal layer 110, or on multiple signal layers 110, and the ground layer 180 where the short-circuit board 120 is located is arranged below the signal layer 110 where the multiple excitation ends are located.

[0062] The antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention can form polarized waves of multiple excitation modes on a multi-layer circuit board based on the interaction between multiple excitation ends and a short-circuit board, so as to realize the emission of multiple types of polarized waves.

[0063] Figure 1 FIG. 1 is a schematic diagram of the configuration of multiple excitation ends of an antenna device 1000 for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Figure 1 In the antenna device 1000 for realizing multi-excitation mode polarized waves of this embodiment, the excitation end includes a first excitation end 111 and a second excitation end 112, wherein the first excitation end 111 and the second excitation end 112 are at least partially located in the first cavity, the first excitation signal output by the first excitation end 111 interacts with the short-circuit board 120 to generate a polarized wave of the first excitation mode, the second excitation signal output by the second excitation end 112 interacts with the short-circuit board 120 to generate a polarized wave of the second excitation mode, and the polarized wave of the first excitation mode and the polarized wave of the second excitation mode can be transmitted via the conductive cylinder array 140. The polarized wave of the first excitation mode can be a horizontal linear polarized wave, and the polarized wave of the second excitation mode can be a vertical linear polarized wave, that is, the antenna device 1000 for realizing multi-excitation mode polarized waves of this embodiment can output at least two linear polarized waves of the excitation modes.

[0064] At the same time, the first excitation end 111 and the second excitation end 112 can be arranged on the same signal layer 110, or on different signal layers 110. When the first excitation end 111 and the second excitation end 112 are arranged on different signal layers 110, the first excitation end 111 and the second excitation end 112 have different distances from the short-circuit surface 120, and polarized waves of different frequencies are obtained. In addition, the insertion direction of the first excitation end 111 and / or the second excitation end 112 can be adjusted. The excitation signal corresponding to the polarized wave of the first excitation mode and the excitation signal corresponding to the polarized wave of the second excitation mode can be set to be generated at the same time, or can be set to be generated at different times, such as being generated at a predetermined time interval, etc., and the first excitation signal and the second excitation signal can be configured to have the same frequency or different frequencies, the same signal amplitude or different signal amplitudes, and the frequencies of the linearly polarized waves of the two excitation modes generated by the first excitation signal and the second excitation signal of different frequencies are also different, and the polarized wave of the first excitation mode and the polarized wave of the second excitation mode have different beam angles.

[0065] The excitation end described above may be in the form of a probe formed by a copper foil circuit, or in the form of a patch antenna or a dipole.

[0066] For the antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention, wherein the first cavity is preferably a cylindrical space region, the first cavity can also be an elliptical cylindrical annular space region, or a rectangular space region, and those skilled in the art can adjust the shape of the conductive cylinder array 140 to form first cavities of different shapes, all of which fall within the protection scope of the present disclosure.

[0067] refer to Figures 1 to 7 The first cavity described above is a cylindrical space region, and the conductive cylinder array 140 is a cylindrical conductive cylinder array.

[0068] According to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, each excitation end is completely extended into the first cavity described above.

[0069] For the antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention, preferably, each excitation end is a metal wire, preferably made of metal copper. Those skilled in the art can adjust the material of each excitation end, which falls within the protection scope of the present disclosure.

[0070] In the present disclosure, the excitation signals outputted by each excitation end are electromagnetic wave signals (microwave signals). Preferably, the short-circuit surface 120 described above is a copper-clad layer.

[0071] Figure 2This is a schematic diagram of the configuration of multiple excitation ends of an antenna device 1000 for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure. The antenna device 1000 for realizing multi-excitation mode polarized waves according to this embodiment can generate polarized waves (circularly polarized waves) of a third excitation mode by configuring the excitation ends. In addition, by increasing the number of adjustment excitation ends, it is possible to generate polarized waves (circularly polarized waves) of the third excitation mode while also generating polarized waves (horizontally linear polarized waves) of the first excitation mode and / or polarized waves (vertically linear polarized waves) of the second excitation mode.

[0072] According to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, the excitation end includes a first excitation end 111 and a second excitation end 112, wherein the first excitation end 111 and the second excitation end 112 need to be arranged on the same signal layer 110, and are configured to simultaneously output excitation signals of the same frequency and amplitude, and simultaneously interact with the short-circuit surface 120 to generate a polarized wave (circularly polarized wave) of the third excitation mode, and the polarized wave (circularly polarized wave) of the third excitation mode can be transmitted via the conductive cylinder array 140. At this time, the first excitation signal and the second excitation signal have a phase angle difference, and an excitation end angle is formed between the first excitation end 111 and the second excitation end 112, and the phase angle difference is equal to the excitation end angle and both are 90 degrees.

[0073] According to another preferred embodiment of the present disclosure, the antenna device 1000 for realizing multi-excitation mode polarized waves also includes a third excitation terminal 113 and / or a fourth excitation terminal 114, the third excitation terminal 113 is used to output a third excitation signal and / or the fourth excitation terminal 114 is used to output a fourth excitation signal, the third excitation signal can interact with the short-circuit surface 120 to generate a polarized wave of a first excitation mode (horizontal linear polarized wave) and / or the fourth excitation signal can interact with the short-circuit surface 120 to generate a polarized wave of a second excitation mode (vertical linear polarized wave), and the polarized wave of the first excitation mode (horizontal linear polarized wave) and / or the polarized wave of the second excitation mode (vertical linear polarized wave) can be transmitted via the conductive cylinder array 140.

[0074] refer to Figure 2 In this embodiment, the first excitation end 111 and the second excitation end 112 are used as excitation ends for generating polarized waves in the third excitation mode. The first excitation end 111 and the second excitation end 112 are perpendicular to each other, and both simultaneously transmit excitation signals with the same signal amplitude, the same frequency, and a phase difference of 90 degrees. The third excitation end 113 is used as the excitation end of the polarized wave in the first excitation mode and / or the fourth excitation end 114 is used as the excitation end of the polarized wave in the second excitation mode, for generating horizontal linear polarized waves and / or vertical linear polarized waves.

[0075] The first excitation terminal 111 and the second excitation terminal 112 and the third excitation terminal 113 and / or the fourth excitation terminal 114 can be arranged on the same signal layer 110, or on different signal layers 110. When the first excitation terminal 111 and the second excitation terminal 112 and the third excitation terminal 113 and / or the fourth excitation terminal 114 are arranged on different signal layers 110, the first excitation terminal 111 and the second excitation terminal 112 and the third excitation terminal 113 and / or the fourth excitation terminal 114 have different distances from the short-circuit surface 120, and polarized waves of different frequencies are obtained. In addition, the insertion direction of the first excitation terminal 111, the second excitation terminal 112, the third excitation terminal 113 and / or the fourth excitation terminal 114 can be adjusted. And the excitation signal corresponding to the third excitation mode polarized wave (circular polarized wave) and the excitation signal corresponding to the first excitation mode polarized wave (horizontal linear polarized wave) and / or the excitation signal corresponding to the second excitation mode polarized wave (vertical linear polarized wave) can be set to be generated simultaneously, or can be set to be generated at different times, such as being generated in a predetermined time interval.

[0076] In addition, the excitation signal corresponding to the polarized wave of the third excitation mode can be configured to have the same or different frequencies and the same or different signal amplitudes as the excitation signal corresponding to the polarized wave of the first excitation mode and / or the excitation signal corresponding to the polarized wave of the second excitation mode. The frequencies of the polarized waves generated by excitation signals of different frequencies are also different. At the same time, the polarized wave of the third excitation mode (circularly polarized wave) has a different beam angle from the polarized wave of the first excitation mode (horizontally linear polarized wave) and / or the polarized wave of the second excitation mode (vertically linear polarized wave).

[0077] Figure 3 It is a schematic diagram of the excitation end configuration of an antenna device 1000 for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure.

[0078] refer to Figure 3 The first excitation end 111 and the second excitation end 112 can be used as excitation ends for generating circularly polarized waves, and the third excitation end 113 can be used as an excitation end for generating polarized waves of the first excitation mode. The three excitation ends are at least partially located in the first cavity surrounded by the conductive cylinder array 140 and the short-circuit board 120. According to an embodiment of the present disclosure, the antenna device for realizing multi-excitation mode polarized waves is preferably based on Figure 3 For example, openings are formed on the conductive cylinder array 140 to extend each excitation end into the first cavity. Figure 3 Three openings are shown as an example, and those skilled in the art can appropriately adjust the number of openings to accommodate the number of excitation ends, all of which fall within the protection scope of the present disclosure.

[0079] For the antenna device 1000 for realizing multi-excitation mode polarized waves in the above-mentioned various embodiments, it is preferably also provided with a waveguide portion 150, wherein the first end of the waveguide portion 150 is connected to the second end of the conductive cylinder array 140, so that the polarized waves of each excitation mode transmitted through the conductive cylinder array 140 can be emitted through the waveguide portion 150.

[0080] Inspired by the technical solution of the present disclosure, those skilled in the art can adjust the type, shape, material, etc. of the waveguide portion 150, all of which fall within the protection scope of the present disclosure.

[0081] like Figures 5 to 7 As shown, according to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, the waveguide portion 150 is a cavity structure, and the shape of the first end portion (the lower end portion shown in the figure) of the waveguide portion 150 is the same as the shape of the second end portion (the upper end portion of the conductive cylinder array 140 shown in the figure) of the conductive cylinder array 140, so that the cavity of the first end portion of the waveguide portion 150 is the same shape as the first cavity surrounded by the conductive cylinder array 140.

[0082] refer to Figures 5 to 7 According to a preferred embodiment of the present disclosure, the cavity of the first end portion (ie, the lower half) of the waveguide portion 150 is parallel to the first cavity surrounded by the conductive cylinder array 140 .

[0083] Figures 5 to 7 , Fig.13 , Fig.15 Both show the configuration of the conductive cylinder array 140 and the waveguide portion 150 of the antenna device 1000 that realizes multi-excitation mode polarized waves. Figures 5 to 7 , Fig.13 , Fig.15 Preferably, the wall of the waveguide portion 150 has a thickness, and the inner diameter of the wall of the first end portion of the waveguide portion 150 is larger than the inner diameter of the conductive cylinder array 140 and smaller than the outer diameter of the conductive cylinder array 140, so that the waveguide portion 150 is superimposed on the conductive cylinder array to achieve the connection between the waveguide portion 150 and the conductive cylinder 141, thereby achieving the connection between the waveguide portion 150 and the short-circuit board 120 through the conductive cylinder 141.

[0084] Preferably, the second end portion (the upper end portion shown in the figure) of the waveguide portion 150 of the present disclosure is horn-shaped, referring to Fig.13 The outer wall surface of the waveguide portion 150 is a cylindrical surface, the lower part of the inner wall surface of the waveguide portion 150 is a cylindrical surface, and the upper part is a frustum surface, so as to form the waveguide portion 150 with a horn-shaped structure.

[0085] Figures 5 to 7 Both show the waveguide portion 150 of the antenna device 1000 for realizing multi-excitation mode polarized waves of the present disclosure, Fig.13A waveguide portion 150 having a flared shape according to one embodiment of the present disclosure is shown.

[0086] Among them, the waveguide part 150 disclosed in the present invention can be an external waveguide antenna, which is superimposed on the conductive cylinder array 140. The connection between the external waveguide antenna and the conductive cylinder 141 of the conductive cylinder array 140 is realized to connect the external waveguide antenna to the short-circuit surface 120 (ground layer) for transmitting circularly polarized waves, horizontally linear polarized waves and / or vertically linear polarized waves.

[0087] refer to Figures 5 to 7 , Fig.13 According to the preferred embodiment of the present disclosure, the antenna device 1000 for realizing multi-excitation mode polarized waves also includes a multilayer circuit board 160, which includes at least one signal layer 110, at least one ground layer 180 and at least one layer of insulating medium 130, wherein the short-circuit board 120 is arranged on one of the ground layers 180, and the multiple excitation ends are arranged on a common signal layer 110, or on multiple signal layers 110, and the ground layer 180 where the short-circuit board 120 is located is arranged below the signal layer 110 where the multiple excitation ends are located.

[0088] Figure 5 It is a schematic diagram of the longitudinal cross-sectional structure of an antenna device for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure.

[0089] refer to Figure 5 In this embodiment, the number of the signal layer 110 and the ground layer 180 (the short-circuit surface 120 is formed on the ground layer 180 ) are both one, and the various excitation terminals described above are configured on the same signal layer 110 .

[0090] Figure 6 It is a schematic diagram of the longitudinal cross-sectional structure of an antenna device for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure.

[0091] refer to Figure 6 In this embodiment, the number of signal layers 110 is two, and the number of ground layers 180 is one. Taking the excitation end for generating the polarized wave of the first excitation mode and the excitation end for generating the polarized wave of the second excitation mode as examples, the two excitation ends can be set on different signal layers, so that the two excitation ends have different distances from the ground layer 180 (short-circuit surface 120), generating polarized waves of different frequencies; the two excitation ends can also be set on the same signal layer, and the two excitation ends have the same distance from the ground layer 180 (short-circuit surface 120), but excitation signals of different frequencies and / or different amplitudes can be applied to the two excitation ends through the control of the radar RF transceiver module, so that the frequency and / or amplitude of the polarized wave of the first excitation mode and the polarized wave of the second excitation mode are different.

[0092] On this basis, one or / two excitation ends for generating polarized waves in the first excitation mode and one or two excitation ends for generating polarized waves in the second excitation mode can be optionally set on each signal layer 110. Each excitation end works independently to generate one or two horizontal linear polarized waves and a vertical linear polarized wave.

[0093] exist Figure 6 On the basis of the above, two excitation ends (for example, the first excitation end 111 and the second excitation end 112) for generating a third excitation mode polarized wave (circularly polarized wave) can also be set on a certain signal layer, and the two excitation ends are configured to be perpendicular to each other, and simultaneously emit signals of equal amplitude, equal frequency, and a phase difference of 90 degrees to generate circularly polarized waves. The excitation end for generating the first excitation mode polarized wave and / or the polarized wave excitation end for generating the second excitation mode are set on the same signal layer or different signal layers of the two excitation ends for generating the third excitation mode polarized wave (circularly polarized wave), so that circularly polarized waves, horizontal linear polarized waves, and / or vertical linear polarized waves can be generated.

[0094] Inspired by the technical solution of this embodiment, those skilled in the art can adjust the number of signal layers 110, the position of the signal layers, and the number of excitation ends to meet the distance requirements between each excitation end and the short-circuit surface 120, all of which fall within the protection scope of this disclosure.

[0095] According to the antenna device 1000 for realizing multi-excitation mode polarized waves in a preferred embodiment of the present disclosure, the signal layer 110 where multiple excitation ends are located is configured on the first circuit board layer of the multi-layer circuit board 160, and the short-circuit board 120 is configured on the second circuit board layer of the multi-layer circuit board 160. The part of the second circuit board layer surrounded by the conductive cylinder array 140 is completely filled with a metal layer (preferably a copper-clad layer) to form the short-circuit board 120.

[0096] According to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, the signal layer 110 where the multiple excitation ends are located is arranged on the surface layer (the upper surface layer shown in the figure) of the multi-layer circuit board 160, and the multi-layer circuit board 160 forms an excitation end exposed area.

[0097] In this embodiment, the signal layer 110 where the multiple excitation terminals are located is arranged on the surface layer of the multi-layer circuit board 160. Figures 13 to 15 The outer edge of the first end of the waveguide portion 150 is connected to the multilayer circuit board 160, and the inner edge of the first end of the waveguide portion 150 is in contact with the conductive cylinder array 140. An opening is opened at the corresponding position of the waveguide portion 150 corresponding to the signal transmission line 115 for connecting each excitation end, so that each excitation end can enter the first cavity described above.

[0098] Figure 7It is a schematic diagram of the longitudinal cross-sectional structure of an antenna device for realizing multi-excitation mode polarized waves according to another embodiment of the present disclosure.

[0099] refer to Figure 7 , two signal layers 110 are shown, and each of the excitation ends described above can be arranged on the second signal layer 110 from the top to the bottom.

[0100] Inspired by the technical solution of this embodiment, those skilled in the art can adjust the number of ground layers and / or Figure 7 Any adjustments made to the number of signal layers in the embodiment fall within the protection scope of the present disclosure.

[0101] For the antenna device 1000 for realizing multi-excitation mode polarized waves in the above-mentioned various embodiments, preferably, the conductive cylinder 141 is a via body, and the first end, the inner wall and the second end of the via body are all provided with a metal layer (preferably a copper clad layer), and the first end of the via body is in contact with the short-circuit surface 120.

[0102] Figure 4 FIG. 1 is a schematic structural diagram of a conductive cylinder 141 of an antenna device 1000 for realizing multi-excitation mode polarized waves according to an embodiment of the present disclosure. Figure 4 The conductive cylinder 141 is a via body, whose main body is made of non-conductive material, and a via hole is formed inside the main body to form the via body. The first end face, the inner wall and the second end face of the main body are all coated with copper.

[0103] For the antenna device 1000 for realizing multi-excitation mode polarized waves in each of the above-mentioned embodiments, preferably, an insulating medium (microwave signal transmission medium) is provided in the first cavity described above, see Figures 5 to 7 as well as Fig.13 .

[0104] The insulating medium is disposed between the short-circuit surface 120 and the signal layer 110 , and each of the excitation ends described above at least partially extends into the insulating medium.

[0105] According to some embodiments of the present disclosure, the insulating medium is preferably also disposed within the via hole of the via body and / or disposed in the peripheral space of the conductive cylinder array 140 .

[0106] According to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, the conductive cylinders 141 of the conductive cylinder array 140 are insulated from each other, the conductive cylinders 141 can be in close contact with each other, or preset gaps can be set, and the insulating gaps can be filled with insulating media.

[0107] The antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention needs to ensure that the corresponding signal layer 110 where the multiple excitation ends are located in the first cavity, except for the multiple excitation ends and the corresponding signal transmission lines, is all dielectric (insulating medium). At the same time, the portion between the corresponding signal layer 110 and the short-circuit surface 120 is also all dielectric (insulating medium). Fig.13 As shown, two excitation ends for generating polarized waves in the third excitation mode are arranged on the first circuit board layer, and the portion between the two excitation ends and the short-circuit surface 120 (exposed area of ​​the excitation ends) is filled with a microwave signal propagation medium (insulating medium), so that the microwave signals emitted by the two excitation ends can pass through the medium to reach the short-circuit surface 120, and interact with the short-circuit surface 120 to generate circularly polarized waves. The area between the two excitation ends and the short-circuit surface 120 can also be hollowed out as a hollow structure.

[0108] According to another preferred embodiment of the present disclosure, an antenna device 1000 for realizing multi-excitation mode polarized waves is as follows: Figure 7 As shown, the signal layer 110 where the multiple excitation terminals are located is arranged in the middle of the multi-layer circuit board 160, and the multi-layer circuit board 160 forms an excitation terminal exposed area.

[0109] In the antenna device 1000 for realizing multi-excitation mode polarized waves in this embodiment, the signal layer 110 where the multiple excitation ends are located is arranged in the middle of the multi-layer circuit board 160, so there is no need to open an opening at the corresponding position of the waveguide part 150 corresponding to the signal transmission line 115 for connecting the excitation end.

[0110] In this embodiment, it is also necessary to ensure that the corresponding signal layer 110 where the multiple excitation ends in the first cavity are located is a medium (insulating medium) except for the multiple excitation ends and the corresponding signal transmission lines, and the portion between the corresponding signal layer 110 and the short-circuit surface 120 is a medium (microwave signal transmission medium), so that the microwave signal emitted by the excitation end on the corresponding signal layer 110 can pass through the medium to reach the short-circuit surface 120. The area between the signal layer 110 and the short-circuit surface 120 can also be hollowed out as a hollow structure.

[0111] According to another preferred embodiment of the antenna device 1000 for realizing multi-excitation mode polarized waves of the present disclosure, one or more layers of insulating medium, one or more signal layers and / or one or more grounding layers are arranged between the corresponding signal layer 110 where the multiple excitation ends are located and the short-circuit surface 120, and the area surrounded by the conductive cylinder array 140 between the signal layer 110 where the multiple excitation ends are located and the short-circuit surface 120 is removed (for example, hollowed out into a hollow structure) or completely corroded into an insulating medium for the transmission of microwave signals.

[0112] According to another preferred embodiment of the antenna device 1000 for realizing multi-excitation mode polarized waves of the present disclosure, one or more layers of insulating medium, one or more signal layers and / or one or more ground layers are arranged between the corresponding signal layer 110 where the multiple excitation ends are located and the waveguide part 150, and the area surrounded by the conductive cylinder array 140 between the signal layer 110 where the multiple excitation ends are located and the waveguide part 150 is removed (for example, hollowed out into a hollow structure) or completely corroded into an insulating medium for the transmission of microwave signals.

[0113] The antenna device 1000 for realizing multi-excitation mode polarized waves in each of the above-mentioned embodiments further includes a radar RF transceiver module 200, which is used to output microwave signals to each excitation end and receive echo signals received by each excitation end.

[0114] The microwave signal generated by the radar RF transceiver module 200 may be a frequency modulated continuous wave, and the frequency range of the microwave signal is 24 GHz-200 GHz.

[0115] Figure 8 Schematic diagram of the structure of a radar radio frequency transceiver module 200 according to an embodiment of the present disclosure.

[0116] refer to Figure 8 The radar RF transceiver module 200 includes a main controller, a phase-locked loop, a frequency divider, a voltage-controlled oscillator, a first amplifier (power amplifier), an AD collector, an intermediate frequency amplifier, a mixer and a second amplifier (power amplifier).

[0117] like Figure 8 As shown, the main controller is connected to a phase-locked loop (PLL) and an AD collector, provides a base frequency to the phase-locked loop, and receives sampled data from the AD collector.

[0118] The phase-locked loop adjusts the output voltage to the voltage-controlled oscillator (VCO) according to the base frequency and the feedback frequency of the frequency divider. The voltage-controlled oscillator adjusts the output signal frequency and phase according to the voltage output by the phase-locked loop. The frequency divider divides the signal frequency output by the voltage-controlled oscillator and provides it to the phase-locked loop.

[0119] The frequency divider+voltage controlled oscillator+phase locked loop structure of the radar RF transceiver module 200 disclosed in the present invention can control the frequency and phase of the generated microwave signal.

[0120] The microwave signal finally generated by the voltage-controlled oscillator is amplified by the first amplifier and then output.

[0121] After receiving the echo signal, the antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention amplifies the echo signal through the second amplifier and then enters the mixer.

[0122] The mixer mixes the microwave signal generated by the radar RF transceiver module 200 with the received signal (echo signal) amplified by the second amplifier, obtains the intermediate frequency signal after amplification by the intermediate frequency amplifier, is sampled by the AD collector, and finally transmitted to the main controller for analysis, processing and calculation to obtain the measured object level value.

[0123] Each excitation end of the antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention can be directly connected to the transmitting and receiving paths of the radar RF transceiver module 200. The radar RF transceiver module 200 can also form a common end connected to the excitation end after merging the transceiver paths through a circulator / coupler.

[0124] Fig. 9 It is a schematic diagram of signal transmission and reception of an antenna device 1000 that realizes multi-excitation mode polarized waves according to an embodiment of the present disclosure.

[0125] like Fig. 9 As shown, the antenna device 1000 for realizing multi-excitation mode polarized waves in this embodiment preferably includes a signal gating module 300, and the signal gating module 300 is preferably a signal gating module 300 based on multiple switch devices.

[0126] The gating module 300 performs gating based on the control signal of the main controller to select which excitation end or ends the generated microwave signal is transmitted to, so as to achieve the required polarization mode and generate the required polarized wave.

[0127] The microwave signal generated by the radar RF transceiver module 200 can be transmitted to multiple excitation ends at the same time (the switches must be closed or opened at the same time), or it can be transmitted to different excitation ends at preset time intervals (the switches are closed or opened at preset time intervals according to the control signal of the main controller).

[0128] The antenna device 1000 for realizing multi-excitation mode polarized waves of this embodiment needs to be Figure 8 A power divider is provided at the signal output end (after the first amplifier) ​​of the radar RF transceiver module 200 shown in the figure to divide the microwave signal generated by the radar RF transceiver module 200 into multiple microwave signals for transmission to each excitation end respectively.

[0129] Fig. 9Two excitation ends (third excitation end 113 and fourth excitation end 114) are shown as examples. The two excitation ends transmit signals to the radar RF transceiver module 200 via the circulator / coupler 170, respectively. The two excitation ends can work independently to generate polarized waves in the first excitation mode and polarized waves in the second excitation mode; the two excitation ends can also be configured to work in coordination with each other, the two excitation ends are perpendicular to each other, and both simultaneously transmit excitation signals with the same signal amplitude, the same frequency and a phase difference of 90 degrees, to generate polarized waves in the third excitation mode.

[0130] Fig.10 It is a schematic diagram of signal transmission and reception of an antenna device 1000 that realizes multi-excitation mode polarized waves according to another embodiment of the present disclosure.

[0131] Fig.10 In the figure, the first excitation end 111 and the second excitation end 112 serve as excitation ends for generating the third excitation mode polarized wave (circularly polarized wave), and the third excitation end 113 and the fourth excitation end 114 serve as excitation ends for generating the first excitation mode polarized wave (horizontally linearly polarized wave) and generating the second excitation mode polarized wave (vertically linearly polarized wave), respectively.

[0132] According to another embodiment of the present disclosure, an antenna device 1000 for realizing multi-excitation mode polarized waves includes a plurality of radar RF transceiver modules 200 , and each radar RF transceiver module 200 corresponds to an excitation end (excitation end group).

[0133] According to another embodiment of the present disclosure, an antenna device 1000 for realizing multi-excitation mode polarized waves includes multiple radar RF transceiver modules 200, each of which corresponds to one excitation end (excitation end group) or multiple excitation ends (excitation end groups).

[0134] When a certain radar RF transceiver module 200 corresponds to two excitation terminals (excitation terminal groups), the signal gating module 300 described above is configured and will not be described in detail here.

[0135] The excitation end group described above is, for example, a first excitation end 111 and a second excitation end 112 for generating a polarized wave (circularly polarized wave) in the third excitation mode.

[0136] Fig.11 and Fig.12 A schematic diagram of signal transmission and reception of an antenna device 1000 for realizing multi-excitation mode polarized waves according to different embodiments of the present disclosure is shown.

[0137] For the antenna device 1000 for realizing multi-excitation mode polarized waves in the above-mentioned various embodiments, preferably, the circulator / coupler 170 includes a four-port coupler, and the four-port coupler is explained by taking the cooperation method of the four-port coupler with the first excitation end 111 and the second excitation end 112 for generating circularly polarized waves as an example.

[0138] Fig.16 FIG. 1 is a schematic diagram showing the structure of a four-port coupler according to an embodiment of the present disclosure. Fig.16 The first port and the fourth port of the four-port coupler 170 are respectively connected to the transmitting end and the receiving end of the radar RF transceiver module 200, the second port of the four-port coupler 170 is connected to the first excitation end 111, and the third port of the four-port coupler 170 is connected to the second excitation end 112. The four-port coupler 170 can generate a first excitation signal and a second excitation signal based on the microwave signal transmitted by the radar RF transceiver module 200.

[0139] Among them, Fig.14 As shown, the second port of the four-port coupler 170 is connected to the first excitation end 111 via the signal transmission line 115 , and the third port of the four-port coupler 170 is connected to the second excitation end 112 via the signal transmission line 115 .

[0140] The radar RF transceiver module 200 may be configured on the multi-layer circuit board 160 , or may be configured on other circuit boards other than the multi-layer circuit board 160 .

[0141] According to the antenna device 1000 for realizing multi-excitation mode polarized waves of the preferred embodiment of the present disclosure, the four-port coupler 170 described above performs gain processing on the echo signals received by the first excitation end 111 and the second excitation end 112 to generate gain-processed echo signals for processing by the radar RF transceiver module 200.

[0142] According to a preferred embodiment of the present disclosure, the waveguide portion 150 described above is in close contact with the surface of the multilayer circuit board 160 to transmit the generated polarized wave to the outside and receive the echo signal generated after the polarized wave encounters the object to be tested.

[0143] The waveguide portion 150 may be provided with screw holes, and the multilayer circuit board 160 may be provided with openings, and the multilayer circuit board 160 and the waveguide portion 150 may be fixedly connected by screws. Those skilled in the art may also use other connection methods to connect the waveguide portion 150 and the multilayer circuit board 160, all of which fall within the protection scope of the present disclosure.

[0144] Preferably, the signal transmission line 115 and the circulator / coupler 170 described above are both disposed on the signal layer 110 described above.

[0145] Combined with the following Fig.14 and Fig.16 The working process of the four-port coupler of the antenna device 1000 for realizing multi-excitation mode polarized waves disclosed in the present invention is described in detail.

[0146] Fig.16 In the embodiment, end A is the first port, end B is the second port, end C is the third port, and end D is the fourth port.

[0147] The working principle of the four-port coupler is as follows:

[0148] When the signal is input from the A end, the D end is the isolation end, the B end outputs 1 / 2 signal, and the C end outputs 1 / 2 signal. The signal amplitudes output from the B end and the C end are the same, but the phase difference between the signals output from the B end and the C end is 90 degrees.

[0149] When the signal is input from the D terminal, the A terminal is the isolation terminal, the C terminal outputs 1 / 2 signal, and the B terminal outputs 1 / 2 signal. The signal amplitudes output from the C terminal and the B terminal are the same, but the phase difference between the signals output from the C terminal and the B terminal is 90 degrees.

[0150] When the signal is input from the B terminal, the C terminal is the isolation terminal, the A terminal outputs 1 / 2 signal, and the D terminal outputs 1 / 2 signal. The signal amplitudes output from the A terminal and the D terminal are the same, but the phase difference between the signals output from the A terminal and the D terminal is 90 degrees.

[0151] When the signal is input from the C terminal, the B terminal is the isolation terminal, the D terminal outputs 1 / 2 signal, and the A terminal outputs 1 / 2 signal. The signal amplitudes output from the D terminal and the A terminal are the same, but the phase difference between the signals output from the D terminal and the A terminal is 90 degrees.

[0152] The present disclosure connects the transmitting end of the radar RF transceiver module 200 to the A end of the four-port coupler, connects the receiving end of the radar RF transceiver module 200 to the D end of the four-port coupler, connects the B end and the C end to two excitation ends (the first excitation end and the second excitation end), respectively, and two microwave signals with the same signal amplitude and a phase difference of 90 degrees are emitted from the two mutually perpendicular excitation ends to form a circularly polarized beam, which is transmitted outward through the waveguide part 150 described above. The specific principle is as follows:

[0153] When a signal is input from end A, the signal output from end A is the sum of the signal from end A directly to end D and the signal from end A through B→C→D. Because the A→D channel and the A→B→C→D channel differ by an odd number of 1 / 2 wavelengths, their phases are opposite and the sum is 0, so the signal input from end A and output from end D is 0.

[0154] When the signal is input from the A terminal, the output signal from the B terminal is the sum of the two signals VB(A→B), which is the signal from the A terminal directly to the B terminal and the signal from A through D→C→B.

[0155] When the signal is input from the A terminal, the output signal from the C terminal is the sum of the two signals A→B→C and A→D→C, VC(A→C).

[0156] The four-port coupler can ensure that the amplitudes of signals VB (A→B) and VC (A→C) are the same and the phase difference is 90°.

[0157] When the emitted polarized wave encounters the object to be tested, an echo signal is formed, which is also transmitted through the waveguide 150 and received by the B and C ends of the four-port coupler, and output from the D end to the receiving end of the radar RF transceiver module 200, thereby achieving signal gain. The specific principle is as follows:

[0158] When two signals with a phase difference of 90° are input to the B and C terminals, that is, VB'(0°) is input to the B terminal and VC'(90°) is input to the C terminal, and the amplitudes of VB'(0°) and VC'(90°) are the same. When V(0°) is input to the B terminal alone and VC'(90°) is not input to the C terminal, the A terminal outputs VA'(α+0°), where α is the phase delay; and the D terminal outputs VD'(α+90°).

[0159] When VC'(90°) is input to the C terminal alone and V(0°) is not input to the B terminal, the D terminal outputs VD" (α+90°) and the A terminal outputs VA" (α+180°).

[0160] Therefore, when VB'(0°) is input to the B terminal and VC'(90°) is input to the C terminal at the same time, and the amplitudes of VB'(0°) and VC'(90°) are the same, the output of the A terminal is VA'(α+0°)+VA" (α+180°)=0; the output of the D terminal is VD'(α+90°)+VD" (α+90°)=2*V(α+90°). That is, the signal gain is achieved.

[0161] According to the antenna device 1000 for realizing multi-excitation mode polarized waves according to the preferred embodiment of the present disclosure, the polarized waves of the first excitation mode and the polarized waves of the second excitation mode have different beam angles.

[0162] According to another preferred embodiment of the present disclosure, in an antenna device 1000 for realizing multi-excitation mode polarized waves, the polarized waves in the third excitation mode have different beam angles from the polarized waves in the first excitation mode and / or the polarized waves in the second excitation mode.

[0163] When the antenna device for realizing multi-excitation mode polarized waves disclosed in the present invention is used for level measurement, different polarized wave beams emitted have different beam angles, and there will be echo signals of different amplitudes for interfering objects on the container wall, but the echo signal amplitudes for the target reflector (liquid level) are often consistent.

[0164] refer to Fig.17and Fig.18 , two or more polarized wave beams with different beam angles can be used, especially by generating microwave signals in multiple frequency bands to generate multiple polarized wave beams, to obtain an echo curve that can only be obtained with an extremely small beam angle, and remove the interfering echo signal.

[0165] According to one method of the present disclosure, referring to Fig.18 , taking the case where the beam angle of the first beam is smaller than the beam angle of the second beam as an example, the echo signal curve of the first beam is marked as A, and the echo signal curve of the second beam is marked as B, and the two curves are subtracted, that is, BA*K1, where K1 is a parameter related to the beam angle difference, which can be a constant, can be set according to the angle difference of the two beams, and can also be adjusted according to the actual situation of the material storage device to be tested. Then BA*K1 obtains the interference echo signal curve after removing the target echo signal (that is, the real echo signal of the material to be tested).

[0166] After that, the following processing is performed: B-(BA*K1)*K2, that is, the interference echo signal is removed from the small open angle echo signal curve to obtain the target echo signal. Among them, K2 is also a parameter related to the beam angle difference, which can be a constant and can be set / adjusted based on the actual situation of the material storage device being tested on site.

[0167] According to another method disclosed in the present invention, the signal height (signal amplitude) of the interference echo of the echo signal curves of the two beams is obtained, and then the amplitude of one of the two echo signal curves A and B is adjusted so that the amplitudes of the interference echo signals of the two echo signal curves are the same. For example, if the B curve is multiplied by K1, the interference echo of K1*B has the same amplitude as the interference echo of the A curve, and then the difference between the two curves with the same interference echo amplitude is taken: AB*K1, so as to obtain a curve with only the target object echo signal, and then the curve without the interference echo signal is appropriately amplified to obtain K2*(AB*K1), wherein K1 and K2 are parameters related to the difference in beam angles of the two beams, and can be set / adjusted based on the actual situation of the material storage device under test on site.

[0168] The antenna device for realizing multi-excitation mode polarized waves disclosed in the present invention has a simple structure, is easy to process, and can generate various polarized waves to cope with different measurement scenarios and working conditions.

[0169] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0170] In addition, the terms "first" and "second" 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" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0171] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. An antenna device for realizing multi-excitation mode polarized waves, characterized in that: include: A short-distance road surface, wherein the short-distance road surface is entirely made of metal surfaces; Excitation ends, the number of which is plural and which are arranged on the signal layer, and are used to output excitation signals. The multiple excitation signals output by the multiple excitation ends can interact with the short-circuit surface to form polarized waves of multiple excitation modes; as well as A conductive cylinder array, wherein the conductive cylinder array comprises a plurality of conductive cylinders parallel to each other, the conductive cylinders extend in a direction perpendicular to the short-circuit surface, the plurality of conductive cylinders and the short-circuit surface form a first cavity, and the first end of the conductive cylinder array contacts the short-circuit surface, wherein the plurality of excitation ends comprise a first excitation end and a second excitation end, the first excitation end and the second excitation end are both at least partially within the first cavity, the first excitation signal output by the first excitation end can interact with the short-circuit surface to generate a polarized wave of a first excitation mode, and the second excitation signal output by the second excitation end can interact with the short-circuit surface to generate a polarized wave of a second excitation mode; The first excitation end and the second excitation end are arranged on the same signal layer and simultaneously output two excitation signals of the same frequency and amplitude. The two excitation signals simultaneously interact with the short-circuit surface to generate a polarized wave of a third excitation mode. The polarized wave of the third excitation mode can be transmitted through the conductive cylinder array. The two excitation signals have a phase angle difference, and an excitation end angle is formed between the first excitation end and the second excitation end, so that the phase angle difference is equal to the excitation end angle and both are 90 degrees.

2. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: It also includes a multi-layer circuit board, which includes at least one signal layer, at least one ground layer and at least one layer of insulating medium, wherein the short-circuit surface is arranged on a certain ground layer, and the ground layer where the short-circuit surface is located is arranged below the signal layer where the multiple excitation ends are located.

3. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The excitation signal corresponding to the polarized wave of the first excitation mode and the excitation signal corresponding to the polarized wave of the second excitation mode are configured to be generated simultaneously or at a predetermined time interval.

4. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The insertion direction of the first excitation end and / or the second excitation end can be adjusted.

5. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The polarized wave of the first excitation mode and the polarized wave of the second excitation mode have different beam angles.

6. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The multiple excitation ends also include a third excitation end and / or a fourth excitation end, the third excitation end is used to output a third excitation signal and / or the fourth excitation end is used to output a fourth excitation signal, the third excitation signal interacts with the short-circuit surface to generate a polarized wave of a first excitation mode and / or the fourth excitation signal interacts with the short-circuit surface to generate a polarized wave of a second excitation mode, and the polarized wave of the first excitation mode and / or the polarized wave of the second excitation mode can be transmitted via the conductive cylinder array.

7. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The excitation signal corresponding to the polarized wave of the third excitation mode has the same or different signal frequency and the same or different signal amplitude as the excitation signal corresponding to the polarized wave of the first excitation mode and / or the excitation signal corresponding to the polarized wave of the second excitation mode.

8. The antenna device for realizing multi-excitation mode polarized waves according to claim 6, characterized in that: The first excitation end and the second excitation end are arranged on different signal layers from the third excitation end and / or the fourth excitation end, so that the distance between the first excitation end and the second excitation end and the short-circuit surface is different from the distance between the third excitation end and / or the fourth excitation end and the short-circuit surface, so as to obtain polarized waves of different frequencies.

9. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The excitation signal corresponding to the polarized wave of the third excitation mode and the excitation signal corresponding to the polarized wave of the first excitation mode and / or the excitation signal corresponding to the polarized wave of the second excitation mode are configured to be generated simultaneously or at a predetermined time interval.

10. The antenna device for realizing multi-excitation mode polarized waves according to claim 6, characterized in that: The insertion direction of the first excitation end, the second excitation end, the third excitation end and / or the fourth excitation end can be adjusted.

11. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The polarized wave of the third excitation mode has a different beam angle from the polarized wave of the first excitation mode and / or the polarized wave of the second excitation mode.

12. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: It also includes a waveguide portion, a first end of which is connected to the second end of the conductive cylinder array, so that polarized waves of each excitation mode transmitted through the conductive cylinder array can be emitted through the waveguide portion.

13. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The short-circuit surface is a copper-clad layer.

14. The antenna device for realizing multi-excitation mode polarized waves according to claim 1, characterized in that: The conductive cylinder is a via body, a first end portion, an inner wall portion and a second end portion of the via body are all provided with a metal layer, and the first end portion of the via body is in contact with the short-circuit surface.

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