Road nondestructive testing system

Abstract

The invention provides a road nondestructive testing system, which comprises an antenna module, a radio frequency transceiver module and a signal processing module, and is characterized in that the antenna module is used for transmitting an electromagnetic wave detection signal to a target road and receiving an electromagnetic wave echo signal reflected by the target road; the radio frequency transceiver module is respectively connected with the antenna module and the signal processing module, and is used for modulating a detection signal of the signal processing module into an electromagnetic wave detection signal and transmitting the electromagnetic wave detection signal to the antenna module; an electromagnetic echo signal received by the antenna module is demodulated into a feedback signal, and the feedback signal is transmitted to the signal processing module; and the signal processing module is used for generating a detection signal aiming at the target road, receiving the feedback signal and generating a disease detection result of the target road according to the feedback signal.

Description

Technical Field

[0001] The present disclosure belongs to the field of radio frequency technology, and in particular relates to a road non-destructive testing system. Background Art

[0002] With the continued growth of highway mileage, the market for maintenance and inspection is also expanding. By 2023, my country will have 5.4368 million kilometers of highway mileage, of which approximately 89% have been in operation for more than five years and are entering a peak period of maintenance and repair. Due to the unique topography and geology of the western mountainous areas, natural disasters are more frequent, particularly landslides, mudslides, and earthquakes, which pose a serious threat to the smooth flow of transportation and the safety of life and property of local residents. Therefore, it is necessary to accelerate the research and development of road safety inspection and maintenance equipment, and prevent disasters through safety inspections and intelligent management and control. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art and provide a road nondestructive testing system.

[0004] The present disclosure provides a road nondestructive testing system, which includes an antenna module, a radio frequency transceiver module and a signal processing module, wherein:

[0005] The antenna module is used to transmit an electromagnetic wave detection signal to a target road and receive an electromagnetic wave echo signal reflected by the target road;

[0006] The RF transceiver module is connected to the antenna module and the signal processing module respectively, and is used to modulate the detection signal of the signal processing module into an electromagnetic wave detection signal and transmit it to the antenna module, and demodulate the electromagnetic echo signal received by the antenna module into a feedback signal and transmit it to the signal processing module;

[0007] The signal processing module is used to generate a detection signal for the target road, receive the feedback signal, and generate a disease detection result for the target road according to the feedback signal.

[0008] The antenna module includes at least one antenna, and the antenna includes:

[0009] A dielectric substrate comprising a first surface and a second surface disposed opposite to each other along a thickness direction thereof;

[0010] A radiation patch and a feed line are provided on the first surface, the radiation patch has a first opening extending through the thickness thereof, and the feed line is electrically connected to the radiation patch;

[0011] A reference electrode layer is provided on the second surface and includes a main body, a connecting portion, and a coupling portion; the main body is electrically connected to the coupling portion through the connecting portion, the coupling portion and the orthographic projection of the first opening on the dielectric substrate at least partially overlap, the coupling portion is coupled to the radiation layer, and the main body and the orthographic projection of the feed line on the dielectric substrate at least partially overlap.

[0012] The outer contour of the first opening is composed of arc segments that are convex outward in a direction away from the center of the first opening and are connected in sequence.

[0013] The outer contour of the first opening is composed of arc segments connected in sequence and convex in a direction away from the center of the first opening; the orthographic projection of the first opening on the dielectric substrate completely covers the orthographic projection of the coupling portion on the dielectric substrate.

[0014] Wherein, the outer contour of the first opening is circular.

[0015] Wherein, the outer contour of the first opening is elliptical.

[0016] Wherein, the ellipse has an axis ratio of 1.3 to 1.7.

[0017] In which, the radiation patch includes a radiation main part and a radiation auxiliary part, the radiation auxiliary part surrounds the radiation main part, and there is a gap between the radiation auxiliary part and the radiation main part; the feeder is electrically connected to the radiation main part and the radiation auxiliary part; the first opening passes through the radiation main part along the thickness direction of the radiation main part.

[0018] The main body has a plurality of sequentially connected side edges, the main body has a second opening extending through the main body along its thickness direction, and the second opening extends through the first side edge of the main body; the orthographic projection of the feed line on the dielectric substrate at least partially overlaps with the orthographic projection of the second opening on the dielectric substrate.

[0019] The outer contour of the second opening includes a first line segment and a second line segment intersecting the first side, and a third line segment connecting the first line segment and the second line segment.

[0020] The connecting portion includes a first sub-segment connected to the main body portion, a second sub-segment connected to the coupling portion, and a third sub-segment connecting the first sub-segment and the second sub-segment; the first sub-segment and the third sub-segment form a first angle, and the second sub-segment and the third sub-segment form a second angle.

[0021] The antenna module includes a plurality of antennas, which are arranged in an array and are respectively connected to the radio frequency transceiver module.

[0022] The RF transceiver module is further used to modulate the detection signal of the signal processing module into an electromagnetic wave detection signal having a first frequency or a second frequency, and transmit the electromagnetic wave detection signal having the first frequency or the second frequency to the antenna module, wherein the first frequency is different from the second frequency.

[0023] Wherein, the first frequency range is 0.5GHz~6.1GHz and 6.4GHz~10GHz;

[0024] The second frequency ranges from 0.5 GHz to 6.1 GHz and from 6.4 GHz to 10 GHz. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the road nondestructive testing system disclosed in the present invention;

[0026] Figure 2 A schematic diagram of a road nondestructive testing system disclosed herein monitoring a road;

[0027] Figure 3 A schematic diagram of the road nondestructive testing system disclosed herein detecting road damage;

[0028] Figure 4 A top perspective view of an antenna according to a first example of the present disclosure;

[0029] Figure 5 Schematic top view of a radiation patch of an antenna according to a first example of the present disclosure;

[0030] Figure 6 A top perspective view of a reference electrode layer of an antenna according to a first example of the present disclosure;

[0031] Figure 7 for Figure 4 The S of the antenna shown 11 curve chart;

[0032] Figure 8 A schematic diagram of an arrangement of multiple antennas in an antenna module according to an example of the present disclosure;

[0033] Figure 9 for Figure 8 The antenna module shown in S 11 curve chart;

[0034] Figure 10 This is a schematic diagram of an arrangement of multiple antennas in an antenna module according to another example of the present disclosure;

[0035] Figure 11 for Figure 10 The antenna module shown in S 11curve chart;

[0036] Figure 12 A top perspective view of an antenna according to a second example of the present disclosure;

[0037] Figure 13 for Figure 12 The S of the antenna shown 11 curve chart;

[0038] Figure 14 A top perspective view of an antenna according to a third example of the present disclosure;

[0039] Figure 15 for Figure 14 The S of the antenna shown 11 curve chart;

[0040] Figure 16 A top perspective view of an antenna according to a fourth example of the present disclosure;

[0041] Figure 17 for Figure 16 The S of the antenna shown 11 curve chart;

[0042] Figure 18 A top perspective view of an antenna according to a fifth example of the present disclosure;

[0043] Figure 19 for Figure 18 The S of the antenna shown 11 curve chart. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0045] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0046] Road defects include not only cracks, deformations, and damage on the road surface, but also internal voids, uneven pier settlement and bearing slippage in bridge structures, and cracking, spalling, and shedding of tunnel linings. Nondestructive road testing technologies typically include image recognition, 3D laser, and phased-control ultrasound. Image recognition can only detect road surface defects and is incapable of detecting them in low-light conditions such as fog or at night. 3D laser can only detect protrusions and depressions, and this technology is also significantly affected by fog and light. Phased-control ultrasound can infer internal road surface defects through echoes, with a detection depth of approximately two meters, but detection speed is very slow. Furthermore, road testing equipment requires on-site manual operation and can only be carried out via vehicle-mounted inspections, making it impossible to provide 24 / 7 monitoring. Especially in critical sections where natural disasters frequently occur, such as landslide sections, earthquake zones, and bridge and tunnel sections, traditional road inspection equipment cannot be used for long-term monitoring and data collection.

[0047] In view of this, the present disclosure provides a road non-destructive testing system 1, which is not affected by light visibility, can not only perform all-weather monitoring of road surface defects such as bumps, depressions and cracks, but also conduct in-depth detection of a single defect, and can be especially used in critical road sections where natural disasters frequently occur.

[0048] like Figure 1 As shown, the present disclosure provides a road non-destructive testing system 1, which includes an antenna 100 module, a radio frequency transceiver module 20, and a signal processing module 30. The antenna 100 module is used to transmit an electromagnetic wave detection signal to a target road and receive an electromagnetic wave echo signal reflected by the target road; the radio frequency transceiver module 20 is connected to the antenna 100 module and the signal processing module 30, respectively, and is used to modulate the detection signal of the signal processing module 30 into an electromagnetic wave detection signal and transmit it to the antenna 100 module, and demodulate the electromagnetic echo signal received by the antenna 100 module into a feedback signal and transmit it to the signal processing module 30; the signal processing module 30 is used to generate a detection signal for the target road, receive the feedback signal, and generate a disease detection result for the target road based on the feedback signal.

[0049] The road nondestructive testing system 1 disclosed herein generates a detection signal for a target road by a signal processing module 30, modulates the detection signal into an electromagnetic wave detection signal through a radio frequency transceiver module 20, and transmits the electromagnetic wave detection signal to an antenna module 100, which sends the electromagnetic wave detection signal to the target road; the electromagnetic wave detection signal is reflected on the target road to form an electromagnetic wave echo signal, which carries road disease information; the antenna module 100 receives the electromagnetic wave echo signal reflected by the target road and transmits the electromagnetic wave echo signal to the radio frequency transceiver module 20, which demodulates the electromagnetic wave echo signal into a feedback signal and transmits the feedback signal to the signal processing module 30, which generates a disease detection result for the target road based on the feedback signal.

[0050] When the road nondestructive testing system 1 disclosed herein is used to monitor or detect a target road, road defects are monitored and detected through electromagnetic waves, which is not affected by light visibility. Effective monitoring and detection of road defects can be achieved even on foggy or rainy days. Not only defects on the road surface but also defects inside the road surface can be monitored and detected.

[0051] The road nondestructive testing system 1 disclosed herein can be set up near a target road, especially in a critical section where natural disasters occur frequently, without requiring human on-site operation, to achieve all-weather monitoring and testing of the target road. Figure 2 As shown, the road nondestructive testing system 1 of the present disclosure is set outside the target road, which can quickly scan the target road over a large area to infer the points where there may be major hidden dangers underground, without hindering the road from being open to traffic, and can also achieve all-weather monitoring of the target road. Figure 3 As shown, for a defect on the target road, deep and accurate underground detection can be carried out to obtain detailed data of the defect.

[0052] As the amount of collected data continues to increase, the collected data can be used to train prediction models. The prediction model can be a model that predicts the possibility of damage to pavement structures, bridge structures, and tunnel structures. Based on the prediction results, early warning can be issued to buy valuable time for taking preventive or remedial measures and avoid accidents.

[0053] In some examples, the antenna 100 module can be used as a transmitting antenna 100 or as a receiving antenna 100. The antenna 100 module can be a MIMO (Multiple-Input Multiple-Output) antenna 100, a phased array antenna 100, a parabolic antenna 100, or other antennas 100 with electromagnetic wave scanning capabilities. The antenna 100 module may include at least one antenna 100, and the antenna 100 may have various structures, which are not specifically limited here. In the case where the antenna 100 module includes multiple antennas 100, the multiple antennas 100 can be arranged in an array and respectively connected to the RF transceiver module 20, wherein the RF transceiver module 20 can include multiple RF transceivers, and at least some of the antennas 100 are connected to the same RF transceiver.

[0054] In some examples, the RF transceiver module 20 is also used to modulate the detection signal of the signal processing module 30 into an electromagnetic wave detection signal having a first frequency or a second frequency, and transmit the electromagnetic wave detection signal having the first frequency or the second frequency to the antenna 100 module, where the first frequency is different from the second frequency.

[0055] When detecting road defects, electromagnetic waves in higher frequency bands have higher resolution and higher-definition imaging, while electromagnetic waves in lower frequency bands have greater penetration and travel farther underground. When using the disclosed road nondestructive testing system 1 for road monitoring, electromagnetic waves in higher frequency bands can be emitted to clearly image road conditions. When detecting road defects, electromagnetic waves in lower frequency bands can be emitted to detect road defects deeper underground and obtain detailed data on the defects.

[0056] In some examples, the first frequency ranges from 0.5 GHz to 6.1 GHz and from 6.4 GHz to 10 GHz; the second frequency ranges from 0.5 GHz to 6.1 GHz and from 6.4 GHz to 10 GHz. The first frequency can be greater than the second frequency, for example, the first frequency is 6.0 GHz and the second frequency is 1.5 GHz, the first frequency is 4.9 GHz and the second frequency is 1.3 GHz, and so on. The first frequency can also be less than the second frequency, which is not specifically limited here.

[0057] In some examples, the RF transceiver module 20 includes a modulation circuit, a transmitting circuit, a receiving circuit, and a demodulation circuit. After the transmitting circuit receives the detection signal provided by the signal processing module 30, the modulation circuit modulates the detection signal and then transmits it to the antenna 100 module. The antenna 100 module transmits the received electromagnetic wave echo signal to the receiving circuit. The receiving circuit transmits the electromagnetic wave echo signal to the demodulation circuit. The demodulation circuit demodulates the electromagnetic wave echo signal and transmits it to the signal processing module 30.

[0058] In some examples, the road nondestructive testing system 1 of the present disclosure further includes a signal amplifier, a power amplifier, and a filter. The RF transceiver module 20 is connected to the signal amplifier and the power amplifier, which are connected to the filter, which is connected to the antenna 100 module.

[0059] During the process of the antenna 100 module transmitting the electromagnetic wave detection signal, the signal amplifier is used to increase the power of the electromagnetic wave signal output by the RF transceiver module 20 and transmit it to the filter. The power amplifier is used to amplify the power of the electromagnetic wave signal output by the RF transceiver module 20 and transmit it to the filter. The filter includes a duplexer and a filter circuit. The filter combines the electromagnetic wave signals output by the signal amplifier and the power amplifier and filters out the clutter before transmitting them to the antenna 100 module. The antenna 100 module radiates the signal. During the process of the antenna 100 module receiving the electromagnetic wave echo signal, the antenna 100 module transmits the received electromagnetic wave echo signal to the filter. The filter filters out the clutter from the electromagnetic wave echo signal and transmits it to the signal amplifier and the power amplifier. The signal amplifier amplifies the signal received by the antenna 100 module to increase the signal-to-noise ratio. The power amplifier amplifies the power of the signal received by the antenna 100 module. The electromagnetic wave signal received by the antenna 100 module is processed by the power amplifier and the signal amplifier and transmitted to the RF transceiver module 20. The RF transceiver module 20 then transmits it to the signal processing module 30. There are many types of signal amplifiers, such as low noise amplifiers.

[0060] In some examples, the road nondestructive testing system 1 of the present disclosure further includes a power management unit, which is connected to a power amplifier and provides the power amplifier with a voltage for amplifying a signal.

[0061] Next, the structure of the antenna 100 in the antenna 100 module of the road non-destructive testing system 1 of the present disclosure is described in detail through several examples, but this does not constitute a limitation to the present disclosure.

[0062] First example

[0063] like Figure 4 、 Figure 5 and Figure 6As shown, the antenna 100 includes a dielectric substrate 110 , a radiation patch 120 , a feed line 130 and a reference electrode layer 140 . The dielectric substrate 110 includes a first surface and a second surface disposed opposite each other along its thickness direction. A radiating patch 120 and a feed line 130 are disposed on the first surface of the dielectric substrate 110. The radiating patch 120 has a first opening 121 extending through its thickness direction. The outer contour of the first opening 121 is composed of sequentially connected arc segments convex outwardly in a direction away from the center of the first opening 121. The feed line 130 is electrically connected to the radiating patch 120. A reference electrode layer 140 is disposed on the second surface of the dielectric substrate 110. The reference electrode layer 140 includes a main portion 141, a connecting portion 143, and a coupling portion 142. The main portion 141 is electrically connected to the coupling portion 142 via the connecting portion 143. The orthographic projections of the coupling portion 142 and the first opening 121 of the radiating patch 120 on the dielectric substrate 110 at least partially overlap. The coupling portion 142 is coupled to the radiating layer. The orthographic projections of the main portion 141 and the feed line 130 on the dielectric substrate 110 at least partially overlap.

[0064] In the antenna 100 of this example, the feed line 130 is electrically connected to the radiation patch 120, and the electromagnetic wave detection signal is transmitted to the radiation patch 120 through the feed line 130. The radiation patch 120 has a first opening 121 that runs through the radiation patch 120 along its thickness direction. The reference electrode layer 140 includes a main body 141, a coupling portion 142, and a connecting portion 143 connecting the main body 141 and the coupling portion 142. The coupling portion 142 is coupled to the radiation layer. Through the coupling method, it is beneficial to increase the bandwidth of the antenna 100 and realize a wide-band antenna 100. The outer contour of the first opening 121 on the radiating patch 120 is composed of arc segments that are convex in a direction away from the center of the first opening 121 and are connected in sequence, which is conducive to achieving good impedance matching between the radiating patch 120 and the reference electrode layer 140, thereby facilitating a larger impedance bandwidth of the antenna 100; the main body 141 of the reference electrode layer 140 and the orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlap, which is conducive to reducing the transmission loss of the feed line 130 and improving the signal stability of the feed line 130.

[0065] In some examples, such as Figure 5 As shown, the outer contour of the radiation patch 120 is circular. In other examples, the outer contour of the radiation patch 120 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0066] In some examples, such as Figure 6 As shown, the outer contour of the coupling portion 142 of the reference electrode layer 140 is circular. In other examples, the outer contour of the coupling portion 142 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0067] In some examples, such as Figure 6As shown, the main body 141 of the reference electrode layer 140 has a plurality of sequentially connected side edges. The main body 141 has a second opening 1411 extending through the main body 141 along its thickness direction. The second opening 1411 extends through the first side edge 1412 of the main body 141 . The orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlaps with the orthographic projection of the second opening 1411 on the dielectric substrate 110 .

[0068] By providing the second opening 1411 on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0069] In some examples, the main body 141 of the reference electrode layer 140 has a plurality of sides connected in sequence, for example, Figure 6 As shown, the main body 141 of the reference electrode layer 140 has four sequentially connected sides, and the outer contour of the main body 141 is rectangular. In other examples, the main body 141 of the reference electrode layer 140 may have three, five, or six sequentially connected sides, etc., which are not specifically limited here.

[0070] In some examples, such as Figure 6 As shown, the first side 1412 of the main body 141 of the reference electrode layer 140 is the side closest to the orthographic projection of the radiating patch 120 on the dielectric substrate 110 in the orthographic projection of the main body 141 on the dielectric substrate 110. In other examples, the first side 1412 of the main body 141 of the reference electrode layer 140 may also be other sides, which are not specifically limited here.

[0071] In some examples, such as Figure 6 As shown, the outer contour of the second opening 1411 on the main body 141 of the reference electrode layer 140 includes a first line segment 1411a and a second line segment 1411b intersecting the first side 1412, and a third line segment 1411c connecting the first line segment 1411a and the second line segment 1411b. The second opening 1411 is a U-shaped opening.

[0072] By providing a U-shaped opening on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for further increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0073] In some examples, such as Figure 6As shown, the connecting portion 143 of the reference electrode layer 140 includes a first sub-segment 1431 connected to the main body portion 141, a second sub-segment 1432 connected to the coupling portion 142, and a third sub-segment 1433 connecting the first sub-segment 1431 and the second sub-segment 1432; the first sub-segment 1431 and the third sub-segment 1433 form a first angle, and the second sub-segment 1432 and the third sub-segment 1433 form a second angle.

[0074] In some examples, the first angle may be 85° to 90°, and the second angle may be 85° to 90°, for example, the first angle is 90°, and the second angle is 90°. The angles of the first angle and the second angle are not specifically limited herein.

[0075] In some examples, the material of the dielectric substrate 110 can be a resin substrate material with a small loss tangent of the dielectric constant, such as polytetrafluoroethylene, a low-loss organic polymer plate, a high-dielectric-constant ceramic plate, a hard material with low microwave loss, such as quartz and glass, or other dielectrics with adjustable dielectric constants, such as graphene.

[0076] like Figure 7 As shown, Figure 4 The S of the antenna 100 shown 11 Curve graph. It can be seen from the figure that the reflection coefficient of the antenna 100 in the frequency range of 0.49GHz to 0.74GHz and 0.85GHz to 10GHz is less than -10dB. Only in the frequency range of 0.74GHz to 0.85GHz does the impedance rise slightly, but it is still relatively low and does not affect the monitoring and detection of the target road by the road non-destructive testing system 1 disclosed in the present invention. The antenna 100 has a relative bandwidth of about 19% in the frequency range of 0.5GHz to 0.74GHz, and a relative bandwidth of about 170% in the frequency range of 0.85GHz to 10GHz, achieving ultra-wideband. Since the highest frequency in the simulation calculation is only calculated to 10GHz, but from S 11 It can also be seen from the graph that the reflection coefficient after 10 GHz is also significantly lower than -10 dB, so the bandwidth of the antenna 100 at high frequencies is wider.

[0077] In some examples, such as Figure 8 As shown, the antenna 100 module 10 includes four Figure 4 The antenna 100 shown has four Figure 4 The antennas 100 shown are arranged in a row, and each antenna 100 is connected to the RF transceiver module 20 to form a MIMO antenna 100 .

[0078] By forming an array of multiple antennas 100 , the gain of the antenna 100 can be effectively increased, making the radiation distance of the antenna 100 longer.

[0079] like Figure 9 As shown, Figure 8 The antenna array 100 shown in FIG. 11 As can be seen from the figure, at least the reflection coefficients in the frequency ranges of 0.48GHz to 0.72GHz, 1.10GHz to 6.06GHz, and 6.39GHz to 10GHz are all less than -10dB. In some frequency ranges of 0.72GHz to 1.1GHz and 6.06GHz to 6.39GHz, the impedance increases slightly, but it is still relatively low and does not affect the monitoring and detection of the target road using the road nondestructive testing system 1 disclosed in the present invention. Since the highest frequency in the simulation calculation is only calculated to 10GHz, but from S 11 The graph also shows that the reflection coefficient is significantly lower than -10dB above 10 GHz, indicating that the antenna 100 has a wider bandwidth at high frequencies. By setting the spacing between antennas 100 to approximately 0.5 wavelengths, the coupling between antennas 100 at low frequencies can be reduced, thereby lowering the reflection coefficient at low frequencies.

[0080] In some instances, such as Figure 10 As shown, the antenna 100 module 10 includes 8 Figure 4 The antenna 100 shown has 8 Figure 4 The antennas 100 are arranged in two rows and four columns, and each antenna 100 is connected to a radio frequency transceiver module 20 to form a MIMO antenna 100 .

[0081] By forming an array of multiple antennas 100 , the gain of the antenna 100 can be effectively increased, making the radiation distance of the antenna 100 longer.

[0082] like Figure 11 As shown, Figure 10 The antenna array 100 shown in FIG. 11 As can be seen from the graph, at least the reflection coefficients in the frequency ranges of 0.50GHz to 0.73GHz, 1.10GHz to 6.09GHz, and 6.40GHz to 10GHz are all less than -10dB. In some frequency ranges of 0.73GHz to 1.10GHz and 6.09GHz to 6.40GHz, the impedance increases slightly, but is still relatively low and does not affect the monitoring and detection of the target road using the road nondestructive testing system 1 disclosed in the present invention. Since the highest frequency in the simulation calculation is only calculated to 10GHz, but from S 11The graph also shows that the reflection coefficient is significantly lower than -10dB above 10 GHz, indicating that the antenna 100 has a wider bandwidth at high frequencies. By setting the spacing between antennas 100 to approximately 0.5 wavelengths, the coupling between antennas 100 at low frequencies can be reduced, thereby lowering the reflection coefficient at low frequencies.

[0083] In other examples, the antenna 100 module 10 may include other numbers of antennas 100, and the antenna 100 may not be limited to Figure 4 In the structure shown, multiple antennas 100 can be arranged in an array to form other types of antennas 100, such as a phased array antenna 100, which is not specifically limited here.

[0084] The second example,

[0085] like Figure 12 As shown, antenna 100 includes a dielectric substrate 110, a radiating patch 120, a feed line 130, and a reference electrode layer 140. The dielectric substrate 110 includes a first surface and a second surface disposed opposite each other along its thickness. The radiating patch 120 and the feed line 130 are disposed on the first surface of the dielectric substrate 110. The radiating patch 120 has a first opening 121 extending through its thickness, and the feed line 130 is electrically connected to the radiating patch 120. The reference electrode layer 140 is disposed on the second surface of the dielectric substrate 110 and includes a main portion 141, a connecting portion 143, and a coupling portion 142. The main portion 141 is electrically connected to the coupling portion 142 via the connecting portion 143. The orthographic projections of the coupling portion 142 and the first opening 121 of the radiating patch 120 on the dielectric substrate 110 at least partially overlap. The coupling portion 142 is coupled to the radiating layer, and the orthographic projections of the main portion 141 and the feed line 130 on the dielectric substrate 110 at least partially overlap. Among them, the radiation patch 120 includes a radiation main part 122 and a radiation auxiliary part 123, the radiation auxiliary part 123 surrounds the radiation main part 122, and there is a gap between the radiation auxiliary part 123 and the radiation main part 122; the feed line 130 is electrically connected to the radiation main part 122 and the radiation auxiliary part 123; the first opening 121 penetrates the radiation main part 122 along the thickness direction of the radiation main part 122.

[0086] In the antenna 100 of this example, the feed line 130 is electrically connected to the radiation patch 120, and the electromagnetic wave detection signal is transmitted to the radiation patch 120 through the feed line 130. The radiation patch 120 has a first opening 121 extending through the thickness thereof. The reference electrode layer 140 includes a main body 141, a coupling portion 142, and a connecting portion 143 connecting the main body 141 and the coupling portion 142. The coupling portion 142 is coupled to the radiation layer. The coupling is beneficial to increasing the bandwidth of the antenna 100 and realizing a wide-band antenna 100. The main body 141 of the reference electrode layer 140 and the orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlap, which is beneficial to reducing the transmission loss of the feed line 130 and improving the signal stability of the feed line 130.

[0087] In some examples, the outer contour of the first opening 121 is composed of sequentially connected arc segments that are convex in a direction away from the center of the first opening 121 .

[0088] By designing the outer contour of the first opening 121 on the radiation patch 120 to be composed of arc segments that are convex outward in a direction away from the center of the first opening 121 and are connected in sequence, it is beneficial to achieve good impedance matching between the radiation patch 120 and the reference electrode layer 140, thereby facilitating the realization of a larger impedance bandwidth of the antenna 100.

[0089] In some examples, such as Figure 12 As shown, the outer contour of the radiation patch 120 is circular. In other examples, the outer contour of the radiation patch 120 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0090] In some examples, such as Figure 12 As shown, the outer contour of the coupling portion 142 of the reference electrode layer 140 is circular. In other examples, the outer contour of the coupling portion 142 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0091] In some examples, such as Figure 12 As shown, the main body 141 of the reference electrode layer 140 has a plurality of sequentially connected side edges. The main body 141 has a second opening 1411 extending through the main body 141 along its thickness direction. The second opening 1411 extends through the first side edge 1412 of the main body 141 . The orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlaps with the orthographic projection of the second opening 1411 on the dielectric substrate 110 .

[0092] By providing the second opening 1411 on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0093] In some examples, the main body 141 of the reference electrode layer 140 has a plurality of sides connected in sequence, for example, Figure 12 As shown, the main body 141 of the reference electrode layer 140 has four sequentially connected sides, and the outer contour of the main body 141 is rectangular. In other examples, the main body 141 of the reference electrode layer 140 may have three, five, or six sequentially connected sides, etc., which are not specifically limited here.

[0094] In some examples, such as Figure 12 As shown, the first side 1412 of the main body 141 of the reference electrode layer 140 is the side closest to the orthographic projection of the radiating patch 120 on the dielectric substrate 110 in the orthographic projection of the main body 141 on the dielectric substrate 110. In other examples, the first side 1412 of the main body 141 of the reference electrode layer 140 may also be other sides, which are not specifically limited here.

[0095] In some examples, such as Figure 12 As shown, the outer contour of the second opening 1411 on the main body 141 of the reference electrode layer 140 includes a first line segment 1411a and a second line segment 1411b intersecting the first side 1412, and a third line segment 1411c connecting the first line segment 1411a and the second line segment 1411b. The second opening 1411 is a U-shaped opening.

[0096] By providing a U-shaped opening on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for further increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0097] In some examples, such as Figure 12 As shown, the connecting portion 143 of the reference electrode layer 140 includes a first sub-segment 1431 connected to the main body portion 141, a second sub-segment 1432 connected to the coupling portion 142, and a third sub-segment 1433 connecting the first sub-segment 1431 and the second sub-segment 1432; the first sub-segment 1431 and the third sub-segment 1433 form a first angle, and the second sub-segment 1432 and the third sub-segment 1433 form a second angle.

[0098] In some examples, the first angle may be 85° to 90°, and the second angle may be 85° to 90°, for example, the first angle is 90°, and the second angle is 90°. The angles of the first angle and the second angle are not specifically limited herein.

[0099] like Figure 13 As shown, Figure 12 The S of the antenna 100 shown in FIG. 11Curve graph. It can be seen from the figure that by adding a ring-shaped radiation auxiliary part 123 to the periphery of the radiation main part 122 of the radiation patch 120, the frequency band with a reflection coefficient lower than -10dB in the 0-10GHz frequency band includes three parts, namely 0.65GHz-2.79GHz, 3.58GHz-5.51GHz and 6.29GHz-10GHz. The antenna 100 has a relative bandwidth of about 62% in the 0.65GHz-2.79GHz frequency band, a relative bandwidth of about 43% in the 3.58GHz-5.52GHz frequency band, and a relative bandwidth of about 46% in the 6.29GHz-10GHz frequency band. From S 11 It can also be seen from the graph that the reflection coefficient after 10 GHz is also significantly lower than -10 dB, so the bandwidth of the antenna 100 at high frequencies is wider.

[0100] The third example

[0101] like Figure 14 As shown, the antenna 100 includes a dielectric substrate 110 , a radiation patch 120 , a feed line 130 and a reference electrode layer 140 . The dielectric substrate 110 includes a first surface and a second surface disposed opposite each other along its thickness direction. A radiating patch 120 and a feed line 130 are disposed on the first surface of the dielectric substrate 110. The radiating patch 120 has a first opening 121 extending through its thickness direction. The outer contour of the first opening 121 is composed of sequentially connected arc segments convex outwardly in a direction away from the center of the first opening 121. The feed line 130 is electrically connected to the radiating patch 120. A reference electrode layer 140 is disposed on the second surface of the dielectric substrate 110. The reference electrode layer 140 includes a main portion 141, a connecting portion 143, and a coupling portion 142. The main portion 141 is electrically connected to the coupling portion 142 via the connecting portion 143. The orthographic projection of the first opening 121 on the dielectric substrate 110 completely covers the orthographic projection of the coupling portion 142 on the dielectric substrate 110. The coupling portion 142 is coupled to the radiating layer. The orthographic projections of the main portion 141 and the feed line 130 on the dielectric substrate 110 at least partially overlap.

[0102] In the antenna 100 of this example, the feed line 130 is electrically connected to the radiation patch 120, and the electromagnetic wave detection signal is transmitted to the radiation patch 120 through the feed line 130. The radiation patch 120 has a first opening 121 that runs through the radiation patch 120 along its thickness direction. The reference electrode layer 140 includes a main body 141, a coupling portion 142, and a connecting portion 143 connecting the main body 141 and the coupling portion 142. The coupling portion 142 is coupled to the radiation layer. Through the coupling method, it is beneficial to increase the bandwidth of the antenna 100 and realize a wide-band antenna 100. The outer contour of the first opening 121 on the radiating patch 120 is composed of arc segments that are convex in a direction away from the center of the first opening 121 and are connected in sequence, which is conducive to achieving good impedance matching between the radiating patch 120 and the reference electrode layer 140, thereby facilitating a larger impedance bandwidth of the antenna 100; the main body 141 of the reference electrode layer 140 and the orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlap, which is conducive to reducing the transmission loss of the feed line 130 and improving the signal stability of the feed line 130.

[0103] In some examples, such as Figure 14 As shown, the outer contour of the radiation patch 120 is circular. In other examples, the outer contour of the radiation patch 120 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0104] In some examples, such as Figure 14 As shown, the outer contour of the coupling portion 142 of the reference electrode layer 140 is circular. In other examples, the outer contour of the coupling portion 142 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0105] In some examples, such as Figure 14 As shown, the main body 141 of the reference electrode layer 140 has a plurality of sequentially connected side edges. The main body 141 has a second opening 1411 extending through the main body 141 along its thickness direction. The second opening 1411 extends through the first side edge 1412 of the main body 141 . The orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlaps with the orthographic projection of the second opening 1411 on the dielectric substrate 110 .

[0106] By providing the second opening 1411 on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0107] In some examples, the main body 141 of the reference electrode layer 140 has a plurality of sides connected in sequence, for example, Figure 14As shown, the main body 141 of the reference electrode layer 140 has four sequentially connected sides, and the outer contour of the main body 141 is rectangular. In other examples, the main body 141 of the reference electrode layer 140 may have three, five, or six sequentially connected sides, etc., which are not specifically limited here.

[0108] In some examples, such as Figure 14 As shown, the first side 1412 of the main body 141 of the reference electrode layer 140 is the side closest to the orthographic projection of the radiating patch 120 on the dielectric substrate 110 in the orthographic projection of the main body 141 on the dielectric substrate 110. In other examples, the first side 1412 of the main body 141 of the reference electrode layer 140 may also be other sides, which are not specifically limited here.

[0109] In some examples, such as Figure 14 As shown, the outer contour of the second opening 1411 in the main portion 141 of the reference electrode layer 140 includes a first line segment 1411a and a second line segment 1411b intersecting the first side 1412, and a third line segment 1411c connecting the first line segment 1411a and the second line segment 1411b. The second opening 1411 is a U-shaped opening. By providing the U-shaped opening in the main portion 141 of the reference electrode layer 140, the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which helps further increase the bandwidth of the antenna 100 and realize a wideband antenna 100.

[0110] In some examples, such as Figure 14 As shown, the connecting portion 143 of the reference electrode layer 140 includes a first sub-segment 1431 connected to the main body portion 141, a second sub-segment 1432 connected to the coupling portion 142, and a third sub-segment 1433 connecting the first sub-segment 1431 and the second sub-segment 1432; the first sub-segment 1431 and the third sub-segment 1433 form a first angle, and the second sub-segment 1432 and the third sub-segment 1433 form a second angle.

[0111] In some examples, the first angle may be 85° to 90°, and the second angle may be 85° to 90°, for example, the first angle is 90°, and the second angle is 90°. The angles of the first angle and the second angle are not specifically limited herein.

[0112] like Figure 15 As shown, Figure 14 The S of the antenna 100 shown 11Curve graph. It can be seen from the figure that the reflection coefficient of the antenna 100 in the frequency bands of 0.507GHz to 6.057GHz and 6.38GHz to 10GHz is less than -10dB, and the working bandwidth of the antenna 100 is divided into two sections. Only in the frequency range of 6.057GHz to 6.38GHz does the impedance rise slightly, but it is still low and does not affect the monitoring and detection of the target road using the road non-destructive testing system 1 disclosed in the present invention. The antenna 100 has a relative bandwidth of about 170% in the frequency band of 0.507GHz to 6.057GHz, and a relative bandwidth of about 44% in the frequency band of 6.38GHz to 10GHz. Since the highest frequency in the simulation calculation is only calculated to 10GHz, but from S 11 It can also be seen from the graph that the reflection coefficient after 10 GHz is also significantly lower than -10 dB, so the bandwidth of the antenna 100 at high frequencies is wider.

[0113] Fourth example

[0114] like Figure 16 As shown, the antenna 100 includes a dielectric substrate 110, a radiating patch 120, a feed line 130, and a reference electrode layer 140. The dielectric substrate 110 includes a first surface and a second surface disposed opposite each other along its thickness. The radiating patch 120 and the feed line 130 are disposed on the first surface of the dielectric substrate 110. The radiating patch 120 has a first opening 121 extending through its thickness. The outer contour of the first opening 121 is circular, and the feed line 130 is electrically connected to the radiating patch 120. The reference electrode layer 140 is disposed on the second surface of the dielectric substrate 110 and includes a main portion 141, a connecting portion 143, and a coupling portion 142. The main portion 141 is electrically connected to the coupling portion 142 via the connecting portion 143. The orthographic projections of the coupling portion 142 and the first opening 121 of the radiating patch 120 on the dielectric substrate 110 at least partially overlap. The coupling portion 142 is coupled to the radiating layer. The orthographic projections of the main portion 141 and the feed line 130 on the dielectric substrate 110 at least partially overlap.

[0115] In the antenna 100 of this example, the feed line 130 is electrically connected to the radiation patch 120, and the electromagnetic wave detection signal is transmitted to the radiation patch 120 through the feed line 130. The radiation patch 120 has a first opening 121 extending through the thickness thereof. The reference electrode layer 140 includes a main body 141, a coupling portion 142, and a connecting portion 143 connecting the main body 141 and the coupling portion 142. The coupling portion 142 is coupled to the radiation layer. Through coupling, the bandwidth of the antenna 100 is increased, thereby realizing a wide-band antenna 100. The outer contour of the first opening 121 on the radiation patch 120 is circular, which is conducive to achieving good impedance matching between the radiation patch 120 and the reference electrode layer 140, thereby facilitating a larger impedance bandwidth of the antenna 100. The main body 141 of the reference electrode layer 140 at least partially overlaps with the orthographic projection of the feed line 130 on the dielectric substrate 110, which is conducive to reducing the transmission loss of the feed line 130 and improving the signal stability of the feed line 130.

[0116] In some examples, such as Figure 16 As shown, the outer contour of the radiation patch 120 is circular. In other examples, the outer contour of the radiation patch 120 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0117] In some examples, such as Figure 16 As shown, the outer contour of the coupling portion 142 of the reference electrode layer 140 is circular. In other examples, the outer contour of the coupling portion 142 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0118] In some examples, such as Figure 16 As shown, the main body 141 of the reference electrode layer 140 has a plurality of sequentially connected side edges. The main body 141 has a second opening 1411 extending through the main body 141 along its thickness direction. The second opening 1411 extends through the first side edge 1412 of the main body 141 . The orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlaps with the orthographic projection of the second opening 1411 on the dielectric substrate 110 .

[0119] By providing the second opening 1411 on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0120] In some examples, such as Figure 16 As shown, the main body 141 of the reference electrode layer 140 has a plurality of side edges connected in sequence, for example, Figure 12As shown, the main body 141 of the reference electrode layer 140 has four sequentially connected sides, and the outer contour of the main body 141 is rectangular. In other examples, the main body 141 of the reference electrode layer 140 may have three, five, or six sequentially connected sides, etc., which are not specifically limited here.

[0121] In some examples, such as Figure 16 As shown, the first side 1412 of the main body 141 of the reference electrode layer 140 is the side closest to the orthographic projection of the radiating patch 120 on the dielectric substrate 110 in the orthographic projection of the main body 141 on the dielectric substrate 110. In other examples, the first side 1412 of the main body 141 of the reference electrode layer 140 may also be other sides, which are not specifically limited here.

[0122] In some examples, such as Figure 16 As shown, the outer contour of the second opening 1411 in the main portion 141 of the reference electrode layer 140 includes a first line segment 1411a and a second line segment 1411b intersecting the first side 1412, and a third line segment 1411c connecting the first line segment 1411a and the second line segment 1411b. The second opening 1411 is a U-shaped opening. By providing the U-shaped opening in the main portion 141 of the reference electrode layer 140, the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which helps further increase the bandwidth of the antenna 100 and realize a wideband antenna 100.

[0123] In some examples, such as Figure 16 As shown, the connecting portion 143 of the reference electrode layer 140 includes a first sub-segment 1431 connected to the main body portion 141, a second sub-segment 1432 connected to the coupling portion 142, and a third sub-segment 1433 connecting the first sub-segment 1431 and the second sub-segment 1432; the first sub-segment 1431 and the third sub-segment 1433 form a first angle, and the second sub-segment 1432 and the third sub-segment 1433 form a second angle.

[0124] In some examples, the first angle may be 85° to 90°, and the second angle may be 85° to 90°, for example, the first angle is 90°, and the second angle is 90°. The angles of the first angle and the second angle are not specifically limited herein.

[0125] like Figure 17 As shown, Figure 16 The S of the antenna 100 shown 11Curve graph. As can be seen from the graph, the S11 of the antenna 100 is less than -10dB in the 0.49GHz to 0.77GHz, 0.83GHz to 6.07GHz, and 6.31GHz to 10GHz frequency bands. The operating bandwidth of the antenna 100 is divided into three segments. Only in the 0.77GHz to 0.83GHz and 6.07GHz to 6.31GHz frequency ranges does the impedance rise slightly, but it is still relatively low and does not affect the monitoring and detection of the target road using the road nondestructive testing system 1 disclosed in the present invention. The antenna 100 has a relative bandwidth of approximately 45% in the 0.49GHz to 0.77GHz frequency band, a relative bandwidth of approximately 152% in the 0.83GHz to 6.07GHz frequency band, and a relative bandwidth of approximately 45% in the 6.31GHz to 10GHz frequency band. Since the highest frequency in the simulation calculation is only 10 GHz, it can be seen from the figure that the reflection coefficient after 10 GHz is also significantly lower than -10 dB, so the antenna 100 has a wider bandwidth at high frequencies.

[0126] The fifth example

[0127] like Figure 18 As shown, antenna 100 includes a dielectric substrate 110, a radiating patch 120, a feed line 130, and a reference electrode layer 140. The dielectric substrate 110 includes a first surface and a second surface disposed opposite each other along its thickness. The radiating patch 120 and the feed line 130 are disposed on the first surface of the dielectric substrate 110. The radiating patch 120 has a first opening 121 extending through its thickness. The outer contour of the first opening 121 is elliptical, and the feed line 130 is electrically connected to the radiating patch 120. The reference electrode layer 140 is disposed on the second surface of the dielectric substrate 110 and includes a main portion 141, a connecting portion 143, and a coupling portion 142. The main portion 141 is electrically connected to the coupling portion 142 via the connecting portion 143. The orthographic projections of the coupling portion 142 and the first opening 121 of the radiating patch 120 on the dielectric substrate 110 at least partially overlap. The coupling portion 142 is coupled to the radiating layer. The orthographic projections of the main portion 141 and the feed line 130 on the dielectric substrate 110 at least partially overlap.

[0128] In the antenna 100 of this example, the feed line 130 is electrically connected to the radiation patch 120, and the electromagnetic wave detection signal is transmitted to the radiation patch 120 through the feed line 130. The radiation patch 120 has a first opening 121 extending through the thickness thereof. The reference electrode layer 140 includes a main body 141, a coupling portion 142, and a connecting portion 143 connecting the main body 141 and the coupling portion 142. The coupling portion 142 is coupled to the radiation layer. Through coupling, the bandwidth of the antenna 100 is increased, thereby realizing a wide-band antenna 100. The outer contour of the first opening 121 on the radiation patch 120 is elliptical, which is conducive to achieving good impedance matching between the radiation patch 120 and the reference electrode layer 140, thereby facilitating a larger impedance bandwidth of the antenna 100. The main body 141 of the reference electrode layer 140 at least partially overlaps with the orthographic projection of the feed line 130 on the dielectric substrate 110, which is conducive to reducing the transmission loss of the feed line 130 and improving the signal stability of the feed line 130.

[0129] In some examples, the ellipse has an axial ratio of 1.3 to 1.7. For example, the ellipse has an axial ratio of 1.4, 1.5, 1.6, etc., which are not specifically limited here. By adjusting the axial ratio of the elliptical outer contour of the first opening 121, the bandwidth of the antenna 100 can be adjusted.

[0130] In some examples, such as Figure 18 As shown, the outer contour of the radiation patch 120 is circular. In other examples, the outer contour of the radiation patch 120 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0131] In some examples, such as Figure 18 As shown, the outer contour of the coupling portion 142 of the reference electrode layer 140 is circular. In other examples, the outer contour of the coupling portion 142 may also be elliptical, rectangular, square, etc., which is not specifically limited here.

[0132] In some examples, such as Figure 18 As shown, the main body 141 of the reference electrode layer 140 has a plurality of sequentially connected side edges. The main body 141 has a second opening 1411 extending through the main body 141 along its thickness direction. The second opening 1411 extends through the first side edge 1412 of the main body 141 . The orthographic projection of the feed line 130 on the dielectric substrate 110 at least partially overlaps with the orthographic projection of the second opening 1411 on the dielectric substrate 110 .

[0133] By providing the second opening 1411 on the main body 141 of the reference electrode layer 140 , the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which is beneficial for increasing the bandwidth of the antenna 100 and realizing a wideband antenna 100 .

[0134] In some examples, the main body 141 of the reference electrode layer 140 has a plurality of sides connected in sequence, for example, Figure 12 As shown, the main body 141 of the reference electrode layer 140 has four sequentially connected sides, and the outer contour of the main body 141 is rectangular. In other examples, the main body 141 of the reference electrode layer 140 may have three, five, or six sequentially connected sides, etc., which are not specifically limited here.

[0135] In some examples, such as Figure 18 As shown, the first side 1412 of the main body 141 of the reference electrode layer 140 is the side closest to the orthographic projection of the radiating patch 120 on the dielectric substrate 110 in the orthographic projection of the main body 141 on the dielectric substrate 110. In other examples, the first side 1412 of the main body 141 of the reference electrode layer 140 may also be other sides, which are not specifically limited here.

[0136] In some examples, such as Figure 18 As shown, the outer contour of the second opening 1411 in the main portion 141 of the reference electrode layer 140 includes a first line segment 1411a and a second line segment 1411b intersecting the first side 1412, and a third line segment 1411c connecting the first line segment 1411a and the second line segment 1411b. The second opening 1411 is a U-shaped opening. By providing the U-shaped opening in the main portion 141 of the reference electrode layer 140, the orthographic projections of the feed line 130 and the second opening 1411 on the dielectric substrate 110 at least partially overlap, which helps further increase the bandwidth of the antenna 100 and realize a wideband antenna 100.

[0137] In some examples, such as Figure 18 As shown, the connecting portion 143 of the reference electrode layer 140 includes a first sub-segment 1431 connected to the main body portion 141, a second sub-segment 1432 connected to the coupling portion 142, and a third sub-segment 1433 connecting the first sub-segment 1431 and the second sub-segment 1432; the first sub-segment 1431 and the third sub-segment 1433 form a first angle, and the second sub-segment 1432 and the third sub-segment 1433 form a second angle.

[0138] In some examples, the first angle may be 85° to 90°, and the second angle may be 85° to 90°, for example, the first angle is 90°, and the second angle is 90°. The angles of the first angle and the second angle are not specifically limited herein.

[0139] like Figure 19 As shown, Figure 18 The S of the antenna 100 shown 11Curve graph. As can be seen from the figure, the reflection coefficient of the antenna 100 in the frequency range of 0.52GHz to 6.14GHz and 6.27GHz to 10GHz is less than -10dB. The working bandwidth of the antenna 100 is divided into two sections. Only in the frequency range of 6.14GHz to 6.27GHz does the impedance rise slightly, but it is still low and does not affect the monitoring and detection of the target road using the road non-destructive testing system 1 disclosed in the present invention. The relative bandwidth of the antenna 100 in the frequency range of 0.52GHz to 6.14GHz reaches a relative bandwidth of about 169%, and in the frequency range of 6.27GHz to 10GHz, the relative bandwidth reaches a relative bandwidth of about 46%. Since the highest frequency in the simulation calculation is only calculated to 10GHz, it can be seen from the figure that the reflection coefficient after 10GHz is also significantly lower than -10dB, so the bandwidth of the antenna 100 at high frequencies is wider.

[0140] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A road nondestructive testing system, comprising an antenna module, a radio frequency transceiver module and a signal processing module, wherein: The antenna module is used to transmit an electromagnetic wave detection signal to a target road and receive an electromagnetic wave echo signal reflected by the target road; The RF transceiver module is connected to the antenna module and the signal processing module respectively, and is used to modulate the detection signal of the signal processing module into an electromagnetic wave detection signal and transmit it to the antenna module, and demodulate the electromagnetic echo signal received by the antenna module into a feedback signal and transmit it to the signal processing module; The signal processing module is used to generate a detection signal for the target road, receive the feedback signal, and generate a disease detection result for the target road according to the feedback signal.

2. The road nondestructive testing system according to claim 1, wherein: The antenna module includes at least one antenna, and the antenna includes: A dielectric substrate comprising a first surface and a second surface disposed opposite to each other along a thickness direction thereof; A radiation patch and a feed line are provided on the first surface, the radiation patch has a first opening extending through the thickness thereof, and the feed line is electrically connected to the radiation patch; A reference electrode layer is provided on the second surface and includes a main body, a connecting portion, and a coupling portion; the main body is electrically connected to the coupling portion through the connecting portion, the coupling portion and the orthographic projection of the first opening on the dielectric substrate at least partially overlap, the coupling portion is coupled to the radiation layer, and the main body and the orthographic projection of the feed line on the dielectric substrate at least partially overlap.

3. The road nondestructive testing system according to claim 2, wherein: The outer contour of the first opening is composed of arc segments connected in sequence and convex in a direction away from the center of the first opening.

4. The road nondestructive testing system according to claim 2, wherein: The outer contour of the first opening is composed of arc segments connected in sequence and convex in a direction away from the center of the first opening; the orthographic projection of the first opening on the dielectric substrate completely covers the orthographic projection of the coupling portion on the dielectric substrate.

5. The road nondestructive testing system according to claim 2, wherein: The outer contour of the first opening is circular.

6. The road nondestructive testing system according to claim 2, wherein: The outer contour of the first opening is elliptical.

7. The road nondestructive testing system according to claim 6, wherein: The ellipse has an axis ratio of 1.3 to 1.

7.

8. The road nondestructive testing system according to claim 2, wherein: The radiation patch includes a radiation main portion and a radiation auxiliary portion, the radiation auxiliary portion surrounds the radiation main portion, and there is a gap between the radiation auxiliary portion and the radiation main portion; the feeder is electrically connected to the radiation main portion and the radiation auxiliary portion; the first opening penetrates the radiation main portion along the thickness direction of the radiation main portion.

9. The road nondestructive testing system according to any one of claims 2 to 8, wherein: The main body has a plurality of side edges connected in sequence, and the main body has a second opening penetrating along a thickness direction thereof, wherein the second opening penetrates the first side edge of the main body; The orthographic projection of the feed line on the dielectric substrate at least partially overlaps with the orthographic projection of the second opening on the dielectric substrate.

10. The road nondestructive testing system according to claim 9, wherein: The outer contour of the second opening includes a first line segment and a second line segment intersecting the first side, and a third line segment connecting the first line segment and the second line segment.

11. The road nondestructive testing system according to claim 9, wherein: The connecting portion includes a first sub-segment connected to the main body portion, a second sub-segment connected to the coupling portion, and a third sub-segment connecting the first sub-segment and the second sub-segment; the first sub-segment and the third sub-segment form a first angle, and the second sub-segment and the third sub-segment form a second angle.

12. The road nondestructive testing system according to claim 2, wherein: The antenna module includes a plurality of antennas arranged in an array, and the plurality of antennas are respectively connected to the radio frequency transceiver module.

13. The road nondestructive testing system according to claim 1, wherein: The RF transceiver module is also used to modulate the detection signal of the signal processing module into an electromagnetic wave detection signal with a first frequency or a second frequency, and transmit the electromagnetic wave detection signal with the first frequency or the second frequency to the antenna module, wherein the first frequency is different from the second frequency.

14. The road nondestructive testing system according to claim 13, wherein: The first frequency range is 0.5 GHz to 6.1 GHz and 6.4 GHz to 10 GHz; The second frequency ranges from 0.5 GHz to 6.1 GHz and from 6.4 GHz to 10 GHz.

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