Dual port microsonic tag resistant to metal clutter

Abstract

The application provides an anti-metal clutter dual-port microsound identifier, comprising a microsound chip and a dual-polarized antenna; the dual-polarized antenna is connected to the microsound chip; a microsound chip receiving end and a microsound chip transmitting end are arranged on the microsound chip; the microsound chip comprises a plurality of one-way single-phase transducers; the one-way single-phase transducers comprise input end one-way single-phase transducers and output end one-way single-phase transducers; the input end one-way single-phase transducers are connected to the microsound chip receiving end; and the output end one-way single-phase transducers are connected to the microsound chip transmitting end. Through the input and output ports of the microsound chip and the dual-polarized antenna, polarization isolation of input and output is realized, and external noise is well suppressed, so that metal clutter such as multipath fading and far target clutter interference in an industrial environment can be effectively suppressed.

Description

Technical Field

[0001] This invention relates to the field of industrial Internet of Things (IoT) technology, and more specifically, to a dual-port silent tag that resists metallic noise. Background Technology

[0002] Low-frequency sensing technology utilizes radio frequency signals to achieve target identification and acquire relevant data. It boasts advantages such as being contactless and highly resistant to interference, facilitating system automation and serving as a key technology for the Internet of Things (IoT). It has already been widely applied in numerous fields including manufacturing, logistics, and retail. In recent years, low-frequency sensing technology has also seen widespread application in metallurgy, petroleum, power, tracking, and positioning.

[0003] As a new generation of identification and sensing technology, the micro-acoustic tag is a device based on piezoelectric micro-acoustic technology. It consists of an antenna and a surface acoustic wave (SAW) chip. It utilizes the time delay information of SAW propagating from the piezoelectric crystal surface for encoding. During SAW information acquisition, it cleverly utilizes the piezoelectric and inverse piezoelectric effects to achieve transduction between electromagnetic waves and SAW, passively reflecting only the query electromagnetic wave pulse. Its system working principle is similar to that of a radar system: the radar sends a query electromagnetic wave to the tag's antenna. The query electromagnetic wave received by the tag's antenna passes through the interdigital transducer on the micro-acoustic chip. Due to the inverse piezoelectric effect of the piezoelectric material, the query electromagnetic wave is converted into a SAW propagating along the piezoelectric crystal direction on the piezoelectric substrate. After a delay, the SAW wave reflected back to the transducer is converted back into an electromagnetic wave by the direct piezoelectric effect of the piezoelectric material and transmitted to the radar through the tag's antenna.

[0004] When radar operates in complex industrial environments such as steel smelting, it encounters multipath fading and clutter interference. The reader antenna transmits the query signal with a wide beam angle. Electromagnetic waves are reflected by objects, walls, and the ground, especially metal surfaces which have high reflectivity. Multiple reflections between metal objects create complex multipath propagation, which is non-line-of-sight multipath propagation. The reader transmits a fixed-frequency query signal and receives echo signals from multipath propagation, including the useful echo signal from the SAW tag and direct reflections from objects. Multipath fading refers to the slow, short-duration fading of the received echo after the radar transmits a query pulse signal. This fading is particularly pronounced in environments with strong metallic interference. Clutter interference occurs in industrial environments with numerous large metal devices. The electromagnetic waves emitted by the reader are reflected multiple times between metal objects, creating strong clutter with a long tail time, reaching several microseconds. This type of clutter is metallic interference, which reduces the dynamic range and signal-to-noise ratio of the reader. When the clutter delay is long, it mixes and superimposes with the effective echo of the micro-acoustic chip, resulting in a reduced recognition distance. Clutter formed by repeated reflections of the query signal by metallic objects can affect the echo received by the reader from the micro-acoustic tag, and may even block the receiving path. These two types of interference signals are collectively referred to as metallic clutter. Unlike noise, metallic clutter is a reflected wave of the transmitted signal. Its signal strength, delay, and other parameters are closely related to the parameters of the radar and the scattering object, such as the radar antenna gain, the power of the transmitted signal, and the distance, type, and number of the scattering object. Because the motion state of the micro-acoustic tags used in industrial scenarios is uncertain, such as long-term static or rapid movement, and the clutter echo is very similar to the echo of the electromagnetic micro-acoustic tag, the radar cannot correctly distinguish clutter from the effective signal. If the micro-acoustic tag is in motion, moving target detection in radar signal processing can be used to suppress static clutter. However, in most scenarios, the micro-acoustic tag is static, making it extremely difficult to separate clutter from the effective signal through software signal processing algorithms.

[0005] Traditional dual-polarized antennas typically utilize polarization diversity to reduce the impact of multipath fading in mobile communication systems and improve the signal quality received by base stations. Two types of polarization antennas are available: 0° / 90° and 45° / -45°. A dual-polarized antenna consists of two antennas integrated into a single unit, transmitting two independent waves, with the antenna elements arranged perpendicularly to each other. Dual-polarized antennas reduce the number of antennas, simplifying construction and maintenance. The dual-polarized antenna structure comprises a vertically polarized antenna and a horizontally polarized antenna, achieving polarization isolation. The vertically and horizontally polarized antennas are placed on the same side, with their polarization directions at 90 degrees. Based on the principle that linearly polarized electromagnetic waves undergo polarization deflection upon reflection, but do not deflect upon reflection from a plane unless encountering a metal corner, in which case polarization reversal occurs, the isolation between orthogonally polarized electromagnetic waves is theoretically infinitely high. Utilizing this characteristic, a new identifier should be designed to suppress the signal transmitted by the polarized antennas.

[0006] It is worth noting that, in the process of resisting the electromagnetic and acoustic sensing effects of metallic environments, the invention patent application CN115564009A, entitled "An Anti-metal Electronic Tag for Cargo Identification and its Manufacturing Equipment and Method," provides an anti-metal electronic tag shell with an installation mechanism on the bottom surface of the shell. This solution only addresses the problem of the tag's reading distance being affected by the small gap between the tag and the metal surface, thus resisting the influence of being pasted on the metal surface. The invention patent application CN114171880A, entitled "An Antenna Array for Tunnel Coverage," provides an antenna array for tunnel coverage, including a reflector and multiple polarized antenna elements, used to enhance the antenna's bidirectional radiation gain and adapt to narrow tunnel environments, improving signal coverage quality in tunnel environments. This application area differs from that of the present invention. The invention patent CN109782215A, entitled "An Indoor Positioning and Identification System and Positioning and Identification Method Based on Surface Acoustic Wave Technology", provides a scheme for identifying tags through a structure of one radar connected to three antennas, realizing indoor positioning using surface acoustic wave technology. It adopts a single-ended delay linear tag structure. The design of this scheme does not aim to eliminate metallic clutter, and the single-port tag has disadvantages such as large insertion loss and short identification distance. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the purpose of this invention is to provide a dual-port micro-acoustic marker that is resistant to metallic noise.

[0008] A dual-port silent marker with anti-metal clutter according to the present invention includes: a silent chip and a dual-polarized antenna;

[0009] The dual-polarized antenna is connected to the micro-acoustic chip;

[0010] The micro-acoustic chip is provided with a micro-acoustic chip receiver and a micro-acoustic chip transmitter. The micro-acoustic chip includes multiple unidirectional single-phase transducers. Each unidirectional single-phase transducer includes an input unidirectional single-phase transducer and an output unidirectional single-phase transducer. The input unidirectional single-phase transducer is connected to the micro-acoustic chip receiver, and the output unidirectional single-phase transducer is connected to the micro-acoustic chip transmitter.

[0011] Preferably, the micro-acoustic chip further includes: a micro-acoustic chip piezoelectric semiconductor substrate;

[0012] The microacoustic chip piezoelectric semiconductor substrate connects the input unidirectional single-phase transducer and the output unidirectional single-phase transducer.

[0013] Preferably, the input-side unidirectional single-phase transducer includes a micro-acoustic chip receiver transducer;

[0014] The output unidirectional single-phase transducer includes: a first micro-acoustic chip transmitter transducer, a second micro-acoustic chip transmitter transducer, and a third micro-acoustic chip transmitter transducer.

[0015] The micro-acoustic chip receiver transducer, the first micro-acoustic chip transmitter transducer, the second micro-acoustic chip transmitter transducer, and the third micro-acoustic chip transmitter transducer are arranged in sequence.

[0016] Preferably, a micro-acoustic chip busbar electrode plate is connected to the micro-acoustic chip receiver transducer, the first micro-acoustic chip transmitter transducer, the second micro-acoustic chip transmitter transducer, and the third micro-acoustic chip transmitter transducer, and the micro-acoustic chip busbar electrode plate is connected to a dual-polarized antenna through a conductive metal.

[0017] Preferably, the micro-acoustic chip receiver transducer, the first micro-acoustic chip transmitter transducer, the second micro-acoustic chip transmitter transducer, and the third micro-acoustic chip transmitter transducer are connected in parallel.

[0018] Preferably, the dual-polarized antenna includes: a vertically polarized antenna structure and a horizontally polarized antenna structure;

[0019] The vertically polarized antenna structure is connected to the receiving end of the micro-acoustic chip, and the horizontally polarized antenna structure is connected to the transmitting end of the micro-acoustic chip.

[0020] Preferably, the polarization directions of the vertically polarized antenna structure and the horizontally polarized antenna structure are 90 degrees apart.

[0021] Preferably, the unidirectional single-phase transducer employs an interdigital transducer with an internally placed distributed reflective grid array.

[0022] Preferably, the microacoustic chip piezoelectric semiconductor substrate is a 128-cut lithium niobate piezoelectric substrate.

[0023] Preferably, the radar connected to the dual-port micro-acoustic marker signal uses a second dual-polarized antenna, with the radar's transmitting port connected to the vertically polarized antenna of the second dual-polarized antenna and the radar's receiving port connected to the horizontally polarized antenna of the second dual-polarized antenna.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The micro-acoustic chip designed in this application adopts a unidirectional single-phase transducer to ensure that the sound wave is transmitted unidirectionally on the chip surface. Compared with the micro-acoustic chip composed of similar double-sided transducers, it prevents the generation of parasitic signals during the reflection process, has lower insertion loss, improves the signal-to-noise ratio of the echo signal, and increases the accuracy of signal delay measurement.

[0026] (2) The micro-acoustic chip adopts a dual-port structure with opposite input and output. Compared with similar single-port micro-acoustic chips, it prevents energy loss caused by reflection between electrodes inside the chip, reduces the probability of useful signal overlap, reduces the bit error rate, increases the coded capacity of the actual device, and can significantly improve the recognition distance of the system.

[0027] (3) The micro-acoustic chip converts electromagnetic waves and surface acoustic waves through a radio frequency antenna. It does not require an external power supply and has pure passive and wireless characteristics.

[0028] Metal electrodes and piezoelectric materials can withstand high and low temperatures (-200~1000℃);

[0029] It does not involve the electron migration process in semiconductor materials, and has a long lifespan, strong resistance to discharge shocks, and strong resistance to interference from electric and magnetic fields;

[0030] The sensor is small in size (centimeter level), lightweight, and easy to design and install.

[0031] (4) By combining the input and output ports of the micro-acoustic chip with a dual-polarized antenna, polarization isolation of input and output is achieved, while having a good suppression effect on external noise. It can effectively suppress metal clutter in industrial environments, such as multipath fading and clutter interference from large targets at a distance. Attached Figure Description

[0032] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 A schematic diagram of a dual-port micro-acoustic marker for resisting metal noise;

[0034] Figure 2 A schematic diagram of the structure of a micro-acoustic chip (I);

[0035] Figure 3 Schematic diagram of the structure of the micro-acoustic chip (II);

[0036] Figure 4 Architecture diagram of a dual-port micro-acoustic tagging system for resisting metallic noise.

[0037] Figure 5 This is the time-domain response waveform of the transmitter of a micro-acoustic chip;

[0038] As shown in the figure:

[0039] Detailed Implementation

[0040] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0041] Example 1

[0042] like Figure 1 As shown, this embodiment includes: a micro-acoustic chip 1 and a dual-polarized antenna. The dual-polarized antenna is connected to the micro-acoustic chip 1 and includes: a vertically polarized antenna structure 2 and a horizontally polarized antenna structure 3. The vertically polarized antenna structure 2 is connected to the micro-acoustic chip receiver 4, and the horizontally polarized antenna structure 3 is connected to the micro-acoustic chip transmitter 5. The polarization directions of the vertically polarized antenna structure 2 and the horizontally polarized antenna structure 3 are 90 degrees apart. The micro-acoustic chip 1 is provided with the micro-acoustic chip receiver 4 and the micro-acoustic chip transmitter 5. The micro-acoustic chip 1 includes multiple unidirectional single-phase transducers. The unidirectional single-phase transducers adopt an interdigital transducer with an internal distributed reflective grating array. The unidirectional single-phase transducer includes an input unidirectional single-phase transducer and an output unidirectional single-phase transducer. The input unidirectional single-phase transducer is connected to the micro-acoustic chip receiver 4, and the output unidirectional single-phase transducer is connected to the micro-acoustic chip transmitter 5.

[0043] like Figure 2 and Figure 3As shown, the micro-acoustic chip 1 also includes a micro-acoustic chip piezoelectric semiconductor substrate 105. The micro-acoustic chip piezoelectric semiconductor substrate 105 is a 128-cut lithium niobate piezoelectric substrate, and the micro-acoustic chip piezoelectric semiconductor substrate 105 connects the input end unidirectional single-phase transducer and the output end unidirectional single-phase transducer. The input end unidirectional single-phase transducer includes a micro-acoustic chip receiving end transducer 101, and the output end unidirectional single-phase transducer includes a first micro-acoustic chip transmitting end transducer 102, a second micro-acoustic chip transmitting end transducer 103, and a third micro-acoustic chip transmitting end transducer 104. The micro-acoustic chip receiving end transducer 101, the first micro-acoustic chip transmitting end transducer 102, the second micro-acoustic chip transmitting end transducer 103, and the third micro-acoustic chip transmitting end transducer 104 are arranged in parallel in sequence. The micro-acoustic chip receiver transducer 101, the first micro-acoustic chip transmitter transducer 102, the second micro-acoustic chip transmitter transducer 103, and the third micro-acoustic chip transmitter transducer 104 are connected to the micro-acoustic chip busbar electrode plate 106, and the micro-acoustic chip busbar electrode plate 106 is connected to the dual-polarized antenna through conductive metal.

[0044] like Figure 4 As shown, the radar connected to the dual-port micro-acoustic marker signal uses a second dual-polarized antenna. The radar's transmitting port is connected to the vertically polarized antenna of the second dual-polarized antenna, and the radar's receiving port is connected to the horizontally polarized antenna of the second dual-polarized antenna.

[0045] Example 2

[0046] Example 2 is a preferred example of Example 1.

[0047] Based on the polarization isolation characteristics of a dual-polarized antenna, this embodiment provides a dual-port micro-acoustic marker that resists metallic clutter, including: a micro-acoustic chip 1 and a dual-polarized antenna.

[0048] Dual-polarized antenna structures offer polarization isolation, providing a degree of interference resistance. However, in traditional base stations, the primary purpose of polarized antennas is to simplify the antenna and reduce signal fading under multipath conditions. A drawback is the 3dB signal power loss due to the power being distributed between two antennas. In this embodiment, the silent tag is a wireless passive device; the silent chip 1 itself does not require a power supply. Power compensation is achieved simply by increasing the signal transmission power from the transmitter, thus overcoming the shortcomings of traditional dual-polarized antenna base stations.

[0049] The dual-polarized antenna consists of a vertically polarized antenna structure 2 and a horizontally polarized antenna structure 3, with the polarization directions of the two antennas at 90 degrees, forming an orthogonal polarization. The dual-polarized antenna structure is connected to the microacoustic chip bus electrode plate 106 of the microacoustic chip 1 via a conductive metal.

[0050] The micro-acoustic chip 1 consists of a micro-acoustic chip piezoelectric semiconductor substrate 105, a micro-acoustic chip busbar electrode plate 106, and a unidirectional single-phase transducer. The unidirectional single-phase transducer consists of an input unidirectional single-phase transducer and an output unidirectional single-phase transducer, and the input and output unidirectional single-phase transducers excite surface acoustic waves in opposite directions. The input unidirectional single-phase transducers and multiple output unidirectional single-phase transducers on the micro-acoustic chip piezoelectric semiconductor substrate 105 are arranged sequentially according to an encoding rule. The micro-acoustic chip busbar electrode plate 106 of the input unidirectional single-phase transducer is connected to the micro-acoustic chip receiver 4 through a conductive metal, and the micro-acoustic chip busbar electrode plate 106 of the multiple output unidirectional single-phase transducers is connected to the micro-acoustic chip transmitter 5 through a conductive metal.

[0051] like Figure 4 As shown, the radar used to identify the micro-voice tag should also be equipped with the exact same dual-polarized antenna structure, with the radar's transmitting port connected to the vertically polarized antenna and the radar's receiving port connected to the horizontally polarized antenna.

[0052] The above technical solution separates the transmitting and receiving ports of the micro-acoustic marker, achieving polarization isolation between useful electromagnetic waves and metallic clutter, thereby effectively suppressing metallic clutter such as multipath fading and interference from distant large targets.

[0053] More specifically, such as Figure 1 As shown, this embodiment includes: an internal micro-acoustic chip 1 and a dual-polarized antenna. The dual-polarized antenna consists of a vertically polarized antenna structure 2 and a horizontally polarized antenna structure 3. The dual-polarized antenna is connected to the micro-acoustic chip bus electrode plate 106 of the micro-acoustic chip 1 through a conductive metal. The dual-polarized antenna is located on the micro-acoustic chip 1, and the polarization directions of the vertically polarized antenna structure 2 and the horizontally polarized antenna structure 3 are at 90 degrees. The micro-acoustic chip receiver 4 is connected to the vertically polarized antenna structure 2, and the micro-acoustic chip transmitter 5 is connected to the horizontally polarized antenna structure 3.

[0054] like Figure 2As shown, the micro-acoustic chip 1 includes: a micro-acoustic chip piezoelectric semiconductor substrate 105, a micro-acoustic chip bus electrode plate 106, and metal electrode transducers (unidirectional single-phase transducers). A micro-acoustic chip receiving transducer 101 connected to the receiving port of the micro-acoustic chip 1 and multiple output unidirectional single-phase transducers connected to the transmitting port are arranged sequentially on the micro-acoustic chip piezoelectric semiconductor substrate 105. The transducer-based micro-acoustic chip 1 consists of a large and powerful input unidirectional single-phase transducer and several coded output unidirectional single-phase transducers. The input and all output interdigitated transducers are connected in parallel. When an electrical signal is applied to the common electrical port, all transducers will generate surface acoustic waves. Because the forward and reverse transfer functions are unequal in the unidirectional single-phase transducer of the RF micro-acoustic chip, the insertion loss of the signal generated by the input transducer and received by an output transducer will be different from that of the signal generated by the output transducer and received by the input transducer, thus forming the unidirectional transmission characteristic of the entire device. In this embodiment, the unidirectional single-phase transducer in the micro-acoustic chip 1 uses an interdigitated transducer with a distributed reflection grid inside. This allows the reflected sound wave and the sound wave excited by the transducer to add in phase in one direction and cancel out in phase in the other, causing the sound wave to radiate in only one direction. When the sound wave undergoes unidirectional transmission, the reflector's position ensures that the reflected waves in both directions satisfy the interference superposition condition, reducing the bilateral loss caused by the bidirectional transducer and lowering the device's insertion loss by more than 3dB.

[0055] The excited transducer generates sound waves, which, during reflection, are received by the coded interdigital transducer. Further parasitic signals may result from these reflections. When all coded pulses have similar time delays, the reflected sound waves are received by the misaligned output transducers. The timing of this parasitic signal coincides with the time delay of the next pulse, potentially causing delay information confusion, and the parasitic signal increases with the number of output transducers. In multi-track systems, these multiple reflections are partially reduced, but the device width increases. If both the input and output interdigital transducers are unidirectional, propagation loss and parasitic loss are reduced, fundamentally suppressing the problem of multiple reflections. Optimal amplitude uniformity of the coded signal is achieved by distributing the input signal across the number of coded transducers, with finely adjusted transducer acousto-electric conversion efficiency, resulting in good uniformity of the delayed pulse amplitude and equal pulse amplitude matching in the echo signal. The time delay distribution of the coded signal is determined by the lateral positional distribution of the coded transducers, allowing for a coding capacity exceeding 1,000,000.

[0056] like Figure 3As shown, in a preferred embodiment, the micro-acoustic chip 1 is made of a 128-cut lithium niobate micro-acoustic chip piezoelectric semiconductor substrate 105. The micro-acoustic chip receiving transducer 101 is connected to the receiving port, and the first micro-acoustic chip transmitting transducer 102, the second micro-acoustic chip transmitting transducer 103, and the third micro-acoustic chip transmitting transducer 104 are connected to the transmitting port. Multiple unidirectional single-phase transducers are arranged in sequence and on the same straight line. The unidirectional single-phase transducers are made of aluminum.

[0057] In the specific implementation process, the radar sends a query pulse signal from the vertically polarized antenna to the micro-acoustic chip receiver 4 of the identifier antenna. Due to polarization isolation, the polarization deflection signal of the linearly polarized electromagnetic wave generated by the metal corner is filtered out. The query signal received by the identifier antenna is converted into a surface acoustic wave propagating along the piezoelectric crystal direction on the piezoelectric substrate by the inverse piezoelectric effect of the piezoelectric material through the interdigital transducer. Due to the time delay, the surface acoustic wave is converted into an electromagnetic wave by the direct piezoelectric effect of the piezoelectric material through multiple transducers. Its encoding information is determined by the position of the transducer and is transmitted to the horizontally polarized receiver of the radar through the horizontally polarized antenna structure 3 of the micro-acoustic chip transmitter 5.

[0058] for Figure 4 The implementation method involves a micro-acoustic chip 1, and the simulated waveform of the micro-acoustic chip transmitter 5 is as follows: Figure 5 As shown in the figure, the three pulses with the highest and similar amplitudes are the electromagnetic wave pulses excited by the transmitter 5 of the micro-acoustic chip.

[0059] The vertically polarized electromagnetic waves emitted by the marker, after multipath fading and clutter, still have a predominantly vertically polarized electromagnetic wave component. At this time, the radar's receiving antenna is horizontally polarized, and through polarization isolation, multipath fading and clutter are effectively suppressed.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A dual-port microsire identifier resistant to metal clutter, characterized in that, include: Micro-acoustic chip (1) and dual-polarized antenna; The dual-polarized antenna is connected to the micro-acoustic chip (1); The micro-acoustic chip (1) is provided with a micro-acoustic chip receiver (4) and a micro-acoustic chip transmitter (5). The micro-acoustic chip (1) includes multiple unidirectional single-phase transducers. Each unidirectional single-phase transducer includes an input unidirectional single-phase transducer and an output unidirectional single-phase transducer. The input unidirectional single-phase transducer is connected to the micro-acoustic chip receiver (4), and the output unidirectional single-phase transducer is connected to the micro-acoustic chip transmitter (5). The micro-acoustic chip (1) further includes: a micro-acoustic chip piezoelectric semiconductor substrate (105); The micro-acoustic chip piezoelectric semiconductor substrate (105) is connected to the input unidirectional single-phase transducer and the output unidirectional single-phase transducer; The input-end unidirectional single-phase transducer includes a micro-acoustic chip receiver transducer (101); The output unidirectional single-phase transducer includes: a first micro-acoustic chip transmitter transducer (102), a second micro-acoustic chip transmitter transducer (103), and a third micro-acoustic chip transmitter transducer (104). The micro-acoustic chip receiver transducer (101), the first micro-acoustic chip transmitter transducer (102), the second micro-acoustic chip transmitter transducer (103), and the third micro-acoustic chip transmitter transducer (104) are arranged in sequence. The dual-polarized antenna includes: a vertically polarized antenna structure (2) and a horizontally polarized antenna structure (3); The vertically polarized antenna structure (2) is connected to the receiving end (4) of the micro-acoustic chip, and the horizontally polarized antenna structure (3) is connected to the transmitting end (5) of the micro-acoustic chip.

2. The anti-metal burble dual-port microsound marker of claim 1, wherein: The micro-acoustic chip receiver transducer (101), the first micro-acoustic chip transmitter transducer (102), the second micro-acoustic chip transmitter transducer (103), and the third micro-acoustic chip transmitter transducer (104) are connected to a micro-acoustic chip busbar electrode plate (106), and the micro-acoustic chip busbar electrode plate (106) is connected to a dual-polarized antenna through a conductive metal.

3. The anti-metal burble dual port microsire identifier of claim 1, wherein: The micro-acoustic chip receiver transducer (101), the first micro-acoustic chip transmitter transducer (102), the second micro-acoustic chip transmitter transducer (103), and the third micro-acoustic chip transmitter transducer (104) are connected in parallel.

4. The anti-metal burble dual-port microsound marker of claim 1, wherein: The polarization directions of the vertically polarized antenna structure (2) and the horizontally polarized antenna structure (3) are 90 degrees apart.

5. The anti-metal burble dual-port microsound marker of claim 1, wherein: The unidirectional single-phase transducer employs an interdigital transducer with an internally distributed reflective grid array.

6. The anti-metal burble dual-port microsound marker of claim 1, wherein: The micro-acoustic chip piezoelectric semiconductor substrate (105) is a 128-cut lithium niobate piezoelectric substrate.

7. The anti-metal burble dual port microsire identifier of claim 1, wherein: The radar connected to the dual-port micro-acoustic marker signal uses a second dual-polarized antenna. The radar's transmitting port is connected to the vertically polarized antenna of the second dual-polarized antenna, and the radar's receiving port is connected to the horizontally polarized antenna of the second dual-polarized antenna.

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