High isolation dual polarization microstrip antenna and communication equipment

Abstract

The present application relates to a high-isolation dual-polarization microstrip antenna and communication equipment, wherein the high-isolation dual-polarization microstrip antenna comprises a radiation patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer and a ground layer stacked in sequence. The high-isolation dual-polarization microstrip antenna also comprises a first feeding probe and a second feeding probe, wherein the first feeding probe penetrates the second dielectric layer and is connected to the first feeding point of the excitation cancellation layer, and the second feeding probe penetrates the second dielectric layer and is connected to the second feeding point of the excitation cancellation layer, and the excitation cancellation layer is used to adjust the amplitude and phase of the signal transmitted between the first feeding point and the second feeding point to suppress the electromagnetic coupling between the first feeding point and the second feeding point. The high-isolation dual-polarization microstrip antenna can achieve high polarization isolation.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a high-isolation dual-polarization microstrip antenna and communication equipment. Background Art

[0002] As modern mobile communication technology is booming, satellite communication is gradually becoming the main form of 6G communication. Phased array technology is the core of satellite communication technology. In its phased array antenna feed system, high-performance antenna units are the key research direction. Among them, antennas with high polarization isolation and low coupling are the focus of research. The commercial satellite communication frequency bands are concentrated in the Ku and Ka frequencies, which are greatly increased compared to the frequencies in the 4G and 5G eras. In this context, the isolation of antenna units designed by traditional methods can no longer meet the high performance requirements of satellite communication antenna systems.

[0003] At present, the dual-polarization microstrip antennas commonly used in the industry mainly adopt two methods: dual-point probe feeding and dual-slot coupling feeding. Although the dual-point probe feeding has a simple structure and easy manufacturing process, its polarization isolation is low, usually within -20dB; although the polarization isolation of the dual-slot coupling feeding can reach more than -20dB, its structure is complex, with many layers, and it is sensitive to grounding, and its design and manufacturing process are difficult.

[0004] Therefore, it is urgent to develop a new type of antenna that has both high polarization isolation and optimized manufacturing process. Summary of the invention

[0005] Based on this, it is necessary to provide a high-isolation dual-polarization microstrip antenna and communication equipment.

[0006] In a first aspect, the present application provides a high-isolation dual-polarization microstrip antenna, the high-isolation dual-polarization microstrip antenna comprising a radiation patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer and a ground layer stacked in sequence;

[0007] Among them, the high-isolation dual-polarization microstrip antenna also includes a first feeding probe and a second feeding probe. The first feeding probe penetrates the second dielectric layer and is connected to the first feeding point of the excitation cancellation layer. The second feeding probe penetrates the second dielectric layer and is connected to the second feeding point of the excitation cancellation layer. The excitation cancellation layer is used to adjust the amplitude and phase of the transmission signal between the first feeding point and the second feeding point to suppress the electromagnetic coupling between the first feeding point and the second feeding point.

[0008] In one embodiment, the excitation cancellation layer includes a coupled feed stripline, an amplitude adjustment stripline, and a phase adjustment stripline;

[0009] Among them, the coupled feeding strip line includes a first feeding point and a second feeding point, and the coupled feeding strip line is used to couple and feed the radiation patch under the action of the first feeding probe and the second feeding probe; the amplitude adjustment strip line is connected to the coupled feeding strip line, and the amplitude adjustment strip line is used to adjust the amplitude of the signal transmitted between the first feeding point and the second feeding point; the phase adjustment strip line is connected to the amplitude adjustment strip line, and the phase adjustment strip line is used to adjust the phase of the signal transmitted between the first feeding point and the second feeding point.

[0010] In one embodiment, the coupled feed strip line includes a first feed branch and a second feed branch, the first feed point is arranged at the first feed branch, the second feed point is arranged at the second feed branch, and the first feed branch and the second feed branch are arranged axially symmetrically.

[0011] In one embodiment, the amplitude adjustment strip line includes a first adjustment strip line and a second adjustment strip line, the first adjustment strip line is connected to the first feeding branch node, the second adjustment strip line is connected to the second feeding branch node, the phase adjustment strip line is respectively connected to the first adjustment strip line and the second adjustment strip line, and the first adjustment strip line and the second adjustment strip line are axially symmetrically arranged.

[0012] In one embodiment, the length of the phase adjustment stripline is half a wavelength.

[0013] In one embodiment, the coupling feed strip line, the amplitude adjustment strip line and the phase adjustment strip line are arranged on the same level.

[0014] In one embodiment, at least two of the coupling feed strip line, the amplitude adjustment strip line and the phase adjustment strip line are arranged at different levels.

[0015] In one embodiment, the first feeding probe further penetrates the first dielectric layer and is connected to the radiation patch, and the second feeding probe further penetrates the first dielectric layer and is connected to the radiation patch.

[0016] In one embodiment, the ground layer includes a first through hole and a second through hole, the first feeding probe is connected to the feeding line through the first through hole, and the second feeding probe is connected to the feeding line through the second through hole.

[0017] In a second aspect, the present application further provides a communication device, the communication device comprising the high-isolation dual-polarization microstrip antenna as in the above embodiment.

[0018] The above-mentioned high-isolation dual-polarization microstrip antenna and communication device have at least the following beneficial effects:

[0019] In view of the shortcomings of uneven current distribution and poor orthogonality of the electric field in traditional double-point probe feed antennas, which lead to serious electromagnetic coupling, as well as complex structure and sensitive grounding of double-slit coupled feed antennas, which lead to mutual interference of polarized signals, the introduction of the excitation cancellation layer can not only use the amplitude adjustment structure and phase adjustment structure to accurately adjust the amplitude and phase of the transmission signal respectively, so that the interference signals have equal amplitudes and opposite phases, thus canceling each other out, greatly improving the polarization isolation, but also simplifying the structural complexity to a certain extent, making it easier to design and manufacture than double-slit coupled feed antennas. At the same time, high polarization isolation can reduce signal interference and improve the signal quality and transmission efficiency of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a high-isolation dual-polarization microstrip antenna in one embodiment;

[0022] Figure 2 A schematic diagram of the structure of an excitation cancellation layer in one embodiment;

[0023] Figure 3 for Figure 2 The equivalent circuit diagram of the excitation cancellation layer shown;

[0024] Figure 4 FIG. 4 is a schematic diagram of the structure of a high-isolation dual-polarization microstrip antenna in another embodiment. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0028] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0029] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0030] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0031] In an exemplary embodiment, Figure 1 As shown, the present application provides a high-isolation dual-polarization microstrip antenna, which includes a radiation patch 2, a first dielectric layer 4, an excitation cancellation layer 6, a second dielectric layer 8 and a ground layer 10 stacked in sequence. The high-isolation dual-polarization microstrip antenna also includes a first feeding probe 12 and a second feeding probe 14, the first feeding probe 12 penetrates the second dielectric layer 8 and is connected to the first feeding point K1 of the excitation cancellation layer 6, the second feeding probe 14 penetrates the second dielectric layer 8 and is connected to the second feeding point K2 of the excitation cancellation layer 6, and the excitation cancellation layer 6 is used to adjust the amplitude and phase of the signal transmitted between the first feeding point K1 and the second feeding point K2 to suppress the electromagnetic coupling between the first feeding point K1 and the second feeding point K2.

[0032] For example, for a conventional two-point probe-fed antenna, when the two-point probe is fed, the current distribution on the radiation patch 2 is not uniform enough. Due to the fixed position of the probe, it is difficult to achieve ideal orthogonality in the electric field distribution in different polarization directions. When a signal in one polarization direction is transmitted, its electric field will produce uneven current distribution on the patch, causing part of the current to leak into the transmission path of another polarization direction, forming electromagnetic coupling, thereby reducing polarization isolation. For a double-slit coupled feeding antenna, the double-slit coupled feeding structure has many layers, and its complex structure makes grounding design difficult. Slight changes in grounding will affect the distribution and transmission characteristics of the current, thereby interfering with the independence of different polarization signals. For example, changes in parameters such as resistance and inductance of the grounding layer 10 will cause the current of a polarization signal to generate additional electromagnetic induction on the grounding path, coupled to the transmission line of another polarization signal, and reduce polarization isolation. Therefore, based on the above reasons, the present application proposes to design an excitation cancellation layer 6 to balance and cancel the unbalanced field generated by the antenna during operation to achieve higher isolation of the two polarizations.

[0033] Specifically, Figure 1As shown, assuming that a signal A is input to the first feeding point K1 through the first feeding probe 12, and a signal B is input to the second feeding point K2 through the second feeding probe 14, under normal circumstances, under the action of the radiation patch 2, the signal A and the signal B will interfere with each other through electromagnetic coupling, reducing the polarization isolation. In this dual-polarized microstrip antenna, by adding an excitation cancellation layer 6 to adjust the signal amplitude and phase, this electromagnetic coupling can be suppressed to achieve high polarization isolation. For example, by setting an amplitude adjustment structure in the excitation cancellation layer 6, when the signal A is transmitted from the first feeding point K1 to the excitation cancellation layer 6, the amplitude adjustment structure therein will adjust the amplitude of the signal A transmitted to the second feeding point K2 through the electrical signal transmission link of the excitation cancellation layer 6 according to the amplitude of the signal A transmitted to the second feeding point K2 through electromagnetic coupling, so that the amplitudes of the two are equal. For example, the amplitude of signal A leaking to the second feeding point K2 through electromagnetic coupling is 100; and on the excitation cancellation layer 6, based on the adjustment of the amplitude adjustment structure, the amplitude of signal A transmitted to the second feeding point K2 through the electrical signal transmission link of the excitation cancellation layer 6 is also 100. Further, through the phase adjustment structure provided in the excitation cancellation layer 6, in the process of signal A being transmitted from the first feeding point K1 to the second feeding point K2 through the electrical signal transmission link of the excitation cancellation layer 6, the phase adjustment structure on the electrical signal transmission link will adjust the phase of signal A, so that the phase of signal A transmitted to the second feeding point K2 through electromagnetic coupling and the phase of signal A transmitted to the second feeding point K2 through the electrical signal transmission link of the excitation cancellation layer 6 differ by 180°. Based on the principle of electromagnetic wave superposition, when two signals are equal and have a phase difference of 180°, the two signals will cancel each other out. Therefore, based on the modulation of the above-mentioned excitation cancellation layer 6, the amplitude of the signal A transmitted to the second feeding point K2 via electromagnetic coupling and the signal A transmitted to the second feeding point K2 via the electrical signal transmission link of the excitation cancellation layer 6 are equal and the phase difference is 180°, so that they can suppress or even cancel each other out. Similarly, the signal B transmitted to the first feeding point K1 via electromagnetic coupling can also be suppressed or even canceled out, thereby realizing high polarization isolation of the dual-polarization microstrip antenna.

[0034] Secondly, in this embodiment, the first feeding probe 12 and the second feeding probe 14 are only connected to the feeding point of the excitation cancellation layer 6 and coupled to the radiation patch 2, which can further improve the bandwidth of the dual-polarization microstrip antenna.

[0035] The above-mentioned high-isolation dual-polarized microstrip antenna introduces an excitation cancellation layer 6 to address the drawbacks of uneven current distribution and poor orthogonality of the electric field in the traditional dual-point probe feeding antenna, which leads to serious electromagnetic coupling, and the complex structure and ground sensitivity of the double-slit coupled feeding antenna, which leads to mutual interference of polarization signals. This design can not only use the amplitude adjustment structure and the phase adjustment structure to accurately adjust the amplitude and phase of the transmission signal respectively, so that the interference signals have equal amplitudes and opposite phases, thereby canceling each other out, greatly improving the polarization isolation, but also simplify the structural complexity to a certain extent, making it easier to design and manufacture than the double-slit coupled feeding antenna. At the same time, high polarization isolation can reduce signal interference and improve the signal quality and transmission efficiency of the communication system.

[0036] In an exemplary embodiment, Figure 2 As shown, the excitation cancellation layer 6 includes a coupling feeding strip line 62, an amplitude adjustment strip line 64 and a phase adjustment strip line 66. The coupling feeding strip line 62 includes a first feeding point K1 and a second feeding point K2, and the coupling feeding strip line 62 is used to couple and feed the radiation patch 2 under the action of the first feeding probe 12 and the second feeding probe 14; the amplitude adjustment strip line 64 is connected to the coupling feeding strip line 62, and the amplitude adjustment strip line 64 is used to adjust the amplitude of the signal transmitted between the first feeding point K1 and the second feeding point K2; the phase adjustment strip line 66 is connected to the amplitude adjustment strip line 64, and the phase adjustment strip line 66 is used to adjust the phase of the signal transmitted between the first feeding point K1 and the second feeding point K2.

[0037] For example, the equivalent circuit diagram formed by the coupling feeding strip line 62, the amplitude adjustment strip line 64 and the phase adjustment strip line 66 is as follows: Figure 3 As shown, the coupling feeding stripline 62 and the radiation patch 2 form equivalent capacitors C1 and C2, the amplitude adjustment stripline 64 forms equivalent amplitude modulators U1 and U2, and the phase adjustment stripline 66 forms an equivalent phase shifter Q1. When the first feeding probe 12 inputs a signal A to the first feeding point K1, the signal A is coupled to the radiation patch 2 and coupled to the second feeding point K2 at the same time. At this time, the signal A coupled to the second feeding point K2 will interfere with the signal B input to the second feeding point K2 by the second feeding probe 14. By means of an equivalent amplitude modulator formed by the amplitude adjustment strip line 64 and an equivalent phase shifter formed by the phase adjustment strip line 66, the signal A transmitted to the second feeding point K2 via the amplitude adjustment strip line 64 and the phase adjustment strip line 66 is adjusted so that the amplitude of the signal A transmitted to the second feeding point K2 via the transmission link is equal to the amplitude of the signal A coupled to the second feeding point K2, but the phase is opposite, so that the signal A transmitted to the second feeding point K2 via the transmission link can suppress or even offset the interference of the signal A coupled to the second feeding point K2 to the signal B. Similarly, the interference of the signal B to the signal A can also be suppressed or even offset in a similar manner as mentioned above, which will not be repeated here, thereby achieving high isolation of the dual-polarized microstrip antenna.

[0038] In this embodiment, the excitation cancellation layer 6 is composed of a coupled feeding strip line 62, an amplitude adjustment strip line 64 and a phase adjustment strip line 66, wherein the coupled feeding strip line 62 can effectively couple and feed the radiation patch 2 under the action of the feeding probe to ensure the normal operation of the antenna. The amplitude adjustment strip line 64 and the phase adjustment strip line 66 serve as an equivalent amplitude modulator and an equivalent phase shifter, respectively, and can accurately adjust the amplitude and phase of the signal transmitted between the first and second feeding points. When the signals input from different feeding points interfere with each other, the interference signal that reaches another feeding point through a specific transmission link can be equal in amplitude and opposite in phase to the interference signal that is directly coupled to the past, thereby suppressing or even canceling the interference with each other, which not only effectively solves the problem of low polarization isolation of traditional dual-polarization microstrip antennas, but also suppresses interference between signals at the same time, significantly improving the performance and communication quality of dual-polarization microstrip antennas.

[0039] In an exemplary embodiment, Figure 2 As shown, the coupled feeding strip line 62 includes a first feeding branch 622 and a second feeding branch 624 . The first feeding point K1 is disposed at the first feeding branch 622 , and the second feeding point K2 is disposed at the second feeding branch 624 . The first feeding branch 622 and the second feeding branch 624 are disposed axially symmetrically.

[0040] For example, the axisymmetric structure design makes the feeding branches corresponding to the two feeding points of the antenna have good symmetry in space when the antenna is working, so that the fed signal can produce a more uniform electric field and current distribution on the radiation patch 2. It is not only beneficial to improve the radiation efficiency of the antenna, but also to reduce the signal transmission difference caused by structural asymmetry. At the same time, the symmetrical structure helps to more accurately adjust the amplitude and phase of the signal. When the amplitude adjustment strip line 64 and the phase adjustment strip line 66 are used for regulation, the amplitude and phase matching of the signal transmitted between the two feeding points can be more stably achieved based on this symmetry, thereby more effectively suppressing electromagnetic coupling, enhancing the polarization isolation performance of the dual-polarized microstrip antenna, and improving the overall performance and communication quality of the antenna.

[0041] In an exemplary embodiment, Figure 2 As shown, the amplitude adjustment strip line 64 includes a first adjustment strip line 642 and a second adjustment strip line 644, the first adjustment strip line 642 is connected to the first feeding branch 622, the second adjustment strip line 644 is connected to the second feeding branch 624, and the phase adjustment strip line 66 is respectively connected to the first adjustment strip line 642 and the second adjustment strip line 644, and the first adjustment strip line 642 and the second adjustment strip line 644 are axially symmetrically arranged.

[0042] Exemplarily, the amplitude adjustment strip line 64 is divided into a first adjustment strip line 642 and a second adjustment strip line 644 arranged axially symmetrically, respectively connecting the first feeding branch 622 and the second feeding branch 624, and the phase adjustment strip line 66 connects the two. This symmetrical structural design ensures the consistency and balance of the signal during transmission. On the one hand, the axisymmetric first adjustment strip line 642 and the second adjustment strip line 644 can perform balanced amplitude adjustment on the signals from different feeding branches, so that the signal amplitudes of the two polarization directions can be more accurately matched, reducing the interference caused by the amplitude difference. On the other hand, through the connection between the phase adjustment strip line 66 and them, the phase of the signals in the two polarization directions can be effectively regulated, so that the signal phase is easier to meet the requirements of interference suppression. On the whole, this design can more efficiently adjust the amplitude and phase of the signal transmitted between the first feeding point K1 and the second feeding point K2, enhance the ability to suppress electromagnetic coupling, and thus significantly improve the polarization isolation of the dual-polarization microstrip antenna, and improve the performance and stability of the antenna in the communication system.

[0043] In an exemplary embodiment, the length of the phase adjustment stripline 66 is one-half wavelength.

[0044] Exemplarily, a phase adjustment stripline 66 with a length of half a wavelength can introduce the required phase change during signal transmission. When the signal from the first feeding point K1 is transmitted to the second feeding point K2, the phase adjustment stripline 66 of this length can cause the signal to produce a phase difference of 180°. When the dual-polarized microstrip antenna is working, this phase difference makes the signal transmitted to the second feeding point K2 via the phase adjustment stripline 66 exactly opposite in phase to the interference signal directly coupled to the second feeding point K2. Combined with the adjustment effect of the amplitude adjustment stripline 64 on the signal amplitude, it is possible to achieve mutual cancellation of interference signals under the conditions of equal amplitude and opposite phase, greatly suppressing the electromagnetic coupling between the first and second feeding points, significantly improving the polarization isolation of the dual-polarized microstrip antenna, ensuring the independence between signals of different polarizations, improving the quality and efficiency of antenna communication, and making the application of dual-polarized microstrip antennas in the field of communications more stable and reliable.

[0045] In an exemplary embodiment, Figure 4 As shown, the coupling feed stripline 62, the amplitude adjustment stripline 64 and the phase adjustment stripline 66 are arranged on the same level.

[0046] For example, from the perspective of manufacturing process, the coupling feed strip line 62, the amplitude adjustment strip line 64 and the phase adjustment strip line 66 are arranged on the same level, which greatly simplifies the manufacturing process of the antenna, reduces the processing complexity and precision control problems caused by the multi-layer structure, reduces the production cost, improves the production efficiency, and is conducive to the large-scale production of the antenna. In terms of performance, the same level setting makes the signal transmission path between the strip lines shorter and more direct, reduces the loss and interference that may be generated when the signal is transmitted between layers, and can work together more efficiently. This helps to more accurately adjust the signal amplitude and phase, quickly suppress the electromagnetic coupling between the first feeding point K1 and the second feeding point K2, thereby improving the polarization isolation of the dual-polarized microstrip antenna, ensuring that the antenna transmits signals stably and with high quality during the communication process, and enhancing the adaptability and reliability of the antenna in complex communication environments.

[0047] In an exemplary embodiment, at least two of the coupling feed stripline 62 , the amplitude adjustment stripline 64 , and the phase adjustment stripline 66 are disposed at different levels.

[0048] Exemplarily, when at least two of the coupled feed stripline 62, the amplitude adjustment stripline 64, and the phase adjustment stripline 66 are arranged at different levels, signal transmission can be performed by electromagnetic coupling, which greatly improves the flexibility of the antenna structure. Each stripline can be optimally laid out at different levels according to its function and performance requirements to avoid mutual interference. From the perspective of electromagnetic compatibility, layouts at different levels can reduce direct electromagnetic interference between striplines, because each stripline works in a different space, which can effectively reduce mutual coupling interference, optimize the signal transmission environment, and improve signal quality. In terms of performance optimization, settings at different levels provide more possibilities for signal adjustment. Different layers have different electromagnetic characteristics, and these characteristics can be used to adjust the amplitude and phase of the signal more accurately, thereby further suppressing electromagnetic coupling between feeding points and improving polarization isolation. In terms of structural design, this method is more flexible, and the level and relative position of each stripline can be adjusted according to actual needs to adapt to different application scenarios and antenna size restrictions, so that the antenna design can better meet diverse communication needs.

[0049] In an exemplary embodiment, the first feeding probe 12 further penetrates the first dielectric layer 4 and is connected to the radiation patch 2 , and the second feeding probe 14 further penetrates the first dielectric layer 4 and is connected to the radiation patch 2 .

[0050] Exemplarily, the first feeding probe 12 and the second feeding probe 14 are both connected to the radiation patch 2 through the first dielectric layer 4. This connection method can directly and efficiently transmit the signal of the feeding probe to the radiation patch 2, reducing the loss and interference of the signal during the transmission process, and ensuring the integrity and stability of the signal. Through this direct connection, the radiation patch 2 can receive and radiate signals more effectively, thereby improving the radiation efficiency of the antenna. At the same time, the first dielectric layer 4 plays a good isolation and support role. While ensuring the reliable connection between the feeding probe and the radiation patch 2, it can also optimize the electromagnetic performance of the antenna and enhance its anti-interference ability. When the dual-polarized microstrip antenna is working, it can more stably transmit and radiate signals in different polarization directions, thereby improving the overall performance and polarization isolation of the antenna, and providing a strong guarantee for achieving high-quality communication.

[0051] In an exemplary embodiment, Figure 4 As shown, the ground layer 10 includes a first through hole S1 and a second through hole S2 , the first feeding probe 12 is connected to the feeding line through the first through hole S1 , and the second feeding probe 14 is connected to the feeding line through the second through hole S2 .

[0052] Exemplarily, the grounding layer 10 is used as a stable potential reference plane. If the first feeding probe 12 and the second feeding probe 14 are directly connected to the grounding layer 10, the signal will be directly short-circuited by the grounding layer 10, and cannot be normally transmitted to the radiation patch 2, so that the antenna cannot work effectively. Therefore, the first feeding probe 12 is connected to the feeding line through the first through hole S1, and the second feeding probe 14 is connected to the feeding line through the second through hole S2, which avoids the problem of signal short circuit, ensures that the signal can be transmitted to the radiation patch 2 along the correct path, and realizes effective radiation of the signal. At the same time, by connecting the feeding line and the feeding probe through the through hole, the interference in the signal transmission process can also be reduced, and the transmission quality of the signal can be improved. Secondly, the layout between the feeding probe, the feeding line and the grounding layer 10 is made more reasonable and compact by the through-hole connection, and the space can be effectively utilized, avoiding the structural confusion and signal transmission problems that may be caused by the direct connection of the feeding probe to the grounding layer 10, enhancing the stability and reliability of the overall structure of the antenna, and laying a good structural foundation for the antenna to achieve efficient signal transmission and radiation.

[0053] In an exemplary embodiment, the present application further provides a communication device, which includes the high-isolation dual-polarization microstrip antenna in the above embodiment.

[0054] The above-mentioned communication equipment, by adopting the high-isolation dual-polarized microstrip antenna in the above-mentioned embodiment, based on the high polarization isolation characteristics of the high-isolation dual-polarized microstrip antenna, effectively suppresses the crosstalk between different polarization signals during communication, significantly improves the signal quality, avoids signal distortion and bit errors, ensures stable and reliable communication, and ensures that the communication equipment can maintain a good operating state even in a complex and changeable electromagnetic environment.

[0055] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A high isolation dual-polarized microstrip antenna, characterized in that: The high isolation dual-polarization microstrip antenna comprises a radiation patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer and a ground layer stacked in sequence; Among them, the high-isolation dual-polarization microstrip antenna also includes a first feeding probe and a second feeding probe, the first feeding probe penetrates the second dielectric layer and is connected to the first feeding point of the excitation cancellation layer, the second feeding probe penetrates the second dielectric layer and is connected to the second feeding point of the excitation cancellation layer, and the excitation cancellation layer is used to adjust the amplitude and phase of the transmission signal between the first feeding point and the second feeding point to suppress the electromagnetic coupling between the first feeding point and the second feeding point.

2. The high isolation dual-polarization microstrip antenna according to claim 1, characterized in that: The excitation cancellation layer includes a coupling feeding strip line, an amplitude adjustment strip line and a phase adjustment strip line; Among them, the coupled feeding strip line includes the first feeding point and the second feeding point, and the coupled feeding strip line is used to couple and feed the radiation patch under the action of the first feeding probe and the second feeding probe; the amplitude adjustment strip line is connected to the coupled feeding strip line, and the amplitude adjustment strip line is used to adjust the amplitude of the signal transmitted between the first feeding point and the second feeding point; the phase adjustment strip line is connected to the amplitude adjustment strip line, and the phase adjustment strip line is used to adjust the phase of the signal transmitted between the first feeding point and the second feeding point.

3. The high isolation dual-polarization microstrip antenna according to claim 2, characterized in that: The coupled feeding strip line includes a first feeding branch and a second feeding branch, the first feeding point is arranged at the first feeding branch, the second feeding point is arranged at the second feeding branch, and the first feeding branch and the second feeding branch are arranged axially symmetrically.

4. The high isolation dual-polarization microstrip antenna according to claim 3, characterized in that: The amplitude adjustment strip line includes a first adjustment strip line and a second adjustment strip line, the first adjustment strip line is connected to the first feeding branch node, the second adjustment strip line is connected to the second feeding branch node, the phase adjustment strip line is respectively connected to the first adjustment strip line and the second adjustment strip line, and the first adjustment strip line and the second adjustment strip line are axially symmetrically arranged.

5. The high isolation dual-polarization microstrip antenna according to claim 2, characterized in that: The length of the phase adjustment strip line is half the wavelength.

6. The high isolation dual-polarization microstrip antenna according to claim 2, characterized in that: The coupling feeding strip line, the amplitude adjustment strip line and the phase adjustment strip line are arranged on the same level.

7. The high isolation dual-polarization microstrip antenna according to claim 2, characterized in that: At least two of the coupling feeding strip line, the amplitude adjustment strip line and the phase adjustment strip line are arranged at different levels.

8. The high isolation dual-polarization microstrip antenna according to claim 1, characterized in that: The first feeding probe also penetrates the first dielectric layer and is connected to the radiation patch, and the second feeding probe also penetrates the first dielectric layer and is connected to the radiation patch.

9. The high isolation dual-polarization microstrip antenna according to claim 1, characterized in that: The ground layer includes a first through hole and a second through hole, the first feeding probe is connected to the feeding line through the first through hole, and the second feeding probe is connected to the feeding line through the second through hole.

10. A communication device, characterized in that: The communication device comprises the high-isolation dual-polarization microstrip antenna as described in any one of claims 1-9.

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