High-isolation dual-polarized microstrip antenna and communication equipment

Abstract

The utility model relates to a high-isolation dual-polarized microstrip antenna and communication equipment. The high-isolation dual-polarized microstrip antenna comprises a radiation patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer and a grounding layer which are stacked in sequence. The high-isolation dual-polarized microstrip antenna further comprises a first feed probe and a second feed probe, the first feed probe penetrates through the second dielectric layer and is connected with the first feed point of the excitation cancellation layer, and the second feed probe penetrates through the second dielectric layer and is connected with the second feed point of the excitation cancellation layer. The excitation cancellation layer is used for adjusting the amplitude and phase of a transmission signal between the first feeding point and the second feeding point so as to suppress electromagnetic coupling between the first feeding point and the second feeding point. By adopting the high-isolation dual-polarization microstrip antenna, high-polarization isolation can be realized.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a high-isolation dual-polarized microstrip antenna and communication device. Background Technology

[0002] With the rapid development of modern mobile communication technology, satellite communication is gradually becoming the main form of 6G communication. As the core of satellite communication technology, high-performance antenna elements are a key research direction in phased array antenna systems. Among these, antennas with high polarization isolation and low coupling are particularly important. Commercial satellite communication frequency bands are concentrated in the Ku and Ka bands, representing a significant increase in frequencies compared to the 4G and 5G eras. Against this backdrop, the isolation of antenna elements designed using traditional methods is no longer sufficient to meet the high-performance requirements of satellite communication antenna systems.

[0003] Currently, the two main methods used in the industry for dual-polarized microstrip antennas are dual-point probe feeding and dual-slot coupling feeding. Although dual-point probe feeding has a simple structure and is easy to manufacture, its polarization isolation is low, usually below -20dB. While dual-slot coupling feeding can achieve polarization isolation of over -20dB, its structure is complex, has many layers, is sensitive to grounding, and is more difficult to design and manufacture.

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

[0005] Therefore, it is necessary to provide a high-isolation dual-polarized microstrip antenna and communication device.

[0006] In a first aspect, this application provides a high-isolation dual-polarized microstrip antenna, which includes a radiating patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer and a ground layer stacked sequentially.

[0007] The high-isolation dual-polarized microstrip antenna also includes a first feed probe and a second feed probe. The first feed probe passes through the second dielectric layer and is connected to the first feed point of the excitation cancellation layer. The second feed probe passes through the second dielectric layer and is connected to the second feed point of the excitation cancellation layer. The excitation cancellation layer is used to adjust the amplitude and phase of the transmitted signal between the first feed point and the second feed point to suppress electromagnetic coupling between the first feed point and the second feed point.

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

[0009] The coupling feed line includes a first feed point and a second feed point. The coupling feed line is used to couple and feed the radiating patch under the action of the first feed probe and the second feed probe. The amplitude adjustment line is connected to the coupling feed line and is used to adjust the amplitude of the signal transmitted between the first feed point and the second feed point. The phase adjustment line is connected to the amplitude adjustment line and is used to adjust the phase of the signal transmitted between the first feed point and the second feed point.

[0010] In one embodiment, the coupled power supply line includes a first power supply branch and a second power supply branch, with the first power supply point located at the first power supply branch and the second power supply point located at the second power supply branch. The first power supply branch and the second power supply branch are arranged axially symmetrically.

[0011] In one embodiment, the amplitude adjustment strip includes a first adjustment strip and a second adjustment strip. The first adjustment strip is connected to a first feed stub, and the second adjustment strip is connected to a second feed stub. The phase adjustment strip is respectively connected to the first adjustment strip and the second adjustment strip. The first adjustment strip and the second adjustment strip are arranged axially symmetrically.

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

[0013] In one embodiment, the coupling feed line, amplitude adjustment line, and phase adjustment line are disposed on the same layer.

[0014] In one embodiment, at least two of the coupling feed line, amplitude adjustment line, and phase adjustment line are disposed on different layers.

[0015] In one embodiment, the first feed probe also penetrates the first dielectric layer and is connected to the radiating patch, and the second feed probe also penetrates the first dielectric layer and is connected to the radiating patch.

[0016] In one embodiment, the grounding layer includes a first via and a second via, a first feed probe is connected to a feed wire through the first via, and a second feed probe is connected to a feed wire through the second via.

[0017] Secondly, this application also provides a communication device, which includes a high-isolation dual-polarized microstrip antenna as described in the above embodiments.

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

[0019] To address the drawbacks of traditional dual-point probe-fed antennas, such as uneven current distribution, poor electric field orthogonality leading to severe electromagnetic coupling, and dual-slot coupled antennas, which suffer from complex structures and ground sensitivity causing mutual interference of polarization signals, an excitation cancellation layer is introduced. This layer not only utilizes amplitude and phase adjustment structures to precisely control the amplitude and phase of the transmitted signal, ensuring that interfering signals have equal amplitude and opposite phase, thus canceling each other out, but also significantly improves polarization isolation. Furthermore, it simplifies the structural complexity to some extent, making it easier to design and fabricate compared to dual-slot coupled antennas. Simultaneously, the high polarization isolation reduces signal interference, improving the signal quality and transmission efficiency of the communication system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0022] Figure 2 This is a schematic diagram of the excitation cancellation layer in one embodiment;

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

[0024] Figure 4 This is a schematic diagram of the structure of a high-isolation dual-polarized microstrip antenna in another embodiment. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. 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 is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0029] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0030] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0031] In one exemplary embodiment, such as Figure 1 As shown, this application provides a high-isolation dual-polarized microstrip antenna, which includes a radiating patch 2, a first dielectric layer 4, an excitation cancellation layer 6, a second dielectric layer 8, and a ground layer 10 stacked sequentially. The high-isolation dual-polarized microstrip antenna also includes a first feed probe 12 and a second feed probe 14. The first feed probe 12 penetrates the second dielectric layer 8 and connects to a first feed point K1 of the excitation cancellation layer 6. The second feed probe 14 penetrates the second dielectric layer 8 and connects to a second feed point K2 of the excitation cancellation layer 6. The excitation cancellation layer 6 is used to adjust the amplitude and phase of the transmitted signal between the first feed point K1 and the second feed point K2 to suppress electromagnetic coupling between the first feed point K1 and the second feed point K2.

[0032] For example, in a traditional dual-point probe-fed antenna, the current distribution on the radiating patch 2 is not uniform during dual-point probe feeding. Since the probe position is fixed, it is difficult to achieve ideal orthogonality in the electric field distribution across different polarization directions. When a signal is transmitted in one polarization direction, its electric field generates an uneven current distribution on the patch, causing some current to leak into the transmission path of the other polarization direction, forming electromagnetic coupling and thus reducing polarization isolation. For a dual-slot coupled-feed antenna, the dual-slot coupled-feed structure has many layers, and its complex structure makes grounding design difficult. Even small changes in grounding can affect the current distribution and transmission characteristics, thus interfering with the independence of signals of different polarizations. For example, changes in the resistance, inductance, and other parameters of the grounding layer 10 can cause the current of one polarization signal to generate additional electromagnetic induction in the grounding path, coupling into the transmission line of another polarization signal and reducing polarization isolation. Therefore, based on the above reasons, this application proposes to design an excitation cancellation layer 6 to equalize and cancel the unbalanced field generated by the antenna during operation, thereby achieving higher isolation between the two polarizations.

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

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

[0035] The aforementioned high-isolation dual-polarized microstrip antenna addresses the shortcomings of traditional dual-point probe-fed antennas, such as uneven current distribution, poor electric field orthogonality leading to severe electromagnetic coupling, and dual-slot coupled antennas, which suffer from complex structures and ground sensitivity causing mutual interference between polarization signals. It introduces an excitation cancellation layer 6. This design not only utilizes amplitude and phase adjustment structures to precisely control the amplitude and phase of the transmitted signal, ensuring that interfering signals have equal amplitude and opposite phase, thus canceling each other out and greatly improving polarization isolation, but also simplifies the structural complexity to some extent, making it easier to design and fabricate compared to dual-slot coupled antennas. Simultaneously, high polarization isolation reduces signal interference, improving the signal quality and transmission efficiency of the communication system.

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

[0037] For example, the equivalent circuit diagram formed based on the above-mentioned coupled feed line 62, amplitude adjustment line 64 and phase adjustment line 66 is as follows: Figure 3 As shown, the coupling feed line 62 and the radiating patch 2 form equivalent capacitances C1 and C2, the amplitude adjustment line 64 forms equivalent amplitude modulators U1 and U2, and the phase adjustment line 66 forms an equivalent phase shifter Q1. When the first feed probe 12 inputs signal A to the first feed point K1, signal A is coupled to the radiating patch 2 and simultaneously coupled to the second feed point K2. At this time, signal A coupled to the second feed point K2 will interfere with signal B input to the second feed probe 14 to the second feed point K2. The equivalent amplitude modulator formed by amplitude adjustment stripline 64 and the equivalent phase shifter formed by phase adjustment stripline 66 adjust the signal A transmitted to the second feed point K2 via amplitude adjustment stripline 64 and phase adjustment stripline 66, so that the amplitude of the signal A transmitted to the second feed point K2 via the transmission link is equal to the amplitude of the signal A coupled to the second feed point K2, but the phase is opposite. This allows the signal A transmitted to the second feed point K2 via the transmission link to suppress or even cancel the interference of the signal A coupled to the second feed point K2 on the signal B. Similarly, the interference of the signal B on the signal A can also be suppressed or even canceled in a similar way. This will not be elaborated further here, thereby achieving high isolation of the dual-polarized microstrip antenna.

[0038] In this embodiment, the excitation cancellation layer 6 consists of a coupling feed line 62, an amplitude adjustment line 64, and a phase adjustment line 66. The coupling feed line 62 effectively couples power to the radiating patch 2 under the action of the feed probe, ensuring normal antenna operation. The amplitude adjustment line 64 and the phase adjustment line 66 serve as an equivalent amplitude modulator and an equivalent phase shifter, respectively, allowing precise adjustment of the amplitude and phase of the transmitted signal between the first and second feed points. When signals from different feed points interfere with each other, the interference signal arriving at another feed point through a specific transmission link can have the same amplitude and opposite phase as the directly coupled interference signal, thus mutually suppressing or even canceling the interference. This not only effectively solves the problem of low polarization isolation in traditional dual-polarized microstrip antennas but also simultaneously suppresses interference between signals, significantly improving the performance and communication quality of the dual-polarized microstrip antenna.

[0039] In one exemplary embodiment, such as Figure 2 As shown, the coupled power supply line 62 includes a first power supply branch 622 and a second power supply branch 624. The first power supply point K1 is located at the first power supply branch 622, and the second power supply point K2 is located at the second power supply branch 624. The first power supply branch 622 and the second power supply branch 624 are arranged axially symmetrically.

[0040] For example, the axisymmetric structural design ensures that the feed stubs corresponding to the two feed points have good spatial symmetry during antenna operation, allowing the input signal to generate a more uniform electric field and current distribution on the radiating patch 2. This not only improves the antenna's radiation efficiency but also reduces signal transmission differences caused by structural asymmetry. Simultaneously, the symmetrical structure facilitates more precise adjustment of signal amplitude and phase. When using amplitude adjustment stripline 64 and phase adjustment stripline 66 for control, this symmetry allows for more stable amplitude and phase matching of the transmitted signal between the two feed points, thereby more effectively suppressing electromagnetic coupling, enhancing the polarization isolation performance of the dual-polarized microstrip antenna, and improving the overall antenna performance and communication quality.

[0041] In one exemplary embodiment, such as Figure 2 As shown, the amplitude adjustment strip 64 includes a first adjustment strip 642 and a second adjustment strip 644. The first adjustment strip 642 is connected to the first feed stub 622, and the second adjustment strip 644 is connected to the second feed stub 624. The phase adjustment strip 66 is connected to the first adjustment strip 642 and the second adjustment strip 644 respectively. The first adjustment strip 642 and the second adjustment strip 644 are arranged axially symmetrically.

[0042] For example, the amplitude adjustment stripline 64 is divided into a first adjustment stripline 642 and a second adjustment stripline 644 arranged symmetrically on an axis, connecting the first feed stub 622 and the second feed stub 624 respectively, while the phase adjustment stripline 66 connects the two. This symmetrical structural design ensures the consistency and balance of the signal during transmission. On the one hand, the symmetrical first adjustment stripline 642 and the second adjustment stripline 644 can perform balanced amplitude adjustment on signals from different feed stubs, enabling more precise matching of signal amplitudes in the two polarization directions and reducing interference caused by amplitude differences. On the other hand, through the connection of the phase adjustment stripline 66 to them, the phase of the signal in the two polarization directions can be effectively controlled, making it easier for the signal phase to meet the requirements of interference suppression. Overall, this design can more efficiently adjust the amplitude and phase of the transmitted signal between the first feed point K1 and the second feed point K2, enhance the suppression capability of electromagnetic coupling, and thus significantly improve the polarization isolation of the dual-polarized microstrip antenna, improving the performance and stability of the antenna in the communication system.

[0043] In one exemplary embodiment, the length of the phase adjustment strip 66 is half a wavelength.

[0044] For example, a phase adjustment strip 66 with a length of half a wavelength can introduce the required phase change during signal transmission. When the signal from the first feed point K1 is transmitted to the second feed point K2, this phase adjustment strip 66 can create a 180° phase difference in the signal. When the dual-polarized microstrip antenna is operating, this phase difference ensures that the signal transmitted to the second feed point K2 via the phase adjustment strip 66 is exactly out of phase with the interference signal directly coupled to the second feed point K2. Combined with the amplitude adjustment strip 64's adjustment of the signal amplitude, interference signals can be mutually canceled under the condition of equal amplitude and opposite phase, greatly suppressing electromagnetic coupling between the first and second feed 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 communication more stable and reliable.

[0045] In one exemplary embodiment, such as Figure 4 As shown, the coupling feed line 62, the amplitude adjustment line 64, and the phase adjustment line 66 are arranged on the same layer.

[0046] For example, from a manufacturing process perspective, placing the coupling feed line 62, amplitude adjustment line 64, and phase adjustment line 66 on the same layer greatly simplifies the antenna manufacturing process, reduces the processing complexity and precision control challenges associated with multi-layer structures, lowers production costs, and improves production efficiency, thus facilitating large-scale antenna production. In terms of performance, the same layer arrangement results in shorter and more direct signal transmission paths between the lines, reducing potential signal loss and interference during inter-layer transmission and enabling more efficient collaborative operation. This facilitates more precise adjustment of signal amplitude and phase, quickly suppresses electromagnetic coupling between the first feed point K1 and the second feed point K2, thereby improving the polarization isolation of the dual-polarized microstrip antenna, ensuring stable and high-quality signal transmission during communication, and enhancing the antenna's adaptability and reliability in complex communication environments.

[0047] In one exemplary embodiment, at least two of the coupling feed line 62, amplitude adjustment line 64, and phase adjustment line 66 are disposed on different layers.

[0048] For example, when at least two of the coupled feed line 62, amplitude adjustment line 64, and phase adjustment line 66 are arranged on different layers, signal transmission can be achieved through electromagnetic coupling, greatly improving the flexibility of the antenna structure. Each line can be optimally arranged on different layers according to its functional and performance requirements, avoiding mutual interference. From an electromagnetic compatibility perspective, the arrangement on different layers can reduce direct electromagnetic interference between the lines, as each line operates in different spaces, effectively reducing mutual coupling interference, optimizing the signal transmission environment, and improving signal quality. In terms of performance optimization, the arrangement on different layers provides more possibilities for signal conditioning. Different layers have different electromagnetic characteristics, which can be used to perform more precise amplitude and phase adjustment of the signal, thereby further suppressing electromagnetic coupling between feed points and improving polarization isolation. In terms of structural design, this approach is more flexible, allowing adjustment of the layer and relative position of each line according to actual needs, adapting to different application scenarios and antenna size limitations, enabling antenna design to better meet diverse communication requirements.

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

[0050] For example, both the first feed probe 12 and the second feed probe 14 penetrate the first dielectric layer 4 and are connected to the radiating patch 2. This connection method can directly and efficiently transmit the signal from the feed probe to the radiating patch 2, reducing signal loss and interference during transmission and ensuring signal integrity and stability. This direct connection allows the radiating patch 2 to receive and radiate signals more effectively, improving the antenna's radiation efficiency. Simultaneously, the first dielectric layer 4 provides good isolation and support, ensuring a reliable connection between the feed probe and the radiating patch 2 while optimizing the antenna's electromagnetic performance and enhancing its anti-interference capability. This enables the dual-polarized microstrip antenna to transmit and radiate signals in different polarization directions more stably during operation, thereby improving the overall performance and polarization isolation of the antenna and providing a strong guarantee for achieving high-quality communication.

[0051] In one exemplary embodiment, such as Figure 4 As shown, the grounding layer 10 includes a first through hole S1 and a second through hole S2. The first feed probe 12 is connected to the feed line through the first through hole S1, and the second feed probe 14 is connected to the feed line through the second through hole S2.

[0052] For example, the ground layer 10 serves as a stable potential reference surface. If the first feed probe 12 and the second feed probe 14 are directly connected to the ground layer 10, the signal will be directly short-circuited by the ground layer 10 and cannot be transmitted normally to the radiating patch 2, thus rendering the antenna ineffective. Therefore, by connecting the first feed probe 12 to the feed line through the first through-hole S1 and the second feed probe 14 to the feed line through the second through-hole S2, the problem of signal short-circuiting is avoided, ensuring that the signal can be transmitted to the radiating patch 2 along the correct path, achieving effective signal radiation. At the same time, connecting the feed line and the feed probe through through-holes can also reduce interference during signal transmission and improve signal transmission quality. Secondly, the through-hole connection method makes the layout of the feed probe, feed line, and ground layer 10 more reasonable and compact, effectively utilizing space and avoiding the structural chaos and signal transmission problems that may result from direct connection between the feed probe and the ground layer 10. This enhances the stability and reliability of the overall antenna structure and lays a good structural foundation for the antenna to achieve efficient signal transmission and radiation.

[0053] In one exemplary embodiment, this application also provides a communication device, which includes a high-isolation dual-polarized microstrip antenna as described in the above embodiments.

[0054] The aforementioned communication equipment, by employing the high-isolation dual-polarized microstrip antenna in the above embodiments, effectively suppresses crosstalk between signals of different polarizations during communication based on the high polarization isolation characteristic of the high-isolation dual-polarized microstrip antenna, significantly improves signal quality, avoids signal distortion and bit errors, and ensures stable and reliable communication. Even in a complex and ever-changing electromagnetic environment, the communication equipment can maintain good operating conditions.

[0055] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A high-isolation dual-polarized microstrip antenna, characterized in that, The high-isolation dual-polarized microstrip antenna comprises, in sequence, a radiation patch, a first dielectric layer, an excitation cancellation layer, a second dielectric layer, and a ground layer. The high-isolation dual-polarized microstrip antenna further comprises a first feed probe and a second feed probe, the first feed probe is connected with a first feed point of the excitation cancellation layer through the second dielectric layer, the second feed probe is connected with a second feed point of the excitation cancellation layer through the second dielectric layer, and the excitation cancellation layer is used to adjust the amplitude and phase of the transmission signal between the first feed point and the second feed point to suppress the electromagnetic coupling between the first feed point and the second feed point.

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

3. The high-isolation dual-polarized microstrip antenna according to claim 2, characterized in that The coupling feed strip line comprises a first feed branch and a second feed branch, the first feed point is arranged on the first feed branch, and the second feed point is arranged on the second feed branch; and the first feed branch and the second feed branch are arranged in axial symmetry.

4. The high-isolation dual-polarized microstrip antenna according to claim 3, characterized in that The amplitude adjustment strip line comprises a first adjustment strip line and a second adjustment strip line, the first adjustment strip line is connected with the first feed branch, the second adjustment strip line is connected with the second feed branch, and the phase adjustment strip line is connected with the first adjustment strip line and the second adjustment strip line respectively; and the first adjustment strip line and the second adjustment strip line are arranged in axial symmetry.

5. The high-isolation dual-polarized microstrip antenna according to claim 2, wherein, The length of the phase adjustment strip line is one-half wavelength.

6. The high-isolation dual-polarized microstrip antenna according to claim 2, wherein, The coupling feed strip line, the amplitude adjustment strip line, and the phase adjustment strip line are arranged on the same layer.

7. The high-isolation dual-polarized microstrip antenna according to claim 2, wherein, At least two of the coupling feed strip line, the amplitude adjustment strip line, and the phase adjustment strip line are arranged on different layers.

8. The high-isolation dual-polarized microstrip antenna according to claim 1, wherein, The first feed probe is further connected with the radiation patch through the first dielectric layer, and the second feed probe is further connected with the radiation patch through the first dielectric layer.

9. The high-isolation dual-polarized microstrip antenna according to claim 1, wherein, The ground layer comprises a first through hole and a second through hole, the first feed probe is connected with a feed line through the first through hole, and the second feed probe is connected with the feed line through the second through hole.

10. A communication device, characterized by The communication device comprises the high-isolation dual-polarized microstrip antenna according to any one of claims 1-9.

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