A phased array and array device

Abstract

The application relates to the technical field of communication, and particularly discloses a phased array and array device, which comprises a parasitic patch attached on a first surface of a first dielectric plate; and an excitation patch attached on a second surface of a second dielectric plate, wherein the parasitic patch is located above the excitation patch. The parasitic patch is introduced on the basis of a single patch to expand a single resonance point into double resonance points to increase bandwidth and realize sufficient bandwidth margin. In addition, a suppression gap for suppressing cavity resonance is formed on the first ground surface. The formation of the gap slot on the first ground surface can avoid the resonance in the cavity, widen the broadband, improve the performance of the phased array, lay a foundation for realizing miniaturization and high-density integration, and enable the phased array to be better applied to various millimeter wave communication scenes such as dual linear polarization and circular polarization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a phased array and array device. BACKGROUND

[0002] Microstrip antennas are widely used in modern communication systems due to their simple structure, low manufacturing cost, and good compatibility with integrated circuits. However, existing microstrip antenna technology faces key problems such as narrow bandwidth, poor unit consistency, and difficulty in implementing dual polarization, which restricts its application in high-performance communication systems.

[0003] To address the problem of narrow operating frequency band, three main methods are commonly used for improvement: reducing Q (quality factor) value, modifying equivalent circuit, and improving feeding method. Reducing Q value is usually achieved by selecting a PCB board material with a lower Dk (dielectric constant) value or a larger thickness as the substrate of the antenna radiator. However, a lower Dk value will increase the physical size of the antenna, posing challenges to miniaturization design; while a larger thickness is prone to excite surface waves, deteriorating the antenna radiation performance, thus this method has obvious limitations and the improvement effect is generally poor.

[0004] Modifying the equivalent circuit is mainly achieved by slitting the radiator or introducing a parasitic radiator. Slitting the radiator can widen the bandwidth, but it will face the problem of deteriorating the antenna pattern. Introducing a parasitic radiator can avoid the deterioration of the antenna pattern, which can be divided into two ways: same layer introduction and different layer introduction. Same layer introduction will lead to an increase in the planar size, making it difficult to achieve high-density integration and unable to be effectively applied in array antennas. Different layer introduction is the current optimal solution, but currently square and rectangular radiators are commonly used, which have a more divergent edge field distribution, resulting in serious mutual coupling between units and deteriorating the antenna pattern.

[0005] Improving the feeding method usually adopts slot coupling feeding technology, which uses H-shaped or dog bone-shaped coupling slots, combined with microstrip line or stripline excitation to achieve better impedance matching and expand the bandwidth. However, these special-shaped slots require a large area, making it difficult to be flexibly applied in dual-polarization applications.

[0006] To solve the problem of poor unit consistency, currently, the following technical means are mainly used: EBG (electromagnetic band gap), DGS (defected ground structure), U-shaped stub or irregular stub, etc. to reduce the mutual coupling between units and improve the consistency. EBG achieves the band-stop characteristic by constructing a periodic structure around the radiator, but this structure needs to occupy a large size, which is not conducive to the miniaturization of the antenna, and it is also difficult to arrange between units, and its stop band is usually narrow, which is not suitable for wideband applications. DGS achieves the band-stop characteristic by etching a special-shaped gap structure in the antenna reference ground, but it also has the limitation of narrow stop band. The disadvantages of U-shaped or irregular stub are similar to EBG, which occupies a large size and is difficult to miniaturize, and the stop band is narrow, which is not suitable for wideband applications.

[0007] To solve the problem of dual-polarization implementation, the existing technology mainly adopts two schemes: one is to multiplex one coupling gap with different polarizations, but the feed line is arranged in different layers. This scheme causes mutual influence between different polarizations due to multiplexing the same coupling gap but different feed lines, resulting in high design complexity, poor polarization isolation and consistency. The second scheme is to use different coupling gaps for different polarizations, but the feed line is asymmetrically arranged in the same layer, resulting in poor consistency between polarizations, and the implementation effect of dual-polarization is not ideal.

[0008] The existing related patent technologies also have many shortcomings. For example, please refer to Figure 1 The Chinese patent with the authorization announcement number CN208385625U proposes a millimeter wave patent structure working at 25-32.5GHz, which has wideband capability, but its structure is relatively complex, the patch shape and coupling gap design are relatively complex, and the two feed lines are distributed in different layers, which is easy to cause polarization inconsistency due to processing errors, and at the same time, it does not have the evolution capability of circular polarization scheme.

[0009] Please refer to Figure 2 The Chinese patent with the authorization announcement number CN210744177U proposes a wideband millimeter wave phased array antenna, which uses a circular patch antenna and adopts air cavity loading technology, but the scheme of digging holes in the medium in this patent makes the PCB prone to deformation, which poses a risk to reliability. In addition, this patent is only single-polarization excitation and does not have dual-polarization capability, and at the same time, it also does not have the capability of circular polarization evolution. SUMMARY

[0010] The purpose of the present application is to provide a phased array and array device that avoids the occurrence of resonance in the cavity, improves the bandwidth margin, and thus improves the polarization effect.

[0011] The present application discloses a phased array, comprising: a fourth dielectric plate, a third dielectric plate, a first ground surface, a second dielectric plate and a first dielectric plate which are sequentially stacked in a first direction.

[0012] a parasitic patch disposed on a first surface of the first dielectric plate, wherein the first surface is a surface away from the second dielectric plate;

[0013] an excitation patch disposed on a second surface of the second dielectric plate, wherein the second surface is a surface away from the third dielectric plate, and the parasitic patch and the excitation patch overlap in a first direction in a normal projection;

[0014] a suppression gap for suppressing cavity resonance is formed on the first ground surface;

[0015] a coupling gap is also formed on the first ground surface;

[0016] a first feeding structure is disposed on a third surface of the fourth dielectric plate for generating a polarization signal, wherein the third surface is a surface close to the third dielectric plate.

[0017] Further, the suppression gap comprises a first suppression gap and a second suppression gap;

[0018] the first suppression gap extends along a second direction, and the second suppression gap extends along a third direction,

[0019] the second direction is a length direction of the second dielectric plate, and the third direction is a width direction of the second dielectric plate.

[0020] Further, the shapes of the parasitic patch and the excitation patch include a circle, a rectangle, and an irregular shape.

[0021] Further, it further comprises a grounding frame composed of a rectangular strip, which is disposed around the periphery of the first dielectric plate and grounded through a via hole.

[0022] Further, the coupling gap comprises a first coupling gap and a second coupling gap; and the feeding structure comprises a first feed line and a second feed line;

[0023] The radio frequency signals are fed into the feeding ports of the first feed line and the second feed line respectively, and then coupled through the first coupling gap and the second coupling gap respectively to obtain first coupling signals and second coupling signals;

[0024] The first coupling signals and the second coupling signals are used to excite the excitation patch and the parasitic patch in turn.

[0025] Further, the shapes of the first feed line and the second feed line include an L shape; and the shapes of the first coupling gap and the second coupling gap include a U shape, a rectangle, a circle, and a cross shape.

[0026] Further, projections of the first coupling slot and the second coupling slot along a first direction are symmetrically arranged about a central axis of the parasitic patch and the excitation patch.

[0027] Projections of the first feed line and the second feed line along a first direction are symmetrically arranged about a central axis of the parasitic patch and the excitation patch.

[0028] The first coupling slot and the first feed line intersect after the front projection along the first direction to obtain a first front projection, and the second coupling slot and the second feed line intersect after the front projection along the first direction to obtain a second front projection; the first front projection and the second front projection are mirror-symmetric.

[0029] Further, the array device further comprises a third feed line, a fourth feed line, a first feed hole and a second feed hole.

[0030] The signal feeding end of the third feed line is connected to the signal feeding end of the first feed line through the first feed hole; and the signal feeding end of the fourth feed line is connected to the signal feeding end of the second feed line through the second feed hole.

[0031] Further, the array device further comprises a circular polarization generator.

[0032] The circular polarization generator is used to divide the radio frequency signal into two paths of first and second differential signals with a first phase difference, or into two paths of third and fourth differential signals with a second phase difference; the third feed line is used to receive the first differential signal or the third differential signal, and the fourth feed line is used to receive the second differential signal or the fourth differential signal.

[0033] Further, the package ground hole is arranged around the first feed line, the second feed line, the third feed line, the fourth feed line and the circular polarization generator.

[0034] In another aspect, the application also provides an array device using the phased array.

[0035] Compared with the prior art, the application has at least the following technical effects:

[0036] The application pastes the parasitic patch on the first surface of the first dielectric plate, pastes the excitation patch on the second surface of the second dielectric plate, and the parasitic patch is located above the excitation patch. On the basis of a single patch, the parasitic patch is introduced to expand the single resonance point into a double resonance point to increase the bandwidth and realize sufficient bandwidth margin. In addition, the slot is opened on the first ground surface to avoid the resonance in the cavity, widen the bandwidth, improve the performance of the phased array, lay a foundation for realizing miniaturization and high-density integration, and make the phased array better applied to various millimeter wave communication scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structural schematic diagram of a millimeter wave broadband filtering antenna in the prior art;

[0038] Figure 2 A structural schematic diagram of a millimeter wave phased array antenna in the prior art;

[0039] Figure 3 A structural schematic diagram of a phased array in embodiment one of the present application;

[0040] Figure 4 A frequency response curve in embodiment one of the present application;

[0041] Figure 5 A polarization scheme of 0° or 90° in embodiment one of the present application;

[0042] Figure 6 A polarization scheme of +45° or -45° in embodiment one of the present application;

[0043] Figure 7 A design curve of an n258 frequency band radio frequency signal in embodiment one of the present application;

[0044] Figure 8 Another structural schematic diagram of a phased array in embodiment two of the present application;

[0045] Figure 9 A structural schematic diagram of part of layers in the phased array in embodiment two of the present application;

[0046] Figure 10 A cross-sectional view of part of layers in the phased array in embodiment two of the present application;

[0047] Figure 11 A return loss performance curve of a Ka wave band form in embodiment two of the present application;

[0048] Figure 12 A return loss performance curve of a K wave band form in embodiment two of the present application;

[0049] Figure 13 A structural schematic diagram of an array device in embodiment three of the present application.

[0050] BRIEF DESCRIPTION OF DRAWINGS: fourth dielectric plate 12, third dielectric plate 9, first ground surface 6, second dielectric plate 5, first dielectric plate 3, parasitic patch 1, excitation patch 4, first suppression slot 14, second suppression slot 15, ground enclosure 2, first coupling slot 7, second coupling slot 8, first feed line 10, second feed line 11, third feed line 17, fourth feed line 18, circular polarization generator 24, first feed hole 19, second feed hole 20, signal input point 25, ground-enclosing hole 22, phased array 100, fifth dielectric plate 21, sixth dielectric plate 28, seventh dielectric plate 23, eighth dielectric plate 29, ninth dielectric plate 30, second ground surface 26, third ground surface 27. DETAILED DESCRIPTION

[0051] A phased array and array device according to the present application will now be described in detail, by way of example only, with reference to the accompanying drawings. It is intended that any future application based on the present application will not be limited to the embodiments described in the following description. Rather, the embodiments described herein describe the principles of the application in a manner sufficiently detailed to enable one to practice the application. Those skilled in the art will appreciate that various modifications, substitutions, and changes can be made to the specific embodiments described without departing from the spirit and scope of the application as set forth in the following claims. For example, those skilled in the art will appreciate that the various features of the embodiments described can be combined in any manner to form new technical solutions, and that these modifications and combinations are intended to fall within the scope of the present application.

[0052] The present application will now be described in more detail, by way of example only, with reference to the accompanying drawings. The advantages and features of the present application will become apparent from the following description with reference to the drawings. It is to be understood that the drawings are designed solely for purposes of illustration and are not intended to limit the scope of the present application in any way. Further, the drawings are not drawn to scale and are only intended to conceptually illustrate the objects of the present application.

[0053] Embodiment One

[0054] Referring to Figure 3 The present embodiment discloses a phased array 100, comprising: a fourth dielectric plate 12, a third dielectric plate 9, a first ground surface 6, a second dielectric plate 5, and a first dielectric plate 3 which are sequentially stacked in a first direction.

[0055] The parasitic patch 1 is arranged on the first surface of the first dielectric plate 3, wherein the first surface is the surface away from the second dielectric plate 5; the excitation patch 4 is arranged on the second surface of the second dielectric plate 5, wherein the second surface is the surface away from the third dielectric plate 9, and the parasitic patch 1 and the excitation patch 4 overlap in the first direction; the first ground surface 6 is provided with a suppression slot for suppressing cavity resonance; the first ground surface 6 is also provided with a coupling slot; and the first feeding structure is arranged on the third surface of the fourth dielectric plate 12 for generating a polarization signal, wherein the third surface is the surface close to the third dielectric plate 9.

[0056] It can be understood that the first direction is the vertical direction, which is also the basic direction of the upper and lower stacking commonly recognized.

[0057] In the embodiment, the parasitic patch 1 is arranged on the first surface of the first dielectric plate 3; the excitation patch 4 is arranged on the second surface of the second dielectric plate 5, and the parasitic patch 1 is located above the excitation patch 4; the parasitic patch 1 is introduced on the basis of a single patch to expand the double resonance point from a single resonance point to increase the bandwidth and achieve sufficient bandwidth margin; in addition, the slotting of the first ground surface 6 can avoid the resonance in the cavity to widen the bandwidth, improve the performance of the phased array 100, lay a foundation for realizing miniaturization and high-density integration, and make the phased array 100 better applied to various millimeter wave communication scenes.

[0058] Further, the suppression slot includes a first suppression slot 14 and a second suppression slot 15; the first suppression slot 14 extends along a second direction, and the second suppression slot 15 extends along a third direction; the second direction is the length direction of the second dielectric plate 5, and the third direction is the width direction of the second dielectric plate 5.

[0059] In the embodiment, the first suppression slot 14 disturbs the electromagnetic wave propagating along the length direction, and the second suppression slot 15 disturbs the electromagnetic wave propagating along the width direction, so as to destroy the resonance condition through double orthogonal disturbance. Since the suppression slot is directly arranged on the ground surface layer, no additional space is occupied, and the orthogonal layout can cover the resonance modes of different polarization directions.

[0060] Please refer to Figure 4 The frequency response curve diagram shows that, in the K frequency band, if there is no slot, resonance will occur at a specific frequency point, and the gain will deteriorate.

[0061] In the embodiment, the shape of the parasitic patch 1 and the excitation patch 4 can be selected according to actual conditions, for example, circular, rectangular, and irregular, which are not specifically limited here, and preferably a circular patch is adopted.

[0062] The advantages of the circular structure of the parasitic patch 1 and the excitation patch 4 are as follows: first, the circular structure itself is easy to realize miniaturization, thereby facilitating high-density integration. Second, its inherent symmetry helps to reduce the influence of the surrounding environment on the edge field and improve the performance stability. In addition, it is this symmetry feature that makes it easier to expand from single polarization to dual polarization.

[0063] Further, please refer to Figure 3 , the phased array 100 further comprises a ground enclosure 2 composed of a rectangular strip, which is arranged around the four sides of the first dielectric plate 3 and grounded through a via.

[0064] In the embodiment, the ground enclosure 2 can limit the radiation aperture of the array element, hinder the transmission path of the surface wave, reduce the mutual coupling between the array elements, and improve the consistency of the array elements. The ground enclosure 2 is a non-resonant structure, has no bandwidth limitation, and has a small size, which is convenient for high-density integration and preparation.

[0065] Further, the coupling slot includes a first coupling slot 7 and a second coupling slot 8; and the feed structure includes a first feed line 10 and a second feed line 11.

[0066] Specifically, the radio frequency signals are fed into the feed ports of the first feed line 10 and the second feed line 11, respectively, and then coupled through the first coupling slot 7 and the second coupling slot 8 to obtain first coupling signals and second coupling signals. The first coupling signals and the second coupling signals are used to excite the circular excitation patch 4 and the circular parasitic patch 1 in turn.

[0067] In one specific example, the shape of the first coupling slot 7 and the second coupling slot 8 includes U-shaped, rectangular, circular, and cross-shaped. Of course, those skilled in the art can also adopt other shapes according to actual conditions, which are not specifically limited here.

[0068] In the embodiment, by adjusting the size of the first coupling slot 7 and the second coupling slot 8, the miniaturization of the structure can be effectively realized. In addition, by mirror copying, two consistent feed structures can be realized, thereby expanding from single polarization to dual polarization, cooperating with the circular patch, and realizing the consistency between the two polarizations.

[0069] In another specific example, the first feed line 10 and the second feed line 11 are L-shaped, and of course, those skilled in the art can also adopt other shapes according to actual conditions, which are not specifically limited here.

[0070] Further, please refer to Figure 5 and Figure 6 The projection of the first coupling slot 7 and the second coupling slot 8 in the first direction is symmetrically arranged about the center axis of the parasitic patch 1 and the excitation patch 4;

[0071] The projection of the first feed line 10 and the second feed line 11 in the first direction is symmetrically arranged about the center axis of the parasitic patch 1 and the excitation patch 4;

[0072] The front projection of the first coupling slot 7 and the first feed line 10 in the first direction intersects to obtain a first front projection, and the front projection of the second coupling slot 8 and the second feed line 11 in the first direction intersects to obtain a second front projection; the first front projection and the second front projection are mirror symmetric.

[0073] In this embodiment, thanks to the symmetry of the above structure and the flexible feed design, the excitation mode of this embodiment can not only realize + / -90° (for circular polarization), but also can be configured as + / -45° or other angle excitation to meet different polarization requirements.

[0074] Please refer to Figure 7 The figure shows the design curve of n258 (24.25~27.5G) realized by the above phased array 100. As can be seen from the figure, the return loss required in the frequency band of the two feed ports is below -10dB (Amplitude<4.89dB, Amplitude is amplitude), and a good unit gain (Amplitude>4.89dB) is achieved, and the isolation of the two ports is also greater than 17Db, the overall performance is better, realizing the miniaturization and high performance of wideband.

[0075] It can be understood that the above phased array 100 has good universality, and can be applied to millimeter wave frequency bands including but not limited to n258, and can also be applied to other millimeter wave frequency bands including n257 (26.5~29.5 GHz), which is not limited here.

[0076] In another specific embodiment, the thickness of the above-mentioned dielectric plate determines the design bandwidth of the antenna, which can be set according to actual conditions, which is not limited here.

[0077] Embodiment two

[0078] Based on the same inventive concept, the embodiment discloses another phased array 100, which is further developed on the basis of the phased array 100 disclosed in the first embodiment, and is suitable for the implementation of circular polarization required by current satellite communication scenarios, such as the ka frequency band (reception: 17.7~21.2G, transmission: 27.5~31G) or the Ku frequency band (10~14G) of typical ground communication.

[0079] Please refer to Figure 8-9 The phased array 100 further comprises a third feed line 17, a fourth feed line 18, a first feed hole 19 and a second feed hole 20.

[0080] Specifically, the signal feeding end of the third feed line 17 is connected to the signal feeding end of the first feed line 10 through the first feed hole 19; and the signal feeding end of the fourth feed line 18 is connected to the signal feeding end of the second feed line 11 through the second feed hole 20.

[0081] The circular polarization generator 24 is configured to divide the radio frequency signal into a first differential signal and a second differential signal with a first phase difference, or into a third differential signal and a fourth differential signal with a second phase difference; and the first differential signal and the third differential signal are input into the third feed line 17, and the second differential signal and the fourth differential signal are input into the fourth feed line 18.

[0082] In a specific example, the radio frequency signal is fed from the signal input point 25, and is divided by the circular polarization generator 24 into a first differential signal and a second differential signal with a first phase difference, or into a third differential signal and a fourth differential signal with a second phase difference.

[0083] The first differential signal and the second differential signal are input into the second feed line 11 and the first feed line 10 through the third feed line 17 and the fourth feed line 18 and the first feed hole 19 and the second feed hole 20, respectively; or the third differential signal and the fourth differential signal are input into the second feed line 11 and the first feed line 10 through the third feed line 17 and the fourth feed line 18 and the first feed hole 19 and the second feed hole 20, respectively.

[0084] In this embodiment, the radio frequency signal is divided by the circular polarization generator 24 into a first differential signal and a second differential signal with a first phase difference, or into a third differential signal and a fourth differential signal with a second phase difference, so that the structure can adapt to different forms of polarization, such as left-handed or right-handed.

[0085] In addition, by scaling the overall size of the phased array 100, it can be flexibly adapted to different frequency band application requirements, showing excellent versatility. The phased array 100 also has a wide bandwidth and a compact structure size, realizing the combination of high performance and miniaturization.

[0086] Further, in order to increase the shielding protection of the feed lines, the embodiment also provides a ground wrapping hole 22 arranged around the first feed line 10, the second feed line 11, the third feed line 17, the fourth feed line 18, and the circular polarization generator 24.

[0087] In the embodiment, by forming a shielding structure around the feed lines and the circular polarization generator 24, the electromagnetic shielding effect is effectively enhanced, the interference of external electromagnetic interference on the signal is reduced, the signal transmission quality and stability are improved, and the electromagnetic radiation is reduced.

[0088] In one specific example, please refer to Figure 10 , which shows the third medium plate 9, the fourth medium plate 12, the fifth medium plate 21, the sixth medium plate 28, the seventh medium plate 23, the eighth medium plate 29, and the ninth medium plate 30 stacked in the phased array 100 in turn. A third ground surface 27 is arranged between every two layers of medium plates and at the lower surface of the ninth medium plate 30.

[0089] The first feed hole 19 and the second feed hole 20 are arranged through the third medium plate 9 to the ninth medium plate 30. The second feed hole 20 penetrates the second ground surface 26 between the third medium plate 9 and the seventh medium plate 23 and the eighth medium plate 29. The third feed line 17 and the fourth feed line 18 are arranged on the second ground surface 26 between the seventh medium plate 23 and the eighth medium plate 29. The circular polarization generator 24 is arranged on the third ground surface 27 at the lower surface of the ninth medium plate 30.

[0090] Please refer to Figure 11- Figure 12 , which are respectively the return loss performance curves of the Ka and K band forms realized by the phased array 100 of the embodiment. Figure 11 It can be seen that in the entire Ka band range, the return loss (S11) is maintained below -10 dB, among which the best match (S11 value is about -30 dB) is achieved near 27.75 GHz, and it is also maintained below -10 dB near 29 GHz. Figure 12 It can be seen that in the K band (17.7~21.2GHz), the return loss (S11) also continuously maintains below -10 dB, especially achieving a good match below -30 dB near 19.5 GHz.

[0091] Embodiment Three

[0092] Based on the same inventive concept, the embodiment further provides an array device, which adopts the phased array 100 disclosed in the embodiment one, can also adopt the phased array 100 in the embodiment two, or simultaneously adopts the phased array 100 disclosed in the embodiment one and the phased array 100 in the embodiment two.

[0093] Specifically, please refer to Figure 13 In the column direction, the M rows of antenna units are obtained by translational or rotational copying with equal intervals Dx, and in the row direction, the N columns of antenna units are obtained by translational or rotational copying with equal intervals Dy, so as to finally form an antenna array with M×N units. Wherein, M and N are both positive integers.

[0094] In addition, the technical effects that can be achieved by the array device disclosed in the embodiment are the same as the technical effects that can be achieved by the phased array 100 disclosed in the embodiment one or / and the embodiment two, and thus will not be described herein again.

[0095] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, then the present application also intends to include these modifications and variations.

Claims

1. A phased array, characterized by, Comprise: a fourth dielectric plate, a third dielectric plate, a first ground surface, a second dielectric plate, a first dielectric plate and a feed structure are sequentially stacked along a first direction; a parasitic patch is arranged on a first surface of the first dielectric plate, wherein the first surface is a surface away from the second dielectric plate; an excitation patch is arranged on a second surface of the second dielectric plate, wherein the second surface is a surface away from the third dielectric plate, the parasitic patch and the excitation patch overlap in the first direction; a suppression gap for suppressing cavity resonance is arranged on the first ground surface; the suppression gap comprises a first suppression gap and a second suppression gap; the first suppression gap extends along a second direction, and the second suppression gap extends along a third direction, the second direction is the length direction of the second dielectric plate, and the third direction is the width direction of the second dielectric plate; wherein the first suppression gap is used to disturb the electromagnetic wave propagating along the length direction, and the second suppression gap is used to disturb the electromagnetic wave propagating along the width direction; a coupling gap is also arranged on the first ground surface; the feed structure is arranged on a third surface of the fourth dielectric plate for generating polarized signals, wherein the third surface is a surface close to the third dielectric plate.

2. The phased array of claim 1, wherein, Further comprising a rectangular strip-shaped grounding frame, which is arranged around the first dielectric plate and is grounded through a via hole.

3. The phased array antenna of claim 2, wherein: the coupling gap comprises a first coupling gap and a second coupling gap; and the feed structure comprises a first feed line and a second feed line; radio frequency signals are fed into the feed ports of the first feed line and the second feed line respectively, and then coupled through the first coupling gap and the second coupling gap respectively to obtain first coupling signals and second coupling signals; the first coupling signals and the second coupling signals are used to excite the excitation patch and the parasitic patch in turn.

4. The phased array of claim 3, wherein, The shapes of the first feed line and the second feed line include L shapes.

5. The phased array antenna of claim 4, wherein: the projections of the first coupling gap and the second coupling gap along the first direction are symmetrically arranged about the central axis of the parasitic patch and the excitation patch; the projections of the first feed line and the second feed line along the first direction are symmetrically arranged about the central axis of the parasitic patch and the excitation patch; the first coupling gap and the first feed line intersect along the first direction to obtain a first projection, and the second coupling gap and the second feed line intersect along the first direction to obtain a second projection; the first projection and the second projection are mirror symmetric.

6. The phased array of claim 5, wherein, Further comprising a third feed line, a fourth feed line, a first feed hole and a second feed hole; the signal feeding end of the third feed line is connected to the signal feeding end of the first feed line through the first feed hole; and the signal feeding end of the fourth feed line is connected to the signal feeding end of the second feed line through the second feed hole.

7. The phased array of claim 6, wherein, Further comprising a circular polarization generator; The circular polarization generator is configured to split a radio frequency signal into a first differential signal and a second differential signal having a first phase difference, or into a third differential signal and a fourth differential signal having a second phase difference; the third feed line is configured to receive the first differential signal or the third differential signal, and the fourth feed line is configured to receive the second differential signal or the fourth differential signal.

8. The phased array of claim 7, wherein, Also included is a ground wrap that surrounds the first feed line, the second feed line, the third feed line, the fourth feed line, and the circular polarization generator.

9. An array device, characterized by The application further includes a plurality of the phased arrays of any of claims 1-8, wherein the phased arrays are arranged in an array.

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