A phased array antenna structure

Abstract

The application discloses a phased array antenna structure, which comprises oppositely arranged first and second dielectric substrates, wherein the surface of the first dielectric substrate facing the second dielectric substrate is provided with a first metal patch layer, the surface of the second dielectric substrate facing the first dielectric substrate is provided with a second metal patch layer, and a gap exists between the first metal patch layer and the second metal patch layer; the first metal patch layer comprises at least two first metal patches, the second metal patch layer comprises at least two second metal patches, and the at least two first metal patches and the at least two second metal patches are in one-to-one correspondence; the phased array antenna structure further comprises an isolation plate, which is located between adjacent two first metal patches and between adjacent two second metal patches, so that the isolation degree of the phased array antenna structure can be improved, and the performance of signal transmission in the phased array antenna structure can be improved.

Description

Technical Field

[0001] This invention belongs to the field of antenna technology, specifically relating to a phased array antenna structure. Background Technology

[0002] A phased array antenna is an antenna system that electronically controls the feed phase of each radiating element in the antenna array to change the antenna pattern shape and beam scanning direction. Antenna isolation refers to the ratio of the signal power transmitted by one antenna to the signal power received by another antenna. This ratio reflects the degree of signal interference between the two antennas; the greater the isolation, the lower the degree of signal interference between the two antennas.

[0003] Typically, a phased array antenna consists of multiple antenna sub-elements, each composed of a feed structure and a metal patch. In this structure, the feed structure powers the metal patch, which, upon receiving the current, radiates electromagnetic waves into space, thus transmitting electromagnetic signals. Simultaneously, the metal patch receives electromagnetic waves from the external space and converts them into electrical signals. By processing these electrical signals, the signal content of the electromagnetic waves in the external space can be obtained, thus receiving electromagnetic signals. The use of multiple antenna sub-elements for transmitting and receiving signals increases the signal strength of the phased array antenna, thereby improving its performance. However, mutual coupling exists between two antenna sub-elements, causing interference from one sub-element's signal transmission and reception. This results in poor isolation between the two sub-elements, affecting the signal transmission performance of the phased array antenna. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a phased array antenna structure. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] In a first aspect, the present invention provides a phased array antenna structure, including a first dielectric substrate and a second dielectric substrate disposed opposite to each other. A first metal patch layer is provided on the surface of the first dielectric substrate facing the second dielectric substrate, and a second metal patch layer is provided on the surface of the second dielectric substrate facing the first dielectric substrate. A gap exists between the first metal patch layer and the second metal patch layer. The first metal patch layer includes at least two first metal patches, and the second metal patch layer includes at least two second metal patches. The at least two first metal patches and the at least two second metal patches correspond one-to-one. The phased array antenna structure further includes an isolation plate, which is located between two adjacent first metal patches and between two adjacent second metal patches.

[0006] In one embodiment of the present invention, a plurality of first metal patches are provided, and the plurality of first metal patches are arranged in an array. There is a first gap between two adjacent first metal patches along a first direction and a second gap between two adjacent first metal patches along a second direction. A plurality of second metal patches are provided, and the plurality of second metal patches are arranged in an array. There is a third gap between two adjacent second metal patches along the first direction and a fourth gap between two adjacent second metal patches along the second direction. The first direction and the second direction are perpendicular to each other.

[0007] In one embodiment of the present invention, the isolation plate includes a first plate and a second plate, the first plate and the second plate are fixedly connected, the first plate is located in both a first gap and a third gap, and the second plate is located in both a second gap and a fourth gap.

[0008] In one embodiment of the present invention, the first plate and / or the second plate are serrated structures, the serrated structure including a plurality of staggered first teeth and second teeth, the groove opening direction of the first teeth being opposite to the groove opening direction of the second teeth.

[0009] In one embodiment of the present invention, both the first dielectric substrate and the second dielectric substrate are strip plates arranged along a second direction; multiple first plates and multiple second plates are provided, and the multiple first plates and multiple second plates are staggered and connected in sequence; the first plate has a sawtooth structure, and the second plate includes a front plate portion, a middle plate portion and a rear plate portion that are parallel to each other; the first end of the front plate portion is connected to the previous first plate, the second end of the front plate portion is connected to the first end of the middle plate portion, the second end of the middle plate portion is connected to the first end of the rear plate portion, and the second end of the rear plate portion is connected to the next first plate; the front plate portion, the middle plate portion and the rear plate portion are all flat plate structures.

[0010] In one embodiment of the present invention, a first positioning groove and a second positioning groove are provided on the second dielectric substrate. The shape of the first positioning groove matches the shape of the first plate so that the first plate is engaged in the first positioning groove. The shape of the second positioning groove matches the shape of the second plate so that the second plate is engaged in the second positioning groove.

[0011] In one embodiment of the present invention, the bottom of the first plate is engaged in the first positioning groove, and the top of the first plate abuts against the surface of the first dielectric substrate facing the second dielectric substrate; the bottom of the second plate is engaged in the second positioning groove, and the top of the second plate abuts against the surface of the first dielectric substrate facing the second dielectric substrate.

[0012] In one embodiment of the present invention, a connecting layer is further included, which is located between the first dielectric substrate and the second dielectric substrate, and the connecting layer is provided with perforations for inserting the isolation plate.

[0013] In one embodiment of the present invention, the first dielectric substrate and the second dielectric substrate are made of flame-retardant materials. The thickness of the first dielectric substrate is 0.25mm-0.30mm, the thickness of the second dielectric substrate is 1.5mm-1.6mm, the spacing between the first dielectric substrate and the second dielectric substrate is 4.5mm-5.5mm, and the materials of the first metal patch layer, the second metal patch layer and the separator are all copper.

[0014] In one embodiment of the present invention, a metal grounding layer and at least two coaxial feed lines are further included. The metal grounding layer is disposed on the surface of the second dielectric substrate away from the first dielectric substrate. The metal grounding layer is provided with at least two through holes, and the at least two through holes correspond one-to-one with at least two second metal patches. The at least two coaxial feed lines extend through the at least two through holes and are connected to the second metal patches.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the above-described scheme of this application, firstly, the phased array antenna structure includes a first dielectric substrate and a second dielectric substrate disposed opposite to each other. A first metal patch layer is disposed on the surface of the first dielectric substrate facing the second dielectric substrate, and a second metal patch layer is disposed on the surface of the second dielectric substrate facing the first dielectric substrate. A gap exists between the first metal patch layer and the second metal patch layer. Thus, the second metal patch layer can act as a radiating patch to generate electromagnetic waves, and the first metal patch layer can act as a parasitic patch to improve the radiation performance of the second metal patch through coupling with it. The first metal patch layer includes at least two first metal patches, and the second metal patch layer includes at least two second metal patches, with each pair corresponding to one other. Thus, one first metal patch and one second metal patch can form an antenna sub-unit. Signal transmission is performed through at least two antenna sub-units composed of at least two first metal patches and at least two second metal patches, which can improve the signal transmission and reception strength in the phased array antenna structure, thereby improving the performance of the phased array antenna structure.

[0017] Secondly, the phased array antenna structure also includes an isolation plate located between two adjacent first metal patches and between two adjacent second metal patches. In this way, the isolation plate can impede signal transmission between the first metal patch in one antenna sub-unit and the first or second metal patch in another antenna sub-unit, increasing the attenuation loss of electromagnetic waves propagating between adjacent antenna sub-units in space. This avoids or reduces mutual coupling between the two antenna sub-units, reduces interference, improves isolation, and ultimately enhances the signal transmission performance of the phased array antenna structure.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is an exploded view of a phased array antenna structure provided in an embodiment of the present invention;

[0020] Figure 2 This is a front view of a phased array antenna structure provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the first dielectric substrate in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the first dielectric substrate and the first metal patch layer in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the second dielectric substrate and the second metal patch layer in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the metal grounding layer in an embodiment of the present invention. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the first dielectric substrate and the isolation plate in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the first plate of the isolation plate in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the metal grounding layer in an embodiment of the present invention. Figure 2 ;

[0028] Figure 10 This is a front view of the first dielectric substrate, the isolation plate, and the second dielectric substrate in an embodiment of the present invention;

[0029] Figure 11 This is a side view of the first dielectric substrate, the isolation plate, and the second dielectric substrate in an embodiment of the present invention;

[0030] Figure 12 This is a comparative schematic diagram of the simulation of passive voltage standing wave ratio performance in the embodiments of the present invention;

[0031] Figure 13 This is a comparative schematic diagram of the simulation of active voltage standing wave ratio performance in an embodiment of the present invention.

[0032] Reference numerals: 1-First dielectric substrate, 2-Second dielectric substrate, 3-First metal patch layer, 31-First metal patch, 32-First gap, 33-Second gap, 4-Second metal patch layer, 41-Second metal patch, 42-Third gap, 44-Fourth gap, 45-First positioning groove, 46-Second positioning groove, 5-Isolation plate, 51-First plate, 52-Second plate, 6-Connection layer, 7-Metallic grounding layer, 71-Through hole. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0034] Please see Figure 1 , Figure 2 , Figure 10 and Figure 11 This invention provides a phased array antenna structure, including a first dielectric substrate 1 and a second dielectric substrate 2 disposed opposite to each other. A first metal patch layer 3 is provided on the surface of the first dielectric substrate 1 facing the second dielectric substrate 2, and a second metal patch layer 4 is provided on the surface of the second dielectric substrate 2 facing the first dielectric substrate 1. There is a gap between the first metal patch layer 3 and the second metal patch layer 4. The first metal patch layer 3 includes at least two first metal patches 31, and the second metal patch layer 4 includes at least two second metal patches 41. The at least two first metal patches 31 and the at least two second metal patches 41 correspond one-to-one. The phased array antenna structure also includes an isolation plate 5, which is located between two adjacent first metal patches 31 and between two adjacent second metal patches 41.

[0035] In some embodiments of this application, the phased array antenna structure described above is applied to the C-band, which refers to the electromagnetic wave band with a frequency range of 4 GHz to 8 GHz. The C-band has important applications in wireless communication, radar, and satellite communication. Because the wavelength of the C-band is relatively short, the interaction between antenna sub-units in a phased array antenna structure applied to the C-band is more significant, the mutual coupling is stronger, and the interference between antenna sub-units is greater, making it easier to affect the performance of the phased array antenna structure. Therefore, when using the phased array antenna structure described above in this application, the isolation between antenna sub-units is improved by the isolation plate 5, reducing the mutual coupling between antenna sub-units, thus enabling the phased array antenna structure to have good communication performance when applied to the C-band.

[0036] In some embodiments of this application, such as Figure 3 and Figure 4As shown, the first dielectric substrate 1 is a rectangular plate with a length of 102 mm and a width of 30 mm. The second dielectric substrate 2 is a rectangular plate with a length of 74 mm and a width of 30 mm. The phased array antenna structure has a length of 102 mm, a width of 30 mm, and a height of 6.824 mm.

[0037] In some embodiments of this application, the first dielectric substrate 1 and the second dielectric substrate 2 are made of flame-retardant materials, which can improve the safety of the phased array antenna structure. The relative permittivity of the first dielectric substrate 1 and the second dielectric substrate 2 is 3.66, and the electrical cutting loss is 0.0037. The thickness of the first dielectric substrate 1 is 0.25mm-0.30mm, preferably 0.254mm. The thickness of the second dielectric substrate 2 is 1.5mm-1.6mm, preferably 1.57mm. The spacing between the first dielectric substrate 1 and the second dielectric substrate 2 is 4.5mm-5.5mm, preferably 5mm. Thus, the phased array antenna structure can be applied to miniaturized antenna structures. The first metal patch layer 3, the second metal patch layer 4, and the isolation plate 5 are all made of copper. Copper has advantages such as good conductivity, high ductility, ease of manufacturing, and strong isolation, thus facilitating the production and processing of the isolation plate 5 and improving its isolation performance.

[0038] In some embodiments of this application, an air cavity exists between the first dielectric substrate 1 and the second dielectric substrate 2.

[0039] In some embodiments of this application, a first metal patch 31 and a corresponding second metal patch 41 can form an antenna sub-unit, and at least two first metal patches 31 and at least two corresponding second metal patches 41 can respectively form at least two antenna sub-units.

[0040] In the above-described scheme of this application, firstly, the phased array antenna structure includes a first dielectric substrate 1 and a second dielectric substrate 2 disposed opposite to each other. A first metal patch layer 3 is provided on the surface of the first dielectric substrate 1 facing the second dielectric substrate 2, and a second metal patch layer 4 is provided on the surface of the second dielectric substrate 2 facing the first dielectric substrate 1. A gap exists between the first metal patch layer 3 and the second metal patch layer 4. Thus, the second metal patch layer 4 can serve as a radiating patch to generate electromagnetic waves, and the first metal patch layer 3 can serve as a parasitic patch to improve the radiation performance of the second metal patch 41 by coupling with it. The first metal patch layer 3 includes at least two first metal patches 31, and the second metal patch layer 4 includes at least two second metal patches 41, with a one-to-one correspondence between the at least two first metal patches 31 and the at least two second metal patches 41. Thus, a first metal patch 31 and a second metal patch 41 can form an antenna sub-unit. Signal transmission can be carried out through at least two antenna sub-units composed of at least two first metal patches 31 and at least two second metal patches 41, which can improve the signal transmission and reception strength in the phased array antenna structure, thereby improving the performance of the phased array antenna structure.

[0041] Secondly, the phased array antenna structure also includes an isolation plate 5, which is located between two adjacent first metal patches 31 and between two adjacent second metal patches 41. Thus, the isolation plate 5 can obstruct signal transmission between the first metal patch 31 in one antenna sub-unit and the first metal patch 31 or second metal patch 41 in another antenna sub-unit. This increases the path length of electromagnetic wave diffraction, increases the attenuation loss of electromagnetic waves propagating between adjacent antenna sub-units in space, thereby preventing or reducing mutual coupling between the two antenna sub-units, reducing interference between them, improving isolation, and ultimately improving the signal transmission performance of the phased array antenna structure.

[0042] Table 1 below shows the test parameters for radiation performance testing at 6 GHz for phased array antenna structures without and with the isolation plate 5.

[0043] Table 1:

[0044]

[0045] As shown in Table 1 above, when the azimuth or elevation angles are (0, 0), (0, -35), and (-55, 0), the gain and 3dB beamwidth of the phased array antenna structure without and with the isolation plate are not significantly different. Therefore, adding an isolation plate will not affect the normal gain and radiation of the phased array antenna structure.

[0046] In some embodiments of this application, such as Figure 4 and Figure 5 As shown, multiple first metal patches 31 are provided and arranged in an array. A first gap 32 exists between adjacent first metal patches 31 along a first direction, and a second gap 33 exists between adjacent first metal patches 31 along a second direction. Multiple second metal patches 41 are provided and arranged in an array. A third gap 42 exists between adjacent second metal patches 41 along the first direction, and a fourth gap 44 exists between adjacent second metal patches 41 along the second direction. The first and second directions are perpendicular to each other. Thus, signal transmission can be performed through the array of multiple first metal patches 31, improving the signal transmission and reception strength in the phased array antenna structure, thereby enhancing the performance of the phased array antenna structure.

[0047] In some embodiments of this application, such as Figure 1 , Figure 4 and Figure 5 As shown, the first direction is direction x, and the second direction is direction y.

[0048] In some embodiments of this application, such as Figure 7 and Figure 8As shown, the isolation plate 5 includes a first plate 51 and a second plate 52, which are fixedly connected. The first plate 51 is located simultaneously within the first gap 32 and the third gap 42, and the second plate 52 is located simultaneously within the second gap 33 and the fourth gap 44. Thus, when the first plate 51 is located simultaneously within the first gap 32 and the third gap 42, it can both hinder signal transmission between two adjacent first metal patches 31 in the first direction, preventing mutual coupling or weakening the mutual coupling effect between the two first metal patches 31, thereby improving the isolation between the two first metal patches 31 and thus improving the signal transmission performance in the phased array antenna structure; and also hinder signal transmission between the first metal patch 31 of one antenna sub-unit and the second metal patch 41 of the other antenna sub-unit in the first direction, preventing mutual coupling or weakening the mutual coupling effect between them, thereby preventing signal interference between the two antenna sub-units and affecting the performance of the phased array antenna structure. When the second plate 52 is located simultaneously within the second gap 33 and the fourth gap 44, the second plate 52 can both block the signal transmission between two adjacent first metal patches 31 in the second direction, avoid mutual coupling between the two first metal patches 31 or weaken the mutual coupling effect between the two first metal patches 31, improve the isolation between the two first metal patches 31, and thus improve the signal transmission performance in the phased array antenna structure; and also block the signal transmission between the first metal patch 31 of one antenna sub-unit and the second metal patch 41 of the other antenna sub-unit in two adjacent antenna sub-units in the second direction, avoid mutual coupling between the two or weaken the mutual coupling effect between the two, thereby avoiding signal interference between the two antenna sub-units and affecting the performance of the phased array antenna structure.

[0049] In some embodiments of this application, the first plate 51 and / or the second plate 52 are sawtooth structures, comprising multiple staggered first teeth and second teeth, with the opening directions of the grooves of the first teeth and the second teeth being opposite. Thus, when the first plate 51 and / or the second plate 52 are sawtooth structures, the sawtooth structure has grooves. When electromagnetic waves are transmitted into the grooves, they will collide with each groove wall and be reflected in multiple directions. The transmitted electromagnetic waves will collide with each other and cancel each other out, thereby increasing the attenuation loss of electromagnetic waves propagating between adjacent antenna sub-units in space. This avoids mutual coupling between the two antenna sub-units or weakens the mutual coupling between them, reducing interference between the two antenna sub-units, improving the isolation between them, and thus improving the overall radiation efficiency of the phased array antenna structure. Furthermore, the sawtooth structure can also increase the strength of the isolation plate 5, making the overall stability of the phased array antenna structure higher. The first and second teeth are staggered. When the opening direction of the slot of the first tooth is opposite to that of the slot of the second tooth, the electromagnetic waves emitted by two adjacent antenna sub-units can be suppressed and attenuated by the first and second teeth respectively, thereby further reducing the interference between the two antenna sub-units and improving the isolation between the two antenna sub-units.

[0050] In some embodiments of this application, both the first tooth and the second tooth are rectangular teeth.

[0051] In some embodiments of this application, both the first dielectric substrate 1 and the second dielectric substrate 2 are strip plates arranged along a second direction; multiple first plates 51 and multiple second plates 52 are provided, and the multiple first plates 51 and multiple second plates 52 are staggered and connected in sequence; the first plate 51 has a sawtooth structure, and the second plate 52 includes a front plate portion, a middle plate portion and a rear plate portion that are parallel to each other. The first end of the front plate portion is connected to the previous first plate 51, the second end of the front plate portion is connected to the first end of the middle plate portion, the second end of the middle plate portion is connected to the first end of the rear plate portion, and the second end of the rear plate portion is connected to the next first plate 51; the front plate portion, the middle plate portion and the rear plate portion are all flat plate structures. Thus, when both the first dielectric substrate 1 and the second dielectric substrate 2 are strip plates arranged along the second direction, the distribution space of the first metal patch 31 and the second metal patch 41 is large along the length direction of the strip plate, and the distribution space of the first metal patch 31 and the second metal patch 41 is small along the width direction of the strip plate. Therefore, the width of the second gap 33 can be greater than the width of the first gap 32, and the width of the fourth gap 44 can be greater than the width of the third gap 42, resulting in weaker interference between two adjacent first metal patches 31 along the second direction and stronger interference between two adjacent first metal patches 31 along the first direction. When the first plate 51 has a sawtooth structure and the second plate 52 includes a front plate, a middle plate, and a rear plate that are parallel to each other, the sawtooth structure effectively blocks electromagnetic waves and can reduce the interference between two adjacent first metal patches 31 along the first direction. When the front plate, middle plate, and rear plate are all flat plate structures, they can not only block the propagation of electromagnetic waves and reduce the interference between two adjacent first metal patches 31 along the second direction, but also make the production and processing of the second plate 52 more convenient.

[0052] In some embodiments of this application, the first metal patch 31 is arranged in an array of two rows and six columns, and the second metal patch 41 is also arranged in an array of two rows and six columns.

[0053] In some embodiments of this application, such as Figure 5 As shown, the second dielectric substrate 2 is provided with a first positioning groove 45 and a second positioning groove 46. The shape of the first positioning groove 45 matches the shape of the first plate 51 so that the first plate 51 is engaged in the first positioning groove 45. The shape of the second positioning groove 46 matches the shape of the second plate 52 so that the second plate 52 is engaged in the second positioning groove 46. In this way, by positioning the first plate 51 and the second plate 52 of the isolation plate 5 through the first positioning groove 45 and the second positioning groove 46, the installation accuracy and stability of the isolation plate 5 can be improved.

[0054] In some embodiments of this application, such as Figure 7As shown, the bottom of the first plate 51 is engaged in the first positioning groove 45, and the top of the first plate 51 abuts against the surface of the first dielectric substrate 1 facing the second dielectric substrate 2; the bottom of the second plate 52 is engaged in the second positioning groove 46, and the top of the second plate 52 abuts against the surface of the first dielectric substrate 1 facing the second dielectric substrate 2. This avoids the situation where a gap exists between the top of the first plate 51 and the first dielectric substrate 1, which could form a propagation channel for electromagnetic waves and cause interference between the two antenna sub-units; and similarly, it avoids the situation where a gap exists between the top of the second plate 52 and the first dielectric substrate 1, which could form a propagation channel for electromagnetic waves and cause interference between the two antenna sub-units, thereby further improving the performance of the phased array antenna structure.

[0055] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the phased array antenna structure also includes a connecting layer 6, which is located between the first dielectric substrate 1 and the second dielectric substrate 2. The connecting layer 6 has through holes for inserting the isolation plate 5. In this way, the first dielectric substrate 1, the second dielectric substrate 2, and the isolation plate 5 are positioned by the connecting layer 6, which can improve the overall stability of the phased array antenna.

[0056] In some embodiments of this application, such as Figure 1 , Figure 6 and Figure 9 As shown, the phased array antenna structure also includes a metal ground layer 7 and at least two coaxial feed lines. The metal ground layer 7 is disposed on the surface of the second dielectric substrate 2 away from the first dielectric substrate 1. The metal ground layer 7 has at least two through holes 71, and each of the at least two through holes 71 corresponds to at least two second metal patches 41. The at least two coaxial feed lines extend through the at least two through holes 71 and are connected to the second metal patches 41. In this way, grounding can be achieved through the metal ground layer 7, and power can be supplied to the first metal patch 31 through the coaxial feed lines, ensuring that the phased array antenna structure can operate normally.

[0057] In some embodiments of this application, such as Figure 9 As shown, a groove for positioning the isolation plate 5 can also be provided on the metal grounding layer 7, and the shape of the groove is the same as the cross-sectional shape of the isolation plate 5. At this time, a through hole is provided on the second dielectric substrate 2, and the isolation plate 5 extends through the through hole on the second dielectric substrate 2 into the groove on the metal grounding layer 7.

[0058] In some embodiments of this application, the inner diameter of the coaxial feeder can be 0.5 mm, the outer diameter can be 2.8 mm, and the material of the coaxial feeder can be FR-4 flame-retardant material to meet the impedance matching of 50 ohms.

[0059] In some embodiments of this application, the metal grounding layer 7 may be made of copper.

[0060] Table 2 below shows the specific parameters of the phased array antenna structure in the embodiments of this application.

[0061] Table 2:

[0062] parameter <![CDATA[h1]]> <![CDATA[h2]]> <![CDATA[h3]]> <![CDATA[h4]]> <![CDATA[D1]]> <![CDATA[D2]]> <![CDATA[D3]]> <![CDATA[D4]]> <![CDATA[d1]]> <![CDATA[d2]]> value / mm 0.254 5 1.57 6.57 102 30 74 30 1.2 23.5 parameter <![CDATA[d3]]> <![CDATA[d4]]> <![CDATA[d5]]> <![CDATA[d6]]> <![CDATA[d7]]> <![CDATA[d8]]> <![CDATA[d9]]> <![CDATA[d x ]]> <![CDATA[d y ]]> <![CDATA[l1]]> value / mm 1.7 9.5 2.95 1.2 0.5 0.8 0.4 15 22 11 parameter <![CDATA[l2]]> <![CDATA[l3]]> <![CDATA[l4]]> <![CDATA[w1]]> <![CDATA[w2]]> <![CDATA[w3]]> <![CDATA[r2]]> value / mm 11 15 12.9 12.4 11.4 0.2 1.4

[0063] Where h1 is the thickness of the first dielectric substrate 1, h2 is the spacing between the first dielectric substrate 1 and the second dielectric substrate 2, h3 is the thickness of the second dielectric substrate 2, and h4 is the sum of h2 and h3. D1 is the length of the first dielectric substrate 1, and D2 is the width of the first dielectric substrate 1. Please refer to [link / reference]. Figure 4 d1 is the distance between the first metal patch 31 and the edge of the first dielectric substrate 1 in the first direction, d2 is the distance between the first metal patch 31 and the edge of the first dielectric substrate 1 in the second direction, l1 is the length of the first metal patch 31, and w1 is the width of the first metal patch 31. See also... Figure 5 d3 is the distance between the edges of the second metal patch 41 and the second dielectric substrate 2 in the first direction, d4 is the distance between the edges of the second metal patch 41 and the second dielectric substrate 2 in the second direction, l2 is the length of the first metal patch 31, and w2 is the width of the first metal patch 31. D3 is the length of the second dielectric substrate 2, and D4 is the width of the second dielectric substrate 2. Please refer to [link / reference]. Figure 6 r2 is the radius of the through hole 71 in the metal grounding layer 7, d x d is the pitch spacing of the first metal patch 31. y This refers to the azimuth spacing of the first metal patch 31. Please refer to [link / reference]. Figure 7 d5 is the opening width of the groove in the first plate 51 of the isolation plate 5; d6 is the distance between the front plate portion and the middle plate portion of the second plate 52; l3 is the distance between the connection point of the front plate portion of the second plate 52 and the first plate 51 and the edge of the first dielectric substrate 1 in the first direction; and l4 is the length of the front plate portion of the second plate 52. (See also...) Figure 8 d7 is the height of the left end of the first tooth in the first plate 51, d8 is the height of the right end of the first tooth in the first plate 51, d9 is the height of the rightmost end of the first plate 51, and w3 is the thickness of the first plate 51.

[0064] In some embodiments of this application, Figure 12A comparative schematic diagram of the simulated passive voltage standing wave ratio (VSWR) performance of a phased array antenna structure is shown. The six gray lines represent the passive VSWR of the six first metal patches 31 in the phased array antenna structure without the isolation plate 5, with an average value of 2.87. The six black lines represent the passive VSWR of the six first metal patches 31 in the phased array antenna structure with the isolation plate 5, with an average value of 1.58. The VSWR is the ratio of the voltage amplitude at the antinode to the voltage amplitude at the trough of a transmission line. The VSWR reflects the isolation of the antenna. The lower the VSWR, the better the antenna isolation. Figure 12 It can be seen that the average passive voltage standing wave ratio of the phased array antenna structure with isolation plate 5 is less than that of the phased array antenna structure without isolation plate 5. Therefore, the passive isolation of the phased array antenna structure with isolation plate 5 is significantly improved.

[0065] In some embodiments of this application, Figure 13 A comparative schematic diagram of the simulated active voltage standing wave ratio (VSWR) performance of a phased array antenna structure is shown. Specifically, the phased array antenna structure is applied at 6 GHz, with the phased array antenna port using an elevation angle of 0° and a normal angle of -35° for amplitude and phase. The six gray lines represent the active VSWR of the six first metal patches 31 in the phased array antenna structure without the isolation plate 5, with an average value of 4.36. The six black lines represent the active VSWR of the six first metal patches 31 in the phased array antenna structure with the isolation plate 5, with an average value of 1.80. Figure 13 It can be seen that the average active voltage standing wave ratio of the phased array antenna structure with isolation plate 5 is less than that of the phased array antenna structure without isolation plate 5. Therefore, the active isolation of the phased array antenna structure with isolation plate 5 is significantly improved.

[0066] Table 3 below shows the average voltage standing wave ratios of the phased array antenna structure without the isolation plate 5 and the phased array antenna structure with the isolation plate 5 in the passive, (0,0), (0,-35), and (-30,0) conditions.

[0067]

[0068] As shown in Table 3 above, in the passive, (0, 0), (0, -35), and (-30, 0) conditions, the average voltage standing wave ratio (VSWR) of the phased array antenna structure without the isolation plate 5 is greater than the average VSWR of the phased array antenna structure with the isolation plate 5. Therefore, the isolation of the phased array antenna structure with the isolation plate 5 is significantly improved. Thus, when the phased array antenna structure in this embodiment is used, the isolation of the phased array antenna structure can be improved without affecting the antenna radiation performance.

[0069] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A phased array antenna structure, characterized by, The phase array antenna structure comprises oppositely arranged first and second dielectric substrates, the first dielectric substrate is provided with a first metal patch layer on a surface thereof facing the second dielectric substrate, the second dielectric substrate is provided with a second metal patch layer on a surface thereof facing the first dielectric substrate, and a gap exists between the first and second metal patch layers; The first metal patch layer comprises at least two first metal patches, the second metal patch layer comprises at least two second metal patches, and the at least two first metal patches and the at least two second metal patches correspond to each other in one-to-one manner; The phase array antenna structure further comprises an isolation plate, the isolation plate is located between adjacent two first metal patches and between adjacent two second metal patches; The first metal patch is provided in plurality, and the plurality of first metal patches are arranged in an array, a first gap exists between adjacent two first metal patches in a first direction, and a second gap exists between adjacent two first metal patches in a second direction; The second metal patch is provided in plurality, and the plurality of second metal patches are arranged in an array, a third gap exists between adjacent two second metal patches in the first direction, and a fourth gap exists between adjacent two second metal patches in the second direction; The first direction and the second direction are perpendicular to each other.

2. The phased array antenna structure of claim 1, wherein, The isolation plate comprises a first plate and a second plate, the first plate and the second plate are fixedly connected, the first plate is located in the first gap and the third gap at the same time, and the second plate is located in the second gap and the fourth gap at the same time.

3. The phased array antenna structure of claim 2, wherein, The first plate and / or the second plate are in a sawtooth structure, the sawtooth structure comprises a plurality of first teeth and second teeth arranged in an interlaced manner, and tooth groove opening directions of the first teeth and the second teeth are opposite.

4. The phased array antenna structure of claim 3, wherein, The first dielectric substrate and the second dielectric substrate are both strip-shaped plates arranged in the second direction; The first plate and the second plate are both provided in plurality, and the plurality of first plates and the plurality of second plates are arranged in an interlaced manner and connected in sequence; The first plate is in a sawtooth structure, the second plate comprises a front plate portion, a middle plate portion and a rear plate portion parallel to each other, a first end of the front plate portion is connected with a previous first plate, a second end of the front plate portion is connected with a first end of the middle plate portion, a second end of the middle plate portion is connected with a first end of the rear plate portion, and a second end of the rear plate portion is connected with a next first plate; The front plate portion, the middle plate portion and the rear plate portion are all in a flat plate structure.

5. The phased array antenna structure of claim 2, wherein, The second dielectric substrate is provided with a first positioning groove and a second positioning groove, a shape of the first positioning groove matches a shape of the first plate, so that the first plate is clamped in the first positioning groove, and a shape of the second positioning groove matches a shape of the second plate, so that the second plate is clamped in the second positioning groove.

6. The phased array antenna structure of claim 5, wherein, A bottom of the first plate is clamped in the first positioning groove, and a top of the first plate and a surface of the first dielectric substrate facing the second dielectric substrate are in abutment. The bottom of the second plate is clamped in the second positioning groove, and the top of the second plate and the first medium substrate abut the surface of the second medium substrate.

7. The phased array antenna structure of claim 1, wherein, The connecting layer is further included between the first medium substrate and the second medium substrate, and the connecting layer is provided with a perforation for inserting the isolation plate.

8. The phased array antenna structure of claim 1, wherein, The materials of the first medium substrate and the second medium substrate are flame-resistant materials, the thickness of the first medium substrate is 0.25-0.30 mm, the thickness of the second medium substrate is 1.5-1.6 mm, the spacing between the first medium substrate and the second medium substrate is 4.5-5.5 mm, and the materials of the first metal patch layer, the second metal patch layer and the isolation plate are all copper.

9. The phased array antenna structure of claim 1, wherein, The metal ground layer and at least two coaxial feed lines are further included, the metal ground layer is arranged on the surface of the second medium substrate away from the first medium substrate, the metal ground layer is provided with at least two through holes, at least two through holes and at least two second metal patches are one-to-one corresponding, and at least two coaxial feed lines respectively pass through at least two through holes and are connected with the second metal patches.

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