F-P resonant cavity antenna with dual-band shared aperture beam deflection

Abstract

The invention discloses an F-P resonant cavity antenna with dual-band shared aperture beam deflection. The antenna comprises a partial reflection metasurface arranged on the upper portion and a feed source antenna arranged on the lower portion. According to the partial reflection metasurface, a first layer of metal patch is composed of 64 metasurface units and is divided into three groups, and each group is composed of square metal patches which are different in parameter and are hollowed out in the middle in an I-shaped mode and used for controlling high-frequency transmission and reflection performance; 64 second-layer metal patches are laid on the upper surface of the second-layer dielectric substrate, the second-layer metal patches are divided into two groups, and each group is composed of square rings with different parameters; the third layer of metal patch is composed of 64 rectangular metal sheets which are crossed in a cross mode, and the third layer of metal patch is divided into three groups and used for controlling low-frequency transmission and reflection performance; the feed source antenna is composed of a rectangular metal patch, a metal through hole is formed in the rectangular metal patch, and meanwhile the rectangular metal patch is hollowed out by an N-type metal patch and a rectangular metal patch. And the fifth layer of metal patch is flatly laid on the lower surface of the third layer of dielectric substrate and is etched with a circular gap for transmitting energy. The invention has the advantages of simple structure, dual-band operation, beam deflection, aperture sharing and small volume.

Description

Technical Field

[0001] The present invention relates to the technical field of dual-band antenna engineering, and in particular to a dual-band shared aperture beam deflection FP resonant cavity antenna. Background Art

[0002] Compared with traditional microstrip arrays, Fabry-Pero (FP) resonator antennas have the characteristics of high gain, simple feeding mechanism and low manufacturing cost, and have attracted widespread attention in the antenna community. FP resonant cavity antennas have potential applications in current and next-generation wireless communication systems, sensor systems, radars and satellite communications.

[0003] In the wireless communication environment, since antenna systems are installed on different buildings and wireless communication towers at different heights, in order to ensure the quality of signal transmission, the antenna beam pointing must be able to be deflected to the appropriate position. Not only does the signal transmission between antenna systems require beam deflection, but the connection between the antenna system and the terminal antennas commonly used in people's daily lives also requires the antenna beam to be able to be deflected or scanned. At the same time, with the development of wireless communication technology, multi-band wireless communications are becoming more and more common.

[0004] In summary, in future wireless communication systems, there is an urgent need to carry out research on a new dual-band shared aperture beam deflection FP cavity antenna to address the problems of interference between dual-band antenna communication, inappropriate directional deflection angle, complex structure, and difficulty in implementation. Summary of the invention

[0005] The purpose of the present invention is to provide a novel dual-band shared aperture beam deflection FP resonant cavity antenna with a simple structure and easy implementation, and to meet the requirements of non-interference of dual-band antenna communication and appropriate directional deflection angle.

[0006] The technical solution to achieve the purpose of the present invention is: a dual-band shared aperture beam deflection FP resonant cavity antenna, including a partially reflective metasurface and a feed antenna arranged thereunder; the partially reflective metasurface includes a first layer of metal patches, a first layer of dielectric substrate, a second layer of metal patches, a second layer of dielectric substrate, and a third layer of metal patches arranged sequentially from top to bottom, and the feed antenna includes a fourth layer of metal patches, a third layer of dielectric substrate, and a fifth layer of metal patches arranged sequentially from top to bottom, wherein:

[0007] The first layer of metal patches is composed of an 8×8 metal patch array, and the main body of each metal patch is a square structure with an I-shaped hollowing out. A total of 64 metal patches are divided into 3 groups according to columns. From left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group. The parameters of each group are different, which are used to adjust the high-frequency transmission and reflection performance of the metasurface.

[0008] The second layer of metal patches is laid flat on the upper surface of the second dielectric substrate, and is composed of 8×8 square ring metal patches, which are divided into 2 groups. From left to right, the first to third columns are the first group, and the fourth to eighth columns are the second group. The parameters of each group are different.

[0009] The third layer of metal patches is laid flat on the lower surface of the second dielectric substrate, and is composed of 8×8 cross-intersecting rectangular metal patches, which are divided into 3 groups. From left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group, which are used to control low-frequency transmission and reflection performance;

[0010] The fourth layer of metal patch includes a first rectangular metal sheet, a second rectangle is hollowed out at the top of the first rectangular metal sheet, an N-shaped sheet is hollowed out below the second rectangle, the N-shaped sheet is formed by three rectangles connected in sequence to form a rectangular frame with an open bottom, a first metal through hole is etched in the rectangular frame, the first metal through hole penetrates the third layer of dielectric substrate, and is connected to the fourth layer of metal patch;

[0011] The fifth metal patch is laid flat on the lower surface of the entire third dielectric substrate and a first circular gap is etched. The radius of the first circular gap is greater than the radius of the first metal through hole, and the centers of the two circles are at the same position, which is used to improve the isolation during coaxial feeding.

[0012] Furthermore, the 8×8 metal sheets of the first layer of metal patches are, from left to right and from top to bottom, the first metal sheet to the sixty-fourth metal sheet;

[0013] The first to third metal sheets, the ninth to eleventh metal sheets, the seventeenth to nineteenth metal sheets, the twenty-fifth to twenty-seventh metal sheets, the thirty-third to thirty-fifth metal sheets, the forty-first to forty-third metal sheets, the forty-ninth to fifty-first metal sheets, and the fifty-seventh to fifty-ninth metal sheets have the same structure and are the first group;

[0014] The fourth to fifth metal sheets, the twelfth to thirteenth metal sheets, the twentieth to twenty-first metal sheets, the twenty-eighth to twenty-ninth metal sheets, the thirty-sixth to thirty-seventh metal sheets, the forty-fourth to forty-fifth metal sheets, the fifty-second to fifty-third metal sheets, and the sixtieth to sixty-first metal sheets have the same structure and belong to the second group;

[0015] The seventh to eighth metal sheets, the fourteenth to sixteenth metal sheets, the twenty-second to twenty-fourth metal sheets, the thirtieth to thirty-second metal sheets, the thirty-eighth to fortieth metal sheets, the forty-sixth to forty-eighth metal sheets, the fifty-fourth to fifty-sixth metal sheets, and the sixty-second to sixty-fourth metal sheets have exactly the same structure and are the third group.

[0016] Furthermore, in the first group of the first layer of metal patches, the first metal sheet body is composed of a first square metal sheet and a hollowed-out first I-shaped figure; the side length of the first square metal sheet is L, and the hollowed-out first I-shaped figure is composed of a first arc connected to the upper and lower ends of a central straight line, the centers of the two first arcs are on the central straight line, and the first I-shaped figure is symmetrical about the center, and the inner ring radius of the first arc is r 1 , the outer ring radius is r 2 , angle is the;

[0017] In the second group of the first layer of metal patches, the fourth metal sheet body is composed of the second square metal sheet and the hollowed-out second I-shaped pattern; the side length of the second square metal sheet is L 1 The hollowed-out second I-shaped figure is composed of a middle straight line with a second arc at each end, the centers of the two second arcs are on the middle straight line, and the second I-shaped figure is symmetrical about the center, and the inner ring radius of the second arc is r 3 , the outer ring radius is r 4 , angle is bate;

[0018] In the third group of the first layer of metal patches, the sixth metal sheet body is composed of the third square metal sheet and the third hollow I-shaped pattern; the side length of the third square metal sheet is L 2 The hollowed-out third I-shaped figure is composed of a middle straight line with a third arc connected at both ends. The centers of the two third arcs are on the middle straight line, and the third I-shaped figure is symmetrical about the center. The inner ring radius of the third arc is r 5 , the outer ring radius is r 6 , angle is Alpha.

[0019] Furthermore, the 8×8 square ring metal sheets of the second layer of metal patches are the first square ring metal sheet to the sixty-fourth square ring metal sheet;

[0020] The first to third square ring metal pieces, the ninth to eleventh square ring metal pieces, the seventeenth to nineteenth square ring metal pieces, the twenty-fifth to twenty-seventh square ring metal pieces, the thirty-third to thirty-fifth square ring metal pieces, the forty-first to forty-third square ring metal pieces, the forty-ninth to fifty-first square ring metal pieces, and the fifty-seventh to fifty-ninth square ring metal pieces have the same structure, and are the first group;

[0021] The fourth square ring metal sheet to the eighth square ring metal sheet, the twelfth square ring metal sheet to the sixteenth square ring metal sheet, the twentieth square ring metal sheet to the twenty-fourth square ring metal sheet, the twenty-eighth square ring metal sheet to the thirty-second square ring metal sheet, the thirty-sixth square ring metal sheet to the fortieth square ring metal sheet, the forty-fourth square ring metal sheet to the forty-eighth square ring metal sheet, the fifty-second square ring metal sheet to the fifty-sixth square ring metal sheet, and the sixtieth square ring metal sheet to the sixty-fourth square ring metal sheet have exactly the same structure and belong to the second group.

[0022] Furthermore, in the first group of the second layer of metal patches, the main body of the first square ring metal patch is composed of a side length of W 1 The square with side length W is subtracted from the square with side length W;

[0023] In the second group of the second layer of metal patches, the main body of the fourth square ring metal patch is composed of a side length of W 2 The square minus the side length is W 3 of square composition.

[0024] Furthermore, the 8×8 cross-intersecting rectangular metal sheets of the third layer of metal patches are the first cross-intersecting rectangular metal sheet to the sixty-fourth cross-intersecting rectangular metal sheet;

[0025] The first to third cross-intersecting rectangular metal pieces, the ninth to eleventh cross-intersecting rectangular metal pieces, the seventeenth to nineteenth cross-intersecting rectangular metal pieces, the twenty-fifth to twenty-seventh cross-intersecting rectangular metal pieces, the thirty-third to thirty-fifth cross-intersecting rectangular metal pieces, the forty-first to forty-third cross-intersecting rectangular metal pieces, the forty-ninth to fifty-first cross-intersecting rectangular metal pieces, and the fifty-seventh to fifty-ninth cross-intersecting rectangular metal pieces have the same structure, and are the first group;

[0026] The fortieth to fifth cross-intersecting rectangular metal pieces, the twelfth to thirteenth cross-intersecting rectangular metal pieces, the twentieth to twenty-first cross-intersecting rectangular metal pieces, the twenty-eighth to twenty-ninth cross-intersecting rectangular metal pieces, the thirty-sixth to thirty-seventh cross-intersecting rectangular metal pieces, the forty-fourth to forty-fifth cross-intersecting rectangular metal pieces, the fifty-second to fifty-third cross-intersecting rectangular metal pieces, and the sixtieth to sixty-first cross-intersecting rectangular metal pieces have the same structure, and are the second group;

[0027] The rectangular metal piece with the seventh cross intersection to the eightieth cross intersection, the rectangular metal piece with the fourteenth cross intersection to the sixteenth cross intersection, the rectangular metal piece with the twenty-second cross intersection to the twenty-fourth cross intersection, the rectangular metal piece with the thirtieth cross intersection to the thirty-second cross intersection, the rectangular metal piece with the thirty-eighth cross intersection to the rectangular metal piece with the fortieth cross intersection, the rectangular metal piece with the forty-sixth cross intersection to the forty-eighth cross intersection, the rectangular metal piece with the fifty-fourth cross intersection to the fifty-sixth cross intersection, and the rectangular metal piece with the sixty-second cross intersection to the sixty-fourth cross intersection have exactly the same structure and are the third group.

[0028] Furthermore, in the first group of the third layer of metal patches, the main body of the first cross-intersecting rectangular metal patch is composed of two metal patches with a width of W. 4 , a rectangle with a length of P intersects crosswise;

[0029] In the second group of the third layer of metal patches, the main body of the fourth cross-intersecting rectangular metal patch is composed of two 5 , a rectangle with a length of P intersects crosswise;

[0030] In the third group of the third layer of metal patches, the main body of the sixth cross-intersecting rectangular metal patch is composed of two 6 , formed by the cross intersection of rectangles with a length of P.

[0031] Furthermore, the size of the first dielectric substrate is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the second dielectric substrate is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the third dielectric substrate is 64 mm×64 mm, and the thickness is 3.175 mm; the material of all dielectric substrates is Rogers RT5880;

[0032] In the fourth layer of metal patches, the first rectangular metal patch has a longitudinal length of 13.5 mm and a transverse length of 13.1 mm; the second rectangle extends transversely from left to right; the N-shaped metal patch has a third rectangle in the middle, a fourth rectangle on the left, and a fifth rectangle on the right, and the three rectangles have the same width;

[0033] The radius of the first metal through hole is 0.64 mm, and the radius of the first circular gap is 1.472 mm.

[0034] Furthermore, the height H between the partially reflective metasurface and the feed antenna satisfies the following formula:

[0035] H=H L =H H

[0036]

[0037] The subscripts L and U represent the low frequency band and the high frequency band, respectively. is the reflection phase of the upper partially reflective metasurface, λ is the free space wavelength at the operating frequency, and N represents an integer.

[0038] Furthermore, the deflection angle α of the FP resonant cavity antenna satisfies the following formula:

[0039]

[0040] in, is the reflection phase of the upper partially reflective metasurface, and N represents an integer.

[0041] Compared with the prior art, the present invention has the following significant advantages: (1) the two frequency bands of the partially reflective metasurface work independently, the structure is simple and easy to integrate; (2) the radiation deflection of the antenna is achieved by changing the phase difference of the metasurface; (3) the coaxial line is used to transmit energy, and the feeding antenna has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1a It is a side view of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention.

[0043] Figure 1b It is a top view of the first layer of metal patch of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0044] Figure 1c It is a top view of the second layer of metal patch of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0045] Figure 1d It is a top view of the third metal patch layer of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0046] Figure 1e It is a top view of the fourth metal patch of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0047] Figure 1f It is a top view of the third dielectric substrate of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0048] Figure 1g It is a top view of the fifth metal patch of the FP resonant cavity antenna with dual-band shared aperture beam deflection of the present invention.

[0049] Figure 2 is the S of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention. 11 Graph.

[0050] Figure 3 It is a gain curve diagram of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention.

[0051] Figure 4 It is the xoz plane radiation pattern of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention at 6 GHz and 10 GHz.

[0052] Figure 5 The yoz plane radiation pattern of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention at 6 GHz and 10 GHz. DETAILED DESCRIPTION

[0053] The dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention has the characteristics of dual-band and beam deflection, adopts the working principle of the Fabry-Perot resonant cavity to make the antenna structure simpler and easier to process, and adopts the coaxial line feeding method to make the antenna have better radiation characteristics.

[0054] Combination Figure 1a to Figure 1g The present invention discloses a dual-band shared aperture beam deflection FP resonant cavity antenna, comprising a feed antenna and a partially reflective metasurface, wherein the partially reflective metasurface is covered above the feed antenna, and is used to realize independent operation of two frequency bands of the antenna and realize beam deflection; the partially reflective metasurface comprises a first metal patch 1, a first dielectric substrate 2, a second metal patch 3, a second dielectric substrate 4, and a third metal patch 5 arranged in sequence from top to bottom, and the feed antenna comprises a fourth metal patch 6, a third dielectric substrate 7, and a fifth metal patch 8 arranged in sequence from top to bottom, wherein:

[0055] The first layer of metal patches 1 is composed of an 8×8 metal patch array, and the main body of each metal patch is a square structure with an I-shaped hollowing out; a total of 64 metal patches are divided into 3 groups according to columns, from left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group. The parameters of each group are different, which are used to adjust the high-frequency transmission and reflection performance of the metasurface;

[0056] The second layer of metal patches 3 is laid flat on the upper surface of the second layer of dielectric substrate 4, and is composed of 8×8 square ring metal patches, which are divided into 2 groups. From left to right, the first to third columns are the first group, and the fourth to eighth columns are the second group, and the parameters of each group are different;

[0057] The third layer of metal patches 5 is laid flat on the lower surface of the second layer of dielectric substrate 4, and is composed of 8×8 cross-intersecting rectangular metal patches, which are divided into 3 groups. From left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group, which are used to control low-frequency transmission and reflection performance;

[0058] The fourth-layer metal patch 6 includes a first rectangular metal sheet 61, a second rectangle 611 is hollowed out at the top of the first rectangular metal sheet 61, an N-type 612 is hollowed out below the second rectangle 611, the N-type 612 is formed by three rectangles connected in sequence to form a rectangular frame with an open bottom, a first metal through hole 613 is etched in the rectangular frame, and the first metal through hole 613 penetrates the third-layer dielectric substrate 7 and connects the fourth-layer metal patch 6;

[0059] The fifth metal patch 8 is laid flat on the lower surface of the entire third dielectric substrate 7, and a first circular gap 81 is etched. The radius of the first circular gap 81 is larger than the radius of the first metal through hole 613, and the center positions of the two circles are the same, which is used to improve the isolation during coaxial feeding.

[0060] As a specific example, the 8×8 metal sheets of the first layer of metal patch 1 are, from left to right and from top to bottom, the first metal sheet 11 to the sixty-fourth metal sheet 164;

[0061] The first to third metal sheets 11 to 13, the ninth to eleventh metal sheets 19 to 111, the seventeenth to nineteenth metal sheets 117 to 119, the twenty-fifth to twenty-seventh metal sheets 125 to 127, the thirty-third to thirty-fifth metal sheets 133 to 135, the forty-first to forty-third metal sheets 141 to 143, the forty-ninth to fifty-first metal sheets 149 to 151, and the fifty-seventh to fifty-ninth metal sheets 157 to 159 have the same structure and are the first group;

[0062] The fourth metal sheet 14 to the fifth metal sheet 15, the twelfth metal sheet 112 to the thirteenth metal sheet 113, the twentieth metal sheet 120 to the twenty-first metal sheet 121, the twenty-eighth metal sheet 128 to the twenty-ninth metal sheet 129, the thirty-sixth metal sheet 136 to the thirty-seventh metal sheet 137, the forty-fourth and forty-fifth metal sheets 144 to the forty-fifth metal sheet 145, the fifty-second metal sheet 152 to the fifty-third metal sheet 153, and the sixtieth metal sheet 160 to the sixty-first metal sheet 161 have the same structure and belong to the second group;

[0063] The seventh metal sheet 17 to the eighth metal sheet 18, the fourteenth metal sheet 114 to the sixteenth metal sheet 116, the twenty-second metal sheet 122 to the twenty-fourth metal sheet 124, the thirtieth metal sheet 130 to the thirty-second metal sheet 132, the thirty-eighth metal sheet 138 to the fortieth metal sheet 140, the forty-sixth metal sheet 146 to the forty-eighth metal sheet 148, the fifty-fourth metal sheet 154 to the fifty-sixth metal sheet 156, and the sixty-second metal sheet 162 to the sixty-fourth metal sheet 164 have exactly the same structure and belong to the third group.

[0064] As a specific example, in the first group of the first layer of metal patches 1, the main body of the first metal sheet 11 is composed of a first square metal sheet 101 and a hollow first I-shaped figure 1011; the side length of the first square metal sheet 101 is L, and the hollow first I-shaped figure 1011 is composed of a first arc connected to the upper and lower ends of a central straight line, the centers of the two first arcs are on the central straight line, and the first I-shaped figure 1011 is symmetrical about the center, and the inner ring radius of the first arc is r 1 , the outer ring radius is r 2 , angle is the;

[0065] In the second group of the first layer of metal patches 1, the fourth metal sheet 14 is mainly composed of the second square metal sheet 104 and the hollowed-out second I-shaped pattern 1041; the side length of the second square metal sheet 104 is L 1 The hollowed-out second I-shaped figure 1041 is composed of a middle straight line with a second arc connected at the upper and lower ends, the centers of the two second arcs are on the middle straight line, and the second I-shaped figure 1041 is symmetrical about the center, and the inner ring radius of the second arc is r 3 , the outer ring radius is r 4 , angle is bate;

[0066] In the third group of the first layer of metal patches 1, the sixth metal sheet 16 is mainly composed of the third square metal sheet 106 and the third hollow I-shaped pattern 1061; the side length of the third square metal sheet 106 is L 2The hollow third I-shaped figure 1061 is composed of a middle straight line with a third arc connected at the upper and lower ends, the centers of the two third arcs are on the middle straight line, and the third I-shaped figure 1061 is symmetrical about the center, and the inner ring radius of the third arc is r 5 , the outer ring radius is r 6 , angle is Alpha.

[0067] As a specific example, the 8×8 square ring metal sheets of the second layer of metal patch 3 are the first square ring metal sheet 31 to the sixty-fourth square ring metal sheet 364;

[0068] The first square ring metal sheet 31 to the third square ring metal sheet 33, the ninth square ring metal sheet 39 to the eleventh square ring metal sheet 311, the seventeenth square ring metal sheet 317 to the nineteenth square ring metal sheet 319, the twenty-fifth square ring metal sheet 325 to the twenty-seventh square ring metal sheet 327, the thirty-third square ring metal sheet 333 to the thirty-fifth square ring metal sheet 335, the forty-first square ring metal sheet 341 to the forty-third square ring metal sheet 343, the forty-ninth square ring metal sheet 349 to the fifty-first square ring metal sheet 351, and the fifty-seventh square ring metal sheet 357 to the fifty-ninth square ring metal sheet 359 have the same structure and are the first group;

[0069] The fourth square ring metal sheet 34 to the eighth square ring metal sheet 38, the twelfth square ring metal sheet 312 to the sixteenth square ring metal sheet 316, the twentieth square ring metal sheet 320 to the twenty-fourth square ring metal sheet 324, the twenty-eighth square ring metal sheet 328 to the thirty-second square ring metal sheet 332, the thirty-sixth square ring metal sheet 336 to the fortieth square ring metal sheet 340, the forty-fourth square ring metal sheet 344 to the forty-eighth square ring metal sheet 348, the fifty-second square ring metal sheet 352 to the fifty-sixth square ring metal sheet 356, and the sixtieth square ring metal sheet 360 to the sixty-fourth square ring metal sheet 364 have exactly the same structure and belong to the second group.

[0070] As a specific example, in the first group of the second layer metal patch 3, the main body of the first square ring metal patch 31 is composed of a side length of W 1 The square with side length W is subtracted from the square with side length W;

[0071] In the second group of the second layer of metal patches 3, the main body of the fourth square ring metal patch 34 is composed of a side length of W 2 The square minus the side length is W 3 of square composition.

[0072] As a specific example, the 8×8 cross-intersecting rectangular metal sheets of the third layer of metal patch 5 are the first cross-intersecting rectangular metal sheet 51 to the sixty-fourth cross-intersecting rectangular metal sheet 564;

[0073] The first to third cross-intersecting rectangular metal sheets 51 to 53, the ninth to eleventh cross-intersecting rectangular metal sheets 59 to 511, the seventeenth to nineteenth cross-intersecting rectangular metal sheets 517 to 519, the twenty-fifth to twenty-seventh cross-intersecting rectangular metal sheets 525 to 527, the thirty-third to thirty-fifth cross-intersecting rectangular metal sheets 533 to 535, the forty-first to forty-third cross-intersecting rectangular metal sheets 541 to 543, the forty-ninth to fifty-first cross-intersecting rectangular metal sheets 549 to 51st cross-intersecting rectangular metal sheets 551, and the fifty-seventh to fifty-ninth cross-intersecting rectangular metal sheets 557 to 559 have the same structure and are the first group;

[0074] The fortieth to fifth cross-intersecting rectangular metal sheets 54 to 55, the twelfth to thirteenth cross-intersecting rectangular metal sheets 512 to 513, the twentieth to twenty-first cross-intersecting rectangular metal sheets 520 to 521, the twenty-eighth to twenty-ninth cross-intersecting rectangular metal sheets 528 to 529, the thirty-sixth to thirty-seventh cross-intersecting rectangular metal sheets 536 to 537, the forty-fourth to forty-fifth cross-intersecting rectangular metal sheets 544 to 545, the fifty-second to fifty-third cross-intersecting rectangular metal sheets 552 to 553, and the sixtieth to sixty-first cross-intersecting rectangular metal sheets 560 to 561 have the same structure and belong to the second group;

[0075] The seventh cross-intersecting rectangular metal sheet 57 to the eighth cross-intersecting rectangular metal sheet 58, the fourteenth cross-intersecting rectangular metal sheet 514 to the sixteenth cross-intersecting rectangular metal sheet 516, the twenty-second cross-intersecting rectangular metal sheet 522 to the twenty-fourth cross-intersecting rectangular metal sheet 524, the thirtieth cross-intersecting rectangular metal sheet 530 to the thirty-second cross-intersecting rectangular metal sheet 532, the thirty-eighth cross-intersecting rectangular metal sheet 538 to the fortieth cross-intersecting rectangular metal sheet 540, the forty-sixth cross-intersecting rectangular metal sheet 546 to the forty-eighth cross-intersecting rectangular metal sheet 548, the fifty-fourth cross-intersecting rectangular metal sheet 554 to the fifty-sixth cross-intersecting rectangular metal sheet 556, and the sixty-second cross-intersecting rectangular metal sheet 562 to the sixty-fourth cross-intersecting rectangular metal sheet 564 have exactly the same structure and belong to the third group.

[0076] As a specific example, in the first group of the third layer of metal patches 5, the main body of the first cross-intersecting rectangular metal patch 51 is composed of two 4 , a rectangle with a length of P intersects crosswise;

[0077] In the second group of the third layer of metal patches 5, the main body of the fourth cross-intersecting rectangular metal patch 54 is composed of two rectangular metal patches with a width of W. 5 , a rectangle with a length of P intersects crosswise;

[0078] In the third group of the third layer of metal patches 5, the main body of the sixth cross-intersecting rectangular metal patch 56 is composed of two rectangular metal patches with a width of W. 6 , formed by the cross intersection of rectangles with a length of P.

[0079] As a specific example, the size of the first dielectric substrate 2 is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the second dielectric substrate 4 is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the third dielectric substrate 7 is 64 mm×64 mm, and the thickness is 3.175 mm; the material of all dielectric substrates is Rogers RT5880;

[0080] In the fourth layer of metal patch 6, the first rectangular metal sheet 61 has a longitudinal length of 13.5 mm and a transverse length of 13.1 mm; the second rectangle 611 extends transversely from left to right; the middle of the N-shaped 612 is the third rectangle 6121, the left side is the fourth rectangle 6122, and the right side is the fifth rectangle 6123, and the three rectangles have the same width;

[0081] The radius of the first metal through hole 613 is 0.64 mm, and the radius of the first circular gap 81 is 1.472 mm.

[0082] As a specific example, the height H between the partially reflective metasurface and the feed antenna satisfies the following formula:

[0083] H=H L =H H

[0084]

[0085] The subscripts L and U represent the low frequency band and the high frequency band, respectively. is the reflection phase of the upper partially reflective metasurface, λ is the free space wavelength at the operating frequency, and N represents an integer.

[0086] As a specific example, the deflection angle α of the FP resonant cavity antenna satisfies the following formula:

[0087]

[0088] in, is the reflection phase of the upper partially reflective metasurface, and N represents an integer.

[0089] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0090] Example

[0091] Combination Figure 1a to Figure 1g The present invention provides a dual-band shared aperture beam deflection FP resonant cavity antenna, comprising a first metal patch 1, a first dielectric substrate 2, a second metal patch 3, a second dielectric substrate 4, a third metal patch 5, a fourth metal patch 6, a third dielectric substrate 7, and a fifth metal patch 8, which are arranged in sequence from top to bottom;

[0092] The first layer of metal patch 1 is composed of 8×8 metal sheets, and the main body of each metal sheet is a square structure with I-shaped hollowing; there are 64 metal sheets in total, which are divided into 3 groups, and each group has different parameters, which are used to adjust the high-frequency transmission and reflection performance of the metasurface;

[0093] The second layer of metal patches 3 is laid flat on the upper surface of the second layer of dielectric substrate 4, and is composed of 8×8 square ring metal patches, which are divided into 2 groups, and the parameters of each group are different;

[0094] The third layer of metal patches 5 is laid flat on the lower surface of the second layer of dielectric substrate 4, and is composed of 8×8 cross-intersecting rectangular metal patches, which are divided into 3 groups and are used to control low-frequency transmission and reflection performance;

[0095] The fourth layer of metal patch 6 is composed of a first rectangular metal sheet, wherein the first rectangular metal sheet 61 is hollowed out by the second rectangular 611 above and the N-type 612 below; a first metal through hole 613 is etched on the first rectangular metal sheet 61, and the first metal through hole 613 penetrates the third layer of dielectric substrate 7 and connects the fourth layer of metal patch 6;

[0096] The third layer dielectric substrate 7 is penetrated by the first metal through hole 613 and connected to the fourth layer metal patch 6;

[0097] The fifth metal patch 8 is spread over the entire lower surface of the third dielectric substrate 7 and a first circular gap 81 is etched to improve the isolation during coaxial feeding.

[0098] The 64 metal sheets of the first layer of metal patches 1 are first to sixty-fourth metal sheets 11 to 164 from left to right and from top to bottom.

[0099] The main body of the first metal sheet 11 is composed of a first square metal sheet 101 and a hollow first I-shaped pattern 1011. The side length of the first square metal sheet 101 is L, and the inner ring radius of the hollow first I-shaped pattern 1011 is r. 1 , the outer ring radius is r 2 , angle is the;

[0100] The first to third metal sheets 11-13, the ninth to eleventh metal sheets 19-111, the seventeenth to nineteenth metal sheets 117-119, the twenty-fifth to twenty-seventh metal sheets 125-127, the thirty-third to thirty-fifth metal sheets 133-135, the forty-first to forty-third metal sheets 141-143, the forty-ninth to fifty-first metal sheets 149-151, and the fifty-seventh to fifty-ninth metal sheets 157-159 have exactly the same structure and belong to the first group.

[0101] The main body of the fourth metal sheet 14 is composed of the second square metal sheet 104 and the hollowed-out second I-shaped pattern 1041;

[0102] The side length of the second square metal sheet 104 is L 1 The inner ring radius of the hollowed-out second I-type pattern 1041 is r 3 , the outer ring radius is r 4 , angle is bate;

[0103] The fourth and fifth metal sheets 14 and 15, the twelfth and thirteenth metal sheets 112 and 113, the twentieth and twenty-first metal sheets 120 and 121, the twenty-eighth and twenty-ninth metal sheets 128 and 129, the thirty-sixth and thirty-seventh metal sheets 136 and 137, the forty-fourth and forty-fifth metal sheets 144 and 145, the fifty-second and fifty-third metal sheets 152 and 153, and the sixtieth and sixty-first metal sheets 160 and 161 have exactly the same structure and belong to the second group.

[0104] The main body of the sixth metal sheet 16 is composed of a third square metal sheet 106 and a hollow third I-shaped pattern 1061;

[0105] The side length of the third square metal sheet 106 is L2 The inner ring radius of the hollowed-out third I-type figure 1061 is r 5 , the outer ring radius is r 6 , angle is Alpha;

[0106] The sixth to eighth metal sheets 16-18, the fourteenth to sixteenth metal sheets 114-116, the twenty-second to twenty-fourth metal sheets 122-124, the thirtieth to thirty-second metal sheets 130-132, the thirty-eighth to fortieth metal sheets 138-140, the forty-sixth to forty-eighth metal sheets 146-148, the fifty-fourth to fifty-sixth metal sheets 154-156, and the sixty-second to sixty-fourth metal sheets 162-164 have exactly the same structure and belong to the third group.

[0107] The 8×8 square ring metal sheets of the second layer of metal patch 3 are the first to sixty-fourth square ring metal sheets 31 to 364;

[0108] The main body of the first square ring metal sheet 31 is composed of a 1 It is generated by subtracting the square with side length W from the square with side length W;

[0109] The first to third square ring metal sheets 31-33, the ninth to eleventh square ring metal sheets 39-311, the seventeenth to nineteenth square ring metal sheets 317-319, the twenty-fifth to twenty-seventh square ring metal sheets 325-327, the thirty-third to thirty-fifth square ring metal sheets 333-335, the forty-first to forty-third square ring metal sheets 341-343, the forty-ninth to fifty-first square ring metal sheets 349-351, and the fifty-seventh to fifty-ninth square ring metal sheets 357-359 have exactly the same structure and belong to the first group.

[0110] The main body of the fourth square ring metal sheet 34 is composed of a side length of W 2 The square minus the side length is W 3 The square is generated;

[0111] The fourth to eighth square ring metal sheets 34-38, the twelfth to sixteenth square ring metal sheets 312-316, the twentieth to twenty-fourth square ring metal sheets 320-324, the twenty-eighth to thirty-second square ring metal sheets 328-332, the thirty-sixth to fortieth square ring metal sheets 336-340, the forty-fourth to forty-eighth square ring metal sheets 344-348, the fifty-second to fifty-sixth square ring metal sheets 352-356, and the sixtieth to sixty-fourth square ring metal sheets 360-364 have exactly the same structure and belong to the second group.

[0112] The 8×8 cross-intersecting rectangular metal sheets of the third layer of metal patches 5 are the first to sixty-fourth cross-intersecting rectangular metal sheets 51 to 564;

[0113] The main body of the first cross-intersecting rectangular metal sheet 51 is composed of two 4 , a rectangle with a length of P intersects crosswise;

[0114] The first to thirtieth cross-intersecting rectangular metal sheets 51-53, the ninth to eleventh cross-intersecting rectangular metal sheets 59-511, the seventeenth to nineteenth cross-intersecting rectangular metal sheets 517-519, the twenty-fifth to twenty-seventh cross-intersecting rectangular metal sheets 525-527, the thirty-third to thirty-fifth cross-intersecting rectangular metal sheets 533-535, the forty-first to forty-third cross-intersecting rectangular metal sheets 541-543, the forty-ninth to fifty-first cross-intersecting rectangular metal sheets 549-551, and the fifty-seventh to fifty-ninth cross-intersecting rectangular metal sheets 557-559 have exactly the same structure and belong to the first group.

[0115] The main body of the fourth cross-intersecting rectangular metal sheet 54 is composed of two 5 , a rectangle with a length of P intersects crosswise;

[0116] The fourth to fifth cross-intersecting rectangular metal sheets 54-55, the twelfth to thirteenth cross-intersecting rectangular metal sheets 512-513, the twentieth to twenty-first cross-intersecting rectangular metal sheets 520-521, the twenty-eighth to twenty-ninth cross-intersecting rectangular metal sheets 528-529, the thirty-sixth to thirty-seventh cross-intersecting rectangular metal sheets 536-537, the forty-fourth to forty-fifth cross-intersecting rectangular metal sheets 544-545, the fifty-second to fifty-third cross-intersecting rectangular metal sheets 552-553, and the sixtieth to sixty-first cross-intersecting rectangular metal sheets 560-561 have exactly the same structure and belong to the second group.

[0117] The main body of the sixth cross-intersecting rectangular metal sheet 56 is composed of two 6 , a rectangle with a length of P intersects crosswise;

[0118] The sixth to eighth cross-intersecting rectangular metal sheets 56-58, the fourteenth to sixteenth cross-intersecting rectangular metal sheets 514-516, the twenty-second to twenty-fourth cross-intersecting rectangular metal sheets 522-524, the thirtieth to thirty-second cross-intersecting rectangular metal sheets 530-532, the thirty-eighth to fortieth cross-intersecting rectangular metal sheets 538-540, the forty-sixth to forty-eighth cross-intersecting rectangular metal sheets 546-548, the fifty-fourth to fifty-sixth cross-intersecting rectangular metal sheets 554-556, and the sixty-second to sixty-fourth cross-intersecting rectangular metal sheets 562-564 have exactly the same structure and belong to the third group.

[0119] In the fourth layer of metal patch 6, the first rectangular metal sheet 61 has a longitudinal length of 13.5 mm and a transverse length of 13.1 mm; the second rectangle 611 extends transversely from left to right; the middle of the N-type 612 is the third rectangle 6121, the left side is the fourth rectangle 6122, and the right side is the fifth rectangle 6123, and the three rectangles have the same width.

[0120] The radius of the first circular gap 81 etched in the fifth-layer metal patch 8 is larger than the radius of the first metal through hole 613 , and the centers of the two circles are at the same position.

[0121] The design process of the present invention is as follows:

[0122] (i) The thickness of the first dielectric substrate 2 is 0.254 mm and the dielectric constant is 2.2. The thickness of the second dielectric substrate 4 is 0.254 mm and the dielectric constant is 2.2. The thickness of the third dielectric substrate 7 is 3.175 mm and the dielectric constant is 2.2.

[0123] (ii) the first layer of metal patch 1 and the third layer of metal patch 5 enable the antenna to achieve beam deflection performance by changing different parameters;

[0124] (iii) The fifth metal patch 8 uses a coaxial line feeding method to make the antenna simpler;

[0125] Combination Figure 1a to Figure 1g The dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention, the material of the first dielectric substrate 2 is Roger RT5880, the dielectric constant ε r =2.2, thickness is 0.254mm, size is 64mm×64mm×0.254mm, the material of the second dielectric substrate 4 is Roger RT5880, dielectric constant ε r =2.2, thickness is 0.254mm, size is 64mm×64mm×0.254mm; the material of the third dielectric substrate 7 is Roger RT5880, dielectric constant ε r=2.2, thickness is 3.175mm, size is 64mm×64mm×3.175mm; the radius of the through hole 613 penetrating the third layer of dielectric substrate 7 is 0.64mm, and the radius of the circular gap 81 on the fifth layer of metal patch 8 is 1.472mm.

[0126] Figure 2 is the S of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention. 11 According to the curve chart, the first frequency band of the dual-band shared aperture beam deflection FP resonant cavity antenna is 5.54-6.48 GHz, the absolute bandwidth is 0.94 GHz, the relative bandwidth is 15.6%, and the second frequency band is 9.62-10.52 GHz, the absolute bandwidth is 0.9 GHz, and the relative bandwidth is 9%. The antenna can work independently in two frequency bands.

[0127] Figure 3 It is a curve graph showing the gain variation with frequency of the dual-band shared aperture beam deflection FP cavity antenna of the present invention. The peak gain in the first frequency band is 7.1dBi, and the peak gain in the second frequency band is 8.28dBi. Compared with a single coaxial antenna, the gain remains relatively stable after adding a partial reflective metasurface at low frequencies, and the gain is improved after adding a partial reflective metasurface at high frequencies.

[0128] Figure 4 The xoz plane radiation pattern of the dual-band shared aperture beam deflection FP resonant cavity antenna of the present invention at 6 GHz and 10 GHz, the antenna beam is deflected by 22° at 6 GHz, and the antenna beam is deflected by 306° (-54°) at 10 GHz.

[0129] Figure 5 The invention discloses a yoz surface radiation pattern of a dual-band shared aperture beam deflected FP resonant cavity antenna at 6GHz and 10GHz. The yoz surface radiation pattern of the dual-band shared aperture beam deflected FP resonant cavity antenna is stable, the cross polarization is less than -5dBic, and the back lobe radiation is less than -10dBic.

[0130] In summary, the dual-band shared aperture beam deflection FP cavity antenna of the present invention can operate independently in two frequency bands, and the gain remains relatively stable after adding a partial reflective metasurface at low frequencies, and the gain is improved after adding a partial reflective metasurface at high frequencies. The antenna beam deflection angle achieves the expected effect, the structure is simple, and it is easy to process and implement.

Claims

1. A dual-band shared aperture beam steering FP resonant cavity antenna, characterized in that: The invention comprises a partially reflective metasurface and a feed antenna arranged thereunder; the partially reflective metasurface comprises a first metal patch (1), a first dielectric substrate (2), a second metal patch (3), a second dielectric substrate (4), and a third metal patch (5) arranged in sequence from top to bottom; the feed antenna comprises a fourth metal patch (6), a third dielectric substrate (7), and a fifth metal patch (8) arranged in sequence from top to bottom, wherein: The first layer of metal patches (1) is composed of an 8×8 metal patch array, and the main body of each metal patch is a square structure with an I-shaped hollowing out; a total of 64 metal patches are divided into 3 groups according to columns, and from left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group. The parameters of each group are different, and are used to adjust the high-frequency transmission and reflection performance of the metasurface; The second layer of metal patches (3) is laid flat on the upper surface of the second layer of dielectric substrate (4), and is composed of 8×8 square ring metal patches, which are divided into two groups. From left to right, the first to third columns are the first group, and the fourth to eighth columns are the second group. The parameters of each group are different. The third layer of metal patches (5) is laid flat on the lower surface of the second layer of dielectric substrate (4), and is composed of 8×8 cross-intersecting rectangular metal patches, which are divided into 3 groups. From left to right, the first to third columns are the first group, the fourth to fifth columns are the second group, and the sixth to eighth columns are the third group, and are used to control low-frequency transmission and reflection performance; The fourth-layer metal patch (6) comprises a first rectangular metal sheet (61), the top of the first rectangular metal sheet (61) is hollowed out to provide a second rectangle (611), the lower portion of the second rectangle (611) is hollowed out to provide an N-type (612), the N-type (612) is formed by sequentially connecting three rectangles to form a rectangular frame with an open bottom, a first metal through hole (613) is etched in the rectangular frame, and the first metal through hole (613) penetrates the third-layer dielectric substrate (7) and is connected to the fourth-layer metal patch (6); The fifth layer of metal patch (8) is laid flat on the entire lower surface of the third layer of dielectric substrate (7), and a first circular gap (81) is etched, wherein the radius of the first circular gap (81) is greater than the radius of the first metal through hole (613), and the two have the same center position, so as to improve the isolation during coaxial feeding.

2. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 1, characterized in that: The 8×8 metal sheets of the first layer of metal patches (1) are, from left to right and from top to bottom, the first metal sheet (11) to the sixty-fourth metal sheet (164); The first metal sheet (11) to the third metal sheet (13), the ninth metal sheet (19) to the eleventh metal sheet (111), the seventeenth metal sheet (117) to the nineteenth metal sheet (119), the twenty-fifth metal sheet (125) to the twenty-seventh metal sheet (127), the thirty-third metal sheet (133) to the thirty-fifth metal sheet (135), the forty-first metal sheet (141) to the forty-third metal sheet (143), the forty-ninth metal sheet (149) to the fifty-first metal sheet (151), and the fifty-seventh metal sheet (157) to the fifty-ninth metal sheet (159) have the same structure and are the first group; The fourth metal sheet (14) to the fifth metal sheet (15), the twelfth metal sheet (112) to the thirteenth metal sheet (113), the twentieth metal sheet (120) to the twenty-first metal sheet (121), the twenty-eighth metal sheet (128) to the twenty-ninth metal sheet (129), the thirty-sixth metal sheet (136) to the thirty-seventh metal sheet (137), the forty-fourth metal sheet (144) to the forty-fifth metal sheet (145), the fifty-second metal sheet (152) to the fifty-third metal sheet (153), and the sixtieth metal sheet (160) to the sixty-first metal sheet (161) have the same structure and belong to the second group; The seventh metal sheet (17) to the eighth metal sheet (18), the fourteenth metal sheet (114) to the sixteenth metal sheet (116), the twenty-second metal sheet (122) to the twenty-fourth metal sheet (124), the thirtieth metal sheet (130) to the thirty-second metal sheet (132), the thirty-eighth metal sheet (138) to the fortieth metal sheet (140), the forty-sixth metal sheet (146) to the forty-eighth metal sheet (148), the fifty-fourth metal sheet (154) to the fifty-sixth metal sheet (156), and the sixty-second metal sheet (162) to the sixty-fourth metal sheet (164) have exactly the same structure and belong to the third group.

3. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 2, characterized in that: In the first group of the first layer of metal patches (1), the main body of the first metal sheet (11) is composed of a first square metal sheet (101) and a hollow first I-shaped figure (1011); the side length of the first square metal sheet (101) is L, and the hollow first I-shaped figure (1011) is composed of a first arc connected to the upper and lower ends of a central straight line, the centers of the two first arcs are on the central straight line, and the first I-shaped figure (1011) is symmetrical about the center, the inner ring radius of the first arc is r1, the outer ring radius is r2, and the angle is the; In the second group of the first layer of metal patches (1), the main body of the fourth metal sheet (14) is composed of a second square metal sheet (104) and a hollowed-out second I-shaped pattern (1041); the side length of the second square metal sheet (104) is L1, the hollowed-out second I-shaped pattern (1041) is composed of a middle straight line with a second arc connected at the upper and lower ends, the centers of the two second arcs are on the middle straight line, and the second I-shaped pattern (1041) is symmetrical about the center, the inner ring radius of the second arc is r3, the outer ring radius is r4, and the angle is bate; In the third group of the first layer of metal patches (1), the main body of the sixth metal sheet (16) is composed of a third square metal sheet (106) and a hollow third I-shaped figure (1061); the side length of the third square metal sheet (106) is L2, and the hollow third I-shaped figure (1061) is composed of a third arc connected to the upper and lower ends of a central straight line, the centers of the two third arcs are on the central straight line, and the third I-shaped figure (1061) is symmetrical about the center, the inner ring radius of the third arc is r5, the outer ring radius is r6, and the angle is Alpha.

4. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 1, characterized in that: The 8×8 square ring metal sheets of the second layer of metal patches (3) are the first square ring metal sheet (31) to the sixty-fourth square ring metal sheet (364); The first square ring metal sheet (31) to the third square ring metal sheet (33), the ninth square ring metal sheet (39) to the eleventh square ring metal sheet (311), the seventeenth square ring metal sheet (317) to the nineteenth square ring metal sheet (319), the twenty-fifth square ring metal sheet (325) to the twenty-seventh square ring metal sheet (327), the thirty-third square ring metal sheet (333) to the thirty-fifth square ring metal sheet (335), the forty-first square ring metal sheet (341) to the forty-third square ring metal sheet (343), the forty-ninth square ring metal sheet (349) to the fifty-first square ring metal sheet (351), and the fifty-seventh square ring metal sheet (357) to the fifty-ninth square ring metal sheet (359) have the same structure and are the first group; The fourth square ring metal sheet (34) to the eighth square ring metal sheet (38), the twelfth square ring metal sheet (312) to the sixteenth square ring metal sheet (316), the twentieth square ring metal sheet (320) to the twenty-fourth square ring metal sheet (324), the twenty-eighth square ring metal sheet (328) to the thirty-second square ring metal sheet (332), the thirty-sixth square ring metal sheet (336) to the fortieth square ring metal sheet (340), the forty-fourth square ring metal sheet (344) to the forty-eighth square ring metal sheet (348), the fifty-second square ring metal sheet (352) to the fifty-sixth square ring metal sheet (356), and the sixtieth square ring metal sheet (360) to the sixty-fourth square ring metal sheet (364) have exactly the same structure and belong to the second group.

5. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 4, characterized in that: In the first group of the second layer of metal patches (3), the main body of the first square ring metal patch (31) is composed of a square with a side length of W1 minus a square with a side length of W; In the second group of the second layer of metal patches (3), the main body of the fourth square ring metal patch (34) is composed of a square with a side length of W2 minus a square with a side length of W3.

6. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 1, characterized in that: The 8×8 cross-intersecting rectangular metal sheets of the third layer of metal patches (5) are the first cross-intersecting rectangular metal sheet (51) to the sixty-fourth cross-intersecting rectangular metal sheet (564); The first cross-intersecting rectangular metal sheet (51) to the third cross-intersecting rectangular metal sheet (53), the ninth cross-intersecting rectangular metal sheet (59) to the eleventh cross-intersecting rectangular metal sheet (511), the seventeenth cross-intersecting rectangular metal sheet (517) to the nineteenth cross-intersecting rectangular metal sheet (519), the twenty-fifth cross-intersecting rectangular metal sheet (525) to the twenty-seventh cross-intersecting rectangular metal sheet (527), the thirty-third cross-intersecting rectangular metal sheet (533) to the thirty-fifth cross-intersecting rectangular metal sheet (535), the forty-first cross-intersecting rectangular metal sheet (541) to the forty-third cross-intersecting rectangular metal sheet (543), the forty-ninth cross-intersecting rectangular metal sheet (549) to the fifty-first cross-intersecting rectangular metal sheet (551), and the fifty-seventh cross-intersecting rectangular metal sheet (557) to the fifty-ninth cross-intersecting rectangular metal sheet (559) have the same structure and are the first group; The fortieth cross-intersecting rectangular metal sheet (54) to the fifth cross-intersecting rectangular metal sheet (55), the twelfth cross-intersecting rectangular metal sheet (512) to the thirteenth cross-intersecting rectangular metal sheet (513), the twentieth cross-intersecting rectangular metal sheet (520) to the twenty-first cross-intersecting rectangular metal sheet (521), the twenty-eighth cross-intersecting rectangular metal sheet (528) to the twenty-ninth cross-intersecting rectangular metal sheet (529), the thirty-sixth cross-intersecting rectangular metal sheet (536) to the thirty-seventh cross-intersecting rectangular metal sheet (537), the forty-fourth cross-intersecting rectangular metal sheet (544) to the forty-fifth cross-intersecting rectangular metal sheet (545), the fifty-second cross-intersecting rectangular metal sheet (552) to the fifty-third cross-intersecting rectangular metal sheet (553), and the sixtieth cross-intersecting rectangular metal sheet (560) to the sixty-first cross-intersecting rectangular metal sheet (561) have the same structure and belong to the second group; The seventh cross-intersecting rectangular metal sheet (57) to the eighth cross-intersecting rectangular metal sheet (58), the fourteenth cross-intersecting rectangular metal sheet (514) to the sixteenth cross-intersecting rectangular metal sheet (516), the twenty-second cross-intersecting rectangular metal sheet (522) to the twenty-fourth cross-intersecting rectangular metal sheet (524), the thirtieth cross-intersecting rectangular metal sheet (530) to the thirty-second cross-intersecting rectangular metal sheet (532), the thirty-eighth cross-intersecting rectangular metal sheet (538) to the fortieth cross-intersecting rectangular metal sheet (540), the forty-sixth cross-intersecting rectangular metal sheet (546) to the forty-eighth cross-intersecting rectangular metal sheet (548), the fifty-fourth cross-intersecting rectangular metal sheet (554) to the fifty-sixth cross-intersecting rectangular metal sheet (556), and the sixty-second cross-intersecting rectangular metal sheet (562) to the sixty-fourth cross-intersecting rectangular metal sheet (564) have the same structure and belong to the third group.

7. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 6, characterized in that: In the first group of the third layer of metal patches (5), the main body of the first cross-intersecting rectangular metal patch (51) is formed by the cross-intersection of two rectangles with a width of W4 and a length of P; In the second group of the third layer of metal patches (5), the main body of the fourth cross-intersecting rectangular metal patch (54) is formed by the intersection of two rectangular crosses with a width of W5 and a length of P; In the third group of the third layer of metal patches (5), the main body of the sixth cross-intersecting rectangular metal patch (56) is formed by the intersection of two rectangular crosses with a width of W6 and a length of P.

8. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 1, characterized in that: The size of the first dielectric substrate (2) is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the second dielectric substrate (4) is 64 mm×64 mm, and the thickness is 0.254 mm; the size of the third dielectric substrate (7) is 64 mm×64 mm, and the thickness is 3.175 mm; the material of all dielectric substrates is Rogers RT5880; In the fourth layer of metal patches (6), the first rectangular metal patch (61) has a longitudinal length of 13.5 mm and a transverse length of 13.1 mm; the second rectangle (611) extends transversely from left to right; the middle of the N-shaped (612) is the third rectangle (6121), the left side is the fourth rectangle (6122), and the right side is the fifth rectangle (6123), and the three rectangles have the same width; The radius of the first metal through hole (613) is 0.64 mm, and the radius of the first circular gap (81) is 1.472 mm.

9. The dual-band shared aperture beam steering FP resonant cavity antenna according to any one of claims 1 to 8, characterized in that: The height H between the partially reflective metasurface and the feed antenna satisfies the following formula: H=H L =H H The subscripts L and U represent the low frequency band and the high frequency band, respectively. is the reflection phase of the upper partially reflective metasurface, λ is the free space wavelength at the operating frequency, and N represents an integer.

10. The dual-band shared aperture beam steering FP resonant cavity antenna according to claim 9, characterized in that: The deflection angle α of the FP resonant cavity antenna satisfies the following formula: in, is the reflection phase of the upper partially reflective metasurface, and N represents an integer.

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