CN115347359B - A Broadband High Gain Circularly Polarized Magnetoelectric Dipole Antenna Array - Google Patents

Abstract

The invention discloses a broadband high-gain circularly polarized magnetic dipole antenna array, which comprises an upper metal patch, an upper medium substrate, a middle metal patch, a lower medium substrate and a lower metal patch which are arranged from top to bottom, wherein the upper metal patch consists of four groups of metal sheet units with identical structures, each group of metal sheet units consists of 5 metal sheets, and circular polarization characteristics are realized by adopting structures of rectangular metal sheet chamfer and rectangular perturbation addition; meanwhile, each group of metal sheet units is provided with a plurality of metal through holes penetrating through the upper medium substrate and connecting the upper metal patch and the middle metal patch; the middle layer metal patch is flatly paved on the upper surface of the whole lower layer dielectric substrate and is etched with four circular through holes; the lower layer dielectric substrate is penetrated by four metal through holes and is connected with the middle layer metal patch and the lower layer metal patch; the lower metal patch adopts a microstrip line to form a quarter-turn power divider. The antenna has the advantages of wide frequency band, wide axial ratio bandwidth, high gain and small volume.

Description

A Broadband High Gain Circularly Polarized Magnetoelectric Dipole Antenna Array

technical field

The invention relates to the technical field of circularly polarized magnetoelectric dipole antennas, in particular to a wide-band high-gain circularly polarized magnetoelectric dipole antenna array.

Background technique

With the rapid development of modern wireless communication technology, there are more and more wireless devices working in different frequency bands, and the design space left for a single antenna is becoming more and more limited. On the same carrier, the more wireless communication devices, the more complex the electromagnetic environment, and the mutual interference between different antennas will greatly affect the performance of the antenna. There is an urgent need for an antenna that can work in multiple communication systems and is compatible with multiple communication frequency bands, so as to reduce the number of antennas and realize the miniaturization of equipment. Therefore, broadband antennas become one of the main trends in antenna design.

The frequency of electromagnetic waves is high, the wavelength is short, the penetration is poor, and the attenuation is large. In the case of the same coverage area, more antennas need to be placed, and the amount of data transmission increases dramatically. Compared with linearly polarized antennas, circularly polarized antennas can suppress multipath interference, have small polarization deflection loss, and can resist the influence of bad weather. Therefore, it is necessary to develop circularly polarized antennas with wide frequency bands.

Contents of the invention

The object of the present invention is to provide a wide-band high-gain circularly polarized magnetoelectric dipole antenna array that is simple in structure and easy to realize.

The technical solution to realize the object of the present invention is: a wide-band high-gain circularly polarized magnetoelectric dipole antenna array, including an upper layer metal patch, an upper layer dielectric substrate, a middle layer metal patch, and a lower layer dielectric patch arranged from top to bottom. Substrate, lower layer metal patch, of which:

The upper layer metal patch is composed of four groups of metal sheet units with identical structures, each group of metal sheet units is composed of 5 metal sheets, and the circular polarization characteristics are realized by using rectangular metal sheet cutting corners and adding rectangular perturbation structures respectively; At the same time, each group of metal sheet units is provided with a plurality of metal through holes, which penetrate the upper dielectric substrate and connect the upper layer metal patch and the middle layer metal patch;

The middle layer metal patch tiles the entire upper surface of the lower layer dielectric substrate and etches four circular through holes; the lower layer dielectric substrate is penetrated by four metal through holes, connecting the middle layer metal patch and the lower layer metal patch;

The metal patches on the lower layer use microstrip lines to form a one-to-four power divider.

Furthermore, the upper metal patch is composed of 4 groups of metal sheet units with the same structure, which are arranged in a 2×2 array. They are the first group of metal sheet units in the upper left corner and the second group of metal sheet units in the upper right corner. , the third group of metal sheet units in the lower right corner and the fourth group of metal sheet units in the lower left corner;

The first group of metal sheet units is composed of 5 metal sheets, which are the first metal sheet in the upper left corner, the second metal sheet in the upper right corner, the third metal sheet in the lower right corner, and the fourth metal sheet in the lower left corner And the fifth metal sheet arranged in the middle position; the first metal sheet and the third metal sheet have the same structure and the two are arranged symmetrically about the center, the first metal sheet adopts the first triangular metal sheet cut off from the rectangular metal sheet, and the second metal sheet is etched A metal through-hole array; the third metal sheet adopts the rectangular metal sheet to cut off the second triangular metal sheet, and etches the third metal through-hole array; the second metal sheet and the fourth metal sheet have the same structure and they are arranged symmetrically about the center For the second metal sheet, the sixth metal sheet is added to the upper right corner of the rectangular metal sheet, and the second metal via array is etched; for the fourth metal sheet, the seventh metal sheet is added to the lower left corner of the rectangular metal sheet, and the fourth metal via is etched. hole array;

The first metal via hole is etched on the left side of the fifth metal sheet, and the second metal via hole and the third metal sheet unit are respectively etched at the same position on the left side of the second group of metal sheet units, the third group of metal sheet units, and the fourth group of metal sheet units. vias, fourth metal vias.

Further, the structure of the second metal via array is the same as that of the first metal via array, and they are arranged symmetrically from left to right; the structure of the third metal via array is the same as that of the first metal via array, and they are arranged symmetrically about the center; The structure of the four-metal through-hole array is the same as that of the first metal through-hole array, and they are arranged symmetrically up and down;

At the position corresponding to the first group of metal sheet units, the upper dielectric substrate is surrounded by the first metal via array, the second metal via array, the third metal via array, and the fourth metal via array in the first group of metal sheet units. The hole array and the first metal vias penetrate through to form a first group of metal vias;

Similarly, at positions corresponding to the second group of metal sheet units, the third group of metal sheet units, and the fourth group of metal sheet units, the second group of metal through holes, the third group of metal through holes, the The fourth group of metal vias.

Further, the metal patch in the middle layer tiles the entire upper surface of the lower dielectric substrate, and consists of four identical sets of through holes, namely the first set of through holes in the upper left corner and the second set of through holes in the upper right corner. Holes, the third group of through holes in the lower right corner and the fourth group of through holes in the lower left corner;

At the position corresponding to the first group of metal sheet units, the middle layer metal patch is surrounded by the first metal via array, the second metal via array, the third metal via array, and the fourth metal via array in the first group of metal sheet units. The metal through hole array runs through to form the first group of through holes; similarly, at the positions corresponding to the second group of metal sheet units, the third group of metal sheet units, and the fourth group of metal sheet units, the metal patches on the middle layer are respectively forming a second group of through holes, a third group of through holes, and a fourth group of through holes;

A circular through hole is respectively etched in the first group of through holes, the second group of through holes, the third group of through holes, and the fourth group of through holes, which are respectively the first circular through hole, the second circular through hole, the Three circular through holes and a fourth circular through hole; the first to fourth circular through holes are arranged one by one under the orthographic projections of the first to fourth metal through holes, and the corresponding positions of the circular through holes and the metal through holes The positions of the centers of the circles are the same, and the radii of the first to fourth circular through holes are larger than those of the first to fourth metal through holes.

Further, the lower layer dielectric substrate is penetrated by the first to fourth metal vias for connecting the middle layer metal patch and the lower layer metal patch.

Further, the lower metal patch is a 1-to-4 power divider composed of microstrip lines, and the whole is composed of 7 parts, which are the eighth metal piece, the ninth metal piece, the tenth metal piece, and the eleventh metal piece. sheet, the twelfth metal sheet, the thirteenth metal sheet and the fourteenth metal sheet;

The ninth metal sheet and the tenth metal sheet are bilaterally symmetrical and identical in structure, the third triangle is etched in the upper right corner of the ninth metal sheet, and the fourth triangle is etched in the upper left corner of the tenth metal sheet;

The eleventh metal sheet, the twelfth metal sheet, the thirteenth metal sheet and the fourteenth metal sheet are identical in structure, wherein the eleventh metal sheet and the thirteenth metal sheet are symmetrical up and down, and the twelfth metal sheet and the thirteenth metal sheet are symmetrical up and down. The fourteenth metal sheet is symmetrical up and down; the fifth triangle is etched in the upper left corner of the eleventh metal sheet, the sixth triangle is etched in the lower left corner, and the upper right corner is penetrated by the first metal through hole; the seventh triangle is etched in the upper left corner of the twelfth metal sheet. Triangle, the eighth triangle is etched in the lower right corner, and the upper right corner is penetrated by the second metal via; the ninth triangle is etched in the upper left corner of the thirteenth metal sheet, the tenth triangle is etched in the lower left corner, and the lower right corner is penetrated by the fourth metal via The eleventh triangle is etched in the upper right corner of the fourteenth metal sheet, the twelfth triangle is etched in the lower left corner, and the lower right corner is penetrated by the third metal through hole.

Further, the energy is input from the eighth metal sheet, transmitted to the eleventh to fourteenth metal sheets through the ninth and tenth metal sheets, and then passes through the first to fourth through the first to fourth metal through holes. The circular through hole is transmitted to the first group to the fourth group of metal sheets to radiate outward. The metal patch in the middle layer is the common floor of the antenna and power divider, and the feeder is located in the metal patch in the lower layer.

Further, the first metal sheet and the third metal sheet have a trapezoidal structure.

Further, the twelfth metal sheet and the fourteenth metal sheet are respectively obtained by shifting the eleventh metal sheet and the thirteenth metal sheet to the right.

Further, the thickness of the upper dielectric substrate is 1.57mm, the thickness of the lower dielectric substrate is 0.254mm, and the overall height of the antenna is 1.824mm.

Compared with the prior art, the present invention has the following remarkable advantages: (1) adopting a rectangular patch cut corner and adding a rectangular perturbation structure to realize circular polarization characteristics, the structure is simple, easy to integrate, and the axial ratio bandwidth is widened; ( 2) A wider impedance bandwidth is obtained by using metal through-holes and circular through-holes to feed through holes; (3) A one-to-four power splitter composed of microstrip lines is used to enable the antenna to achieve high gain performance and has Stable radiation pattern, and the radiation direction is more concentrated.

Description of drawings

Fig. 1a is an antenna side view of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1b is a circuit diagram of the upper metal patch of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1c is a top view of the upper dielectric layer substrate of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1d is a circuit diagram of the metal patch in the middle layer of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1e is a top view of the lower dielectric substrate of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1f is a circuit diagram of the lower metal patch of the circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 1g is a top view of the circularly polarized magnetoelectric dipole antenna array of the present invention from the upper dielectric layer substrate to the lower metal patch.

Fig. 2 is the _S11 curve diagram of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 3 is an axial ratio curve diagram of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 4 is a gain curve diagram of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 5 is the E-plane radiation pattern at 40 GHz of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention.

Fig. 6 is an H-plane radiation pattern at 40 GHz of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention.

Detailed ways

The broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention includes three layers of metal patches and two layers of dielectric substrates, which are respectively the upper layer metal patch, the upper layer dielectric substrate, the middle layer metal patch, the lower layer dielectric substrate and the lower layer metal patch; the upper layer metal patch is composed of four groups of antenna units with the same structure, and each group of metal sheet units is composed of 5 metal sheets, and the rectangular metal sheet is used to cut corners and the structure of adding rectangular perturbation to realize the circular pole And it has a wider axial ratio frequency band. At the same time, each group of metal sheet units is equipped with 17 metal through holes, which penetrate the upper dielectric substrate and connect the upper layer and the middle layer metal patch; the middle layer metal patch tiles the entire lower layer dielectric Four circular through holes are etched on the upper surface of the substrate; the lower dielectric substrate is penetrated by four metal through holes, connecting the middle metal patch and the lower metal patch; The power splitter makes the antenna more compact, the radiation direction is more concentrated, and high gain characteristics are achieved. The antenna of the invention has the advantages of wide frequency band, wide axial ratio bandwidth, high gain and small volume.

The wideband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention has wide frequency band, wide axial ratio bandwidth and high gain characteristics. The performance is more stable. The antenna has a wider impedance bandwidth by using metal through-holes and circular through-holes for feeding. The upper metal patch adopts rectangular patch corner cutting and adds rectangular perturbation to achieve circular polarization. The antenna has a wider axial ratio frequency band.

1, the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention includes an upper layer metal patch 1, an upper layer dielectric substrate 2, an intermediate layer metal patch 3, a lower layer dielectric substrate 4, The lower metal patch 5, wherein:

The upper metal patch 1 is composed of four groups of metal sheet units with the same structure, and each group of metal sheet units is composed of 5 metal sheets, and the circular polarization characteristics are realized by cutting corners of rectangular metal sheets and adding rectangular perturbation. ;At the same time, each group of metal sheet units is provided with a plurality of metal through holes, which penetrate the upper dielectric substrate 2 and connect the upper layer metal patch 1 and the middle layer metal patch 3;

The middle layer metal patch 3 tiles the entire upper surface of the lower layer dielectric substrate 4 and etches four circular through holes; the lower layer dielectric substrate 4 is penetrated by four metal through holes, connecting the middle layer metal patch 3 and the lower layer metal patch 5;

The lower metal patch 5 uses a microstrip line to form a one-to-four power splitter.

As a specific example, the upper metal patch 1 is composed of 4 groups of metal sheet units with the same structure, which are arranged in a 2×2 array. Two sets of sheet metal units 12, the third set of sheet metal units 13 in the lower right corner and the fourth set of sheet metal units 14 in the lower left corner;

The first group of metal sheet units 11 is composed of five metal sheets, which are the first metal sheet 111 in the upper left corner, the second metal sheet 112 in the upper right corner, the third metal sheet 113 in the lower right corner, and the third metal sheet 113 in the lower left corner. The fourth metal sheet 114 and the fifth metal sheet 115 arranged in the middle position; the first metal sheet 111 and the third metal sheet 113 have the same structure and the two are arranged symmetrically about the center, the first metal sheet 111 adopts the method of cutting the rectangular metal sheet A metal sheet of a triangle 116 is used to etch the first metal via array 25; the third metal sheet 113 adopts the rectangular metal sheet to cut off the metal sheet of the second triangle 118 to etch the third metal via array 27; the second metal sheet 112 and the fourth metal sheet 114 have the same structure and they are arranged symmetrically about the center. The second metal sheet 112 adopts the method of adding the sixth metal sheet 117 to the upper right corner of the rectangular metal sheet to etch the second metal via array 26; the fourth metal sheet 114 Add the seventh metal sheet 119 to the lower left corner of the rectangular metal sheet to etch the fourth metal via array 28;

The first metal via 41 is etched on the left side of the fifth metal sheet 115, and the second metal via is etched at the same position on the left side of the second group of metal sheet units 12, the third group of metal sheet units 13, and the fourth group of metal sheet units 14. holes 42 , third metal vias 43 , and fourth metal vias 44 .

As a specific example, the structure of the second metal via array 26 and the first metal via array 25 are the same, and both are symmetrically arranged left and right; the third metal via array 27 and the first metal via array 25 have the same structure and the two Those are arranged symmetrically about the center, the fourth metal via array 28 and the first metal via array 25 have the same structure and both are arranged symmetrically up and down;

At the position corresponding to the first group of metal sheet units 11, the upper dielectric substrate 2 is surrounded by the first metal via array 25, the second metal via array 26, and the third metal via array in the first group of metal sheet units 11. 27. The fourth metal via array 28 and the first metal via 41 penetrate through to form the first group of metal vias 21;

Similarly, at positions corresponding to the second group of metal sheet units 12, the third group of metal sheet units 13, and the fourth group of metal sheet units 14, the second group of metal through holes 22, the third group of metal through holes 22, and the third group of metal sheet units are respectively formed on the upper dielectric substrate 2. A group of metal vias 23 and a fourth group of metal vias 24 .

As a specific example, the middle layer metal patch 3 tiles the entire upper surface of the lower dielectric substrate 4 and consists of four identical sets of through holes, namely the first set of through holes 31 located in the upper left corner and the upper right one. The second group of through holes 32 in the corner, the third group of through holes 33 in the lower right corner and the fourth group of through holes 34 in the lower left corner;

At the position corresponding to the first group of metal sheet units 11, the middle layer metal patch 3 is surrounded by the first metal via array 25, the second metal via array 26, and the third metal via array in the first group of metal sheet units 11. The hole array 27 and the fourth metal through hole array 28 penetrate through to form the first group of through holes 31; similarly, in the same way as the second group of metal sheet units 12, the third group of metal sheet units 13, and the fourth group of metal sheet units 14 Corresponding positions, the second group of through holes 32, the third group of through holes 33, and the fourth group of through holes 34 are respectively formed on the middle layer metal patch 3;

A circular through hole is respectively etched in the first group of through holes 31, the second group of through holes 32, the third group of through holes 33, and the fourth group of through holes 34, which are respectively the first circular through hole 35 and the second circular through hole. Shaped through hole 36, third circular through hole 37, fourth circular through hole 38; first to fourth circular through holes 35, 36, 37, 38 are arranged in the first to fourth metal through holes in one-to-one correspondence Below the orthographic projections of 41, 42, 43, and 44, the corresponding positions of the circular through holes and the center of the metal through holes are the same, and the radii of the first to fourth circular through holes 35, 36, 37, and 38 are larger than those of the first to fourth circular through holes. Four metal vias 41 , 42 , 43 , 44 .

As a specific example, the lower dielectric substrate 4 is penetrated by the first to fourth metal vias 41 , 42 , 43 , 44 for connecting the intermediate metal patch 3 and the lower layer metal patch 5 .

As a specific example, the lower metal patch 5 is a 1-to-4 power divider composed of microstrip lines, and the whole is composed of 7 parts, namely the eighth metal piece 51, the ninth metal piece 52, the tenth metal piece Sheet 53, eleventh metal sheet 54, twelfth metal sheet 55, thirteenth metal sheet 56 and fourteenth metal sheet 57;

The ninth metal sheet 52 and the tenth metal sheet 53 are bilaterally symmetrical and identical in structure, the third triangle 521 is etched in the upper right corner of the ninth metal sheet 52, and the fourth triangle 531 is etched in the upper left corner of the tenth metal sheet 53;

The eleventh metal sheet 54, the twelfth metal sheet 55, the thirteenth metal sheet 56 and the fourteenth metal sheet 57 are identical in structure, wherein the eleventh metal sheet 54 and the thirteenth metal sheet 56 are symmetrical up and down, The twelfth metal sheet 55 and the fourteenth metal sheet 57 are vertically symmetrical; the fifth triangle 541 is etched in the upper left corner of the eleventh metal sheet 54, the sixth triangle 542 is etched in the lower left corner, and the upper right corner is penetrated by the first metal through hole 41 The seventh triangle 551 is etched in the upper left corner of the twelfth metal sheet 55, the eighth triangle 552 is etched in the lower right corner, and the upper right corner is penetrated by the second metal through hole 42; the ninth triangle 562 is etched in the upper left corner of the thirteenth metal sheet 56 , the tenth triangle 561 is etched in the lower left corner, and the lower right corner is penetrated by the fourth metal via 44; the eleventh triangle 572 is etched in the upper right corner of the fourteenth metal sheet 57, the twelfth triangle 571 is etched in the lower left corner, and the lower right corner is The third metal via 43 penetrates through.

As a specific example, energy is input from the eighth metal sheet 51, transmitted to the eleventh to fourteenth metal sheets 54, 55, 56, 57 through the ninth metal sheet 52 and the tenth metal sheet 53, and then passes through the first ~ the fourth metal through holes 41, 42, 43, 44 pass through the first ~ fourth circular through holes 35, 36, 37, 38 to the first group ~ the fourth group of metal sheets 11, 12, 13, 14 For external radiation, the metal patch 3 on the middle layer is the common floor for the antenna and the power divider, and the feeder is located at the metal patch 5 on the lower layer.

As a specific implementation manner, the first metal sheet 111 and the third metal sheet 113 have a trapezoidal structure.

As a specific implementation manner, the twelfth metal sheet 55 and the fourteenth metal sheet 57 are respectively obtained by shifting the eleventh metal sheet 54 and the thirteenth metal sheet 56 to the right.

As a specific implementation, the thickness of the upper dielectric substrate 2 is 1.57 mm, the thickness of the lower dielectric substrate 4 is 0.254 mm, and the overall height of the antenna is 1.824 mm.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

1, the broadband high-gain circularly polarized antenna array of the present invention includes an upper layer metal patch 1, an upper layer dielectric substrate 2, an intermediate layer metal patch 3, a lower layer dielectric substrate 4, and a lower layer metal patch 5; the upper layer metal patch Sheet 1 is composed of four groups of metal sheet units 11, 12, 13, 14 with identical structures; taking the first group of metal sheet units 11 as an example, the first group of metal sheet units 11 is composed of 5 metal sheets, which are respectively arranged on The first metal piece 111 in the upper left corner, the second metal piece 112 in the upper right corner, the third metal piece 113 in the lower right corner, the fourth metal piece 114 in the lower left corner and the fifth metal piece 115 in the middle; the first metal piece The sheet 111 and the third metal sheet 113 have the same structure and they are arranged symmetrically about the center. The first metal sheet 111 adopts the metal sheet that cuts out the first triangle 116 from the rectangular metal sheet to etch the first metal via array 25; the third metal sheet Sheet 113 adopts the metal sheet that cuts out the second triangle 118 from the rectangular metal sheet, and etches the third metal through-hole array 27; the second metal sheet 112 and the fourth metal sheet 114 are identical and both are arranged symmetrically about the center, and the second metal sheet In 112, the sixth rectangular metal sheet 117 is added to the upper right corner of the rectangular metal sheet to etch the second metal through hole array 26; for the fourth metal sheet 114, the seventh rectangular metal sheet 119 is added to the lower left corner of the rectangular metal sheet, and the fourth rectangular metal sheet is etched. The metal via array 28 ; the first metal via 41 is etched on the left side of the fifth metal sheet 115 . The metal vias 41, 42, 43, 44 run through the dielectric substrate 2 and are used to connect the upper metal patch 1 and the middle metal patch 3; the middle metal patch 3 tiles the entire upper surface of the lower dielectric substrate 4, and etches four A circular through-hole 35,36,37,38, wherein the radius of the circular through-hole 35,36,37,38 is greater than the metal through-hole 41,42,43,44, the two centers of circle are the same; the metal through-hole 41,42 , 43, 44 run through the dielectric substrate 4, and are used to connect the middle layer metal patch 3 and the lower layer metal patch 5; , 53 are left and right symmetrical, and have the same structure. The upper right corner of the metal sheet 52 is etched with a triangle 521, and the upper left corner of the metal sheet 53 is etched with a triangle 531; the metal sheets 54, 55, 56, and 57 have the same structure, and the metal sheets 54, 56 are symmetrical , the metal sheets 55 and 57 are symmetrical up and down; the upper left corner of the metal sheet 54 is etched with a triangle 541, the lower left corner is etched with a triangle 542, the upper right corner is etched with a metal via 41, the metal sheet 55 is etched with a triangle 551 in the upper left corner, and the lower right corner is etched with a triangle 552, metal through hole 42 is etched in the upper right corner, triangle 562 is etched in the upper left corner of metal sheet 56, triangle 561 is etched in the lower left corner, metal through hole 44 is etched in the lower right corner, triangle 572 is etched in the upper right corner of metal sheet 57, and triangle 572 is etched in the lower left corner The triangle 571 is etched, and the metal via 43 is etched in the lower right corner.

The design process of the present invention is as follows:

(1) The upper dielectric substrate 2 has a thickness of 1.57 mm and a dielectric constant of 2.2, and the lower dielectric substrate 4 has a thickness of 0.254 mm and a dielectric constant of 2.2.

(2) The upper layer metal patch 1 realizes the circular polarization performance of the antenna by cutting the corners of the rectangular patch and adding a perturbation structure, and widens the axial ratio bandwidth, using metal through holes 41, 42, 43, 44 and circular The way of through holes 35, 36, 37, and 38 makes the antenna have broadband characteristics;

(3) the design of the one-point four-power divider formed by the lower layer metal patch 5 is made up of microstrip lines, by arranging four groups of identical metal sheets into a 2×2 structure, so that the designed antenna has high gain characteristics, and Make the radiation direction more concentrated.

1a-1g, the broadband high-gain circularly polarized antenna array of the present invention, the material of the dielectric substrate 2 is RogerRT5880, the dielectric constant ε _r =2.2, the thickness H1=1.57mm, and the size is 20mm×21.6mm×1.57mm , the material of the dielectric substrate 4 is Roger RT5880, the dielectric constant _εr =2.2, the thickness H2=0.254mm, and the size is 20.3mm×21.6mm×0.254mm; the metal through holes 41, 42, The diameters of 43 and 44 are 0.4mm, the diameters of the circular through holes 35, 36, 37, and 38 on the middle metal patch are 0.9mm, the length of the two right-angled sides of the first triangle 116 is 1.1mm×1.7mm, and the width of the rectangular metal sheet 117 is 1.1mm and the length is 0.2mm.

Fig. 2 is the _S11 curve diagram of the broadband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention, the working frequency band of the broadband high-gain circularly polarized antenna array is 32～48GHz, the absolute bandwidth is 16GHz, and the relative bandwidth is 40% , the antenna has a wide operating frequency band.

Fig. 3 is the axial ratio curve diagram of the broadband high-gain circularly polarized dipole antenna array of the present invention, the axial ratio frequency band of the broadband high-gain circularly polarized antenna array is 32～48GHz, the absolute axial ratio bandwidth is 16GHz, and the relative axial ratio Bandwidth is 40%.

Fig. 4 is a curve diagram of the gain of the wideband high-gain circularly polarized magnetoelectric dipole antenna array of the present invention as a function of frequency.

Fig. 5 and Fig. 6 are the radiation pattern of the wideband high-gain circularly polarized antenna array of the present invention at 40 GHz. The pattern of the wideband high-gain circularly polarized antenna array is stable and the cross-polarization level is low.

In summary, the broadband high-gain circularly polarized antenna array of the present invention has a stable pattern, low cross-polarization level, simple structure, and easy processing and realization.

Claims (8)

1. The utility model provides a broadband high-gain circular polarization magnetic dipole antenna array, its characterized in that includes upper metal paster (1), upper dielectric substrate (2), intermediate level metal paster (3), lower dielectric substrate (4), lower floor metal paster (5) that set up from top to bottom, wherein:

the upper metal patch (1) consists of four groups of metal sheet units with identical structures, each group of metal sheet units consists of 5 metal sheets, and circular polarization characteristics are realized by adopting structures of rectangular metal sheet corner cutting and rectangular perturbation addition; simultaneously, each group of metal sheet units is provided with a plurality of metal through holes penetrating through the upper medium substrate (2) and connecting the upper metal patch (1) and the middle metal patch (3);

the middle layer metal patch (3) is tiled on the upper surface of the whole lower layer dielectric substrate (4) and is etched with four circular through holes; the lower layer dielectric substrate (4) is penetrated by four metal through holes and is connected with the middle layer metal patch (3) and the lower layer metal patch (5);

the lower metal patch (5) adopts a microstrip line to form a quarter-power divider;

the upper layer metal patch (1) consists of 4 groups of metal sheet units with identical structures, and the metal sheet units are arranged in a 2 multiplied by 2 array, namely a first group of metal sheet units (11) arranged at the left upper corner, a second group of metal sheet units (12) arranged at the right upper corner, a third group of metal sheet units (13) arranged at the right lower corner and a fourth group of metal sheet units (14) arranged at the left lower corner;

the first group of metal sheet units (11) consists of 5 metal sheets, namely a first metal sheet (111) arranged at the upper left corner, a second metal sheet (112) arranged at the upper right corner, a third metal sheet (113) arranged at the lower right corner, a fourth metal sheet (114) arranged at the lower left corner and a fifth metal sheet (115) arranged at the middle position; the first metal sheet (111) and the third metal sheet (113) have the same structure and are symmetrically arranged about the center, the first metal sheet (111) is a rectangular metal sheet obtained by cutting off a first triangle (116), and a first metal through hole array (25) is etched; the third metal sheet (113) is formed by cutting off a rectangular metal sheet into a metal sheet with a second triangle (118), and etching a third metal through hole array (27); the second metal sheet (112) and the fourth metal sheet (114) have the same structure and are symmetrically arranged about the center, the second metal sheet (112) is formed by adding a sixth metal sheet (117) to the right upper corner of a rectangular metal sheet, and a second metal through hole array (26) is etched; a seventh metal sheet (119) is added to the left lower corner of the rectangular metal sheet (114), and a fourth metal through hole array (28) is etched;

the left side of the fifth metal sheet (115) is etched with a first metal through hole (41), and the left sides of the second group of metal sheet units (12), the third group of metal sheet units (13) and the fourth group of metal sheet units (14) are etched with a second metal through hole (42), a third metal through hole (43) and a fourth metal through hole (44) respectively at the same positions;

the lower metal patch (5) is a 1-to-4 power divider composed of microstrip lines, and the whole is composed of 7 parts, namely an eighth metal sheet (51), a ninth metal sheet (52), a tenth metal sheet (53), an eleventh metal sheet (54), a twelfth metal sheet (55), a thirteenth metal sheet (56) and a fourteenth metal sheet (57);

the ninth metal sheet (52) and the tenth metal sheet (53) are bilaterally symmetrical and have the same structure, the upper right corner of the ninth metal sheet (52) is etched with a third triangle (521), and the upper left corner of the tenth metal sheet (53) is etched with a fourth triangle (531);

the eleventh metal sheet (54), the twelfth metal sheet (55), the thirteenth metal sheet (56) and the fourteenth metal sheet (57) have the same structure, wherein the eleventh metal sheet (54) and the thirteenth metal sheet (56) are vertically symmetrical, and the twelfth metal sheet (55) and the fourteenth metal sheet (57) are vertically symmetrical; the eleventh metal sheet (54) has an upper left corner etched with a fifth triangle (541), a lower left corner etched with a sixth triangle (542), and an upper right corner penetrated by the first metal via (41); a seventh triangle (551) is etched in the left upper corner of the twelfth metal sheet (55), an eighth triangle (552) is etched in the right lower corner, and the right upper corner is penetrated by the second metal through hole (42); the thirteenth metal sheet (56) has a ninth triangle (562) etched in the upper left corner and a thirteenth triangle (561) etched in the lower left corner, the lower right corner being penetrated by the fourth metal via (44); the fourteenth metal sheet (57) has an eleventh triangle (572) etched in the upper right corner and a twelfth triangle (571) etched in the lower left corner, the lower right corner being penetrated by the third metal via (43).

2. The broadband high-gain circularly polarized magnetic dipole antenna array according to claim 1, wherein the second metal via array (26) and the first metal via array (25) have the same structure and are symmetrically arranged according to the left-right direction, the third metal via array (27) and the first metal via array (25) have the same structure and are symmetrically arranged about the center, and the fourth metal via array (28) and the first metal via array (25) have the same structure and are symmetrically arranged according to the up-down direction;

the upper dielectric substrate (2) is penetrated by a first metal through hole array (25), a second metal through hole array (26), a third metal through hole array (27), a fourth metal through hole array (28) and a first metal through hole (41) in the first group of metal sheet units (11) at positions corresponding to the first group of metal sheet units (11) to form a first group of metal through holes (21);

similarly, a second group of metal through holes (22), a third group of metal through holes (23) and a fourth group of metal through holes (24) are respectively formed on the upper dielectric substrate (2) at positions corresponding to the second group of metal sheet units (12), the third group of metal sheet units (13) and the fourth group of metal sheet units (14).

3. The broadband high-gain circularly polarized magnetic dipole antenna array according to claim 2, wherein the middle layer metal patch (3) is tiled on the upper surface of the whole lower layer dielectric substrate (4) and consists of 4 groups of completely identical through holes, namely a first group of through holes (31) arranged at the left upper corner, a second group of through holes (32) arranged at the right upper corner, a third group of through holes (33) arranged at the right lower corner and a fourth group of through holes (34) arranged at the left lower corner;

the middle layer metal patch (3) is penetrated by a first metal through hole array (25), a second metal through hole array (26), a third metal through hole array (27) and a fourth metal through hole array (28) in the first group metal sheet unit (11) at a position corresponding to the first group metal sheet unit (11) to form a first group of through holes (31); similarly, a second group of through holes (32), a third group of through holes (33) and a fourth group of through holes (34) are respectively formed on the middle layer metal patch (3) at positions corresponding to the second group of metal sheet units (12), the third group of metal sheet units (13) and the fourth group of metal sheet units (14);

a circular through hole is etched in the first group of through holes (31), the second group of through holes (32), the third group of through holes (33) and the fourth group of through holes (34) respectively, and the circular through holes are respectively a first circular through hole (35), a second circular through hole (36), a third circular through hole (37) and a fourth circular through hole (38); the first through fourth circular through holes (35, 36, 37, 38) are arranged below orthographic projections of the first through fourth metal through holes (41, 42, 43, 44) in a one-to-one correspondence mode, the circle center positions of the corresponding circular through holes and the metal through holes are the same, and the radius of the first through fourth circular through holes (35, 36, 37, 38) is larger than that of the first through fourth metal through holes (41, 42, 43, 44).

4. A broadband high-gain circularly polarized magneto-electric dipole antenna array according to claim 3, wherein the lower dielectric substrate (4) is penetrated by first to fourth metal vias (41, 42, 43, 44) for connecting the middle layer metal patch (3) and the lower layer metal patch (5).

5. The broadband high-gain circularly polarized magnetic dipole antenna array according to claim 4, wherein energy is inputted from an eighth metal sheet (51), transmitted to eleventh to fourteenth metal sheets (54, 55, 56, 57) through a ninth metal sheet (52) and a tenth metal sheet (53), and then transmitted to the first to fourth groups of metal sheets (11, 12, 13, 14) through first to fourth circular through holes (35, 36, 37, 38) through first to fourth metal through holes (41, 42, 43, 44), radiated outwards, the middle layer metal patch (3) being a common floor of an antenna and a power divider, and the feeder line being located at the lower layer metal patch (5).

6. The broadband high-gain circularly polarized magneto-electric dipole antenna array according to claim 4, wherein said first metal sheet (111) and said third metal sheet (113) are of a trapezoidal structure.

7. The broadband high-gain circularly polarized magnetic dipole antenna array according to claim 4, wherein the twelfth metal sheet (55) and the fourteenth metal sheet (57) are respectively obtained by shifting the eleventh metal sheet (54) and the thirteenth metal sheet (56) rightward.

8. The broadband high-gain circularly polarized magnetic dipole antenna array according to any one of claims 1-7, wherein the thickness of the upper dielectric substrate (2) is 1.57mm, the thickness of the lower dielectric substrate (4) is 0.254mm, and the overall height of the antenna is 1.824mm.