CN119297589A - A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit - Google Patents
A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit Download PDFInfo
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Abstract
本发明公开了一种毫米波紧耦合宽带宽扫描角度相控阵天线单元，包括由上至下依序设置的三层覆盖层、辐射贴片天线、第一介质板、馈电贴片、寄生贴片、第二介质板、寄生馈电耦合贴片、馈电端口和金属地板。三层覆盖层包括第一覆盖层、第二覆盖层、第三覆盖层。第一覆盖层的上表面设置有多个间隔均匀的开口圆形金属贴片，第二覆盖层的两侧裁剪，形成一个形状为“工”字型的覆盖层，第三覆盖层为中心裁剪，形成一个形状为“口”字型的覆盖层。贴片天线设置在第一介质板的上表面，馈电贴片设置在第二介质板的上表面，金属地板设置在第二介质板的下表面。本发明一种毫米波紧耦合宽带宽扫描角度相控阵天线单元通过简单的同轴馈电探针将能量从馈电贴片容性耦合至辐射贴片天线，展宽了其工作带宽，通过加载三层不同的覆盖层实现其大角度扫描特性，可服务于5G毫米波通信。
The present invention discloses a millimeter-wave tightly coupled wide bandwidth scanning angle phased array antenna unit, comprising three covering layers, a radiating patch antenna, a first dielectric plate, a feeding patch, a parasitic patch, a second dielectric plate, a parasitic feeding coupling patch, a feeding port and a metal floor arranged in sequence from top to bottom. The three covering layers include a first covering layer, a second covering layer and a third covering layer. A plurality of evenly spaced open circular metal patches are arranged on the upper surface of the first covering layer, the two sides of the second covering layer are cut to form a covering layer in the shape of an "I" character, and the third covering layer is cut in the center to form a covering layer in the shape of a "mouth" character. The patch antenna is arranged on the upper surface of the first dielectric plate, the feeding patch is arranged on the upper surface of the second dielectric plate, and the metal floor is arranged on the lower surface of the second dielectric plate. A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit of the present invention capacitively couples energy from a feeding patch to a radiating patch antenna through a simple coaxial feeding probe, thereby broadening its operating bandwidth, and realizing its large-angle scanning characteristics by loading three different covering layers, which can serve 5G millimeter-wave communications.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna unit.
Background
At present, with the rapid development of wireless communication technology, especially the continuous promotion of fields such as mobile communication, satellite communication, radar communication, etc., the demand for high-performance and high-reliability antenna systems is significantly increased. The wireless communication needs the antenna to have wider frequency band characteristics so as to adapt to signal transmission of various different frequency bands, needs the antenna to have high gain and directivity so as to realize longer transmission distance and higher transmission rate, and needs the antenna to be capable of scanning at a large angle so as to realize larger coverage area. Compared with the traditional antenna system, the phased array antenna has the advantages and characteristics of strong directivity, high scanning speed, strong anti-interference performance, high precision, strong flexibility and the like, and therefore has wide application prospect in a plurality of application fields. However, the conventional phased array antenna system has the problems of mutually independent antenna elements, low modularization degree, large mutual interference among the antenna elements and the like, and cannot meet the requirements of high performance and high reliability. Therefore, researches on tightly coupled phased array antennas have been made, and the main idea is to improve the accuracy and performance of the antenna array by making the coupling manner between the antenna elements more compact. Compared with the traditional phased array antenna, the tightly coupled phased array antenna units are closer in coupling mode, and the mutual influence of the antenna units is larger, so that the influence of the phase and amplitude adjustment of the antenna units on the radiation direction is more obvious, and higher precision and accuracy are realized. The method utilizes the idea of coupling between units, avoids complex decoupling technology, improves the antenna performance and reduces the design difficulty. In addition, the space between the tightly coupled phased array antennas is smaller, so that the grating lobe problem during large-angle scanning is avoided, the caliber of the antenna array surface is reduced, the manufacturing cost is lower, the size is smaller, and the installation and maintenance are facilitated.
Millimeter wave communication is a key push technology for 5G application nowadays by virtue of the abundant spectrum. Millimeter wave bands have extremely wide bandwidths which are 10 times of the total bandwidths of the frequency bands below microwaves, frequency resources are increasingly tensioned nowadays, and millimeter wave communication is attractive. Second, millimeter wave antenna arrays have narrower radiation beams that perform better in resolution, i.e., in resolving objects that are close in distance. Besides, millimeter wave communication has higher signal transmission quality, on one hand, because the interference sources of the high frequency band are few, the millimeter wave channel is very stable and reliable and is equivalent to the transmission quality of an optical cable, on the other hand, communication signals can be blocked to a certain extent in the free space transmission process, such as sand dust and smoke, signals of the common frequency band can be seriously influenced to cause interruption, but signals of the millimeter wave band can penetrate through substances, and the signal quality is kept good and is free from attenuation. The frequency is inversely proportional to the wavelength, so that the wavelength in the millimeter wave band will be much smaller than the wavelength in the microwave band, and the size of the electronic device is proportional to the wavelength, that is, the electronic device operating in the millimeter wave band will have a small physical volume, thereby achieving miniaturization. Based on the above advantages of millimeter wave communication, in recent years, with the increasing amount of mobile communication traffic, the millimeter wave band has become a hot spot for the fifth generation (5G) mobile communication.
It can be seen that millimeter wave tightly coupled wide bandwidth scanning angle phased array antennas will be a research hotspot in the future communications era and future mobile architecture.
Disclosure of Invention
The invention aims to provide a millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna unit, which can integrate millimeter wave frequency bands, broadband, low profile and beam scanning characteristics into a pair of antennas and aims to meet the requirements of future wireless communication on high speed, low time delay, large coverage, beam switching and the like.
The invention adopts the following technical scheme:
the millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna unit comprises a cover layer, a first dielectric plate 7, a second dielectric plate 2 and a metal floor 1, wherein the cover layer, the first dielectric plate 7, the second dielectric plate 2 and the metal floor 1 are arranged in sequence from top to bottom, and the cover layer, the first dielectric plate and the second dielectric plate are used for increasing the scanning angle, and the metal floor 1 is used for restraining back radiation;
The upper surface of the first dielectric plate 7 is also provided with a group of radiation patches for radiating electromagnetic waves, and the single radiation patches 8 have the same size and structure and are symmetrically arranged at left and right intervals;
a parasitic patch 3 and a feeding patch 6 for enhancing the capacitive coupling between the units are arranged above the second dielectric plate 2;
A coaxial feed probe, two groups of metal posts 13 for moving out of the working frequency band and matching abnormal resonance points, and a parasitic feed coupling patch 5 and two groups of semi-cylindrical metal posts which are helpful for transmitting energy to the feed patch 6 through the coaxial feed probe are arranged between the second dielectric plate 2 and the metal floor 1.
The covering layers comprise a first covering layer 11, a second covering layer 10 and a third covering layer 9 which are sequentially arranged from top to bottom;
The first covering layer 11 comprises a dielectric plate with arc shapes cut at four corners and an open annular metal patch 12, the open annular metal patch 12 is uniformly arranged on the upper surface of the dielectric plate with arc shapes cut at four corners in a 4*4 arrangement mode, the second covering layer 10 adopts a covering layer with an I shape, and the third covering layer 9 adopts a covering layer with a mouth shape.
The open annular metal patch 12 is composed of a circular metal patch 1201, a circular slit 1202 and a square slit 1203, wherein the radius of the circular metal patch 1201 is 0.225mm, the radius of the circular slit 1202 is 0.1125mm, and the opening width of the square slit 1203 is 0.15mm.
The single radiation patch 8 is provided with round holes for impedance matching, four edge corners of the single radiation patch 8 are provided with chamfer angles, two chamfer angles on one side which are adjacently arranged between the single radiation patch 8 are straight chamfer angles, the edge forming the straight chamfer angle extends outwards to form an arc-shaped branch, the tail end of the arc-shaped branch is close to the round hole side, and two chamfer angles on the other side which are not adjacently arranged between the single radiation patch 8 are arc chamfer angles.
The feeding patch 6 comprises a first circular feeding patch 601, a second circular feeding patch 602 and a strip feeding patch 603, wherein the first circular feeding patch 601 is located at the left end of the strip feeding patch 603, the second circular feeding patch 602 is located at the right end of the strip feeding patch 603, the radius of each of the first circular feeding patch 601 and the second circular feeding patch 602 is 0.175mm, the length of the strip feeding patch 603 is 0.9mm, and the width of the strip feeding patch is 0.08mm.
The parasitic patch 3 includes a first stripe-shaped parasitic patch 301 and a second stripe-shaped parasitic patch 302, and the first stripe-shaped parasitic patch 301 and the second stripe-shaped parasitic patch 302 are respectively located at left and right edges of the second dielectric plate.
The two sets of metal columns 13 are composed of a first metal column 1301, a second metal column 1302, a third metal column 1303, a fourth metal column 1304, a fifth metal column 1305, a sixth metal column 1306, a seventh metal column 1307, an eighth metal column 1308, a ninth metal column 1309 and a tenth metal column 1310, and the radii of the two sets of metal columns are the same, the coaxial feed probe 1311 is surrounded by the first metal column 1301, the second metal column 1302, the third metal column 1303, the fourth metal column 1304 and the fifth metal column 1305, the distance between the first metal column 1301, the second metal column 1302, the third metal column 1303, the fourth metal column 1304 and the fifth metal column 1305 and the coaxial feed probe 1311 should be kept at 0.45 mm-0.55 mm, the eleventh metal column 1312 and the coaxial feed probe 1311 are symmetrical about the center of the second medium plate 2, and the eleventh metal column 1312 is surrounded by the sixth metal column 1306, the seventh metal column 7, the eighth metal column 1308, the ninth metal column 1310, the tenth metal column 1303, the tenth metal column 1304 and the fifth metal column 1305 are symmetrical about the center of the second metal column 1309, the fourth metal column 1301301 and the fifth metal column 1305.
The two groups of semicircular metal posts are respectively positioned at the left side and the right side between the second dielectric plate 2 and the metal floor, the semicircular metal posts positioned at the left side are marked as a first semicircular metal post 1313, a second semicircular metal post 1314, a third semicircular metal post 1315 and a fourth semicircular metal post 1316, the semicircular metal posts positioned at the right side are marked as a fifth semicircular metal post 1317, a sixth semicircular metal post 1318, a seventh semicircular metal post 1319 and an eighth semicircular metal post 1320, the upper ends of the semicircular metal posts are respectively connected with the first strip-shaped parasitic patch 301 and the second strip-shaped parasitic patch 302, and the lower ends of the semicircular metal posts are connected with the metal floor.
The parasitic-feed coupling patch 5 comprises a first rectangular parasitic-feed coupling patch 501, a second rectangular parasitic-feed coupling patch 502 and a first circular parasitic-feed coupling patch 503, wherein the first rectangular parasitic-feed coupling patch 501 is electrically connected with the third metal column 1303 and is horizontally arranged at the position 0.25mm above the metal floor 1, the second rectangular parasitic-feed coupling patch 502 is electrically connected with the coaxial feed probe 1311 and is horizontally arranged at the position 0.125mm above the metal floor 1, the first circular parasitic-feed coupling patch 503 is sleeved on the eleventh metal column 1312 and is electrically connected with the eleventh metal column, the first circular parasitic-feed coupling patch 503 is positioned at the position 0.0813mm below the second circular feed patch 602, and the radii of the first circular parasitic-feed coupling patch 503 and the second circular feed patch 602 are the same.
The length of the first rectangular parasitic feeding coupling patch 501 is 0.325mm, the width is 0.2mm, and the length of the second rectangular parasitic feeding coupling patch 502 is 0.225mm, and the width is 0.2mm.
According to the invention, 5 metal posts with the same radius are introduced near the feeding coaxial and distributed near the feeding coaxial in a semi-surrounding manner, so that electromagnetic radiation of the feeding coaxial can be effectively blocked, and in order to keep the symmetry of a far-field radiation pattern of the antenna, another group of 5 metal posts with the same radius are arranged at the symmetrical position, and the electromagnetic simulation software is utilized to simulate and compare, so that the frequency points (also called blind areas) with abnormal return loss in an operating frequency band can be effectively removed by introducing the two groups of posts, thereby improving the operating performance of the antenna.
Further, in order to make the antenna scan at a large angle in both the E-plane and the H-plane, it is necessary to suppress the surface wave transmitted in the antenna medium as much as possible. Therefore, three layers of covering layers are designed, namely, a periodically arranged opening circular ring-shaped metal patch covering layer, a medium covering layer with an I shape and a medium covering layer with a mouth shape are sequentially arranged from top to bottom. The air layer is added by carrying out opening operation on the dielectric cover layer, so that the relative dielectric constant of the dielectric plate is reduced, and the frequency point that impedance matching is abnormal in the working frequency band is avoided when the antenna is scanned at a large angle. Finally, the invention utilizes the capacitive coupling mode to feed the dipole antenna, and can offset the inductance introduced by adopting coaxial feed, thereby expanding the working bandwidth of the antenna.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the layered structure of the present invention.
FIG. 2 is a schematic view of a first cover layer structure according to the present invention;
FIG. 3 is a schematic view of a second cover layer structure according to the present invention;
FIG. 4 is a schematic view of a third cover layer structure according to the present invention;
fig. 5 is a schematic diagram of a patch antenna according to the present invention;
FIG. 6 is a schematic diagram of a feed patch and parasitic patch configuration in accordance with the present invention;
FIG. 7 is a schematic diagram of a second dielectric plate, metal posts, and parasitic feed coupling patch according to the present invention;
FIG. 8 is a front view of a second dielectric plate according to the present invention (with metal posts disposed in the second dielectric plate removed);
FIG. 9 is a diagram of the voltage standing wave ratio versus frequency simulation result of the present invention;
FIG. 10 is a diagram showing the simulation result of voltage standing wave ratio-frequency when the E plane is swept by 0 DEG, 45 DEG and 70 DEG in the embodiment of the invention;
FIG. 11 is a diagram showing the simulation result of voltage standing wave ratio-frequency when the E plane is swept by 0 DEG, 45 DEG and 60 DEG in the embodiment of the invention;
FIG. 12 is a graph of gain versus frequency simulation results in an embodiment of the present invention;
fig. 13 is a far field radiation pattern for an embodiment of the present invention at 17 GHz where phi=0°;
fig. 14 is a far field radiation pattern for an embodiment of the present invention at 17 GHz where phi=90°;
fig. 15 is a far field radiation pattern for an embodiment of the present invention at 35 GHz where phi=0°;
Fig. 16 is a far field radiation pattern for an embodiment of the present invention at 35 GHz where phi=90°;
fig. 17 is a far field radiation pattern for an embodiment of the present invention at 55 GHz where phi=0°;
Fig. 18 is a far field radiation pattern for an embodiment of the present invention at 55 GHz where phi=90°.
The illustration is 1, metal floor; 2, a second dielectric plate; 3, parasitic patches; 301, first stripe parasitic patch, 302, second stripe parasitic patch, 4, feed port, 5, parasitic feed coupling patch, 501, first stripe parasitic feed coupling patch, 502, second stripe parasitic feed coupling patch, 503, third circular parasitic feed coupling patch, 6, feed patch, 601, first circular feed patch, 602, second circular feed patch, 603, stripe parasitic feed patch, 7, first dielectric plate, 8, radiation patch, 801, first cut angle, 802, second cut angle, 803, third cut angle, 804, fourth cut angle, 805, fifth cut angle, 806, sixth cut angle, 807, seventh cut angle, 808, eighth cut angle, 809, first arc-shaped branch, 810, second arc-shaped branch, 811, third arc-shaped branch, 812, fourth arc-shaped branch, 813, first circular hole, 814, second circular hole, 9, third cover layer, 901, square gap, 10, second cover layer, 1001, first rectangular dielectric plate, 1002, 1003, second rectangular dielectric plate, 1002, third cut angle, 806, sixth cut angle, 806, second cut angle, 807, second cut angle, second arc-shaped branch, round, cylindrical, fourth, fifth, 1317, 1318, sixth, 1319, seventh, 1320, eighth, 14, metallized, 1401, first, 1402, second, 1403, third, 1404, fourth, 1405, fifth, 1406, sixth, 1407, seventh, 1408, eighth, 1409, ninth, 1410, tenth, 1411, eleventh, 1412, twelfth, 1413, first, 1414, second, 1415, third, 1416, fourth, 1417, fifth, 1418, sixth, 1419, seventh, 1420, eighth.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 8, fig. 1 is a schematic diagram of a layered structure of a millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna unit according to the present invention, which includes a cover layer, a first dielectric plate 7, a second dielectric plate 2 and a metal floor 1, wherein the cover layer, the first dielectric plate 7, the second dielectric plate 2 and the metal floor 1 are sequentially arranged from top to bottom, the cover layer, the first dielectric plate 7, the second dielectric plate 2 and the metal floor 1 are used for inhibiting back radiation, and the cover layer is used for increasing a scanning angle;
The upper surface of the first dielectric plate 7 is also provided with a radiation patch 8 for radiating electromagnetic waves,
A parasitic patch 3 and a feeding patch 6 for enhancing the capacitive coupling between the units are arranged above the second dielectric plate 2;
A coaxial feed probe, two groups of metal posts 13 for moving out of the working frequency band and matching abnormal resonance points, and a parasitic feed coupling patch 5 and two groups of semi-cylindrical metal posts which are helpful for transmitting energy to the feed patch 6 through the coaxial feed probe are arranged between the second dielectric plate 2 and the metal floor 1.
The cover layer comprises a first cover layer 11, a second cover layer 10 and a third cover layer 9 which are sequentially arranged from top to bottom. The first cover layer 11 comprises a dielectric plate with a square cutting arc shape and an open annular metal patch 12, the open annular metal patch 12 is uniformly arranged on the upper surface of the dielectric plate with the square cutting arc shape in a 4×4 arrangement mode, the second cover layer 10 is cut into a cover layer with an I shape, the third cover layer 9 is cut into a cover layer with a mouth shape, and all layers of the three cover layers are tightly stacked together, so that an air layer can be added into the dielectric layer, the dielectric constant of the dielectric plate is reduced, surface waves are restrained, and the scanning angle of the phased array antenna is widened. The open annular metal patch 12 is composed of a circular metal patch 1201, a circular slit 1202 and a square slit 1203, wherein the radius of the circular metal patch 1201 is 0.225mm, the radius of the circular slit 1202 is 0.1125mm, and the opening width of the square slit 1203 is 0.15mm. In practical use, the open circular metal patches 12 are printed on the upper surface of the first cover layer 11 and distributed in a 4×4 matrix, the patch antennas 8 are printed on the upper surface of the first dielectric plate 7, the feeding patches 6 and the parasitic coupling patches 3 are printed on the upper surface of the second dielectric plate 2, the metal floor 1 is printed on the lower surface of the second dielectric plate 2, the first dielectric plate 7 can be a plate with a thickness of 0.0813 mm and a dielectric constant of 3, the second dielectric plate 2 can be a plate with a thickness of 1.0813 mm and a dielectric constant of 3, the first cover layer 11 can be a plate with a thickness of 0.1mm and a dielectric constant of 3.5, the second cover layer 10 can be a plate with a thickness of 0.3mm and a dielectric constant of 2.6, and the third cover layer 9 can be a plate with a thickness of 0.15 and a dielectric constant of mm and a dielectric constant of 3. Specifically, in this embodiment, the four corners of the first cover layer 11 are cut into arc-shaped cut corners 1101, and the radius of the arc-shaped cut corners 1101 is 0.2mm.
Specifically, in this embodiment, the second cover layer 10 is formed by a first rectangular dielectric plate 1001, a second rectangular dielectric plate 1002, and a third rectangular dielectric plate 1003, so as to form a cover layer with an "h" shape.
Specifically, in this embodiment, the third cover layer 9 is cut at the center, and the cut portion is a square slit 901, so as to form a cover layer in the shape of a "mouth", and the length of the square slit 901 is 3mm.
Since the radiation patches in each group are the same in structure size, in connection with the accompanying drawings, the structure of the radiation patch 8 is further explained and illustrated, the edges of the radiation patch are provided with cut angles, the cut angles are respectively a first cut angle 801, a second cut angle 802, a third cut angle 803, a fourth cut angle 804, a fifth cut angle 805, a sixth cut angle 806, a seventh cut angle 807 and an eighth cut angle 808, and the edges of the fifth cut angle 805, the sixth cut angle 806, the seventh cut angle 807 and the eighth cut angle 808 respectively extend outwards to form a first arc-shaped branch 809, a second arc-shaped branch 810, a third arc-shaped branch 811 and a fourth arc-shaped branch 812, and the radiation patch 8 is provided with a first round hole 813 and a second round hole 814.
The feeding patch 6 comprises a first circular feeding patch 601, a second circular feeding patch 602 and a strip feeding patch 603, wherein the first circular feeding patch 601 is located at the left end of the strip feeding patch 603, the second circular feeding patch 602 is located at the right end of the strip feeding patch 603, the radius of each of the first circular feeding patch 601 and the second circular feeding patch 602 is 0.175mm, the length of the strip feeding patch 603 is 0.9mm, and the width of the strip feeding patch is 0.08mm.
The parasitic patch 3 includes a first stripe-shaped parasitic patch 301 and a second stripe-shaped parasitic patch 302, and the first stripe-shaped parasitic patch 301 and the second stripe-shaped parasitic patch 302 are respectively located at left and right edges of the second dielectric plate.
The two sets of metal columns 13 are composed of a first metal column 1301, a second metal column 1302, a third metal column 1303, a fourth metal column 1304, a fifth metal column 1305, a sixth metal column 1306, a seventh metal column 1307, an eighth metal column 1308, a ninth metal column 1309 and a tenth metal column 1310, which have the same radius, the coaxial feed probe 1311 is surrounded by the first metal column 1301, the second metal column 1302, the third metal column 1303, the fourth metal column 1304 and the fifth metal column 1305, the distance between the first metal column 1301, the second metal column 1302, the third metal column 1303, the fourth metal column 1304 and the fifth metal column 1305 and the coaxial feed probe 1311 should be kept between 0.45 mm and 0.55 mm, the eleventh metal column 1312 and the coaxial feed probe 1311 are symmetrical about the center of the second dielectric plate 2, and the eleventh metal column 1312 is surrounded by the sixth metal column 1306, the seventh metal column 1307, the eighth metal column 1308, the ninth metal column 1309 and the tenth metal column 1305. Specifically, in the present embodiment, the first metal pillar 1301, the second metal pillar 1302, the third metal pillar 1303, the fourth metal pillar 1304, and the fifth metal pillar 1305 are symmetrically distributed with respect to the sixth metal pillar 1306, the seventh metal pillar 1307, the eighth metal pillar 1308, the ninth metal pillar 1309, and the tenth metal pillar 1310, respectively, and have the same radius, the coaxial feed probe 1311 is surrounded by the first metal pillar 1301, the second metal pillar 1302, the third metal pillar 1303, the fourth metal pillar 1304, and the fifth metal pillar 1305, the eleventh metal pillar 1312 and the coaxial feed probe 1311 are centrally symmetric with respect to the second dielectric plate 2, and the eleventh metal pillar 1312 is surrounded by the sixth metal pillar 1306, the seventh metal pillar 1307, the eighth metal pillar 1308, the ninth metal pillar 1309, and the tenth metal pillar 1310, and the first semicircular metal pillar 1313, the second semicircular pillar 1314, the third semicircular metal pillar 1315, and the fourth semicircular pillar 1316 are disposed on the left side of the second dielectric plate 2.
The two sets of semicircular metal posts are respectively located at the left and right sides of the second dielectric plate 2, the semicircular metal posts located at the left side are provided with a first semicircular metal post 1313, a second semicircular metal post 1314, a third semicircular metal post 1315 and a fourth semicircular metal post 1316, and the semicircular metal posts located at the right side are provided with a fifth semicircular metal post 1317, a sixth semicircular metal post 1318, a seventh semicircular metal post 1319 and an eighth semicircular metal post 1320, and since these edge metal posts are commonly used by two adjacent antenna units, a half metal post is displayed in each antenna unit.
The parasitic-feed coupling patch 5 includes a first rectangular parasitic-feed coupling patch 501, a second rectangular parasitic-feed coupling patch 502, and a first circular parasitic-feed coupling patch 503, where the first rectangular parasitic-feed coupling patch 501 is electrically connected to the third metal post 1303, and the second rectangular parasitic-feed coupling patch 502 is electrically connected to the coaxial feed probe 1311. The length of the first rectangular parasitic-feed coupling patch 501 is 0.325mm, the width is 0.2mm, the first rectangular parasitic-feed coupling patch is located at a position 0.25mm above the metal floor 1, the length of the second rectangular parasitic-feed coupling patch 502 is 0.225mm, the width is 0.2mm, the first rectangular parasitic-feed coupling patch 503 is located at a position 0.0813mm below the second circular feed patch 602, and the radii of the first circular parasitic-feed coupling patch 503 and the second circular feed patch 602 are the same.
In the present embodiment, in actual use, metal posts are provided in the second dielectric plate 2 for convenience, so that a hole opening operation is performed in the second dielectric plate 2, the first via 1401, the second via 1402, the third via 1403, the fourth via 1404, the fifth via 1405, the sixth via 1406, the seventh via 1407, the eighth via 1408, the ninth via 1409, and the tenth via 1410 are for facilitating insertion of the first metal pillar 1301, the second metal pillar 1302, the third metal pillar 1303, the fourth metal pillar 1304, the fifth metal pillar 1305, the sixth metal pillar 1306, the seventh metal pillar 1307, the eighth metal pillar 1308, the ninth metal pillar 1309, and the tenth metal pillar 1310, respectively, in the second dielectric plate 2, the eleventh through hole 1411 is for facilitating insertion of the coaxial feed probe 1311 in the second dielectric plate 2, the twelfth through hole 1412 is for facilitating insertion of the eleventh metal post 1312 in the second dielectric plate 2, and the first, second, third, fourth, fifth, sixth, seventh and eighth semicircular through holes 1413, 1415, 1416, 1417, 1418, 1419 and 1420 are for facilitating insertion of the first, second, third, fourth, seventh, 1316, 1317, 1318, 1319 and 1320 in the second dielectric plate 2.
Referring to fig. 9, fig. 9 shows a simulation result diagram of the relationship between the millimeter wave close-coupled wide bandwidth scanning angle phased array antenna and frequency based on the master-slave boundary condition, wherein the simulation result is obtained by performing simulation calculation on the voltage standing wave ratio of the antenna by using commercial simulation software ANSYS HFSS _19.2, and when the voltage standing wave ratio is smaller than 3 as a standard, as shown in fig. 9, the working frequency band which can be realized by the millimeter wave close-coupled wide bandwidth scanning angle phased array antenna is 17.32-54.75 ghz.
Referring to fig. 10 and 11, fig. 10 and 11 respectively show graphs of simulation results of the relationship between voltage standing wave ratio and frequency of the millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna based on the master-slave boundary condition under different scanning angles of an E plane and an H plane, wherein the antenna can scan to 70 degrees on the E plane and 60 degrees on the H plane, and the results are good.
Referring to fig. 12, fig. 12 shows a simulation result diagram of the relationship between the gain and the frequency of the millimeter wave tightly coupled wide bandwidth scanning angle phased array antenna based on the master-slave boundary condition, and as shown in fig. 12, the maximum gain obtained by the antenna is 4.35 dB, and the gain is kept stable in a wider operating band.
Referring to fig. 13 to 18, fig. 13 to 18 show far-field radiation patterns of millimeter wave tightly-coupled wide-bandwidth scanning angle phased array antenna units when phi=0° and phi=90° are respectively at three frequency points of 17 GHz, 35 GHz and 55 GHz, the maximum radiation directions of the antennas are all +z axes, no deviation phenomenon and split phenomenon occur, and the cross polarization level is basically lower than that of the main polarization by at least 40 dB.
The simulation results show that the antenna provided by the invention realizes lower section, wider working bandwidth, wider angle scanning and lower cross polarization level.
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
It should be noted that the terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
Note that the above is only a preferred embodiment of the present invention and uses technical principles. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the present invention has been described in connection with the above embodiments, it is to be understood that the invention is not limited to the specific embodiments disclosed and that many other and equally effective embodiments may be devised without departing from the spirit of the invention, and the scope thereof is determined by the scope of the appended claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411541229.6A CN119297589A (en) | 2024-10-31 | 2024-10-31 | A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411541229.6A CN119297589A (en) | 2024-10-31 | 2024-10-31 | A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit |
Publications (1)
| Publication Number | Publication Date |
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| CN119297589A true CN119297589A (en) | 2025-01-10 |
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|---|---|---|---|
| CN202411541229.6A Pending CN119297589A (en) | 2024-10-31 | 2024-10-31 | A millimeter-wave tightly coupled wide-bandwidth scanning angle phased array antenna unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN119297589A (en) |
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2024
- 2024-10-31 CN CN202411541229.6A patent/CN119297589A/en active Pending
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