Single-layer four-polarization one-dimensional phased-array antenna with high polarization purity

Abstract

The invention belongs to the technical field of antennas. The invention provides a single-layer four-polarization one-dimensional phased array antenna with high polarization purity. According to the embodiment of the invention, the single-layer RO3006 dielectric plate is used, the antenna linear array and the power division network are printed on the upper surface of the dielectric plate, the metal floor is printed on the lower surface of the dielectric plate, and the structure is simple. Each 1 * 8 linear array is fed in series through two one-to-eight power division networks, energy is coupled to a square radiation patch through a T-like structure, and finally, an 8 * 8 antenna array is formed through the 1 * 8 linear arrays which are arranged in a staggered mode. The antenna array can realize four polarization modes, each polarization mode can realize beam scanning with a pitch angle of + / -30 degrees on a yoz surface, and main lobe beam pointing in a series feed array direction is kept constant in a wide frequency range and is not influenced by working frequency change. And the control and flexibility of the beam are improved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of antennas, and in particular, to a single-layer four-polarization one-dimensional phased array antenna with high polarization purity. Background Art

[0002] In the target search tasks of radars and aircraft-mounted antennas, quickly changing the main beam direction and having a wide beam coverage range have become crucial requirements, which pose more stringent standards for the scanning angle setting of antennas. Phased array antennas stand out due to their unique technical advantages. They adjust the phase of each antenna element electronically to precisely adjust the direction and gain of the beam. Furthermore, phased array antennas have excellent dynamic pointing performance and can instantaneously adjust the beam pointing according to actual needs, easily achieving a wider coverage area. Their high anti-interference ability, high reliability, and high flexibility all lay a solid foundation for their excellent performance in complex electromagnetic environments. However, despite the many advantages of phased array antennas, they still face many challenges such as design difficulties and structural complexity in realizing multiple polarization modes and maintaining the beam pointing unaffected by frequency changes, and there are relatively few existing research results.

[0003] Current domestic and foreign research on multi-polarization phased array antennas, for example, Youlong He, Hongcan Liang et al. used the slot antenna principle in the journal "Design of Wideband Bandwidth Scanning Angle Multi-Polarization Phased Array Antenna" to fabricate an antenna whose scanning characteristics in 6 polarization states can meet the airspace coverage of ±45° in the azimuth plane and ±20° in the elevation plane; Liying Sun et al. introduced the use of metal partition antennas to achieve full-polarization wide-angle scanning in the journal "Multi-Polarization Array Antenna Based on Metal Partition". Using metal patches to implement multi-polarization phased arrays is also a common technique. For example, the inverted-F fed stacked patch antenna designed by T. H. Gan et al. in the journal "ABendable Wideband Dual-Polarization Conformal Phased-Array Antenna". Or the microstrip patch phased array antenna designed by Zhang Wenjie et al. in the journal "Ka-Band Ultra-Wideband Dual-Circular Polarization Low-Profile Phased Array Antenna" has achieved dual-polarization characteristics.

[0004] However, in the existing technologies for implementing multi-polarization phased array antennas, the main lobe beam pointing in the series-fed array direction will shift due to the change in the operating frequency, and most antennas can only achieve two polarization modes, with relatively high cross-polarization and a relatively complex structure, increasing the processing difficulty.

[0005] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0006] It should be noted that this section is intended to provide background or context for the technical solutions of the present disclosure stated in the claims. The description herein is not admitted to be prior art by virtue of being included in this section. Summary of the invention

[0007] The purpose of the embodiments of the present disclosure is to provide a single-layer quad-polarization one-dimensional phased array antenna with high polarization purity, thereby overcoming one or more problems caused by limitations and defects of related technologies at least to a certain extent.

[0008] According to an embodiment of the present disclosure, a single-layer quad-polarization one-dimensional phased array antenna with high polarization purity is provided, comprising: A dielectric plate, wherein a metal floor is provided under the dielectric plate; An antenna array, comprising a plurality of array units, each of which comprises a plurality of patches evenly spaced along a diagonal direction, the patches being arranged on a dielectric plate, each of which is excited by coupling with a quasi-T-shaped transmission line symmetrical on the left and right sides, and two adjacent array units being centrally symmetrical; A power division network, etched on the upper surface of the dielectric plate and distributed on both sides of each array unit; A 50-ohm coaxial line is arranged at the top of the power division network to provide bilateral feeding; The metallized vias are evenly distributed at the edge of each array unit and the central area of ​​the T-shaped transmission line, and are used for electromagnetic coupling suppression.

[0009] Furthermore, the dielectric plate is made of Rogers RO3006, the relative dielectric constant of the dielectric plate is 6.5, and the thickness of the metal floor is 0.035 mm.

[0010] Furthermore, the antenna array is an 8×8 antenna array, the 8×8 antenna array includes 8 array units, and each array unit includes 8 patches.

[0011] Furthermore, each patch is coupled and excited by the T-shaped transmission line that is symmetrical on both sides, and the distances between two adjacent patches are equal, so as to reduce the cross-polarization component.

[0012] Furthermore, the power division network adopts a bilateral feeding method, and both sides of each array unit are independently fed through the 50-ohm coaxial line to achieve four modes of horizontal linear polarization, vertical linear polarization, left-hand circular polarization and right-hand circular polarization.

[0013] Furthermore, an axial ratio of the left-hand circular polarization to the right-hand circular polarization is lower than 2 dB, and cross-polarization components in all polarization modes are lower than -20 dB.

[0014] Furthermore, the operating frequency band of the phased array antenna is 5.75 GHz to 5.85 GHz, and the main lobe beam pointing in the direction of the series-fed array remains constant within the operating frequency band and does not shift with frequency changes.

[0015] Furthermore, the port isolation of the antenna array is higher than 20 dB, and the active S parameter of each port is higher than 10 dB within the working frequency band.

[0016] Furthermore, the metallized via penetrates the dielectric plate and is connected to the metal floor, so as to suppress surface wave interference and improve radiation efficiency.

[0017] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: In the embodiment of the present disclosure, through the above-mentioned single-layer quadruple-polarized one-dimensional phased array antenna with high polarization purity, on the one hand, a single-layer RO3006 dielectric board is used, the antenna array and the power division network are printed on the upper surface of the dielectric board, and the metal floor is printed on the lower surface of the dielectric board, and the structure is simple. Each 1×8 linear array is fed in series by two one-to-eight power division networks, and the energy is coupled to the square radiation patch through a T-type structure, and finally an 8×8 antenna array is formed by staggered 1×8 linear arrays. The antenna array can realize four polarization modes, and each polarization can realize beam scanning with a pitch angle of ±30° on the yoz plane, and the main lobe beam pointing in the direction of the series-fed array remains constant within a wide frequency range and is not affected by changes in the operating frequency. Improved beam control and flexibility. On the other hand, staggered 1×8 linear arrays and finally form an 8×8 antenna array, greatly reducing cross polarization. All radiators and power division networks are printed on both sides of a layer of dielectric board, so that the antenna unit structure is simple, the processing is simple, and the processing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity in an exemplary embodiment of the present disclosure is shown.

[0020] Figure 2 Show Figure 1 Top view of the .

[0021] Figure 3Active S-parameter diagram of a single-layer four-polarized one-dimensional phased array antenna with high polarization purity.

[0022] Figure 4 Isolation diagram of each port of a single-layer four-polarized one-dimensional phased array antenna with high polarization purity.

[0023] Figure 5 Left-hand circular polarization axial ratio diagram of a single-layer four-polarized one-dimensional phased array antenna with high polarization purity.

[0024] Figure 6 Right-hand circular polarization axial ratio diagram of a single-layer four-polarized one-dimensional phased array antenna with high polarization purity.

[0025] Figure 7 Horizontal polarization and cross-polarization directly above the yoz plane.

[0026] Figure 8 Horizontal polarization and cross-polarization when scanning +30° in the yoz plane.

[0027] Fig. 9 Horizontal polarization and cross-polarization when scanning -30° in the yoz plane.

[0028] Fig.10 Vertical polarization and cross-polarization directly above the yoz plane.

[0029] Fig.11 Vertical polarization and cross-polarization when scanning +30° in the yoz plane.

[0030] Fig.12 Vertical polarization and cross-polarization when scanning -30° in the yoz plane.

[0031] Fig.13 Right-hand circular polarization and cross-polarization directly above the yoz plane.

[0032] Fig.14 Right-hand circular polarization and cross-polarization when scanning +30° in the yoz plane.

[0033] Fig.15 Right-hand circular polarization and cross-polarization when scanning -30° in the yoz plane.

[0034] Fig.16 Left-hand circular polarization and cross-polarization directly above the yoz plane.

[0035] Fig.17 Left-hand circular polarization and cross-polarization when scanning +30° in the yoz plane.

[0036] Fig.18 Left-hand circular polarization and cross-polarization when scanning -30° in the yoz plane.

[0037] Fig.19 This is the pointing diagram of the xoz surface beam under horizontal linear polarization 5.75GHZ conditions.

[0038] Fig. 20 This is the pointing diagram of the xoz surface beam under horizontal linear polarization 5.8GHZ conditions.

[0039] Fig.21 This is the pointing diagram of the xoz surface beam under horizontal linear polarization 5.85GHZ conditions.

[0040] Fig. 22 This is the pointing diagram of the xoz surface beam under vertical linear polarization 5.75GHZ conditions.

[0041] Fig.23 This is the pointing diagram of the xoz surface beam under vertical linear polarization 5.8GHZ conditions.

[0042] Fig.24 This is the pointing diagram of the xoz surface beam under vertical linear polarization 5.85GHZ conditions.

[0043] Fig.25 This is the pointing diagram of the xoz surface beam under right-hand circular polarization 5.75GHZ conditions.

[0044] Fig.26 This is the pointing diagram of the xoz surface beam under right-hand circular polarization 5.8GHZ conditions.

[0045] Fig. 27 This is the pointing diagram of the xoz surface beam under right-hand circular polarization 5.85GHZ conditions.

[0046] Fig.28 This is the pointing diagram of the xoz surface beam under left-hand circular polarization 5.75GHZ conditions.

[0047] Fig.29 This is the pointing diagram of the xoz surface beam under left-hand circular polarization 5.8GHZ conditions.

[0048] Fig.30 This is the pointing diagram of the xoz surface beam under left-hand circular polarization 5.85GHZ conditions.

[0049] In the figure, 1. Metal floor; 2. Dielectric board; 3. Antenna array; 4. 50 ohm coaxial line; 5. Power division network; 6. Metallized via. DETAILED DESCRIPTION

[0050] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0051] In addition, the accompanying drawings are only schematic illustrations of the embodiments of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0052] This exemplary embodiment provides a single-layer quadruple-polarized one-dimensional phased array antenna with high polarization purity. Figure 1 As shown in , the single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity may include: A dielectric plate (2), wherein a metal floor (1) is provided below the dielectric plate (2); An antenna array (3) comprising a plurality of array units, each of the array units comprising a plurality of patches evenly spaced apart in a diagonal direction, the patches being arranged on a dielectric plate (2), each of the patches being excited by coupling through a quasi-T-shaped transmission line symmetrically disposed on the left and right sides, and two adjacent array units being centrally symmetrical; A power division network (5) is etched on the upper surface of the dielectric plate (2) and is distributed on both sides of each array unit; A 50-ohm coaxial line (4) is arranged at the top starting point of the power division network (5) to provide bilateral feeding; Metallized vias (6) are evenly distributed at the edge of each array unit and the central area of ​​the T-shaped transmission line, and are used for electromagnetic coupling suppression.

[0053] Through the above-mentioned single-layer quadruple-polarized one-dimensional phased array antenna with high polarization purity, on the one hand, a single-layer RO3006 dielectric board is used, the antenna array and the power division network are printed on the upper surface of the dielectric board, and the metal floor is printed on the lower surface of the dielectric board, and the structure is simple. Each 1×8 linear array is fed in series by two one-to-eight power division networks, and the energy is coupled to the square radiation patch through a T-type structure, and finally an 8×8 antenna array is formed by staggered 1×8 linear arrays. The antenna array can realize four polarization modes, and each polarization can realize beam scanning with a pitch angle of ±30° on the yoz plane, and the main lobe beam pointing in the direction of the series-fed array remains constant in a wide frequency range and is not affected by changes in the operating frequency. Improve the control and flexibility of the beam. On the other hand, the staggered arrangement of 1×8 linear arrays and the final formation of an 8×8 antenna array greatly reduce cross-polarization. All radiators and power division networks are printed on both sides of a layer of dielectric board, making the antenna unit structure simple, simple to process, and low in processing cost.

[0054] Next, we will refer to Figures 1 to 30 The various parts of the above-mentioned single-layer quad-polarization one-dimensional phased array antenna with high polarization purity in this exemplary embodiment are described in more detail.

[0055] In one embodiment, the core objective of the present application is to design and implement a concise and efficient 8×8 patch antenna array (3) structure, aiming to achieve excellent phased array antenna performance by staggering the layout of 1×8 series-fed line arrays. The innovation of the present application lies in the successful design of an 8×8 patch antenna array (3) that can achieve four different polarization modes while ensuring a low level of cross-polarization components. This design not only improves the performance of the antenna, but also achieves accurate beam scanning of ±30° for each polarization mode on the yoz plane. It is worth mentioning that the directivity of the main lobe beam in the series-fed direction will also remain stable within the operating frequency range and will not shift due to changes in the operating frequency.

[0056] More specifically, Figure 1 As shown, the phased array antenna comprises a metal floor (1), a dielectric plate (2), an antenna array (3), a 50-ohm coaxial line (4), a power division network (5), and a metallized via (6).

[0057] like Figure 1 and Figure 2 As shown, the antenna array (3) is regularly arranged on the dielectric plate (2), and the distance from right to left is equal, and the overall arrangement direction of each unit is 180° clockwise rotation of the previous unit.

[0058] like Figure 1 and Figure 2As shown, the power division network (5) is etched on the dielectric plate (2) and distributed on the left and right sides of each antenna array (3) unit to achieve coupling and feeding.

[0059] like Figure 1 As shown, the 50-ohm coaxial line (4) is directly connected to the starting points of the top ends of the left and right sides of the power division network (5) to feed it.

[0060] like Figure 1 As shown, the metallized vias (6) are distributed at the edge of each array unit and the center area of ​​the T-shaped transmission line.

[0061] In a specific embodiment, the present application relates to a single-layer four-polarization one-dimensional phased array antenna with a frequency band of 5.75 to 5.85 GHz and high polarization purity. The antenna can achieve four polarizations, namely horizontal linear polarization, vertical linear polarization, left-hand circular polarization, and right-hand circular polarization, by using the advantage of a simple structure of a single-layer dielectric plate (2). It can achieve a beam scan of ±30° on the yoz plane, and the main lobe beam pointing in the direction of the series-fed array remains constant within a wide frequency range and does not change with changes in the operating frequency. In addition, the antenna array arrangement has significant advantages such as lower cross polarization.

[0062] In a specific embodiment, the present application provides a single-layer four-polarization one-dimensional phased array antenna with a simple structure and high polarization purity operating in the 5.75-5.85 GHz frequency band, comprising a dielectric plate (2), a metal floor (1), a metalized via (6), and a 50-ohm coaxial line (4), including 8 array units, each of which is composed of 8 patch antennas, and these patch antennas are connected in a left and right series feeding manner; the metal floor (1) is a copper plate with a thickness of 0.035 mm; a dielectric plate (2) is located directly above the metal floor (1); the main antenna radiator and a power division network (5) are etched on the upper surface of the dielectric plate (2), and each 1x8 antenna array (3) is designed to adopt a bilateral feeding method, that is, each 1×8 linear array power division network (5) is fed by two 50-ohm coaxial lines (4), providing signals from the left and right sides respectively. The antenna of the present application has a simple structure, rich functions, and is easy to process.

[0063] In a specific embodiment, the technical solution adopted by the present application to solve its technical problem includes the following steps: A single-layer four-polarization one-dimensional phased array antenna with a simple structure and high polarization purity, comprising a dielectric plate (2), a metal floor (1), a patch, an antenna array (3), a power division network (5), a metalized via (6), and a 50-ohm coaxial line (4).

[0064] The metal floor (1) is directly below the dielectric plate (2).

[0065] The antenna array (3) is an 8×8 antenna array (3).

[0066] The antenna array (3) is composed of 8 array units arranged in a regular pattern. Each unit of the one-dimensional antenna array (3) is fed by two 50-ohm coaxial lines (4) and a power division network (5) located on the left and right sides respectively. From right to left, the overall arrangement direction of each unit is 180° clockwise rotation of the previous unit.

[0067] The array units of the antenna are composed of 8 rectangular patches arranged in sequence along the diagonal direction, and the distance between each rectangular patch is equal. Each patch has two T-shaped transmission line coupling excitations on the left and right sides that are symmetrical about the diagonal line.

[0068] In the 8×8 antenna array (3), the antenna patches in each row are neatly arranged on the same straight line and the spacing between them is kept uniform.

[0069] The metallized vias (6) on the antenna are evenly distributed near the array units.

[0070] Preferably, the selected dielectric plate (2) is made of Rogers RO3006, with a relative dielectric constant of 6.5.

[0071] Preferably, the selected 50-ohm coaxial line (4) feeds the power division network (5).

[0072] The present application can realize four polarization modes through a simple structure, and each mode can realize ±30° beam scanning on the yoz plane, and the main lobe beam pointing in the series-fed array direction remains constant in a wide frequency range and is not affected by changes in the operating frequency, thereby improving the control and flexibility of the beam.

[0073] The present application staggers 1×8 linear arrays and finally forms an 8×8 antenna array (3), which greatly reduces cross polarization. All radiators and power division networks (5) are etched on both sides of a dielectric plate (2), making the antenna unit structure simple, easy to process, and low in processing cost.

[0074] In a specific embodiment, Using HFSS simulation software to design Figure 1 and Figure 2 The antenna model is simulated and the simulation results are as follows Figure 3-Figure 29 shown.

[0075] The active S parameters of the antenna are as follows: Figure 3 As shown in the figure, the active S parameters of each port are higher than 10dB in the entire operating frequency band.

[0076] The port isolation of the antenna is as follows: Figure 4 As shown, the port isolation is higher than 20dB.

[0077] The axial ratio of the antenna is shown in the figure Figure 5 and Figure 6 As shown, the axial ratios of left-hand circular polarization and right-hand circular polarization are both lower than 2 dB, which means that the optical fiber has a good axial ratio and good circular polarization characteristics.

[0078] The gain of the antenna in the horizontal linear polarization within the entire operating frequency band is as follows: Figures 7 to 9 As shown, the maximum directional gain is higher than 19dB, and ±30° beam scanning can be achieved on the yoz plane.

[0079] The gain of the vertical linear polarization of the antenna in the entire working frequency band is as follows Figure 10 to Figure 12 As shown, the maximum directional gain is higher than 19dB, and ±30° beam scanning can be achieved on the yoz plane.

[0080] The gain of the antenna in the whole working frequency band is as follows: Figure 13 to Figure 15 As shown, the maximum directional gain is higher than 19dB, and ±30° beam scanning can be achieved on the yoz plane.

[0081] The gain of the antenna in the entire working frequency band is Figure 16 to Figure 18 As shown, the maximum directional gain is higher than 19dB, and ±30° beam scanning can be achieved on the yoz plane.

[0082] Figures 3 to 15 It shows that the antenna has excellent comprehensive performance, including high gain, wide bandwidth, good polarization purity and flexible beam scanning capability.

[0083] Figure 16 to Figure 27 It represents the beam directivity of the antenna in the entire working frequency band. In each figure, dB() represents that the positive direction of the Z axis of the reference coordinate system is theta=0°, corresponding to a 0° beam scan on the yoz plane; in each figure, dB()_1 represents that the positive direction of the Z axis of the reference coordinate system is theta=30°, corresponding to a 30° beam scan on the yoz plane; in each figure, dB()_2 represents that the positive direction of the Z axis of the reference coordinate system is theta=-30°, corresponding to a -30° beam scan on the yoz plane.

[0084] Therefore, the horizontal linear polarization beam of the antenna is pointed as follows within the entire operating frequency band: Figure 19 to Figure 21 As shown, from the comparison of the graphs at the three frequency points of 5.75 GHz, 5.8 GHz and 5.85 GHz, it can be seen that the main lobe beam pointing in the direction of the series-fed array under this polarization condition does not change due to frequency changes.

[0085] The antenna's horizontally polarized beam is pointed in the entire operating frequency band. Figure 22 to Figure 24As shown, from the comparison of the graphs at the three frequency points of 5.75 GHz, 5.8 GHz and 5.85 GHz, it can be seen that the main lobe beam pointing in the direction of the series-fed array under this polarization condition does not change due to frequency changes.

[0086] The antenna's horizontally polarized beam is pointed in the entire operating frequency band. Figure 25 to Figure 27 As shown, from the comparison of the graphs at the three frequency points of 5.75 GHz, 5.8 GHz and 5.85 GHz, it can be seen that the main lobe beam pointing in the direction of the series-fed array under this polarization condition does not change due to frequency changes.

[0087] The antenna's horizontally polarized beam is pointed in the entire operating frequency band. Figure 28 to Figure 30 As shown, from the comparison of the graphs at the three frequency points of 5.75 GHz, 5.8 GHz and 5.85 GHz, it can be seen that the main lobe beam pointing in the direction of the series-fed array under this polarization condition does not change due to frequency changes.

[0088] Figure 19 to Figure 30 It is shown that the antenna has stable beam pointing within a wide frequency band and does not shift with changes in operating frequency and polarization mode.

[0089] In general, the antenna of the present application has: The overall structure is simple, and the multi-polarized feeding structure can be realized by using only one dielectric plate (2), and the staggered arrangement between the linear arrays can improve the port isolation and reduce the cross-polarization level. While achieving stable beam scanning on the yoz plane, it is also ensured that the beam pointing always remains stable in the series feeding direction even if the operating frequency changes.

[0090] Through the above-mentioned single-layer quadruple-polarized one-dimensional phased array antenna with high polarization purity, on the one hand, a single-layer RO3006 dielectric board is used, the antenna array and the power division network are printed on the upper surface of the dielectric board, and the metal floor is printed on the lower surface of the dielectric board, and the structure is simple. Each 1×8 linear array is fed in series by two one-to-eight power division networks, and the energy is coupled to the square radiation patch through a T-type structure, and finally an 8×8 antenna array is formed by staggered 1×8 linear arrays. The antenna array can realize four polarization modes, and each polarization can realize beam scanning with a pitch angle of ±30° on the yoz plane, and the main lobe beam pointing in the direction of the series-fed array remains constant in a wide frequency range and is not affected by changes in the operating frequency. Improve the control and flexibility of the beam. On the other hand, the staggered arrangement of 1×8 linear arrays and the final formation of an 8×8 antenna array greatly reduce cross-polarization. All radiators and power division networks are printed on both sides of a layer of dielectric board, making the antenna unit structure simple, simple to process, and low in processing cost.

[0091] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. in the above description indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0092] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0093] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0094] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0096] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A single-layer quadruple-polarized one-dimensional phased array antenna with high polarization purity, characterized in that: include: A dielectric plate, wherein a metal floor is provided under the dielectric plate; An antenna array, comprising a plurality of array units, each of which comprises a plurality of patches evenly spaced along a diagonal direction, the patches being arranged on a dielectric plate, each of which is excited by coupling with a quasi-T-shaped transmission line symmetrical on the left and right sides, and two adjacent array units being centrally symmetrical; A power division network, etched on the upper surface of the dielectric plate and distributed on both sides of each array unit; A 50-ohm coaxial line is arranged at the top of the power division network to provide bilateral feeding; The metallized vias are evenly distributed at the edge of each array unit and the central area of ​​the T-shaped transmission line, and are used for electromagnetic coupling suppression.

2. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: The dielectric plate is made of Rogers RO3006, the relative dielectric constant of the dielectric plate is 6.5, and the thickness of the metal floor is 0.035 mm.

3. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: The antenna array is an 8×8 antenna array, and the 8×8 antenna array includes 8 array units, and each array unit includes 8 patches.

4. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: Each patch is excited by coupling through the symmetrical T-shaped transmission lines on both sides, and the distances between two adjacent patches are equal, so as to reduce the cross-polarization component.

5. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: The power division network adopts a bilateral feeding method, and both sides of each array unit are independently fed through the 50-ohm coaxial line to achieve four modes: horizontal linear polarization, vertical linear polarization, left-hand circular polarization and right-hand circular polarization.

6. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 5, characterized in that: An axial ratio of the left-hand circular polarization to the right-hand circular polarization is lower than 2 dB, and cross-polarization components in all polarization modes are lower than -20 dB.

7. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: The operating frequency band of the phased array antenna is 5.75 GHz to 5.85 GHz, and the main lobe beam pointing in the direction of the series-fed array remains constant within the operating frequency band and does not shift with frequency changes.

8. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 7, characterized in that: The port isolation of the antenna array is higher than 20 dB, and the active S parameter of each port is higher than 10 dB within the working frequency band.

9. The single-layer quadruple-polarization one-dimensional phased array antenna with high polarization purity according to claim 1, characterized in that: The metallized via penetrates the dielectric plate and is connected to the metal floor, so as to suppress surface wave interference and improve radiation efficiency.

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