Antenna device
By designing a dual-frequency antenna structure with a 90-degree angle and intersection point and an alternating arrangement, the problem that existing antenna devices cannot simultaneously possess an ideal circular polarization field pattern and reduce size was solved, thus achieving both size reduction and circular polarization effect of the antenna device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YAODENG ELECTRONICS COMM TECH KUNSHAN CO LTD
- Filing Date
- 2023-06-30
- Publication Date
- 2026-06-16
AI Technical Summary
Existing antenna devices cannot simultaneously possess the advantages of ideal circular polarization field pattern and reduced size, resulting in the inability to reduce the substrate size.
The system employs a first and second dual-band antenna structure. By designing the first and second extension lines to have a 90-degree angle and an intersection point, and by having the first and second conductive plates rotate 90 degrees around the intersection point, a circular polarization field pattern is achieved. Furthermore, the size is reduced by arranging the antenna array in an alternating manner.
It achieves an ideal circular polarization field pattern while reducing the size of the antenna device and improving space utilization efficiency.
Smart Images
Figure CN116706520B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a device, and more particularly to an antenna device. Background Technology
[0002] To fulfill specific functions (e.g., MIMO), existing antenna devices typically consist of a substrate and multiple dual-band antennas mounted on it, arranged in an array. However, when designed to achieve an ideal circular polarization pattern, the arrangement space for the multiple antennas expands, preventing a reduction in substrate size. In other words, existing antenna devices cannot simultaneously offer the advantages of both "smaller size" and "ideal circular polarization pattern."
[0003] Therefore, the inventor believed that the above-mentioned defects could be improved, and thus devoted himself to research and applied scientific principles, and finally proposed an invention that is reasonably designed and effectively improves the above-mentioned defects. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide an antenna device that addresses the shortcomings of the prior art.
[0005] This invention discloses an antenna device, comprising: a carrier; at least one antenna array disposed on the carrier, the at least one antenna array comprising: a first dual-band antenna structure comprising a first conductive sheet, and a first transmitting antenna and a first receiving antenna electrically coupled to the first conductive sheet, wherein the center of a region on which the first transmitting antenna is projected onto the first conductive sheet and the center of a region on which the first receiving antenna is projected onto the first conductive sheet are both traversed by a first extension line; a second dual-band antenna structure comprising a second conductive sheet, and a second transmitting antenna and a second receiving antenna electrically coupled to the second conductive sheet, wherein the center of a region on which the second transmitting antenna is projected onto the second conductive sheet and the center of a region on which the second receiving antenna is projected onto the second conductive sheet are both traversed by a second extension line; wherein the first extension line and the second extension line have an included angle of 90 degrees, and the first extension line and the second extension line also have an intersection point, and the first conductive sheet and the second conductive sheet have a 90-degree rotational symmetry relationship about the intersection point.
[0006] In summary, the antenna device disclosed in the embodiments of the present invention, through the design that "the center of a region on which the first transmitting antenna is projected onto the first conductive sheet and the center of a region on which the first receiving antenna is projected onto the first conductive sheet are both traversed by a first extension line", "the center of a region on which the second transmitting antenna is projected onto the second conductive sheet and the center of a region on which the second receiving antenna is projected onto the second conductive sheet are both traversed by a second extension line", and "the first extension line and the second extension line have an included angle of 90 degrees, and the first extension line and the second extension line also have an intersection point, and the first conductive sheet and the second conductive sheet have a 90-degree rotational symmetry relationship with the intersection point as the rotation point", the antenna device can not only have the effect of an ideal circular polarization field pattern, but also reduce its size at the same time.
[0007] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description
[0008] Figure 1 This is a three-dimensional schematic diagram of the dual-frequency antenna structure according to the first embodiment of the present invention.
[0009] Figure 2 For along Figure 1 A schematic diagram of the cross section along section II-II.
[0010] Figure 3 This is a top view of the dual-band antenna structure according to the first embodiment of the present invention.
[0011] Figure 4 This is a bottom view of the dual-band antenna structure according to the first embodiment of the present invention.
[0012] Figure 5 This is a schematic diagram of the return loss data measured by the dual-frequency antenna structure according to the first embodiment of the present invention.
[0013] Figure 6 This is a plan view of the antenna device according to the second embodiment of the present invention.
[0014] Figure 7 A schematic diagram of the field pattern generated by the first transmitting antenna of the antenna device according to the second embodiment of the present invention.
[0015] Figure 8 for Figure 7 A schematic diagram of the field shape on the H-plane or E-plane.
[0016] Figure 9A schematic diagram of the field pattern generated by the second transmitting antenna of the antenna device according to the second embodiment of the present invention.
[0017] Figure 10 for Figure 9 A schematic diagram of the field shape on the H-plane or E-plane.
[0018] Figure 11 A schematic diagram of the field pattern generated by the first transmitting antenna and the second transmitting antenna of the antenna device according to the second embodiment of the present invention.
[0019] Figure 12 for Figure 11 A schematic diagram of the field shape on the H-plane or E-plane.
[0020] Figure 13 A schematic diagram of the field pattern generated by the first receiving antenna of the antenna device according to the second embodiment of the present invention.
[0021] Figure 14 for Figure 13 A schematic diagram of the field shape on the H-plane or E-plane.
[0022] Figure 15 A schematic diagram of the field pattern generated by the second receiving antenna of the antenna device according to the second embodiment of the present invention.
[0023] Figure 16 for Figure 15 A schematic diagram of the field shape on the H-plane or E-plane.
[0024] Figure 17 A schematic diagram of the field pattern generated by the first receiving antenna and the second receiving antenna of the antenna device according to the second embodiment of the present invention.
[0025] Figure 18 for Figure 17 A schematic diagram of the field shape on the H-plane or E-plane.
[0026] Figure 19 This is a plan view of the antenna device according to the third embodiment of the present invention.
[0027] Figure 20 A schematic diagram of the field pattern generated by the first transmitting antenna and the second transmitting antenna of the antenna device according to the third embodiment of the present invention.
[0028] Figure 21 for Figure 20 A schematic diagram of the field shape on the H-plane or E-plane.
[0029] Figure 22A schematic diagram of the field pattern generated by the first receiving antenna and the second receiving antenna of the antenna device according to the third embodiment of the present invention.
[0030] Figure 23 for Figure 22 A schematic diagram of the field shape on the H-plane or E-plane.
[0031] Figure 24 A schematic diagram of the left-hand circular polarization field pattern of the first transmitting antenna and the second transmitting antenna of the antenna device according to the third embodiment of the present invention during wavenumber switching.
[0032] Figure 25 A schematic diagram of the right-hand circularly polarized field pattern of the first and second transmitting antennas of the antenna device according to the third embodiment of the present invention during wavenumber switching.
[0033] The reference numerals in the above figures are as follows: 1000, 1000': Antenna device; 100A: First dual-band antenna structure; 3A: First conductive sheet; 4A: First transmitting antenna; 5A: First receiving antenna; 100B: Second dual-band antenna structure; 3B: Second conductive sheet; 4B: Second transmitting antenna; 5B: Second receiving antenna; 100: Dual-band antenna structure; 1: Substrate; 11: First layer; 12: Second layer; 2: Grounding element; H21: First through hole; H22: Second through hole; 3: Conductive sheet; S31: First side; S32: Second side; S33: Third side; S34: Fourth side; S35: Fifth side; S36: Sixth side; 4: Transmitting antenna; 41: First coupling conductive pad; 42: First conductive post; 43: First feed conductive pad; 5: Receiving antenna; 51: Second coupling conductive pad; 52: Second conductive post; 53: Second feed conductive pad; D 1: First shortest distance; D2: Second shortest distance; D3: Third shortest distance; D4: Fourth shortest distance; G1: Transmit data line; G2: Receive data line; AR: Antenna array; BR: Carrier; L1: First extension line; L2: Second extension line; C1: Intersection point; C2: Center point; θ: Angle; P4A, P4B, P5A, P5B, PR, PL, PR', PL', PR”, PL”: Field pattern; R1: First row; R2: Second row; R3: Third row; T1~T5: Lines. Detailed Implementation
[0034] The following specific embodiments illustrate the implementation of the "antenna device" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.
[0035] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used in this document should, as appropriate, include any combination of one or more of the related listed items.
[0036] Additionally, in the following description, if it is indicated that a specific diagram is referred to or as shown in a specific diagram, it is only to emphasize that most of the relevant content in the following description appears in that specific diagram, but does not limit the following description to refer only to that specific diagram.
[0037] [First Embodiment]
[0038] See Figures 1 to 5 As shown, this embodiment provides a dual-band antenna structure 100. Figure 1 and Figure 2 As shown, the dual-band antenna structure 100 is applicable to a transmission frequency band, and the transmission frequency band includes a transmission frequency and a reception frequency. The dual-band antenna structure 100 includes a substrate 1, and a grounding element 2, a conductive sheet 3, a transmitting antenna 4, and a receiving antenna 5 disposed on the substrate 1. Next, the components of the dual-band antenna structure 100 and their connection relationships are described.
[0039] Re-reference Figure 2 As shown, the substrate 1 in this embodiment has a multilayer structure and has two printed circuit boards, which are stacked on top of each other and are respectively defined as a first layer 11 and a second layer 12.
[0040] like Figure 2 and Figure 4As shown, the grounding element 2 in this embodiment can be a conductive copper foil, but the present invention is not limited thereto. The grounding element 2 is disposed on the side of the second layer 12 away from the first layer 11, and the grounding element 2 has a first through hole H21 and a second through hole H22 spaced apart from each other in a circular shape on the second layer 12. In other words, the side of the second layer 12 away from the first layer 11 has two configuration areas that are not covered by the grounding element 2.
[0041] See Figure 2 and Figure 3 As shown, the conductive sheet 3 is disposed on the side of the first layer 11 away from the second layer 12. In this embodiment, the conductive sheet 3 is a hexagonal conductive copper foil with six sides, and any two opposing sides are parallel to each other and have a first shortest distance D1. The first shortest distance D1 is between 0.45 and 0.55 times the wavelength corresponding to a center frequency of the transmission frequency band.
[0042] For example, the conductive sheet 3 has a first side S31, a second side S32, a third side S33, a fourth side S34, a fifth side S35, and a sixth side S36 in a clockwise direction. The first side S31 and the fourth side S34 are opposite to each other and parallel to each other, the second side S32 and the fifth side S35 are opposite to each other and parallel to each other, and the third side S33 and the sixth side are opposite to each other and parallel to each other. Wherein, when the wavelength corresponding to the center frequency of the transmission band is 12 millimeters (mm), the shortest distance between the first side S31 and the fourth side S34, the shortest distance between the second side S32 and the fifth side S35, and the shortest distance between the third side S33 and the sixth side S36 can be between 5.4 millimeters (mm) and 6.6 millimeters (mm).
[0043] Re-reference Figure 2 and Figure 4 As shown, the transmitting antenna 4 has the transmitting frequency and includes a first coupling conductive pad 41, a first conductive post 42, and a first feed conductive pad 43. In this embodiment, the first coupling conductive pad 41 can be a circular conductive copper foil, but the invention is not limited thereto. The first coupling conductive pad 41 is disposed between the first layer 11 and the second layer 12, such that the first coupling conductive pad 41 is sandwiched between the two printed circuit boards, and the positions of the first coupling conductive pad 41 correspond to the first through-hole H21. That is, the area of the first coupling conductive pad 41 projected onto the second layer 12 is located within the first through-hole H21.
[0044] In this embodiment, the first conductive post 42 may be, for example, a conductive blind hole or a conductive through hole, but the present invention is not limited thereto. The first conductive post 42 is electrically coupled to the first coupling conductive pad 41 and the conductive sheet 3.
[0045] like Figure 2 and Figure 4 As shown, the first feed conductive pad 43 is disposed on the side of the second layer 12 away from the first layer 11 and located within the first through hole H21. The first feed conductive pad 43 and the first coupling conductive pad 41 can generate a series capacitance effect and produce a left-hand circular polarization. Furthermore, the first feed conductive pad 43 can also generate a parallel capacitance effect with the grounding member 2.
[0046] In this embodiment, the first feed conductive pad 43 is a circular conductive copper foil, and the position of the first feed conductive pad 43 projected onto the conductive sheet 3 is adjacent to one of the side edges (i.e., the first side edge S31). The first feed conductive pad 43 and the first through-hole H21 share a center. Furthermore, the center of the first feed conductive pad 43 preferably overlaps with the center of the first coupling conductive pad 41 projected onto the second layer 12, and the area of the first feed conductive pad 43 is approximately equal to that of the first coupling conductive pad 41. In other words, there is a correlation between the dimensions of the first feed conductive pad 43, the first through-hole H21, and the first coupling conductive pad 41.
[0047] Of course, slight variations in the linkage are permissible (i.e., allowable tolerances). For example, in other embodiments of the invention not shown, the area of the first feed conductive pad 43 may be slightly larger or slightly smaller than the area of the first coupling conductive pad 41.
[0048] Re-reference Figure 2 and Figure 4 As shown, the receiving antenna 5 has the receiving frequency and includes a second coupling conductive pad 51, a second conductive post 52, and a second feed conductive pad 53. In this embodiment, the second coupling conductive pad 51 can be a circular conductive copper foil, but the invention is not limited thereto. The second coupling conductive pad 51 is disposed between the first layer 11 and the second layer 12, such that the second coupling conductive pad 51 is sandwiched between the two printed circuit boards, and the positions of the second coupling conductive pad 51 correspond to the second through-hole H22. That is, the area of the first coupling conductive pad 41 projected onto the second layer 12 is located within the second through-hole H22.
[0049] In this embodiment, the second conductive post 52 may be, for example, a conductive blind hole or a conductive through hole, but the present invention is not limited thereto. The second conductive post 52 is electrically coupled to the second coupling conductive pad 51 and the conductive sheet 3.
[0050] like Figure 2 and Figure 4 As shown, the second feed conductive pad 53 is disposed on the side of the second layer 12 away from the first layer 11 and located within the second through hole H22. The second feed conductive pad 53 and the second coupling conductive pad 51 can generate a series capacitance effect and produce a right-hand circular polarization. Furthermore, the second feed conductive pad 53 can also generate a parallel capacitance effect with the grounding member 2.
[0051] In this embodiment, the second feed conductive pad 53 is a circular conductive copper foil, and the position of the second feed conductive pad 53 projected onto the conductive sheet 3 is adjacent to one of the side edges (i.e., the second side edge S32). The second feed conductive pad 53 and the second through-hole H22 share a center. Furthermore, the center of the second feed conductive pad 53 preferably overlaps with the center of the second coupling conductive pad 51 projected onto the second layer 12, and the area of the second feed conductive pad 53 is approximately equal to that of the second coupling conductive pad 51. In other words, there is a correlation between the dimensions of the second feed conductive pad 53, the second through-hole H22, and the first coupling conductive pad 41.
[0052] Of course, slight variations in the linkage are permissible (i.e., allowable tolerances). For example, in other embodiments of the invention not shown, the area of the second feed conductive pad 53 may be slightly larger or slightly smaller than the area of the second coupling conductive pad 51.
[0053] Additionally, it is worth noting that, in order to ensure that the series capacitance effect of the first feed conductive pad 43 and the second feed conductive pad 53 is not disturbed, the area of the first coupling conductive pad 41 projected onto the second layer 12 is not greater than the area of the first through hole H21, and the area of the second coupling conductive pad 51 projected onto the second layer 12 is not greater than the area of the second through hole H22.
[0054] Therefore, the second shortest distance D2 between the position of the first coupling conductive pad 41 (or the first feed conductive pad 43) projected onto the conductive sheet 3 and the first side S31 can be not equal to the third shortest distance D3 between the position of the second coupling conductive pad 51 (or the second feed conductive pad 53) projected onto the conductive sheet 3 and the second side S32, and the second shortest distance D2 is less than the third shortest distance D3, so that the transmission frequency and the receiving frequency can have different ranges.
[0055] It should be noted that, Figure 5 This is a graph showing the return loss data measured by the dual-band antenna structure 100 of the present invention, and the graph includes a transmit data line G1 and a receive data line G2. From the graph, it is clear that the transmit data line G1 has low power between 14 GHz and 15 GHz, and the receive data line G2 has low power between 10 GHz and 12.7 GHz. That is, the transmit frequency of the dual-band antenna structure 100 of the present invention is preferably limited to between 14 GHz and 15 GHz, and the receive frequency is preferably limited to between 10.7 GHz and 12.7 GHz.
[0056] [Second Embodiment]
[0057] like Figures 6 to 18 As shown, this is a second embodiment of the present invention. The antenna device 1000 of this embodiment includes a carrier BR and an antenna array AR disposed on the carrier BR. The antenna array AR includes two dual-band antenna structures as described in the first embodiment, and the two dual-band antenna structures are defined as a first dual-band antenna structure 100A and a second dual-band antenna structure 100B. Furthermore, the carrier BR is a shared substrate for the two dual-band antenna structures of the first embodiment, and the carrier BR has the same structure as the substrate of each dual-band antenna structure.
[0058] In other words, the detailed structures of the carrier BR, the first dual-band antenna structure 100A, and the second dual-band antenna structure 100B are described in the first embodiment of the dual-band antenna structure 100, and will not be repeated here. Next, the configuration relationship between the first dual-band antenna structure 100A and the second dual-band antenna structure 100B will be described.
[0059] Cooperate Figure 6As shown, the first dual-band antenna structure 100A includes a first conductive sheet 3A and a first transmitting antenna 4A and a first receiving antenna 5A electrically coupled to the first conductive sheet 3A. In this embodiment, the first conductive sheet 3A is hexagonal, while the first transmitting antenna 4A and the first receiving antenna 5A are circular. A first extension line L1 passes through the center of a region (i.e., the center of the circle) on which the first transmitting antenna 4A is projected onto the first conductive sheet 3A and the center of a region (i.e., the center of the circle) on which the first receiving antenna 5A is projected onto the first conductive sheet 3A.
[0060] Re-reference Figure 6 As shown, the second dual-band antenna structure 100B includes a second conductive sheet 3B and a second transmitting antenna 4B and a second receiving antenna 5B electrically coupled to the second conductive sheet 3B. In this embodiment, the second conductive sheet 3B is hexagonal, while the second transmitting antenna 4B and the second receiving antenna 5B are circular. A second extension line L2 passes through the center of a region on the second conductive sheet 3B projected onto the second transmitting antenna 4B (i.e., the center of the circle) and the center of a region on the second conductive sheet 3B projected onto the second receiving antenna 5B (i.e., the center of the circle).
[0061] Wherein, the first extension line L1 and the second extension line L2 have an included angle θ of 90 degrees, and the first extension line L1 and the second extension line L2 also have an intersection point C1. The first conductive sheet 3A and the second conductive sheet 3B have a rotational symmetry relationship of 90 degrees with the intersection point C1 as the rotation point. Accordingly, the first dual-frequency antenna structure 100A and the second dual-frequency antenna structure 100B can generate a circularly polarized field pattern, and the two occupy the least space on the carrier BR (that is, the spacing between the first dual-frequency antenna structure 100A and the second dual-frequency antenna structure 100B can be the shortest).
[0062] It is worth noting that the phase difference between the first transmitting antenna 4A and the second transmitting antenna 4B is preferably 90 degrees, so that the electromagnetic field of the first transmitting antenna 4A and the electromagnetic field of the second transmitting antenna 4B can be perpendicular to each other in the elevation plane (i.e., theta) and azimuth plane (i.e., phi), so as to produce a left-hand circularly polarized (LHCP) with an intersection point C1 approaching 1.
[0063] For example, such as Figure 7 As shown, the first transmitting antenna 4A in this embodiment can generate a field pattern P4A independently at a single frequency. Figure 8 The diagram below shows the field type P4A in the H-plane or E-plane. Figure 9As shown, the second transmitting antenna 4B in this embodiment can generate a field pattern P4B independently at a single frequency. Figure 10 The diagram below shows the field type P4B in the H-plane or E-plane. Figure 11 As shown, in this embodiment, the first transmitting antenna 4A and the second transmitting antenna 4B can jointly generate a left-hand circularly polarized field pattern PL at a certain frequency. Figure 12 The diagram below shows the field type PL in the H-plane or E-plane.
[0064] in, Figure 7 , Figure 9 and Figure 11 The lower the density of the dots, the higher the gain value. Figure 8 , Figure 10 and Figure 12 The schematic diagram has four lines T1 to T5. Line T1 represents the total gain, line T2 represents the gain in the θ direction, line T3 represents the gain in the Φ direction, line T4 represents the gain in the left direction, and line T5 represents the gain in the right direction. Figure 11 and Figure 12 It can be seen that the field pattern PL shared by the first transmitting antenna 4A and the second transmitting antenna 4B is left-handed circularly polarized and close to a circle.
[0065] Furthermore, the phase difference between the first receiving antenna 5A and the second receiving antenna 5B is preferably 90 degrees, so that the electromagnetic field of the first receiving antenna 5A and the electromagnetic field of the second receiving antenna 5B are perpendicular to each other in the elevation plane (i.e., theta) and azimuth plane (i.e., phi), so as to produce a right-hand circular polarization (RHCP) with a small axial ratio.
[0066] For example, such as Figure 13 As shown, the first receiving antenna 5A in this embodiment can generate a field pattern P5A independently at a single frequency. Figure 14 The diagram below shows the field type P5A in the H-plane or E-plane. Figure 15 As shown, the second receiving antenna 5B in this embodiment can generate a field pattern P5B independently in a single frequency. Figure 16 The diagram below shows the field type P5B in the H-plane or E-plane. Figure 17 As shown, in this embodiment, the first receiving antenna 5A and the second receiving antenna 5B can jointly generate a right-hand circularly polarized field pattern PR at a certain frequency. Figure 17 The diagram below shows the field type PR in the H plane or the E plane.
[0067] in, Figure 13 , Figure 15 and Figure 17 The lower the density of the dots, the higher the gain value. Figure 14 , Figure 16 and Figure 18 The schematic diagram has five lines T1 to T5, where line T1 represents the total gain, line T2 represents the gain in the θ direction, line T3 represents the gain in the Φ direction, line T4 represents the gain in the left direction, and line T5 represents the gain in the right direction. Figure 17 and Figure 18 It can be seen that the field pattern PR shared by the first receiving antenna 5A and the second receiving antenna 5B is right-hand circularly polarized and close to a circle.
[0068] [Third Embodiment]
[0069] like Figures 19 to 25 As shown, this is the third embodiment of the present invention. Figure 19 As shown, the antenna device 1000' of this embodiment is similar to the antenna device 1000 of the second embodiment described above. The similarities between the two embodiments will not be repeated. The main difference between the antenna device 1000' of this embodiment and the second embodiment is that the antenna device 1000' includes multiple antenna arrays AR.
[0070] Specifically, such as Figure 19 As shown, in this embodiment, the multiple antenna arrays AR are arranged in an alternating pattern of multiple rows and columns, and each antenna array AR has a center point C2. In any two adjacent rows, there is a fourth shortest distance D4 between the center points C2 of any two adjacent antenna arrays AR in different rows. This fourth shortest distance D4 is preferably between 0.45 and 0.55 times the wavelength corresponding to the center frequency of the transmission frequency band. Accordingly, the multiple antenna arrays AR can influence each other, resulting in a small axial ratio between the right-hand circular polarization and the left-hand circular polarization ultimately generated by the antenna device 1000.
[0071] For example, when the first transmitting antenna 4A of each of the first dual-band antenna structures 100A is input with a signal of (1W, 90 degrees) and the second transmitting antenna 4B of each of the second dual-band antenna structures 100B is input with a signal of (1W, 0 degrees), the antenna structures can obtain a signal at 10.7 GHz to 12.7 GHz. Figure 20 The one in the middle is a left-handed circularly polarized field type PL'. Figure 21 The diagram below shows the field type PL' in the H plane or the E plane.
[0072] Furthermore, when the first receiving antenna 5A of each of the first dual-band antenna structures 100A receives a signal at (1W, 0 degrees) and the second receiving antenna 5B of each of the second dual-band antenna structures 100B receives a signal at (1W, 90 degrees), the antenna structures can obtain signals at 10.7 GHz to 12.7 GHz. Figure 22 The one in the middle is a right-handed circularly polarized field type PR'. Figure 23 The diagram below shows the field type PR' in the H plane or the E plane.
[0073] in, Figure 20 ,and Figure 22 The lower the density of the dots, the higher the gain value. Figure 21 ,and Figure 23 The schematic diagram has five lines T1 to T5, where line T1 represents the total gain, line T2 represents the gain in the θ direction, line T3 represents the gain in the Φ direction, line T4 represents the gain in the left direction, and line T5 represents the gain in the right direction. Figure 21 and Figure 23 It can be seen that the aspect ratios of the two field types PL' and PR' are significantly smaller than those of the second embodiment.
[0074] Additionally, the antenna device 1000 in this embodiment also possesses the advantage of beam switching. Specifically, in any two adjacent rows, the phase difference between the first transmitting antennas 4A of any two adjacent antenna arrays AR in different rows can be 50 degrees or 0 degrees, and the phase difference between the second transmitting antennas 4B of any two adjacent antenna arrays AR in different rows can also be 50 degrees or 0 degrees.
[0075] For example, when the first transmitting antenna 4A and the second transmitting antenna 4B located in the first row R1 are respectively input with signals of (1W, 0 degrees) and (1W, 90 degrees), the first transmitting antenna 4A and the second transmitting antenna 4B located in the second row R2 can be respectively input with signals of (1W, 50 degrees) and (1W, 140 degrees), and the first transmitting antenna 4A and the second transmitting antenna 4B located in the third row R3 can be respectively input with signals of (1W, 100 degrees) and (1W, 190 degrees) (and so on). Accordingly, the antenna device 1000 can achieve beam switching corresponding to left-hand circular polarization to generate, for example... Figure 24 The field type shown is PL. Among them, Figure 24 The lower the density of the dots, the higher the gain value.
[0076] Furthermore, in any two adjacent rows, the phase difference between the first receiving antennas 5A of any two adjacent antenna arrays AR in different rows can be 50 degrees or 0 degrees, and the phase difference between the second receiving antennas 5B of any two adjacent antenna arrays AR in different rows can also be 50 degrees or 0 degrees.
[0077] For example, when the first receiving antenna 5A and the second receiving antenna 5B located in the first row R1 are respectively input with signals of (1W, 90 degrees) and (1W, 0 degrees), the first receiving antenna 5A and the second receiving antenna 5B located in the second row R2 can be respectively input with signals of (1W, 140 degrees) and (1W, 50 degrees), and the first receiving antenna 5A and the second receiving antenna 5B located in the third row R3 can be respectively input with signals of (1W, 190 degrees) and (1W, 100 degrees) (and so on). Accordingly, the antenna device 1000' can achieve beam switching corresponding to right-hand circular polarization to generate, for example... Figure 25 The field type shown is PR. Figure 25 The lower the density of the dots, the higher the gain value.
[0078] [Technical Effects of the Embodiments of the Invention]
[0079] In summary, the antenna device disclosed in the embodiments of the present invention, through the design that "the center of a region on which the first transmitting antenna is projected onto the first conductive sheet and the center of a region on which the first receiving antenna is projected onto the first conductive sheet are both traversed by a first extension line", "the center of a region on which the second transmitting antenna is projected onto the second conductive sheet and the center of a region on which the second receiving antenna is projected onto the second conductive sheet are both traversed by a second extension line", and "the first extension line and the second extension line have an included angle of 90 degrees, and the first extension line and the second extension line also have an intersection point, and the first conductive sheet and the second conductive sheet have a 90-degree rotational symmetry relationship with the intersection point as the rotation point", the antenna device can not only have the effect of an ideal circular polarization field pattern, but also reduce its size at the same time.
[0080] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention.
Claims
1. An antenna device, characterized in that, include: One carrier; At least one antenna array is disposed on the carrier, the at least one antenna array comprising: A first dual-band antenna structure includes a first conductive sheet, and a first transmitting antenna and a first receiving antenna electrically coupled to the first conductive sheet. The center of a circular area on which the first transmitting antenna is projected onto the first conductive sheet and the center of a circular area on which the first receiving antenna is projected onto the first conductive sheet are both passed through by a first extension line. A second dual-band antenna structure includes a second conductive sheet, and a second transmitting antenna and a second receiving antenna electrically coupled to the second conductive sheet. The center of a circular area on which the second transmitting antenna is projected onto the second conductive sheet and the center of a circular area on which the second receiving antenna is projected onto the second conductive sheet are both passed through by a second extension line. The first extension line and the second extension line form a 90-degree angle, and the first extension line and the second extension line also have an intersection point. The first conductive sheet and the second conductive sheet are rotated around the intersection point to form a 90-degree symmetrical relationship.
2. The antenna device according to claim 1, characterized in that, The number of the at least one antenna array is further limited to multiple, and the multiple antenna arrays are arranged alternately in a multi-row and multi-column manner.
3. The antenna device according to claim 2, characterized in that, The antenna device is applicable to a transmission frequency band, and each of the antenna arrays has a center point; in any two adjacent rows, there is a shortest distance between the center points of any two adjacent antenna arrays in different rows, and the shortest distance is between 0.45 times and 0.55 times the wavelength corresponding to a center frequency of the transmission frequency band.
4. The antenna device according to claim 2, characterized in that, In any two adjacent rows, the phase difference between the first transmitting antennas of any two adjacent antenna arrays in different rows is 50 degrees or 0 degrees, and the phase difference between the second transmitting antennas of any two adjacent antenna arrays in different rows is 50 degrees or 0 degrees, so as to achieve beam switching.
5. The antenna device according to claim 2, characterized in that, In any two adjacent rows, the phase difference between the first receiving antennas of any two adjacent antenna arrays in different rows is 50 degrees or 0 degrees, and the phase difference between the second receiving antennas of any two adjacent antenna arrays in different rows is 50 degrees or 0 degrees, so as to achieve beam switching.
6. The antenna device according to claim 1, characterized in that, The phase difference between the first transmitting antenna and the second transmitting antenna is 90 degrees, and the phase difference between the first receiving antenna and the second receiving antenna is 90 degrees.
7. The antenna device according to claim 1, characterized in that, The first transmitting antenna and the second transmitting antenna can each generate a left-hand circular polarization, and the first receiving antenna and the second receiving antenna can each generate a right-hand circular polarization.
8. The antenna device according to claim 1, characterized in that, The first transmitting antenna and the first receiving antenna are both circular, and the second transmitting antenna and the second receiving antenna are both circular.