Dual-band antenna and electronic device

Abstract

The present disclosure provides a dual-frequency antenna and an electronic device, and belongs to the technical field of communication. The dual-frequency antenna comprises a first antenna unit and a second antenna unit arranged oppositely, and a filter unit arranged between the first antenna unit and the second antenna unit. The working frequency of the first antenna unit is a first frequency band; the working frequency of the second antenna unit is a second frequency band; the filter unit is configured to reflect electromagnetic waves of the first frequency band and transmit electromagnetic waves of the second frequency band; the first antenna unit is configured to receive electromagnetic waves of the first frequency band and reflect the received electromagnetic waves of the first frequency band through the filter unit; and the second antenna unit is configured to receive electromagnetic waves of the second frequency band transmitted through the filter unit and reflect the electromagnetic waves of the second frequency band.

Description

Technical Field

[0001] This disclosure belongs to the field of communication technology, specifically relating to a dual-band antenna and electronic device. Background Technology

[0002] In scenarios such as satellite communication, transmitting and receiving antennas often operate at different frequencies. To simplify the system and reduce costs, it is required that the antennas achieve a common aperture for both transmitting and receiving, i.e., be suitable for dual-frequency operation. Currently, existing dual-frequency reflector array antenna solutions often only achieve a fixed beam direction and cannot perform beam scanning. Therefore, providing a dual-frequency antenna capable of beam scanning is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide a dual-band antenna and electronic device.

[0004] In a first aspect, embodiments of this disclosure provide a dual-band antenna, which includes a first antenna unit and a second antenna unit disposed opposite to each other, and a filtering unit disposed between the first antenna unit and the second antenna unit; wherein, the operating frequency of the first antenna unit is a first frequency band; and the operating frequency of the second antenna unit is a second frequency band.

[0005] The filtering unit is configured to reflect electromagnetic waves of the first frequency band and transmit electromagnetic waves of the second frequency band.

[0006] The first antenna unit is configured to receive electromagnetic waves of the first frequency band and reflect the received electromagnetic waves of the first frequency band through the filtering unit.

[0007] The second antenna unit is configured to receive electromagnetic waves of the second frequency band transmitted through the filter unit and to reflect electromagnetic waves of the second frequency band.

[0008] Wherein, the first antenna element includes at least one first subarray; the second antenna includes at least one second subarray;

[0009] The first subarray includes a first dielectric substrate and a second dielectric substrate disposed opposite to each other, a first phase adjustment structure disposed between the first dielectric substrate and the second dielectric substrate, and a first radiating portion disposed on the first dielectric substrate; the filtering unit is disposed on the side of the second dielectric substrate away from the first dielectric substrate; the first phase adjustment structure is electrically connected to the first radiating portion and is configured to adjust the phase of the electromagnetic wave of the first frequency band received by the first radiating portion, and radiate the phase-shifted electromagnetic wave through the first radiating portion.

[0010] The second subarray includes a third dielectric substrate and a fourth dielectric substrate disposed opposite to each other, a second phase adjustment structure disposed between the third dielectric substrate and the fourth dielectric substrate, a second radiating portion disposed on the third dielectric substrate, and a reference electrode layer disposed on the side of the fourth dielectric substrate opposite to the third dielectric substrate; the third dielectric substrate is disposed on the side of the filtering unit opposite to the second dielectric substrate; the second phase adjustment structure is electrically connected to the second radiating portion and is configured to adjust the phase of the electromagnetic wave of the second frequency band received by the second radiating portion, and radiate the phase-shifted electromagnetic wave through the second radiating portion.

[0011] The first subarray and the second subarray have no overlap in their orthographic projections onto the plane where the filter unit is located.

[0012] The number of the first subarray and the second subarray are both multiple, and the number of the first subarray is less than the number of the second subarray; the first subarray and the second subarray are arranged in an array, and the orthographic projection of one second subarray on the plane where the filter unit is located covers the orthographic projection of at least one first subarray on the plane where the filter unit is located.

[0013] The first phase adjustment structure includes a first power supply section and a first phase shifting section electrically connected to the first power supply section; the first power supply section is also electrically connected to the first radiation section; the first phase shifting section includes a first electrode layer disposed on the side of the first dielectric substrate near the second dielectric substrate, a second electrode layer disposed on the side of the second dielectric substrate near the first dielectric substrate, and a first adjustable dielectric layer disposed between the first electrode layer and the second electrode layer.

[0014] The first subarray further includes a first driving signal line and a second driving signal line; the first driving signal line is electrically connected to the first electrode layer; and the second driving signal line is electrically connected to the second electrode layer.

[0015] In one of the first subarrays, the first radiating part is located on the side of the first dielectric substrate opposite to the first phase adjustment structure, and the first radiating part is electrically connected to the first feeding part through a first via penetrating the first dielectric substrate.

[0016] In one of the first subarrays, the first radiating portion is located on the side of the first dielectric substrate opposite to the first phase adjustment structure, and the first radiating portion and the orthogonal projection of the first feeding portion on the first dielectric substrate at least partially overlap.

[0017] The second phase adjustment structure includes a second power supply section and a second phase shifting section electrically connected to the second power supply section; the second power supply section is also electrically connected to the second radiation section; the second phase shifting section includes a third electrode layer disposed on the side of the third dielectric substrate near the fourth dielectric substrate, a fourth electrode layer disposed on the side of the fourth dielectric substrate near the third dielectric substrate, and a second adjustable dielectric layer disposed between the third electrode layer and the fourth electrode layer.

[0018] The second subarray further includes a third driving signal line and a fourth driving signal line; the third driving signal line is electrically connected to the third electrode layer; and the fourth driving signal line is electrically connected to the fourth electrode layer.

[0019] In one of the second subarrays, the second radiating part is located on the side of the third dielectric substrate opposite to the second phase adjustment structure, and the second radiating part is electrically connected to the second feeding part through a second via penetrating the third dielectric substrate.

[0020] In one of the second subarrays, the second radiating part is located on the side of the third dielectric substrate opposite to the second phase adjustment structure, and the orthogonal projection of the second radiating part and the second feeding part on the third dielectric substrate at least partially overlaps.

[0021] The number of first subarrays is multiple, and the first and second dielectric substrates of each first subarray are shared; the number of second subarrays is multiple, and the third and fourth dielectric substrates of each second subarray are shared.

[0022] The reference electrode layer includes a reflective layer.

[0023] The filtering unit includes multiple patterning units, which are patches and / or rings.

[0024] Secondly, embodiments of this disclosure provide an electronic device that includes any of the dual-band antennas described above. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a dual-band antenna according to an embodiment of the present disclosure.

[0026] Figure 2 This is a partial cross-sectional view of a dual-band antenna according to an embodiment of the present invention.

[0027] Figure 3 This is a top view of the first phase shifter in the first subarray of an embodiment of this disclosure.

[0028] Figure 4 for Figure 3 A cross-sectional view of AA'.

[0029] Figure 5 for Figure 3 A cross-sectional view of BB'.

[0030] Figure 6 This is a top view of the second phase shifter in the second subarray of an embodiment of this disclosure.

[0031] Figure 7 for Figure 6 A cross-sectional view of CC'.

[0032] Figure 8 for Figure 6 Cross-sectional view of DD'.

[0033] Figure 9 This is a schematic diagram illustrating the correspondence between a first subarray and a second subarray according to an embodiment of this disclosure.

[0034] Figure 10 This is a schematic diagram illustrating the correspondence between the first subarray and the second subarray in another embodiment of this disclosure.

[0035] Figure 11 This is a schematic diagram of the patterned elements of the frequency selection surface of a dual-band antenna according to an embodiment of the present disclosure. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0038] Before describing the technical solutions of the embodiments of this disclosure, it should be noted that the filtering unit in the embodiments of this disclosure includes, but is not limited to, a frequency selective surface. In the following description, only the example of a filtering unit using a frequency selective surface is used.

[0039] Firstly, Figure 1 This is a schematic diagram of the structure of a dual-band antenna according to an embodiment of the present disclosure; as shown Figure 1 As shown, this embodiment of the present disclosure provides a dual-band antenna, which includes a first antenna element 1 and a second antenna element 2 disposed opposite to each other, and a frequency selection surface 3 disposed between the first antenna element 1 and the second antenna element 2. The operating frequency of the first antenna element 1 is a first frequency band; the operating frequency of the second antenna element 2 is a second frequency band. For example, the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band, that is, compared with the second frequency band, the first frequency band is high frequency and the second frequency band is low frequency. Accordingly, the first antenna element 1 is a high-frequency antenna and the second antenna element 2 is a low-frequency antenna. In this embodiment of the present disclosure, only the example of the first antenna element 1 being a high-frequency antenna and the second antenna element 2 being a low-frequency antenna is used for explanation.

[0040] In this embodiment of the present disclosure, the frequency selective surface 3 is configured to reflect electromagnetic waves of a first frequency band and transmit electromagnetic waves of a second frequency band. A first antenna unit 1 is configured to receive electromagnetic waves of the first frequency band and reflect the received electromagnetic waves of the first frequency band via the frequency selective surface 3; a second antenna unit 2 is configured to receive electromagnetic waves of the second frequency band transmitted via the frequency selective surface 3 and reflect the electromagnetic waves of the second frequency band.

[0041] In this embodiment, the frequency selective surface 3 is configured to reflect high-frequency electromagnetic waves and transmit low-frequency electromagnetic waves. Therefore, the frequency selective surface 3 is equivalent to a low-pass filter. It performs total reflection of electromagnetic waves in the high-frequency antenna and acts as the grounding layer of the high-frequency antenna. For the transmission of low-frequency electromagnetic waves, it does not affect the absorption of low-frequency electromagnetic waves by the low-frequency antenna, thus forming an antenna that achieves beam scanning for dual-frequency operation. This type of antenna can operate at different frequencies and has a simple structure and low cost.

[0042] In some examples, Figure 2 This is a partial cross-sectional view of a dual-band antenna according to an embodiment of the present invention; as shown. Figure 1 and 2As shown, the first antenna element 1 includes at least one first subarray 10. In this embodiment, the number of first subarrays 10 is multiple. For example, the first antenna element 1 includes N×N first subarrays 10, where N≥2 and N is an integer. Each subarray may include a first dielectric substrate 11 and a second dielectric substrate 12 disposed opposite to each other, a first phase adjustment structure 13 disposed between the first dielectric substrate 11 and the second dielectric substrate 12, and a first radiating portion 14 disposed on the first dielectric substrate 11; the first phase adjustment structure 13 is electrically connected to the first radiating portion 14, and the first phase adjustment structure 13 is configured to adjust the phase of the electromagnetic wave of the first frequency band received by the first radiating portion 14, and radiate the phase-shifted electromagnetic wave through the first radiating portion 14.

[0043] Furthermore, the frequency selective surface 3 is disposed on the side of the second dielectric substrate 12 near the second antenna element 2, and this frequency selective surface 3 is equivalent to the ground electrode layer of the first antenna element 1. For example, the frequency selective surface 3 is formed on the side of the second dielectric substrate 12 away from the first phase adjustment structure 13, and the frequency selective surface 3 includes M×M patterned units 31. The patterned units 31 can be arranged in a one-to-one correspondence with the first subarray 10, that is, the number of patterned units 31 is equal to the number of the first subarray 10 (M=N). Of course, the number of patterned units 31 of the frequency selective surface 3 can also be different from the number of the first subarray 10. For example, multiple first subarrays 10 arranged in an array correspond to one patterned unit 31, or one patterned unit 31 corresponds to one first subarray 10, and the number of patterned units 31 is greater than the number of first subarrays 10.

[0044] In some examples, continue to refer to Figure 1 and 2The second antenna unit 2 includes at least one second subarray 20. In this embodiment, the number of first subarrays 10 is taken as an example. For example, the first antenna unit 1 includes P × P first subarrays 10, where P ≥ 2, and P is an integer. Furthermore, since in this embodiment, the first frequency band is high-frequency and the second frequency band is low-frequency, the size of the second subarray 20 is larger than the size of the first subarray 10, and the number of second subarrays 20 is less than the number of first subarrays 10, i.e., P < N. However, the number M of the patterned units 31 on the frequency selective surface 3 is not necessarily equal to P. Each second subarray 20 may include a third dielectric substrate 21 and a fourth dielectric substrate 22 disposed opposite to each other, a second phase adjustment structure 23 disposed between the third dielectric substrate 21 and the fourth dielectric substrate 22, a second radiating portion 24 disposed on the third dielectric substrate 21, and a reference electrode layer 25 disposed on the side of the fourth dielectric substrate 22 opposite to the second phase adjustment structure 23, the reference electrode layer 25 serving as a reflective layer. The third dielectric substrate 21 is located on the side of the frequency selective surface 3 opposite to the first antenna unit 1. The second phase adjustment structure 23 is electrically connected to the second radiating section 24 and configured to phase-shift the electromagnetic wave of the second frequency band received by the second radiating section 24, and radiate the phase-shifted electromagnetic wave through the second radiating section 24. The reference electrode layer 25 includes, but is not limited to, a ground layer; in this embodiment, the reference electrode layer 25 is taken as a ground layer.

[0045] In some examples, both the first phase adjustment structure 13 and the second phase adjustment structure 23 can be phase shifters. For ease of distinction between the first phase adjustment structure 13 and the second phase adjustment structure 23, the phase shifter used as the first phase adjustment structure 13 is referred to as the first phase shifter, and the phase shifter used as the second phase adjustment structure 23 is referred to as the second phase shifter. In this embodiment, both the first and second phase shifters can be single-line phase shifters or differential dual-line phase shifters. In this embodiment, it is taken as an example where both the first and second phase shifters are differential phase shifters. The first adjustable dielectric layer in the first phase shifter and the second adjustable dielectric layer in the second phase shifter include, but are not limited to, liquid crystal layers. In this embodiment, it is taken as an example where both the first and second adjustable dielectric layers are liquid crystal layers. For ease of description, the liquid crystal layer used as the first adjustable dielectric layer is referred to as the first liquid crystal layer 133, and the liquid crystal layer used as the second adjustable dielectric layer is referred to as the second liquid crystal layer 233.

[0046] Figure 3 This is a top view of the first phase shifter in the first subarray 10 of this embodiment; Figure 4 for Figure 3 The cross section of AA'; Figure 5 for Figure 3 The cross-section of BB'; such as Figure 3-5As shown, the first phase shifter includes a first feed section 131 and a first phase shifting section 132 electrically connected to the first feed section 131. The first feed section 131 is also electrically connected to the first radiating section 14. The first phase shifting section 132 includes a first electrode layer disposed on the side of the first dielectric substrate 11 near the second dielectric substrate 12, a second electrode layer disposed on the side of the second dielectric substrate 12 near the second dielectric substrate 12, and a first liquid crystal layer 133 disposed between the first electrode layer and the second electrode layer. For example, the first electrode layer includes a first trunk line 1321 and a plurality of first branches 1322 connected in the extension direction of the first trunk line 1321 and arranged side-by-side. The second electrode layer includes a second trunk line 1323 and a plurality of second branches 1324 connected in the extension direction of the second trunk line 1323 and arranged side-by-side. The orthographic projections of one first branch 1322 and one second branch 1324 on the first dielectric substrate 11 at least partially overlap. In one example, both the first main line 1321 and the second main line 1323 include a first end and a second end disposed opposite to each other; the first power supply section 131 is disposed on the first dielectric substrate 11, and the first power supply section 131 can be a 1-to-2 power divider, which includes a first main circuit 1311 and a first branch circuit 1312 and a second branch circuit 1313 connected to the first main circuit 1311; the first branch circuit 1312 is directly connected to the first end of the first main line 1321, and the second branch circuit 1313 is coupled to the first end of the second main line 1323 (that is, the first ends of the second branch circuit 1313 and the first main line 1323 at least partially overlap in orthographic projection on the first dielectric substrate 11). The first main circuit 1311 is electrically connected to the first radiating section 14. For example, if the first radiating part 14 is disposed on the side of the first dielectric substrate 11 close to the first liquid crystal layer 133, the first radiating part 14 is directly electrically connected to the first main circuit 1311. If the first radiating part 14 is disposed on the side of the first dielectric substrate 11 away from the first liquid crystal layer 133, the first radiating part 14 is electrically connected to the first main circuit 1311 through a first via penetrating the first dielectric substrate 11, or the first radiating part 14 and the first main circuit 1311 are coupled (that is, the first radiating part 14 and the first main circuit 1311 at least partially overlap in orthographic projection on the first dielectric substrate 11).

[0047] It should be noted that both electromagnetic wave input and output are achieved by the first main path 1311 of the first feed section 131. Therefore, it should be understood that matching impedances are provided at the second end of the first main line 1321 and the second end of the second main line 1323 to reduce transmission loss.

[0048] In some examples, when the first antenna element 1 includes the aforementioned first phase shifter, each first subarray 10 may include not only the aforementioned structure but also a first driving signal line and a second driving signal line. The first driving signal line is electrically connected to the first electrode layer, for example, the first driving signal line is electrically connected to the first main line 1321, and the second driving signal line is connected to the second electrode layer, for example, the second driving signal line is electrically connected to the second main line 1323. A first voltage is applied to the first main line 1321 through the first driving signal line, and a second voltage is applied to the second main line 1323 through the second driving signal line. Through the first and second voltages, an electric field is formed between the first branch 1322 and the second branch 1324, thereby causing the liquid crystal molecules in the first liquid crystal layer 133 to deflect, thus changing the dielectric constant of the first liquid crystal layer 133 and achieving phase shifting of the electromagnetic wave. The first driving signal line and the second driving signal line can be respectively disposed on the first dielectric substrate 11 and the second dielectric substrate 12. At this time, the second driving signal line disposed on the second dielectric substrate 12 extends to the peripheral area of ​​the second dielectric substrate 12, and is electrically connected to the first lead located on the first dielectric substrate 11 through conductive gold balls. Then, the first lead and the first driving signal line are respectively bonded to the corresponding connection pads, and finally bonded to the printed circuit board integrating the first driving chip.

[0049] Figure 6 This is a top view of the second phase shifter in the second subarray 20 of this embodiment; Figure 7 for Figure 6 The cross section of CC'; Figure 8 for Figure 6 The cross section of DD'; such as Figure 6-8As shown, the second phase shifter includes a second feed section 231 and a second phase shifting section 232 electrically connected to the second feed section 231. The second feed section 231 is also electrically connected to the second radiating section 24. The second phase shifting section 232 includes a third electrode layer disposed on the side of the third dielectric substrate 21 near the fourth dielectric substrate 22, a fourth electrode layer disposed on the side of the fourth dielectric substrate 22 near the third dielectric substrate 21, and a second liquid crystal layer 233 disposed between the third electrode layer and the fourth electrode layer. For example, the third electrode layer includes a third trunk line 2321 and a plurality of third branches 2322 connected in the extension direction of the third trunk line 2321 and arranged side-by-side. The fourth electrode layer includes a fourth trunk line 2323 and a plurality of fourth branches 2324 connected in the extension direction of the fourth trunk line 2323 and arranged side-by-side. The orthographic projections of one third branch 2322 and one fourth branch 2324 on the third dielectric substrate 21 at least partially overlap. In one example, both the third main line 2321 and the fourth main line 2323 include a first end and a second end disposed opposite to each other; the second power supply section 231 is disposed on the third dielectric substrate 21, and the second power supply section can be a 1-to-2 power divider, which includes a second main line 2311 and a third branch line 2312 and a fourth branch line 2313 connected to the second main line 2311; the third branch line 2312 is directly connected to the first end of the second main line 2323, and the fourth branch line 2313 is coupled to the first end of the fourth main line 2323 (that is, the first ends of the fourth branch line 2313 and the fourth main line 2323 at least partially overlap in orthographic projection on the third dielectric substrate 21). The second main line 2311 is electrically connected to the second radiating section 24. For example, if the second radiating part 24 is disposed on the side of the third dielectric substrate 21 close to the second liquid crystal layer 233, the second radiating part 24 is directly electrically connected to the second main path 2311. If the second radiating part 24 is disposed on the side of the third dielectric substrate 21 away from the second liquid crystal layer 233, the second radiating part 24 is electrically connected to the second main path 2311 through a fourth via penetrating the third dielectric substrate 21, or the second radiating part 24 and the second main path 2311 are coupled (that is, the second radiating part 24 and the second main path 2311 at least partially overlap in orthographic projection on the third dielectric substrate 21).

[0050] It should be noted that both electromagnetic wave input and output are achieved by the second main path 2311 of the second feed section 231. Therefore, it should be understood that matching impedances are provided at the second ends of the third main line 2321 and the fourth main line 2323 to reduce transmission loss. If the second radiating section 24 is disposed on the side of the third dielectric substrate 21 away from the second liquid crystal layer 233, since the frequency selection surface 3 is a conductive structure, an insulating layer is provided between the layer where the frequency selection surface 3 is located and the layer where the second radiating section 24 is located.

[0051] In some examples, when the second antenna unit 2 includes the aforementioned second phase shifter, each second subarray 20 may include not only the aforementioned structure but also a third driving signal line and a fourth driving signal line. The third driving signal line is electrically connected to the third electrode layer, for example, the third driving signal line is electrically connected to the third main line 2321, and the fourth driving signal line is connected to the fourth electrode layer, for example, the fourth driving signal line is electrically connected to the fourth main line 2323. A third voltage is applied to the third main line 2321 through the third driving signal line, and a fourth voltage is applied to the fourth main line 2323 through the fourth driving signal line. Through the third and fourth voltages, an electric field is formed between the third branch 2322 and the fourth branch 2324, thereby causing the liquid crystal molecules in the second liquid crystal layer 233 to deflect, thus changing the dielectric constant of the second liquid crystal layer 233 and achieving phase shifting of the electromagnetic wave. The third driving signal line and the fourth driving signal line can be respectively disposed on the third dielectric substrate 21 and the fourth dielectric substrate 22. At this time, the fourth driving signal line disposed on the fourth dielectric substrate 22 extends to the peripheral area of ​​the fourth dielectric substrate 22, and is electrically connected to the second lead located on the third dielectric substrate 21 through conductive gold balls. Then, the second lead and the third driving signal line are respectively bonded to the corresponding connection pads, and finally bonded to the printed circuit board integrating the second driving chip.

[0052] It should be noted that the above is only an exemplary structure of a phase shifter, but the phase shifter in the embodiments of this disclosure is not limited to this. Various forms of phase shifters can be applied in the antennas of the embodiments of this disclosure, and they will not be listed one by one here.

[0053] In some examples, the dimensions of the first radiating part 14 and the second radiating part 24 are related to the operating frequencies of the first antenna element 1 and the second antenna element 2, and the size (area) of the second radiating part 24 is larger than the size (area) of the first radiating part 14. The dimensions of the first radiating part 14 and the second radiating part 24 respectively determine the dimensions of the first antenna element 1 and the second antenna element 2. In the figures of the embodiments of this disclosure, the orthographic projection of the first radiating part 14 on the first dielectric substrate 11 covers the orthographic projection of the first phase adjustment structure 13 on the first dielectric substrate 11, and the orthographic projection of the second radiating part 24 on the first dielectric substrate 11 covers the orthographic projection of the second phase adjustment structure 23 on the first dielectric substrate 11, as an example.

[0054] Specifically, Figure 9 This is a schematic diagram illustrating the correspondence between a first subarray 10 and a second subarray 20 according to an embodiment of this disclosure; as shown... Figure 9As shown, when the operating frequencies of the first antenna element 1 and the second antenna element 2 are similar, the size difference between the first radiating part 14 and the second radiating part 24 is small. At this time, the orthographic projections of the first subarray 10 and the second subarray 20 on the plane where the frequency selection surface 3 is located do not overlap. For example, in the first antenna element 1, multiple first subarrays 10 form multiple first subarray groups arranged side by side along the second direction, and each first subarray group includes multiple first subarrays 10 arranged side by side along the first direction; in the second antenna element 2, multiple second subarrays 20 form multiple second subarray groups arranged side by side along the second direction, and each second group includes multiple second subarrays 20 arranged side by side along the first direction. The first subarray groups and the second subarray groups are arranged alternately, and the second subarrays 20 and the first subarrays 10 are staggered in the first direction.

[0055] Figure 10 This is a schematic diagram illustrating the correspondence between the first subarray 10 and the second subarray 20 in another embodiment of this disclosure; as shown... Figure 10 As shown, when the operating frequencies of the first antenna element 1 and the second antenna element 2 differ significantly, the orthographic projection of a second subarray 20 onto the plane of the frequency selection surface 3 covers the orthographic projections of multiple first subarrays 10 arranged in an array onto the plane of the frequency selection surface 3. It should be noted that not all orthographic projections of the first subarrays 10 onto the plane of the frequency selection surface 3 will be covered by the orthographic projection of the second subarray 20 onto the plane of the frequency selection surface 3. Because the orthographic projections of the second subarray 20 and the first subarray 10 onto the plane of the frequency selection surface 3 overlap, the second radiating part 24 of each second subarray 20 will be covered by the first radiating part 14. In this case, the electromagnetic waves radiated by the second radiating part 24 will be further radiated through the coupling of the first radiating part 14, thus improving the radiation efficiency of the second antenna element 2 and reducing transmission loss.

[0056] In some examples, the polarization directions of each first subarray 10 in the first antenna element 1 can be the same or different. Similarly, the polarization directions of each second subarray 20 in the second antenna element 2 can be the same or different. The polarization direction of the first subarray 10 in the first antenna element 1 can be the same as or different from the polarization direction of the second subarray 20 in the second antenna element 2. In the embodiments of this disclosure, the first antenna element 1 and the second antenna element 2 can be selected to implement beam scanning function according to different application scenarios, while the other exists as a fixed-pointing reflector. Of course, the first antenna element 1 and the second antenna element 2 can both serve as fixed-pointing reflectors or both can implement beam scanning.

[0057] In some examples, the first dielectric substrate 11 and the second dielectric substrate 12 of the first subarray 10 in the first antenna element 1 are shared, and the third dielectric substrate 21 and the fourth dielectric substrate 22 of the second subarray 20 in the second antenna element 2 are shared. This makes the structure of the first antenna element 1 and the second antenna element 2 simple and easy to implement.

[0058] In some examples, Figure 11 This is a schematic diagram of the patterned unit 31 of the frequency selection surface 3 of the dual-band antenna according to an embodiment of the present disclosure; as shown Figure 11 As shown, the frequency selection surface 3 includes multiple patterned units 31, all of which are patches and / or rings. For example, the patterned units 31 include circular rings (a), rectangular rings (b), cross-shaped rings (c), circular patches (d), square patches (e), cross-shaped patches (f), etc.

[0059] In some examples, both the first radiating part 14 and the second radiating part 24 in the embodiments of this disclosure can be radiating patches. The shape of the radiating patch can be rectangular, circular, triangular, octagonal, etc. Of course, the radiating component is not limited to radiating patches and can also be a dipole, etc. The selection of the radiating patch can be specifically set according to the requirements.

[0060] In some examples, the first dielectric substrate 11, the second dielectric substrate 12, the third dielectric substrate 21, and the fourth dielectric substrate 22 in this disclosure embodiment can be glass substrates, printed circuit boards (PCBs), etc. This disclosure embodiment does not limit the materials of the first dielectric substrate 11, the second dielectric substrate 12, the third dielectric substrate 21, and the fourth dielectric substrate 22. Secondly, this disclosure embodiment also provides an electronic device including the aforementioned dual-band antenna. The antenna system provided in the disclosure embodiment further includes a transceiver unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filtering unit. The antenna in the antenna system can serve as a transmitting antenna or a receiving antenna. The transceiver unit can include a baseband and a receiving end. The baseband provides signals in at least one frequency band, such as 2G, 3G, 4G, and 5G signals, and transmits the signals in at least one frequency band to the radio frequency transceiver. After receiving the signal, the antenna in the antenna system can transmit it to the receiving end in the first unit after processing by the filtering unit, the power amplifier, the signal amplifier, and the radio frequency transceiver. The receiving end can be, for example, a smart gateway.

[0061] Furthermore, the RF transceiver is connected to the transceiver unit and is used to modulate the signals transmitted by the transceiver unit, or to demodulate the signals received by the antenna before transmitting them to the transceiver unit. Specifically, the RF transceiver may include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives various types of signals provided by the baseband, the modulation circuit can modulate the various types of signals provided by the baseband and then send them to the antenna. The antenna receives the signals and transmits them to the receiving circuit of the RF transceiver. The receiving circuit then transmits the signals to the demodulation circuit, which demodulates the signals and transmits them to the receiving end.

[0062] Furthermore, the RF transceiver is connected to a signal amplifier and a power amplifier, which are then connected to a filtering unit. The filtering unit is connected to at least one antenna. During signal transmission, the signal amplifier improves the signal-to-noise ratio (SNR) of the RF transceiver's output signal before transmitting it to the filtering unit; the power amplifier amplifies the power of the RF transceiver's output signal before transmitting it to the filtering unit. The filtering unit may include a duplexer and a filtering circuit. The filtering unit combines the signals output from the signal amplifier and power amplifier, filters out clutter, and transmits them to the antenna, which then radiates the signal. During signal reception, the antenna receives the signal and transmits it to the filtering unit. The filtering unit filters out clutter from the received signal before transmitting it to the signal amplifier and power amplifier. The signal amplifier increases the gain of the received signal, improving the SNR; the power amplifier amplifies the power of the received signal. The received signal is then processed by the power amplifier and signal amplifier before being transmitted to the RF transceiver, which in turn transmits it to the transceiver unit.

[0063] In some examples, the signal amplifier may include various types of signal amplifiers, such as low-noise amplifiers, without limitation.

[0064] In some examples, the electronic device provided in this disclosure also includes a power management unit connected to a power amplifier and providing the power amplifier with a voltage for amplifying signals.

[0065] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A dual-band antenna comprising a first antenna element and a second antenna element arranged opposite to each other, and a filter element arranged between the first antenna element and the second antenna element; wherein, The first antenna element operates at a frequency in the first frequency band; the second antenna element operates at a frequency in the second frequency band. The filtering unit is configured to reflect electromagnetic waves of the first frequency band and transmit electromagnetic waves of the second frequency band. The first antenna unit is configured to receive electromagnetic waves of the first frequency band and reflect the received electromagnetic waves of the first frequency band through the filtering unit. The second antenna unit is configured to receive electromagnetic waves of the second frequency band transmitted through the filtering unit and to reflect electromagnetic waves of the second frequency band. The first antenna element includes at least one first subarray; the second antenna element includes at least one second subarray; The first subarray includes a first dielectric substrate and a second dielectric substrate disposed opposite to each other, a first phase adjustment structure disposed between the first dielectric substrate and the second dielectric substrate, and a first radiating portion disposed on the first dielectric substrate. The filtering unit is disposed on the side of the second dielectric substrate away from the first dielectric substrate; the first phase adjustment structure is electrically connected to the first radiating part and is configured to adjust the phase of the electromagnetic wave of the first frequency band received by the first radiating part, and radiate the phase-shifted electromagnetic wave through the first radiating part. The second subarray includes a third dielectric substrate and a fourth dielectric substrate disposed opposite to each other, a second phase adjustment structure disposed between the third dielectric substrate and the fourth dielectric substrate, a second radiating portion disposed on the third dielectric substrate, and a reference electrode layer disposed on the side of the fourth dielectric substrate opposite to the third dielectric substrate. The third dielectric substrate is disposed on the side of the filter unit away from the second dielectric substrate; the second phase adjustment structure is electrically connected to the second radiating part and is configured to adjust the phase of the electromagnetic wave of the second frequency band received by the second radiating part, and radiate the phase-shifted electromagnetic wave through the second radiating part.

2. The dual-band antenna of claim 1, wherein, The orthographic projections of the first subarray and the second subarray onto the plane where the filter unit is located do not overlap.

3. The dual-band antenna according to claim 1, wherein, There are multiple first subarrays and multiple second subarrays, and the number of first subarrays is less than the number of second subarrays; both the first subarrays and the second subarrays are arranged in an array, and the orthographic projection of one second subarray onto the plane where the filter unit is located covers the orthographic projection of at least one first subarray onto the plane where the filter unit is located.

4. The dual-band antenna according to any one of claims 1-3, wherein, The first phase adjustment structure includes a first power supply section and a first phase shifting section electrically connected to the first power supply section; the first power supply section is also electrically connected to the first radiation section; the first phase shifting section includes a first electrode layer disposed on the side of the first dielectric substrate near the second dielectric substrate, a second electrode layer disposed on the side of the second dielectric substrate near the first dielectric substrate, and a first adjustable dielectric layer disposed between the first electrode layer and the second electrode layer.

5. The dual-frequency antenna according to claim 4, wherein, The first subarray further includes a first driving signal line and a second driving signal line; the first driving signal line is electrically connected to the first electrode layer; and the second driving signal line is electrically connected to the second electrode layer.

6. The dual-band antenna according to claim 4, wherein, For one of the first subarrays, the first radiating portion is located on the side of the first dielectric substrate opposite to the first phase adjustment structure, and the first radiating portion is electrically connected to the first feeding portion through a first via penetrating the first dielectric substrate.

7. The dual-band antenna according to claim 4, wherein, For one of the first subarrays, the first radiating portion is located on the side of the first dielectric substrate opposite to the first phase adjustment structure, and the first radiating portion and the orthogonal projection of the first feeding portion on the first dielectric substrate at least partially overlap.

8. The dual-band antenna according to any one of claims 1-3, wherein, The second phase adjustment structure includes a second power supply section and a second phase shifting section electrically connected to the second power supply section; the second power supply section is also electrically connected to the second radiation section; the second phase shifting section includes a third electrode layer disposed on the side of the third dielectric substrate near the fourth dielectric substrate, a fourth electrode layer disposed on the side of the fourth dielectric substrate near the third dielectric substrate, and a second adjustable dielectric layer disposed between the third electrode layer and the fourth electrode layer.

9. The dual-band antenna according to claim 8, wherein, The second subarray further includes a third driving signal line and a fourth driving signal line; the third driving signal line is electrically connected to the third electrode layer; and the fourth driving signal line is electrically connected to the fourth electrode layer.

10. The dual-frequency antenna according to claim 8, wherein, For one of the second subarrays, the second radiating part is located on the side of the third dielectric substrate opposite to the second phase adjustment structure, and the second radiating part is electrically connected to the second feed part through a second via penetrating the third dielectric substrate.

11. The dual-band antenna according to claim 8, wherein, For one of the second subarrays, the second radiating portion is located on the side of the third dielectric substrate opposite to the second phase adjustment structure, and the orthogonal projection of the second radiating portion onto the third dielectric substrate at least partially overlaps with that of the second feeding portion.

12. The dual-band antenna according to any one of claims 1-3, wherein, There are multiple first subarrays, and the first and second dielectric substrates of each first subarray are shared; there are multiple second subarrays, and the third and fourth dielectric substrates of each second subarray are shared.

13. The dual-band antenna according to any one of claims 1-3, wherein, The reference electrode layer includes a reflective layer.

14. The dual-band antenna according to any one of claims 1-3, wherein, The filtering unit includes multiple patterning units, which are patches and / or rings.

15. An electronic device comprising a dual-band antenna according to any one of claims 1-14.

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