Dual-frequency antenna and electronic device

Abstract

The present disclosure provides a dual-frequency antenna and an electronic device, belonging to the field of communication technologies. The dual-frequency antenna of the present disclosure includes a first antenna unit and a second antenna unit arranged opposite to each other, and a filter unit arranged between the first antenna unit and the second antenna unit. The operating frequency of the first antenna unit is a first frequency band, the operating frequency of the second antenna unit is a second frequency band, the filter unit is arranged to reflect electromagnetic waves in the first frequency band and transmit electromagnetic waves in the second frequency band. The first antenna unit is arranged to receive electromagnetic waves in the first frequency band and reflect the received electromagnetic waves in the first frequency band by the filter unit. The second antenna unit is arranged to receive the electromagnetic waves in the second frequency band that have passed through the filter unit and reflect the electromagnetic waves in the second frequency band.

Description

Technical Field

[0001] The present disclosure belongs to the field of communication technologies, and specifically relates to a dual-frequency antenna and an electronic device.

Background Art

[0002] In scenarios such as satellite communication, transmitting antennas and receiving antennas often operate at different frequencies. Considering system simplification and cost reduction, antennas are required to achieve a transmit-receive shared aperture, that is, to be applicable to operation at two frequencies. Currently, the conventional dual-frequency reflective array antenna solution can only achieve fixed beam pointing and cannot perform beam scanning. Therefore, it is an urgent technical problem to be solved to provide a dual-frequency antenna that can achieve beam scanning.

Summary of the Invention

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

[0004] In a first aspect, an embodiment of the present disclosure includes a first antenna unit and a second antenna unit installed opposite to each other, and a filter unit installed between the first antenna unit and the second antenna unit. 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. The filter unit is arranged to reflect electromagnetic waves in the first frequency band and transmit electromagnetic waves in the second frequency band. The first antenna unit is arranged to receive electromagnetic waves in the first frequency band and reflect the received electromagnetic waves in the first frequency band by the filter unit. The second antenna unit is arranged to receive electromagnetic waves in the second frequency band that have passed through the filter unit and reflect the electromagnetic waves in the second frequency band, thereby providing a dual-frequency antenna.

[0005] Here, the first antenna unit includes at least one first sub-array, and the second antenna unit includes at least one second sub-array. The first sub-array includes a first dielectric substrate and a second dielectric substrate arranged opposite to each other, a first phase adjustment structure installed between the first dielectric substrate and the second dielectric substrate, and a first radiation unit installed on the first dielectric substrate. The filter unit is provided on a side of the second dielectric substrate away from the first dielectric substrate. The first phase adjustment structure is electrically connected to the first radiation unit, and is arranged to adjust the phase of the electromagnetic wave in the first frequency band received by the first radiation unit and radiate the phase-shifted electromagnetic wave by the first radiation unit. The second sub-array includes a third dielectric substrate and a fourth dielectric substrate arranged opposite to each other, a second phase adjustment structure installed between the third dielectric substrate and the fourth dielectric substrate, a second radiation unit installed on the third dielectric substrate, and a reference electrode layer installed on a side of the fourth dielectric substrate away from the third dielectric substrate. The third dielectric substrate is provided on a side of the filter unit away from the second dielectric substrate. The second phase adjustment structure is electrically connected to the second radiation unit, and is arranged to adjust the phase of the electromagnetic wave in the second frequency band received by the second radiation unit and radiate the phase-shifted electromagnetic wave by the second radiation unit.

[0006] Here, the first sub-array and the second sub-array do not overlap in the orthographic projection on the plane where the filter unit is located.

[0007] Here, the numbers of both the first sub-array and the second sub-array are plural, the number of the first sub-array is less than the number of the second sub-array, both the first sub-array and the second sub-array are arranged in an array, and the orthographic projection on the plane where the filter unit of one of the second sub-arrays is located covers the orthographic projection on the plane where the filter unit of at least one of the first sub-arrays is located.

[0008] Here, the first phase adjustment structure includes a first power feeding portion and a first phase shifter electrically connected to the first power feeding portion. The first power feeding portion is further electrically connected to the first radiation portion. The first phase shifter includes a first electrode layer provided on a side of the first dielectric substrate close to the second substrate, a second electrode layer provided on a side of the second dielectric substrate close to the first dielectric substrate, and a first adjustable dielectric layer provided between the first electrode layer and the second electrode layer.

[0009] Here, the first sub-array further includes a first drive signal line and a second drive signal line. The first drive signal line is electrically connected to the first electrode layer, and the second drive signal line is electrically connected to the second electrode layer.

[0010] Here, for one of the first sub-arrays, the first radiation portion is located on a side of the first dielectric substrate away from the first phase adjustment structure, and the first radiation portion is electrically connected to the first power feeding portion through a first via hole penetrating the first dielectric substrate.

[0011] Here, for one of the first sub-arrays, the first radiation portion is located on a side of the first dielectric substrate away from the first phase adjustment structure, and the orthographic projections of the first radiation portion and the first power feeding portion on the first dielectric substrate at least partially overlap.

[0012] Here, the second phase adjustment structure includes a second power feeding portion and a second phase shifter electrically connected to the second power feeding portion. The second power feeding portion is further electrically connected to the second radiation portion. The second phase shifter includes a third electrode layer provided on a side of the third dielectric substrate close to the fourth substrate, a fourth electrode layer provided on a side of the fourth dielectric substrate close to the third dielectric substrate, and a second adjustable dielectric layer provided between the third electrode layer and the fourth electrode layer.

[0013] Here, the second sub-array further includes a third drive signal line and a fourth drive signal line. The third drive signal line is electrically connected to the third electrode layer, and the fourth drive signal line is electrically connected to the fourth electrode layer.

[0014] Here, for one of the second sub-arrays, the second radiation part is located on the side away from the second phase adjustment structure of the third dielectric substrate, and the second radiation part is electrically connected to the second power supply part through a second via hole penetrating the third dielectric substrate.

[0015] Here, for one of the second sub-arrays, the second radiation part is located on the side away from the second phase adjustment structure of the third dielectric substrate, and the orthographic projections of the second radiation part and the second power supply part on the third dielectric substrate at least partially overlap.

[0016] Here, the number of the first sub-arrays is plural, the first dielectric substrate and the second dielectric substrate of each first sub-array are both shared, the number of the second sub-arrays is plural, and the third dielectric substrate and the fourth dielectric substrate of each second sub-array are both shared.

[0017] Here, the reference electrode layer includes a reflective layer.

[0018] Here, the filter unit includes a plurality of patterning units, and the plurality of patterning units are patches and / or rings.

[0019] In a second aspect, an embodiment of the present disclosure provides an electronic device including the dual-frequency antenna described in any one of the above.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0021] In order for 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 in combination with the drawings and specific embodiments.

[0022] Unless otherwise defined, technical terms or scientific terms used in this disclosure should be understood to have the ordinary meanings understood by those of ordinary skill in the art. The terms "first", "second" and similar terms used in this disclosure do not represent any order, quantity or importance, but are merely used to distinguish different structural parts. Similarly, similar terms such as "one", "a", or "said" do not represent a quantity limitation, but represent that there is at least one. Similar terms such as "including" or "containing" indicate that the member or object before the term includes the member or object listed after the term and those equivalent to it, but do not exclude other members or objects. Similar terms such as "connected" or "linked" are not limited to physical or mechanical connections, and may include electrical connections whether direct or indirect. Terms such as "above", "below", "left", "right" merely represent relative positional relationships, and if the absolute position of the object to be described is changed, the relative positional relationship may also change accordingly.

[0023] Before explaining the technical solutions of the embodiments of this disclosure, it should be noted that the filter unit in the embodiments of this disclosure includes but is not limited to a frequency selective surface. In the following description, only the case where the filter unit uses a frequency selective surface will be taken as an example for explanation.

[0024] In a first aspect, FIG. 1 is a schematic structural diagram of a two - frequency antenna according to an embodiment of the present disclosure. As shown in FIG. 1, an embodiment of the present disclosure provides a two - frequency antenna including a first antenna unit 1 and a second antenna unit 2 installed opposite to each other, and a frequency - selective surface 3 installed between the first antenna unit 1 and the second antenna unit 2. The operating frequency of the first antenna unit 1 is a first frequency band, and the operating frequency of the second antenna unit 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, when comparing the first frequency band and the second frequency band, the first frequency band is a high - frequency band, the second frequency band is a low - frequency band, the corresponding first antenna unit 1 is a high - frequency antenna, and the second antenna unit 2 is a low - frequency antenna. In the embodiment of the present disclosure, only the case where the first antenna unit 1 is a high - frequency antenna and the second antenna unit 2 is a low - frequency antenna will be taken as an example for explanation.

[0025] In the embodiment of the present disclosure, the frequency - selective surface 3 is arranged to reflect electromagnetic waves in the first frequency band and transmit electromagnetic waves in the second frequency band. The first antenna unit 1 is arranged to receive electromagnetic waves in the first frequency band and reflect the received electromagnetic waves in the first frequency band by the frequency - selective surface 3. The second antenna unit 2 is arranged to receive electromagnetic waves in the second frequency band that have passed through the frequency - selective surface 3 and reflect the electromagnetic waves in the second frequency band.

[0026] In the embodiments of the present disclosure, since the frequency selective surface 3 is arranged to reflect high-frequency electromagnetic waves and transmit low-frequency electromagnetic waves, the frequency selective surface 3 corresponds to a low-pass filter, totally reflects electromagnetic waves in a high-frequency antenna, and functions as a ground layer of the high-frequency antenna. Regarding the transmission of low-frequency electromagnetic waves, it does not affect the absorption of low-frequency electromagnetic waves by the low-frequency antenna, forming an antenna that realizes beam scanning operating at two frequencies. The antenna can operate at different frequencies, has a simple structure, and low cost. In some examples, FIG. 2 is a partial cross-sectional view of a two-frequency antenna according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the first antenna unit 1 includes at least one first sub-array 10. In the embodiments of the present disclosure, it is exemplified that the number of the first sub-arrays 10 is plural. For example, the first antenna unit 1 includes N×N first sub-arrays 10, where N≧2 and N is an integer. Any sub-array includes a first dielectric substrate 11 and a second dielectric substrate 12 arranged opposite to each other, a first phase adjustment structure 13 installed between the first dielectric substrate 11 and the second dielectric substrate 12, and a first radiation part 14 installed on the first dielectric substrate 11. The first phase adjustment structure 13 is electrically connected to the first radiation part 14, and the first phase adjustment structure 13 is arranged to adjust the phase of the electromagnetic waves in the first frequency band received by the first radiation part 14 and radiate the phase-shifted electromagnetic waves by the first radiation part 14.

[0027] Furthermore, the frequency selective surface 3 is provided on the second dielectric substrate 12 on the side closer to the second antenna unit 2, and the frequency selective surface 3 corresponds to the ground electrode layer of the first antenna unit 1. For example, the frequency selective surface 3 is formed on the second dielectric substrate 12 on the side away from the first phase adjustment structure 13, the frequency selective surface 3 includes M×M patterning units 31, and the patterning units 31 may be installed in a one-to-one correspondence with the first sub-arrays 10, that is, the number of patterning units 31 is equal to the number of the first sub-arrays 10 (M = N). Of course, the number of patterning units 31 of the frequency selective surface 3 may be different from the number of the first sub-arrays 10. For example, a plurality of first sub-arrays 10 arranged in an array correspond to one patterning unit 31, and for another example, one patterning unit 31 corresponds to one first sub-array 10, and the number of patterning units 31 is more than the number of the first sub-arrays 10.

[0028] In some examples, referring continuously to FIGS. 1 and 2, the second antenna unit 2 includes at least one second sub-array 20. In the embodiments of the present disclosure, it is taken as an example that the number of the second sub-arrays 20 is plural. For example, the second antenna unit 2 includes P×P second sub-arrays 20, where P≧2 and P is an integer. In addition, in the embodiments of the present disclosure, since the first frequency band is a high frequency and the second frequency band is a low frequency, the dimension of the second sub-array 20 is slightly larger than that of the first sub-array 10, and the number of the second sub-arrays 20 is less than that of the first sub-arrays 10, that is, P<N. Therefore, the number M of the patterning units 31 of the frequency selection surface 3 is not necessarily equal to P. Any of the second sub-arrays 20 includes a third dielectric substrate 21 and a fourth dielectric substrate 22 arranged opposite to each other, a second phase adjustment structure 23 arranged between the third dielectric substrate 21 and the fourth dielectric substrate 22, a second radiation part 24 arranged on the third dielectric substrate 21, and a reference electrode layer 25 arranged on the side of the second phase adjustment structure 23 of the fourth dielectric substrate 22 away from it. The reference electrode layer 25 functions as a reflection layer. The third dielectric substrate 21 is located on the side away from the first antenna unit 1 of the frequency selection surface 3. The second phase adjustment structure 23 is electrically connected to the second radiation part 24, and is arranged to perform phase shift on the electromagnetic wave in the second frequency band received by the second radiation part 24 and radiate the phase-shifted electromagnetic wave by the second radiation part 24. The reference electrode layer 25 includes but is not limited to a ground layer. In the embodiments of the present disclosure, it is taken as an example that the reference electrode layer 25 is a ground layer.

[0029] In some examples, both the first phase adjustment structure 13 and the second phase adjustment structure 23 may be phase shifters. For example, for the convenience of distinguishing between the first phase adjustment structure 13 and the second phase adjustment structure 23, the phase shifter with the first phase adjustment structure 13 is called the first phase shifter, and the phase shifter with the second phase adjustment structure 23 is called the second phase shifter. In the embodiments of the present disclosure, both the first phase shifter and the second phase shifter may be single-line phase shifters or differential two-line phase shifters. In the embodiments of the present disclosure, an example is given where both the first phase shifter and the second phase shifter are differential phase shifters. The first adjustable dielectric layer in the first phase shifter and the second variable dielectric layer in the second phase shifter both include, but are not limited to, liquid crystal layers. In the embodiments of the present disclosure, an example is given where both the first adjustable dielectric layer and the second adjustable dielectric layer are liquid crystal layers. For ease of explanation, the liquid crystal layer serving as the first adjustable dielectric layer is called the first liquid crystal layer 133, and the liquid crystal layer serving as the second adjustable dielectric layer is called the second liquid crystal layer 233.

[0030] FIG. 3 is a plan view of the first phase shifter in the first sub-array 10 of the embodiment of the present disclosure. FIG. 4 is a cross-section taken along the line A-A' of FIG. 3. FIG. 5 is a cross-section taken along the line B-B' of FIG. 3. As shown in FIGS. 3 to 5, the first phase shifter includes a first power supply unit 131 and a first phase shifter 132 electrically connected to the first power supply unit 131, and the first power supply unit 131 is further electrically connected to the first radiation unit 14. Here, the first phase shifting unit 132 includes a first electrode layer provided on the side of the first dielectric substrate 11 close to the second dielectric substrate 12, a second electrode layer provided on the side of the second dielectric substrate 12 close to the first dielectric substrate 11, and a first liquid crystal layer 133 provided 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 extending direction of the first trunk line 1321 and arranged in parallel, the second electrode layer includes a second trunk line 1323 and a plurality of second branches 1324 connected in the extending direction of the second trunk line 1323 and arranged in parallel, and the orthographic projection of one first branch 1322 and one second branch 1324 on the first dielectric substrate 11 overlaps at least partially. In one example, both the first trunk line 1321 and the second trunk line 1323 include a first end portion and a second end portion installed opposite to each other, the first power supply unit 131 is provided on the first dielectric substrate 11, and the first power supply unit 131 may be a 1-input 2-output power divider including a first main path 1311, a first branch 1312 and a second branch 1313 connected to the first main path 1311. The first branch 1312 is directly connected to the first end portion of the first trunk line 1321, and the second branch 1313 is coupled to the first end portion of the second trunk line 1323 (that is, the orthographic projection of the second branch 1313 and the first end portion of the second trunk line 1323 on the first dielectric substrate 11 overlaps at least partially). The first main path 1311 is electrically connected to the first radiation unit 14.For example, when the first radiation unit 14 is provided on the side of the first dielectric substrate 11 closer to the first liquid crystal layer 133, the first radiation unit 14 is directly electrically connected to the first main path 1311. When the first radiation unit 14 is provided on the side of the first dielectric substrate 11 away from the first liquid crystal layer 133, the first radiation unit 14 and the first main path 1311 are electrically connected via a first via hole penetrating the first dielectric substrate 11, or the first radiation unit 14 and the first main path 1311 are coupled (that is, the orthographic projections of the first radiation unit 14 and the first main path 1311 on the first dielectric substrate 11 at least partially overlap).

[0031] Note that since both the input and output of electromagnetic waves are realized by the first main path 1311 of the first power supply unit 131, matching impedances are provided at both the second end of the first trunk line 1321 and the second end of the second trunk line 1323, thereby reducing transmission loss.

[0032] In some examples, when the first antenna unit 1 includes the first phase shifter, each first sub-array 10 not only includes the above structure, but may also include a first drive signal line and a second drive signal line. The first drive signal line is electrically connected to the first electrode layer. For example, the first drive signal line is electrically connected to the first trunk line 1321, and the second drive signal line is connected to the second electrode layer. For example, the second drive signal line is electrically connected to the second trunk line 1323. A first voltage is applied to the first trunk line 1321 through the first drive signal line, and a second voltage is applied to the second trunk line 1323 through the second drive signal line. An electric field is formed between the first branch 1322 and the second branch 1324 by the first voltage and the second voltage to deflect the liquid crystal molecules in the first liquid crystal layer 133, and by changing the dielectric constant of the first liquid crystal layer 133, the phase shift of the electromagnetic wave is realized. Here, the first drive signal line and the second drive signal line may be respectively provided on the first dielectric substrate 11 and the second dielectric substrate 12. At this time, the second drive signal line provided on the second dielectric substrate 12 extends to the peripheral region of the second dielectric substrate 12 and is electrically connected to the first lead line located on the first dielectric substrate 11 through a conductive gold ball. Then, the first lead line and the first drive signal line are respectively bound and connected to the corresponding connection pads, and finally, they are bound and connected to the printed circuit board on which the first drive chip is integrated.

[0033] FIG. 6 is a plan view of a second phase shifter in a second sub-array 20 of an embodiment of the present disclosure. FIG. 7 is a cross-section taken along line C-C' of FIG. 6. FIG. 8 is a cross-section taken along line D-D' of FIG. 6. As shown in FIGS. 6 to 8, the second phase shifter includes a second power supply unit 231 and a second phase shifter 232 electrically connected to the second power supply unit 231, and the second power supply unit 231 is further electrically connected to a second radiation unit 24. Here, the second phase shifter 232 includes a third electrode layer provided on a side of a third dielectric substrate 21 close to a fourth dielectric substrate 22, a fourth electrode layer provided on a side of the fourth dielectric substrate 22 close to the third dielectric substrate 21, and a second liquid crystal layer 233 provided 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 extending direction of the third trunk line 2321 and arranged in parallel, the fourth electrode layer includes a fourth trunk line 2323 and a plurality of fourth branches 2324 connected in the extending direction of the fourth trunk line 2323 and arranged in parallel, and the orthographic projection of one third branch 2322 and one fourth branch 2324 on the third dielectric substrate 21 at least partially overlaps. In one example, both the third trunk line 2321 and the fourth trunk line 2323 include a first end portion and a second end portion that are oppositely arranged, the second power supply unit 231 is provided on the third dielectric substrate 21, and the second power supply unit 231 may be a 1-input 2-output power divider including a second main path 2311 and a third branch 2312 connected to the second main path 2311, the third branch 2312 is directly connected to the first end portion of the second trunk line 1323, and a fourth branch 2313 is coupled to the first end portion of the fourth trunk line 2323 (that is, the orthographic projection of the fourth branch 2313 and the first end portion of the fourth trunk line 2323 on the third dielectric substrate 21 at least partially overlaps). The second main path 2311 is electrically connected to the second radiation unit 24.For example, when the second radiation unit 24 is provided on the side of the third dielectric substrate 21 closer to the second liquid crystal layer 233, the second radiation unit 24 is directly electrically connected to the second main path 2311. When the second radiation unit 24 is provided on the side of the third dielectric substrate 21 away from the second liquid crystal layer 233, the second radiation unit 24 and the second main path 2311 are electrically connected through a fourth via hole penetrating the third dielectric substrate 21, or the second radiation unit 24 and the second main path 2311 are coupled (that is, the orthographic projections of the second radiation unit 24 and the second main path 2311 on the third dielectric substrate 21 at least partially overlap).

[0034] Note that since both the input and output of electromagnetic waves are realized by the second main path 2311 of the second power supply unit 231, impedance matching is provided at the second end of the third trunk line 2321 and the second end of the fourth trunk line 2323, and it can be understood that this reduces transmission loss. When the second radiation unit 24 is provided on the side of the third dielectric substrate 21 away from the second liquid crystal layer 233, since the frequency selective surface 3 is a conductive structure, an insulating layer is provided between the layer where the frequency selective surface 3 is located and the layer where the second radiation unit 24 is located.

[0035] In some examples, when the second antenna unit 2 includes the second phase shifter, each second sub-array 20 not only includes the above structure, but may also include a third drive signal line and a fourth drive signal line. The third drive signal line is electrically connected to the third electrode layer. For example, the third drive signal line is electrically connected to the third trunk line 2321. The fourth drive signal line is connected to the fourth electrode layer. For example, the fourth drive signal line is electrically connected to the fourth trunk line 2323. A third voltage is applied to the third trunk line 2321 via the third drive signal line, and a fourth voltage is applied to the fourth trunk line 2323 via the fourth drive signal line. An electric field is formed between the third branch 2322 and the fourth branch 2324 by the third voltage and the fourth voltage to deflect the liquid crystal molecules in the second liquid crystal layer 233, and by changing the dielectric constant of the second liquid crystal layer 233, the phase shift of the electromagnetic wave is realized. Here, the third drive signal line and the fourth drive signal line may be respectively provided on the third dielectric substrate 21 and the fourth dielectric substrate 22. At this time, the fourth drive signal line provided on the fourth dielectric substrate 22 extends to the peripheral region of the fourth dielectric substrate 22 and is electrically connected to the second lead wire located on the third dielectric substrate 21 via a conductive gold ball. Then, the second lead wire and the third drive signal line are respectively bound and connected to the corresponding connection pads, and finally, they are bound and connected to the printed circuit board integrated with the second drive chip.

[0036] It should be noted that only the exemplary structure of the phase shifter is shown above. However, the phase shifter in the embodiments of the present disclosure is not limited thereto, and various types of phase shifters can all be applied to the antennas in the embodiments of the present disclosure, and will not be enumerated one by one here.

[0037] In some examples, the dimensions of the first radiation part 14 and the second radiation part 24 are related to the operating frequencies of the first antenna unit 1 and the second antenna unit 2, and the dimension (area) of the second radiation part 24 is larger than the dimension (area) of the first radiation part 14. The dimensions of the first radiation part 14 and the second radiation part 24 respectively determine the dimensions of the first antenna unit 1 and the second antenna unit 2. In each drawing of the embodiments of the present disclosure, as an example, the orthographic projection of the first radiation 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 radiation 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.

[0038] Specifically, FIG. 9 is a schematic diagram of the correspondence between the first sub-array 10 and the second sub-array 20 of the embodiment of the present disclosure. As shown in FIG. 9, when the operating frequencies of the first antenna unit 1 and the second antenna unit 2 are close, the dimension difference between the first radiation part 14 and the second radiation part 24 is small. At this time, the orthographic projections of the first sub-array 10 and the second sub-array 20 on the plane where the frequency selection surface 3 is located do not overlap. For example, a plurality of first sub-arrays 10 in the first antenna unit 1 form a plurality of first sub-array groups arranged in parallel in the second direction, and each first sub-array group includes a plurality of first sub-arrays 10 arranged in parallel in the first direction. A plurality of second sub-arrays 20 in the second antenna unit 2 form a plurality of second sub-array groups arranged in parallel in the second direction, and each second group includes a plurality of second sub-arrays 20 arranged in parallel in the first direction. The first sub-array groups and the second sub-array groups are alternately installed, and the second sub-arrays 20 and the first sub-arrays 10 are arranged in a staggered manner in the first direction.

[0039] FIG. 10 is a schematic diagram of another corresponding relationship between the first sub-array 10 and the second sub-array 20 of the embodiment of the present disclosure. As shown in FIG. 10, when the difference in the operating frequencies of the first antenna unit 1 and the second antenna unit 2 is large, the orthographic projection of the frequency selection surface 3 of one second sub-array 20 on the plane where the frequency selection surface 3 is located covers the orthographic projection of the frequency selection surfaces 3 of a plurality of first sub-arrays 10 arranged in an array on the plane where the frequency selection surface 3 is located. Note that the orthographic projection of the frequency selection surfaces 3 of all the first sub-arrays 10 on the plane where the frequency selection surface 3 is located is not necessarily covered by the orthographic projection of the frequency selection surface 3 of the second sub-array 20 on the plane where the frequency selection surface 3 is located. Since the second sub-array 20 and the first sub-array 10 overlap in the orthographic projection on the plane where the frequency selection surface 3 is located, the second radiation part 24 of each second sub-array 20 is covered by the first radiation part 14. At this time, the electromagnetic wave radiated by the second radiation part 24 will further radiate the electromagnetic wave through the coupling of the first radiation part 14, thereby increasing the radiation efficiency of the second antenna unit 2 and reducing the transmission loss.

[0040] In some examples, the polarization directions of the first sub-arrays 10 in the first antenna unit 1 may be the same or different. Similarly, the polarization directions of the second sub-arrays 20 in the second antenna unit 2 may be the same or different. The polarization direction of the first sub-array 10 in the first antenna unit 1 may be the same as or different from the polarization direction of the second sub-array 20 in the second antenna unit 2. In the embodiment of the present disclosure, the first antenna unit 1 and the second antenna unit 2 can select one of them according to different application scenarios to realize the beam scanning function, and the other exists as a fixed-direction reflecting surface. Of course, the first antenna unit 1 and the second antenna unit 2 may both be fixed-direction or both realize beam scanning.

[0041] In some examples, the first dielectric substrate 11 and the second dielectric substrate 12 of the first sub-array 10 in the first antenna unit 1 are both shared, and the third dielectric substrate 21 and the fourth dielectric substrate 22 of the second sub-array 20 in the second antenna unit 2 are both shared. By doing so, the structures of the first antenna unit 1 and the second antenna unit 2 are simplified and are easier to implement.

[0042] In some examples, FIG. 11 is a schematic diagram of a patterning unit 31 of a frequency selection surface 3 of a two-frequency antenna according to an embodiment of the present disclosure. As shown in FIG. 11, the frequency selection surface 3 includes a plurality of patterning units 31, and the patterning units 31 are all patches and / or rings. For example, the patterning unit 31 includes an annular ring (a), a rectangular ring (b), a cross-shaped ring (c), a circular patch (d), a square patch (e), a cross-shaped patch (f), and the like.

[0043] In some examples, the first radiation patch 14 and the second radiation patch 24 in the embodiments of the present disclosure may both be radiation patches, and the shape of the radiation patch may be rectangular, circular, triangular, octagonal, etc. Of course, the first radiation patch 14 and the second radiation patch 24 are not limited to radiation patches and may also be dipoles or the like. The selection of the radiation patch can be specifically set according to requirements.

[0044] 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 the embodiments of the present disclosure may be a glass substrate, a printed circuit board (PCB), etc. In the embodiments of the present disclosure, the materials of the first dielectric substrate 11, the second dielectric substrate 12, the third dielectric substrate 21, and the fourth dielectric substrate 22 are not limited.

[0045] In a second aspect, embodiments of the present disclosure further provide an electronic device including the above-described dual-frequency antenna. The electronic device provided by embodiments of the present disclosure further includes a transceiver unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filter unit. The antenna in the electronic device may be used as a transmitting antenna or a receiving antenna. The transceiver unit may include a baseband and a receiving end. The baseband provides signals in at least one frequency band, for example, 2G signals, 3G signals, 4G signals, 5G signals, etc., and transmits signals in at least one frequency band to the radio frequency transceiver. After receiving a signal, the antenna in the electronic device can be transmitted to the receiving end in the transceiver unit through the processing of the filter unit, the power amplifier, the signal amplifier, and the radio frequency transceiver. The receiving end may be, for example, a smart gateway or the like.

[0046] Furthermore, the radio frequency transceiver is connected to the transceiver unit and is used to modulate the signal transmitted by the transceiver unit or to demodulate the signal received by the antenna and transmit it to the transceiver unit. Specifically, the radio frequency transceiver may include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives a plurality of types of signals supplied by the baseband, the demodulation circuit can modulate the plurality of types of signals supplied by the baseband and then transmit them to the antenna. The antenna receives the signal and transmits it to the receiving circuit of the radio frequency transceiver. The receiving circuit transmits the signal to the demodulation circuit, and the demodulation circuit demodulates the signal and transmits it to the receiving end.

[0047] Furthermore, the radio frequency transceiver connects a signal amplifier and a power amplifier. The signal amplifier and the power amplifier are further connected to a filter unit, and the filter unit is connected to at least one antenna. In the process of the electronic device transmitting a signal, the signal amplifier is used to increase the signal-to-noise ratio of the signal output by the radio frequency transceiver and transmit it to the filter unit. The power amplifier is used to amplify the power of the signal output by the radio frequency transceiver and transmit it to the filter unit. The filter unit may specifically include a duplexer and a filter circuit. The filter unit combines the signals output by the signal amplifier and the power amplifier, filters out spurious signals, and transmits them to the antenna, and the antenna radiates the signal. In the process of the electronic device receiving a signal, the antenna transmits the received signal to the filter unit after receiving it. The filter unit filters out the signal received by the antenna and transmits it to the signal amplifier and the power amplifier. The signal amplifier provides gain to the signal received by the antenna, increases the signal-to-noise ratio of the signal, and the power amplifier amplifies the power of the signal received by the antenna. The signal received by the antenna is transmitted to the radio frequency transceiver after passing through the processing of the power amplifier and the signal amplifier, and the radio frequency transceiver further transmits it to the transceiver unit.

[0048] In some examples, the signal amplifier may include multiple types of signal amplifiers, for example, but not limited to, a low-noise amplifier.

[0049] In some examples, the electronic device provided by the embodiments of the present disclosure further includes a power management unit. The power management unit is connected to the power amplifier and provides a voltage for amplifying the signal to the power amplifier.

[0050] It should be understood that the above-described embodiments are merely exemplary embodiments used to explain the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art can make various modifications and improvements without departing from the spirit and gist of the present invention, and such modifications and improvements are also included in the claims of the present invention.

Claims

1. A first antenna unit and a second antenna unit installed opposite to each other, and a filter unit installed 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. The filter unit is arranged to reflect electromagnetic waves in the first frequency band and transmit electromagnetic waves in the second frequency band. The first antenna unit is arranged to receive electromagnetic waves in the first frequency band and reflect the received electromagnetic waves in the first frequency band by the filter unit. The second antenna unit is arranged to receive electromagnetic waves in the second frequency band that have passed through the filter unit and reflect the electromagnetic waves in the second frequency band. A dual-frequency antenna.

2. The first antenna unit includes at least one first sub-array, and the second antenna unit includes at least one second sub-array. The first sub-array includes a first dielectric substrate and a second dielectric substrate installed opposite to each other, a first phase adjustment structure installed between the first dielectric substrate and the second dielectric substrate, and a first radiation part installed on the first dielectric substrate. The filter unit is provided 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 radiation part, and is arranged to adjust the phase of the electromagnetic waves in the first frequency band received by the first radiation part and radiate the phase-shifted electromagnetic waves by the first radiation part. The second sub-array includes a third dielectric substrate and a fourth dielectric substrate installed opposite to each other, a second phase adjustment structure installed between the third dielectric substrate and the fourth dielectric substrate, a second radiation part installed on the third dielectric substrate, and a reference electrode layer installed on the side of the fourth dielectric substrate away from the third dielectric substrate. The third dielectric substrate is provided on the side of the filter unit away from the second dielectric substrate. The second phase adjustment structure is electrically connected to the second radiation part, and is arranged to adjust the phase of the electromagnetic waves in the second frequency band received by the second radiation part and radiate the phase-shifted electromagnetic waves by the second radiation part. The dual-frequency antenna according to Claim 1.

3. The first sub-array and the second sub-array do not overlap in the orthographic projection on the plane where the filter unit is located. The dual-frequency antenna according to claim 2.

4. The numbers of the first sub-array and the second sub-array are both plural, the number of the first sub-array is less than that of the second sub-array, the first sub-array and the second sub-array are both arranged in an array, and the orthographic projection of the filter unit of one of the second sub-arrays on the plane where the filter unit is located covers the orthographic projection of the filter unit of one or more of the first sub-arrays on the plane where the filter unit is located. The dual-frequency antenna according to claim 2.

5. The first phase adjustment structure includes a first power feeding portion and a first phase shifter electrically connected to the first power feeding portion. The first power feeding portion is further electrically connected to the first radiation portion. The first phase shifter includes a first electrode layer provided on a side of the first dielectric substrate close to the second dielectric substrate, a second electrode layer provided on a side of the second dielectric substrate close to the first dielectric substrate, and a first adjustable dielectric layer provided between the first electrode layer and the second electrode layer. The dual-frequency antenna according to any one of claims 2 to 4.

6. The first sub-array further includes a first drive signal line and a second drive signal line. The first drive signal line is electrically connected to the first electrode layer, and the second drive signal line is electrically connected to the second electrode layer. The dual-frequency antenna according to claim 5.

7. For one of the first sub-arrays, the first radiation portion is located on a side of the first dielectric substrate away from the first phase adjustment structure, and the first radiation portion is electrically connected to the first power feeding portion through a first via hole penetrating the first dielectric substrate. The dual-frequency antenna according to claim 5.

8. For one of the first sub-arrays, the first radiation portion is located on a side of the first dielectric substrate away from the first phase adjustment structure, and the orthographic projections of the first radiation portion and the first power feeding portion on the first dielectric substrate at least partially overlap. The dual-frequency antenna according to claim 5.

9. The second phase adjustment structure includes a second power supply unit and a second phase shifter electrically connected to the second power supply unit. The second power supply unit is further electrically connected to the second radiation unit. The second phase shifter includes a third electrode layer provided on a side of a third dielectric substrate close to the fourth dielectric substrate, a fourth electrode layer provided on a side of the fourth dielectric substrate close to the third dielectric substrate, and a second adjustable dielectric layer provided between the third electrode layer and the fourth electrode layer. The two-frequency antenna according to any one of claims 2 to 4.

10. The second sub-array further includes a third drive signal line and a fourth drive signal line. The third drive signal line is electrically connected to the third electrode layer, and the fourth drive signal line is electrically connected to the fourth electrode layer. The two-frequency antenna according to claim 9.

11. For one of the second sub-arrays, the second radiation unit is located on a side of the third dielectric substrate away from the second phase adjustment structure, and the second radiation unit is electrically connected to the third power supply unit through a second via hole penetrating the third dielectric substrate. The two-frequency antenna according to claim 9.

12. For one of the second sub-arrays, the second radiation unit is located on a side of the third dielectric substrate away from the second phase adjustment structure, and a front projection of the second radiation unit and the third power supply unit on the third dielectric substrate at least partially overlaps. The two-frequency antenna according to claim 9.

13. The number of the first sub-arrays is plural, the first dielectric substrate and the second dielectric substrate of each of the first sub-arrays are shared, the number of the second sub-arrays is plural, and the third dielectric substrate and the fourth dielectric substrate of each of the second sub-arrays are shared. The two-frequency antenna according to any one of claims 2 to 4.

14. The reference electrode layer includes a reflective layer. The two-frequency antenna according to any one of claims 2 to 4.

15. The filter unit includes a plurality of patterning units, and the patterning unit is a patch and / or a loop. The two-frequency antenna according to any one of claims 2 to 4.

16. An electronic device including the two-frequency antenna according to any one of claims 1 to 15.

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