Receiving and transmitting common-caliber antenna array and receiving and transmitting dual-frequency antenna unit thereof

Abstract

The present application discloses a transmit-receive common-aperture antenna array and a transmit-receive dual-frequency antenna unit thereof, applied to the technical field of signal transmission, the transmit-receive dual-frequency antenna unit comprising: a first radiation patch for receiving signals of a first frequency band; the first feed part is used for sending a signal received by the first radiation patch to the radio frequency signal processing equipment; the second radiation patch is used for transmitting signals of a second frequency band; the second feed part is used for sending a signal sent by the radio frequency signal processing equipment to the second radiation patch; and the first filtering patch and / or the second filtering patch are / is further included, so that the good filtering characteristic is achieved. The first radiation patch is annular, so that the second radiation patch is embedded in the first radiation patch. By applying the scheme of the invention, the miniaturization of the receiving and transmitting dual-frequency antenna unit can be ensured, the high isolation between receiving and transmitting can be ensured, and the antenna also has the characteristics of good filtering characteristic, wide frequency band, large-angle scanning, circular polarization guarantee and easy processing.

Description

Technical Field

[0001] The present invention relates to the field of signal transmission technology, and in particular to a transmitting and receiving co-aperture antenna array and a transmitting and receiving dual-frequency antenna unit thereof. Background Art

[0002] With the development of wireless communication systems, satellite communications have made it possible for wireless communication systems to further achieve high transmission rates, large transmission capacities and comprehensive communication coverage.

[0003] In recent years, the integrated design of transceiver communication systems has become a new development trend in satellite communication systems. However, there is little research on co-aperture phased array antennas used in satellite communications, and the design is difficult, making it difficult to ensure the miniaturization of the entire system.

[0004] In summary, how to effectively realize a co-aperture dual-frequency antenna for transmitting and receiving and ensure the miniaturization design of the system is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a transmitting and receiving co-aperture antenna array and a transmitting and receiving dual-frequency antenna unit thereof, so as to effectively realize the co-aperture transmitting and receiving dual-frequency antenna and ensure the miniaturization design of the system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a dual-frequency transmitting and receiving antenna unit, comprising:

[0008] A first radiation patch is used for receiving signals in a first frequency band; a first feeding unit is used for sending the signals received by the first radiation patch to a radio frequency signal processing device; a second radiation patch is used for transmitting signals in a second frequency band; a second feeding unit is used for sending the signals sent by the radio frequency signal processing device to the second radiation patch; the first radiation patch is annular, so that the second radiation patch is embedded in the first radiation patch;

[0009] It also includes: a first filter patch connected to the first feeding part, used to suppress signals in the second frequency band when the first radiation patch receives signals in the first frequency band; and / or a second filter patch connected to the second feeding part, used to suppress signals in the first frequency band when the second radiation patch transmits signals in the second frequency band.

[0010] In one embodiment, the path length of the first filter patch conforms to a first length range;

[0011] The first length range is expressed as [X-△x, X+△x], where X is a quarter wavelength of the second frequency band, and △x is a preset first error threshold;

[0012] The path length of the second filter patch conforms to a second length range;

[0013] The second length range is expressed as [Y-△y, Y+△y], where Y is a quarter wavelength of the first frequency band, and △y is a preset second error threshold.

[0014] In one embodiment, the dual-band transmitting and receiving antenna unit includes n-1 dielectric layers and n conductor layers, n is a positive integer not less than 2, and the first radiation patch and the second radiation patch are both located in the ath conductor layer, a is a positive integer and 1≤a≤n;

[0015] The first feeding part includes: a first feeding post, a second feeding post and a power splitting feeding part; the power splitting feeding part is located in the cth conductor layer; c is a positive integer and 1<c<n, and the c+1th conductor layer and the c-1th conductor layer are both ground layers; the first filter patch is connected to the first feeding post;

[0016] The first end of the first feeding post is connected to the first receiving end of the power division feeding part, and the second end of the first feeding post is used to receive the signal originated from the first radiation patch to send it to the power division feeding part; the first end of the second feeding post is connected to the second receiving end of the power division feeding part, and the second end of the second feeding post is used to receive the signal originated from the first radiation patch to send it to the power division feeding part; the power division feeding part is used to send the received signal to the RF signal processing device through its own signal output end.

[0017] In one embodiment, it further includes:

[0018] The third filter patch connected to the second feeding column is used to suppress signals in the second frequency band when the first radiation patch receives signals in the first frequency band.

[0019] In one embodiment, a first arc conductor is provided between the first receiving end of the power division feeding unit and the signal output end, and a second arc conductor is provided between the second receiving end of the power division feeding unit and the signal output end;

[0020] The center of the first arc conductor coincides with the center of the second arc conductor, and an angle formed by a line connecting the center of the circle and the first receiving end of the power division feeding unit and a line connecting the center of the circle and the second receiving end of the power division feeding unit conforms to a preset angle range;

[0021] The preset angle range is expressed as [90°-△z, 90°+△z], where △z is a preset third error threshold.

[0022] In one embodiment, the second feed section includes: a third feed column;

[0023] The first end of the third feeding pole is connected to the RF signal processing device to receive the signal sent by the RF signal processing device, and the second end of the third feeding pole is used to send the signal sent by the RF signal processing device to the second radiation patch;

[0024] The second filter patch is connected to the third feeding post.

[0025] In one embodiment, it further includes: a first coupling patch;

[0026] The first coupling patch is connected to the second end of the third feeding column to reduce the parasitic inductance introduced by the third feeding column.

[0027] In one embodiment, it further includes:

[0028] A third radiation patch located in the b-th conductor layer, used for receiving signals in the first frequency band; wherein b is a positive integer and 1≤a<b<c<n;

[0029] Accordingly, the second end of the first feeding column is specifically used to: receive signals from the first radiation patch and the third radiation patch to send to the power division feeding part;

[0030] The second end of the second feeding column is specifically used to: receive signals from the first radiation patch and the third radiation patch to send to the power division feeding part;

[0031] The first feed post and the second feed post are both perpendicular to each dielectric layer; the first feed post is not connected to the first radiation patch and is not connected to the third radiation patch; the second feed post is not connected to the first radiation patch and is not connected to the third radiation patch.

[0032] In one embodiment, it further includes:

[0033] A plurality of first conductor posts are arranged around the inner edge of the first radiation patch; each of the first conductor posts is perpendicular to each dielectric layer, and each of the first conductor posts is connected to the first radiation patch, the third radiation patch and each grounding layer of the transceiver dual-band antenna unit.

[0034] In one embodiment, it further includes:

[0035] A fourth radiation patch located in the b-th conductor layer, used for transmitting signals in the second frequency band;

[0036] The second feeding unit is also used to send the signal sent by the radio frequency signal processing device to the fourth radiation patch; the third radiation patch is ring-shaped, so that the fourth radiation patch is embedded in the third radiation patch.

[0037] In one embodiment, the first radiation patch is annular, the second radiation patch is circular, the third radiation patch is annular, the fourth radiation patch is circular, and one or more cut-angle structures are provided on the fourth radiation patch.

[0038] In one embodiment, it further includes: a second conductor post;

[0039] The second conductor column is perpendicular to each dielectric layer, and the second conductor column is connected to the fourth radiation patch and each grounding layer of the transceiver dual-frequency antenna unit.

[0040] In a second aspect, the present invention provides a transceiver co-aperture antenna array, comprising a plurality of transceiver dual-frequency antenna units arranged on the same board, and the structure of each transceiver dual-frequency antenna unit is the same, and each transceiver dual-frequency antenna unit is the transceiver dual-frequency antenna unit described above.

[0041] In one embodiment, the dual-frequency transmitting and receiving antenna units in the transmitting and receiving co-aperture antenna array are arranged in a field shape, so that in the x-axis direction, the spacing between any adjacent dual-frequency transmitting and receiving antenna units is d 1 , and the spacing between any adjacent dual-frequency transmitting and receiving antenna units in the y-axis direction is d 1 ;

[0042] Wherein, the x-axis and y-axis are the horizontal axis and vertical axis of the transmitting and receiving co-aperture antenna array, respectively. 1 The preset first spacing.

[0043] In one embodiment, a transmitting single-frequency antenna unit is also arranged at the center of the t-shaped structure formed by every four transmitting and receiving dual-frequency antenna units, and the structure of the transmitting single-frequency antenna unit is the same as the transmitting structure in each of the transmitting and receiving dual-frequency antenna units.

[0044] In one embodiment, it also includes a conductor shielding tape and a conductor shielding post;

[0045] The conductor shielding column is used to ground the conductor shielding tape;

[0046] The conductor shielding tape is used to surround each of the dual-frequency transmitting and receiving antenna units to perform electrical isolation between the dual-frequency transmitting and receiving antenna units.

[0047] Applying the technical solution provided in the embodiment of the present invention, the transceiver dual-frequency antenna unit includes a first radiation patch and a first feed part, the first radiation patch can receive signals in the first frequency band, and the first feed part can send the signal received by the first radiation patch to the radio frequency signal processing device. The transceiver dual-frequency antenna unit also includes a second radiation patch and a second feed part, the second radiation patch can transmit signals in the second frequency band, and the second feed part can send the signal sent by the radio frequency signal processing device to the second radiation patch. It can be seen that through such a design, the transceiver dual-frequency antenna unit of the present application effectively realizes the transmission and reception of signals in different frequency bands, that is, effectively realizes the transceiver dual-frequency antenna unit. In addition, the first radiation patch adopts a ring-shaped design, so that the second radiation patch can be embedded in the first radiation patch, which is conducive to ensuring the miniaturization of the transceiver dual-frequency antenna unit and realizing the co-aperture design of the transceiver dual-frequency antenna unit.

[0048] A first filter patch is also provided, and when the first radiation patch receives a signal in the first frequency band, the signal in the second frequency band can be suppressed during reception, thereby achieving good filtering characteristics. And / or a second filter patch is provided, and when the second radiation patch transmits a signal in the second frequency band, the signal in the first frequency band can be suppressed during transmission, thereby achieving good filtering characteristics. For example, the path lengths of the first radiation patch and the second radiation patch can be set specifically through the principle of radiation cancellation, so that for signal transmission, the interference in the receiving frequency band can be suppressed to a lower level. Similarly, for signal reception, the interference in the transmitting frequency band can be suppressed to a lower level.

[0049] In addition, the traditional dual-frequency antenna for transmitting and receiving has poor isolation between transmitting and receiving, which causes interference between the transmitting and receiving channels. In addition, the dual-frequency antenna for transmitting and receiving also needs to meet the characteristics of wide frequency band, large-angle scanning, circular polarization and easy processing, which adds more difficulty to the design of the dual-frequency antenna for transmitting and receiving with the same aperture. In the present application scheme, high isolation between transmitting and receiving can be guaranteed, and it also has the characteristics of wide frequency band, large-angle scanning, guaranteed circular polarization and easy processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A schematic structural diagram of a dual-frequency transmitting and receiving antenna unit provided in a specific embodiment of the present invention;

[0052] Figure 2 A side view of a dual-frequency transmitting and receiving antenna unit in a specific embodiment of the present invention;

[0053] Figure 3 It is a schematic structural diagram of the first conductor layer of the transmitting and receiving co-aperture antenna array in a specific implementation manner of the present invention;

[0054] Figure 4 It is a schematic structural diagram of the third conductor layer of the transmitting and receiving co-aperture antenna array in a specific implementation manner of the present invention;

[0055] Figure 5 It is a schematic structural diagram of the fifth conductor layer of the transmitting and receiving co-aperture antenna array in a specific implementation manner of the present invention;

[0056] Figure 6 It is a schematic structural diagram of the second conductor layer of the transmitting and receiving common-aperture antenna array in a specific implementation manner of the present invention. DETAILED DESCRIPTION

[0057] The core of the present invention is to provide a transmitting and receiving co-aperture antenna array and a transmitting and receiving dual-frequency antenna unit thereof, which is conducive to ensuring the miniaturization of the transmitting and receiving dual-frequency antenna unit, can ensure high isolation between transmitting and receiving, and also has good filtering characteristics, wide bandwidth, large angle scanning, circular polarization guarantee and easy processing.

[0058] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a dual-frequency transmitting and receiving antenna unit provided in a specific embodiment of the present invention, the dual-frequency transmitting and receiving antenna unit may include:

[0060] The first radiation patch 11 is used for receiving signals in the first frequency band; the first feeding portion 40 is used for sending the signals received by the first radiation patch 11 to the radio frequency signal processing device; the second radiation patch 12 is used for transmitting signals in the second frequency band; the second feeding portion 41 is used for sending the signals sent by the radio frequency signal processing device to the second radiation patch 12; the first radiation patch 11 is annular, so that the second radiation patch 12 is embedded in the first radiation patch 11.

[0061] It also includes: a first filter patch 21 connected to the first feeding part 40, used to suppress signals in the second frequency band when the first radiation patch 40 receives signals in the first frequency band; and / or a second filter patch 50 connected to the second feeding part 41, used to suppress signals in the first frequency band when the second radiation patch 12 transmits signals in the second frequency band.

[0062] Specifically, the dual-frequency transmitting and receiving antenna of the present application can usually be implemented by a planar PCB (Printed Circuit Board) multilayer board structure. The first radiating patch 11 and the second radiating patch 12 can usually be metal radiating patches, and the first radiating patch 11 and the first feeding part 40 serve as the receiving structure of the dual-frequency transmitting and receiving antenna, and the second radiating patch 12 and the second feeding part 41 serve as the transmitting structure of the dual-frequency transmitting and receiving antenna. Of course, in the following embodiments, the receiving structure and the transmitting structure of the dual-frequency transmitting and receiving antenna are further designed.

[0063] The first radiation patch 11 can receive signals in the first frequency band, and then send the received signals to the RF signal processing device through the first feeding part 40. The first feeding part 40 can be directly connected to the first radiation patch 11 to receive the signal from the first radiation patch 11, or it can not be directly connected to the first radiation patch 11, but receive the signal from the first radiation patch 11 by coupling. The specific structure of the first feeding part 40 can also be designed according to actual needs, and it can effectively send the signal from the first radiation patch 11 to the RF signal processing device. For example, it can be achieved through the first feeding column 401, the second feeding column 402 and the power splitter feeding part.

[0064] The second radiation patch 12 can transmit signals in the second frequency band, and the specific frequency band ranges of the first frequency band and the second frequency band can be set and adjusted according to actual needs, which does not affect the implementation of the present invention. For example, in an actual application, the first frequency band is the K frequency band, and the second frequency band is the Ka frequency band.

[0065] The second feeding part 41 can send the signal sent by the RF signal processing device to the second radiating patch 12, so that the second radiating patch 12 transmits the signal in the second frequency band. Similarly, the second feeding part 41 can be directly connected to the second radiating patch 12 to send the signal sent by the RF signal processing device to the second radiating patch 12, or it can not be directly connected to the second radiating patch 12, but send the signal sent by the RF signal processing device to the second radiating patch 12 by coupling. The specific structure of the second feeding part 41 can also be designed according to actual needs, and it can effectively send the signal sent by the RF signal processing device to the second radiating patch 12.

[0066] The first radiation patch 11 needs to be set in a ring shape so that the second radiation patch 12 can be embedded in the first radiation patch 11. Of course, the specific ring shape and size of the first radiation patch 11, as well as the shape and size of the second radiation patch 12, can be set and adjusted according to actual needs, so that the second radiation patch 12 can be effectively embedded in the first radiation patch 11. For example, the first radiation patch 11 can be a circular ring, or an elliptical ring, a triangular ring, a star-shaped ring, or even an irregular ring. In practical applications, the first radiation patch 11 is usually a circular ring, and the second radiation patch 12 is a circle, which is convenient for production and processing, and easy to achieve good radiation performance.

[0067] As described above, the dual-frequency transmitting and receiving antenna of the present application can generally be implemented by a planar PCB multi-layer board structure. In practical applications, the first radiation patch 11 and the second radiation patch 12 can generally be located in the same layer. For example, in a specific embodiment of the present invention, the dual-frequency transmitting and receiving antenna unit includes n-1 dielectric layers and n conductor layers, n is a positive integer not less than 2, and the conductor used in the conductor layer is generally a metal conductor. The first radiation patch 11 and the second radiation patch 12 can both be located in the ath conductor layer, that is, the two need to be located in the same conductor layer, a is a positive integer and 1≤a≤n. For example, generally speaking, the first radiation patch 11 and the second radiation patch 12 will be arranged on the surface layer of the PCB, that is, the first conductor layer, and a is equal to 1 at this time.

[0068] n is a positive integer not less than 2, for example Figure 2 is a side view of a dual-frequency transmitting and receiving antenna unit in a specific implementation manner, Figure 2 In the example, n=6, that is, the dual-band antenna unit includes 5 dielectric layers and 6 conductor layers, and the 5 dielectric layers are the first dielectric layer J1, the second dielectric layer J2, the third dielectric layer J3, the fourth dielectric layer J4 and the fifth dielectric layer J5. A conductor layer, or metal layer, is printed on each dielectric layer, and a conductor layer is also printed on the bottom of the bottom dielectric layer, so Figure 2 In the example of the present invention, there are 6 conductor layers, which are the first conductor layer D1, the second conductor layer D2, the third conductor layer D3, the fourth conductor layer D4, the fifth conductor layer D5 and the sixth conductor layer D6 from top to bottom. Figure 3 , Figure 4 , Figure 5 as well as Figure 6 In the implementation method, the Figure 2 Such a design of 5 dielectric layers and 6 conductor layers can effectively realize the layout of various components.

[0069] The specific structure of the first feeding part 40 can be set and adjusted according to actual needs, as long as it can effectively realize its function, that is, it can effectively send the signal received by the first radiation patch 11 to the radio frequency signal processing device. For example, it can be connected to the radio frequency signal processing device through a feeding pole.

[0070] In a specific embodiment of the present invention, considering that the dual-frequency antenna for transmitting and receiving can usually be realized by a planar PCB multilayer board structure, a more complex form of the first feeding part 40 can be supported, and the first feeding part 40 based on the power division structure can ensure better signal transmission quality. Therefore, in a specific embodiment of the present invention, please refer to Figure 4 and Figure 5 The first feeding part 40 may specifically include: a first feeding column 401, a second feeding column 402 and a power division feeding part; the power division feeding part is located at the cth conductor layer; c is a positive integer and 1<c<n, and the c+1th conductor layer and the c-1th conductor layer are both ground layers.

[0071] The first end of the first feeding post 401 is connected to the first receiving end of the power division feeding part, and the second end of the first feeding post 401 is used to receive a signal from the first radiation patch 11 to send to the power division feeding part;

[0072] A first end of the second feeding post 402 is connected to a second receiving end of the power division feeding section, and a second end of the second feeding post 402 is used to receive a signal from the first radiation patch 11 to send to the power division feeding section;

[0073] The power divider and feeder is used to send the received signal to the radio frequency signal processing device through its own signal output terminal.

[0074] As described above, the first filter patch 21 needs to be connected to the first feeder 40, so that the first radiation patch 40 can receive the signal of the first frequency band while suppressing the signal of the second frequency band. The specific connection position of the first filter patch 21 can be set according to actual needs, so that it can effectively complete its function. For example, for this embodiment, the first filter patch 21 can be specifically connected to the first feeder post 401. In addition, the specific connection position of the third filter patch 22 described in the following embodiment can be set according to actual needs, so that it can effectively complete its function. For example, for the first feeder 40 of this example, the third filter patch 22 can be connected to the second feeder post 402.

[0075] In practical applications, the first feeding post 401 and the second feeding post 402 can be perpendicular to each dielectric layer, and the power division feeding part is located in the cth conductor layer. Since the upper and lower layers of the power division feeding part are usually required to be ground layers, that is, the c+1th conductor layer and the c-1th conductor layer are required to be ground layers, c is a positive integer and 1<c<n. For example, in one embodiment, in order to facilitate the connection of the radio frequency signal processing equipment, the power division feeding part can be set at a position close to the bottom layer, for example, it can be located in the 5th conductor layer, that is, c=5. The first receiving end and the second receiving end of the power division feeding part are respectively connected to the first end of the first feeding post 401 and the first end of the second feeding post 402, and the power division feeding part can send the received signal to the radio frequency signal processing equipment through its own signal output end.

[0076] The function of the first feeding part 40 can be effectively realized through the first feeding post 401, the second feeding post 402 and the power dividing feeding part, that is, the signal transmission quality can be effectively improved by adopting the power dividing feeding structure of the first feeding post 401, the second feeding post 402 and the power dividing feeding part.

[0077] In the solution of the present application, a first filter patch 21 connected to the first feeder 40 is provided for suppressing signals of the second frequency band when the first radiation patch 40 receives signals of the first frequency band; and / or a second filter patch 50 connected to the second feeder 41 is provided for suppressing signals of the first frequency band when the second radiation patch 12 transmits signals of the second frequency band, thereby effectively ensuring the signal transmission quality. The specific implementation of the first filter patch 21 and the second filter patch 50 can be set according to actual needs.

[0078] In practical applications, the positions of the first filter patch 21 and the second filter patch 50 can be set according to actual needs. For example, the first filter patch 21 is usually not on the same conductor layer as the first radiation patch 11, the third radiation patch 31 and the power division feeding part. Figure 6 ,for Figure 3 Schematic diagram of the structure of the second conductor layer of the transmit-receive co-aperture antenna array, in which the U-shaped first filter patch 21 is arranged on the second conductor layer.

[0079] The first filter patch 21 is connected to the first feed part 40, for example, in one specific embodiment described above, it is connected to the second end of the first feed post 401. In addition, for the first feed part 40 based on the power splitting feeding structure described above, since there are the first feed post 401 and the second feed post 402, a third filter patch 22 connected to the second feed post 402 may also be provided, so as to suppress the signal of the second frequency band when the first radiation patch 11 receives the signal of the first frequency band.

[0080] That is to say, in this embodiment, the third filter patch 22 and the first filter patch 21 can both suppress the signal in the transmission frequency band, that is, the second frequency band, when receiving the signal, so that the received signal will not be interfered by the signal in the second frequency band. The third filter patch 22 is connected to the second feeding post 402, for example, in a specific embodiment, it is connected to the second end of the second feeding post 402.

[0081] The specific shapes of the third filter patch 22 and the first filter patch 21 can be set according to actual needs as long as the functional requirements thereof can be effectively achieved. Since the functions are the same, the shapes of the third filter patch 22 and the first filter patch 21 can usually be the same.

[0082] In a specific embodiment of the present invention, the path length of the first filter patch conforms to the first length range;

[0083] The first length range is expressed as [X-△x, X+△x], where X is a quarter wavelength of the second frequency band, and △x is a preset first error threshold.

[0084] In this implementation, the path length of the first filter patch 21 can be equal to one quarter wavelength X of the second frequency band, and considering the production error, the path length of the first filter patch 21 is allowed to fluctuate around X, that is, the path length of the first filter patch 21 conforms to the first length range [X-△x, X+△x]. This is conducive to achieving filtering characteristics for the transmission frequency band through radiation cancellation, and can suppress the interference of the second frequency band to a lower level. Similarly, the path length of the third filter patch 22 can also conform to the first length range, and ideally should be equal to one quarter wavelength of the second frequency band, so that when the dual-frequency antenna unit for transmitting and receiving receives signals in the first frequency band, the interference of the second frequency band can be suppressed to a lower level through the principle of radiation cancellation, thereby achieving good filtering characteristics.

[0085] In addition, by Figure 3 and Figure 6 It can be seen that the first filter patch 21 and the third filter patch 22 are both U-shaped filter patches. This is because there are requirements for the path length of the first filter patch 21 and the third filter patch 22. If they are straight lines, they will occupy a larger space. When a U-shaped filter patch is used, the sum of the lengths of the three sides of the U-shape is the path length of the filter patch, so that such a filter patch will only occupy a smaller space.

[0086] The second filter patch 50 needs to be connected to the second feeding unit 41 , and the specific shape can be set according to actual needs as long as it can effectively achieve the functional requirements thereof, for example, the second filter patch 50 can be an arc-shaped one.

[0087] In one implementation, the second filter patch 50 may also be designed based on the radiation cancellation principle. Specifically, the path length of the second filter patch 50 conforms to the second length range.

[0088] The second length range is expressed as [Y-△y, Y+△y], where Y is a quarter wavelength of the first frequency band, and △y is a preset second error threshold.

[0089] That is to say, in this embodiment, the path length of the second filter patch 50 can be equal to one quarter wavelength of the first frequency band under ideal circumstances, which is conducive to achieving filtering characteristics for the receiving frequency band through radiation cancellation, that is, for the transmission of the antenna, the interference of the first frequency band can be suppressed to a lower level through the principle of radiation cancellation, and good filtering characteristics can be achieved. Of course, the path length of the second filter patch 50 is allowed to fluctuate around the one quarter wavelength of the first frequency band, that is, the path length of the second filter patch 50 conforms to the second length range and is expressed as [Y-△y, Y+△y].

[0090] The conductor layer where the second filter patch 50 is specifically located can be arranged according to actual needs, for example Figure 5 In the embodiment of FIG. 5 , an arc-shaped second filter patch 50 is shown. In this case, the second filter patch 50 is disposed on the fifth conductor layer. Compared with the linear design, the arc-shaped second filter patch 50 occupies less space.

[0091] In a specific embodiment of the present invention, the dual-frequency transmitting and receiving antenna unit may further include:

[0092] The third radiation patch 31 located in the b-th conductor layer is used to receive signals in the first frequency band; wherein b is a positive integer and 1≤a<b<c<n. Correspondingly, the first feeding part 40 is also used to send the signal received by the third radiation patch 31 to the radio frequency signal processing device. When the first feeding part 40 is specifically composed of a first feeding post 401, a second feeding post 402 and a power division feeding part, the second end of the first feeding post 401 is specifically used to: receive signals originating from the first radiation patch 11 and the third radiation patch 31, and send them to the power division feeding part. The second end of the second feeding post is specifically used to: receive signals originating from the first radiation patch 40 and the third radiation patch 31, and send them to the power division feeding part.

[0093] As described above, the first feed post 401 and the second feed post 403 may both be perpendicular to each dielectric layer, and in this embodiment, the first feed post 401 may not be connected to the first radiation patch 11, and may not be connected to the third radiation patch 31; the second feed post 402 may not be connected to the first radiation patch 11, and may not be connected to the third radiation patch 31.

[0094] In this embodiment, a third radiation patch 31 is also provided for the receiving structure of the dual-frequency antenna unit for transmitting and receiving. The third radiation patch 31 can also receive signals in the first frequency band, and then send the signals received by the third radiation patch 31 to the radio frequency signal processing device through the first feeding part 40. When such a design is adopted, it is beneficial to further improve the radiation performance of the dual-frequency antenna unit for transmitting and receiving. In actual applications, the third radiation patch 31 and the first radiation patch 11 can both be circular, but there is a slight difference in their sizes, so that although the two still receive signals in the first frequency band, there is a slight difference in their specific resonant frequencies within the first frequency band, which is beneficial to ensure the signal reception performance of the dual-frequency antenna unit for transmitting and receiving of the present application in the first frequency band.

[0095] Considering that the dual-frequency transmitting and receiving antenna unit of the present application usually needs to be used in a transmitting and receiving co-aperture antenna array, multiple transmitting and receiving dual-frequency antenna units can be set in the transmitting and receiving co-aperture antenna array. Therefore, in order to effectively realize the space utilization of the PCB board, as described above, the transmitting and receiving dual-frequency antenna unit in the scheme of the present application may include n-1 layers of dielectric layers and n layers of conductor layers. In this embodiment, the first radiation patch 11 and the second radiation patch 12 can be arranged on the same conductor layer, while the third radiation patch 31 is arranged on other conductor layers. In actual applications, in a direction perpendicular to the PCB board, the third radiation patch 31 can overlap with the first radiation patch 11, so as to facilitate the feeding of the first feeding part 40, and also facilitate the arrangement of the transmitting and receiving co-aperture antenna array.

[0096] As described above, the first radiation patch 11 and the second radiation patch 12 need to be located in the same conductor layer. For example, generally speaking, the first radiation patch 11 and the second radiation patch 12 are arranged on the surface layer of the PCB, that is, the first conductor layer, and a is equal to 1. The third radiation patch 31 can be arranged inside the PCB board. For example, in one case, the third radiation patch 31 is arranged on the third conductor layer, and b is equal to 3.

[0097] See also Figure 3 and Figure 4 , Figure 3 is a schematic structural diagram of the first conductor layer of a transmitting and receiving common aperture antenna array in a specific implementation manner, Figure 3 4 transmit-receive dual-frequency antenna units in the transmit-receive co-aperture antenna array are shown, and the structures of the 4 transmit-receive dual-frequency antenna units are the same. The first radiation patch 11 is annular, and the first radiation patch 11 and the second radiation patch 12 are both arranged on the first conductor layer. Figure 4 It is a schematic structural diagram of the third conductor layer of the transmit-receive co-aperture antenna array. The third radiation patch 31 is also in a circular ring shape, and the third radiation patch 31 is arranged on the third conductor layer.

[0098] In addition, it should be noted that, in this embodiment, the second end of the first feed post 401 is used to receive signals from the first radiation patch 11 and the third radiation patch 31 to send them to the power splitter feeding section, but the first feed post 401 is not directly connected to the first radiation patch 11, and is not directly connected to the third radiation patch 31. Such a design can introduce capacitance to balance the inductance generated by the first feed post 401, thereby improving the bandwidth and radiation performance of the dual-frequency antenna unit for transmitting and receiving. Similarly, the second end of the second feed post 402 is used to receive signals from the first radiation patch 11 and the third radiation patch 31 to send them to the power splitter feeding section, but the second feed post 402 is not directly connected to the first radiation patch 11, and is not directly connected to the third radiation patch 31, thereby improving the bandwidth and radiation performance of the dual-frequency antenna unit for transmitting and receiving.

[0099] The power division feeding part is located in the cth conductor layer, usually not in the same conductor layer as the first radiation patch 11 and the third radiation patch 31, and is usually arranged at the bottom of the third radiation patch 31, so 1≤a<b<c<n, for example, in one embodiment of the present application, a=1, b=3, c=5.

[0100] In a specific embodiment of the present invention, it may also include:

[0101] A plurality of first conductor posts 42 are arranged around the inner edge of the first radiation patch 11; each first conductor post 42 is perpendicular to each dielectric layer, and each first conductor post 42 is connected to the first radiation patch 11, the third radiation patch 31 and each grounding layer of the transceiver dual-band antenna unit.

[0102] In the solution of the present application, the second radiation patch 12 is embedded inside the first radiation patch 11. This embodiment takes into account that the coupling of the transmitting electric field and the receiving electric field of the dual-frequency transmitting and receiving antenna unit can be blocked by a plurality of first conductor posts 42 arranged around the inner edge of the first radiation patch 11, thereby improving the performance of the dual-frequency transmitting and receiving antenna unit.

[0103] Each first conductor post 42 is perpendicular to each dielectric layer, that is, each first conductor post 42 is arranged perpendicular to the PCB board, and in the circuit, each first conductor post 42 needs to be connected to the first radiation patch 11 and the third radiation patch 31, and needs to be grounded. The specific number and position of the grounding layer of the dual-frequency antenna unit can be set and adjusted as needed, for example, Figure 2In the implementation manner, the grounding layer of the dual-frequency antenna unit for transmitting and receiving includes the sixth conductor layer and the fourth conductor layer. Therefore, in this implementation manner, the first end of each first conductor post 42 is connected to the first radiation patch 11 of the first conductor layer, and then in the process of vertically passing through each layer of the PCB, it needs to be connected to the third radiation patch 31 of the third conductor layer, and needs to be connected to the fourth conductor layer, and finally, the second end of the first conductor post 42 is connected to the metal ground of the sixth conductor layer.

[0104] A plurality of first conductive posts 42 are disposed around the inner edge of the first radiation patch 11 and are usually disposed at equal intervals, which can achieve a better blocking effect. Figure 3 In the example, a plurality of first conductor posts 42 are arranged at equal intervals on the inner edge of the first radiation patch 11, so that the intervals between adjacent first conductor posts 42 are consistent, thereby achieving a better blocking effect.

[0105] In the solution of the present application, the specific structure of the power division feeding unit can be set and adjusted according to actual needs, and the functional requirements of the power division feeding unit of the present application can be achieved. In a specific embodiment of the present invention, a first arc conductor 403 is provided between the first receiving end and the signal output end of the power division feeding unit, and a second arc conductor 404 is provided between the second receiving end and the signal output end of the power division feeding unit;

[0106] The center of the first arc conductor 403 coincides with the center of the second arc conductor 404, and the angle formed by the line connecting the center of the circle and the first receiving end of the power division feeding unit and the line connecting the center of the circle and the second receiving end of the power division feeding unit conforms to the preset angle range, which should be 90 degrees in an ideal case. Therefore, the preset angle range is expressed as [90°-△z, 90°+△z], where △z is a preset third error threshold to allow a certain error in accuracy.

[0107] See also Figure 5 ,for Figure 3 The schematic diagram of the structure of the fifth conductor layer of the transmit-receive co-aperture antenna array is shown in FIG. In this embodiment, the power division feeding part is arranged in the fifth conductor layer. In addition, the power division feeding part is composed of a first arc conductor 403 and a second arc conductor 404, and the center of the first arc conductor 403 coincides with the center of the second arc conductor 404, so as to achieve the purpose that the angle formed by the center of the circle, the first receiving end of the power division feeding part and the second receiving end of the power division feeding part is 90 degrees, that is, the first receiving end and the second receiving end of the power division feeding part have a phase difference of 90°, and are respectively connected to the first ends of the first feeding column 401 and the second feeding column 402, which is conducive to achieving better circular polarization characteristics.

[0108] In addition, it should be noted that the power splitter feeder needs to send the received signal to the RF signal processing device through its own signal output terminal. Figure 5 In the implementation mode, since the power division feeding part is arranged on the fifth conductor layer, and the bottom layer of the PCB board is the sixth conductor layer, the signal output end of the power division feeding part needs to be led out through a metal column to achieve connection with the radio frequency signal processing device outside the board. Figure 5 and Figure 2 The position of the metal column 405 is shown in the figure. One end of the metal column 405 is connected to the signal output end of the power splitter feeding part. After passing through the PCB board, the other end can be connected to the RF signal processing device outside the board. Of course, in other embodiments, if the power splitter feeding part is set on the top / bottom layer of the PCB board, there is no need to set such a metal column.

[0109] In a specific implementation of the present invention, it may further include: a fourth radiation patch 32 located in the b-th conductor layer, which is used to transmit signals in the second frequency band.

[0110] The second feeding portion 41 is also used to send the signal sent by the radio frequency signal processing device to the fourth radiation patch 32. The third radiation patch 31 is annular, so that the fourth radiation patch 32 is embedded in the third radiation patch 31.

[0111] In the above implementation, for the receiving structure of the dual-frequency antenna unit, a third radiation patch 31 is also provided, which can also receive signals in the first frequency band, that is, the signal is received through the first radiation patch 11 and the third radiation patch 31 at the same time, which is conducive to further improving the radiation performance of the dual-frequency antenna unit. Similarly, in this implementation, for the transmitting structure of the dual-frequency antenna unit, a fourth radiation patch 32 can be further provided, and the second feeding part 41 will not only send the signal sent by the RF signal processing device to the second radiation patch 12, but also to the fourth radiation patch 32, and both the second radiation patch 12 and the fourth radiation patch 32 can transmit signals in the second frequency band.

[0112] Similarly, the third radiation patch 31 and the fourth radiation patch 32 can be both arranged in the b-th conductor layer, and the third radiation patch 31 is annular, so that the fourth radiation patch 32 is embedded in the third radiation patch 31. In addition, in practical applications, the second radiation patch 12 and the fourth radiation patch 32 can both be circular, but there is a slight difference in their sizes, so that although the two still transmit signals in the second frequency band, there is a certain difference in their specific resonant frequencies in the second frequency band, which is conducive to ensuring the performance of the signal transmission of the dual-frequency antenna unit of the present application in the second frequency band.

[0113] In a specific embodiment of the present invention, the first radiation patch 11 is annular, the second radiation patch 12 is circular, the third radiation patch 31 is annular, the fourth radiation patch 32 is circular and one or more cut-angle structures are provided on the fourth radiation patch 32.

[0114] In this embodiment, the first radiation patch 11 and the third radiation patch 31 are both annular, and the second radiation patch 12 is circular. Such a design is convenient for production and processing, and is easy to achieve good radiation performance. The fourth radiation patch 32 is circular, but one or more cut-angle structures are provided on the fourth radiation patch 32, such as Figure 4 In the example, two centrally symmetrical cut-angle structures are provided on the fourth radiation patch 32. The setting of the cut-angle structure is conducive to achieving better circular polarization characteristics of the antenna.

[0115] In a specific implementation of the present invention, the second feeding portion 41 may be implemented by a third feeding column 410 .

[0116] The first end of the third feed pole 410 is connected to the RF signal processing device to receive the signal sent by the RF signal processing device. The third feed pole 410 is connected to the fourth radiation patch 32 and is not connected to the second radiation patch 12. The third feed pole 410 is used to send the signal sent by the RF signal processing device to the second radiation patch 12 and the fourth radiation patch 32.

[0117] In this implementation, the second feeding part 41 of the present application is implemented by the third feeding post 410. Specifically, the first end of the third feeding post 410 is connected to the radio frequency signal processing device, so as to receive the signal sent by the radio frequency signal processing device, and in this implementation, the third feeding post 410 is connected to the fourth radiation patch 32 and is not connected to the second radiation patch 12, which can widen the bandwidth of the antenna and effectively realize antenna feeding.

[0118] The second filter patch 50 needs to be connected to the second feeding part 41. When the second feeding part 41 is realized by the third feeding post 410, the second filter patch 50 is specifically connected to the third feeding post 410. As described above, the path length of the second filter patch 50 can ideally be equal to one quarter wavelength of the first frequency band. Figure 5 In the embodiment, the third feeding pole 410 vertically passes through the arc-shaped second filter patch 50.

[0119] Furthermore, in a specific implementation of the present invention, it may also include: a first coupling patch 23;

[0120] The first coupling patch 23 is connected to the second end of the third feeding post 410 to reduce the parasitic inductance introduced by the third feeding post 410 .

[0121] This implementation takes into account that in order to balance the parasitic inductance brought by the third feeding post 410 to the direct feeding of the antenna, an equivalent capacitance effect can be introduced, thereby effectively improving the performance of the antenna. The first coupling patch 23 can usually be placed between the second radiation patch 12 and the fourth radiation patch 32 to effectively introduce an equivalent capacitance. For example, in a specific implementation, the second radiation patch 12 is located on the first conductor layer, the fourth radiation patch 32 is located on the third conductor layer, and the first coupling patch 23 is located on the second conductor layer. Figure 6 In the example, the first coupling patch 23 is a circular first coupling patch 23, and in other specific implementations, the shape and size of the first coupling patch 23 can be adjusted as needed.

[0122] In a specific implementation of the present invention, it may further include: a second conductor post 43;

[0123] The second conductor post 43 is perpendicular to each dielectric layer, and the second conductor post 43 is connected to the fourth radiation patch 32 and each grounding layer of the transceiver dual-frequency antenna unit.

[0124] This embodiment introduces a second conductor column 43 connected to the fourth radiation patch 32 and each ground layer of the dual-frequency antenna unit for transmitting and receiving. For example, in the above embodiment, the fourth conductor layer and the sixth conductor layer are both ground layers of the dual-frequency antenna unit for transmitting and receiving, and the fourth radiation patch 32 is located in the third conductor layer. Figure 2 The vertical second conductor column 43 can be connected to the fourth radiation patch 32 of the third conductor layer, and connected to the fourth conductor layer and the sixth conductor layer.

[0125] The introduction of the second conductor column 43 can suppress the high-order modes of the transmitting structure in the dual-frequency antenna unit in the second frequency band, which can not only improve the radiation characteristics within the antenna band, but also effectively suppress the radiation outside the antenna band, thereby achieving a certain filtering effect.

[0126] Applying the technical solution provided in the embodiment of the present invention, the transceiver dual-frequency antenna unit includes a first radiation patch and a first feed part, the first radiation patch can receive signals in the first frequency band, and the first feed part can send the signal received by the first radiation patch to the radio frequency signal processing device. The transceiver dual-frequency antenna unit also includes a second radiation patch and a second feed part, the second radiation patch can transmit signals in the second frequency band, and the second feed part can send the signal sent by the radio frequency signal processing device to the second radiation patch. It can be seen that through such a design, the transceiver dual-frequency antenna unit of the present application effectively realizes the transmission and reception of signals in different frequency bands, that is, effectively realizes the transceiver dual-frequency antenna unit. In addition, the first radiation patch adopts a ring-shaped design, so that the second radiation patch can be embedded in the first radiation patch, which is conducive to ensuring the miniaturization of the transceiver dual-frequency antenna unit and realizing the co-aperture design of the transceiver dual-frequency antenna unit.

[0127] A first filter patch is also provided, and when the first radiation patch receives a signal in the first frequency band, the signal in the second frequency band can be suppressed during reception, thereby achieving good filtering characteristics. And / or a second filter patch is provided, and when the second radiation patch transmits a signal in the second frequency band, the signal in the first frequency band can be suppressed during transmission, thereby achieving good filtering characteristics. For example, the path lengths of the first radiation patch and the second radiation patch can be set specifically through the principle of radiation cancellation, so that for signal transmission, the interference in the receiving frequency band can be suppressed to a lower level. Similarly, for signal reception, the interference in the transmitting frequency band can be suppressed to a lower level.

[0128] In addition, the traditional dual-frequency antenna for transmitting and receiving has poor isolation between transmitting and receiving, which causes interference between the transmitting and receiving channels. In addition, the dual-frequency antenna for transmitting and receiving also needs to meet the characteristics of wide frequency band, large-angle scanning, circular polarization, and easy processing, which adds more difficulty to the design of the dual-frequency antenna for transmitting and receiving with the same aperture. In the above implementation of the present application, it is possible to ensure high isolation between transmitting and receiving, and it also has the characteristics of wide frequency band, large-angle scanning, circular polarization, and easy processing.

[0129] Corresponding to the above embodiment of the dual-frequency transmitting and receiving antenna unit, the embodiment of the present invention further provides a transmitting and receiving co-aperture antenna array, which can be referred to in correspondence with the above.

[0130] When a mobile terminal communicates with a satellite, in order to ensure the best communication link and the highest transmission rate between the two, the antenna system needs to track the signal in real time and accurately. Phased array antennas can achieve high-speed scanning and beamforming of beams without mechanical movement, so they are widely used in satellite communication systems. Therefore, in practical applications, the transmit-receive co-aperture antenna array of this application can usually be a phased array antenna.

[0131] The transmit-receive common-aperture antenna array of the present application may include a plurality of transmit-receive dual-frequency antenna units disposed on the same board. For the convenience of design, the structures of each transmit-receive dual-frequency antenna unit may be the same, and each transmit-receive dual-frequency antenna unit may be the transmit-receive dual-frequency antenna unit in any of the above embodiments.

[0132] For example, in the above Figures 3 to 6 embodiments, 4 transmit-receive dual-frequency antenna units in the transmit-receive common-aperture antenna array are shown, and their structures are the same. In addition, it should be noted that in order to improve the circular polarization axial ratio characteristic of the phased array, whether it is the array formed by the receiving structure or the array formed by the transmitting structure, the rotational array arrangement can be adopted. Taking the Figure 3 receiving structure as an example, Figure 3 the first conductor layer of 4 transmit-receive dual-frequency antenna units is shown. From the positions of the first feeding post 401 and the second feeding post 402, or from the positions of the first filtering patch 21 and the third filtering patch 22, it can be seen that although the structures of these 4 transmit-receive dual-frequency antenna units are the same, at their respective placement positions, a certain degree of rotation is performed, so that the receiving structure of the transmit-receive common-aperture antenna array realizes the rotational array arrangement. Similarly, the transmitting structure of the transmit-receive common-aperture antenna array can also realize the rotational array arrangement.

[0133] In a specific embodiment of the present invention, the transmit-receive dual-frequency antenna units in the transmit-receive common-aperture antenna array are arranged in a cross shape, so that in the x-axis direction, the distance between any two adjacent transmit-receive dual-frequency antenna units is d 1 , and in the y-axis direction, the distance between any two adjacent transmit-receive dual-frequency antenna units is d 1 ;

[0134] wherein, the x-axis and the y-axis are respectively the horizontal axis and the vertical axis of the transmit-receive common-aperture antenna array, and d 1 is a preset first distance.

[0135] There are a plurality of transmit-receive dual-frequency antenna units in the transmit-receive common-aperture antenna array. The specific array form can be set and adjusted according to actual needs. In this embodiment, the transmit-receive dual-frequency antenna units in the transmit-receive common-aperture antenna array are arranged in a cross shape, that is, the transmit-receive common-aperture antenna array can be regarded as being composed of a plurality of cross-shaped array units. Each cross-shaped array unit includes 4 transmit-receive dual-frequency antenna units, which are arranged in a cross shape. Figure 3 shows a single cross-shaped array unit. Such a design can make the distance between any two adjacent transmit-receive dual-frequency antenna units be d 1 in the x-axis direction, and the distance between any two adjacent transmit-receive dual-frequency antenna units be d 1 in the y-axis direction. For example, d1 Specifically 7.5mm.

[0136] In a specific embodiment of the present invention, a transmitting single-frequency antenna is also arranged at the center of the t-shaped structure formed by every four transmitting and receiving dual-frequency antenna units, and the structure of the transmitting single-frequency antenna is the same as the transmitting structure in each transmitting and receiving dual-frequency antenna unit.

[0137] This implementation takes into account that when the transmit and receive dual-frequency antenna units in the transmit and receive co-aperture antenna array are arranged in a field shape, there is a certain space in the center of the field-shaped structure formed by every four transmit and receive dual-frequency antenna units. The space can be used to set a transmitting single-frequency antenna, and the structure of the transmitting single-frequency antenna can be the same as the transmitting structure in each transmit and receive dual-frequency antenna unit, so as to effectively improve the transmission performance of the antenna without increasing the design cost.

[0138] For example Figure 3 , a transmitting single-frequency second radiation patch 122 of the transmitting single-frequency antenna located on the first conductor layer is shown, and its structure is consistent with the structure of the second radiation patch 12 of the transmitting and receiving dual-frequency antenna unit. Figure 4 In FIG. 3 , the fourth single-frequency transmitting radiating patch 322 of the transmitting single-frequency antenna located in the third conductor layer is shown, and its structure is consistent with the structure of the fourth radiating patch 32 in the transmitting and receiving dual-frequency antenna unit. Figure 5 In the figure, a second filter patch of a transmitting single-frequency antenna located on the fifth conductor layer is shown, which is marked with 500 and has the same structure as the second filter patch 50 in the transmitting and receiving dual-frequency antenna unit. Figure 6 , a transmitting single-frequency first coupling patch 233 of a transmitting single-frequency antenna located on the second conductor layer is shown, and its structure is consistent with the structure of the first coupling patch 23 in the transmitting and receiving dual-frequency antenna unit.

[0139] Figure 3 The figure also shows the distance between the transmitting single-frequency antenna and the adjacent transmitting and receiving dual-frequency antenna unit, which is denoted as d 2 , for example 2 Specifically, it is 5.3mm. By adopting the above-mentioned dual-frequency antenna units for transmission and reception in a field-shaped arrangement, and a single-frequency transmitting antenna is also arranged in the center of the field-shaped structure, and d 1 and d 2 After the distance design, it can not only meet the characteristics of large-angle scanning of the first frequency band and the second frequency band at the same time, but also effectively suppress the generation of array coral petals.

[0140] In a specific embodiment of the present invention, a conductor shielding tape 60 and a conductor shielding column 61 may also be included;

[0141] The conductor shielding column 61 is used to ground the conductor shielding tape 60;

[0142] The conductor shielding tape 60 is used to surround each of the dual-band transmitting and receiving antenna units to perform electrical isolation between the dual-band transmitting and receiving antenna units.

[0143] This embodiment takes into account that each dual-band transmitting and receiving antenna unit can be surrounded by a conductor shielding tape 60, and after the conductor shielding tape 60 is grounded through a conductor shielding column 61, electrical isolation between each dual-band transmitting and receiving antenna unit can be effectively achieved.

[0144] It can be understood that if, as in the above embodiment, a transmitting single-frequency antenna is also provided at the center of the 'T'-shaped structure formed by each of the four transmitting and receiving dual-frequency antenna units, the conductor shielding tape 60 will also surround each transmitting single-frequency antenna, so that each transmitting single-frequency antenna can be electrically isolated from each of the surrounding transmitting and receiving dual-frequency antenna units. Figure 3 In the implementation mode, each receiving and transmitting dual-frequency antenna unit is surrounded by a conductor shielding tape 60, and the transmitting single-frequency antenna is also surrounded to achieve a better isolation effect.

[0145] In practical applications, since the conductor shielding tape 60 extends over a long distance and is disposed on the entire PCB board, a conductor shielding column 61 can usually be disposed at a short distance to achieve a better grounding effect. In practical applications, after applying the solution of the present application, the isolation in the first frequency band can be greater than 36dB, and the isolation in the second frequency band can be greater than 30dB.

[0146] It should also be noted that, in this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0147] Those skilled in the art may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in this application can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. Specific examples are used in this application to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A dual-frequency transmitting and receiving antenna unit, characterized in that: include: A first radiation patch, used for receiving signals in a first frequency band; a first feeding unit, used for sending the signals received by the first radiation patch to a radio frequency signal processing device; A second radiation patch, used for transmitting a signal in a second frequency band; a second feeding unit, used for transmitting the signal sent by the radio frequency signal processing device to the second radiation patch; The first radiation patch is annular, so that the second radiation patch is embedded in the first radiation patch; It also includes: a first filter patch connected to the first feeding portion and configured to suppress signals in the second frequency band when the first radiation patch receives signals in the first frequency band; And / or a second filter patch connected to the second feeding portion and used to suppress signals in the first frequency band when the second radiation patch transmits signals in the second frequency band.

2. The dual-frequency transmitting and receiving antenna unit according to claim 1, characterized in that: The path length of the first filter patch conforms to a first length range; The first length range is expressed as [X-△x, X+△x], where X is a quarter wavelength of the second frequency band, and △x is a preset first error threshold; The path length of the second filter patch conforms to a second length range; The second length range is expressed as [Y-△y, Y+△y], where Y is a quarter wavelength of the first frequency band, and △y is a preset second error threshold.

3. The dual-frequency transmitting and receiving antenna unit according to claim 1, characterized in that: The dual-frequency transmitting and receiving antenna unit includes n-1 dielectric layers and n conductor layers, where n is a positive integer not less than 2, and the first radiation patch and the second radiation patch are both located in the ath conductor layer, where a is a positive integer and 1≤a≤n; The first feeding part includes: a first feeding post, a second feeding post and a power splitting feeding part; the power splitting feeding part is located in the cth conductor layer; c is a positive integer and 1<c<n, and the c+1th conductor layer and the c-1th conductor layer are both ground layers; the first filter patch is connected to the first feeding post; The first end of the first feeding post is connected to the first receiving end of the power division feeding part, and the second end of the first feeding post is used to receive the signal originated from the first radiation patch to send it to the power division feeding part; the first end of the second feeding post is connected to the second receiving end of the power division feeding part, and the second end of the second feeding post is used to receive the signal originated from the first radiation patch to send it to the power division feeding part; the power division feeding part is used to send the received signal to the RF signal processing device through its own signal output end.

4. The dual-frequency transmitting and receiving antenna unit according to claim 3, characterized in that: Also includes: The third filter patch connected to the second feeding pole is used to suppress signals in the second frequency band when the first radiation patch receives signals in the first frequency band.

5. The dual-frequency transmitting and receiving antenna unit according to claim 3, characterized in that: A first arc conductor is provided between the first receiving end of the power division and feeding part and the signal output end, and a second arc conductor is provided between the second receiving end of the power division and feeding part and the signal output end; The center of the first arc conductor coincides with the center of the second arc conductor, and an angle formed by a line connecting the center of the circle and the first receiving end of the power division feeding unit and a line connecting the center of the circle and the second receiving end of the power division feeding unit conforms to a preset angle range; The preset angle range is expressed as [90°-△z, 90°+△z], where △z is a preset third error threshold.

6. The dual-frequency transmitting and receiving antenna unit according to claim 1, characterized in that: The second feeder comprises: a third feed post; The first end of the third feeding pole is connected to the RF signal processing device to receive the signal sent by the RF signal processing device, and the second end of the third feeding pole is used to send the signal sent by the RF signal processing device to the second radiation patch; The second filter patch is connected to the third feeding post.

7. The dual-frequency transmitting and receiving antenna unit according to claim 6, characterized in that: Also includes: A first coupling patch; The first coupling patch is connected to the second end of the third feeding column to reduce the parasitic inductance introduced by the third feeding column.

8. The dual-frequency transmitting and receiving antenna unit according to claim 3, characterized in that: Also includes: A third radiation patch located in the b-th conductor layer, used for receiving signals in the first frequency band; wherein b is a positive integer and 1≤a<b<c<n; Accordingly, the second end of the first feeding column is specifically used to: receive signals from the first radiation patch and the third radiation patch to send to the power division feeding part; The second end of the second feeding column is specifically used to: receive signals from the first radiation patch and the third radiation patch to send to the power division feeding part; The first feed post and the second feed post are both perpendicular to each dielectric layer; the first feed post is not connected to the first radiation patch and is not connected to the third radiation patch; the second feed post is not connected to the first radiation patch and is not connected to the third radiation patch.

9. The dual-frequency transmitting and receiving antenna unit according to claim 8, characterized in that: Also includes: A plurality of first conductor posts are arranged around the inner edge of the first radiation patch; each of the first conductor posts is perpendicular to each dielectric layer, and each of the first conductor posts is connected to the first radiation patch, the third radiation patch and each grounding layer of the transceiver dual-band antenna unit.

10. The dual-frequency transmitting and receiving antenna unit according to claim 8, characterized in that: Also includes: A fourth radiation patch located in the b-th conductor layer, used for transmitting signals in the second frequency band; The second feeding unit is also used to send the signal sent by the radio frequency signal processing device to the fourth radiation patch; the third radiation patch is ring-shaped, so that the fourth radiation patch is embedded in the third radiation patch.

11. The dual-frequency transmitting and receiving antenna unit according to claim 10, characterized in that: The first radiation patch is in the shape of a ring, the second radiation patch is in the shape of a circle, the third radiation patch is in the shape of a ring, the fourth radiation patch is in the shape of a circle and one or more cut-angle structures are arranged on the fourth radiation patch.

12. The dual-frequency transmitting and receiving antenna unit according to claim 10, characterized in that: Also includes: a second conductor post; The second conductor column is perpendicular to each dielectric layer, and the second conductor column is connected to the fourth radiation patch and each grounding layer of the transceiver dual-frequency antenna unit.

13. A transmitting and receiving common aperture antenna array, characterized in that: It comprises a plurality of dual-frequency transmitting and receiving antenna units arranged on the same board, and the structure of each dual-frequency transmitting and receiving antenna unit is the same, and each dual-frequency transmitting and receiving antenna unit is a dual-frequency transmitting and receiving antenna unit as claimed in any one of claims 1 to 12.

14. The transmitting and receiving common aperture antenna array according to claim 13, characterized in that: The transceiver dual-frequency antenna units in the transceiver co-aperture antenna array are arranged in a field shape, so that the spacing between any adjacent transceiver dual-frequency antenna units in the x-axis direction is d1, and the spacing between any adjacent transceiver dual-frequency antenna units in the y-axis direction is d1; Among them, the x-axis and the y-axis are respectively the horizontal axis and the vertical axis of the transmit-receive co-aperture antenna array, and d1 is a preset first spacing.

15. The transmitting and receiving common aperture antenna array according to claim 14, characterized in that: A transmitting single-frequency antenna unit is also arranged at the center of the field-shaped structure formed by each of the four transmitting and receiving dual-frequency antenna units, and the structure of the transmitting single-frequency antenna unit is the same as the transmitting structure in each of the transmitting and receiving dual-frequency antenna units.

16. The transmitting and receiving common aperture antenna array according to claim 13, characterized in that: Also included are conductor shielding tapes and conductor shielding posts; The conductor shielding column is used to ground the conductor shielding tape; The conductor shielding tape is used to surround each of the dual-frequency transmitting and receiving antenna units to perform electrical isolation between the dual-frequency transmitting and receiving antenna units.

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