Three-mode patch antenna and electronic equipment

Abstract

The embodiment of the invention provides a three-mode patch antenna and electronic equipment. The three-mode patch antenna comprises a reference ground; the patch comprises a first side edge and a corner part opposite to the first side edge, the first side edge is electrically connected with the reference ground, a feeding point is arranged on the patch, the feeding point is close to the corner part, and the feeding point is used for feeding in an excitation signal; wherein the patch generates first resonance, second resonance and third resonance when transmitting an excitation signal, the first resonance is quarter-wavelength resonance, the second resonance is half-wave resonance, and the third resonance comprises annular resonance and three-quarter-wavelength resonance. According to the three-mode patch antenna provided by the embodiment of the invention, through the position design of the feeding point, the feeding point is close to the corner part, so that the three-mode patch antenna can realize three-mode work, the antenna bandwidth can be expanded, and the communication performance is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a three-mode patch antenna and electronic equipment. Background Art

[0002] Electronic devices such as smartphones are usually equipped with multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, WIFI antennas, etc., to achieve corresponding communication functions.

[0003] In the related art, frame antennas are widely studied for antenna design in electronic devices. However, frame antennas are highly dependent on frame size and antenna performance is relatively limited.

[0004] Therefore, how to design the antenna of an electronic device to expand the bandwidth of the antenna has become a difficult point in antenna design. Summary of the invention

[0005] The embodiments of the present application provide a three-mode patch antenna and an electronic device, which can realize three-mode operation, expand the antenna bandwidth, and improve the communication performance.

[0006] The present application provides a three-mode patch antenna, including:

[0007] Reference place;

[0008] A patch, the patch comprising a first side and a corner opposite to the first side, the first side being electrically connected to the reference ground, a feeding point being arranged on the patch, the feeding point being close to the corner, and the feeding point being used to feed an excitation signal;

[0009] Wherein, the patch generates a first resonance, a second resonance, and a third resonance when transmitting the excitation signal, the first resonance is a quarter-wavelength resonance, the second resonance is a half-wavelength resonance, and the third resonance includes a ring resonance and a three-quarter-wavelength resonance.

[0010] An embodiment of the present application also provides an electronic device, comprising the above-mentioned three-mode patch antenna.

[0011] The three-mode patch antenna provided in the embodiment of the present application designs the position of the feeding point so that the feeding point is close to the corner. Therefore, the three-mode patch antenna can achieve three-mode operation, thereby expanding the antenna bandwidth and improving communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0013] Figure 1 This is a schematic diagram of the first structure of the three-mode patch antenna according to an embodiment of the present application.

[0014] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the three-mode patch antenna shown.

[0015] Figure 3 for Figure 1 A schematic diagram of a first structure of the patch of the triple-mode patch antenna is shown.

[0016] Figure 4 Schematic diagram of current distribution of the first resonance of the three-mode patch antenna according to an embodiment of the present application.

[0017] Figure 5 Schematic diagram of the electric field distribution of the first resonance of the three-mode patch antenna according to an embodiment of the present application.

[0018] Figure 6 Schematic diagram of magnetic current distribution of the first resonance of the three-mode patch antenna according to an embodiment of the present application.

[0019] Figure 7 Schematic diagram of current distribution of the second resonance of the three-mode patch antenna according to an embodiment of the present application.

[0020] Figure 8 Schematic diagram of the electric field distribution of the second resonance of the three-mode patch antenna according to an embodiment of the present application.

[0021] Fig. 9 Schematic diagram of magnetic current distribution of the second resonance of the three-mode patch antenna according to an embodiment of the present application.

[0022] Fig.10 Schematic diagram of current distribution of the third resonance of the three-mode patch antenna according to an embodiment of the present application.

[0023] Fig.11 Schematic diagram of the electric field distribution of the third resonance of the three-mode patch antenna according to an embodiment of the present application.

[0024] Fig.12 Schematic diagram of magnetic current distribution of the third resonance of the three-mode patch antenna according to an embodiment of the present application.

[0025] Fig.13 Schematic diagram of simulation results of the three-mode patch antenna according to an embodiment of the present application.

[0026] Fig.14 for Figure 1 A second structural schematic diagram of the patch of the triple-mode patch antenna is shown.

[0027] Fig.15 This is a schematic diagram of S parameter comparison of the three-mode patch antenna according to an embodiment of the present application.

[0028] Fig.16 This is a second structural schematic diagram of the three-mode patch antenna according to an embodiment of the present application.

[0029] Fig.17 for Fig.16 A schematic diagram of the structure of the matching module of the three-mode patch antenna shown.

[0030] Fig.18 for Fig.17 Schematic diagram of the application of each matching path of the matching module shown.

[0031] Fig.19 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] The present application provides a three-mode patch antenna, which can be applied to electronic devices, such as smart phones, foldable phones, tablet computers, gaming devices, AR (Augmented Reality) devices, cars, laptops, desktop computing devices, etc.

[0034] refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the first structure of the three-mode patch antenna 10 according to an embodiment of the present application. Figure 2 for Figure 1 The three-dimensional structural diagram of the three-mode patch antenna 10 is shown. Figure 3 for Figure 1 A schematic diagram of a first structure of the patch 12 of the triple-mode patch antenna is shown.

[0035] The three-mode patch antenna 10 includes a reference ground 11 and a patch 12. Among them, the reference ground 11 can be marked as GND. The reference ground 11 can be formed by a metal structure or a metal component of an electronic device. For example, the reference ground 11 can be formed by a metal structure such as a metal front shell, a battery, or the like of an electronic device, wherein the metal front shell can also be understood as a middle frame. If the electronic device is a foldable device such as a foldable mobile phone, the reference ground 11 can also be formed by half of the metal front shell of the foldable device. In addition, the system ground on the mainboard of the electronic device can also be used as the reference ground 11. It should be noted that the above-mentioned method of forming the reference ground 11 is only an example. In actual applications, the reference ground 11 can also be formed by other methods, and this application does not specifically limit this.

[0036] The patch 12 may be marked as Patch. The patch 12 is electrically connected to the reference ground 11. In some embodiments, the patch 12 may be quadrilateral, for example, square, rectangular, etc. The patch 12 includes a first side 121, a second side 122, a third side 123, and a fourth side 124. The first side 121, the second side 122, the third side 123, and the fourth side 124 are connected in sequence. The connection portion between the second side 122 and the third side 123 forms a corner 125. The corner 125 is opposite to the first side 121.

[0037] The first side 121 is electrically connected to the reference ground 11. For example, the three-mode patch antenna 10 further includes a metal connector 13. The metal connector 13 may be, for example, a metal structure such as a metalized via, a conductive column, a metal pin, or a metal spring. The first side 121 may be connected to the reference ground 11 through the metal connector 13 to achieve electrical connection between the first side 121 and the reference ground 11.

[0038] In an application example, the second side 122 and the fourth side 124 are long sides, and the first side 121 and the third side 123 are short sides. That is, the length of the second side 122 is greater than the length of the first side 121, and also greater than the length of the third side 123. The length of the fourth side 124 is greater than the length of the first side 121, and also greater than the length of the third side 123.

[0039] In some embodiments, the patch 12 is a half-mode patch. Compared with a conventional one-mode patch, a half-mode patch has better performance and smaller size, can save nearly half of the space, and is more flexible in design.

[0040] A feeding point 126 is provided on the patch 12. The feeding point 126 is close to the corner 125. In practical applications, the feeding point 126 can be set to be close to the edge of the corner 125. The feeding point 126 is used to feed an excitation signal, and the patch 12 can transmit the excitation signal and excite the corresponding resonance, thereby radiating a wireless signal to the outside world. The excitation signal may include at least one of a 4G excitation signal, a 5G excitation signal, a WIFI excitation signal, and a Bluetooth excitation signal.

[0041] In the embodiment of the present application, the patch 12 generates a first resonance, a second resonance, and a third resonance when transmitting the excitation signal. The first resonance is a quarter-wavelength resonance, for example, a quarter-wavelength TM 1 / 2 0 mode resonance. The second resonance is a half-wavelength resonance, for example, a half-wavelength TM 1 / 2 1 mode resonance. The third resonance includes a ring resonance and a three-quarter wavelength resonance, for example, a ring (loop) mode resonance and a three-quarter wavelength TM 1 3 / 2 mode resonance.

[0042] In some embodiments, the first resonance and the third resonance may both be WIFI resonances, and the second resonance may be a resonance for 5G communication. Among them, the frequency range of the first resonance covers the 2.4 GHz band of WIFI, and its frequency range is 2.4 GHz to 2.5 GHz. The frequency range of the second resonance covers the N79 band of 5G communication, and its frequency range is 4.4 GHz to 5 GHz. The frequency range of the third resonance covers the 5 GHz band of WIFI, and its frequency range is 5.15 GHz to 5.85 GHz. Therefore, the three-mode patch antenna 10 can cover the dual-band WIFI and the N79 band of 5G.

[0043] In some embodiments, the frequency range of the first resonance can also cover the high frequency band (HB), specifically, the frequency range can cover 2400MHz to 3800MHz. Therefore, the three-mode patch antenna 10 can achieve coverage of dual-band WIFI, high-frequency HB and 5G N79 band.

[0044] refer to Figures 4 to 6 , Figure 4 Schematic diagram of current distribution of the first resonance of the three-mode patch antenna 10 according to an embodiment of the present application, Figure 5 Schematic diagram of the electric field distribution of the first resonance of the three-mode patch antenna 10 according to an embodiment of the present application, Figure 6 Schematic diagram of magnetic current distribution of the first resonance of the three-mode patch antenna 10 according to an embodiment of the present application.

[0045] The current direction of the first resonance is from the third side 123 to the first side 121. The electric field distribution of the first resonance gradually increases from the first side 121 to the third side 123. The first resonance forms a quarter-wavelength magnetic current at the second side 122 and the fourth side 124. The first resonance can be a quarter-wavelength TM 1 / 2 0 mode resonance.

[0046] refer to Figures 7 to 9 , Figure 7 Schematic diagram of current distribution of the second resonance of the three-mode patch antenna 10 according to an embodiment of the present application, Figure 8 Schematic diagram of the electric field distribution of the second resonance of the three-mode patch antenna 10 according to an embodiment of the present application, Fig. 9 Schematic diagram of magnetic current distribution of the second resonance of the three-mode patch antenna 10 according to an embodiment of the present application.

[0047] Among them, the current direction of the second resonance is from the fourth side 124 to the second side 122. The electric field distribution of the second resonance gradually increases from the first side 121 to the third side 123, and presents electric field distributions in opposite directions and away from each other on both sides of the patch 12. The second resonance forms a quarter-wavelength magnetic current on the second side 122 and the fourth side 124, and a half-wavelength magnetic current on the first side 121 and the third side 123, and the first side 121 and the third side 123 have magnetic current zero points. The second resonance can be a half-wavelength TM 1 / 2 1 mode resonance.

[0048] refer to Figures 10 to 12 , Fig.10 Schematic diagram of current distribution of the third resonance of the three-mode patch antenna 10 of the embodiment of the present application, Fig.11 Schematic diagram of the electric field distribution of the third resonance of the three-mode patch antenna 10 of the embodiment of the present application, Fig.12 Schematic diagram of magnetic current distribution of the third resonance of the three-mode patch antenna 10 according to an embodiment of the present application.

[0049] Among them, the current of the third resonance includes a circular current from the first side 121 to the third side 123 and a current from the fourth side 124 to the second side 122. The circular current from the first side 121 to the third side 123 forms a loop resonance, and the current from the fourth side 124 to the second side 122 forms a three-quarter wavelength resonance. The electric field distribution of the third resonance gradually increases from the first side 121 to the third side 123, and presents an electric field distribution in opposite directions on both sides of the patch 12. The third resonance forms a half-wavelength magnetic current on the second side 122 and the fourth side 124, and forms a three-quarter wavelength magnetic current on the first side 121 and the third side 123, and the first side 121 and the third side 123 have a magnetic current zero point.

[0050] refer to Fig.13 , Fig.13 Schematic diagram of simulation results of the three-mode patch antenna 10 of the embodiment of the present application. Wherein, L1 is the S parameter curve of the three-mode patch antenna 10. Point 1 represents the frequency of the first resonance, for example, 2.5359 GHz. Point 2 represents the frequency of the second resonance, for example, 4.4412 GHz. Point 3 represents the frequency of the third resonance, for example, 5.7437 GHz. L2 is the total radiation efficiency curve of the three-mode patch antenna 10. L3 is the theoretical radiation efficiency curve of the three-mode patch antenna 10.

[0051] The three-mode patch antenna 10 provided in the embodiment of the present application designs the position of the feeding point 126 so that the feeding point 126 is close to the corner 125. Therefore, the three-mode patch antenna 10 can achieve three-mode operation, thereby expanding the antenna bandwidth and improving communication performance.

[0052] In some embodiments, reference Fig.14 , Fig.14 for Figure 1 A second structural schematic diagram of the patch 12 of the triple-mode patch antenna is shown.

[0053] A gap may be provided on at least one of the third side 123 and the fourth side 124. Fig.14 As shown, the third side 123 is provided with a first slit 127, which is oriented toward the first side 121; the fourth side 124 is provided with a second slit 128, which is oriented toward the second side 122. Both the first slit 127 and the second slit 128 penetrate the patch 12 in the thickness direction of the patch 12.

[0054] It is understandable that in some other embodiments, the first slit 127 may be provided only on the third side 123 , without providing the second slit 128 on the fourth side 124 ; or the second slit 128 may be provided only on the fourth side 124 , without providing the first slit 127 on the third side 123 .

[0055] In practical applications, the first slot 127 is provided on the third side 123, so that the electrical length of the third side 123 can be increased, thereby increasing the electrical length of the second resonance, and thus the frequency of the second resonance can be adjusted. The second slot 128 is provided on the fourth side 124, so that the electrical length of the fourth side 124 can be increased, thereby increasing the electrical length of the first resonance, and thus the frequency of the first resonance can be adjusted. The first slot 127 and the second slot 128 have little effect on the electrical length of the third resonance, and thus have little effect on the frequency of the third resonance.

[0056] refer to Fig.15 , Fig.15Schematic diagram of S parameter comparison of the three-mode patch antenna 10 of the embodiment of the present application. Among them, L1, point 1, point 2, point 3 and Fig.13 The meanings are the same as in, and are not repeated here. L4 is a schematic diagram of S parameters after the first slot 127 and the second slot 128 are opened. Point 4 is the frequency of the second resonance after the first slot 127 and the second slot 128 are opened, for example, 4.2904 GHz. Point 5 is the frequency of the first resonance after the first slot 127 and the second slot 128 are opened, for example, 2.5087 GHz. Point 6 is the frequency of the third resonance after the first slot 127 and the second slot 128 are opened, for example, 5.7392 GHz.

[0057] By comparing point 1 and point 5, it can be seen that after the first slit 127 and the second slit 128 are opened, the frequency of the first resonance is significantly shifted, and the shift is about 27.2MHz. By comparing point 2 and point 4, it can be seen that after the first slit 127 and the second slit 128 are opened, the frequency of the second resonance is significantly shifted, and the shift is about 150.8MHz. By comparing point 3 and point 6, it can be seen that after the first slit 127 and the second slit 128 are opened, the frequency of the third resonance changes very little, and the shift is about 6.7MHz. Therefore, the first slit 127 and the second slit 128 have basically no effect on the frequency of the third resonance.

[0058] In some embodiments, reference Fig.16 , Fig.16 This is a schematic diagram of the second structure of the three-mode patch antenna 10 according to an embodiment of the present application.

[0059] The three-mode patch antenna 10 further includes a feed source 14 and a matching module M. The feed source 14 and the matching module M may be disposed on a circuit board, for example, on a main board of an electronic device, or on an independent small board.

[0060] The feed source 14 is used to provide the above-mentioned excitation signal, for example, the above-mentioned 4G excitation signal, 5G excitation signal, WIFI excitation signal, Bluetooth excitation signal, etc. The matching module M is connected between the feeding point 126 and the feed source 14. The matching module M is used to perform impedance matching on the patch 12 to switch the frequency band of the wireless signal radiated by the three-mode patch antenna 10.

[0061] In some embodiments, reference Fig.17 and Fig.18 , Fig.17 for Fig.16 The schematic diagram of the structure of the matching module of the three-mode patch antenna is shown. Fig.18 for Fig.17 Schematic diagram of the application of each matching path of the matching module shown.

[0062] The matching module M includes a plurality of matching paths M1 and a switch K. The impedances of the plurality of matching paths M1 are different, and the specific impedance of each matching path M1 can be set according to actual needs. In practical applications, each matching path M1 can include one or more of an inductor and a capacitor. When the matching path M1 includes both an inductor and a capacitor, the inductor and the capacitor can be connected in series or in parallel. The plurality of matching paths M1 are all grounded.

[0063] The switch K is a single-pole multi-throw switch, for example, a switch with a single-pole multi-throw switch function formed by semiconductor devices such as transistors and switch tubes. One end of the switch K is connected between the feed point 126 and the feed source 14, and the other end is used to select and connect one of the multiple matching paths M1 to switch the frequency band of the wireless signal radiated by the three-mode patch antenna 10.

[0064] In practical applications, the matching path M1 can be implemented in a variety of forms, for example, it can include only inductance, only capacitance, or both inductance and capacitance. When the matching path M1 includes both inductance and capacitance, its specific implementation form can be: Fig.18 Any one of A to H shown.

[0065] Among them, A is the inductor and capacitor connected in series. B is the capacitor and inductor connected in parallel. C is the capacitor and inductor connected in parallel to form a parallel unit, and then the parallel unit is connected in series with the capacitor. D is the capacitor and inductor connected in parallel to form a parallel unit, and then the parallel unit is connected in series with the inductor. E is the inductor and capacitor connected in series to form a series unit, and then the series unit is connected in parallel with the capacitor. F is the inductor and capacitor connected in series to form a series unit, and then the series unit is connected in parallel with the inductor. G is the capacitor and inductor connected in parallel to form a parallel unit, and then the two parallel units are connected in series. H is the inductor and capacitor connected in series to form a series unit, and then the two series units are connected in parallel.

[0066] It should be noted that Fig.18 The structures A to H shown are only feasible examples. In practical applications, the matching path M1 may also be other circuit structures, which are not listed here.

[0067] The embodiment of the present application also provides an electronic device. The electronic device may be a smart phone, a foldable phone, a tablet computer, or other device, and may also be a gaming device, an AR (Augmented Reality) device, a car, a laptop computer, a desktop computing device, or the like.

[0068] refer to Fig.19 , Fig.19 The electronic device 100 is a schematic diagram of the structure of the electronic device 100 provided in an embodiment of the present application. The electronic device 100 includes the three-mode patch antenna 10 of any of the above embodiments and a housing 20. The three-mode patch antenna 10 is disposed in the housing 20.

[0069] Understandably, although Fig.19 Not shown, the electronic device 100 may also include functional components such as a main board, a battery, a display screen, a camera module, etc., which are not described in detail here.

[0070] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0071] It should be pointed out that in the embodiments of the present application, “electrical connection” can be a direct connection between two electrical components to achieve electrical connection, or it can be an indirect connection to achieve electrical connection.

[0072] The above is a detailed introduction to the three-mode patch antenna and electronic device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A three-mode patch antenna, characterized in that: include: Reference place; A patch, the patch comprising a first side and a corner opposite to the first side, the first side being electrically connected to the reference ground, a feeding point being arranged on the patch, the feeding point being close to the corner, and the feeding point being used to feed an excitation signal; Wherein, the patch generates a first resonance, a second resonance, and a third resonance when transmitting the excitation signal, the first resonance is a quarter-wavelength resonance, the second resonance is a half-wavelength resonance, and the third resonance includes a ring resonance and a three-quarter-wavelength resonance.

2. The three-mode patch antenna according to claim 1, characterized in that: The patch further includes a second side, a third side, and a fourth side, wherein the first side, the second side, the third side, and the fourth side are connected in sequence; The second side and the fourth side are long sides, and the first side and the third side are short sides; The connecting portion between the second side and the third side forms the corner.

3. The three-mode patch antenna according to claim 2, characterized in that: The current direction of the first resonance is from the third side toward the first side; The first resonance forms a quarter-wavelength magnetic current on the second side and the fourth side.

4. The three-mode patch antenna according to claim 2, characterized in that: The current direction of the second resonance is from the fourth side toward the second side; The second resonance forms a quarter-wavelength magnetic current on the second side and the fourth side, and forms a half-wavelength magnetic current on the first side and the third side, and the first side and the third side have magnetic current zero points.

5. The three-mode patch antenna according to claim 2, characterized in that: The third resonant current includes a circular current from the first side toward the third side and a current from the fourth side toward the second side; The third resonance forms a half-wavelength magnetic current on the second side and the fourth side, and forms a three-half-wavelength magnetic current on the first side and the third side. The first side and the third side have magnetic current zero points.

6. The three-mode patch antenna according to any one of claims 2 to 5, characterized in that: The third side is provided with a first slit, and the direction of the first slit is toward the first side; and / or The fourth side is provided with a second slit, and the direction of the second slit is toward the second side.

7. The three-mode patch antenna according to any one of claims 1 to 5, characterized in that: The frequency range of the first resonance covers the 2.4 GHz frequency band of WIFI, the frequency range of the second resonance covers the N79 frequency band of 5G communication, and the frequency range of the third resonance covers the 5 GHz frequency band of WIFI.

8. The three-mode patch antenna according to claim 7, characterized in that: The frequency range of the first resonance also covers 2400 MHz to 3800 MHz.

9. The three-mode patch antenna according to any one of claims 1 to 5, characterized in that: Also includes: A feed source, used for providing the excitation signal; A matching module is connected between the feeding point and the feed source, and is used to perform impedance matching on the patch.

10. The three-mode patch antenna according to claim 9, characterized in that: The matching module comprises: A plurality of matching paths, each of which has a different impedance and is grounded; A switching switch has one end connected between the feeding point and the feed source, and the other end is used to select and connect one of the multiple matching paths.

11. An electronic device, characterized in that: The invention comprises a three-mode patch antenna as described in any one of claims 1 to 10.

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