Three-mode patch antenna and electronic device

Abstract

Embodiments of the present application provide a three-mode patch antenna and an electronic device, the three-mode patch antenna comprising: a reference ground; 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, the patch being provided with a feed point, the feed point being close to the corner, the feed point being used for feeding 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-wave resonance, and the third resonance comprises a ring resonance and a three-quarter-wavelength resonance. The three-mode patch antenna provided by the embodiments of the present application can realize three-mode operation by designing the position of the feed point, so that the feed point is close to the corner, thereby expanding the antenna bandwidth and improving the communication performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a three-mode patch antenna and an electronic device. BACKGROUND

[0002] Electronic devices such as smart phones usually have multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, WIFI antennas, etc., to realize corresponding communication functions.

[0003] In related technologies, there are more studies on the frame antenna for the design of the antenna in the electronic device. However, the frame antenna is highly dependent on the frame size, and the performance of the antenna is relatively limited.

[0004] Therefore, how to design the antenna of the electronic device to expand the bandwidth of the antenna has become a difficulty in the design of the antenna. SUMMARY

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

[0006] The embodiments of the present application provide a three-mode patch antenna, which comprises:

[0007] a reference ground;

[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, the patch being provided with a feed point, the feed point being close to the corner, and the feed point being used for feeding 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 wave resonance, and the third resonance comprises a ring resonance and a three-quarter wavelength resonance.

[0010] The embodiments of the present application also provide an electronic device comprising the three-mode patch antenna.

[0011] The three-mode patch antenna provided by the embodiments of the present application can realize three-mode operation by designing the position of the feed point to be close to the corner, thereby expanding the bandwidth of the antenna and improving the communication performance. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

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

[0014] Figure 2 A three-dimensional structure schematic diagram of the three-mode patch antenna shown in Figure 1

[0015] Figure 3 A first structure schematic diagram of a patch of the three-mode patch antenna shown in Figure 1

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

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

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

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

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

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

[0022] Figure 10 A current distribution schematic diagram of a third resonance of the three-mode patch antenna according to an embodiment of the present application.

[0023] Figure 11 A field distribution schematic diagram of the third resonance of the three-mode patch antenna according to an embodiment of the present application.

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

[0025] Figure 13 A simulation result schematic diagram of the three-mode patch antenna according to an embodiment of the present application. ​​

[0026] Figure 14 As shown in FIG. 1, Figure 1 As shown in FIG. 2,

[0027] Figure 15 As shown in FIG. 3,

[0028] Figure 16 As shown in FIG. 4,

[0029] Figure 17 As shown in FIG. 5, Figure 16 As shown in FIG. 6,

[0030] Figure 18 As shown in FIG. 7, Figure 17 As shown in FIG. 8,

[0031] Figure 19 As shown in FIG. 9, DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The embodiments of the present application provide a three-mode patch antenna, which can be applied to an electronic device. The electronic device can be a smart phone, a foldable phone, a tablet computer, etc., and can also be a game device, an AR (Augmented Reality) device, a car, a notebook computer, a desktop computing device, etc.

[0034] Reference is made to Figures 1 to 3 , Figure 1 As shown in FIG. 1, Figure 2 As shown in FIG. 2, Figure 1 As shown in FIG. 3, Figure 3 As shown in FIG. 4, Figure 1 As shown in FIG. 5,

[0035] The three-mode patch antenna 10 includes a reference ground 11 and a patch 12. 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 front shell of the electronic device, which can also be understood as a middle frame, a metal structure such as a battery, and the like. If the electronic device is a foldable device such as a foldable mobile phone, the reference ground 11 can also be formed by a half 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 ways of forming the reference ground 11 are only examples, and the reference ground 11 can also be formed by other ways in actual application, which is not limited in the present application.

[0036] The patch 12 can be marked as Patch. The patch 12 is electrically connected to the reference ground 11. In some embodiments, the patch 12 can be quadrilateral, such as square, rectangular, and the like. 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 position of 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 connecting piece 13. The metal connecting piece 13 can be a metalized via, a conductive column, a metal needle, a metal spring, and the like. The first side 121 can be connected to the reference ground 11 through the metal connecting piece 13 to realize the 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 traditional one-mode patch, the half-mode patch has better performance, smaller size, can save nearly half of the space, and is more flexible in design.

[0040] The patch 12 is provided with a feeding point 126. The feeding point 126 is close to the corner 125. In actual application, the feeding point 126 can be arranged close to the edge of the corner 125. The feeding point 126 is used to feed an excitation signal, the patch 12 can transmit the excitation signal and excite corresponding resonances, thereby radiating wireless signals to the outside world. The excitation signal can 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-wave resonance, for example, a half-wavelength TM 1 / 2 1 mode resonance. The third resonance includes a loop resonance and a three-quarter-wavelength resonance, for example, a 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 can both be WIFI resonances, and the second resonance can be a resonance for 5G communication. The frequency range of the first resonance covers the 2.4 GHz frequency band of WIFI, and the frequency range is 2.4 GHz-2.5 GHz. The frequency range of the second resonance covers the N79 frequency band of 5G communication, and the frequency range is 4.4 GHz-5 GHz. The frequency range of the third resonance covers the 5 GHz frequency band of WIFI, and the frequency range is 5.15 GHz-5.85 GHz. Therefore, the three-mode patch antenna 10 can realize coverage of dual-frequency WIFI and the N79 frequency band of 5G.

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

[0044] Reference Figures 4 to 6 , Figure 4 FIG. 1 is a schematic diagram of the current distribution of the first resonance of the three-mode patch antenna 10 according to the embodiment of the present application, Figure 5 FIG. 2 is a schematic diagram of the electric field distribution of the first resonance of the three-mode patch antenna 10 according to the embodiment of the present application, Figure 6 FIG. 3 is a schematic diagram of the magnetic current distribution of the first resonance of the three-mode patch antenna 10 according to the embodiment of the present application.

[0045] The current direction of the first resonance is from the third side 123 towards the first side 121. The electric field distribution of the first resonance is gradually enhanced from the first side 121 towards 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] Reference is made to Figures 7 to 9 , Figure 7 FIG. 2 is a schematic diagram of the current distribution of the second resonance of the three-mode patch antenna 10 of the embodiments of the present application, Figure 8 FIG. 3 is a schematic diagram of the electric field distribution of the second resonance of the three-mode patch antenna 10 of the embodiments of the present application, Figure 9 FIG. 4 is a schematic diagram of the magnetic current distribution of the second resonance of the three-mode patch antenna 10 of the embodiments of the present application.

[0047] The current direction of the second resonance is from the fourth side 124 towards the second side 122. The electric field distribution of the second resonance is gradually enhanced from the first side 121 towards the third side 123, and presents opposite and mutually facing electric field distributions at the two sides of the patch 12. The second resonance forms a quarter wavelength magnetic current at the second side 122 and the fourth side 124, and a half wavelength magnetic current at the first side 121 and the third side 123, which have a magnetic current zero point. The second resonance can be a half wavelength TM 1 / 2 1 mode resonance.

[0048] Reference is made to Figures 10 to 12 , Figure 10 FIG. 5 is a schematic diagram of the current distribution of the third resonance of the three-mode patch antenna 10 of the embodiments of the present application, Figure 11 FIG. 6 is a schematic diagram of the electric field distribution of the third resonance of the three-mode patch antenna 10 of the embodiments of the present application, Figure 12 FIG. 7 is a schematic diagram of the magnetic current distribution of the third resonance of the three-mode patch antenna 10 of the embodiments of the present application.

[0049] The current of the third resonance includes a loop current from the first side 121 towards the third side 123 and a current from the fourth side 124 towards the second side 122. The loop current from the first side 121 towards the third side 123 forms a loop resonance, and the current from the fourth side 124 towards the second side 122 forms a three-quarter wavelength resonance. The electric field distribution of the third resonance is gradually enhanced from the first side 121 towards the third side 123, and presents opposite and mutually facing electric field distributions at the two sides of the patch 12. The third resonance forms a half wavelength magnetic current at the second side 122 and the fourth side 124, and a three-quarter wavelength magnetic current at the first side 121 and the third side 123, which have a magnetic current zero point.

[0050] Reference is made toFigure 13 , Figure 13 is a simulation result diagram of the three-mode patch antenna 10. Wherein, L1 is a 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 a total radiation efficiency curve of the three-mode patch antenna 10. L3 is a theoretical radiation efficiency curve of the three-mode patch antenna 10.

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

[0052] In some embodiments, with reference to Figure 14 , Figure 14 is a second structure diagram of the patch 12 of the three-mode patch antenna shown in Figure 1

[0053] Wherein, the gap can be arranged at at least one of the third side edge 123 and the fourth side edge 124. For example, as shown in Figure 14 , the third side edge 123 is provided with a first gap 127, and the direction of the first gap 127 is towards the first side edge 121; the fourth side edge 124 is provided with a second gap 128, and the direction of the second gap 128 is towards the second side edge 122. The first gap 127 and the second gap 128 both penetrate the patch 12 in the thickness direction of the patch 12.

[0054] It can be understood that in other embodiments, the first gap 127 can be arranged only at the third side edge 123, and the second gap 128 can not be arranged at the fourth side edge 124; or the second gap 128 can be arranged only at the fourth side edge 124, and the first gap 127 can not be arranged at the third side edge 123.

[0055] In actual application, arranging the first gap 127 at the third side edge 123 can increase the electrical length of the third side edge 123, thereby increasing the electrical length of the second resonance, and thus adjusting the frequency of the second resonance. Arranging the second gap 128 at the fourth side edge 124 can increase the electrical length of the fourth side edge 124, thereby increasing the electrical length of the first resonance, and thus adjusting the frequency of the first resonance. The first gap 127 and the second gap 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] With reference to Figure 15 , Figure 15 ​Fig. 1 is a schematic diagram of S parameters of a three-mode patch antenna 10 according to an embodiment of the present application. In Fig. 1, L1, point 1, point 2, point 3, and point 4 have the same meanings as those in Fig. 1, and are not described herein again. L4 is a schematic diagram of S parameters after the first slot 127 and the second slot 128 are opened. Point 5 is a 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 a frequency of the third resonance after the first slot 127 and the second slot 128 are opened, for example, 5.7392 GHz. Figure 13

[0057] It can be known from a comparison between point 1 and point 5 that, after the first slot 127 and the second slot 128 are opened, the frequency of the first resonance is obviously shifted, and the shift amount is about 27.2 MHz. It can be known from a comparison between point 2 and point 4 that, after the first slot 127 and the second slot 128 are opened, the frequency of the second resonance is obviously shifted, and the shift amount is about 150.8 MHz. It can be known from a comparison between point 3 and point 6 that, after the first slot 127 and the second slot 128 are opened, the frequency of the third resonance changes little, and the shift amount is about 6.7 MHz, and thus the first slot 127 and the second slot 128 have little effect on the frequency of the third resonance.

[0058] In some embodiments, reference is made to Figure 16 Figure 16 Fig. 2 is a schematic diagram of a 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 14 and a matching module M. The feed 14 and the matching module M can be disposed on a circuit board, for example, can be disposed on a mainboard of an electronic device, or can be disposed on a small independent board.

[0060] The feed 14 is configured to provide the above-mentioned excitation signals, for example, the 4G excitation signal, the 5G excitation signal, the WIFI excitation signal, the Bluetooth excitation signal, and the like. The matching module M is connected between the feed point 126 and the feed 14. The matching module M is configured to perform impedance matching on the patch 12, so as to switch the frequency band of the three-mode patch antenna 10 to radiate wireless signals.

[0061] In some embodiments, reference is made to Figure 17 and Figure 18 Figure 17 Fig. 3 is a schematic diagram of a structure of the matching module of the three-mode patch antenna shown in Fig. 1, Figure 16 Fig. 4 is a schematic diagram of application of each matching path of the matching module shown in Fig. 3. Figure 18 Figure 17 Fig. 5 is a schematic diagram of application of each matching path of the matching module shown in Fig. 3.

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

[0063] The switching switch K is a single-pole multi-throw switch, for example, a switch formed by a semiconductor device such as a transistor or a switch tube, which has the function of a single-pole multi-throw switch. One end of the switching switch K is connected between the feeding point 126 and the feed source 14, and the other end is used to select one of the plurality of matching paths M1 to be connected, so as to switch the frequency band of the wireless signal radiated by the three-mode patch antenna 10.

[0064] In actual application, the matching path M1 can have various implementation forms, for example, it can only include inductors, or only include capacitors, or include both inductors and capacitors. When the matching path M1 includes both inductors and capacitors, the specific implementation form can be any one of A to H shown in the following table. Figure 18

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

[0066] It should be noted that, Figure 18 A to H shown in the table are only feasible examples, and in actual application, the matching path M1 can also have other circuit structures, which are not listed here.

[0067] The embodiments of the present application also provide an electronic device. The electronic device can be a smart phone, a foldable phone, a tablet computer, etc., and can also be a game device, an AR (Augmented Reality) device, a car, a notebook computer, a desktop computing device, etc.

[0068] Reference Figure 19 , Figure 19 is a structural schematic diagram of an electronic device 100 provided by the embodiments of the present application. The electronic device 100 includes the three-mode patch antenna 10 of any one of the above embodiments and a housing 20. The three-mode patch antenna 10 is arranged on the housing 20. ​

[0069] It can be understood that, although Figure 19 The electronic device 100 can further include functional components such as a mainboard, a battery, a display screen, a camera module, and the like, which are not shown in the drawings.

[0070] In the description of the present application, it should be understood that terms such as "first", "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 technical features indicated.

[0071] It should be pointed out that the "electrical connection" in the embodiments of the present application can be direct connection between two electrical elements to achieve electrical connection, or indirect connection to achieve electrical connection.

[0072] The three-mode patch antenna and the electronic device provided by the embodiments of the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description of the present application should not be understood as a limitation.

Claims

1. A triple-mode patch antenna, characterized by, Comprising: a reference ground; a patch, the patch being a half-mode patch, the patch comprising a first side edge and a corner opposite to the first side edge, the first side edge being electrically connected with the reference ground, the patch being provided with a feed point, the feed point being close to the corner, the feed point being used for feeding an excitation signal; and a feed source, the feed source being electrically connected with the feed point, the feed source being used for providing the excitation signal; wherein the patch generates a first resonance, a second resonance and a third resonance when transmitting the excitation signal, the first resonance being a quarter wavelength resonance, the second resonance being a half wavelength resonance, the third resonance comprising a loop resonance and a three-quarter wavelength resonance.

2. The three-mode patch antenna according to claim 1, wherein: the patch further comprises a second side edge, a third side edge and a fourth side edge, the first side edge, the second side edge, the third side edge and the fourth side edge are connected in sequence; the second side edge and the fourth side edge are long edges, and the first side edge and the third side edge are short edges; a connecting position of the second side edge and the third side edge forms the corner.

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

4. The three-mode patch antenna according to claim 2, wherein: a current direction of the second resonance is from the fourth side edge to the second side edge; the second resonance forms a quarter wavelength magnetic current on the second side edge and the fourth side edge, and forms a half wavelength magnetic current on the first side edge and the third side edge, the first side edge and the third side edge having a magnetic current zero point.

5. The three-mode patch antenna according to claim 2, wherein: a current of the third resonance comprises a loop current from the first side edge to the third side edge and a current from the fourth side edge to the second side edge; the third resonance forms a half wavelength magnetic current on the second side edge and the fourth side edge, and forms a three-quarter wavelength magnetic current on the first side edge and the third side edge, the first side edge and the third side edge having a magnetic current zero point.

6. The three-mode patch antenna according to any one of claims 2 to 5, wherein: the third side edge is provided with a first slot, the first slot being directed to the first side edge; and / or the fourth side edge is provided with a second slot, the second slot being directed to the second side edge.

7. The tri-band patch antenna according to any one of claims 1 to 5, wherein, a frequency range of the first resonance covers a 2.4 GHz frequency band of WIFI, a frequency range of the second resonance covers an N79 frequency band of 5G communication, and a frequency range of the third resonance covers a 5 GHz frequency band of WIFI.

8. The tri-band patch antenna according to claim 7, wherein, the frequency range of the first resonance further covers 2400 MHz to 3800 MHz.

9. The tri-band patch antenna according to any one of claims 1 to 5, wherein, Further comprising: a matching module, the matching module being connected between the feed point and the feed source, the matching module being used for impedance matching of the patch.

10. The tri-band patch antenna of claim 9, wherein, the matching module comprises: a plurality of matching paths, each of which has different impedance, and each of which is grounded; a switching switch, one end of which is connected between the feeding point and the feed source, and the other end of which is used to select one of the plurality of matching paths to be connected.

11. An electronic device, comprising: A three-mode patch antenna comprising any one of claims 1 to 10.

Images