Antenna module and electronic equipment

Abstract

The invention provides an antenna module and electronic equipment. The antenna module comprises a first antenna, a second antenna and a third antenna. The first antenna works in a first frequency band, the second antenna works in a second frequency band, and the third antenna works in a third frequency band; the first antenna and the second antenna share a first radiation branch knot; the first antenna comprises a first tuning circuit, and the resonant frequency of the first tuning circuit is located within the first frequency band and located outside the second frequency band; the second antenna comprises a second tuning circuit, and the resonant frequency of the second tuning circuit is located within the second frequency band and outside the first frequency band. According to the embodiment, the first antenna and the second antenna share the first radiation branch knot, and the antenna signals of the opposite side are mutually filtered, so that the first radiation branch knot cannot radiate the antenna signals of the third frequency band, and the isolation degree of the second antenna and the third antenna is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular, to an antenna module and an electronic device. BACKGROUND

[0002] With the rapid development of communication technology, electronic devices need to integrate more antennas to support more frequency bands and achieve faster data transmission. This requirement puts higher requirements on antenna design.

[0003] Existing electronic devices usually adopt a metal frame design, and the metal frame itself can be used as a radiation branch of an antenna. However, when multiple antennas use the frame as a radiation branch, coupling problems between the antennas will occur, affecting the performance of the antennas. SUMMARY

[0004] The present disclosure provides an antenna module and an electronic device to solve the above technical problems.

[0005] According to a first aspect of the present disclosure, an antenna module is provided, the antenna module comprising a first antenna, a second antenna and a third antenna; the first antenna operates in a first frequency band, the second antenna operates in a second frequency band, and the third antenna operates in a third frequency band; the first antenna and the second antenna share a first radiation branch; and the first antenna comprises a first tuning circuit, the resonant frequency of the first tuning circuit being within the first frequency band and outside the second frequency band; the second antenna comprises a second tuning circuit, the resonant frequency of the second tuning circuit being within the second frequency band and outside the first frequency band.

[0006] Optionally, the first antenna comprises a first feed point, and the second antenna comprises a second feed point; the first antenna and the second antenna share a first grounding point.

[0007] The first grounding point is arranged at a first position of the first radiation branch, and the first position is located at an end of the first radiation branch away from the third antenna.

[0008] The second feed point is arranged at a second position of the first radiation branch, and the second position is located at an end of the first radiation branch close to the third antenna.

[0009] The first feed point is arranged at a third position of the first radiation branch, and the third position is located between the first position and the second position.

[0010] Optionally, the first frequency band is L1 and 2.4G frequency bands, the second frequency band is N77 frequency band, the distance between the second position and the third position is in the range of [6, 9] mm; the distance between the third position and the common ground is in the range of [16, 20] mm.

[0011] Optionally, the first frequency band is GPS L5 frequency band, and the second frequency band is MHB frequency band; the distance between the second position and the gap is in the range of [8, 12] mm; the second radiation branch of the third antenna and the first radiation branch are provided with the gap; the distance between the second position and the third position is in the range of [12, 16] mm; the distance between the first position and the third position is in the range of [6, 12] mm.

[0012] Optionally, the third antenna includes a second ground point, a third feed point and a second radiation branch; the second radiation branch and the first radiation branch are provided with a gap; the third feed point is arranged at a fourth position of the second radiation branch; the second ground point is located at one end of the second radiation branch away from the gap.

[0013] Optionally, the distance between the fourth position and the gap is in the range of [0.5, 2] mm; the distance between the fourth position and the common ground is in the range of [3, 5] mm.

[0014] Optionally, the third frequency band is N77 frequency band, the distance between the fourth position and the gap is in the range of [0.5, 2] mm; the distance between the fourth position and the common ground is in the range of [3, 5] mm.

[0015] Optionally, the first tuning circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;

[0016] The first end of the first inductor is electrically connected with the first signal source of the first antenna, the first end of the second inductor and the first end of the first capacitor respectively; the second end of the first inductor is grounded;

[0017] The first end of the second capacitor is electrically connected with the second end of the second inductor and the second end of the first capacitor respectively; the second end of the second capacitor is electrically connected with the first end of the third capacitor and the first end of the fourth capacitor respectively;

[0018] The second end of the third capacitor is grounded;

[0019] The second end of the fourth capacitor is electrically connected with the first feed point.

[0020] Optionally, third inductor, fourth inductor, fifth capacitor and sixth capacitor;

[0021] The second end of the sixth capacitor is electrically connected with the second feeding point of the second antenna; the first end of the sixth capacitor is electrically connected with the second end of the fourth inductor, the second end of the fifth capacitor and the second end of the third inductor respectively; the first end of the fourth inductor is grounded; the first end of the fifth capacitor and the first end of the third inductor are electrically connected with the second feeding point of the second antenna respectively.

[0022] Optionally, the third antenna comprises a third tuning circuit, the third tuning circuit comprising a fifth inductor, a sixth inductor, a seventh capacitor and an eighth capacitor;

[0023] The first end of the fifth inductor is electrically connected with a third signal source, and the second end of the fifth inductor is electrically connected with a third feeding point of the third antenna;

[0024] The first end of the sixth inductor is electrically connected with the third signal source, and the second end of the sixth inductor is grounded;

[0025] The first end of the seventh capacitor is electrically connected with the third signal source, and the second end of the seventh capacitor is electrically connected with the third feeding point of the third antenna;

[0026] The first end of the eighth capacitor is electrically connected with the third signal source, and the second end of the eighth capacitor is grounded.

[0027] Optionally, the first tuning circuit comprises a seventh inductor, a ninth capacitor, a tenth capacitor and an eleventh capacitor;

[0028] The first end of the ninth capacitor is electrically connected with the first feeding point of the first antenna and the second end of the tenth capacitor respectively, and the second end of the ninth capacitor is electrically connected with the first end of the seventh inductor; the second end of the seventh inductor is grounded; the first end of the tenth capacitor is electrically connected with the first signal source of the first antenna and the first end of the eleventh capacitor respectively; and the second end of the eleventh capacitor is grounded.

[0029] Optionally, the second tuning circuit comprises an eighth inductor, a ninth inductor, a tenth inductor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor and a fifteenth capacitor;

[0030] A first end of the twelfth capacitor is grounded, and a second end of the twelfth capacitor is electrically connected with the second signal source of the second antenna, a second end of the eighth inductor, and a second end of the thirteenth capacitor respectively; a second end of the fourteenth capacitor is electrically connected with a first end of the thirteenth capacitor and a first end of the eighth inductor respectively; a first end of the fourteenth capacitor is electrically connected with a second end of the ninth inductor, a second end of the fifteenth capacitor, and a second end of the tenth inductor respectively; a first end of the ninth inductor is grounded; and a first end of the tenth inductor and a first end of the fifteenth capacitor are electrically connected with the second feeding point of the second antenna respectively.

[0031] Optionally, the third tuning circuit includes an eleventh inductor, a twelfth inductor, and a sixteenth capacitor.

[0032] A second end of the eleventh inductor is electrically connected with the third signal source of the third antenna, and a first end of the eleventh inductor is electrically connected with a second end of the sixteenth capacitor; a first end of the twelfth inductor is electrically connected with a first end of the sixteenth capacitor and a third feeding point of the third antenna respectively; and a second end of the twelfth inductor is grounded.

[0033] According to a second aspect of the present disclosure, an electronic device is provided, which includes a first signal source, a second signal source, a third signal source, a common ground, and an antenna module as described in any one of the first aspect; the antenna module includes a first antenna, a second antenna, and a third antenna; the first signal source is electrically connected with a first feeding point of the first antenna, the second signal source is electrically connected with a second feeding point of the second antenna, and the third signal source is electrically connected with a third feeding point of the third antenna; a first grounding point common to the first antenna and the second antenna is electrically connected with the common ground; and a second grounding point of the third antenna is electrically connected with the common ground.

[0034] Optionally, the electronic device further includes a processor, which is electrically connected with the first signal source, the second signal source, and the third signal source respectively.

[0035] The processor is configured to control at least one of the first signal source, the second signal source, and the third signal source to be electrically connected with a matched antenna.

[0036] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0037] The antenna module provided by the embodiment comprises a first antenna, a second antenna and a third antenna; the first antenna works in a first frequency band, the second antenna works in a second frequency band, and the third antenna works in a third frequency band; the first antenna and the second antenna share a first radiation branch; and the first antenna comprises a first tuning circuit, the resonant frequency of the first tuning circuit is located in the first frequency band and is located out of the second frequency band; the second antenna comprises a second tuning circuit, the resonant frequency of the second tuning circuit is located in the second frequency band and is located out of the first frequency band. In this way, the first antenna and the second antenna in the embodiment share the first radiation branch, and filter out each other's antenna signals, so that the first radiation branch cannot radiate the antenna signals of the third frequency band, and the isolation degree of the second antenna and the third antenna is improved.

[0038] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A block diagram of an electronic device according to an embodiment of the present disclosure.

[0040] Figure 2 A structural schematic diagram of an antenna module according to an embodiment of the present disclosure.

[0041] Figure 3 A circuit diagram of a first tuning circuit according to an embodiment of the present disclosure.

[0042] Figure 4 A circuit diagram of a second tuning circuit according to an embodiment of the present disclosure.

[0043] Figure 5 A circuit diagram of a third tuning circuit according to an embodiment of the present disclosure.

[0044] Figure 6 A structural schematic diagram of another antenna module according to an embodiment of the present disclosure.

[0045] Figure 7 A circuit diagram of another first tuning circuit according to an embodiment of the present disclosure.

[0046] Figure 8 A circuit diagram of another second tuning circuit according to an embodiment of the present disclosure.

[0047] Figure 9 A circuit diagram of another third tuning circuit according to an embodiment of the present disclosure.

[0048] Figure 10 A S11 parameter simulation schematic diagram of a first antenna and a second antenna according to an embodiment of the present disclosure.

[0049] Figure 11 A simulation diagram of isolation degrees of a first antenna, a second antenna and a third antenna according to an embodiment of the present disclosure.

[0050] Figure 12 A simulation diagram of efficiencies of antennas according to an embodiment of the present disclosure.

[0051] Figure 13 A block diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent the same or similar elements. The following exemplary embodiments described in the detailed description are not meant to be exhaustive or to be limiting in scope. Rather, they are intended to be illustrative of devices consistent with the present disclosure, as detailed in the appended claims.

[0053] Embodiments of the present disclosure provide an antenna module and an electronic device. The inventive concept of the antenna module is to increase a first antenna on the basis of a second antenna and a third antenna to improve isolation degrees of the second antenna and the third antenna; specifically, the first antenna and the second antenna share a first radiating branch, and the first antenna and the second antenna filter out each other's antenna signals without processing antenna signals of the third antenna, at which time the antenna signals of the third antenna received by the first antenna and the second antenna cancel each other out, so that the first radiating branch cannot radiate antenna signals of a third frequency band, achieving the effect of improving the isolation degrees of the second antenna and the third antenna.

[0054] In an embodiment, referring to Figure 1 , the electronic device includes an antenna module 10 and a mainboard 20; the mainboard 20 is provided with signal sources S1-S3, which provide driving signals for the antenna module 10.

[0055] In an embodiment, continuing to refer to Figure 1 , the antenna module 10 includes a first antenna 11, a second antenna 12 and a third antenna 13. The first antenna 11 operates in a first frequency band, the second antenna 12 operates in a second frequency band, and the third antenna 13 operates in a third frequency band; the first antenna 11 and the second antenna 12 share a first radiating branch B1; and the first antenna 11 includes a first tuning circuit 14, a resonant frequency of the first tuning circuit 14 being within the first frequency band and outside the second frequency band; the second antenna 12 includes a second tuning circuit 15, a resonant frequency of the second tuning circuit 15 being within the second frequency band and outside the first frequency band.

[0056] It should be noted that the resonant frequency of the first tuning circuit 14 is within the first frequency band and outside the second frequency band, which can be understood that the first tuning circuit 14 can filter out the antenna signal of the second frequency band; the resonant frequency of the second tuning circuit 15 is within the second frequency band and outside the first frequency band, which can be understood that the second tuning circuit 15 can filter out the antenna signal of the first frequency band. In other words, the first antenna 11 and the second antenna 12 can filter out the antenna signal of the other, so as to ensure that the two can work normally when sharing the first radiating branch.

[0057] It should be noted that the first tuning circuit 14 and the second tuning circuit 15 do not limit the third frequency band, and both allow the antenna signal of the third frequency band to pass. In this way, the antenna signals of the third frequency band received by the first antenna 11 and the second antenna 12 can cancel each other out, so that the first radiating branch cannot radiate the antenna signal of the third frequency band, and thus cannot affect the normal work of the third antenna 13.

[0058] In an embodiment, continuing to refer to Figure 1 , the first antenna 11 includes a first feeding point FB1, and the second antenna 12 includes a second feeding point FB2; the first antenna 11 and the second antenna 12 share a first grounding point GND1;

[0059] The first grounding point GND1 is arranged at a first position of the first radiating branch B1, and the first position is located at an end of the first radiating branch B1 away from the third antenna 13;

[0060] The second feeding point FB2 is arranged at a second position of the first radiating branch B1, and the second position is located at an end of the first radiating branch B1 close to the third antenna 13;

[0061] The first feeding point FB1 is arranged at a third position of the first radiating branch B1, and the third position is located between the first position and the second position.

[0062] In an embodiment, continuing to refer to Figure 1 , the third antenna 13 includes a second grounding point GND2, a third feeding point FB3, and a second radiating branch B2; a break F is arranged between the second radiating branch B2 and the first radiating branch B1; the third feeding point FB3 is arranged at a fourth position of the second radiating branch B2; the fourth position is located between the break F and the second grounding point GND2; and the second grounding point GND2 is located at an end of the second radiating branch B2 away from the break F.

[0063] It can be known from Figure 1 that the second antenna 12 and the third antenna 13 constitute a head-to-head antenna combination, wherein the head refers to an end of the antenna away from the grounding point, and the two antennas will couple the antenna signals of each other when working at the same time.

[0064] In this embodiment, the first antenna 11, the second antenna 12, and the third antenna 13 can operate in different frequency bands. In one example, the first antenna 11 operates in the L1 band (1602MHz-1615.5MHz) and the 2.4GHz band (2400MHz-2483.5MHz), the second antenna 12 operates in the N77 band (3.3GHz-4.2GHz), and the third antenna 13 operates in the 5GHz band (e.g., FR1 (450MHz-6.0GHz), FR2 (24.25GHz-52.6GHz)). In another example, the first antenna 11 operates in the GPS L5 band (1175.427MHz-1177.473MHz), the second antenna 12 operates in the MHB band (1.5GHz-3.0GHz), and the third antenna 13 operates in the N77 band (3.3GHz-4.2GHz). It is understood that those skilled in the art can select the operating frequency bands of the first antenna 11, the second antenna 12, and the third antenna 13 according to the specific scenario, and the corresponding schemes fall within the protection scope of this disclosure.

[0065] Taking the first antenna 11 operating in the L1 band and 2.4 GHz band, the second antenna 12 operating in the N77 band, and the third antenna 13 operating in the 5 GHz band as an example, see [reference needed]. Figure 2 The relationships between the first, second, and third positions are as follows: the distance 'a' between the second and third positions ranges from [6, 9] mm; the distance 'b+c' between the third position and the first position (i.e., between the third position and the common ground) ranges from [16, 20] mm. The relationships between the fourth position and the second grounding point are as follows: the distance 'd' between the fourth position and the second grounding point ranges from [3, 5] mm; the distance between the fourth position and the fracture F ranges from [0.5, 2] mm.

[0066] In this embodiment, see Figure 3 The first tuning circuit 14 of the first antenna 11 includes a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The first terminal of the first inductor L1 is electrically connected to the first signal source S1 of the first antenna 11, the first terminal of the second inductor L2, and the first terminal of the first capacitor C1, respectively; the second terminal of the first inductor L1 is grounded (GND); the first terminal of the second capacitor C2 is electrically connected to the second terminal of the second inductor L2 and the second terminal of the first capacitor C1, respectively; the second terminal of the second capacitor C2 is electrically connected to the first terminal of the third capacitor C3 and the first terminal of the fourth capacitor C4, respectively; the second terminal of the third capacitor C3 is grounded; and the second terminal of the fourth capacitor C4 is electrically connected to the first feed point FB1. The second inductor L2 and the first capacitor C1 constitute a band-stop filter, which can filter out the 3.6 GHz antenna signal.

[0067] In an example, the inductance value of the first inductor L1 is 1-5nH, the inductance value of the second inductor L2 is 1-5nH, the capacitance value of the first capacitor C1 is 0.1-1pF, the capacitance value of the second capacitor C2 is 1-3pF, the capacitance value of the third capacitor C3 is 0.1-1pF, and the capacitance value of the fourth capacitor C4 is 1-5pF.

[0068] In the embodiment, referring to Figure 4 , the second tuning circuit 15 of the second antenna 12 includes a third inductor L3, a fourth inductor L4, a fifth capacitor C5, and a sixth capacitor C6. The second end of the sixth capacitor C6 is electrically connected with the second feeding point FB2 of the second antenna 12; the first end of the sixth capacitor C6 is electrically connected with the second end of the fourth inductor L4, the second end of the fifth capacitor C5, and the second end of the third inductor L3 respectively; the first end of the fourth inductor L4 is grounded GND; the first end of the fifth capacitor C5 and the first end of the third inductor L3 are electrically connected with the second feeding point FB2 of the second antenna 12 respectively. Among them, the third inductor L3 and the fifth capacitor C5 constitute a 2.4G band-stop filter.

[0069] In an example, the inductance value of the third inductor L3 is 1-5nH, the inductance value of the fourth inductor L4 is 1-5nH, the capacitance value of the fifth capacitor C5 is 1-5pF, and the capacitance value of the sixth capacitor C6 is 0.1-5pF.

[0070] In the embodiment, referring to Figure 5 , the third tuning circuit 16 of the third antenna 13 includes a fifth inductor L5, a sixth inductor L6, a seventh capacitor C7, and an eighth capacitor C8.

[0071] The first end of the fifth inductor L5 is electrically connected with the third signal source S3, and the second end of the fifth inductor L5 is electrically connected with the third feeding point FB3 of the third antenna 13; the first end of the sixth inductor L6 is electrically connected with the third signal source S3, and the second end of the sixth inductor L6 is grounded GND; the first end of the seventh capacitor C7 is electrically connected with the third signal source S3, and the second end of the seventh capacitor C7 is electrically connected with the third feeding point FB3 of the third antenna 13; the first end of the eighth capacitor C8 is electrically connected with the third signal source S3, and the second end of the eighth capacitor C8 is grounded GND.

[0072] In an example, the inductance value of the fifth inductor L5 is 0.1-1nH, the inductance value of the sixth inductor L6 is 0.1-1.5nH, the capacitance value of the seventh capacitor C7 is 1-5pF, and the capacitance value of the eighth capacitor C8 is 1-5pF.

[0073] Taking the first antenna 11 working in the GPS L5 frequency band, the second antenna 12 working in the MHB frequency band, and the third antenna 13 working in the N77 frequency band as an example, referring to Figure 6 , the relationship among the first position, the second position, and the third position is:

[0074] The relationship between the first position, the second position and the third position is that the distance h+i between the first position and the third position ranges from 6mm to 12mm, the distance g between the second position and the third position ranges from 12mm to 16mm, and the distance f between the second position and the fracture F ranges from 8mm to 12mm. The relationship between the fourth position and the second grounding point is that the distance j between the fourth position and the second grounding point ranges from 4mm to 8mm, and the distance between the fourth position and the fracture F ranges from 3mm to 5mm.

[0075] In an embodiment, referring to Figure 7 , the first tuning circuit 14 of the first antenna 11 includes a seventh inductor L7, a ninth capacitor C9, a tenth capacitor C10 and an eleventh capacitor C11.

[0076] The first end of the ninth capacitor C9 is electrically connected with the first feeding point FB1 of the first antenna 11 and the second end of the tenth capacitor C10 respectively, and the second end of the ninth capacitor C9 is electrically connected with the first end of the seventh inductor L7; the second end of the seventh inductor L7 is grounded GND; the first end of the tenth capacitor C10 is electrically connected with the first signal source S1 of the first antenna 11 and the first end of the eleventh capacitor C11 respectively; the second end of the eleventh capacitor C11 is grounded GND. Among them, the seventh inductor L7 and the ninth capacitor C9 constitute the filter circuit of the MHB frequency band.

[0077] In an embodiment, referring to Figure 8 , the second tuning circuit 15 of the second antenna 12 includes an eighth inductor L8, a ninth inductor L9, a tenth inductor L10, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14 and a fifteenth capacitor C15.

[0078] The first end of the twelfth capacitor C12 is grounded GND, and the second end of the twelfth capacitor C12 is electrically connected with the second signal source S2 of the second antenna 12, the second end of the eighth inductor L8 and the second end of the thirteenth capacitor C13 respectively; the second end of the fourteenth capacitor C13 is electrically connected with the first end of the thirteenth capacitor C13 and the first end of the eighth inductor L8 respectively; the first end of the ninth inductor L9 is grounded; the first end of the tenth inductor L10 and the first end of the fifteenth capacitor C15 are electrically connected with the second feeding point FB2 of the second antenna 12 respectively. Among them, the tenth inductor L10 and the fifteenth capacitor C15 constitute the filter circuit of the GPS L5 frequency band.

[0079] In an embodiment, referring to Figure 9The second tuning circuit 15 of the third antenna 13 includes an eleventh inductor L11, a twelfth inductor L12, and a sixteenth capacitor C16.

[0080] The second end of the eleventh inductor L11 is electrically connected with a third signal source S3 of the third antenna 13, and the first end of the eleventh inductor L11 is electrically connected with the second end of the sixteenth capacitor C16; the first end of the twelfth inductor L12 is electrically connected with the first end of the sixteenth capacitor C16 and a third feeding point FB3 of the third antenna 13 respectively; and the second end of the twelfth inductor L12 is grounded GND.

[0081] In combination with the antenna module of the above example, the antenna module is simulated and tested. In order to reduce the length, the antenna module of the example shown in Figures 2 to 5 is simulated, including:

[0082] Referring to Figure 10 , the S11 parameter curve S11,11 of the first antenna 11, the S11 parameter curve S12,12 of the second antenna 12, and the isolation S11,12 of the first antenna 11 and the second antenna 12 are shown, and 10 test points are collected, and the test values of each test point are: 1 (3.3, -2.296060), 2 (3.8, -4.177592), 3 (4.2, -8.506099), 4 (5.15, -16.49978), 5 (1.575, -7.830411), 6 (2.4, -4.521588), 7 (2.5, -8.710173), 8 (5.15, -3.666352), 9 (5.886804, -4.944754), and 10 (5.402774, -3.296724). In combination with the above each test point, since the working frequency band of the third antenna 13 is the WiFi 5G frequency band, which is not within the working frequency band of the first antenna 11 and the second antenna 12 and is not isolated, in addition, the first antenna 11 and the second antenna 12 adopt the scheme of sharing the first radiation branch, and the isolation of the first antenna 11 and the second antenna 12 in the WiFi 5G frequency band, i.e., the third frequency band, is poor, about -3dB shown in the tenth test point.

[0083] Due to the poor isolation of the first antenna 11 and the second antenna 12 in the WiFi 5G frequency band, the radiation performance of the first antenna 11 and the second antenna 12 in the WiFi 5G frequency band is poor, so as not to affect the radiation performance of the third antenna 13, thereby improving the isolation of the second antenna and the third antenna. Referring to Figure 11, the S11 parameter curve S11,11 of the first antenna 11, the S11 parameter curve S12,12 of the second antenna 12, the isolation S11,13 of the first antenna 11 and the third antenna 13, and the isolation S12,13 of the second antenna 12 and the third antenna 13, the influence of the first antenna 11 and the second antenna 12 on the third antenna 13 is low, that is, the lowest test value of the first antenna 11 and the third antenna 13 is-14dB, that is, at test point 9 and test point 10; the lowest test value of the second antenna 12 and the third antenna is-13dB, that is, at test point 7 and test point 8, so as to improve the isolation of the second antenna and the third antenna.

[0084] Due to the reduction of the radiation performance of the first radiation branch of the first antenna 11 and the second antenna 12, the influence on the third antenna 13 is reduced, see Figure 12 , the radiation efficiency of the first antenna 11, the second antenna 12 and the third antenna 13, the total efficiency curve 11-1 and the radiation efficiency curve 11-2 of the first antenna 11, the total efficiency curve 12-1 and the radiation efficiency curve 12-2 of the second antenna 12, the total efficiency curve 13-1 and the radiation efficiency curve 13-2 of the third antenna 13, and 11 test points are collected, and the test values of each test point are: 1(5.15, -11.04059), 2(5.85, -10.0685), 3(5.15, -13.85565), 4(5.85, -11.59254), 5(5.15, -2.593439), 6(5.85, -2.379945), 7(3.3, -5.858213), 8(4.2, -7.691281), 9(3.8, -5.335326), 10(1.577196, -3.452873) and 11(2.488608, -3.363027), in combination with the above test points, it can be known that the first antenna 11 and the second antenna 12 have serious mutual coupling in the WiFi 5G frequency band outside the working frequency band, and the radiation efficiency is rapidly reduced to below-10dB (test points 1, 2, 3 and 4), that is, there is no third frequency band radiation capability, which achieves the effect of not affecting the third antenna 13; and the efficiency of the third antenna 13 near the working frequency band, that is, the WiFi 5G frequency band, is about-2.4dB (test points 5 and 6).

[0085] In combination with the content of the above embodiments, it can be known that one first antenna is added in the embodiments of the present disclosure, and a filtering circuit for filtering the signals of the first antenna and the second antenna is added, so that the isolation between the antennas can be improved without using a complex filtering network or increasing the physical size and ground return of the antennas. Moreover, the scheme of the embodiments can fully utilize the space, improve the stacking utilization rate, compactly arrange the antennas, and has a simple structure and a more optimal cost.

[0086] Figure 13is a block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 1300 can be a smartphone, a computer, a digital broadcasting terminal, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

[0087] The electronic device can include Figures 1 to 12 In addition to the illustrated structure, referring to Figure 13 The electronic device 1300 can include one or more of the following components: a processing component 1302, a memory 1304, a power component 1306, a multimedia component 1308, an audio component 1310, an input / output (I / O) interface 1312, a sensor component 1314, a communication component 1316, and an image acquisition component 1318.

[0088] The processing component 1302 generally controls the overall operation of the electronic device 1300, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1302 can include one or more processors 1320 to execute computer programs. In addition, the processing component 1302 can include one or more modules to facilitate interaction between the processing component 1302 and other components. For example, the processing component 1302 can include a multimedia module to facilitate interaction between the multimedia component 1308 and the processing component 1302. In an example, the processing component can include a processor to execute the antenna control method described above.

[0089] The memory 1304 is configured to store various types of data to support operations of the electronic device 1300. Examples of the data include computer programs for operating any application or method on the electronic device 1300, contact data, phonebook data, messages, pictures, videos, and the like. The memory 1304 can be implemented by any type of volatile or non-volatile memory device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0090] The power component 1306 provides power to various components of the electronic device 1300. The power component 1306 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the electronic device 1300. The power component 1306 can include a power chip, and a controller can communicate with the power chip to control the power chip to turn on or off a first switching device, so as to supply or not supply power from the battery to the circuit board circuit.

[0091] The multimedia component 1308 includes a screen to provide an output interface between the electronic device 1300 and an object. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input information from an object. The touch panel includes one or more touch sensors to sense touch, slide and gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and pressure related to the touching or sliding action.

[0092] The audio component 1310 is configured to output and / or input audio file information. For example, the audio component 1310 includes a microphone (MIC) configured to receive external audio file information when the electronic device 1300 is in a mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio file information can be further stored in the memory 1304 or transmitted via the communication component 1316. In some embodiments, the audio component 1310 also includes a speaker for outputting audio file information.

[0093] The I / O interface 1312 provides an interface between the processing component 1302 and peripheral interface modules, which can be a keypad, a click wheel, a button, and the like.

[0094] The sensor component 1314 includes one or more sensors to provide various state assessments for the electronic device 1300. For example, the sensor component 1314 can detect an open / close state of the electronic device 1300, a relative positioning of components, such as a display screen and a keypad of the electronic device 1300, a change in position of the electronic device 1300 or a component, the presence or absence of contact of an object with the electronic device 1300, an orientation or acceleration / deceleration of the electronic device 1300, and a change in temperature of the electronic device 1300. In this example, the sensor component 1314 can include a magnetic force sensor, a gyroscope, and a magnetic field sensor, and can further include an inertial sensor, an image sensor, and the like, wherein the magnetic field sensor includes at least one of a Hall sensor, a thin-film magnetoresistive sensor, and a magnetic liquid acceleration sensor.

[0095] The communication component 1316 is configured to facilitate wired or wireless communication between the electronic device 1300 and other devices. The electronic device 1300 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 1316 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1316 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technology. In an example, the communication component 1316 includes a plurality of communication modules so as to perform the communication function by using a communication scheme corresponding to each individual communication module. Figures 1 to 9 The antenna module is shown.

[0096] In an exemplary embodiment, the electronic device 1300 can be implemented with one or more application-specific integrated circuits (ASICs), digital information processors (DSPs), digital information processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements.

[0097] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the aspects disclosed herein. The present disclosure is intended to encompass any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure that come within known

[0098] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. An antenna module, characterized by The antenna module comprises a first antenna, a second antenna and a third antenna; the first antenna operates in a first frequency band, the second antenna operates in a second frequency band, and the third antenna operates in a third frequency band; the first antenna and the second antenna share a first radiating branch; and the first antenna comprises a first tuning circuit, the resonant frequency of the first tuning circuit being within the first frequency band and outside the second frequency band; the second antenna comprises a second tuning circuit, the resonant frequency of the second tuning circuit being within the second frequency band and outside the first frequency band.

2. The antenna module of claim 1, wherein, The first antenna comprises a first feed point, and the second antenna comprises a second feed point; the first antenna and the second antenna share a first grounding point; The first grounding point is arranged at a first position of the first radiating branch, and the first position is located at an end of the first radiating branch away from the third antenna; The second feed point is arranged at a second position of the first radiating branch, and the second position is located at an end of the first radiating branch close to the third antenna; The first feed point is arranged at a third position of the first radiating branch, and the third position is located between the first position and the second position.

3. The antenna module of claim 2, wherein, The first frequency band is an L1 frequency band and a 2.4G frequency band, the second frequency band is an N77 frequency band, the distance between the second position and the third position is within a range of [6, 9] mm, and the distance between the third position and the common ground is within a range of [16, 20] mm.

4. The antenna module of claim 2, wherein, The first frequency band is a GPS L5 frequency band, and the second frequency band is an MHB frequency band; the distance between the second position and the break is within a range of [8, 12] mm; the second radiating branch of the third antenna and the first radiating branch are provided with the break; the distance between the second position and the third position is within a range of [12, 16] mm; and the distance between the first position and the third position is within a range of [6, 12] mm.

5. The antenna module of claim 2, wherein, The third antenna comprises a second grounding point, a third feed point and a second radiating branch; the second radiating branch and the first radiating branch are provided with a break; the third feed point is arranged at a fourth position of the second radiating branch; and the second grounding point is located at an end of the second radiating branch away from the break.

6. The antenna module of claim 5, wherein, The distance between the fourth position and the break is within a range of [0.5, 2] mm, and the distance between the fourth position and the common ground is within a range of [3, 5] mm.

7. The antenna module of claim 5, wherein, The third frequency band is an N77 frequency band, the distance between the fourth position and the break is within a range of [0.5, 2] mm, and the distance between the fourth position and the common ground is within a range of [3, 5] mm.

8. The antenna module of claim 3, wherein, The first tuning circuit comprises a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; The first end of the first inductor is electrically connected with the first signal source of the first antenna, the first end of the second inductor and the first end of the first capacitor respectively; the second end of the first inductor is grounded; the first end of the second capacitor is electrically connected with the second end of the second inductor and the second end of the first capacitor respectively; the second end of the second capacitor is electrically connected with the first end of the third capacitor and the first end of the fourth capacitor respectively; the second end of the third capacitor is grounded; and the second end of the fourth capacitor is electrically connected with the first feeding point.

9. The antenna module of claim 3, wherein, The second tuning circuit comprises a third inductor, a fourth inductor, a fifth capacitor and a sixth capacitor; The second end of the sixth capacitor is electrically connected with the second feeding point of the second antenna; the first end of the sixth capacitor is electrically connected with the second end of the fourth inductor, the second end of the fifth capacitor and the second end of the third inductor respectively; the first end of the fourth inductor is grounded; and the first end of the fifth capacitor and the first end of the third inductor are electrically connected with the second feeding point of the second antenna respectively.

10. The antenna module of claim 3, wherein, The third antenna comprises a third tuning circuit, and the third tuning circuit comprises a fifth inductor, a sixth inductor, a seventh capacitor and an eighth capacitor; The first end of the fifth inductor is electrically connected with a third signal source, and the second end of the fifth inductor is electrically connected with a third feeding point of the third antenna; The first end of the sixth inductor is electrically connected with the third signal source, and the second end of the sixth inductor is grounded; The first end of the seventh capacitor is electrically connected with the third signal source, and the second end of the seventh capacitor is electrically connected with the third feeding point of the third antenna; The first end of the eighth capacitor is electrically connected with the third signal source, and the second end of the eighth capacitor is grounded.

11. The antenna module of claim 4, wherein, The first tuning circuit comprises a seventh inductor, a ninth capacitor, a tenth capacitor and an eleventh capacitor; The first end of the ninth capacitor is electrically connected with the first feeding point of the first antenna and the second end of the tenth capacitor respectively, and the second end of the ninth capacitor is electrically connected with the first end of the seventh inductor; the second end of the seventh inductor is grounded; the first end of the tenth capacitor is electrically connected with the first signal source of the first antenna and the first end of the eleventh capacitor respectively; and the second end of the eleventh capacitor is grounded.

12. The antenna module of claim 4, wherein, The second tuning circuit comprises an eighth inductor, a ninth inductor, a tenth inductor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor and a fifteenth capacitor; The first end of the twelfth capacitor is grounded, and the second end of the twelfth capacitor is electrically connected with the second signal source of the second antenna, the second end of the eighth inductor and the second end of the thirteenth capacitor respectively; the second end of the fourteenth capacitor is electrically connected with the first end of the thirteenth capacitor and the first end of the eighth inductor respectively; the first end of the fourteenth capacitor is electrically connected with the second end of the ninth inductor, the second end of the fifteenth capacitor and the second end of the tenth inductor respectively; the first end of the ninth inductor is grounded; and the first end of the tenth inductor and the first end of the fifteenth capacitor are electrically connected with the second feeding point of the second antenna respectively.

13. The antenna module of claim 4, wherein, A third tuning circuit of the third antenna comprises an eleventh inductor, a twelfth inductor and a sixteenth capacitor; A second end of the eleventh inductor is electrically connected with a third signal source of the third antenna, and a first end of the eleventh inductor is electrically connected with a second end of the sixteenth capacitor; a first end of the twelfth inductor is electrically connected with a first end of the sixteenth capacitor and a third feeding point of the third antenna respectively; and a second end of the twelfth inductor is grounded.

14. An electronic device, comprising: The electronic device comprises a first signal source, a second signal source, a third signal source, a common ground and the antenna module as claimed in any one of claims 1 to 13; and the antenna module comprises a first antenna, a second antenna and a third antenna. The first signal source is electrically connected with a first feeding point of the first antenna, the second signal source is electrically connected with a second feeding point of the second antenna, and the third signal source is electrically connected with a third feeding point of the third antenna; a first grounding point common to the first antenna and the second antenna is electrically connected with the common ground; and a second grounding point of the third antenna is electrically connected with the common ground.

15. The electronic device of claim 14, wherein, The electronic device further comprises a processor, which is electrically connected with the first signal source, the second signal source and the third signal source respectively. The processor is configured to control at least one of the first signal source, the second signal source and the third signal source to be electrically connected with a matched antenna.

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