Community antenna and electronic equipment

Abstract

The present application provides a co-body antenna and a mobile terminal including the co-body antenna. The co-body antenna includes a radiator divided into a first sub-radiator and a second sub-radiator by a gap, a first feeding point, and a second feeding point; the radio frequency signal transmitted by the first feeding point generates a plurality of working frequency bands of different antenna modes through the resonance of the first sub-radiator and the parasitic resonance of the second sub-radiator, and the radio frequency signal transmitted by the second feeding point generates a plurality of working frequency bands of different antenna modes through the resonance of the second sub-radiator and the parasitic resonance of the first sub-radiator. The co-body antenna is capable of generating a plurality of different antenna modes through the resonance generated by the first sub-radiator and the second sub-radiator, and the parasitic resonance generated by the mutual influence between the first sub-radiator and the second sub-radiator. Moreover, different antenna modes share a radiator, and only two feeding points are required, so that the antenna co-body is realized and the antenna structure is simplified, thereby reducing the occupied space of the co-body antenna.

Description

Technical Field

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

[0002] With the continuous development of communication technology, more antennas need to be deployed in mobile terminals such as mobile phones. In addition, as the development trend of mobile terminals such as mobile phones is high screen-to-body ratio and multiple cameras, the antenna clearance is greatly reduced, and the antenna layout space is further compressed. Therefore, how to deploy more antennas in a limited clearance space has become a major problem in antenna design. Summary of the invention

[0003] The present application provides a common antenna and electronic equipment, aiming to reduce the space occupied by the antenna so as to arrange more antennas in a limited clearance space.

[0004] In the first aspect, the present application provides a co-body antenna. The co-body antenna comprises a radiator, a first grounding point, a second grounding point, a first feeding point, a second feeding point, a first filtering circuit and a second filtering circuit; the first grounding point and the second grounding point are both grounded, and the first grounding point and the second grounding point are respectively located at two opposite ends of the radiator; a gap is provided on the radiator, and the gap divides the radiator into a first sub-radiator and a second sub-radiator, the first feeding point is located on the first sub-radiator, and the second feeding point is located on the second sub-radiator; one end of the first filtering circuit is connected to the first feeding point, and the other end is grounded; one end of the second filtering circuit is connected to the second feeding point, and the other end is grounded; the radio frequency signal transmitted by the first feeding point generates a plurality of working frequency bands of different antenna modes through the resonance of the first sub-radiator and the parasitic resonance of the second sub-radiator, and the radio frequency signal transmitted by the second feeding point generates a plurality of working frequency bands of different antenna modes through the resonance of the second sub-radiator and the parasitic resonance of the first sub-radiator.

[0005] In the present application, by setting at least two feeding points (including the first feeding point and the second feeding point) on the radiator between the first grounding point and the second grounding point, compared with the antenna structure in which only one feeding point is set on the radiator of two adjacent grounding points (that is, each radiator is provided with a feeding point), the two feeding points in the present application can simultaneously transmit signals, so that multiple antenna modes can be generated on the radiator at the same time, and different antenna modes can share the radiator, thereby reducing the volume occupied by the antenna. Moreover, in the case of covering the same type of antenna modes, the use of feeding points and corresponding RF components can be reduced by sharing the radiator in the present application, thereby further simplifying the structure of the antenna and reducing the volume occupied by the antenna.

[0006] In the present application, the radiator is divided into a first sub-radiator and a second sub-radiator by setting a gap, and the first sub-radiator and the second sub-radiator are fed separately. When the first sub-radiator resonates due to the signal fed into the first feeding point, the second sub-radiator will produce a parasitic resonance under the influence of the first sub-radiator; at the same time, when the second sub-radiator resonates due to the signal fed into the second feeding point, the first sub-radiator will produce a parasitic resonance under the influence of the second sub-radiator. Through the mutual influence between the first radiator and the second radiator, parasitic resonance will be generated on the common antenna, thereby further increasing the working frequency band covered by the antenna, that is, it is possible to further increase the number of antenna modes while avoiding increasing the space occupied by the antenna.

[0007] Furthermore, the present application adjusts the ground feeding position of the RF signal through the first filter circuit and the second filter circuit by connecting one end of the first filter circuit to the first feeding point and the other end to the ground; connecting one end of the second filter circuit to the second feeding point and the other end to the ground. Due to the different feeding positions, different antenna modes are generated, that is, through the first filter circuit and the second filter circuit, the common antenna can obtain more different antenna modes, thereby ensuring the required antenna mode while avoiding increasing the antenna layout space.

[0008] In one embodiment of the present application, the first filter circuit is a high-impedance low-pass filter circuit, which is a passband in the GPS frequency band and a stopband in the frequency band greater than or equal to 2.4G WIFI, that is, the first filter circuit can allow the RF signal of the GPS frequency band to pass, and does not allow the RF signal greater than or equal to the 2.4G WIFI frequency band to pass. The second filter circuit is a high-pass low-impedance filter circuit, which is a stopband in the GPS frequency band and a passband in the frequency band greater than or equal to 2.4G WIFI, that is, the first filter circuit can allow the RF signal greater than or equal to the 2.4G WIFI frequency band to pass, and does not allow the RF signal of the GPS frequency band to pass. The first filter circuit is used to allow the RF signal of a certain frequency band to be grounded through the first filter circuit, and the second filter circuit is used to allow the RF signal of a certain frequency band to be grounded through the second filter circuit. By changing the position of the grounding point, the ground feed positions of different RF signals are different, thereby obtaining different antenna modes.

[0009] In one embodiment of the present application, the first filter circuit and the second filter circuit both include a first capacitor and a first inductor connected in parallel.

[0010] In another embodiment of the present application, the first filter circuit or the second filter circuit further includes a second inductor, and the second inductor is connected in series with the first capacitor.

[0011] In another embodiment of the present application, the first filter circuit or the second filter circuit further includes a second capacitor, and the second capacitor is connected in series with the first capacitor and the first inductor which are arranged in parallel.

[0012] In some embodiments of the present application, the operating frequency band generated by the resonance of the first sub-radiator and the parasitic resonance of the second sub-radiator covers the operating frequency band of the WIFI antenna and the Sub 6G antenna, that is, the radiator can be used as the radiator of the WIFI antenna and the Sub 6G antenna at the same time, thereby realizing the common body of the WIFI antenna and the Sub 6G antenna. Further, in some embodiments, the operating frequency band generated by the resonance of the second sub-radiator and the parasitic resonance of the first sub-radiator covers the operating frequency band of the GPS L1 antenna and the GPS L5 antenna, that is, the radiator can be used as the radiator of the GPS L1 antenna and the GPSL5 antenna at the same time, thereby realizing the common body of the GPS L1 antenna and the GPS L5 antenna. It can be understood that in some embodiments, the working frequency band generated by the resonance of the first sub-radiator and the parasitic resonance of the second sub-radiator covers the working frequency band of the WIFI antenna and the Sub 6G antenna. At the same time, the working frequency band generated by the resonance of the second sub-radiator and the parasitic resonance of the first sub-radiator covers the working frequency band of the GPS L1 antenna and the GPS L5 antenna, so that the WIFI antenna, the Sub 6G antenna, the GPS L1 antenna, and the GPS L5 antenna can be realized as a co-body, so that the co-body antenna covers the working frequency bands of multiple different antenna modes while occupying a small space. At the same time, the co-body antenna can achieve coverage of multiple antenna modes through two feeding points (the first feeding point and the second feeding point), which can reduce the number of feeding points compared to the antenna in the prior art, thereby reducing the number of springs or connecting lines connecting the feeding point to the RF front end and the number of resonant elements for adjusting the antenna mode, thereby simplifying the structure of the antenna and further reducing the space occupied by the antenna. In some embodiments of the present application, the working frequency band generated by the resonance of the first sub-radiator includes the first working frequency band, the second working frequency band and the third working frequency band, and the working frequency band generated by the parasitic resonance of the second sub-radiator includes the fourth working frequency band and the fifth working frequency band; the first working frequency band covers the working frequency band of the 2.4G WIFI antenna, the second working frequency band and the fourth working frequency band cover the working frequency band of the Sub6G antenna, and the third working frequency band and the fifth working frequency band cover the working frequency band of the 5G WIFI antenna. In these embodiments, the working frequency band generated by the resonance of the first sub-radiator and the parasitic resonance generated by the second sub-radiator can cover the working frequency bands of the Sub 6G antenna and the 2.4G WIFI and 5G WIFI antennas, that is, the radiator can simultaneously realize the coexistence of the Sub 6G antenna and the WIFI antenna, saving the layout space of the antenna.

[0013] The Sub 6G antenna refers to a frequency band of an antenna mode whose working frequency band is lower than 6 GHz. In some embodiments of the present application, the Sub 6G frequency band mainly includes 5G frequency bands such as N77, N78, and N79 to meet the needs of existing 5G communications.

[0014] Specifically, in some embodiments, the first operating frequency band is the operating frequency band of the IFA quarter antenna mode generated by the resonance of the first sub-radiator, the second operating frequency band is the operating frequency band of the half wavelength mode of the loop antenna formed from the first feeding point to the first grounding point, and the third operating frequency band is the operating frequency band of the IFA three-quarter antenna mode generated by the resonance of the first sub-radiator; the fourth operating frequency band is the half wavelength mode of the loop parasitic antenna generated by the parasitic resonance of the second sub-radiator, and the fifth operating frequency band is the three-half wavelength mode of the loop parasitic antenna generated by the parasitic resonance of the second sub-radiator.

[0015] In some embodiments of the present application, the working frequency band generated by the resonance of the second sub-radiator includes the sixth working frequency band, and the working frequency band generated by the parasitic resonance of the first sub-radiator includes the seventh working frequency band. The sixth working frequency band covers the working frequency band of the GPS L5 antenna, and the seventh working frequency band covers the working frequency band of the GPS L1 antenna. Therefore, the working frequency band generated by the radiator can simultaneously cover the working frequency band of the GPS L5 antenna and the working frequency band of the GPS L1 antenna, thereby realizing the coexistence of the GPS L1 antenna and the GPS L5 antenna and saving the layout space of the antenna.

[0016] Specifically, in some embodiments, the sixth operating frequency band is the operating frequency band of the composite left-handed antenna mode generated by the resonance of the second sub-radiator, and the seventh operating frequency band is the operating frequency band of the band antenna mode generated by the parasitic resonance of the first sub-radiator. The sixth operating frequency band is generated by the composite left-handed antenna mode, and the length of the radiator of the composite left-handed antenna mode is 1 / 8λ. Compared with other antenna modes, the length of the radiator is smaller, thereby further reducing the layout space of the antenna.

[0017] Specifically, in some embodiments, a tuning element is connected between the first feeding point and / or the second feeding point and the RF front end, and the tuning element is used to adjust the type of each antenna mode of the common antenna and its operating frequency band. The type of the tuning element connected between the first feeding point and / or the second feeding point and the RF front end is adjusted according to actual needs, so that the antenna mode generated by the common antenna can meet the needs of actual use. In the present application, the tuning element can be a capacitor element or an inductor element, and the capacitor element and the inductor element can be connected in parallel or in series between the first feeding point and / or the second feeding point and the RF front end.

[0018] In one embodiment of the present application, the tuning element includes a capacitor element connected between the second feeding point and the RF front end. By setting the capacitor element between the second feeding point and the RF front end, a composite left-handed antenna is formed from the RF front end to the second grounding point, thereby obtaining a certain working frequency band while minimizing the size of the radiator and saving antenna layout space.

[0019] In the present application, the width of the gap is greater than one thirty-second wavelength of the highest resonant frequency and less than one sixteenth wavelength of the highest resonant frequency; the highest resonant frequency is the highest operating frequency among the operating frequencies of the multiple different antenna modes of the common antenna.

[0020] In the present application, the width of the gap needs to be controlled within a certain range to avoid the width of the gap being too wide or too narrow, so as to ensure that the first radiator and the second radiator can influence each other and generate parasitic resonance in a certain working frequency band.

[0021] In some embodiments of the present application, the distance from the first feed point to the slot is one sixteenth of the wavelength of the working frequency of the antenna mode formed between the first feed point and the slot, and the distance from the second feed point to the slot is one eighth of the wavelength of the working frequency of the antenna mode formed between the second feed point and the slot; the distance from the first ground point to the slot is one quarter of the wavelength of the working frequency of the antenna mode formed between the first ground point and the slot; the distance from the second ground point to the slot is one quarter of the wavelength of the working frequency of the antenna mode formed between the second ground point and the slot. In the present application, by designing the distance from the first feed point to the slot, the distance from the second feed point to the slot, the distance from the first ground point to the slot, and the distance from the first ground point to the slot to be within a certain range, the common antenna can generate the required working frequency band to meet the needs of actual use.

[0022] In a second aspect, the present application also provides an electronic device. The electronic device includes a middle frame, a main board, and the co-body antenna, the middle frame is grounded, and the first grounding point and the second grounding point of the co-body antenna are both connected to the middle frame to achieve grounding of the first grounding point and the second grounding point. The RF front end of the co-body antenna is arranged on the main board, and the main board is arranged on the middle frame. Since the co-body antenna occupies a small space, the required clearance is also small, so that the layout in the electronic device can be made more compact.

[0023] In some embodiments of the present application, the electronic device includes a metal frame surrounding the mainboard and the middle frame, part of the metal frame is the radiator of the shared antenna, and the metal frame as the radiator is spaced from the mainboard to form a gap, and the gap is the clearance area of ​​the shared antenna. By using the metal frame as the radiator of the shared antenna, the space occupied by the shared antenna can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the structural features and functions of the present application, it is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of a shared antenna according to an embodiment of the present application;

[0026] Figure 2 A schematic structural diagram of a first embodiment of a filter circuit in a common antenna according to an embodiment of the present application;

[0027] Figure 3 A schematic structural diagram of a second embodiment of a filter circuit in a common antenna according to an embodiment of the present application;

[0028] Figure 4 It is a structural schematic diagram of a third embodiment of the filtering circuit in the common antenna according to the embodiment of the present application;

[0029] Figure 5 It is a structural schematic diagram of a fourth embodiment of the filtering circuit in the common antenna according to the embodiment of the present application;

[0030] Figure 6 A schematic diagram of the structure of a shared antenna according to another embodiment of the present application;

[0031] Figure 7 for Figure 6 S parameter simulation diagram of the common antenna of the embodiment;

[0032] Figure 8 for Figure 6 A schematic diagram of current distribution of an IFA quarter antenna mode generated by resonance of the first sub-radiator of the common body antenna of an embodiment;

[0033] Fig. 9 for Figure 6 A schematic diagram of current distribution in a half-wavelength mode of a loop antenna generated by resonance of the first sub-radiator of the common-body antenna of an embodiment;

[0034] Fig.10 for Figure 6 A schematic diagram of current distribution of an IFA three-quarter antenna mode generated by resonance of the first sub-radiator of the common body antenna of an embodiment;

[0035] Fig.11 for Figure 6 A schematic diagram of current distribution in a half-wavelength mode of a loop parasitic antenna generated by parasitic resonance of the second sub-radiator of the common-body antenna of an embodiment;

[0036] Fig.12 for Figure 6 A schematic diagram of current distribution in a three-half wavelength mode of a loop parasitic antenna generated by parasitic resonance of the second sub-radiator of the common body antenna of an embodiment;

[0037] Fig.13 for Figure 6 A schematic diagram of current distribution of a composite left-handed and right-handed antenna mode generated by resonance of the second sub-radiator of the common-body antenna of an embodiment;

[0038] Fig.14 for Figure 6 A schematic diagram of current distribution of a quarter-wavelength parasitic antenna mode formed by parasitic resonance of the first sub-radiator of the common body antenna of the embodiment;

[0039] Fig.15 for Figure 6 A simulation efficiency diagram of the common antenna of an embodiment;

[0040] Fig.16a for Figure 6 A simulation diagram of the radiation direction of the GPS L1 antenna pattern of the co-body antenna of the embodiment;

[0041] Fig.16b for Figure 6 A simulation diagram of the radiation direction of the GPS L5 antenna pattern of the co-body antenna of the embodiment;

[0042] Fig.16c for Figure 6 A simulation diagram of the radiation direction of the 2.4G WIFI antenna pattern of the common antenna of the embodiment;

[0043] Fig.16d for Figure 6 A simulation diagram of the radiation direction of the 5G WIFI antenna mode of the common antenna of the embodiment;

[0044] Fig.17A schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0045] Fig.18 This is a schematic structural diagram of an electronic device according to another embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0047] The present application provides a co-body antenna and an electronic device including the co-body antenna. The radiator of the co-body antenna can realize the co-body of multiple different antenna modes to reduce the space occupied by the antenna. The electronic device includes electronic devices such as mobile phones, tablets, and smart watches.

[0048] See also Figure 1 The present application provides a co-body antenna 100. The co-body antenna 100 includes a radiator 10, a first grounding point A, a second grounding point B, a first feeding point C, a second feeding point D, a first filtering circuit 30, and a second filtering circuit 40. The first grounding point A and the second grounding point B are both grounded. The first grounding point A and the second grounding point B are respectively located at two opposite ends of the radiator 10. A gap 11 is provided on the radiator 10, and the gap 11 divides the radiator 10 into a first sub-radiator 12 and a second sub-radiator 13. The first feeding point C is located on the first sub-radiator 12, and the second feeding point D is located on the second sub-radiator 13, and the first feeding point C and the second feeding point D are both connected to the RF front end 20. The RF signal generated by the RF front end 20 is transmitted to the radiator 10 via the first feeding point C and the second feeding point D, or the signal received by the radiator 10 is transmitted to the RF front end 20 via the first feeding point C and the second feeding point D. Specifically, the first feeding point C and the second feeding point D are connected to the RF front end 20 through a spring clip or a connecting line. One end of the first filter circuit 30 is connected in parallel between the first feeding point C and the RF front end 20, and the other end is grounded; one end of the second filter circuit 40 is connected in parallel between the second feeding point D and the RF front end 20, and the other end is grounded. The RF signal transmitted by the first feeding point C generates a plurality of working frequency bands of different antenna modes through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13, and the RF signal transmitted by the second feeding point D generates a plurality of working frequency bands of different antenna modes through the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12.

[0049] In the present application, the RF signal transmitted by the first feeding point C can generate a plurality of operating frequency bands of different antenna modes through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13. Moreover, the RF signal transmitted by the second feeding point D can generate a plurality of operating frequency bands of different antenna modes through the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12. Specifically, when the RF signal is fed into the first sub-radiator 12 through the first feeding point C, the transmitted RF signal causes the first sub-radiator 12 to generate a certain induced electromotive force. Since there is a gap 11 between the first sub-radiator 12 and the second sub-radiator 13, the gap 11 is equivalent to an equivalent capacitor, and the second sub-radiator 13 will also generate a certain induced electromotive force through capacitive coupling, that is, the second sub-radiator 13 generates a parasitic resonance of a certain frequency band.

[0050] In the present application, the working frequency band covered by the common antenna 100 is increased through the resonance generated by the first sub-radiator 12 and the second sub-radiator 13, and the parasitic resonance generated by the mutual influence between the first radiator 10 and the second radiator 10, and there is no need to increase the number of feeding points and radiators, which can further increase the number of antenna modes while avoiding increasing the space occupied by the antenna.

[0051] Further, in the present application, by setting two feeding points (including the first feeding point C and the second feeding point D) on the radiator 10 between the first grounding point A and the second grounding point B, compared with the antenna structure in which only one feeding point is set on the radiator 10 of two adjacent grounding points (that is, each radiator 10 is provided with a feeding point), the two feeding points in the present application can simultaneously transmit signals, so that multiple antenna modes can be generated on the radiator 10 at the same time, and different antenna modes share the radiator 10, thereby reducing the volume occupied by the antenna. Moreover, in the case of covering the same type of antenna mode, the present application can reduce the number of radiators by sharing the radiator 10, thereby reducing the occupied space of the common antenna 100. Moreover, in the present application, multiple antenna modes can be generated by two feeding points (the first feeding point C and the second feeding point D), which can reduce the number of feeding points compared with the antenna of the prior art, thereby reducing the number of springs or connecting lines connecting the feeding point and the RF front end and the number of resonant elements for adjusting the antenna mode, thereby simplifying the structure of the antenna and further reducing the occupied space of the antenna.

[0052] Furthermore, the present application connects one end of the first filter circuit 30 in parallel between the first feeding point C and the RF front end 20, and the other end is grounded; connects one end of the second filter circuit 40 in parallel between the second feeding point D and the RF front end 20, and the other end is grounded, thereby adjusting the feeding position of the RF signal through the first filter circuit 30 and the second filter circuit 40. Due to the different feeding positions, different antenna modes are generated, that is, through the first filter circuit 30 and the second filter circuit 40, the common antenna 100 can obtain more different antenna modes, thereby ensuring that the required antenna mode is obtained while avoiding increasing the antenna layout space.

[0053] In this embodiment, the first filter circuit 30 is a high-resistance low-pass filter circuit, and the high-resistance low-pass filter circuit can achieve a high-resistance low-pass filtering effect. Specifically, the high-resistance low-pass filtering effect means that the high-resistance low-pass filter circuit is a passband in the GPS frequency band and a stopband in the frequency band greater than or equal to 2.4GWIFI, that is, the first filter circuit 30 can pass the RF signal of the GPS frequency band, and does not allow the passage of the RF signal greater than or equal to the 2.4GWIFI frequency band. The second filter circuit 40 is a high-pass low-resistance filter circuit, and the high-pass low-resistance filter circuit can achieve a high-pass low-resistance filtering effect. Specifically, the high-pass low-resistance filtering effect means that the high-pass low-resistance filter circuit is a stopband in the GPS frequency band and a passband in the frequency band greater than or equal to 2.4GWIFI, that is, the second filter circuit 40 can pass the RF signal greater than or equal to the 2.4GWIFI frequency band and prevent the RF signal of the GPS frequency band from passing. The first filter circuit 30 is used to allow radio frequency signals in a certain frequency band to be grounded, and the second filter circuit 40 is used to allow radio frequency signals in a certain frequency band to be grounded, so that the ground feeding positions of different radio frequency signals are different, thereby obtaining different antenna modes.

[0054] In the present application, the structures of the first filter circuit 31 and the second filter circuit 32 can be in various forms. For example, see Figure 2 , Figure 2 3 is a schematic diagram of the structure of a filter circuit according to an embodiment of the present application, wherein the filter circuit includes a first capacitor 311 and a first inductor 312 connected in parallel. Figure 3 , Figure 3 This is a schematic diagram of the structure of the filter circuit of the second embodiment of the present application. Figure 3 The filter circuit of the embodiment shown is Figure 2 The difference between the structure of the filter circuit shown in FIG. 1 and FIG. 2 is that the filter circuit further includes a second inductor 313, which is connected in series with the first capacitor 311 and then connected in series with the first inductor 312. Figure 4 , Figure 4 This is a schematic diagram of the structure of the filter circuit of the third embodiment of the present application. Figure 4 The filter circuit of the embodiment shown is Figure 2 The difference between the structure of the filter circuit shown in FIG. 1 is that the filter circuit further includes a second capacitor 314, which is connected in series with the first capacitor 311 and the first inductor 312 arranged in parallel. The first capacitor 311 and the second capacitor 314 may be fixed capacitors or adjustable capacitors, and the first inductor 312 and the second inductor 313 may be fixed inductors or adjustable inductors. For example, Figure 5 As shown, Figure 5 Schematic diagram of the structure of the filter circuit of the fourth embodiment of the present application, Figure 5 The filter circuit of the embodiment shown is Figure 2 The difference between the structures of the filter circuits shown is that the first capacitor 311 is an adjustable capacitor.

[0055] In the present application, the first filter circuit 31 and the second filter circuit 32 can be Figures 2 to 4 The filter circuit shown in any embodiment, and the types of the first filter circuit 31 and the second filter circuit 32 can be the same or different. In this embodiment, the first filter circuit 31 and the second filter circuit 32 are Figure 2 The filter circuit of the embodiment shown. By adjusting the size of any one or more of the first capacitor 311, the second capacitor 314, the first inductor 312, and the second inductor 313 in the filter circuit to be different, the high-pass and low-resistance effect or the low-pass and high-resistance effect of the filter circuit can be achieved. In this embodiment, the first inductor 312 of the first filter circuit 31 is about 4nH, and the first capacitor 311 of the first filter circuit 31 is about 1pF, so as to obtain a high-resistance and low-pass filter circuit; the first inductor 312 of the second filter circuit 32 is about 6.8nH, and the first capacitor 311 of the first filter circuit 31 is about 1.5pF, so as to obtain a high-pass and low-resistance filter circuit.

[0056] For further information, see Figure 6In one embodiment of the present application, a tuning element 50 is also connected between the first feeding point C and / or the second feeding point D and the RF front end 20, and the tuning element 50 is used to adjust the type and working frequency band of each antenna mode of the common antenna 100. The type or number of the tuning elements 50 connected between the first feeding point C and / or the second feeding point D and the RF front end 20 is adjusted according to actual needs, so that the antenna mode of the common antenna 100 can meet the actual use requirements. In the present application, the tuning element 50 can be a capacitor element or an inductor element, and the capacitor element and the inductor element can be connected in parallel or in series between the first feeding point and / or the second feeding point and the RF front end. In this embodiment, the tuning element 50 includes a capacitor element connected between the second feeding point D and the RF front end 20. By setting a capacitor element between the second feeding point D and the RF front end 20, the second sub-radiator 13 can generate a composite left-handed antenna mode, so that the required working frequency band can be obtained while minimizing the size of the radiator 10 and saving the layout space of the antenna. It is understandable that in other embodiments of the present application, a tuning element such as a capacitor or an inductor may also be connected between the RF front end 20 and the first feeding point C to obtain a desired antenna mode.

[0057] See also Figure 7 , Figure 7 For this application Figure 6 The S parameter simulation diagram of the common body antenna 100 of the illustrated embodiment. The dark solid line is the S22 parameter simulation diagram of the working frequency band generated by the signal fed into the first feeding point C through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13; the light solid line is the S21 parameter simulation diagram of the common body antenna 100; the dark dotted line is the S11 parameter simulation diagram of the working frequency band generated by the signal fed into the second feeding point D through the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12. The horizontal axis is the frequency in GHz; the vertical axis is the S parameter value in dB. It can be seen from the figure that the signal fed into the first feeding point C through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13 generates at least five resonances including resonance a, resonance b, resonance c, resonance d, and resonance e; the signal fed into the second feeding point D through the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12 generates at least two resonances including resonance f and resonance g.

[0058] The signal fed into the first feeding point C generates an operating frequency band through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13, which covers the operating frequency band of the WIFI antenna and the Sub 6G antenna, so that the WIFI antenna and the Sub 6G antenna are co-existing, which can reduce the number of radiators, and can reduce the number of feeding points, the number of shrapnel connected to the feeding point and the RF front end, and the number of resonant elements used to adjust the antenna mode, thereby simplifying the structure of the antenna and saving the layout space of the co-existing antenna 100. In this embodiment, the WIFI antenna mode specifically includes a 2.4G WIFI antenna mode and a 5G WIFI antenna mode. The operating frequency of the 2.4G WIFI antenna mode is 2.4Ghz~2.5GHz, that is Figure 7 The frequency band corresponding to the resonance a in the middle position; the operating frequency of the 5G WIFI antenna mode is 4.9Ghz~5.9GHz, that is, Figure 7 The frequency band corresponding to the resonances d and e in the middle position. The Sub 6G antenna mainly refers to the frequency band of the antenna mode whose working frequency band is lower than 6GHz. In some embodiments of the present application, the Sub 6G frequency band mainly includes 5G frequency bands such as N77 frequency band, N78 frequency band and N79 frequency band, so that the common antenna 100 can meet the existing 5G communication needs. Among them, the operating frequency of the N77 antenna mode is 3.3Ghz~4.2GHz, the operating frequency of the N78 antenna mode is 3.3Ghz~3.8GHz, and the operating frequency of the N79 antenna mode is 4.4Ghz~5.0GHz, that is, Figure 7 The frequency band corresponding to the middle position resonances b and c.

[0059] Specifically, the working frequency bands that can be generated by the resonance of the first sub-radiator 12 include the first working frequency band, the second working frequency band and the third working frequency band, and the working frequency bands generated by the parasitic resonance of the second sub-radiator 13 include the fourth working frequency band and the fifth working frequency band. Among them, the first working frequency band covers the working frequency band of the 2.4G WIFI antenna, the second working frequency band and the fourth working frequency band cover the working frequency band of the Sub 6G antenna, and the third working frequency band and the fifth working frequency band cover the working frequency band of the 5G WIFI antenna. In these embodiments, the working frequency bands generated by the resonance of the first sub-radiator 12 and the parasitic resonance generated by the second sub-radiator 13 can cover the working frequency bands of the Sub 6G antenna, the 2.4G WIFI antenna, and the 5G WIFI antenna, that is, the radiator 10 can simultaneously realize the coexistence of the Sub 6G antenna, the 2.4G WIFI antenna, and the 5G WIFI antenna, saving the layout space of the coexistence antenna 100. It can be understood that in other embodiments of the present application, by adjusting the position of the first feeding point C and / or the second feeding point D, the position of the slot 11 or the size or shape of the radiator 10, the common antenna 100 can also generate other required working frequency bands.

[0060] Specifically, the first operating frequency band is the operating frequency band of the IFA quarter antenna mode generated by the resonance of the first sub-radiator 12, and its current distribution is as follows: Figure 8 The direction of the current in the IFA quarter antenna mode is the direction from the first grounding point A to the slot 11.

[0061] The second operating frequency band is a half wavelength mode of the loop antenna generated by the resonance of the first sub-radiator 12, and its current distribution is as follows: Fig. 9 Specifically, there is a current zero point between the first feeding point C and the first grounding point A, and the current flows from the first feeding point C and the first grounding point A to the current zero point direction. The current zero point refers to the position where the current is zero.

[0062] The third operating frequency band is the operating frequency band of the IFA three-quarter antenna mode generated by the resonance of the first sub-radiator 12, and its current distribution is as follows: Fig.10 There is a current zero point between the first feeding point C and the slot 11, and the current flows from the first feeding point C and the slot 11 to the current zero point respectively.

[0063] In this embodiment, since the second filter circuit 40 connected between the RF front end 20 and the second feeding point D is a high-pass low-resistance filter circuit, it can allow the RF signal of the fourth working frequency band to be fed to the ground through the second filter circuit 40. At the same time, the RF signal will pass through the second sub-radiator 13 and be grounded via the second grounding point B. At this time, the wavelength mode generated by the parasitic resonance of the second sub-radiator 13 is the half-wavelength mode of the loop parasitic antenna, and the working frequency band of the half-wavelength mode of the loop parasitic antenna covers the fourth working frequency band. The current distribution of the half-wavelength mode of the loop parasitic antenna is as follows: Fig.11 As shown by the arrow in the middle, a current zero point is formed between the second feeding point D and the second grounding point B, and the current flows from the second feeding point D and the second grounding point B to the current zero point.

[0064] In this embodiment, since the second filter circuit 40 connected between the RF front end 20 and the second feeding point D is a high-pass low-resistance filter circuit, it can allow the RF signal of the fifth working frequency band to be fed to the ground through the second filter circuit 40. At the same time, the RF signal will pass through the second sub-radiator 13 and be grounded via the second grounding point B. At this time, the wavelength mode generated by the parasitic resonance of the second sub-radiator 13 is the two-thirds wavelength mode of the loop parasitic antenna, and the working frequency band of the two-thirds wavelength mode of the loop parasitic antenna covers the fifth working frequency band. The current distribution of the two-thirds wavelength mode of the loop parasitic antenna is as follows: Fig.12 As shown by the arrow direction. Among them, two current zero points are formed between the second feeding point D and the second grounding point B, which are the first zero point and the second zero point, respectively, which are closer to the gap. And the current direction of the two-three wavelength mode of the loop parasitic antenna flows from the first zero point and the second grounding point B to the second zero point, and part of the current flows from the first zero point to the gap direction.

[0065] The operating frequency band generated by the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12 covers the operating frequency bands of the GPS L1 antenna mode and the GPS L5 antenna mode, so that the GPS L1 antenna and the GPS L5 antenna can be designed in a common body, the number of radiators can be reduced, and the number of feeding points, the number of springs connected to the feeding points and the RF front end, and the number of resonant elements used to adjust the antenna mode can be reduced, thereby simplifying the antenna structure and saving the layout space of the common antenna 100. Among them, the operating frequency band of the GPS L5 antenna is 1176.45MHz, that is, Figure 7 The frequency band corresponding to the mid-position resonance f; the operating frequency band of the GPS L1 antenna is 1575.42MHz, that is Figure 7 The frequency band corresponding to the mid-position resonance g.

[0066] Specifically, in this embodiment, the working frequency band generated by the resonance of the second sub-radiator 13 includes the sixth working frequency band, and the working frequency band generated by the parasitic resonance of the first sub-radiator 12 includes the seventh working frequency band. The sixth working frequency band covers the working frequency band of the GPS L5 antenna, and the seventh working frequency band covers the working frequency band of the GPS L1 antenna. Therefore, the working frequency band generated by the radiator 10 can simultaneously cover the working frequency band of the GPS L5 antenna and the working frequency band of the GPS L1 antenna, thereby realizing the coexistence of the GPS L1 antenna and the GPS L5 antenna and saving the layout space of the antenna.

[0067] In this embodiment, the sixth operating frequency band is the operating frequency band of the composite left-right-handed antenna mode (CRLH antenna mode) generated by the resonance of the second sub-radiator 13, and its current distribution is as follows: Fig.13 The current direction of the composite left-handed antenna mode is the direction from the second feeding point D to the second grounding point B via the second sub-radiator 13 .

[0068] In this embodiment, the sixth operating frequency band is generated by a composite left-handed antenna mode, and the length of the radiator 10 of the composite left-handed antenna mode is 1 / 8λ, that is, the length of the radiator between the first feeding point C and the first grounding point A is 1 / 8 of the wavelength. Compared with other antenna modes, the length of the radiator 10 is smaller, so that the layout space of the antenna can be further reduced.

[0069] Since the first filter circuit 30 connected between the RF front end 20 and the first feeding point C is a high-impedance low-pass filter circuit, it can allow the RF signal of the seventh working frequency band to be fed to the ground through the first filter circuit 30, so that the first sub-radiator 12 generates a parasitic resonance under the influence of the second sub-radiator 13 to form a quarter-wavelength parasitic antenna mode, and the operating frequency band of the quarter-wavelength parasitic antenna mode covers the seventh working frequency band. The current distribution of the quarter-wavelength parasitic antenna mode is as follows: Fig.14 The current direction of the quarter-wavelength parasitic antenna mode formed by the parasitic resonance is the direction from the slot 11 to the first grounding point A.

[0070] In some embodiments of the present application, the working frequency band generated by the resonance of the first sub-radiator and the parasitic resonance of the second sub-radiator covers the working frequency band of the WIFI antenna and the Sub 6G antenna. At the same time, the working frequency band generated by the resonance of the second sub-radiator and the parasitic resonance of the first sub-radiator covers the working frequency band of the GPS L1 antenna and the GPS L5 antenna, so that the WIFI antenna, the Sub 6G antenna, the GPS L1 antenna, and the GPS L5 antenna can be realized as a co-body, so that the co-body antenna covers the working frequency bands of multiple different antenna modes while occupying a small space. At the same time, the co-body antenna can achieve coverage of multiple antenna modes through two feeding points (the first feeding point and the second feeding point), which can reduce the number of feeding points compared to the antenna of the prior art, thereby reducing the number of springs or connecting lines connecting the feeding point to the RF front end and the number of resonant elements for adjusting the antenna mode, thereby simplifying the structure of the antenna and further reducing the space occupied by the antenna.

[0071] Furthermore, in the present application, the width of the slot 11 needs to be within a certain range to avoid the slot being too wide or too narrow, so as to ensure that under a certain working frequency band, the first radiator and the second radiator can affect each other and produce parasitic resonance, thereby increasing the number of antenna modes without increasing the antenna structure, so as to reduce the occupied space of the common antenna 100. In some embodiments of the present application, the width of the slot 11 is greater than one thirty-second wavelength of the highest resonant frequency and less than one sixteenth wavelength of the highest resonant frequency; the highest resonant frequency is the highest working frequency among the working frequencies of the multiple different antenna modes of the common antenna. Specifically, for the common antenna that realizes the WIFI antenna, Sub 6G antenna, GPS L1 antenna, and GPS L5 antenna, the highest resonant frequency is the working frequency band of the 5G WIFI.

[0072] See also Fig.15 , Fig.15 This is a simulation efficiency diagram of the common antenna 100 of an embodiment of the present application, wherein the horizontal axis is frequency in GHz, and the vertical axis is efficiency in dBp. It can be seen from the figure that the radiation efficiency of each working frequency band is above -5dBp, which has a high radiation efficiency. Moreover, the radiation efficiency of the frequency band above 3GHz is relatively high. The radiation efficiency of the GPSL1 antenna with a working frequency band of 1575.42MHz is about 1dB lower than the radiation efficiency of the GPSL5 antenna with a working frequency band of 1176.45MHz.

[0073] See also Fig.16a , Fig.16b as well as Fig.16c , Fig.16d . Fig.16a and Fig.16b These are the radiation direction simulation diagrams of the GPS L1 antenna mode and the GPS L5 antenna mode. It can be seen from the diagram that the upper hemisphere ratios of the GPSL5 antenna mode and the GPSL1 antenna mode are both above -3dB. The higher upper hemisphere ratio is beneficial to user experience. Fig.16c and Fig.16d They are the radiation direction simulation diagrams of the 2.4G WIFI antenna mode and the GPS L5 antenna mode. It can be seen from the figure that the directivity of the 2.4G WIFI antenna mode is about 4, and the directivity of the 5G WIFI antenna mode is about 5.5, and the directivity is better.

[0074] Further, in the present application, the distance from the first feeding point C to the slot 11, the distance from the second feeding point D to the slot 11, the distance from the first grounding point A to the slot 11, and the distance from the first grounding point A to the slot 11 also need to be within a certain range, so that the common antenna 100 can generate the required working frequency band to meet the needs of actual use. In some embodiments of the present application, the distance from the first feeding point C to the slot 11 is one sixteenth of the wavelength of the working frequency of the antenna mode formed between the two, and the distance from the second feeding point D to the slot 11 is one eighth of the wavelength of the working frequency of the antenna mode formed between the two; the distance from the first grounding point C to the slot 11 is one quarter of the wavelength of the working frequency of the antenna mode formed between the first grounding point C and the slot 11; the distance from the second grounding point B to the slot 11 is one quarter of the wavelength of the working frequency of the antenna mode formed between the two, thereby obtaining the various antenna modes in the above-mentioned embodiments.

[0075] See also Fig.17 , the present application also provides an electronic device 1000. The electronic device 1000 can be a mobile phone, a tablet, a mobile watch, etc. The electronic device 1000 includes a middle frame 110, a mainboard 120 and the common antenna 100, the middle frame 110 is grounded, and the first grounding point A and the second grounding point B of the common antenna 100 are connected to the middle frame 110 to achieve the grounding of the first grounding point A and the second grounding point B. The RF front end 20 of the common antenna 100 is arranged on the mainboard 120, and the mainboard 120 is arranged on the middle frame 110. Since the space occupied by the common antenna 100 is small, the required clearance is also small, so that more antennas can be arranged in a limited space and the performance of the antenna can be improved. In one embodiment of the present application, the clearance of the common antenna 100 is about 1.3mm.

[0076] Specifically, the middle frame 110 includes a middle plate 111 and a frame 112 surrounding the middle plate, the radiator 10 of the common antenna 100 is arranged between the middle plate 111 and the frame 112, and the main board 120 is fixed on the middle plate 111. In this embodiment, the frame 112 is a non-metallic frame, and the radio frequency signal generated or received by the radiator 10 can be transmitted through the non-metallic frame, thereby avoiding the restriction of the frame 112 on the signal generation of the common antenna 100. Among them, the common antenna 100 can be in the form of a flexible main board (Flexible Printed Circuit, FPC), an antenna form, a laser direct structuring (Laser-Direct-structuring, LDS) antenna form or a microstrip antenna (Microstrip Disk Antenna, MDA) and other antenna forms.

[0077] See also Fig.18 , other embodiments of the present application provide an electronic device 1100, the difference between the electronic device 1100 and the electronic device 1000 is that the frame 112 of the electronic device 1100 is a metal frame, and part of the metal frame is the radiator 10 of the shared antenna 100. By using the metal frame as the radiator 10 of the shared antenna 100, the space occupied by the shared antenna can be further reduced. In this embodiment, the gap 11 of the shared antenna 100 is located on the upper frame of the frame 112. It can be understood that in other embodiments of the present application, the gap 11 of the shared antenna 100 can also be located on the side frame of the frame 112.

[0078] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna, characterized in that: include: A radiator, wherein a gap is provided on the radiator, and the gap divides the radiator into a first sub-radiator and a second sub-radiator; a first grounding point and a second grounding point, wherein the first grounding point is located on the first sub-radiator, and the second grounding point is located on the second sub-radiator; A first feeding point and a second feeding point, wherein the first feeding point is located on the first sub-radiator between the first grounding point and the gap, and the second feeding point is located on the second sub-radiator between the second grounding point and the gap; The antenna further comprises a radio frequency front end and a first tuning element, wherein the first tuning element comprises a first capacitive element connected between the second feed point and the radio frequency front end; The radio frequency signal transmitted by the first feeding point includes the first antenna operating frequency band through the first resonance of the first sub-radiator, The radio frequency signal transmitted by the first feeding point includes a first parasitic operating frequency band through the first parasitic resonance of the second sub-radiator; The radio frequency signal transmitted by the second feeding point includes the second antenna operating frequency band through the second resonance of the second sub-radiator, The radio frequency signal transmitted by the second feeding point includes a second parasitic operating frequency band via the second parasitic resonance of the first sub-radiator.

2. The antenna according to claim 1, characterized in that The first capacitive element is connected in series between the second feeding point and the RF front end.

3. The antenna according to claim 1, characterized in that A frequency of the first resonance and a frequency of the first parasitic resonance are both higher than a frequency of the second resonance and a frequency of the second parasitic resonance.

4. The antenna according to claim 1, characterized in that The antenna further includes a first filtering circuit and a second filtering circuit, wherein the first filtering circuit is coupled to the first feeding point; and the second filtering circuit is coupled to the second feeding point.

5. The antenna according to claim 4, characterized in that One end of the first filter circuit is connected to the first feeding point, and the other end of the first filter circuit is grounded; one end of the second filter circuit is connected to the second feeding point, and the other end of the second filter circuit is grounded.

6. The antenna according to claim 5, characterized in that The first filter circuit is a high-resistance low-pass filter circuit, and the second filter circuit is a high-pass low-resistance filter circuit.

7. The antenna according to claim 6, characterized in that The first filter circuit and the second filter circuit both include a first capacitor and a first inductor which are connected in parallel.

8. The antenna according to claim 7, characterized in that The first filter circuit or the second filter circuit further includes a second inductor, and the second inductor is connected in series with the first capacitor.

9. The antenna according to claim 8, characterized in that The first filter circuit or the second filter circuit further includes a second capacitor, which is connected in series with the first capacitor and the first inductor which are arranged in parallel.

10. The antenna according to claim 1, wherein: The first antenna operating frequency band and the first parasitic operating frequency band include at least one frequency band of the Sub 6G frequency band.

11. The antenna according to claim 10, characterized in that The first antenna operating frequency band includes the N78 frequency band, and the first parasitic operating frequency band includes the N79 frequency band.

12. The antenna according to claim 1, wherein: The working frequency band generated by the first resonance of the first sub-radiator also includes a third antenna working frequency band and a fourth antenna working frequency band, and the working frequency band generated by the first parasitic resonance of the second sub-radiator also includes a third parasitic working frequency band.

13. The antenna according to claim 12, characterized in that The third antenna operating frequency band, the fourth antenna operating frequency band, and the third parasitic operating frequency band include 2.4G WIFI and 5G WIFI frequency bands.

14. The antenna according to claim 1, wherein: The first resonance of the first sub-radiator corresponds to: The IFA quarter antenna pattern of the first sub-radiator; and / or, a half wavelength mode of the loop antenna of the first sub-radiator; and / or, an IFA three-quarter antenna pattern of the first sub-radiator; and The first parasitic resonance of the second sub-radiator corresponds to: a half wavelength mode of a loop parasitic antenna of the second sub-radiator; and / or, The three-half wavelength mode of the loop parasitic antenna of the second sub-radiator.

15. The antenna according to claim 1, wherein: The distance from the first feeding point to the slot is one sixteenth of the wavelength of the working frequency of the antenna mode formed therebetween; the distance from the second feeding point to the slot is one eighth of the wavelength of the working frequency of the antenna mode formed therebetween; The distance from the first ground point to the gap is one quarter wavelength of the working frequency of the antenna mode formed between the first ground point and the gap; the distance from the second ground point to the gap is one quarter wavelength of the working frequency of the antenna mode formed between the two.

16. The antenna according to claim 1, wherein: The second antenna operating frequency band includes the GPS L5 frequency band, and the second parasitic operating frequency band includes the GPS L1 frequency band.

17. The antenna according to claim 1, wherein: The second antenna operating frequency band is the operating frequency band of the composite left-handed and right-handed antenna mode generated by the second resonance of the second sub-radiator.

18. The antenna according to claim 1, wherein: The second parasitic operating frequency band is an operating frequency band of an antenna mode generated by the second parasitic resonance of the first sub-radiator.

19. The antenna according to any one of claims 1, characterized in that: A second tuning element is connected between the first feeding point and the RF front end.

20. The antenna according to claim 19, characterized in that The second tuning element is connected in series between the second feeding point and the RF front end.

21. The antenna according to claim 20, characterized in that The second tuning element includes a second capacitive element, and the second capacitive element is used to adjust the type of the antenna mode and its operating frequency band.

22. The antenna according to claim 21, characterized in that The second capacitive element is used to enable the first sub-radiator to generate a composite left-handed antenna mode.

23. The antenna according to any one of claims 1 to 22, characterized in that: The RF front end is connected to the first feeding point and the second feeding point respectively and provides RF signals to the first feeding point and the second feeding point respectively through different feed sources.

24. The antenna according to claim 1, wherein: The first capacitive element is used to adjust the type of antenna mode and its operating frequency band.

25. The antenna according to claim 24, characterized in that The first capacitive element is used to enable the second sub-radiator to generate a composite left-handed antenna mode.

26. A terminal device, characterized in that: Comprising the antenna described in any one of claims 1-25.

27. The terminal device according to claim 26, characterized in that: The terminal device further includes: A mainboard, on which the radio frequency front end of the antenna is arranged; and The middle frame is grounded, and the first grounding point and the second grounding point of the antenna are both connected to the middle frame.

28. The terminal device according to claim 27, characterized in that: The middle frame includes a middle plate, the first sub-radiator and the second sub-radiator are both arranged around the middle plate, and there is a gap between the first sub-radiator and the second sub-radiator and the middle plate.

29. The terminal device according to claim 28, characterized in that The gap between the first sub-radiator and the middle plate provides clearance for the first sub-radiator, and the gap between the second sub-radiator and the middle plate provides clearance for the second sub-radiator.

30. The terminal device according to claim 28 or 29, characterized in that: The middle frame further includes a metal frame, which is arranged around the middle plate, and a portion of the metal frame is the radiator of the antenna.

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