CN111628298B

CN111628298B - Integrated antenna and electronic device

Info

Publication number: CN111628298B
Application number: CN201910278901.XA
Authority: CN
Inventors: 孙乔; 李堃; 卢亮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-27
Filing date: 2019-04-04
Publication date: 2022-03-11
Anticipated expiration: 2039-04-04
Also published as: CN111628298A

Abstract

A common antenna and a mobile terminal including the same are provided. The common antenna comprises a radiator, a first feed point and a second feed point, wherein the radiator is divided into a first sub-radiator and a second sub-radiator through a gap; the radio frequency signal transmitted by the first feed 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 feed 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. And 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 enable the common antenna to generate a plurality of different antenna modes. And each different antenna mode shares the radiator, and only need two feed-in points can, realize the antenna is in common and simplify antenna structure to reduce the occupation space of antenna in common.

Description

Integrated antenna and electronic device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a common antenna and an electronic device.

Background

With the continuous development of communication technology, more antennas need to be arranged in mobile terminals such as mobile phones. In addition, as mobile terminals such as mobile phones and the like have a high screen occupation ratio and multiple cameras, the clearance of the antenna is greatly reduced, and the layout space of the antenna is further compressed. Therefore, how to arrange more antennas in the limited headroom becomes a big problem in antenna design.

Disclosure of Invention

The application provides a common antenna and an electronic device, aiming at reducing the space occupied by the antenna so as to arrange more antennas in a limited clearance space.

In a first aspect, the present application provides a co-body antenna. The common antenna comprises a radiating body, a first grounding point, a second grounding point, a first feeding point, a second feeding point, a first filter circuit and a second filter circuit; the first grounding point and the second grounding point are grounded and are respectively positioned at two opposite ends of the radiator; a gap is arranged on the radiator, the gap divides the radiator into a first sub-radiator and a second sub-radiator, the first feed point is positioned on the first sub-radiator, and the second feed point is positioned on the second sub-radiator; one end of the first filter circuit is connected to the first feed point, and the other end of the first filter circuit is grounded; one end of the second filter circuit is connected to the second feed point, and the other end of the second filter circuit is grounded; the radio frequency signal transmitted by the first feed 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 feed 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.

In this application, through set up two at least feed points (including first feed point and second feed point) on the irradiator between first ground point and second ground point, for only setting up the antenna structure of a feed point (every irradiator is equipped with a feed point) on the irradiator of two adjacent ground points, two feed points can carry out signal transmission simultaneously in this application, so that can produce multiple antenna mode simultaneously on the irradiator, realize different antenna mode sharing irradiators to reduce the volume that the antenna occupy. In addition, under the condition of covering the same type of antenna modes, the common radiator can reduce the use of a feed point and a corresponding radio frequency element, so that the structure of the antenna is further simplified, and the occupied volume of the antenna is reduced.

In this application, will through setting up the gap the irradiator divide into first sub-irradiator with second sub-irradiator to it is right respectively first sub-irradiator feeds with the second self-irradiator respectively. When the first sub-radiator generates resonance due to the signal fed in by the first feeding point, the second sub-radiator generates parasitic resonance under the influence of the first sub-radiator; meanwhile, when the second sub-radiator resonates due to the signal fed from the second feeding point, the first sub-radiator may generate parasitic resonance under the influence of the second sub-radiator. Through the mutual influence between the first radiator and the second radiator, parasitic resonance can be generated on the common antenna, so that the working frequency range covered by the antenna is further increased, that is, the number of antenna modes can be further increased, and the increase of the occupied space of the antenna is avoided.

Furthermore, 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 feed point, and the other end of the second filter circuit is grounded, so that the ground feed position of the radio-frequency signal is adjusted through the first filter circuit and the second filter circuit. Different antenna modes are generated due to different feeding positions, namely, the common antenna can obtain more different antenna modes through the first filter circuit and the second filter circuit, so that the layout space of the antenna is prevented from being increased under the condition of ensuring the required antenna modes.

In an embodiment of the present application, first filter circuit is high resistance low pass filter circuit, high resistance low pass filter circuit is the passband at the frequency channel of GPS, is the stopband at the frequency channel that is greater than or equal to 2.4G WIFI, promptly first filter circuit can make the radio frequency signal of GPS frequency channel pass through to not allow the radio frequency signal of being greater than or equal to 2.4G WIFI frequency channel to pass through. The second filter circuit is a high-pass low-resistance filter circuit, the high-pass low-resistance filter circuit is a stop band at a GPS frequency band, and is a pass band at a frequency band greater than or equal to 2.4G WIFI, namely, the first filter circuit can enable radio-frequency signals greater than or equal to the 2.4G WIFI frequency band to pass through, and does not allow radio-frequency signals of the GPS frequency band to pass through. The first filter circuit is used for enabling radio-frequency signals in a certain frequency band to be grounded through the first filter circuit, and the second filter circuit is used for enabling radio-frequency signals in the certain frequency band to be grounded through the second filter circuit. By changing the position of the grounding point, the feeding positions of different radio frequency signals are different, and different antenna modes are obtained.

In an embodiment of the present application, the first filter circuit and the second filter circuit both include a first capacitor and a first inductor, which are connected in parallel.

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.

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.

In some embodiments of the present application, an operating frequency band generated by the parasitic resonance of the first Sub-radiator and the second Sub-radiator covers an operating frequency band of the WIFI antenna and the Sub6G antenna, that is, the radiator can be simultaneously used as a radiator of the WIFI antenna and the Sub6G antenna, so that the WIFI antenna and the Sub6G antenna are integrated. Further, in some embodiments, an 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 bands of the GPS L1 antenna and the GPS L5 antenna, that is, the radiator can be used as a radiator of the GPS L1 antenna and a radiator of the GPS L5 antenna at the same time, so that a common body of the GPS L1 antenna and the GPS L5 antenna is implemented. It can be understood that, in some embodiments, an operating frequency band generated by the first Sub-radiator resonance and the parasitic resonance of the second Sub-radiator covers operating frequency bands of the WIFI antenna and the Sub6G antenna, and meanwhile, an operating frequency band generated by the second Sub-radiator resonance and the parasitic resonance of the first Sub-radiator covers operating frequency bands of the GPS L1 antenna and the GPS L5 antenna, so that a common body of the WIFI antenna, the Sub6G antenna, the GPS L1 antenna, and the GPS L5 antenna can be implemented, and the common body antenna occupies a small space while covering operating frequency bands of a plurality of different antenna modes. Meanwhile, the common antenna can realize the coverage of multiple antenna modes through two feeding points (a first feeding point and a second feeding point), and compared with the antenna in the prior art, the number of the feeding points can be reduced, so that the number of elastic sheets or connecting lines connected with the radio frequency front end and resonant elements for adjusting the antenna modes can be reduced, the structure of the antenna is simplified, and the occupied space of the antenna is further reduced. In some embodiments of the present application, an operating frequency band generated by the first sub-radiator includes a first operating frequency band, a second operating frequency band, and a third operating frequency band, and an operating frequency band generated by the second sub-radiator parasitic resonance includes a fourth operating frequency band and a fifth operating 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 band of the Sub6G antenna and the working frequency band of the 2.4G WIFI and 5GWIFI antennas, that is, the radiator can realize the integration of the Sub6G antenna and the WIFI antenna at the same time, so that the layout space of the antennas is saved.

The Sub6G antenna is a frequency band of an antenna mode with an operating frequency band lower than 6G Hz. In some embodiments of the present application, the Sub6G bands mainly include 5G bands such as N77, N78, N79, etc. to meet the requirement of the existing 5G communication.

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

In some embodiments of the present application, the operating frequency band that second sub radiator resonance produced includes the sixth operating frequency band, the operating frequency band that first sub radiator parasitic resonance produced includes the seventh operating frequency band, the operating frequency band that the sixth operating frequency band covered the GPS L5 antenna, the operating frequency band that the seventh operating frequency band covered the GPS L1 antenna makes the operating frequency band that the radiator produced can cover the operating frequency band of GPS L5 antenna and the operating frequency band of GPS L1 antenna simultaneously, thereby realizes the integration of GPS L1 antenna and GPS L5 antenna, saves the layout space of antenna.

In some embodiments, the sixth operating frequency band is an operating frequency band of a composite right-left-handed antenna mode generated by the second sub-radiator, and the seventh operating frequency band is an operating frequency band with an antenna mode generated by the first sub-radiator parasitic resonance. The sixth operating frequency band is generated by a composite right-left hand antenna pattern, the length of a radiator of the composite right-left hand antenna pattern is 1/8 lambda, and compared with other antenna patterns, the length of the radiator is smaller, so that the layout space of the antenna can be further reduced.

Specifically, in some embodiments, a tuning element is connected between the first feeding point and/or the second feeding point and the radio frequency front end, and the tuning element is configured to adjust a type of each antenna mode of the common antenna and an operating frequency band of the common antenna. The type of the tuning element connected between the first feeding point and/or the second feeding point and the radio frequency front end is adjusted according to actual requirements, so that an antenna mode generated by the common antenna can meet the requirements of actual use. In this application, the tuning element may be a capacitive element or an inductive element, and the capacitive element and the inductive element may be connected in parallel or in series between the first feeding point and/or the second feeding point and the radio frequency front end.

In an embodiment of the application, the tuning element comprises a capacitive element connected between the second feeding point and the rf front end. And a capacitive element is arranged between the second feed point and the radio frequency front end, so that a composite left-right hand antenna is formed from the radio frequency front end to the second grounding point, a certain working frequency band can be obtained, the size of a radiating body can be reduced as much as possible, and the layout space of the antenna is saved.

In the present application, the width of the gap is greater than one thirty-two wavelengths of the highest resonant frequency and less than one sixteenth wavelength of the highest resonant frequency; the highest resonant frequency is a highest operating frequency of a plurality of different operating frequencies of the antenna modes of the common antenna.

In this application, need will the width control of gap is avoided at certain within range the width of gap is too wide or too narrow to guarantee under certain operating frequency range, first irradiator with can influence each other and produce parasitic resonance between the second irradiator.

In some embodiments of the present application, a distance from the first feeding point to the slot is one sixteenth wavelength of an operating frequency of an antenna mode formed between the first feeding point and the slot, and a distance from the second feeding point to the slot is one eighth wavelength of the operating frequency of the antenna mode formed between the second feeding point and the slot; the distance from the first grounding point to the gap is a quarter wavelength of the operating frequency of an antenna mode formed between the first grounding point and the gap; the distance from the second grounding point to the slot is a quarter wavelength of the operating frequency of the antenna mode formed between the second grounding point and the slot. In the application, the distance from the first feeding point to the gap, the distance from the second feeding point to the gap, the distance from the first grounding point to the gap, and the distance from the first grounding point to the gap are designed to be within a certain range, so that the common antenna can generate a required working frequency band to meet the requirement of practical use.

In a second aspect, the present application further provides an electronic device. The electronic equipment comprises a middle frame, a main board and the common antenna, wherein the middle frame is grounded, and a first grounding point and a second grounding point of the common antenna are both connected with the middle frame so as to realize the grounding of the first grounding point and the second grounding point. The radio frequency front end of the common antenna is arranged on the mainboard, and the mainboard is arranged on the middle frame. Because the space occupied by the common antenna is smaller, the required headroom is also smaller, and the layout in the electronic equipment can be more compact.

In some embodiments of the present application, the electronic device includes a metal frame surrounding the motherboard and the middle frame, a portion of the metal frame is a radiator of the common antenna, the metal frame serving as the radiator and the motherboard are spaced apart to form a gap, and the gap is a clearance area of the common antenna. The metal frame is used as a radiator of the common antenna, so that the space occupied by the common antenna can be further reduced.

Drawings

To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a co-body antenna according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first embodiment of a filter circuit in a common antenna according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second embodiment of a filter circuit in a common antenna according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a third embodiment of a filter circuit in a common antenna according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a fourth embodiment of a filter circuit in a co-body antenna according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a co-body antenna according to another embodiment of the present application;

FIG. 7 is a simulation diagram of S-parameters of the co-body antenna of the embodiment of FIG. 6;

fig. 8 is a schematic diagram of a current distribution of an IFA quarter antenna pattern generated by resonance of a first sub-radiator of the common antenna in the embodiment of fig. 6;

fig. 9 is a schematic diagram of a current distribution of a half-wavelength mode of the loop antenna generated by resonance of the first sub-radiator of the co-body antenna in the embodiment of fig. 6;

fig. 10 is a schematic diagram illustrating a current distribution of an IFA three-quarter antenna pattern generated by resonance of a first sub-radiator of the common antenna in the embodiment of fig. 6;

fig. 11 is a schematic view of a current distribution of a half-wavelength mode of a loop parasitic antenna generated by a second sub-radiator parasitic resonance of the co-body antenna in the embodiment of fig. 6;

fig. 12 is a schematic diagram illustrating a current distribution of a three-half wavelength mode of a loop parasitic antenna generated by a second sub-radiator parasitic resonance of the co-body antenna in the embodiment of fig. 6;

fig. 13 is a schematic diagram of a current distribution of a composite left-right hand antenna mode generated by resonance of a second sub-radiator of the co-body antenna in the embodiment of fig. 6;

fig. 14 is a schematic diagram of a current distribution of a quarter-wave parasitic antenna mode formed by a first sub-radiator parasitic resonance of the common antenna in the embodiment of fig. 6;

FIG. 15 is a graph of simulated efficiency for the co-body antenna of the embodiment of FIG. 6;

FIG. 16a is a simulated view of the radiation direction of the GPS L1 antenna pattern of the co-body antenna of the embodiment of FIG. 6;

FIG. 16b is a simulated view of the radiation direction of the GPS L5 antenna pattern of the co-body antenna of the embodiment of FIG. 6;

fig. 16c is a simulation diagram of the radiation direction of the 2.4G WIFI antenna mode of the co-body antenna of the embodiment of fig. 6;

fig. 16d is a simulation diagram of the radiation direction of the 5G WIFI antenna mode of the common antenna in the embodiment of fig. 6;

fig. 17 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of an electronic device according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

A common antenna and an electronic device including the same are provided. The radiator of the common antenna can realize the common body of various different antenna modes so as to reduce the occupied space of the antenna. The electronic equipment comprises electronic equipment such as a mobile phone, a tablet, an intelligent watch and the like.

Referring to fig. 1, a co-body antenna 100 is provided. The common antenna 100 includes a radiator 10, a first ground point a, a second ground point B, a first feeding point C, a second feeding point D, a first filter circuit 30, and a second filter 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. The radiator 10 is provided with a slot 11, and the slot 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, the second feeding point D is located on the second sub-radiator 13, and both the first feeding point C and the second feeding point D are connected to the radio frequency front end 20. The radio frequency signal generated by the radio frequency front end 20 is transmitted to the radiator 10 through the first feeding point C and the second feeding point D, or the signal received by the radiator 10 is transmitted to the radio frequency front end 20 through 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 radio frequency front end 20 through an elastic piece 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 radio frequency 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 radio frequency 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.

In this application, the rf signal transmitted by the first feeding point C passes through the resonance of the first sub-radiator 12 and the parasitic resonance of the second sub-radiator 13, so as to generate a plurality of working frequency bands with different antenna modes. And, the rf signal transmitted by the second feeding point D can generate a plurality of operating frequency bands of different antenna modes by the resonance of the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12. Specifically, when a radio frequency signal is fed into the first sub-radiator 12 through the first feeding point C, the transmitted radio frequency signal causes the first sub-radiator 12 to generate a certain induced electromotive force. Since a gap 11 is formed between the first sub-radiator 12 and the second sub-radiator 13, the gap 11 is equivalent to an equivalent capacitance, and the second sub-radiator 13 also generates a certain induced electromotive force through capacitive coupling, that is, the second sub-radiator 13 generates a parasitic resonance in a certain frequency band.

In this application, through first sub radiator 12 with the resonance that second sub radiator 13 produced, and the parasitic resonance that produces of the influence each other between first radiator 10 and the second radiator 10 increases the operating frequency range that altogether body antenna 100 covered to need not increase the quantity of feed point and radiator, can be further when increasing the quantity of antenna mode, avoid increasing the occupation space of antenna.

Further, in the present application, by providing 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 an antenna structure in which only one feeding point is provided on the radiator 10 of two adjacent grounding points (i.e. each radiator 10 is provided with one feeding point), the two feeding points in the present application can simultaneously perform signal transmission, so that multiple antenna modes can be simultaneously generated on the radiator 10, and the radiator 10 can be shared by different antenna modes, thereby reducing the volume occupied by the antenna. In addition, when the same type of antenna pattern is covered, the number of radiators can be reduced by the common radiator 10 in the present application, and the occupied space of the common antenna 100 can be reduced. In addition, multiple antenna modes can be generated through two feeding points (a first feeding point C and a second feeding point D), and compared with the antenna in the prior art, the number of the feeding points can be reduced, so that the number of spring pieces or connecting lines connected with the radio frequency front end and resonant elements for adjusting the antenna modes can be reduced, the structure of the antenna is simplified, and the occupied space of the antenna is further reduced.

Further, 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, so that the ground feeding position of the rf signal is adjusted by the first filter circuit 30 and the second filter circuit 40. Due to the difference of the feeding positions, different antenna modes are generated, that is, the first filter circuit 30 and the second filter circuit 40 enable the common antenna 100 to obtain more different antenna modes, thereby avoiding increasing the layout space of the antenna under the condition of ensuring to obtain the required antenna mode.

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 filtering effect of the high-impedance and low-pass filter circuit means that the high-impedance and low-pass filter circuit is a pass band in the GPS frequency band and a stop band in the frequency band greater than or equal to 2.4GWIFI, that is, the first filter circuit 30 can allow radio frequency signals in the GPS frequency band to pass through, and does not allow radio frequency signals in the frequency band greater than or equal to 2.4GWIFI to pass through. The second filter circuit 40 is a high-pass low-resistance filter circuit, and the high-pass low-resistance filter circuit can achieve a filtering effect of high-pass low-resistance. Specifically, the filtering effect of high-pass and low-pass means that the high-pass and low-pass filtering circuit is a stop band in the GPS frequency band and is a pass band in the frequency band greater than or equal to 2.4GWIFI, that is, the second filtering circuit 40 can allow the radio frequency signals greater than or equal to 2.4GWIFI to pass through and block the radio frequency signals in the GPS frequency band from passing through. The first filter circuit 30 is used for grounding the radio frequency signals in a certain frequency band through the first filter circuit 30, and the second filter circuit 40 is used for grounding the radio frequency signals in the certain frequency band through the second filter circuit 40, so that the feeding positions of different radio frequency signals are different, and different antenna modes are obtained.

In the present application, the first filter circuit 31 and the second filter circuit 32 may have various configurations. For example, referring to fig. 2, fig. 2 is a schematic structural diagram of a filter circuit according to an embodiment of the present application, where the filter circuit includes a circuit including a first capacitor 311 and a first inductor 312, which are arranged in parallel. Referring to fig. 3, fig. 3 is a schematic structural diagram of a filter circuit according to a second embodiment of the present application, and the difference between the structure of the filter circuit shown in fig. 3 and the structure of the filter circuit shown in fig. 2 is: the filter circuit further includes a second inductor 313, and the second inductor 313 is connected in series with the first inductor 312 after being connected in series with the first capacitor 311. Referring to fig. 4, fig. 4 is a schematic structural diagram of a filter circuit according to a third embodiment of the present application, and the difference between the structure of the filter circuit of the embodiment shown in fig. 4 and the structure of the filter circuit shown in fig. 2 is: the filter circuit further includes a second capacitor 314, and the second capacitor 314 is connected in series with the first capacitor 311 and the first inductor 312 which are 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, as shown in fig. 5, fig. 5 is a schematic structural diagram of a filter circuit according to a fourth embodiment of the present application, and the difference between the structure of the filter circuit according to the embodiment shown in fig. 5 and the structure of the filter circuit shown in fig. 2 is: the first capacitor 314 is an adjustable capacitor.

In this application, the first filter circuit 31 and the second filter circuit 32 may be the filter circuits shown in any one of fig. 2 to 4, and the types of the first filter circuit 31 and the second filter circuit 32 may be the same or different. In this embodiment, the first filter circuit 31 and the second filter circuit 32 are both the filter circuits of the embodiment shown in fig. 2. The effect of high-pass and low-resistance or the effect of low-pass and high-resistance of the filter circuit is realized 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. 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-impedance 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 low-resistance filter circuit.

Further, referring to fig. 6, in an embodiment of the present application, a tuning element 50 is further 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 for adjusting types of antenna modes and operating frequency bands of the common antenna 100. The type or number of tuning elements 50 connected between the first feeding point C and/or the second feeding point D and the rf front end 20 can be adjusted according to actual requirements, so that the antenna pattern of the co-body antenna 100 can meet the requirements of actual use. In this application, the tuning element 50 may be a capacitive element or an inductive element, and the capacitive element and the inductive element may be connected in parallel or in series between the first feeding point and/or the second feeding point and the radio frequency front end. In this embodiment, the tuning element 50 includes a capacitive element connected between the second feeding point D and the rf front end 20. By arranging the capacitive element between the second feeding point D and the radio frequency front end 20, the second sub-radiator 13 can generate a composite right-hand and left-hand antenna mode, so that the size of the radiator 10 can be reduced as much as possible while a required working frequency band can be obtained, and the layout space of the antenna is saved. It will be appreciated that in other embodiments of the present application, a tuning element such as a capacitive element or an inductive element may also be connected between the rf front-end 20 and the first feeding point C to obtain a desired antenna pattern.

Referring to fig. 7, fig. 7 is a simulation diagram of S parameters of the co-body antenna 100 according to the embodiment shown in fig. 6. The solid dark line is an S22 parameter simulation diagram of a working frequency band generated by a signal fed from the first feeding point C resonating through the first sub-radiator 12 and a parasitic resonating through the second sub-radiator 13; the light solid line is an S21 parameter simulation diagram of the co-body antenna 100; the dashed dark line is a simulation diagram of S11 parameters of the operating frequency band generated by the resonance of the signal fed from the second feeding point D through the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12. Wherein, the abscissa is frequency, and the unit is GHz; the ordinate is the S parameter value in dB. As can be seen from the figure, the signal fed from the first feeding point C resonates via 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 from the second feeding point D resonates at the second sub-radiator 13 and the parasitic resonance of the first sub-radiator 12 generates at least two resonances including a resonance f and a resonance g.

The working frequency band generated by the resonance of the signal fed from the first feeding point C through the first Sub-radiator 12 and the parasitic resonance of the second Sub-radiator 13 covers the working frequency band of the WIFI antenna and the Sub6G antenna, i.e., the WIFI antenna and the Sub6G antenna are integrated, the number of radiators can be reduced, the number of feeding points, the number of spring pieces connected to the feeding point and the radio frequency front end, and the number of resonant elements for adjusting the antenna mode, etc. can be reduced, thereby simplifying the structure of the antenna and saving the layout space of the integrated antenna 100. In this embodiment, the WIFI antenna modes specifically include a 2.4G WIFI antenna mode and a 5G WIFI antenna mode. The working frequency of the 2.4G WIFI antenna mode is 2.4 Ghz-2.5 GHz, namely the frequency band corresponding to the position resonance a in fig. 7; the working frequency of the 5G WIFI antenna mode is 4.9 Ghz-5.9 Ghz, i.e. the frequency band corresponding to the position resonances d, e in fig. 7. The Sub6G antenna mainly refers to a frequency band of an antenna mode with an operating frequency band lower than 6G Hz. In some embodiments of the present application, the Sub6G band mainly includes 5G bands such as an N77 band, an N78 band, and an N79 band, so that the antenna 100 can meet the requirement of the existing 5G communication. The operating frequency of the N77 antenna mode is 3.3Ghz to 4.2Ghz, the operating frequency of the N78 antenna mode is 3.3Ghz to 3.8Ghz, and the operating frequency of the N79 antenna mode is 4.4Ghz to 5.0Ghz, which is a frequency band corresponding to the position resonances b and c in fig. 7.

Specifically, the working frequency band that the resonance of the first sub-radiator 12 can generate includes a first working frequency band, a second working frequency band and a third working frequency band, and the working frequency band that the parasitic resonance of the second sub-radiator 13 generates includes a fourth working frequency band and a 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 12 and the parasitic resonance generated by the second Sub-radiator 13 can cover the working frequency band of the Sub6G antenna, the 2.4G WIFI antenna, and the 5 gwifii antenna, that is, the radiator 10 can simultaneously realize the union of the Sub6G antenna, the 2.4G WIFI antenna, and the 5GWIFI antenna, so as to save the layout space of the antenna 100. It is understood that in other embodiments of the present application, the common body antenna 100 can also generate other required operating frequency bands 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.

Specifically, the first operating frequency band is an operating frequency band of an IFA quarter antenna mode generated by resonance of the first sub-radiator 12, and a current distribution of the first operating frequency band is shown in an arrow direction in fig. 8. The current direction of the IFA quarter antenna pattern is the direction from the first grounding point a to the slot 11.

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 the current distribution is shown in the direction of the arrow in fig. 9. Specifically, a current zero point is provided 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 respectively. Here, the current zero point is a position where the current is 0.

The third operating frequency band is an operating frequency band of an IFA three-quarter antenna mode generated by the first sub-radiator 12 through resonance, and current distribution of the third operating frequency band is shown in an arrow direction in fig. 10. A current zero point is provided 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.

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-impedance filter circuit, the rf signal in the fourth operating band can be allowed to pass through the second filter circuit 40 and be fed to the ground. Meanwhile, the rf signal is grounded through the second sub-radiator 13 and the second grounding point B. At this time, the wavelength mode generated by the parasitic resonance of the second sub radiator 13 is a half wavelength mode of the loop parasitic antenna, and the operating frequency band of the half wavelength mode of the loop parasitic antenna covers the fourth operating frequency band. The current distribution of the one-half wavelength mode of the loop parasitic antenna is shown by the arrow direction in fig. 11. A current zero point is formed between the second feeding point D and the second grounding point B, and current flows from the second feeding point D and the second grounding point B to the current zero point, respectively.

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-impedance filter circuit, the rf signal in the fifth operating band can be allowed to pass through the second filter circuit 40 and be fed to the ground. Meanwhile, the rf signal is grounded through the second sub-radiator 13 and the second grounding point B. At this time, the wavelength mode generated by the parasitic resonance of the second sub radiator 13 is the three-half wavelength mode of the loop parasitic antenna, and the operating frequency band of the three-half wavelength mode of the loop parasitic antenna covers the fifth operating frequency band. The current distribution of the three-half wavelength mode of the loop parasitic antenna is shown by the arrow direction in fig. 12. Two current zero points are formed between the second feeding point D and the second grounding point B, and are a first zero point and a second zero point respectively, which are closer to the gap than the first zero point and the second zero point. And the current directions of the three-half wavelength mode of the loop parasitic antenna flow from the first zero point and the second ground point B to the second zero point, respectively, and part of the current flows from the first zero point to the slot direction.

The working frequency band that the second sub radiator 13 resonance and the parasitic resonance of first sub radiator 12 produced covers the working frequency band of GPS L1 antenna mode and GPS L5 antenna mode to make GPS L1 antenna and GPS L5 antenna design altogether, can reduce the quantity of radiator, and can reduce the quantity of feed-in point, connect in the quantity of feed-in point and the shell fragment of radio frequency front end, and be used for adjusting the quantity of resonant element etc. of antenna mode, thereby simplify the structure of antenna, and save the overall arrangement space of the antenna that altogether 100. The working frequency band of the GPS L5 antenna is 1176.45MHz, that is, the frequency band corresponding to the position resonance f in fig. 7; the working frequency band of the GPS L1 antenna is 1575.42MHz, i.e., the frequency band corresponding to the position resonance g in fig. 7.

Specifically, in this embodiment, the working frequency band generated by the resonance of the second sub-radiator 13 includes a sixth working frequency band, the working frequency band generated by the parasitic resonance of the first sub-radiator 12 includes a 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, so that 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 common body of the GPS L1 antenna and the GPS L5 antenna, and saving the layout space of the antenna.

In this embodiment, the sixth operating frequency band is an operating frequency band of a composite right-left hand antenna mode (CRLH antenna mode) generated by resonance of the second sub-radiator 13, and a current distribution of the sixth operating frequency band is as shown in fig. 13. The current direction of the composite right-left-handed antenna mode is the direction from the second feeding point D to the second grounding point B through the second radiator 13.

In this embodiment, the sixth operating frequency band is generated by a composite right and left-handed antenna mode, where the length of the radiator 10 of the composite right and left-handed antenna mode is 1/8 λ, 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. The length of the radiator 10 is smaller than that of other antenna patterns, so that the layout space of the antenna can be further reduced.

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, the rf signal in the seventh working frequency band can be allowed to pass through the first filter circuit 30 to be fed to the ground, so that the first sub-radiator 12 forms a quarter-wavelength parasitic antenna mode by the parasitic resonance generated under the influence of the second sub-radiator 13, and the working frequency band of the quarter-wavelength parasitic antenna mode covers the seventh working frequency band. The current distribution of the quarter-wave parasitic antenna mode is shown in fig. 14. The current direction of the quarter-wave parasitic antenna mode formed by the parasitic resonance is the direction from the slot 11 to the first grounding point a.

In some embodiments of this application, the working frequency range that the first Sub radiator resonance and the parasitic resonance of second Sub radiator produced covers the working frequency range of WIFI antenna and Sub6G antenna, and simultaneously, the second Sub radiator resonance and the working frequency range that the parasitic resonance of first Sub radiator produced covers the working frequency range of GPS L1 antenna and GPS L5 antenna to can realize the corporate of WIFI antenna, Sub6G antenna and GPS L1 antenna, GPS L5 antenna, make the corporate antenna is when covering the working frequency range of a plurality of different antenna modes, and occupation space is less. Meanwhile, the common antenna can realize the coverage of multiple antenna modes through two feeding points (a first feeding point and a second feeding point), and compared with the antenna in the prior art, the number of the feeding points can be reduced, so that the number of elastic sheets or connecting lines connected with the radio frequency front end and resonant elements for adjusting the antenna modes can be reduced, the structure of the antenna is simplified, and the occupied space of the antenna is further reduced.

Further, in this application, the width of gap 11 needs to be in certain within range, avoids the width of gap is too wide or too narrow to guarantee under certain operating frequency range, first irradiator with can influence each other and produce parasitic resonance between the second irradiator, thereby increase the quantity of antenna mode in the condition that does not increase antenna structure, with the occupation space that reduces altogether body antenna 100. In some embodiments of the present application, the width of the gap 11 is one thirty-two wavelengths longer than the highest resonant frequency and less than one sixteenth wavelength longer than the highest resonant frequency; the highest resonant frequency is a highest operating frequency of a plurality of different operating frequencies of the antenna modes of the common antenna. Specifically, for the common antenna for implementing the WIFI antenna, the Sub6G antenna, the GPS L1 antenna, and the GPS L5 antenna, the highest resonant frequency is the operating frequency band of the 5G WIFI.

Referring to fig. 15, fig. 15 is a graph of simulation efficiency of the co-body antenna 100 according to an embodiment of the present application, wherein the abscissa is frequency and the unit is GHz; the ordinate is efficiency in dBp. As can be seen from the figure, the radiation efficiency of each working frequency band is more than-5 dBp, and the radiation efficiency is higher. And the radiation efficiency of the frequency band above 3GHz is higher. The radiation efficiency of the GPSL1 antenna with the working frequency band of 1575.42MHz is about 1dB lower than that of the GPSL5 antenna with the working frequency band of 1176.45 MHz.

Please refer to fig. 16a and 16b, and fig. 16c and 16 d. Fig. 16a and 16b are simulated diagrams of radiation directions of the GPS L1 antenna mode and the GPS L5 antenna mode, respectively, and it can be seen from the diagrams that the upper hemispherical ratios of the GPS L5 antenna mode and the GPS L1 antenna mode are both above-3 dB, and the upper hemispherical ratio is high, which is beneficial to user experience. Fig. 16c and 16d are simulated views of radiation directions of the 2.4G WIFI antenna mode and the GPS L5 antenna mode, respectively, and it can be seen from the drawings 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.

Further, in the present application, a distance from the first feeding point C to the slot 11, a distance from the second feeding point D to the slot 11, a distance from the first grounding point a to the slot 11, and a 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 a required working frequency band to meet requirements of practical use. In some embodiments of the present application, a distance from the first feeding point C to the slot 11 is one sixteenth wavelength of an operating frequency of an antenna mode formed therebetween, and a distance from the second feeding point D to the slot 11 is one eighth wavelength of the operating frequency of the antenna mode formed therebetween; the distance from the first grounding point C to the slot 11 is a quarter wavelength of the operating frequency of the antenna mode formed between the first grounding point C and the slot 11; the distance of the second grounding point B to the slot 11 is a quarter wavelength of the operating frequency of the antenna mode formed therebetween, so that the respective antenna modes in the above-described embodiments are obtained.

Referring to fig. 17, the present application further provides an electronic device 1000. The electronic device 1000 may be a mobile phone, a tablet, a mobile watch, etc. The electronic device 1000 includes a middle frame 110, a main board 120, and the common antenna 100, wherein the middle frame 110 is grounded, and a first grounding point a and a second grounding point B of the common antenna 100 are both connected to the middle frame 110, so as to realize grounding of the first grounding point a and the second grounding point B. The rf front end 20 of the common antenna 100 is disposed on the main board 120, and the main board 120 is disposed on the middle frame 110. Because the space occupied by the common antenna 100 is smaller, the required headroom is also smaller, so that more antennas can be arranged in the limited space, and the performance of the antennas is improved. In one embodiment of the present application, the clearance of the common antenna 100 is about 1.3 mm.

Specifically, the middle frame 110 includes a middle plate 111 and a frame 112 surrounding the middle plate, the radiator 10 of the collective antenna 100 is disposed 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-metal frame, and the radio frequency signal generated or received by the radiator 10 can pass through the non-metal frame for transmission, so as to avoid the limitation of the frame 112 on the signal generation of the common antenna 100. The form of the integrated Antenna 100 may be a Flexible Printed Circuit (FPC) Antenna, a Laser-Direct-structuring (LDS) Antenna, or a Microstrip Antenna (MDA) Antenna.

Referring to fig. 18, another embodiment of the present application provides an electronic device 1100, where the electronic device 1100 differs from the electronic device 1000 in that: the frame 112 of the electronic device 1100 is a metal frame, and a part of the metal frame is the radiator 10 of the co-body antenna 100. By using the metal bezel as the radiator 10 of the common antenna 100, the space occupied by the common antenna can be further reduced. In this embodiment, the slot 11 of the common antenna 100 is located on the upper frame of the frame 112. It is understood that in other embodiments of the present application, the slot 11 of the co-body antenna 100 may be located on the side frame of the frame 112.

The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A kind of common body antenna, characterized by, including the radiator, the first grounding point, the second grounding point, the first feed point, the second feed point; the first grounding point and the second grounding point are grounded and are respectively positioned at two opposite ends of the radiator; a gap is arranged on the radiator, the gap divides the radiator into a first sub-radiator and a second sub-radiator, the first feed point is positioned on the first sub-radiator, and the second feed point is positioned on the second sub-radiator;

the working frequency band generated by the first resonance of the first sub-radiator of the radio frequency signal transmitted by the first feeding point comprises a first working frequency band,

the working frequency band generated by the radio-frequency signal transmitted by the first feeding point through the first parasitic resonance of the second sub-radiator comprises a second working frequency band;

the operating frequency band generated by the radio frequency signal transmitted by the second feeding point through the second resonance of the second sub-radiator comprises a third operating frequency band,

the working frequency band generated by the radio frequency signal transmitted by the second feed point through the second parasitic resonance of the first sub-radiator comprises a fourth working frequency band.

2. The common-body antenna according to claim 1, further comprising a first filter circuit and a second filter circuit, one end of the first filter circuit being connected to the first feeding point, the other end of the first filter circuit being 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.

3. The co-body antenna of claim 2, wherein the first filter circuit and the second filter circuit each comprise a first capacitor and a first inductor arranged in parallel.

4. The co-body antenna of claim 3, wherein the first filter circuit or the second filter circuit further comprises a second inductor, the second inductor being in series with the first capacitor.

5. The co-body antenna of claim 4, wherein the first filter circuit or the second filter circuit further comprises a second capacitor in series with the first capacitor and the first inductor arranged in parallel.

6. The co-body antenna of claim 1, wherein the first operating band and the second operating band cover at least a portion of a Sub6G band.

7. The co-body antenna of claim 6, wherein the first operating frequency band covers at least a portion of an N78 frequency band, and the second operating frequency band covers at least a portion of an N79 frequency band.

8. The co-body antenna of claim 1, wherein the operating band generated by the first resonance of the first sub-radiator further includes a fifth operating band and a sixth operating band, and the operating band generated by the first parasitic resonance of the second sub-radiator further includes a seventh operating band.

9. The co-body antenna of claim 8, wherein the fifth operating frequency band, the sixth operating frequency band, and the seventh operating frequency band cover at least a portion of 2.4G WIFI and 5G WIFI frequency bands.

10. The co-body antenna of claim 6,

the first resonance of the first sub-radiator corresponds to:

an IFA quarter antenna pattern of the first sub-radiator; and/or the presence of a gas in the gas,

a half wavelength mode of the loop antenna of the first sub-radiator; and/or the presence of a gas in the gas,

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 presence of a gas in the gas,

a three-half wavelength mode of a loop parasitic antenna of the second sub-radiator.

11. The co-body antenna of claim 1, wherein the third operating frequency band covers at least a portion of a GPS L5 frequency band, and the fourth operating frequency band covers at least a portion of a GPS L1 frequency band.

12. The collective antenna of claim 1, wherein the third operating band is an operating band of a composite right-hand and left-hand antenna mode produced by the second resonance of the second sub-radiator.

13. The co-body antenna of claim 1, wherein the fourth operating band is an operating band with an antenna mode generated by the second parasitic resonance of the first sub-radiator.

14. The co-body antenna according to any of claims 1-13, further comprising a radio frequency front end, wherein a tuning element is connected between the first feed point and/or the second feed point and the radio frequency front end, and wherein the radio frequency front end is connected to and provides radio frequency signals to the first feed point and the second feed point.

15. A co-body antenna according to claim 14, wherein said tuning element comprises a capacitive element connected between said second feed point and said rf front end.

16. A terminal device, characterized in that it comprises a co-body antenna according to any of claims 1-15.

17. The terminal device of claim 16, wherein the terminal device further comprises:

the radio frequency front end of the common antenna is arranged on the mainboard; and

and the middle frame is grounded, and the first grounding point and the second grounding point of the common antenna are both connected with the middle frame.

18. The terminal device of claim 16, wherein the middle frame includes a middle plate, the first and second sub-radiators are each enclosed around the middle plate, and a gap is provided between each of the first and second sub-radiators and the middle plate.

19. The terminal device of claim 18, wherein a gap between the first sub-radiator and the midplane provides headroom for the first sub-radiator and a gap between the second sub-radiator and the midplane provides headroom for the second sub-radiator.

20. The terminal device according to claim 18 or 19, wherein the middle frame further comprises a metal bezel, the metal bezel is disposed around the middle plate, and a part of the metal bezel is the radiator of the common antenna.