WO2020135046A1

WO2020135046A1 - Antenna structure and communication terminal

Info

Publication number: WO2020135046A1
Application number: PCT/CN2019/124530
Authority: WO
Inventors: 陶延辉
Original assignee: 维沃移动通信有限公司
Priority date: 2018-12-29
Filing date: 2019-12-11
Publication date: 2020-07-02
Also published as: CN109687111B; CN109687111A

Abstract

The present disclosure provides an antenna structure and a communication terminal. The antenna structure comprises a first antenna radiator, a second antenna radiator, a matching network, a frequency selection network, and a signal source. The first antenna radiator and the second antenna radiator are coupled to each other via a gap. An end of the first antenna radiator away from the gap is grounded, and a feed point is provided at the first antenna radiator. An end of the second antenna radiator away from the gap is grounded. A first end of the matching network is connected to the feed point, and a second end of the matching network is connected to a first end of the signal source. A first end of the frequency selection network is connected to a first location at the second antenna radiator, and a second end of the frequency selection network is grounded. A second end of the signal source is grounded. The antenna structure is used to simultaneously generate first resonance, second resonance, third resonance, and fourth resonance.

Description

Antenna structure and communication terminal

Cross-reference of related applications

This application claims the priority of Chinese Patent Application No. 201811638282.2 filed in China on December 29, 2018, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular, to an antenna structure and a communication terminal.

Background technique

With the rapid development of terminal technology, communication terminals have become an indispensable tool in people's lives, and have brought great convenience to all aspects of users' lives. There are generally multiple antennas on communication terminals, especially the frequency band and number of 5G terminal antennas will increase in the future. However, in the related art, if more antennas or more frequency bands are to be realized, more breaks and complicated circuit structures need to be provided on the communication terminal to achieve more antenna coverage, resulting in a non-simple appearance of the communication terminal.

Summary of the invention

Embodiments of the present disclosure provide an antenna structure and a communication terminal to solve the increasingly demand for antennas and frequency bands of communication terminals. It is necessary to provide multiple breaks and a complicated circuit structure on the antenna to excite multiple resonances to achieve multiple antenna frequency bands Coverage, which causes the problem that the appearance of the communication terminal is not simple.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In a first aspect, an embodiment of the present disclosure provides an antenna structure, including: a first antenna radiator, a second antenna radiator, a matching network, a frequency selection network, and a signal source;

The first antenna radiator and the second antenna radiator are coupled through a gap, an end of the first antenna radiator away from the gap is grounded, and a feeding point is provided on the first antenna radiator The end of the second antenna radiator away from the slot is grounded;

The first end of the matching network is connected to the feeding point, and the second end of the matching network is connected to the first end of the signal source;

The first end of the frequency selection network is connected to the first position of the second antenna radiator, the second end of the frequency selection network is grounded, and the first position is located at the first position of the second antenna radiator And the second end of the second antenna radiator, the first end of the second antenna radiator is the end of the second antenna radiator near the slot, the second antenna radiator The second end is the grounded end of the second antenna radiator;

The second end of the signal source is grounded;

The antenna structure is used to generate a first resonance, a second resonance, a third resonance, and a fourth resonance at the same time.

In a second aspect, an embodiment of the present disclosure also provides a communication terminal, including the above antenna structure.

An antenna structure of an embodiment of the present disclosure includes: a first antenna radiator, a second antenna radiator, a matching network, a frequency selection network, and a signal source; one of the first antenna radiator and the second antenna radiator Coupling through a slot, the end of the first antenna radiator away from the slot is grounded, the first antenna radiator is provided with a feeding point, and the end of the second antenna radiator away from the slot is grounded; The first end of the matching network is connected to the feeding point, the second end of the matching network is connected to the first end of the signal source; the first end of the frequency selection network is radiated from the second antenna The first position of the body is connected, the second end of the frequency selection network is grounded, the first position is between the first end of the second antenna radiator and the second end of the second antenna radiator, The first end of the second antenna radiator is the end of the second antenna radiator close to the slot, and the second end of the second antenna radiator is the end of the second antenna radiator grounded; The second end of the signal source is grounded; the antenna structure is used to simultaneously generate a first resonance, a second resonance, a third resonance, and a fourth resonance. One slot can excite four resonances, which helps one slot to achieve more antenna frequency bands, and can reduce the number of slots, while improving the simplicity of appearance and the structural strength of the whole machine.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

1 is a structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

2 is a second structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

3 is a third structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

4 is a schematic diagram of an antenna standing wave ratio provided by an embodiment of the present disclosure;

FIG. 5 is a fourth structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 1, it includes a first antenna radiator 1, a second antenna radiator 2, a matching network 3, a frequency selection network 4, and a signal Source 5; the first antenna radiator 1 and the second antenna radiator 2 are coupled by a gap, the first antenna radiator 1 is grounded at an end away from the gap, and the first antenna radiator 1 A feed point 11 is provided on the end of the second antenna radiator 2 away from the slot; the first end of the matching network 3 is connected to the feed point 11 and the second end of the matching network 3 Is connected to the first end of the signal source 5; the first end of the frequency selection network 4 is connected to the first position 21 of the second antenna radiator 2, and the second end of the frequency selection network 4 is grounded , The first position 21 is located between the first end 22 of the second antenna radiator 2 and the second end 23 of the second antenna radiator 2, the first end of the second antenna radiator 2 22 is the end of the second antenna radiator 2 close to the slot, the second end 23 of the second antenna radiator 2 is the end of the second antenna radiator 2 grounded; The two ends are grounded; the antenna structure is used to generate a first resonance, a second resonance, a third resonance and a fourth resonance at the same time.

In this embodiment, the first antenna radiator 1 may also include a first end 12 and a second end 13, the first end 12 may be an end close to the slit, and the second end 13 may be grounded for the first antenna radiator 1 At the end. The first antenna radiator 1 may be a first antenna unit or a first antenna resonance arm; the second antenna radiator 2 may be a second antenna unit or a second antenna resonance arm.

In this embodiment, the antenna structure in FIG. 1 may be, but not limited to, mid-high frequency (1710MHz～2690MHz) and ultra-high frequency antenna architecture. The ultra-high frequency may include N78 (3300MHz～3800MHz) and N79 (4400MHz～5000MHz). Frequency band. The first antenna radiator 1 and the second antenna radiator 2 are metallic conductive materials, which may be common FPC, PDS and LDS materials. The first antenna radiator 1 and the second antenna radiator 2 may also be part of a metal middle frame or a metal back cover. The end of the first antenna radiator 1 away from the slot is grounded to form a first antenna unit; the end of the second antenna radiator 2 away from the slot is grounded to form a second antenna unit. The above-mentioned feeding point 11 is an access point of the signal source 5.

In this embodiment, the gap is located between the first antenna radiator 1 and the second antenna radiator 2. The gap may be air, or it may be filled with a non-conductive material, and a medium such as plastic is common. The gap between the first antenna radiator 1 and the second antenna radiator 2 is equivalent to a coupling capacitor Cp, the size of the coupling capacitor Cp is mainly the same as the first end 12 of the first antenna radiator 1 and the second antenna radiator 2 The area of the end face of the first end 22, the width of the slit, and the medium filled in the slit are related.

In this embodiment, the excitation process of the second antenna radiator 2 is as follows: the RF energy passes through the signal source 5 and the matching network 3 via the metal arm between the feeding point 11 of the first antenna radiator 1 and the first end 12 After one end 12, the RF energy is transferred to the second antenna radiator 2 through the slot (equivalent to the coupling capacitance Cp).

In this embodiment, the resonance frequency of the first resonance f1 may be an intermediate frequency, and the resonance frequency may be 1.7 GHz. The resonance frequency of the second resonance f2 may be a high frequency, and the resonance frequency may be 2.7 GHz. The resonance frequency of the third resonance f3 may be a frequency band of 5G N79, and the frequency band is 4400MHz-5000MHz. The resonance frequency of the fourth resonance f4 may be a frequency band of 5G N78, and the frequency band is 3300MHz-3800MHz.

In this embodiment, the first resonance f1 may be generated by grounding the first antenna radiator 1, and the resonance frequency of the first resonance f1 may be tuned by controlling the length of the first antenna radiator 1. The second resonance f2 is generated by the ground excitation of the second antenna radiator 2, and the resonance frequency of the second resonance f2 can be tuned by changing the length of the second antenna radiator 2. It should be noted that since the first resonance f1 and the second resonance f2 are mainly related to the length of the antenna radiator, controlling the length of the corresponding ground arm, or further combining with the matching network 3 to adjust, the first resonance f1 can also be controlled by the second antenna The radiator 2 is grounded. Similarly, the second resonance f2 can also be generated by the first antenna radiator 1 grounded. Furthermore, controlling the length of the corresponding ground arm, or further adjusting it in conjunction with the matching network 3, will not have a large impact on the other two resonances (third resonance f3 and fourth resonance f4).

The third resonance f3 is generated by the ground excitation of the first antenna radiator 1, and the third resonance f3 is also related to the position of the feeding point 11. Changing the length of the first antenna radiator 1 alone does not produce a large effect on the third resonance f3 Impact. The fourth resonance f4 is generated by the metal arm between the first position 21 and the first end 22 of the second antenna radiator 2 and the frequency selection network 4 added at the first position 21, and changes the The length will not have a great influence on the fourth resonance f4.

In this embodiment, the third resonance f3 is generated by the ground excitation of the first antenna radiator 1. The electric field at the frequency of the third resonance f3 has a three-quarter wavelength distribution on the first antenna radiator 1. The feed point 11 and the third The resonance electric field of the third resonance f3 of the two-terminal 23 is weak and close to zero. The gap and the electric field in the middle of the feeding point 11 and the second end 13 are strong field regions. In this embodiment, the length between the feeding point 11 and the first end 12 may be smaller than the length between the feeding point 11 and the second end 13, this layout is generally recommended, and each resonance mode is relatively clear, and no special Complex matching optimization. Tuning the resonance frequency of the third resonance f3 can be achieved by controlling the length of the first antenna radiator 1 and the position of the feeding point 11. Because the metal body between the feeding point 11 and the first end 12 of the first antenna radiator 1 also affects the third resonance f3, when the position of the feeding point 11 changes, the feeding point 11 and the first antenna radiator The length of the metal body between the first ends 12 of 1 will also change, which will affect the resonance frequency of the third resonance f3. Therefore, tuning the resonance frequency of the third resonance f3 can be achieved by controlling the length of the first antenna radiator 1 and the position of the feeding point 11. The fourth resonance f4 is excited by the metal arm between the first position 21 and the first end 22 of the second antenna radiator 2 and the frequency selection network 4 added at the first position 21.

In this embodiment, a slot can be fully used to simultaneously excite four resonances on a communication terminal (such as a 5G communication terminal) to achieve but is not limited to the 4G IF, high frequency, 5G N78 and 5G N79 of the four different functional frequency bands in the example Antenna combination, and 4G, 5G can exist at the same time. Realize the hardware requirements while reducing the total number of antennas and slots of the whole machine. Compared with four separate antennas, it saves multiple feeder networks (including RF feeders, test sockets, matching networks, and feeder shrapnel structures, etc.) The occupied structural space, and the reduction in the number of gaps also help to improve the structural strength and meet the overall product needs of simple appearance. Moreover, covering multiple frequency bands without using adjustable originals such as switches also contributes to cost savings.

Optionally, the first resonance is generated by the first antenna radiator 1; the second resonance is generated by the second antenna radiator 2; the third resonance is radiated by the first antenna The body 1 is excited and the position of the feed point 11 affects the third resonance; the fourth resonance is caused by the difference between the first end 22 of the second antenna radiator 2 and the first position 21 The metal arm and the frequency selection network 4 are excitedly generated.

In this embodiment, the first resonance is generated by the first antenna radiator 1; the second resonance is generated by the second antenna radiator 2; and the third resonance is generated by the first antenna The radiator 1 is excited, and the position of the feed point 11 affects the third resonance; the fourth resonance is between the first end 22 of the second antenna radiator 2 and the first position 21 The metal arm and the frequency selection network 4 are excitedly generated. In this way, a slot can generate four resonances, improving the structural strength of the antenna structure.

Optionally, the resonance frequency of the first resonance is less than the resonance frequency of the second resonance, the resonance frequency of the second resonance is less than the resonance frequency of the fourth resonance, and the resonance frequency of the fourth resonance is less than The resonance frequency of the third resonance.

In this embodiment, the resonance frequency of the first resonance is less than the resonance frequency of the second resonance, the resonance frequency of the second resonance is less than the resonance frequency of the fourth resonance, and the resonance frequency of the fourth resonance is less than The resonance frequency of the third resonance.

Optionally, the frequency selection network 4 includes a first inductor L1 and a first capacitor C1;

The first end of the first inductor L1 is connected to the first position 21, and the second end of the first inductor L1 is connected to the first end of the first capacitor C1;

The second terminal of the first capacitor C1 is grounded.

In order to better understand the above setting method, please refer to FIG. 2, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 2, the first end of the first inductor L1 is connected to the first position 21, and the second end of the first inductor L1 is connected to the first end of the first capacitor C1; The second terminal of the first capacitor C1 is grounded.

In this embodiment, the second resonance f2 and the fourth resonance f4 may combine the length of the second antenna radiator 2, the length between the first position 21 and the first end 22, and the first inductance L1 and the first The value of a capacitor C1 is used for comprehensive tuning.

Optionally, the frequency selection network 4 further includes a second inductor L2, and the second inductor L2 is connected in parallel with the first capacitor C1.

In order to better understand the above setting method, please refer to FIG. 3, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 3, the second inductor L2 is connected in parallel with the first capacitor C1.

In this embodiment, if the frequency selection network 4 only has the first inductance L1 and the first capacitor C1, which is equivalent to the second antenna radiator 2 being grounded through a capacitor, part of the resonance frequency band excited by the second antenna radiator 2 may be sacrificed performance. In this way, the second inductance L2 and the first capacitor C1 are connected in parallel and then in series with the first inductance L1, which is equivalent to the second antenna radiator 2 is grounded through a large inductance, which can reduce the addition of the frequency selection network to the second antenna radiator 2 The frequency deviation of the excited resonance, thereby improving the radiation performance of the antenna. Of course, the frequency selection network 4 may be a mutually different two-port network. Both ends of the frequency selection network 4 may be connected to the first location 21 and the ground respectively, or to the ground and the first location 21 respectively, and the effect is equivalent.

In this embodiment, the length between the first position 21 and the first end 22 of the second antenna radiator 2 corresponds to the natural resonance length of N78. The frequency selection network 4 is ideally equivalent to zero ohms for the N78 frequency band. The second antenna The metal arm between the first position 21 and the first end 22 of the radiator 2 is equivalent to zero-ohm grounding at the first position 21, and a second parasitic antenna is formed between the first end 22 and the ground point of the frequency selection network 4 The resonance generated by the excitation is the fourth resonance f4. In actual application, the access of the frequency selection network 4 is equivalent to an impedance tuning function, which can be equivalent to an inductance, capacitance, or zero ohms, and plays the role of electrical length tuning. It can be adjusted according to the length between the first position 21 and the first end 22 of the second antenna radiator 2. In order to minimize the influence of the access of the frequency selection network 4 on the second resonance f2 generated by the first parasitic antenna formed by the second antenna radiator 2, the frequency selection network 4 may satisfy the following characteristics:

For the N78 frequency band close to the band-pass characteristic, the out-of-band frequency point, especially the frequency point near the resonance frequency band of the second resonance f2, needs to be equivalent to a larger inductance, such as 10 nh or more. Minimize the effect of the access of the frequency selection network 4 on the aperture tuning of the second resonance f2. The smaller the equivalent inductance, the greater the influence on the second resonance f2, and the smaller the opposite effect. Of course, in actual engineering applications, these are not absolutely immutable. The second resonance f2 and the fourth resonance f4 can be combined to adjust the length of the second antenna radiator 2, the length between the first position 21 and the first end 22, and the first inductance L1, the first capacitor C1 and the The value of the second inductance L2 is comprehensively tuned.

In this way, four antenna resonances are simultaneously excited by sharing one antenna slot without a switch, such as the combination of LTE and sub-6G functional antennas of mid-high frequency and sub-6G (including N78 and N79) as described in this embodiment, It is beneficial to the purpose of reducing layout space, reducing the number of gaps, improving structural strength and improving appearance. The corresponding standing wave ratio can refer to FIG. 4, which is a schematic diagram of an antenna standing wave ratio provided by an embodiment of the present disclosure.

As shown in FIG. 4, the first resonance f1 is the intermediate frequency (1.7 GHz) resonance excited by the first antenna radiator 1; the second resonance f2 is the high frequency (2.7 GHz) resonance excited by the second antenna radiator 2; the third resonance f3 is the resonance 5G N79 excited by the first antenna radiator 1; the fourth resonance f4 is the resonance 5G N78 excited by the metal arm between the first position 21 and the first end 22 of the second antenna radiator 2.

Optionally, the antenna structure further includes an antenna tuning circuit 6;

The first end of the antenna tuning circuit 6 is connected to the second position 14 of the first antenna radiator 1, the second end of the antenna tuning circuit 6 is grounded, and the second position 14 is located at the feeding point 11 and the grounded end of the first antenna radiator 1.

In order to better understand the above setting method, please refer to FIG. 5, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 5, the first end of the antenna tuning circuit 6 is connected to the second position 14 of the first antenna radiator 1, the second end of the antenna tuning circuit 6 is grounded, and the second position 14 It is located between the feeding point 11 and the grounded end of the first antenna radiator 1, that is, the second position 14 is located between the feeding point 11 and the second end 13.

In this embodiment, the communication terminal may have a poor environment in practical applications (such as a full screen and narrow headroom), and in this case, the antenna bandwidth is difficult to cover more frequency bands. In order to continue to improve the bandwidth, the first An antenna tuning circuit 6 is added between the feeding point 11 of the antenna radiator 1 and the second end 13, so that the first resonance f1 excited by the first antenna radiator 1 in the 4G LTE band can be aperture-tuned to optimize the overall high Bandwidth purpose.

Optionally, the antenna tuning circuit 6 includes an antenna switch or an adjustable capacitor.

In this embodiment, the antenna tuning circuit 6 may be an antenna switch or an adjustable capacitor. If it is an antenna switch, it is necessary to add a corresponding lumped element inductance, capacitance or a combination of inductance and capacitance for tuning on each RF branch of the switch.

Optionally, the length between the feeding point 11 and the first end 12 of the first antenna radiator 1 is smaller than the feeding point 11 and the second end 13 of the first antenna radiator 1 The length between them, the first end 12 of the first antenna radiator 1 is the end of the first antenna radiator 1 close to the slot, and the second end 13 of the first antenna radiator 1 is the The grounded end of the first antenna radiator 1.

In this embodiment, the length between the feeding point 11 and the first end 12 of the first antenna radiator 1 is greater than the second length between the feeding point 11 and the first antenna radiator 1 In the case of the length between the ends 13, the third resonance f3 can also be excited. However, at this time, the mode corresponding to the third resonance f3 will change, and it is necessary to adjust and optimize the position of the feeding point 11 and the matching network 3 to comprehensively optimize. This tuning is generally for the other three resonances (first resonance f1 , The second resonance f2 and the fourth resonance f4) will be somewhat affected, and adjustment will be more complicated.

In this way, the length between the feeding point 11 and the first end 12 of the first antenna radiator 1 is smaller than the length between the feeding point 11 and the second end 13 of the first antenna radiator 1 The length between them can reduce the influence on the first resonance f1, the second resonance f2 and the fourth resonance f4, and simplify the adjustment process.

Optionally, the gap is filled with a non-conductive material.

In this embodiment, the gap is filled with a non-conductive material, which can increase the structural strength of the antenna structure and also make the antenna structure more beautiful.

Optionally, the antenna structure is part of the metal middle frame of the communication terminal or part of the metal back cover of the communication terminal.

In this embodiment, the antenna structure is a part of the metal middle frame of the communication terminal or a part of the metal back cover of the communication terminal, which can be selected according to actual conditions, so as to satisfy a suitable installation mode. The material of the above antenna structure may be common materials such as FPC, PDS or LDS.

Optionally, the resonance bandwidth of the antenna structure includes a frequency band of 1710MHz-2690MHz, a frequency band of 3300MHz-3800MHz, and a frequency band of 4400MHz-5000MHz.

In this embodiment, the resonant bandwidth of the antenna structure includes but is not limited to the frequency band of 1710MHz-2690MHz, the frequency band of 3300MHz-3800MHz and the frequency band of 4400MHz-5000MHz. For example, GPS L5 (1.2GHz) can also be implemented in a similar way to achieve coverage Multiple frequency bands reduce the number of broken seams, while improving the simplicity of appearance and making the antenna structure more adaptable.

An antenna structure of an embodiment of the present disclosure includes a first antenna radiator 1, a second antenna radiator 2, a matching network 3, a frequency selection network 4, and a signal source 5; the first antenna radiator 1 and the first The two antenna radiators 2 are coupled through a slot, the first antenna radiator 1 is grounded at an end away from the slot, the first antenna radiator 1 is provided with a feeding point 11, and the second antenna radiator 2 The end away from the gap is grounded; the first end of the matching network 3 is connected to the feeding point 11, and the second end of the matching network 3 is connected to the first end of the signal source 5; The first end of the frequency selection network 4 is connected to the first position 21 of the second antenna radiator 2, the second end of the frequency selection network 4 is grounded, and the first position 21 is located at the second antenna radiator 2 between the first end 22 and the second end 23 of the second antenna radiator 2, the first end 22 of the second antenna radiator 2 is the second antenna radiator 2 near the gap At one end, the second end 23 of the second antenna radiator 2 is the end at which the second antenna radiator 2 is grounded; the second end of the signal source 5 is grounded; the antenna structure is used to simultaneously generate a first resonance , Second resonance, third resonance and fourth resonance.

In this way, the appearance of the metal middle frame and the like can be fully utilized without the use of switches. A radiating slot of the communication terminal simultaneously excites four resonance modes, which can simultaneously realize the functional combination of four antenna resonance frequency bands on one antenna structure. Realized the coexistence requirement of 4G LTE and 5G NR antenna. For example, the "medium and high frequency and sub-6G (including 5G N78 and 5G N79)" antennas of sub6-G communication terminals (communication terminals below 6 GHz), the resonance bandwidth covers the frequency bands of 1710MHz~2690MHz, 3300MHz~3800MHz and 4400MHz~5000MHz. Satisfying the design requirements of the antenna while reducing the total number of antennas and slots, is conducive to cost savings and reduces the structural space occupied by the total feeder network (including RF feeders, test sockets, matching networks and feeder shrapnel structures, etc.) The reduction in the number of gaps also helps to improve the structural strength and meet the overall product demand for a simple appearance.

An embodiment of the present disclosure also provides a communication terminal, including the above antenna structure.

In this embodiment, the communication terminal may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant (PDA)), a mobile Internet device (Mobile Internet Device (MID)) Or wearable device (Wearable Device) and so on.

It should be noted that in this article, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, It also includes other elements that are not explicitly listed, or include elements inherent to this process, method, article, or device. Without more restrictions, the element defined by the sentence "include one..." does not exclude that there are other identical elements in the process, method, article or device that includes the element.

The embodiments of the present disclosure have been described above with reference to the drawings, but the present disclosure is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only schematic, not limiting, and those of ordinary skill in the art Under the inspiration of the present disclosure, many forms can be made without departing from the purpose of the present disclosure and the scope protected by the claims, all of which fall within the protection of the present disclosure.

Claims

An antenna structure, including: a first antenna radiator, a second antenna radiator, a matching network, a frequency selection network and a signal source;

The first antenna radiator and the second antenna radiator are coupled through a gap, an end of the first antenna radiator away from the gap is grounded, and a feeding point is provided on the first antenna radiator The end of the second antenna radiator away from the slot is grounded;

The first end of the matching network is connected to the feeding point, and the second end of the matching network is connected to the first end of the signal source;

The first end of the frequency selection network is connected to the first position of the second antenna radiator, the second end of the frequency selection network is grounded, and the first position is located at the first position of the second antenna radiator And the second end of the second antenna radiator, the first end of the second antenna radiator is the end of the second antenna radiator near the slot, the second antenna radiator The second end is the grounded end of the second antenna radiator;

The second end of the signal source is grounded;

The antenna structure is used to generate a first resonance, a second resonance, a third resonance, and a fourth resonance at the same time.
The antenna structure according to claim 1, wherein the first resonance is generated by excitation of the first antenna radiator; the second resonance is generated by excitation of the second antenna radiator; and the third resonance is generated by The first antenna radiator is excited and the position of the feed point affects the third resonance; the fourth resonance is between the first end of the second antenna radiator and the first position The metal arm and the frequency selection network excitation are generated.
The antenna structure according to claim 2, wherein the resonance frequency of the first resonance is less than the resonance frequency of the second resonance, the resonance frequency of the second resonance is less than the resonance frequency of the fourth resonance, the The resonance frequency of the fourth resonance is smaller than the resonance frequency of the third resonance.
The antenna structure according to claim 1, wherein the frequency selection network includes a first inductor and a first capacitor;

The first end of the first inductor is connected to the first position, and the second end of the first inductor is connected to the first end of the first capacitor;

The second end of the first capacitor is grounded.
The antenna structure according to claim 4, wherein the frequency selection network further includes a second inductance, the second inductance being in parallel with the first capacitor.
The antenna structure according to any one of claims 1 to 5, further comprising an antenna tuning circuit;

The first end of the antenna tuning circuit is connected to the second position of the first antenna radiator, the second end of the antenna tuning circuit is grounded, and the second position is located at the feeding point and the first Between the grounded end of the antenna radiator.
The antenna structure according to claim 6, wherein the antenna tuning circuit includes an antenna switch or an adjustable capacitor.
The antenna structure according to claim 6, wherein the length between the feeding point and the first end of the first antenna radiator is smaller than the length between the feeding point and the first antenna radiator The length between the two ends, the first end of the first antenna radiator is the end of the first antenna radiator close to the slot, and the second end of the first antenna radiator is the first antenna The grounded end of the radiator.
The antenna structure according to any one of claims 1 to 5, wherein the slit is filled with a non-conductive material.
The antenna structure according to any one of claims 1 to 5, wherein the antenna structure is a part of the metal middle frame of the communication terminal or a part of the metal back cover of the communication terminal.
The antenna structure according to any one of claims 1 to 5, wherein the resonance bandwidth of the antenna structure includes a frequency band of 1710 MHz to 2690 MHz, a frequency band of 3300 MHz to 3800 MHz, and a frequency band of 4400 MHz to 5000 MHz.
A communication terminal including the antenna structure according to any one of claims 1 to 11.