CN112736461A

CN112736461A - Antenna device and electronic apparatus

Info

Publication number: CN112736461A
Application number: CN202011580160.XA
Authority: CN
Inventors: 王泽东
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-30
Anticipated expiration: 2040-12-28
Also published as: CN112736461B

Abstract

The embodiment of the application provides an antenna device and electronic equipment, wherein the antenna device comprises a first radiator, a second radiator, a third radiator, a fourth radiator, a first feed source and a second feed source, a first coupling gap is formed between one end of the second radiator and the first radiator, and the other end of the second radiator is provided with a grounding end; one end of the third radiator is connected with the grounding end, and the other end of the third radiator extends towards the direction far away from the second radiator; a second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end of the fourth radiator extends towards the direction far away from the third radiator; the first feed source is coupled with the first radiating body, and the second radiating body generates a first resonance; the second feed is coupled to the third radiator, and at least a portion of the third radiator and the fourth radiator cooperate to generate a second resonance. Based on this, the first resonance and the second resonance can maintain better isolation and better radiation performance.

Description

Antenna device and electronic apparatus

Technical Field

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

Background

With the development of communication technology, electronic devices such as smart phones have more and more functions, and communication modes of the electronic devices are more diversified. It will be appreciated that each communication mode of the electronic device requires a respective antenna to support.

However, with the development of electronic technology, electronic devices are becoming smaller and thinner, the internal space of the electronic devices is becoming smaller, and the coupling between multiple antennas is becoming more severe. Therefore, how to improve the isolation between the antennas is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides an antenna device and an electronic device, wherein a plurality of radiators in the antenna device have good isolation.

In a first aspect, an embodiment of the present application provides an antenna apparatus, including:

a first radiator;

a first coupling gap is formed between one end of the second radiator and the first radiator, and the other end of the second radiator is provided with a grounding end;

the first feed source is coupled with the first radiating body and used for providing a first excitation signal so as to enable the second radiating body to generate a first resonance;

one end of the third radiator is connected with the grounding end, and the other end of the third radiator extends towards the direction far away from the second radiator;

a second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end of the fourth radiator extends towards a direction far away from the third radiator; and

a second feed coupled to the third radiator, the second feed configured to provide a second excitation signal, the second excitation signal coupled to the fourth radiator through the second coupling gap, so as to excite at least a portion of the third radiator and the fourth radiator to jointly generate a second resonance.

In a second aspect, an embodiment of the present application further provides an electronic device including the antenna apparatus as described above.

In the antenna device and the electronic device provided by the embodiment of the application, a first coupling gap is formed between a second radiator and a first radiator of the antenna device, and a grounding end is arranged at one end of the second radiator far away from the first coupling gap. One end of the third radiator is connected with the first grounding end, and the other end of the third radiator extends towards the direction far away from the second radiator. A second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end of the fourth radiator extends towards the direction far away from the third radiator. The first feed is coupled to the first radiator and provides a first excitation signal to cause the second radiator to produce a first resonance. The second feed is coupled to the third radiator, and a second excitation signal provided by the second feed can be coupled to the fourth radiator through the second coupling gap to excite at least a portion of the third radiator and the fourth radiator to jointly generate a second resonance. Therefore, in the antenna device according to the embodiment of the present application, the second radiator and the fourth radiator are used as main radiation portions of the first resonance and the second resonance, respectively, and even if the second radiator is adjacent to the third radiator, the first resonance and the second resonance may be separated by a distance equal to the length of the third radiator, and the first resonance and the second resonance may maintain good isolation and good radiation performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of a first structure of an antenna device according to an embodiment of the present application.

Fig. 2 is a first current diagram of the antenna device shown in fig. 1.

Fig. 3 is a second current diagram of the antenna device shown in fig. 1.

Fig. 4 is a schematic diagram of a second structure of an antenna apparatus according to an embodiment of the present application.

Fig. 5 is a first current diagram of the antenna device shown in fig. 4.

Fig. 6 is a second current diagram of the antenna device shown in fig. 4.

Fig. 7 is a graph showing reflection coefficient curves of the first resonance and the second resonance in the N41 frequency band.

Fig. 8 is a diagram illustrating the system efficiency curve of the first resonance in the N41 frequency band.

Fig. 9 is a diagram illustrating the system efficiency curve of the second resonance in the N41 frequency band.

Fig. 10 is a graph showing reflection coefficient curves of the fourth resonance and the fifth resonance in the N78 frequency band.

Fig. 11 is a diagram illustrating the system efficiency curve of the fifth resonance in the N78 frequency band.

Fig. 12 is a diagram illustrating the system efficiency curve of the fourth resonance in the N78 frequency band.

Fig. 13 is a schematic structural diagram of an electronic device according to an 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 fig. 1 to 13 in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The embodiment of the present application provides an antenna device and an electronic device, where the antenna device is used for implementing a Wireless communication function of the electronic device, for example, the antenna device may transmit a Wireless Fidelity (Wi-Fi) signal, a Global Positioning System (GPS) signal, a fourth Generation mobile communication technology (3th-Generation abbreviated as 3G), a third Generation mobile communication technology (4th-Generation abbreviated as 4G), a fifth Generation mobile communication technology (5th-Generation abbreviated as 5G), a Near Field Communication (NFC) signal, and the like.

Referring to fig. 1 and fig. 2, fig. 1 is a first structural schematic diagram of an antenna device according to an embodiment of the present application, and fig. 2 is a first current schematic diagram of the antenna device shown in fig. 1. The antenna device 100 includes a first radiator 110, a second radiator 120, a third radiator 130, a fourth radiator 140, a first feed 150, and a second feed 160.

The first radiator 110 and the second radiator 120 are disposed at an interval, a first coupling gap 101 is formed between one end of the second radiator 120 and the first radiator 110, a ground terminal is disposed at the other end of the second radiator 120 and grounded, a free end of the first radiator 110 is close to the first coupling gap 101, a free end of the second radiator 120 is also close to the first coupling gap 101, so that the free end of the first radiator 110 and the free end of the second radiator 120 are disposed opposite to each other at the first coupling gap 101, the first radiator 110 may be grounded at an end far from the first coupling gap 101, the second radiator 120 may be grounded at an end far from the first coupling gap 101, and thus the first radiator 110 and the second radiator 120 may form a one-port-to-one-port common-port antenna pair.

It is understood that the first radiator 110 may include a first ground terminal 111 and a first feeding terminal 112 which are spaced apart from each other. The first ground 111 may be an end of the first radiator 110 away from the first coupling gap 101, and the first feeding end 112 is closer to the first coupling gap 101 than the first ground 111. The first radiator 110 may be electrically connected to the antenna device 100 or the ground plane 200 of the electronic device through the first ground 111, so as to realize grounding of the first radiator 110.

The second radiator 120 may include a second ground terminal 121, and the second ground terminal 121 may be an end of the second radiator 120 away from the first coupling gap 101. The second radiator 120 may be electrically connected to the antenna device 100 or the ground plane 200 of the electronic device through the second ground terminal 121, so as to realize grounding of the second radiator 120.

One end of the third radiator 130 may be connected to the second radiator 120 at the second ground terminal 121, and the other end of the third radiator 130 may extend toward a direction away from the second radiator 120. The third radiator 130 and the second radiator 120 may be integrally formed (for example, the third radiator 130 and the second radiator 120 may form an inverted "L" shape in fig. 1), the second ground terminal 121 may be located between the third radiator 130 and the second radiator 120, and both the third radiator 130 and the second radiator 120 may be grounded through the second ground terminal 121.

It is understood that the third radiator 130 may be located at a side of the second radiator 120 facing away from the first radiator 110, that is, the second radiator 120 may be located between the first radiator 110 and the third radiator 130, so that the first radiator 110, the first coupling gap 101, the second radiator 120, and the third radiator 130 may be arranged in sequence.

The fourth radiator 140 and the third radiator 130 are disposed at an interval, a second coupling gap 102 may be formed between one end of the fourth radiator 140 and the third radiator 130, and the other end of the fourth radiator 140 may extend toward a direction away from the third radiator 130 and be grounded. The free end of the third radiator 130 is close to the second coupling gap 102, and the free end of the fourth radiator 140 is also close to the second coupling gap 102, so that the free end of the third radiator 130 and the free end of the fourth radiator 140 are oppositely disposed at the second coupling gap 102, and the fourth radiator 140 may be grounded at an end far from the second coupling gap 102, so that the third radiator 130 and the fourth radiator 140 may also form a port-to-port common aperture antenna pair.

It is understood that the fourth radiator 140 may be located at a side of the third radiator 130 facing away from the second radiator 120, that is, the third radiator 130 may be located between the second radiator 120 and the fourth radiator 140. At this time, the first radiator 110, the first coupling gap 101, the second radiator 120, the third radiator 130, the second coupling gap 102, and the fourth radiator 140 may be sequentially arranged.

It is understood that the third radiator 130 may have a second feeding terminal 131 disposed thereon, the second feeding terminal 131 may be disposed between the second ground terminal 121 and the second coupling gap 102, and the third radiator 130 may be electrically connected to the second feed 160 through the second feeding terminal 131. The third radiator 130 and the second radiator 120 may share the second ground terminal 121, and the second ground terminal 121 may increase the isolation between the third radiator 130 and the second radiator 120.

It is understood that a third ground 141 may be disposed on the fourth radiator 140, the third ground 141 may be disposed at an end of the fourth radiator 140 away from the second coupling gap 102, and the fourth radiator 140 may be electrically connected to the ground plane 200 of the antenna apparatus 100 or the electronic device through the third ground 141 to realize the grounding of the fourth radiator 140.

The first feed 150 may be coupled to the first radiator 110, for example, the first feed 150 may be electrically connected to the first radiator 110 through the first feeding end 112 of the first radiator 110. As shown in fig. 2, the first feed 150 may provide a first excitation signal I1 and may feed the first excitation signal I1 into the first radiator 110, and the second radiator 120 may generate a first resonance under the influence of the first excitation signal I1.

It is understood that the first driving signal I1 can return to the ground from the second ground terminal 121 of the second radiator 120.

The second feed 160 may be coupled to the third radiator 130, for example, the second feed 160 may be electrically connected to the third radiator 130 through the second feeding terminal 131 of the third radiator 130. As shown in fig. 2, the second feed 160 may provide a second excitation signal I2 and may feed a second excitation signal I2 into the third radiator 130, and the second excitation signal I2 is transmitted in the third radiator 130 and may be coupled into the fourth radiator 140 through the second coupling gap 102 to excite at least a portion of the third radiator 130 and the fourth radiator 140 to jointly generate a second resonance.

It is understood that the second excitation signal I2 may return to ground from the third ground 141 of the fourth radiator 140.

It is understood that the distance between the second feeding terminal 131 and the second coupling gap 102 may be smaller than the distance between the second feeding terminal 131 and the second ground terminal 121, so that a small portion of the third radiator 130 and the entire fourth radiator 140 generate a second resonance, which is mainly generated by the fourth radiator 140.

In the antenna device 100 according to the embodiment of the application, the first coupling gap 101 is formed between the second radiator 120 and the first radiator 110, and the second ground terminal 121 is disposed at an end of the second radiator 120 away from the first coupling gap 101. The third radiator 130 is connected to the second ground 121, and the second radiator 120 is located between the first radiator 110 and the third radiator 130. A second coupling gap 102 is formed between the fourth radiator 140 and the third radiator 130, and the third radiator 130 is located between the second radiator 120 and the fourth radiator 140. The first feed 150 is coupled to the first radiator 110, and the first feed 150 may provide a first excitation signal I1 to cause the second radiator 120 to generate a first resonance. The second feed 160 is coupled to the third radiator 130, and a second excitation signal I2 provided by the second feed 160 may be coupled to the fourth radiator 140 through the second coupling gap 102 to excite at least a portion of the third radiator 130 and the fourth radiator 140 to jointly generate a second resonance. Therefore, the antenna device 100 according to the embodiment of the present application has a compact structure among the plurality of radiators, and the space occupied by the radiators is small, so that the antenna device 100 can be miniaturized; meanwhile, the second radiator 120 and the fourth radiator 140 are used as main radiation parts of the first resonance and the second resonance, respectively, and even if the second radiator 120 is adjacent to the third radiator 130, the first resonance and the second resonance may be spaced apart by the length of the third radiator 130, and the first resonance and the second resonance may maintain good isolation and radiation performance.

The first resonance and the second resonance based on the embodiment of the present application have good isolation, and therefore, the resonant frequency range of the first resonance may be the same as the resonant frequency range of the second resonance, so that even if the antenna apparatus 100 transmits two wireless signals of the same frequency band, the isolation may also meet the communication requirement, and the first resonance and the second resonance may be multiple-in-multiple-out (MIMO, abbreviated as MIMO) transmission.

Of course, the resonant frequency range of the first resonance may be different from the resonant frequency range of the second resonance, the mutual coupling between the first resonance and the second resonance at different resonant frequencies is weaker, and the isolation between the first resonance and the second resonance is better.

Wherein the first resonance may be directly excited by the first excitation signal I1. For example, the first excitation signal I1 provided by the first feed 150 may be coupled to the second radiator 120 through the first coupling gap 101 so that portions of the first radiator 110 and the second radiator 120 may collectively produce a first resonance. Of course, the first resonance may also be generated indirectly by the first excitation signal I1. For example, please refer to fig. 3 in combination with fig. 2, and fig. 3 is a second current diagram of the antenna apparatus shown in fig. 1. The antenna device 100 may further include a first matching circuit M1 and a second matching circuit M2. It will be appreciated that the matching circuit may also be referred to as a matching network, a tuning circuit, a tuning network, etc.

A first matching circuit M1 may be coupled between the first feed 150 and the first radiator 110, e.g., a first matching circuit M1 is connected in series between the first feed 150 and the first feed end 112. The first matching circuit M1 may impedance match the first excitation signal I1 provided by the first feed 150.

One end of the second matching circuit M2 is coupled to the second radiator 120, and the other end of the second matching circuit M2 is grounded. The second matching circuit M2 may perform impedance matching on the excitation signal flowing through the second radiator 120.

It is understood that the first matching circuit M1 and the second matching circuit M2 may include a circuit formed by any series connection or any parallel connection of a capacitor, an inductor, and a resistor, and will not be described in detail herein.

It is understood that the antenna device 100 according to the embodiment of the present application may have a first Non-independent Networking (NSA) mode, as shown in fig. 3, in the first Non-independent networking mode, the first feed 150 may provide a first excitation signal I1, the first excitation signal I1 is fed to the first radiator 110 through the first feeding end 112 after the tuning action of the first matching circuit M1, and the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1. Meanwhile, the second radiator 120 may generate the aforementioned first resonance under the tuning action of the second matching circuit M2.

It is understood that the frequency range of the first resonance may be different from that of the third resonance, for example, the frequency range of the third resonance may be a B3 frequency band (1.71GHz to 1.88GHz), and the frequency range of the first resonance may be an N41 frequency band (2.5GHz to 2.69 GHz).

It can be understood that the third resonance generated by the first radiator 110 can return to the ground through the first ground 111 of the first radiator 110, the first resonance generated by the second radiator 120 can return to the ground through the second ground 121, and the second resonance generated by the third radiator 130 and the fourth radiator 140 can return to the ground through the third ground 141 of the fourth radiator 140, so that the return points of the first resonance, the second resonance, and the third resonance are far, and the isolation between the three resonances is good.

In the antenna device 100 according to the embodiment of the application, when the antenna device 100 is in the NSA mode and the first feed 150 provides the first excitation signal I1, the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1; the second radiator 120 may generate a first resonance under the tuning action of the second matching circuit M2, so that the first feed 150 feeds an excitation signal, the first radiator 110 and the second radiator 120 may generate two resonances, and the antenna device 100 may be miniaturized; meanwhile, the isolation between the first resonance/the third resonance and the second resonance is also good, so that the radiation performance of the antenna device 100 can be improved.

Referring to fig. 4 and 5, fig. 4 is a second structural schematic diagram of an antenna device according to an embodiment of the present application, and fig. 5 is a first current schematic diagram of the antenna device shown in fig. 4. The antenna arrangement 100 may further comprise a third feed 170.

The third feed 170 may be coupled with the fourth radiator 140. For example, the fourth radiator 140 may have a third feeding end 142 disposed thereon, the third feeding end 142 may be disposed between the second coupling gap 102 and the third ground 141, and the third feed 170 may be electrically connected to the fourth radiator 140 through the third feeding end 142.

As shown in fig. 4, the third feed 170 may provide a third excitation signal I3, the third excitation signal I3 being transmitted over the fourth radiator 140 and being coupleable to the third radiator 130 through the second coupling gap 102, so as to excite at least a portion of the fourth radiator 140 and at least a portion of the third radiator 130 to jointly generate a fourth resonance.

It is understood that the second resonance is generated by the third radiator 130 and the fourth radiator 140, and the fourth resonance is also generated by the third radiator 130 and the fourth radiator 140, so that the third radiator 130 and the fourth radiator 140 can be multiplexed, and the antenna device 100 can be miniaturized.

It is understood that the fourth radiator 140 and the third radiator 130 may generate the second resonance or the fourth resonance. The fourth radiator 140 and the third radiator 130 may also simultaneously generate the second resonance and the fourth resonance.

It is understood that the resonance frequency range of the second resonance may be different from the resonance frequency range of the fourth resonance, and the resonance frequency range of the second resonance may also be the same as the resonance frequency range of the fourth resonance.

In the antenna device 100 according to the embodiment of the application, since the second radiator 120 and the third radiator 130 are grounded through the second ground terminal 121, the second ground terminal 121 may increase the isolation between the fourth resonance and the resonance generated by the second radiator 120, so as to ensure the radiation performance of the antenna device 100.

It can be understood that the first resonance and the fourth resonance may form a MIMO transmission based on good isolation of the first resonance and the fourth resonance, and therefore, the resonant frequency range of the first resonance may be the same as the resonant frequency range of the fourth resonance, so that even if the antenna device 100 transmits two wireless signals of the same frequency band with isolation that may satisfy the communication requirement. Of course, the resonant frequency range of the first resonance may also be different from the resonant frequency range of the fourth resonance to increase the isolation between the two.

In order to further increase the isolation between the first resonance and the fourth resonance, referring to fig. 4 and 5 again, the antenna device 100 of the embodiment of the present application may further include a first filter circuit LC1, and the first filter circuit LC1 may also be referred to as a filter network.

The first filter circuit LC1 may include a first end a and a second end b, and the first end a may be coupled between the second feed 160 and the third radiator 130, for example, between the second feed 160 and the second feed 131. The second terminal b may be grounded, and the first filter circuit LC1 may be shorted to the third driving signal I3 to form a fourth resonance.

It is understood that the short circuit of the first filter circuit LC1 to the third driving signal I3 may mean that the resistance of the first filter circuit LC1 is infinitesimally small in the frequency band of the third driving signal I3, so that the third driving signal I3 is grounded. As shown in fig. 5, when the third feed 170 feeds the third excitation signal I3 to the fourth radiator 140, the third excitation signal I3 is coupled 102 to the third radiator 130 through the second coupling gap, and then may return to the ground through the first filter circuit LC 1.

It will be appreciated that first filter circuit LC1 may include a circuit made up of any series or any parallel connection of a capacitor, inductor, and resistor. And will not be described in detail herein.

The antenna module of the embodiment of the application is provided with the first filter circuit LC1, on one hand, the first filter circuit LC1 can prevent the third excitation signal I3 from returning to the ground from the second ground terminal 121 to avoid the current return point of I3 from being overlapped, so that the adjacent first resonance and fourth resonance also have good isolation, and the first resonance and the fourth resonance can have good radiation performance; on the other hand, the first end a of the first filter circuit LC1 is coupled between the second feed 160 and the third radiator 130, and the first filter circuit LC1 may also prevent the third excitation signal I3 from flowing into the second feed 160 to affect the performance of the second feed 160, so as to ensure the normal formation of the second resonance.

Fig. 6 is a second current schematic diagram of the antenna apparatus shown in fig. 4, with reference to fig. 4 and fig. 6, the antenna apparatus 100 is provided with a third feed 170. The antenna device 100 may further include a second filter circuit LC 2. The second filter circuit LC2 may also be a filter network.

One end of the second filter circuit LC2 may be electrically connected with the third feeding terminal 142 of the fourth radiator 140, the other end of the second filter circuit LC2 may be electrically connected with the third feed 170, and the second filter circuit LC2 is coupled between the third feed 170 and the fourth radiator 140. The second filter circuit LC2 may open circuit the second excitation signal I2 fed by the second feed 160 to form the aforementioned second resonance.

It is understood that the second filter circuit LC2 being open circuit to the second driving signal I2 may mean that at resonance of the second driving signal I2, the resistance of the second filter circuit LC2 is infinite to block the second driving signal I2 from flowing into the third feed 170.

It will be appreciated that the second filter circuit LC2 may comprise a circuit consisting of any series or any parallel connection of a capacitor, inductor, resistor. And will not be described in detail herein.

The antenna module of the embodiment of the application is provided with the second filter circuit LC2, and the second filter circuit LC2 opens the second excitation signal I2, on one hand, the second filter circuit LC2 can prevent the second excitation signal I2 from flowing into the third feed 170 to affect the performance of the third feed 170, so as to ensure the normal operation of the fourth resonance; on the other hand, after the second filter circuit LC2 blocks the second excitation signal I2, the second excitation signal I2 coupled to the fourth radiator 140 through the second coupling gap 102 may return to the ground from the third ground 141 at the farthest end, so that the isolation between the second resonance and the first resonance may be ensured.

When at least a portion of the fourth radiator 140 and at least a portion of the third radiator 130 jointly generate the fourth resonance, the antenna device 100 according to the embodiment of the present application may also have the second non-independent networking mode. Referring to fig. 5 again, in the second non-independent networking mode, when the first feed 150 provides the first excitation signal I1, the first excitation signal I1 is fed into the first radiator 110 through the first feeding end 112 after the tuning action of the first matching circuit M1, and the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1. Meanwhile, the second radiator 120 may generate a fifth resonance by the tuning action of the second matching circuit M2.

It is understood that the frequency range of the fifth resonance may be different from that of the third resonance, for example, when the frequency range of the third resonance is a B3 frequency band (1.71GHz to 1.88GHz), the frequency range of the fifth resonance may be an N78 frequency band (3.4GHz to 3.6 GHz).

It can be understood that, after the first excitation signal I1 is provided by the first feed 150, the second radiator 120 may generate the first resonance under the tuning action of the second matching circuit M2, and the second radiator 120 may generate the fifth resonance under the tuning action of the second matching circuit M2, so that the antenna device 100 of the embodiment of the present application may adapt to NSA modes of different frequency bands.

It is understood that the second matching circuit M2 may include at least two tuning branches, such as a first tuning branch and a second tuning branch, and when the second radiator 120 needs to generate the first resonance, the second matching circuit M2 may turn on the first tuning branch; when the second radiator 120 needs to generate the fifth resonance, the second matching circuit M2 may turn on the second tuning branch.

It will be appreciated that the frequency range of the fifth resonance may be the same as the frequency range of the fourth resonance, for example, the fifth resonance and the fourth resonance may both be the N78 frequency band (3.4GHz to 3.6 GHz).

In the antenna state of the embodiment of the present application, the third resonance generated by the first radiator 110 may return to the ground through the first ground terminal 111 of the first radiator 110, the fifth resonance generated by the second radiator 120 may return to the ground through the second ground terminal 121, and the fourth resonance generated by the fourth radiator 140 and the third radiator 130 together may return to the ground through the first filter circuit LC1, so that the return points of the third resonance, the fourth resonance, and the fifth resonance are far, and the isolation between the three resonances is good. At this time, even if the fourth resonance and the fifth resonance transmit the wireless signal of the same frequency band, the mutual interference between the two is small.

To further improve the performance of the antenna device 100, referring to fig. 4 again, the antenna device 100 may further include a third matching circuit M3 and a fourth matching circuit M4.

A third matching circuit M3 may be coupled between the third feed 170 and the fourth radiator 140, for example, a third matching circuit M3 is connected in series between the third feed 170 and the third feed end 142. The third matching circuit M3 may impedance match the third driving signal I3 provided by the third feed 170.

A fourth matching circuit M4 may be coupled between the second feed 160 and the third radiator 130. For example, the fourth matching circuit M4 is connected in series between the second feed 160 and the second feeding end 131. The fourth matching circuit M4 may impedance match the second excitation signal I2 provided by the second feed 160.

It is understood that the third matching circuit M3 and the fourth matching circuit M4 may include a circuit formed by any series connection or any parallel connection of a capacitor, an inductor, and a resistor, which will not be described in detail herein.

It is to be understood that the structures of at least one, two, three, and four of the first matching circuit M1, the second matching circuit M2, the third matching circuit M3, and the fourth matching circuit M4 may be different. The embodiment of the present application does not limit the structure of the matching circuit. The antenna device 100 according to the embodiment of the present application can form the first resonance, the second resonance, the third resonance, and the fourth resonance better by the matching circuit described above.

Based on the above-mentioned structure of the antenna device 100, the antenna device 100 of the embodiment of the present application can be applied to the non-independent networking state of different frequency bands of 5G. When in the NSA state, the antenna apparatus 100 is required to simultaneously operate in a Long Term Evolution (LTE) state and a New Radio Access Technology in 3GPP (NR) state based on an OFDM brand New air interface design. At this time, the first radiator 110 and the second radiator 120 may simultaneously operate in a combined state of a B3 band (1.71GHz to 1.88GHz) and an N41 band (2.5GHz to 2.69GHz) or a combined state of a B3 band and an N78 band (3.4GHz to 3.6 GHz). Meanwhile, based on the 5G communication standard, at least 4 antennas are required for the number of antennas operating in the N41 frequency band and the N78 frequency band. Therefore, the third radiator 130 and the fourth radiator 140 of the embodiment of the present application may operate in the N41 frequency band and the N78 frequency band to meet the communication requirement.

The following description will be made by taking the antenna device 100 in the combined state of the B3 band and the N41 band as an example:

as shown in fig. 3, when the first feed 150 feeds the first excitation signal I1 to the first feeding end 112, the first radiator 110 may generate a third resonance under the tuning effect of the first matching circuit M1, and the frequency band of the third resonance may be the B3 frequency band. The second radiator 120 may generate a first resonance under the tuning action of the second matching circuit M2, and the frequency band of the first resonance may be the N41 frequency band. At this time, the first radiator 110 and the second radiator 120 may operate in the B3 and N41 frequency bands. When the second feed 160 feeds the second excitation signal I2 to the third radiator 130, the third radiator 130 and the fourth radiator 140 may be coupled through the second coupling gap 102 and form a second resonance under the action of the second excitation signal I2, and the second excitation signal I2 may return to the ground from the third ground 141 of the fourth radiator 140. The frequency range of the second resonance may also be the N41 frequency band. At this time, the antenna device 100 can form one resonance (third resonance) of the B3 frequency band and two resonances (first resonance and second resonance) of the N41 frequency band.

Referring to fig. 7 to 9, fig. 7 is a graph illustrating reflection coefficient curves of the first resonance and the second resonance in the N41 frequency band; FIG. 8 is a graph illustrating the system efficiency curve of the first resonance in the N41 frequency band; fig. 9 is a diagram illustrating the system efficiency curve of the second resonance in the N41 frequency band. As shown in fig. 7, a curve S1 is a reflection coefficient curve of the first resonance in the N41 band, a curve S2 is a reflection coefficient curve of the second resonance in the N41 band, and a curve S3 is an isolation curve of the first resonance and the second resonance in the N41 band. Since the first resonance can return to the ground through the second ground terminal 121 and the second resonance can return to the ground through the third ground terminal 141, the distance between the first resonance and the second resonance is relatively long, as can be seen from fig. 7, the isolation between the resonances in the two N41 frequency bands is about-12.6 dB at best, and further, the isolation between the resonances in the two N41 frequency bands in the embodiment of the present application is relatively good.

As shown in fig. 8, a curve S4 is a radiation efficiency curve of the first resonance in the N41 band, and a curve S5 is a system efficiency curve of the first resonance in the N41 band. As can be seen from fig. 8, the system efficiency of the first resonance in the N41 frequency band is about-5.9 dB to-2.7 dB, and the radiation characteristic of the first resonance is better. As shown in fig. 9, a curve S6 is a radiation efficiency curve of the second resonance in the N41 frequency band, and a curve S7 is a system efficiency curve of the second resonance in the N41 frequency band. As can be seen from fig. 9, the system efficiency of the second resonance in the N41 frequency band is about-5.8 dB to-3.5 dB, and the radiation characteristic of the second resonance is better.

The following description will be made by taking the antenna device 100 in the combined state of the B3 band and the N78 band as an example:

as shown in fig. 5, when the first feed 150 feeds the first excitation signal I1 to the first feeding end 112, the first radiator 110 may generate a third resonance under the tuning effect of the first matching circuit M1, and the frequency band of the third resonance may be the B3 frequency band. The second radiator 120 may generate a fifth resonance under the tuning action of the second matching circuit M2, and the frequency band of the fifth resonance may be the N78 frequency band. At this time, the first radiator 110 and the second radiator 120 may operate in the B3 and N78 frequency bands. When the third feed 170 feeds the third excitation signal I3 to the fourth radiator 140, the fourth radiator 140 and the third radiator 130 may be coupled through the second coupling gap 102 by the third excitation signal I3 and form a fourth resonance, and the third excitation signal I3 may return to the ground from the first filter circuit LC1 connected to the third radiator 130. The frequency range of the fourth resonance may also be the N78 frequency band. At this time, the antenna device 100 can form a resonance of B3 frequency band (third resonance) and two resonances of N78 frequency band (fifth resonance and fourth resonance)

Referring to fig. 10 to 12, fig. 10 is a graph illustrating reflection coefficient curves of the fourth resonance and the fifth resonance in the N78 frequency band, fig. 11 is a graph illustrating system efficiency curves of the fifth resonance in the N78 frequency band, and fig. 12 is a graph illustrating system efficiency curves of the fourth resonance in the N78 frequency band. As shown in fig. 10, a curve S8 is a reflection coefficient curve of the fifth resonance in the N78 frequency band, a curve S9 is a reflection coefficient curve of the fourth resonance in the N78 frequency band, and a curve S10 is an isolation curve of the fifth resonance and the fourth resonance in the N78 frequency band. Since the fifth resonance can return to the ground through the second ground terminal 121, and the fourth resonance can return to the ground through the first filter circuit LC1, the distance between the current return points of the fifth resonance and the fourth resonance is relatively long, as can be seen from fig. 10, the worst isolation between the resonances in the two N78 frequency bands is about-11.5 dB, and further, the isolation between the resonances in the two N78 frequency bands in the embodiment of the present application is relatively good.

As shown in fig. 11, a curve S11 is a radiation efficiency curve of the fifth resonance in the N78 frequency band, and a curve S12 is a system efficiency curve of the fifth resonance in the N78 frequency band. As can be seen from fig. 11, the system efficiency of the fifth resonance in the N78 frequency band is about-3.5 dB to-3.4 dB, and the radiation characteristic of the resonance is better. As shown in fig. 12, a curve S13 is a radiation efficiency curve of the fourth resonance in the N78 frequency band, and a curve S14 is a system efficiency curve of the fourth resonance in the N78 frequency band. As can be seen from fig. 12, the system efficiency of the fourth resonance in the N78 frequency band is about-3.9 dB to-2.8 dB, and the radiation characteristic of the fourth resonance is better.

In the antenna device 100 according to the embodiment of the present application, under the condition that adjacent radiators operate in the same frequency band, different radiators are used for radiating, so that good isolation can be generated, and it can be ensured that the B3+ N41 states of the first radiator 110 and the second radiator 120 and the N41 states of the fourth radiator 140 and the third radiator 130 operate normally at the same time in the NSA state. In addition, the first filter circuit LC1 is equivalently short-circuited in the N78 frequency band, and becomes a current ground, so that the B3+ N78 states of the first radiator 110 and the second radiator 120 and the N78 states of the fourth radiator 140 and the third radiator 130 can be guaranteed to simultaneously and normally operate.

It should be understood that the above are only a few application embodiments of the antenna device 100 of the embodiment of the present application. The first resonances of the antenna device 100 of the embodiment of the present application can be combined arbitrarily according to the requirements, and are not limited to the above combination. For example, a combination of a third resonance with a second resonance, a combination of a third resonance with a fourth resonance, a combination of a third resonance, a first resonance, a second resonance, a fourth resonance, and so forth may be included. This is not limited in the embodiments of the present application.

It is understood that the frequency ranges of the first resonance, the second resonance, the third resonance, the fourth resonance, and the fifth resonance are not limited to the above examples, and may be any frequency range known at present, such as a 3G frequency band, a 4G frequency band, a 5G frequency band, a wifi frequency band, a gps frequency band, a bluetooth frequency band, and the like, which is not limited in this embodiment of the application.

Based on the structure of the antenna device 100, the embodiment of the present application further provides an electronic device. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an Augmented Reality (AR) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices. Referring to fig. 13, fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 10 may include a display screen 300, a middle frame 400, a circuit board 500, a battery 600, and a rear case 700, in addition to the antenna device 100 and the ground plane 200.

The display screen 300 is disposed on the middle frame 400 to form a display surface of the electronic device 10, and is used for displaying information such as images and texts. The Display screen 300 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

It is to be understood that the display 300 may be a full-screen, in which case the entire area of the display 300 is the display area and does not include the non-display area, or the non-display area on the display 300 occupies only a small area for the user, so that the display 300 has a large screen fraction. Alternatively, the display 300 may be a non-full screen, in which case the display 300 includes a display area and a non-display area adjacent to the display area. The display area is used for displaying information, and the non-display area does not display information.

It is understood that a cover plate may be further disposed on the display screen 300 to protect the display screen 300 and prevent the display screen 300 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that a user can observe contents displayed on the display screen 300 through the cover plate. It will be appreciated that the cover plate may be a glass cover plate of sapphire material.

The middle frame 400 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 400 is used to provide support for the electronic devices or functional components in the electronic device 10 to mount the electronic devices or functional components of the electronic device 10 together. For example, the middle frame 400 may be provided with a groove, a protrusion, a through hole, etc. to facilitate mounting of the electronic device or the functional components of the electronic apparatus 10. It is understood that the material of the middle frame 400 may include metal or plastic.

It is understood that, when the middle frame 400 includes a metal material, the first radiator 110, the second radiator 120, the third radiator 130, and the fourth radiator 140 may be a plurality of metal stubs on the middle frame 400. For example, the first coupling gap 101 and the second coupling gap 102 may be disposed on the middle frame 400 to form the first to fourth radiators. At this time, the middle frame 400 may be multiplexed into a radiator, and the space occupied by the radiator may be saved.

The circuit board 500 is disposed on the middle frame 400 to be fixed, and the circuit board 500 is sealed inside the electronic device 10 by the rear case 700. The circuit board 500 may be a main board of the electronic device 10. The circuit board 500 may have a processor integrated thereon, and may further have one or more of a headset interface, an acceleration sensor, a gyroscope, a motor, and other functional components integrated thereon. Meanwhile, the display screen 300 may be electrically connected to the circuit board 500 to control the display of the display screen 300 by a processor on the circuit board 500.

It is understood that one or more of the first feed 150, the second feed 160, the third feed 170, the first filter circuit LC1, the second filter circuit LC2, the third matching circuit M3, the second matching circuit M2, the first matching circuit M1, and the fourth matching circuit M4 of the antenna device 100 may be disposed on the circuit board 500. Of course, the above components may be provided on a small board of the electronic device 10, and are not limited herein.

It is understood that one or more of the first radiator 110, the second radiator 120, the third radiator 130 and the fourth radiator 140 may also be disposed on the circuit board 500, for example, formed on one side of the circuit board 500 by etching, spraying, etc. Of course, the radiator may be disposed on the support of the electronic device 10 so that the radiator is located inside the electronic device 10.

The battery 600 is disposed on the middle frame 400, and the battery 600 is sealed inside the electronic device 10 by the rear case 700. Meanwhile, the battery 600 is electrically connected to the circuit board 500 to enable the battery 600 to supply power to the electronic device. The circuit board 500 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by battery 600 to the various electronic devices in electronic apparatus 10.

The rear case 700 is coupled to the middle frame 400. For example, the rear case 700 may be attached to the middle frame 400 by an adhesive such as a double-sided tape to achieve connection with the middle frame 400. The rear case 700 is used to seal the electronic devices and functional components of the electronic device 10 inside the electronic device together with the middle frame 400 and the display screen 300, so as to protect the electronic devices and functional components of the electronic device 10.

It is to be understood that, in the description of the present application, terms such as "first", "second", and the like are used merely to distinguish similar objects and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The antenna device and the electronic device provided in the embodiments of the present application are described in detail above. The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna device, comprising:

a first radiator;

2. The antenna device according to claim 1, further comprising:

a first matching circuit coupled between the first feed and the first radiator; and

one end of the second matching circuit is coupled with the second radiator, and the other end of the second matching circuit is grounded; wherein the content of the first and second substances,

the antenna device has a first non-independent networking mode, and in the first non-independent networking mode, the first radiator generates a third resonance under the tuning action of the first matching circuit; meanwhile, the second radiator generates the first resonance under the tuning action of the second matching circuit.

3. The antenna device according to claim 1, characterized in that the frequency ranges of the first resonance and the second resonance are the same.

4. The antenna device of claim 2, further comprising:

a third feed coupled to the fourth radiator, the third feed configured to provide a third excitation signal, the third excitation signal coupled to the third radiator through the second coupling gap, so as to excite at least a portion of the fourth radiator and at least a portion of the third radiator to jointly generate a fourth resonance.

5. The antenna device of claim 4, further comprising:

a first filter circuit comprising a first end and a second end, the first end coupled between the second feed and the third radiator, the second end grounded, the first filter circuit configured to short circuit the third excitation signal to form the fourth resonance.

6. The antenna device of claim 4, further comprising:

a second filter circuit coupled between the third feed and the fourth radiator, the second filter circuit being open-circuited to the second excitation signal to form the second resonance.

7. The antenna device of claim 4, further comprising:

a third matching circuit coupled between the third feed and the fourth radiator, the third matching circuit to impedance match the third excitation signal.

8. The antenna device according to claim 4, wherein the antenna device has a second non-independent networking mode in which the first radiator generates the third resonance under the tuning action of the first matching circuit; meanwhile, the second radiator generates a fifth resonance under the tuning action of the second matching circuit; wherein the frequency ranges of the fifth resonance and the fourth resonance are the same.

9. The antenna device according to any one of claims 1 to 8, further comprising:

a fourth matching circuit coupled between the second feed and the third radiator, the fourth matching circuit configured to perform impedance matching on the second excitation signal.

10. An electronic device, characterized in that it comprises an antenna device according to any of claims 1 to 9.