CN216698739U

CN216698739U - Antenna structure and terminal equipment

Info

Publication number: CN216698739U
Application number: CN202123359985.1U
Authority: CN
Inventors: 黄正琛; 王志刚
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-06-07
Anticipated expiration: 2031-12-27

Abstract

The present disclosure relates to an antenna structure and a terminal device, the antenna structure including: a first antenna assembly and a first feed; wherein the first antenna assembly comprises: the first feed source, the first radiator and the second radiator are positioned in the same connecting passage; a second antenna assembly and a second feed; wherein the second antenna assembly comprises: a third radiator; an antenna gap is formed between the third radiator and the first radiator; the second feed source is connected with the third radiator; the first radiator radiates a first radio frequency signal of a first frequency band, and the second radiator is coupled with the first radiator and radiates a second radio frequency signal of a second frequency band; the third radiator radiates a third radio frequency signal of a third frequency band; the first frequency band and the second frequency band are at least partially different.

Description

Antenna structure and terminal equipment

Technical Field

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

Background

With the rapid development of communication technology and terminal technology, electronic devices with communication functions, such as mobile phones, have higher popularity, and users have higher demands for network transmission speed of the electronic devices.

With the increase of wireless transmission capability and the decrease of delay, the operating bandwidth required to be covered by the antenna configured in the electronic device is also greatly increased, which puts higher requirements on the design of the antenna scheme. In the related art, the operating bandwidth of an antenna configured in an electronic device cannot meet requirements, and the sideband efficiency is poor.

Disclosure of Invention

The present disclosure provides an antenna structure and a terminal device.

In a first aspect, an antenna structure provided in an embodiment of the present disclosure includes:

a first antenna component and a first feed; wherein the first antenna assembly comprises: the first feed source, the first radiator and the second radiator are positioned on the same connecting passage;

a second antenna assembly and a second feed; wherein the second antenna assembly comprises: a third radiator; an antenna gap is formed between the third radiator and the first radiator; the second feed source is connected with the third radiator;

the first radiator radiates a first radio frequency signal of a first frequency band, and the second radiator is coupled with the first radiator and radiates a second radio frequency signal of a second frequency band; the third radiator radiates a third radio frequency signal of a third frequency band; the first frequency band and the second frequency band are at least partially different.

Optionally, the first antenna assembly comprises:

the first feed source is positioned on the first radiating body and electrically connected with the first radiating body through the first feed point;

the second feeding point is positioned on the second radiator and is electrically connected with the first feeding point;

the first feed source is electrically connected with the second radiator through the first feed point and the second feed point.

Optionally, the antenna structure includes:

the circuit board comprises the first feed source and the second feed source;

the first feed source is connected with a first feed point of the first radiator and a second feed point of the second radiator; the second feed source is connected with a third feed point of the third radiator;

the first radiator and the third radiator are positioned on the same side of the circuit board; the first radiator and the second radiator are positioned on different sides of the circuit board; the surface of the circuit board facing the first radiator is provided with a through hole; the through hole is used for electrically connecting the first feeding point and the second feeding point.

Optionally, the antenna structure includes:

a first matching circuit; the first feed source is connected with the first feed point of the first radiator through the first matching circuit;

the first matching circuit includes at least:

a first capacitor and a first inductor;

a first end of the first capacitor is connected with the first feed source, and a second end of the first capacitor is connected with the first feed point;

the first end of the first inductor is connected with the second end of the first capacitor, and the second end of the first inductor is grounded.

Optionally, the antenna structure includes:

a second matching circuit; the second feed source is connected with a third feed point of the third radiator through the second matching circuit;

the second matching circuit includes at least:

and a first end of the second capacitor is connected between the second feed source and the third feed point, and a second end of the second capacitor is grounded.

Optionally, the antenna structure includes:

a first end of the adjusting circuit is connected with the second feeding point of the second radiator, and a second end of the adjusting circuit is connected with the first feeding point of the first radiator;

the adjusting circuit is used for adjusting the frequency band range of the second radio-frequency signal radiated by the second radiator.

Optionally, the adjustment circuit comprises:

a third capacitance connected in series between the second feed point and the first feed point;

the capacitance value of the third capacitor is inversely related to the frequency value of the second radio frequency signal radiated by the second radiator.

Optionally, the first radiator and the third radiator are in an inverted F shape.

Optionally, the second radiator is a radiator manufactured by a laser direct injection molding process.

In a second aspect, a terminal device provided in an embodiment of the present disclosure includes:

the antenna structure provided by the first aspect of the embodiments of the present disclosure;

a metal middle frame for forming the first radiator, the third radiator, and the antenna slot;

the antenna bracket is arranged on the circuit board, and the second radiator is formed on the antenna bracket.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the antenna structure provided by the embodiment of the disclosure comprises a first antenna component and a second antenna component, wherein the first antenna component and the second antenna component are respectively connected with a first feed source and a second feed source, so that the antenna structure can generate radio frequency signals in two different frequency band ranges, and the bandwidth characteristic of the antenna structure is improved;

and, because the first antenna component is internally provided with the first radiator and the second radiator, the first radiator generates a first radio frequency signal of a first frequency band under the excitation of the first feed source, and the second radiator is coupled with the first radiator under the excitation of the first feed source to generate a new resonance mode and radiate a second radio frequency signal of a second frequency band, on one hand, the bandwidth of the radio frequency signal radiated by the first antenna component can be effectively widened, and on the other hand, the radiation efficiency of the radio frequency signal radiated by the first antenna component can be improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram illustrating an antenna structure in the related art.

Fig. 2 is a schematic diagram illustrating an antenna structure according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating a structure in which a first feeding point and a second feeding point are connected according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a first antenna assembly according to an example embodiment.

Fig. 5 is a circuit schematic diagram illustrating a matching circuit of a first antenna assembly in accordance with an exemplary embodiment.

Fig. 6 is a circuit schematic diagram illustrating a matching circuit for a second antenna assembly in accordance with an exemplary embodiment.

Fig. 7 is a circuit schematic diagram illustrating a matching circuit of an antenna structure according to an exemplary embodiment.

Fig. 8 is a schematic diagram illustrating a current pattern of an antenna structure according to an exemplary embodiment.

Fig. 9 is a diagram illustrating a comparison of Smith circles for two antenna structures in accordance with an exemplary embodiment.

Fig. 10 is a schematic diagram illustrating a comparison of S-parameter curves for two antenna structures in accordance with an exemplary embodiment.

Fig. 11 is a schematic diagram illustrating a comparison of radiation efficiency of two antenna structures in accordance with an exemplary embodiment.

Fig. 12 is a block diagram illustrating a terminal device according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

With the increase of wireless transmission capability and the reduction of delay, the working bandwidth required to be covered by an Antenna configured in an electronic device is also greatly increased, and in order to meet the requirement of the Antenna on the working frequency band of WIFI 6E (i.e., 2.4GHz, 5GHz, and 6GHz frequency bands), an Antenna structure in the form of an Inverted-F Antenna (IFA) with a frame is generally adopted in the related art, so that the required working frequency band is covered by using a fundamental mode and a higher order mode of the Antenna. As shown in fig. 1, fig. 1 is a schematic structural diagram illustrating an antenna structure in the related art.

Wherein, the antenna structure includes: a WIFI antenna radiator and an LB + B32 antenna radiator; the 1/4 wavelength mode of the LB + B32 antenna radiator is used for achieving receiving and sending of 2.4GHz frequency band signals, and the high-order mode of the WIFI antenna radiator is combined with the high-order mode of the LB + B32 antenna radiator to achieve receiving and sending of 5GHz and 6GHz frequency band signals. However, the scheme has narrow high-frequency bandwidth, is difficult to completely cover the 5150-5850/5925-7125MHz band, and has poor sideband efficiency.

Based on this, the present disclosure provides an antenna structure, and fig. 2 is a schematic structural diagram of an antenna structure according to an exemplary embodiment. As shown in fig. 2, the antenna structure 10 includes:

a first antenna assembly 11 and a first feed 13; wherein the first antenna assembly 11 comprises: the first feed source 13 is located in the same connection path as the first radiator 111 and the second radiator 112;

a second antenna assembly 12 and a second feed 14; wherein the second antenna assembly 12 comprises: a third radiator 121; an antenna slot is formed between the third radiator 121 and the first radiator 111; the second feed 14 is connected to the third radiator 121;

the first radiator 111 radiates a first radio frequency signal of a first frequency band, and the second radiator 112 is coupled with the first radiator 111 and radiates a second radio frequency signal of a second frequency band; the third radiator 121 radiates a third radio frequency signal of a third frequency band; the first frequency band and the second frequency band are at least partially different.

It should be noted that the antenna structure provided in the embodiments of the present disclosure may be configured in a terminal device, and the antenna structure is used for radiating and/or receiving a radio frequency signal, so as to implement a communication function of the terminal device. Here, the terminal device may be a mobile terminal or a wearable electronic device, the mobile terminal includes a mobile phone, a notebook, and a tablet computer, and the wearable electronic device includes a smart watch, and the embodiments of the present disclosure are not limited thereto.

The antenna structure may include a first antenna component and a second antenna component, where the first antenna component and the second antenna component respectively radiate radio frequency signals in different frequency bands, so that the radio frequency signals of the antenna structure may cover frequency bands where 2G signals, 3G signals, 4G signals, 5G signals, and 6G signals are located, and a terminal device configured with the antenna structure may be compatible with 2G, 3G, 4G, 5G, and 6G communication modes.

Wherein the first antenna assembly comprises: a first radiator and a second radiator;

here, the second radiator may be a parasitic radiator of the first radiator; the first radiator and the second radiator are connected with the first feed source, the first radiator and the second radiator are located on the same connecting circuit, namely the first feed source is connected with the first radiator and is connected with the second radiator through the first radiator.

The first radiator and the second radiator may be made of a conductive material such as a metal or a non-metal, and the first radiator and the second radiator may be made of the same material or different materials. The present disclosure is not limited thereto.

The first radiator and the second radiator can be arranged at intervals; here, the interval may be set such that an insulating medium is filled between the first radiator and the second radiator, or only an interval between the first radiator and the second radiator, that is, air or the like is provided between the first radiator and the second radiator, as long as the second radiator is coupled to the first radiator.

The first radiator and the second radiator can convert an electric signal fed by the first feed source into a wireless signal, wherein the first radiator is used for radiating a first radio frequency signal of a first frequency band; the second radiator is coupled with the first radiator to generate a second radio frequency signal of a second frequency band. Here, the first frequency band and the second frequency band are at least partially different.

It can be understood that the first radiator generates a first resonant mode under the excitation of the electrical signal fed by the first feed source, wherein the operating frequency band of the first resonant mode is a first frequency band; the second radiator is coupled with the first radiator under the excitation of the electric signal fed in by the first feed source to generate a new second resonance mode; the working frequency band of the second resonance mode is a second frequency band; the first frequency band and the second frequency band are at least partially different.

It should be noted that, the characteristic radiation body in the resonant mode has a higher transmission efficiency of electromagnetic waves at the resonant frequency point of the resonant mode, that is, the radiation body has a higher transceiving efficiency at a certain resonant frequency point under the excitation of an electrical signal, and can further support the transceiving of electromagnetic wave signals of a section of frequency band near the resonant frequency point.

If the first frequency band and the second frequency band are not overlapped, namely the first frequency band and the second frequency band are different, the bandwidth of the radio-frequency signals radiated by the first antenna assembly can be effectively widened; if the first frequency band and the second frequency band are partially overlapped, the radiation efficiency of the radio frequency signal radiated by the first antenna assembly can be improved.

The second antenna assembly, comprising: a third radiator; and an antenna slot is formed between the first end of the third radiator and the first end of the first radiator, and the second end of the third radiator and the second end of the first radiator are both grounded. Here, non-metallic materials such as plastic may be injected into the antenna slot.

The third radiator may be made of a conductive material such as a metal or a non-metal, which is not limited in this disclosure.

The third radiator is connected with the second feed source and can convert the electric signal fed by the second feed source into a wireless signal, wherein the third radiator is used for radiating a third radio frequency signal of a third frequency band.

Here, the frequency point corresponding to the third frequency band is smaller than the frequency point corresponding to the first frequency band, and the frequency point corresponding to the first frequency band is smaller than the frequency point corresponding to the second frequency band.

It can be understood that a low-frequency rf signal can be transceived through the third radiator, a high-frequency rf signal can be transceived through the first radiator, and a new resonant mode is generated through a parasitic radiator (i.e., the second radiator) of the first radiator, thereby widening a bandwidth.

In the embodiment of the disclosure, the first antenna assembly and the second antenna assembly are respectively connected with the first feed source and the second feed source, so that the antenna structure can generate radio frequency signals in two different frequency band ranges, and the bandwidth characteristic of the antenna structure is improved;

Optionally, the first antenna assembly comprises:

In the embodiment of the present disclosure, the first radiator has a first feeding point, and the first feed source is electrically connected to the first feeding point, so that an electrical signal is fed to the first radiator through the first feeding point, and the first radiator is excited to radiate a first radio frequency signal.

The second radiator is provided with a second feeding point, and the second feeding point is electrically connected with the first feeding point; the first feed source is electrically connected with the first feed point, so that the first feed source feeds an electric signal to the second radiator through the first feed point and the second feed point, the second radiator is excited to be coupled with the first radiator, and a second radio-frequency signal is radiated.

Here, the first feeding point and the second feeding point may be electrically connected by a conductive dome.

In some embodiments, the second antenna assembly comprises:

and the second feed source is positioned on the third radiating body and is electrically connected with the third radiating body through the third feed point.

In an embodiment of the present disclosure, the third radiator has a third feeding point, and the second feed source is electrically connected to the third feeding point, so that an electrical signal is fed to the third radiator through the third feeding point, and the third radiator is excited to radiate a third radio frequency signal.

Optionally, the antenna structure 10, comprises:

the circuit board comprises the first feed source and the second feed source;

In an embodiment of the present disclosure, the antenna structure further includes: and a circuit board which is positioned between the first radiator and the second radiator and separates the first radiator and the second radiator.

Here, the circuit board may be a printed circuit board, and the printed circuit board may be a multi-layer board.

The surface of the circuit board facing the first radiator is provided with a through hole, and a first feed point of the first radiator is electrically connected with a second feed point of the second radiator through the through hole.

A conductive wire may be used to pass through the through-hole and electrically connect the first feeding point and the second feeding point.

Alternatively, the through hole may be a metalized through hole, and may be electrically contacted with the metalized through hole through a conductive elastic sheet, so as to electrically connect the first feeding point and the second feeding point. Here, the conductive elastic piece may be a conductive metal sheet made of an elastic metal material.

As shown in fig. 3, fig. 3 is a schematic structural diagram illustrating a connection of a first feeding point and a second feeding point according to an exemplary embodiment. The through hole on the circuit board 15 may be a metalized through hole 15a, and the second feeding point 112a is in contact with one end of the metalized through hole 15a by using a first conductive elastic sheet 112b, and is electrically connected to the first feeding point 111a through the metalized through hole 15a, so as to achieve electrical connection between the first feeding point and the second feeding point.

The first radiator and the second radiator are arranged on the same side of the circuit board at intervals, and an antenna slot is formed between the first radiator and the second radiator.

The first feed and the second feed may be integrated on the circuit board; the first feed source is electrically connected with a first feed point of the first radiator, and an electric signal is fed into the first radiator through the first feed point so as to excite the first radiator to radiate a first radio-frequency signal; the first feed source is electrically connected with a second feed point of the second radiator through the first feed point, and an electric signal is fed into the second radiator through the first feed point and the second feed point so as to excite the second radiator to be coupled with the first radiator and radiate a second radio frequency signal.

The second feed source is electrically connected with a third feed point of the third radiator, and an electric signal is fed into the third radiator through the third feed point so as to excite the third radiator to radiate a third radio frequency signal.

In some embodiments, the circuit board further includes a plurality of grounding points, and the grounding points are respectively connected to the second end of the first radiator and the second end of the third radiator, and are used for grounding the first radiator and the third radiator.

The embodiment of the present disclosure guides the high frequency current in the radiator to flow back to the ground by connecting the second end of the first radiator and the second end of the third radiator to the ground point.

Illustratively, as shown in fig. 4, fig. 4 is a schematic structural diagram of a first antenna assembly according to an exemplary embodiment. The second feeding point 112a of the second radiator 112 is electrically contacted with one end of the first conductive elastic sheet 112b, and the other end of the first conductive elastic sheet 112b is electrically contacted with one end of the metalized through hole 15a on the circuit board 15; the other end of the metallized through hole 15a on the circuit board 15 is electrically connected to the second conductive elastic piece 111b, and the second conductive elastic piece 111b is pressed and bounced to the first feeding point 111a of the first radiator 111.

Therefore, the first feed point of the first radiator is connected with the second feed point of the second radiator through the second conductive elastic sheet, the metalized through hole and the first conductive elastic sheet.

Optionally, the antenna structure 10 includes:

a first matching circuit 16; the first feed 13 is connected to the first feed point 111a of the first radiator 111 through the first matching circuit 16;

the first matching circuit 16 includes at least:

a first capacitor 161 and a first inductor 162;

wherein a first end of the first capacitor 161 is connected to the first feed 13, and a second end of the first capacitor 161 is connected to the first feeding point 111 a;

a first end of the first inductor 162 is connected to a second end of the first capacitor 161, and a second end of the first inductor 162 is grounded.

As shown in fig. 5, fig. 5 is a circuit schematic diagram illustrating a matching circuit of a first antenna assembly according to an example embodiment. In the embodiment of the present disclosure, a first matching circuit is connected between the first feed source and a first feed point of the first radiator; the electric signal generated by the first feed source is loaded to the first feed point through the first matching circuit, so that the first radiator radiates a first radio frequency signal of a first frequency band.

Here, the first matching circuit is configured to match impedances of the first feed and the first radiator.

It should be noted that the matching circuit, i.e., the antenna tuner, is used for performing impedance matching on the fed electrical signal to improve impedance efficiency. The impedance matching is carried out on the radiator through the matching circuit, so that the radiator has the maximum radiation power in the required working frequency band, and the quality of signals sent and received by the radiator is ensured.

Wherein the first matching circuit comprises at least:

a first capacitor and a first inductor;

a first end of the first capacitor is connected with the first feed source, and a second end of the first capacitor is connected with the first feed point; namely, the first capacitor is loaded on the first radiator in series.

Here, the capacitance of the first capacitor and the inductance of the first inductor may be designed according to an operating frequency band of the first radio frequency signal to be radiated by the first radiator.

It should be noted that, in the matching circuit, the capacitor not only has the function of impedance matching, but also is a high-impedance feed element, so that the radiator can generate a new resonance mode, and the resonance mode excited by the radiator is optimized. Due to the large capacitance of the capacitor loaded in series on the radiator, each resonant mode of the radiator will be affected greatly.

Therefore, the capacitance with smaller capacitance value is connected between the first feed point and the first feed source in series, so that the resonance generation mode of the radiating body can be changed, and the impedance matching effect can be achieved.

The first end of the first inductor is connected with the second end of the first capacitor, and the second end of the first inductor is grounded; namely, the first inductor is loaded on the first radiator in parallel.

Because the first radiator and the third radiator are only separated by an antenna slot, and the width of the antenna slot is small, the resonance of the high-order mode of the third radiator is easy to fall into the frequency range supported by the first radiator, and the problem of signal interference between the first radiator and the third radiator is caused.

According to the embodiment of the disclosure, a first capacitor is loaded on the first radiator in series, and a first inductor is loaded on the first radiator in parallel, so that on one hand, the impedance of the first feed source and the impedance of the first radiator can be matched, and the first radiator has the maximum radiation power within a first frequency band range; on the other hand, the isolation between the first radiator and the third radiator can be effectively improved.

It should be noted that, for a low-frequency signal, the parallel inductance is equivalent to an open circuit, and therefore, for the third radiator, the inductance parallel-loaded on the first radiator has an equivalent effect of an open circuit on the resonant mode of the third radiator, and the influence of the resonant mode of the first radiator on the third radiator can be reduced, and the isolation between the first radiator and the third radiator can be improved.

In some embodiments, the capacitance value of the first capacitor may be 1 picofarad and the inductance value of the first inductor may be 1.7 nanohenries.

In the embodiment of the present disclosure, by loading an inductor of 1.7 nanohenries in parallel on the first radiator and loading a capacitor of 1 picofarad in series, on one hand, the first radiator can receive and transmit electromagnetic wave signals in the WIFI2.4G frequency band, and on the other hand, the isolation between the first radiator and the third radiator can be effectively improved.

Optionally, the antenna structure 10 includes:

a second matching circuit 17; wherein, the second feed source 14 is connected to the third feed point 121a of the third radiator 121 through the second matching circuit 17;

the second matching circuit 17 includes at least:

a second capacitor 171, a first end of the second capacitor 171 is connected between the second feed 14 and the third feeding point 121a, and a second end is grounded.

As shown in fig. 6, fig. 6 is a circuit schematic diagram illustrating a matching circuit of a second antenna assembly according to an exemplary embodiment. In this disclosure, a second matching circuit is connected between the second feed source and a third feed point of the third radiator, and an electrical signal generated by the second feed source is loaded onto the second feed point through the second matching circuit, so that the third radiator radiates a third radio frequency signal in a third frequency band.

Here, the second matching circuit is configured to match impedances of the second feed and the third radiator.

Wherein the second matching circuit comprises at least: a second capacitor;

the first end of the second capacitor is connected between the second feed source and the third feed point, and the second end of the second capacitor is grounded; namely, the second capacitor is loaded on the third radiator in parallel.

Here, the capacitance of the second capacitor may be designed according to an operating frequency band of the third radio frequency signal to be radiated by the third radiator.

According to the embodiment of the disclosure, the second capacitor is loaded on the third radiator in parallel, so that on one hand, the impedance of the second feed source and the impedance of the third radiator can be matched, the third radiator has the maximum radiation power in a third frequency band range, and the radiation efficiency is improved; on the other hand, the isolation between the first radiator and the third radiator can be effectively improved.

In addition, since the parallel capacitance is equivalent to a short circuit for the high-frequency signal, the capacitance loaded in parallel on the third radiator has an equivalent effect of short-circuiting the high-order mode resonance of the first radiator to the ground for the first radiator, and the influence of the high-order mode resonance of the third radiator on the first radiator can be reduced.

It can be understood that, loading a capacitor in parallel on the third radiator is equivalent to adding a grounding point between the first radiator and the third radiator for isolation, and the isolation effect between the first radiator and the third radiator is more obvious when the capacitance value of the capacitor loaded in parallel is larger.

In some embodiments, the capacitance value of the second capacitor may be 3.8 picofarads.

In the embodiment of the present disclosure, a capacitor of 3.8 picofarads is loaded in parallel to the third radiator, so that the third radiator can receive and transmit electromagnetic wave signals in a WIFI5G frequency band, and on the other hand, the isolation between the first radiator and the third radiator is effectively improved.

Optionally, as shown in fig. 5, the antenna structure 10 includes:

a first end of the adjusting circuit 18 is connected to the second feeding point 112a of the second radiator 112, and a second end of the adjusting circuit 18 is connected to the first feeding point 111a of the first radiator 111;

the adjusting circuit 18 is configured to adjust a frequency band range of the second radio frequency signal radiated by the second radiator 112.

In the embodiment of the present disclosure, an adjusting circuit is connected between a first feeding point of the first radiator and a second feeding point of the second radiator; and the electric signal generated by the first feed source is loaded to the first feed point through the first matching circuit and is loaded to the second feed point through the regulating circuit, so that the second radiator is coupled with the first radiator, and the second radio-frequency signal of the second frequency band is radiated.

The second radiator is coupled with the first radiator under the excitation of the electric signal fed by the first feed source, so that a new second resonance mode is generated; the adjusting circuit connected in series between the first feeding point and the second feeding point can be used to adjust the resonant frequency of the second resonant mode of the second radiator, so as to adjust the frequency band range of the second radio frequency signal radiated by the second radiator.

Alternatively, as shown in fig. 5, the adjusting circuit 18 includes:

a third capacitor 181, said third capacitor 181 being connected in series between said second feeding point 112a and said first feeding point 111 a;

the capacitance of the third capacitor 181 is inversely related to the frequency value of the second rf signal radiated by the second radiator 112.

In the embodiment of the present disclosure, one end of a third capacitor is connected to the first feeding point, and the other end of the third capacitor is connected to the second feeding point, that is, the third capacitor is loaded in series between the first radiator and the second radiator.

Since the capacitance value of the third capacitor is inversely related to the frequency value of the second radio frequency signal radiated by the second radiator, that is, the larger the capacitance value of the third capacitor is, the lower the frequency value of the second radio frequency signal radiated by the second radiator is.

Therefore, the frequency value of the second radio frequency signal radiated by the second radiator can be increased by connecting a third capacitor with a smaller capacitance value in series between the first feeding point and the second feeding point, so that the bandwidth of the radio frequency signal radiated by the first antenna assembly is widened.

In some embodiments, the capacitance value of the third capacitor may be 0.6 picofarads.

Illustratively, as shown in fig. 7, fig. 7 is a circuit schematic diagram illustrating a matching circuit of an antenna structure according to an exemplary embodiment. The impedance matching is carried out based on the matching circuit shown in the figure, and the radiation efficiency and the bandwidth of the antenna structure in the working frequency band (namely 2.4GHz, 5GHz and 6GHZ frequency bands) of WIFI 6E are improved.

In an embodiment of the present disclosure, the first radiator and the second radiator may be radiators of an IFA antenna.

In the embodiment of the present disclosure, the second radiator may be a radiator manufactured by a Laser Direct Structuring (LDS) process; the second radiator can be directly radiussed on the antenna medium carrier through an LDS technology.

The LDS technology is a technology capable of directly laser an antenna to a nonmetal carrier, and the LDS antenna has the characteristics of stable performance, short manufacturing process, strong anti-interference capability, high space utilization rate and the like.

As shown in fig. 8, fig. 8 is a schematic current pattern diagram of an antenna structure according to an exemplary embodiment. The arrows in the figure show the direction of the current flow in the antenna structure.

For example, in order to verify the performance change of the antenna structure after the second radiator (i.e., the parasitic radiator) is added to the first antenna assembly, the antenna structure provided according to the embodiment of the present disclosure may be compared with the antenna structure in the related art. The length of the parasitic radiator is about 1/4 wavelengths of 7GHz, the working mode of the parasitic radiator is a monopole 1/4 wavelength mode, and tuning can be performed by adjusting the capacitance value of the third capacitor of the parasitic radiator.

As shown in fig. 9-10, fig. 9 is a comparative schematic diagram of the Smith circles of a two antenna configuration shown in accordance with an exemplary embodiment. Fig. 10 is a schematic diagram illustrating a comparison of S-parameter curves for two antenna structures in accordance with an exemplary embodiment. For convenience of description, an antenna structure to which a parasitic radiator is not added (i.e., an antenna structure shown in the related art) is referred to as a first antenna structure; the antenna structure with the parasitic radiator added (i.e., the antenna structure provided in the embodiments of the present disclosure) is referred to as a second antenna structure.

As can be seen from fig. 9 and 10, the second antenna structure generates a new resonance mode at a high frequency (reference numeral 1) compared to the first antenna structure, widening the operating bandwidth of the antenna structure.

As shown in fig. 11, fig. 11 is a schematic diagram illustrating a comparison of radiation efficiency of two antenna structures according to an exemplary embodiment. As can be seen from fig. 11, the second antenna structure has improved radiation efficiency at about 7GHz (reference numeral 2) compared to the first antenna structure. In addition, as the S parameter of the second antenna structure is better, the bandwidth is wider, the loss is reduced, the total system efficiency of the second antenna structure at the WIFI 6E sideband is greatly improved, and the sideband efficiency is improved by about 8 dB.

An embodiment of the present disclosure provides a terminal device, including:

the antenna structure shown in one or more of the above claims;

In this disclosure, the mobile terminal may include a mobile phone, a notebook, and a tablet computer, or may be a wearable electronic device, where the wearable electronic device includes a smart watch, and the present disclosure is not limited thereto.

It can be understood that the first radiator and the third radiator are both part of a metal middle frame of the terminal device, an antenna slot is formed between the first radiator and the radiator, and radiation is performed through the metal middle frame, so that communication of the terminal device is realized.

According to the embodiment of the disclosure, the metal middle frame of the terminal device is directly used as the first radiator and the third radiator of the antenna structure, so that the occupation ratio of the antenna structure to the screen of the terminal device is reduced, and the display area and the display effect of the terminal device are improved.

The metal middle frame is arranged on one side of the circuit board, the antenna support is arranged on the other side of the circuit board, a second radiator is arranged on the antenna support, and a second feed point of the second radiator is electrically connected with a first feed point of the first radiator.

The first radiator is connected with the first feed source and generates a first radio frequency signal of a first frequency band; the third radiator is connected with the second feed source and generates a third radio frequency signal of a third frequency band, wherein the first frequency band is different from the third frequency band, so that the terminal equipment can receive and transmit the wireless signal of the first frequency band and can simultaneously receive and transmit the wireless signal of the third frequency band, and the requirement of the terminal equipment for receiving and transmitting the wireless signal frequency band is expanded.

The first radiator generates a first radio frequency signal of a first frequency band under the excitation of the first feed source, the second radiator is coupled with the first radiator under the excitation of the first feed source to generate a new resonance mode and radiate a second radio frequency signal of a second frequency band, wherein the first frequency band and the second frequency band are at least partially different. Therefore, the working bandwidth of the terminal equipment can be effectively widened, and the radiation efficiency of the terminal equipment can be improved.

It should be noted that "first" and "second" in the embodiments of the present disclosure are merely for convenience of description and distinction, and have no other specific meaning.

Fig. 12 is a block diagram illustrating a terminal device according to an example embodiment. For example, the terminal device may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.

Referring to fig. 12, the terminal device may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal device, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the terminal device. Examples of such data include instructions for any application or method operating on the terminal device, contact data, phonebook data, messages, pictures, videos, etc. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power component 806 provides power to various components of the terminal device. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal device.

The multimedia component 808 includes a screen that provides an output interface between the terminal device and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. When the terminal device is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal device is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 814 includes one or more sensors for providing various aspects of state assessment for the terminal device. For example, sensor assembly 814 may detect the open/closed status of the terminal device, the relative positioning of components, such as a display and keypad of the terminal device, the change in position of the terminal device or a component of the terminal device, the presence or absence of user contact with the terminal device, the orientation or acceleration/deceleration of the terminal device, and the change in temperature of the terminal device. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal device and other devices in a wired or wireless manner. The terminal device may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal device may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. An antenna structure, comprising:

2. The antenna structure of claim 1, wherein the first antenna component comprises:

3. The antenna structure according to claim 2, characterized in that it comprises:

the circuit board comprises the first feed source and the second feed source;

4. The antenna structure according to claim 2, characterized in that it comprises:

the first matching circuit includes at least:

a first capacitor and a first inductor;

5. The antenna structure according to claim 2, characterized in that it comprises:

the second matching circuit includes at least:

6. The antenna structure according to claim 2, characterized in that it comprises:

7. The antenna structure according to claim 6, characterized in that the adjusting circuit comprises:

and the capacitance value of the third capacitor is inversely related to the frequency value of the second radio-frequency signal radiated by the second radiator.

8. The antenna structure of claim 1, wherein the first radiator and the third radiator are inverted-F shaped.

9. The antenna structure of claim 1, wherein the second radiator is a radiator fabricated by a laser direct structuring process.

10. A terminal device, comprising:

an antenna structure as claimed in any one of claims 1 to 9;