CN112751182A

CN112751182A - Antenna assembly and electronic equipment

Info

Publication number: CN112751182A
Application number: CN202011582484.7A
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: 2021-05-04

Abstract

The embodiment of the application discloses an antenna assembly and electronic equipment. Wherein, antenna module includes: a dielectric substrate, a metal patch and a capacitor patch; the metal patch is arranged on the dielectric substrate, is grounded and is used for transmitting radio frequency signals, and is provided with a through hole; the capacitor patch is arranged in the through hole, a gap exists between the periphery of the capacitor patch and the metal patch, and the capacitor patch is electrically connected with the metal patch through the gap and the electric field coupling of the metal patch so as to enable the metal patch to generate at least two resonant frequencies. Make the radio frequency signal frequency range of metal patch transmission wider through increasing the electric capacity paster in this application, improved the radiation efficiency of antenna module.

Description

Antenna assembly and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to an antenna assembly and electronic equipment.

Background

In the prior art, an antenna is required for the electronic equipment to transmit or receive electromagnetic waves. The application scenes of radio communication, broadcasting, television, radar, navigation and the like need to utilize electromagnetic waves to transfer information. With the iterative development of communication technology, the size of the antenna is also reduced, but when the size of the antenna is reduced, the length, the width and the height of the antenna are reduced, so that the antenna cannot cover some frequency bands, and the radiation efficiency of the antenna is lowered.

Disclosure of Invention

The embodiment of the application provides an antenna assembly and electronic equipment. The antenna assembly has high radiation efficiency and can radiate radio frequency signals in multiple frequency bands.

A dielectric substrate;

the metal patch is arranged on the dielectric substrate, is grounded and is used for transmitting radio frequency signals, and is provided with a through hole;

the capacitor patch is arranged in the through hole, a gap exists between the periphery of the capacitor patch and the metal patch, and the capacitor patch is electrically connected with the metal patch through the gap and the electric field coupling of the metal patch so as to enable the metal patch to generate at least two resonant frequencies.

In an embodiment of the present application, an antenna assembly and an electronic device are provided, in which the antenna assembly includes: a dielectric substrate, a metal patch and a capacitor patch; the metal patch is arranged on the dielectric substrate, is grounded and is used for transmitting radio frequency signals, and is provided with a through hole; the capacitor patch is arranged in the through hole, a gap exists between the periphery of the capacitor patch and the metal patch, and the capacitor patch is electrically connected with the metal patch through the gap and the electric field coupling of the metal patch so as to enable the metal patch to generate at least two resonant frequencies. Make the radio frequency signal frequency range of metal patch transmission wider through increasing the electric capacity paster in this application, improved the radiation efficiency of antenna module.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a first structural schematic diagram of an electronic device provided in an embodiment of the present application.

Fig. 2 is a first structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 3 is a second structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 4 is a third structural schematic diagram of an antenna assembly provided by an embodiment of the present application.

Fig. 5 is a fourth structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 6 is a fifth structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 7 is a sixth structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 8 is a seventh structural schematic diagram of an antenna assembly provided in an embodiment of the present application.

Fig. 9 is a second structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 10 is a reflection coefficient graph of an antenna assembly provided in an embodiment of the present application.

Fig. 11 is a system efficiency graph of an antenna assembly provided by an embodiment of the present application.

Fig. 12 is a first far field pattern of an antenna assembly provided by embodiments of the present application.

Fig. 13 is a second far field pattern of an antenna assembly provided by embodiments of the present application.

Fig. 14 is a third far-field pattern of an antenna assembly provided by embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

With the iterative development of communication technology, the size of the antenna is also reduced, but when the size of the antenna is reduced, the length, the width and the height of the antenna are reduced, so that the antenna cannot cover some frequency bands, and the radiation efficiency of the antenna is lowered.

In order to solve the problem, the embodiment of the application provides an antenna assembly and an electronic device. The antenna assembly has smaller thickness and can realize the transmission of multi-band radio frequency signals. Please refer to the following description.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a display screen 10, a housing 20, a circuit board 30, and a battery 40.

The display screen 10 is disposed on the casing 20 to form a display surface of the electronic device 100 for displaying images, texts, and other information. The Display screen 10 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

It will be appreciated that the display screen 10 may include a display surface and a non-display surface opposite the display surface. The display surface is a surface of the display screen 10 facing a user, i.e. a surface of the display screen 10 visible to a user on the electronic device 100. The non-display surface is a surface of the display screen 10 facing the inside of the electronic device 100. The display surface is used for displaying information, and the non-display surface does not display information.

It will be appreciated that a cover plate may also be provided over the display screen 10 to protect the display screen 10 from scratching or water damage. The cover plate may be a transparent glass cover plate, so that a user can observe contents displayed on the display screen 10 through the cover plate. It will be appreciated that the cover plate may be a glass cover plate of sapphire material.

The housing 20 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while forming a sealing and protecting function for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 20. It will be appreciated that the housing 20 may include a center frame and a rear cover.

The middle frame may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame is used for providing a supporting function for the electronic devices or functional components in the electronic device 100 so as to mount the electronic devices or functional components of the electronic device 100 together. For example, the middle frame may be provided with a groove, a protrusion, or the like, so as to facilitate installation of the electronic device or the functional component of the electronic apparatus 100. It is understood that the material of the middle frame may include metal or plastic.

The rear cover is connected with the middle frame. For example, the rear cover may be attached to the middle frame by an adhesive such as a double-sided tape to achieve connection with the middle frame. The rear cover is used for sealing the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame and the display screen 10, so as to protect the electronic devices and functional components of the electronic device 100. It will be appreciated that the rear cover may be integrally formed. In the forming process of the rear cover, a structure such as a camera mounting hole of the rear camera can be formed on the rear cover. It is understood that the material of the rear cover may also include metal or plastic.

A circuit board 30 is disposed inside the housing 20. For example, the circuit board 30 may be mounted on a middle frame of the case 20 to be fixed, and the circuit board 30 is sealed inside the electronic device by a rear cover. Specifically, the circuit board may be installed at one side of the loading plate, and the display screen is installed at the other side of the loading plate. The circuit board 30 may be a main board of the electronic device 100. One or more of functional components such as a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated on the circuit board 30. Meanwhile, the display screen 10 may be electrically connected to the circuit board 30 to control the display of the display screen 10 by a processor on the circuit board 30.

The battery 40 is disposed inside the case 20. For example, the battery 40 may be mounted on a middle frame of the case 20 to be fixed, and the battery 40 is sealed inside the electronic device by a rear cover. Meanwhile, the battery 40 is electrically connected to the circuit board 30 to enable the battery 40 to supply power to the electronic device 100. The circuit board 30 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic devices in the electronic apparatus 100.

The electronic device 100 is further provided with an antenna assembly, and the antenna assembly is configured to radiate a radio frequency signal to the outside and receive a radio frequency signal from the outside, so as to implement a wireless communication function of the electronic device 100. The radio frequency signal may include one of a cellular network signal, a Wireless Fidelity (Wi-Fi) signal, a positioning signal, and the like.

With reference to fig. 2, fig. 2 is a schematic view of a first structure of an antenna element according to an embodiment of the present application.

The antenna assembly may be a uwb (ultra wide) antenna. The UWB antenna can be accurately positioned indoors, for example, an electronic device equipped with the UWB antenna can recognize other nearby UWB tag antennas through the UWB antenna, so that the positions of other electronic devices can be determined according to the UWB tag antennas of other electronic devices.

UWB wireless communication is a communication method using pulses with extremely short time intervals (less than 1ns) without using a carrier, and is a carrier-free communication technique that transmits data using non-sinusoidal narrow pulses on the order of nanoseconds to picoseconds. By transmitting very low power signals over a wide frequency spectrum, UWB can achieve data transmission rates of hundreds of Mbit/s to Gbit/s over a range of about 10 meters. The anti-interference performance is strong, the transmission rate is high, the system capacity is large, and the transmission power is very small. UWB antenna transmission power is very small and communication devices can communicate with less than 1mW of transmission power. The low transmitting power greatly prolongs the working time of the system power supply. Moreover, the emission power is low, and the influence of electromagnetic wave radiation on a human body is small.

However, when the internal space of the electronic device is very small, the antenna assembly needs to be reduced in size, and the length, width, and height of the antenna assembly need to be reduced. In the case where the antenna assembly is a UWB antenna, the frequency of the radio frequency signal that the UWB antenna can transmit changes, which results in a poor positioning effect of the electronic device by the UWB antenna.

In an embodiment of the present application, an antenna assembly is provided, which includes a metal patch 510, a dielectric substrate 520, and a metal floor 530, wherein the metal patch 510 is disposed on the dielectric substrate 520, and the metal floor 530 is disposed on the other side of the dielectric substrate 520 facing away from the metal patch 510. I.e. the dielectric substrate 520 is arranged between the metal floor 530 and the metal patch 510.

The antenna component has a thin thickness. For example, the thickness from the metal patch 510 to the metal floor 530 may reach 0.38 mm, and the antenna assembly is very thin and light and may be disposed in an electronic device with a small internal space.

Meanwhile, the metal patch 510 is connected with a corresponding feeder line, and the feeder line may also be disposed on the dielectric substrate 520. The dielectric substrate 520 is provided with a through hole through which a feed line can pass, and the feed line can be connected to a corresponding feed source of the antenna assembly through the through hole.

In some embodiments, corresponding through holes are provided in the metal ground plane 530, the through holes in the dielectric substrate 520 and the through holes in the metal ground plane 530 are aligned, and the feed lines of the metal patches 510 can be connected to corresponding feeds of the antenna assemblies through the two aligned through holes.

With continued reference to fig. 3, fig. 3 is a schematic diagram of a second structure of an antenna element according to an embodiment of the present application.

The reduced size of the antenna component also results in a smaller thickness of the antenna component, which affects the frequency range over which the antenna component radiates. For example, when the antenna assembly is not dimensionally changed, the frequency at which the antenna assembly operates is P1, and the free space wavelength corresponding to frequency P1 is λ 1, the thickness of the corresponding antenna assembly is 0.08 λ 1. When the size of the antenna component is reduced, the thickness of the antenna component is also reduced, so that the free space wavelength is also changed from λ 1 to λ 2, and the frequency corresponding to the free space wavelength λ 2 is P2.

That is, the antenna assembly size change results in the absence of the frequency P1 within the operating frequency range of the antenna assembly, which has not been satisfactory for operation at the frequency P1.

In order to solve the problem, in the embodiment of the present application, a capacitor patch 540 is added, the capacitor patch 540 and the metal patch 510 are disposed on the same plane, and a gap 511 exists between the capacitor patch 540 and the metal patch 510.

Wherein, a through hole is arranged on the metal patch 510, and in the through hole, the capacitor patch 540 can be arranged, and the capacitor patch 540 is not in contact with the metal patch 510. When the antenna assembly is powered on, the capacitive patch 540 and the metal patch 510 generate a coupling capacitance through a gap 511 therebetween.

In some embodiments, the shape of the capacitive patch 540 may be the same as the shape of the via, the size of the capacitive patch 540 is smaller than the via, and the geometric center of the capacitive patch 540 and the geometric center of the via are overlapped, thereby ensuring that the coupling capacitance generated by the capacitive patch 540 and the metal patch 510 through the gap 511 therebetween is stable and constant. The stable and unchangeable coupling capacitance can enable the antenna assembly to have better working stability.

With continued reference to fig. 4, fig. 4 is a schematic diagram illustrating a third structure of an antenna element according to an embodiment of the present application.

The antenna assembly further includes a metal connector 550, the metal connector 550 is a hollow cylinder, the metal connector 550 has only a peripheral cylinder wall, the metal connector 550 does not have a top and a bottom, the metal connector 550 penetrates through the dielectric substrate 520 and the metal floor 530, and one end of the metal connector 550 is connected to the capacitor patch 540.

The metal connector 550 may serve to support and fix the antenna assembly, and since the metal connector 550 is hollow, a feeder line corresponding to the metal patch 510 may pass through the hollow region, one end of the feeder line may be connected to a feeding point of the metal patch 510, and the other end of the feeder line may be connected to a corresponding feed source.

In some embodiments, a through hole on the metal patch 510, in which one end of the metal connector 550 is located. A capacitive patch 540 is also placed in the via and maintains a gap 511 with the metal patch 510.

The height H of the antenna assembly is the height of the metal patch 510 to the metal floor 530, wherein the height H of the antenna assembly is 0.38 millimeters.

Referring to fig. 5, fig. 5 is a fourth structural schematic diagram of an antenna assembly according to an embodiment of the present application.

In some embodiments, the metal patch 510 is a rectangular metal patch 510, and a feeding point may be first disposed on a diagonal line of the metal patch 510, so that a first resonant frequency and a second resonant frequency may be generated, and the first resonant frequency and the second resonant frequency are proportional to the length L and the width W of the metal patch 510, as particularly shown in fig. 3.

After the feeding point is set, the capacitive patch 540 may also be set on a diagonal line to the metal patch 510 where the feeding point is located, and the capacitive patch 540 and the feeding point are not in the same area. Of course, it is also possible to place the feeding point on a first diagonal of the metal patch 510 and the capacitive patch 540 on a second diagonal of the metal patch 510.

In some embodiments, the capacitor patch 540 also has a corresponding feeding point, and when the feeding point corresponding to the metal patch 510 and the feeding point corresponding to the capacitor patch 540 are both powered on, a coupling capacitor is formed between the capacitor patch 540 and the metal patch 510 due to the gap 511 between the capacitor patch 540 and the metal patch 510. The antenna assembly generates a third resonant frequency based on the coupling capacitance. The third resonant frequency corresponds to a new operating frequency, thereby increasing the range of frequencies that the antenna assembly can transmit.

Referring to fig. 6, fig. 6 is a fifth structural schematic diagram of an antenna assembly according to an embodiment of the present application.

In some embodiments, a plurality of capacitive patches 540 may be further disposed on the metal patch 510, for example, the capacitive patch 540 is a first capacitive patch, and on a diagonal line where the first capacitive patch is located, a second capacitive patch 560 may be further disposed, a second gap 511 exists between the second capacitive patch 560 and the metal patch 510, the second capacitive patch 560 and the metal patch 510 are in the same plane, when the second capacitive patch 560 and the metal patch 510 are powered on, a second coupling capacitor may be generated between the second capacitive patch 560 and the metal patch 510, and the antenna assembly generates a fourth resonant frequency through the second coupling capacitor.

In some embodiments, the second capacitive patch 560 may be on a different diagonal than the first capacitive patch. Or the second capacitive patch 560 may be disposed elsewhere on the metal patch 510 rather than on a diagonal of the metal patch 510.

Referring to fig. 7, fig. 7 is a sixth structural schematic diagram of an antenna assembly according to an embodiment of the present application.

Wherein corresponding through holes are provided in the metal floor 530, through which the cables can be connected with the metal patches 510 and the capacitive patches 540.

The antenna assembly further comprises a matching circuit 570, a receiving module 580 and a feed source, one end of the matching circuit 570 is connected with the capacitive patch 540 and the metal patch 510, and the other end of the matching circuit 570 is connected with the receiving module 580 and the feed source.

When the metal patch 510 receives the corresponding rf signal, the rf signal may be processed by the matching circuit 570, and then the processed rf signal is transmitted to the receiving module 580, and the receiving module 580 processes the processed rf signal to obtain corresponding data.

For example, the metal patch 510 may be used to receive an ultra-wideband radio frequency signal transmitted by a communication object, and the receiving module 580 may then process the ultra-wideband radio frequency signal to obtain corresponding data, thereby determining the location of the communication object.

When the antenna assembly needs to transmit a radio frequency signal, the feed source can provide a source signal, the source signal is processed by the matching circuit 570, and then the processed source signal is sent to the metal patch 510 and the capacitor patch 540, so that the radio frequency signal corresponding to an external radiation source signal is realized.

In some embodiments, the receiving module 580 and the feed may be integrated on one module, e.g., the receiving module 580 and the feed may be different functions of one processor. I.e., the processor may perform transmission and reception of radio frequency signals.

Referring to fig. 8, fig. 8 is a seventh structural schematic diagram of an antenna assembly according to an embodiment of the present application.

As shown in fig. 8, the antenna assembly may be composed of a plurality of antenna assemblies in the above embodiments. For example, the antenna assembly provided in the above embodiment is the first antenna assembly, and the antenna assembly shown in fig. 8 further includes the second antenna assembly and the third antenna assembly.

The second antenna component comprises a second dielectric substrate 520, a second metal patch 510 and a third capacitive patch 540, and the third antenna component comprises a third dielectric substrate 520, a third metal patch 510 and a fourth capacitive patch 540. Wherein the first and second antenna components are aligned in the AA direction and the second and third antenna components are aligned in the BB direction.

In some embodiments, the antenna assembly shown in fig. 8 is in three-dimensional space with the AA direction as the Y-axis, the BB direction as the X-axis, and the direction perpendicular to the plane of the paper as the Z-axis. When the antenna assembly is powered on, the first and second antenna assemblies may be used to receive radio frequency signals in the yoz plane, i.e. in the first plane. The third and second antenna assemblies may be used to receive xoz plane radio frequency signals, i.e., to receive second plane radio frequency signals. And the first antenna assembly, the second antenna assembly, and the third antenna assembly can be used to receive radio frequency signals within the xoy plane.

By the arrangement shown in fig. 8, the antenna assembly can receive radio frequency signals in multiple directions in a three-dimensional space, and simultaneously, the antenna assembly can transmit radio frequency signals to multiple directions, so that the radiation performance of the antenna assembly is enhanced.

In some embodiments, the first antenna assembly, the second antenna assembly, and the third antenna assembly may also transceive radio frequency signals in different frequency bands, respectively. For example, the first antenna assembly transmits radio frequency signals in a first frequency band, the second antenna assembly transmits radio frequency signals in a second frequency band, and the third antenna assembly transmits radio frequency signals in a third frequency band. Thereby increasing the frequency band of the radio frequency signal that the antenna assembly can receive and dispatch, in order to strengthen the radiation performance of the antenna assembly.

Referring to fig. 9, fig. 9 is a second structural schematic diagram of an electronic device according to an embodiment of the present application.

The housing 20 includes a middle frame 22 and a back cover 21, and the middle frame may be made of metal or nonmetal. The rear cover 21 is made of a non-metal material, for example, a material such as ceramic, plastic, glass, etc. may be used to make the rear cover 21.

In some embodiments, the antenna assembly provided in the embodiments of the present application may be disposed on a side of the rear cover 21 facing the inside of the electronic device. For example, the antenna assembly may be attached to a face of the rear cover 21 facing the electronic device, that is, an inner surface of the rear cover 21.

Referring to fig. 10, fig. 10 is a reflection coefficient graph of an antenna element according to an embodiment of the present disclosure.

In fig. 10, the horizontal axis represents frequency, and the vertical axis represents parameters of an S-curve. The capacitive patch 540 is not disposed in the antenna 1, that is, the antenna 1 is formed by only combining the metal patch 510, the dielectric substrate 520 and the metal ground 530. The antenna 2 is provided with a capacitor patch 540, that is, the metal patch 510 and the capacitor patch 540 are in the same plane, and then are disposed on the dielectric substrate 520, and finally, a metal floor 530 is further disposed.

Wherein, X1 is the first resonance frequency, X2 is the second resonance frequency, and X3 is the third resonance frequency. As can be seen from fig. 10, the antenna 1 can only generate the first resonant frequency X1 and the second resonant frequency X2 due to the reduction in size of the antenna assembly. The frequency range covered by the antenna 1 is now limited.

In the antenna 2, due to the addition of the capacitor patch 540, the capacitor patch 540 and the metal patch 510 generate a coupling capacitor, and then through the action of the matching circuit 570, the antenna 2 can generate a third resonant frequency X3, and the frequency corresponding to the third resonant frequency X3 is about 6.75 GHz. The coverage range of the whole antenna 2 is about 6.25 GHz-6.75 GHz, the frequency coverage range of the antenna 2 is increased, and the radiation efficiency and the radiation performance of the antenna 2 are improved.

With continued reference to fig. 11, fig. 11 is a system efficiency graph of antenna elements of the antenna assembly provided by the present application.

In fig. 11, the horizontal axis represents frequency and the vertical axis represents radiation efficiency. When the antenna assembly realizes uwb positioning, the antenna efficiency to be realized is high, and as can be seen from fig. 11, when the radiation frequency of the antenna assembly is within 6.25GHz to 6.75GHz, the system efficiency of the antenna assembly is about-9.9 dB to 3.6dB, and the average system efficiency is about-5.8 dB. The antenna assembly has high radiation efficiency and good radiation performance.

Referring to fig. 12, fig. 12 shows a first far-field pattern of an antenna assembly according to an embodiment of the present application. The radiation frequency of the antenna assembly is 6.35GHz, and as can be seen from fig. 12, the antenna assembly has a very stable directivity value of about 7.75dBi, and the radiation intensities of the antenna along the x axis and the y axis are similar, and the antenna assembly also has a certain radiation intensity in a direction with a larger angle.

Referring to fig. 13, fig. 13 is a second far-field pattern of an antenna assembly according to an embodiment of the present application. The radiation frequency of the antenna assembly is 6.49GHz, and as can be seen from fig. 13, the very stable value of the directivity of the antenna assembly is about 7.75dBi, the radiation intensities of the antenna along the x axis and the y axis are similar, and the antenna also has a certain radiation intensity in the direction with a larger angle.

Referring to fig. 14, fig. 14 is a third far-field pattern of an antenna assembly according to an embodiment of the present application. The radiation frequency of the antenna assembly is 6.71GHz, and as can be seen from fig. 14, the very stable values of the directivity of the antenna assembly are all around 7.75dBi, the radiation intensities of the antenna along the x axis and the y axis are similar, and the antenna assembly also has a certain radiation intensity in the direction with a larger angle.

The above detailed description is provided for an antenna assembly and an electronic device provided in the embodiments of the present application, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the above 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 assembly, comprising:

a dielectric substrate;

the capacitor patch is arranged in the through hole, a gap exists between the periphery of the capacitor patch and the metal patch, and the capacitor patch is coupled with the metal patch through the gap to realize electric field coupling so that the metal patch generates at least two resonant frequencies.

2. The antenna assembly of claim 1, wherein the capacitive patch and the metallic patch are coupled by an electric field through the slot to create a coupling capacitance.

3. The antenna assembly of claim 2, wherein the metal patch comprises a feed point for connection to a feed source for receiving radio frequency signals fed from the feed source.

4. The antenna assembly of claim 3, wherein the metal patch is rectangular in shape, and the feed point is disposed on a diagonal of the metal patch.

5. The antenna assembly of claim 2, further comprising:

the matching circuit is electrically connected with the capacitor patch, and the matching circuit and the capacitor patch jointly enable the metal patch to generate at least two resonant frequencies.

6. The antenna assembly of claim 5, wherein the metal patch is configured to generate a first resonant frequency and a second resonant frequency, and wherein the coupling capacitor is configured to generate a third resonant frequency.

7. The antenna assembly of claim 6, wherein the metal patch is configured to receive ultra-wideband radio frequency signals emitted by the communicating object;

the antenna assembly further comprises a receiving module connected with the matching circuit, and the receiving module is used for processing the ultra-wideband radio frequency signal to determine the position of the communication object.

8. The antenna assembly of claim 1, further comprising:

a metal floor forming a system ground;

the metal connector is a hollow cylinder, and the metal connector penetrates through the medium substrate to connect the metal patch and the metal floor.

9. The antenna assembly of any one of claims 1-8, wherein a distance between the metal patch and the metal floor is 0.38 millimeters.

10. An electronic device comprising any one of the antenna assemblies 1-9, wherein the plurality of antenna assemblies comprises a first antenna assembly, a second antenna assembly, and a third antenna assembly;

wherein the first and second antenna elements are arranged in a first direction, the second and third antenna elements are arranged in a second direction, and the first direction is perpendicular to the second direction.

11. The electronic device of claim 10, wherein the first and second antenna assemblies are arranged along a first direction, the first and second antenna assemblies configured to receive radio frequency signals in a first plane;

the second and third antenna assemblies are arranged along a second direction, the second and third antenna assemblies for receiving radio frequency signals in a second plane, the first and second planes being orthogonal.