CN215418564U

CN215418564U - Antenna assembly and electronic equipment

Info

Publication number: CN215418564U
Application number: CN202121683241.2U
Authority: CN
Inventors: 吴敏超
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-01-04
Anticipated expiration: 2031-07-22

Abstract

The application relates to an antenna assembly and an electronic device. The antenna assembly includes: the first DC blocking circuit is used for isolating the DC signal; a first conductive part for forming a radiator, a part of the first conductive part being disposed in a first direction, the remaining part of the first conductive part being disposed in a second direction intersecting the first direction; the first conductive part is provided with a back point which is grounded through the first DC blocking circuit; the detection circuit is connected with the return point and is used for detecting the capacitance value between the first conductive part and the object to be detected so as to carry out SAR detection in the first direction, the second direction, the third direction and the fourth direction; wherein the third direction is perpendicular to the first direction and the second direction and opposite to the fourth direction. By adopting the scheme of the application, SAR detection of at least 4 surfaces can be realized, and the comprehensiveness of detection is improved.

Description

Antenna assembly and electronic equipment

Technical Field

The present application relates to the field of electronic devices, and in particular, to an antenna assembly and an electronic device.

Background

With the increasing radiation power of electronic devices, the influence of electromagnetic radiation on human body is increasingly emphasized. In measuring the influence of electromagnetic radiation on the human body, it is generally evaluated by the size of SAR (Specific Absorption Rate). When a human body approaches the electronic device, the influence of the electronic device on the human body needs to be smaller than a certain SAR critical value. The threshold value is defined differently in different regions, for example, the european region defines the threshold value as 2W/Kg, and the FCC (Federal Communications Commission) defines the threshold value as 1.6W/Kg.

In order to enable the electronic equipment to meet the requirement of the corresponding SAR critical value, the electronic equipment can carry out SAR detection and adjust the transmitting power of the equipment according to the detection result. However, the existing electronic device has the problem of incomplete detection, which easily causes the SAR of the electronic device to exceed the critical value requirement.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an antenna module and electronic equipment, can carry out SAR to a plurality of directions and detect, and then improve the comprehensiveness of detecting.

An antenna assembly, comprising:

the first DC blocking circuit is used for isolating the DC signal;

a first conductive part for forming a radiator, a part of the first conductive part being disposed in a first direction, the remaining part of the first conductive part being disposed in a second direction intersecting the first direction; the first conductive part is provided with a back point which is grounded through the first DC blocking circuit;

the detection circuit is connected with the return point and is used for detecting the capacitance value between the first conductive part and the object to be detected so as to carry out SAR detection in the first direction, the second direction, the third direction and the fourth direction; wherein the third direction is perpendicular to the first direction and the second direction and opposite to the fourth direction.

An electronic device, comprising:

the above-described antenna assembly;

the first conductive part is formed on the conductive frame;

the substrate is arranged in a cavity formed by enclosing the conductive frame, and the first blocking circuit and the detection circuit are arranged on the substrate.

In the antenna assembly and the electronic device, since the capacitance value between the first conductive part and the object to be detected (such as a human body) changes along with the change of the relative position relationship or the relative motion state between the first conductive part and the object to be detected, the detection circuit can perform the SAR detection based on the capacitance value of the first conductive part. A portion of the first conductive portion is disposed in the first direction, and the remaining portion is disposed in the second direction. When the relative state between the first conductive part and the object to be measured positioned in the first direction, the second direction, the third direction or the fourth direction is changed, the capacitance value of the first conductive part is changed. Therefore, the detection circuit can perform SAR detection in the first direction, the second direction, the third direction and the fourth direction by detecting the capacitance value between the first conductive part and the object to be detected, so that SAR detection of at least 4 surfaces (namely a surface perpendicular to the first direction, a surface perpendicular to the second direction and two surfaces perpendicular to the third direction) can be realized, and the detection comprehensiveness is improved. Therefore, after the electronic equipment adjusts the transmitting power according to the detection data, the SAR of the electronic equipment can meet the requirement of the relevant critical value, the safety of the communication process can be further improved, and the electronic equipment can meet the requirement of relevant laws and regulations.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an antenna element according to one embodiment;

FIG. 2 is a second schematic diagram of an antenna element according to an embodiment;

FIG. 3 is a third exemplary schematic diagram of an antenna element configuration;

FIG. 4 is a fourth schematic diagram of an antenna element according to an embodiment;

FIG. 5 is a circuit diagram of a second DC blocking circuit according to an embodiment;

FIG. 6 is a fifth schematic diagram of an antenna element according to an embodiment;

FIG. 7 is a circuit diagram of a first tuning module according to an embodiment;

FIG. 8 is a circuit diagram of a second tuning module according to an embodiment;

FIG. 9 is a circuit diagram of a bandpass filter circuit according to an embodiment;

FIG. 10 is a circuit diagram of a detection circuit according to an embodiment;

FIG. 11 is a schematic structural diagram of an electronic device according to an embodiment;

FIG. 12 is a second schematic structural diagram of an electronic apparatus according to an embodiment;

FIG. 13 is a third exemplary schematic view of an electronic apparatus according to an embodiment;

fig. 14 is a block diagram of a structure of a part related to an electronic device provided in an embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that the terms "first," "second," and the like as used herein may be used herein to describe various features, but these elements are not limited by these terms. These terms are only used to distinguish one feature from another. For example, a first conductive portion may be referred to as a second conductive portion, and similarly, a second conductive portion may be referred to as a first conductive portion, without departing from the scope of the present application. The first conductive portion and the second conductive portion are both conductive portions, which are different regions on the conductive bezel.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, the meaning of "above" includes the present number, e.g., two or more includes two, unless specifically limited otherwise.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.

It is to be understood that the specific frequency ranges of the "low band", "middle band" and "high band" referred to in this application may be determined according to the communication frequency bands supported by the antenna assembly or the electronic device to which the antenna assembly is applied, and the present application is not limited thereto. The term "mid-high band" is understood to include at least the frequency range corresponding to the mid-high band and the frequency range corresponding to the high band. Optionally, the mid-high band may comprise more frequencies than the frequency range in which the mid-high band corresponds to the high band.

The lowest frequency of the low frequency band may be less than the lowest frequency of the intermediate frequency band, and the lowest frequency of the intermediate frequency band may be less than the lowest frequency of the high frequency band. In one embodiment, the highest frequency of the low frequency band may be smaller than the lowest frequency of the middle frequency band, and the highest frequency of the middle frequency band may be smaller than the lowest frequency of the high frequency band, so that the frequency ranges of the frequency bands do not overlap, so as to design and determine the transceiving antenna and the processing link for the communication signals of the frequency bands. In one example, the low frequency band refers to 703MHz to 960MHz, the mid-band may be 1710MHz to 2170MHz, the high frequency band refers to 2300MHz to 2690MHz, and the mid-band refers to 1710MHz to 2690 MHz.

It is understood that the first direction X1 and the second direction X2 referred to in the present application refer to any two directions that are not parallel to each other, and the first direction X1 intersects the second direction X2. In one embodiment, the first direction X1 may be perpendicular to the second direction X2. As shown in fig. 1, the first direction X1 may be the direction shown in the drawing or the direction opposite to the direction shown in the drawing. The second direction X2 may be the direction shown in fig. 1 or the direction opposite to the direction shown in the drawing. The third direction X3 and the fourth direction X4 are two opposite directions, and the third direction X3 is perpendicular to the first direction X1 and the second direction X2, and the fourth direction X4 is perpendicular to the first direction X1 and the second direction X2.

As described in the background, the prior art has the problem of incomplete detection when performing SAR detection. In addition, when the antenna assembly is provided with a plurality of conductive portions arranged at intervals, in the prior art, the conductive portion arranged on the low-frequency-band radiator (hereinafter referred to as a low-frequency-band conductive portion) is used as an inductor, and during detection, the SAR sensor acquires a capacitance value of the low-frequency-band conductive portion and determines a relative position relationship or a relative motion state of the electronic device and the human body according to the capacitance value. However, since the signal wavelength of the low-band rf signal is greater than that of the medium-high band rf signal, the size of the low-band conductive part needs to have a longer length to complete the transmission and reception of the low-band rf signal, resulting in a larger area of the low-band conductive part. In the case of a large area, a larger capacitance is easily generated on the low-frequency-band conductive portion, that is, in comparison with a conductive portion (hereinafter, referred to as a high-frequency-band conductive portion) having a small area and provided with a medium-high-frequency radiator, under the condition that the distance between the conductive portion and the object to be measured is the same, the capacitance value between the low-frequency-band conductive portion and the object to be measured is larger than the capacitance value between the high-frequency-band conductive portion and the object to be measured. Therefore, the SAR sensor is prone to overflow when detecting the capacitance value of the low-frequency conductive part, that is, the problem of exceeding the range of the sensor is prone to occur, so that the data output by the SAR sensor cannot accurately reflect the actual situation. If the electronic device adjusts the transmission power according to the data, the SAR value of the adjusted electronic device may still exceed the threshold value.

In order to solve the problems in the prior art, in the present application, a portion of the first conductive part is disposed along the first direction X1, and the remaining portion is disposed along the second direction X2 intersecting the first direction X1, so as to perform SAR detection in the first direction X1, the second direction X2, the third direction X3, and the fourth direction X4, thereby implementing SAR detection on at least 4 planes and improving the detection comprehensiveness. In some embodiments, in the case that the antenna assembly includes two conductive parts, the present application uses the first conductive part with a smaller area as a sensor in the SAR detection process, thereby ensuring that the capacitance value of the first conductive part falls within the range of the detection circuit in each relative state, so as to ensure that the detection data obtained by the detection circuit can accurately reflect the position condition or the motion condition between the electronic device and the object to be detected. Therefore, after the electronic equipment adjusts the transmitting power according to the detection data, the SAR value of the electronic equipment can meet the requirement of a relevant critical value, and the safety of the communication process can be further improved.

The antenna assembly 10 according to the embodiments of the present application may be applied to an electronic device with a wireless communication function, which may be, but not limited to, a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing devices connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and so on.

As shown in fig. 1, the present embodiment provides an antenna assembly 10 including a first dc blocking circuit M1, a first conductive portion 110, and a detection circuit M2. The first conductive part 110 is used to form a radiator, so as to radiate a radio frequency signal through the radiator and implement wireless communication. The first conductive part 110 is provided with one or more ground return points, which are grounded through a first dc blocking circuit M1, wherein the first dc blocking circuit M1 is used for isolating dc signals. In this way, the first conductive part 110 forms a floating antenna structure, that is, the first conductive part 110 has no current path directly falling to the ground, and the whole conductive part is floated.

The first conductive portion 110 includes a first portion and a second portion connected to the first portion, the first portion and the second portion are respectively disposed along two mutually non-parallel directions, that is, the first portion is disposed along the first direction X1, the second portion is disposed along the second direction X2, and the second direction X2 intersects the first direction X1. In one embodiment, the first direction X1 is perpendicular to the second direction X2, and the first conductive portion 110 is an L-shaped structure.

Under the condition that the object to be detected is located in the first direction X1, the second direction X2, the third direction X3 and/or the fourth direction X4, if the relative position relationship or the relative motion state between the first conductive part 110 and the object to be detected changes, the capacitance value between the first conductive part 110 and the object to be detected (hereinafter referred to as the capacitance value of the first conductive part 110) can be changed accordingly, so that the relative state between the electronic device and the object to be detected located in the first direction X1, the second direction X2, the third direction X3 and/or the fourth direction X4 can be reflected through the capacitance value of the first conductive part 110, and multi-directional SAR detection is achieved.

The detection circuit M2 is connected to the return point, and is configured to detect a capacitance between the first conductive part 110 and the object to be detected, so as to perform SAR detection in the first direction X1, the second direction X2, the third direction X3, and the fourth direction X4, so that the electronic device can adjust the transmission power according to the detection data. In one embodiment, the detection circuit M2 may further determine the SAR parameter according to the capacitance value of the first conductive part 110, where the SAR parameter refers to a parameter directly or indirectly reflecting the SAR value, and may be, but is not limited to, a relative distance value between the electronic device and the object to be measured. It is understood that the constituent elements and the circuit structure of the detection circuit M2 can be determined according to the application requirements (such as SAR parameter type, circuit cost, circuit volume and/or detection data accuracy, etc.), and the application is not limited thereto.

In this embodiment, a part of the first conductive part 110 is disposed along the first direction X1, and the rest is disposed along the second direction X2, so that the detection circuit can perform SAR detection to the first direction X1, the second direction X2, the third direction X3, and the fourth direction X4 by detecting the capacitance value between the first conductive part 110 and the object to be detected, thereby realizing SAR detection of at least 4 planes (i.e., a plane perpendicular to the first direction X1, a plane perpendicular to the second direction X2, and two planes perpendicular to the third direction X3), and improving the detection comprehensiveness. Therefore, after the electronic equipment adjusts the transmitting power according to the detection data, the SAR of the electronic equipment can meet the requirement of the relevant critical value, the safety of the communication process can be further improved, and the electronic equipment can meet the requirement of relevant laws and regulations.

As shown in fig. 2, in one embodiment, the first conductive section 110 is provided with a plurality of ground return points, such as 2, 3 ground return points, etc. The detection circuit M2 can be connected to any one of the points to detect the capacitance between the first conductive part 110 and the object to be tested. To ensure that the entire conductive portion of the first conductive portion 110 is floating, each ground return point is grounded through the first dc blocking circuit M1. Specifically, the first dc blocking circuit M1 includes a plurality of capacitors C1, each ground point being grounded via one or more capacitors C1. It is understood that the number of the capacitors C1 connected to each ground point and the connection relationship between each ground point and the capacitor C1 may be determined according to actual design requirements (such as the magnitude of the current flowing through the first conductive part 110 and/or the capacitance of each capacitor C1), and the disclosure is not limited thereto. For example, in the case where a ground return point is grounded through a plurality of capacitors C1, the ground return point may be grounded through a plurality of capacitors C1 connected in series, or may be grounded through a plurality of capacitors C1 connected in parallel. In one example, as shown in fig. 2, each ground return point can be grounded through a capacitor C1 with a capacitance of 22pf, so as to reduce the circuit size of the first dc blocking circuit M1 and improve the flexibility of the circuit layout while ensuring that the whole conductive part of the first conductive part 110 is suspended. In the embodiment of the present application, by providing a plurality of ground return points on the first conductive part 110, the capacitance of the first conductive part 110 can be detected by connecting the detection circuit M2 to any ground return point, and the layout flexibility of the detection circuit M2 can be improved.

As shown in fig. 3, in one embodiment, the antenna assembly further includes a second conductive portion 120 forming a radiator, the second conductive portion 120 being spaced apart from the first conductive portion 110, and the area of the second conductive portion 120 being greater than the area of the first conductive portion 110. Since the area of the first conductive part 110 is smaller than that of the second conductive part 120, the capacitance value of the first conductive part 110 is smaller than that of the second conductive part 120 and the object under test under the condition that the relative state of the electronic device and the object under test is the same. Therefore, the capacitance value of the first conductive part 110 can be ensured to fall within the range of the measuring range of the detection circuit M2 in each relative state of the electronic device and the object to be detected, so that the detection data can accurately reflect the position condition or the motion condition between the electronic device and the object to be detected, the electronic device can adjust the transmission power according to the accurate detection data, the SAR value of the electronic device can meet the requirement of a relevant critical value, and the safety of the communication process is improved.

In one embodiment, the length of the first conductive part 110 is less than the length of the second conductive part 120, and the first conductive part 110 is used to form a first radiator, wherein the first radiator is used to radiate medium-high frequency rf signals. The second conductive part 120 is used to form a second radiator, and the second radiator is used to radiate low-frequency rf signals. Generally, in the case of radiating a low-frequency radio frequency signal, the SAR value of the electronic device is relatively low, and the number of times of power back-off is required is small. When radiating medium-high frequency radio frequency signals, the SAR value of electronic equipment is large, and the backspacing is often needed to be large. Therefore, the first conductive part 110 is used as the sensor in the SAR detection process, so that the SAR value of the electronic device in various application scenarios can meet the SAR threshold value requirement.

As shown in fig. 3, in one embodiment, the antenna assembly 10 may further include a metal floor 130, the metal floor 130 being used to form a system ground for the antenna assembly 10. For each element of the antenna assembly 10, if one element needs to be grounded, that element is connected to the metal ground 130. It is understood that the specific arrangement and arrangement position of the metal floor 130 can be determined according to the layout, routing and connection relationship of the antenna assembly 10 and/or the electronic device, and the present application does not limit this. In one example, a metal ground plane 130 may be provided on a printed circuit board for connection with the various elements of the antenna assembly 10. In the embodiment of the present application, the metal floor 130 provides a uniform and stable low level for each element of the antenna assembly 10, so as to reduce interference of external signals to each element on the one hand, and avoid interference and errors caused by different ground levels of each element on the other hand.

As shown in fig. 4, in one embodiment, the antenna assembly 10 further comprises a first feed 140 and a second dc blocking circuit M3, the first conductive part 110 further providing a first feed point. The first feed 140 is connected to the first feeding point through the second dc blocking circuit M3, and is configured to couple and feed a dc signal into the first conductive part 110, so as to form a first radiator on the first conductive part 110 for radiating a radio frequency signal. The second dc blocking circuit M3 is used for antenna matching and dc signal isolation to ensure that the whole conductive part of the first conductive part 110 is suspended. It is understood that the circuit elements and the circuit structure included in the second dc blocking circuit M3 can be determined according to the application requirements (such as the magnitude of the current output by the first feed 140, the circuit cost, the circuit volume and/or the accuracy of the detected data, etc.), and the application is not limited thereto. Fig. 5 shows a circuit schematic diagram of the second dc blocking circuit M3 in an example, as shown in fig. 5, the second dc blocking circuit M3 includes a capacitor C2, a capacitor C3 and a capacitor C4, the first feed 140 is connected to one end of the capacitor C2 and one end of the capacitor C3, respectively, the other end of the capacitor C3 is connected to one end of the capacitor C4 and the first feeding point, respectively, and the other end of the capacitor C2 and the other end of the capacitor C4 are both grounded. Thus, the second dc blocking circuit M3 can be connected to the first conductive part 110 through a dc blocking capacitor, thereby ensuring that the entire conductive part of the first conductive part 110 is floating.

In one embodiment, the antenna assembly 10 further comprises a second feed 150, the second conductive portion 120 being provided with a second feed point, the second feed point being located away from the first conductive portion 110. The second feed source 150 feeds a signal to the second conductive part 120 through a second feeding point, so as to form a second radiator for radiating the radio frequency signal on the second conductive part 120. Meanwhile, the antenna assembly 10 further includes a tuning circuit, one end of which is connected to the second conductive portion 120 and the other end of which is grounded. The tuning circuit is used to generate multiple resonant frequencies on the first conductive part 110 and the second conductive part 120 so that the antenna assembly 10 radiates radio frequency signals at different frequencies and supports multi-band wireless communication.

It is understood that the circuit composition of the tuning circuit, the circuit element parameters, the connection position between the tuning circuit and the second conductive part 120, the connection relationship, etc. may be determined according to the actual application requirements (such as the target resonant frequency and/or the impedance parameters of the conductive part, etc.), and the present application is not limited thereto. In one embodiment, as shown in fig. 6, the tuning circuit includes a first tuning module M4 and a second tuning module M5, wherein first tuning module M4 is connected to second conductive portion 120 for generating a first resonant frequency on first conductive portion 110 and second conductive portion 120 to cause antenna assembly 10 to radiate radio frequency signals at medium to high frequencies. A second tuning module M5 is connected to the second conductive part 120 for generating a second resonant frequency at the first conductive part 110 and the second conductive part 120 for causing the antenna assembly 10 to radiate radio frequency signals at a low frequency. Further, the connection position of the first tuning module M4 and the second conductive part 120 and the connection position of the second tuning module M5 and the second conductive part 120 can be determined according to practical application requirements, which is not specifically limited in this application. In this embodiment, the mode of the medium-high frequency is adjusted by the first tuning module M4, and the mode of the low frequency is adjusted by the second tuning module M5, so that the independence of the antenna assembly 10 can be improved and the mutual influence during radiation can be avoided.

In one embodiment, the first tuning module M4 includes a first switch unit 162 and a plurality of first tuning elements 164, wherein the first tuning elements 164 may be capacitors or inductors, and the device types and/or device parameters of any two first tuning elements 164 may be different. The first switch unit 162 is a medium-high frequency tuning switch, one end of which is grounded, a plurality of second ends of which are respectively connected to one ends of the plurality of first tuning elements 164 in a one-to-one correspondence manner, and the other end of each first tuning element 164 is connected to the second conductive part 120. By controlling the switching state of the first switching unit 162, the second conductive part 120 can be grounded through the different first tuning elements 164, and the resonant frequencies of the first conductive part 110 and the second conductive part 120 can be changed, so that the antenna assembly 10 radiates the medium-high frequency rf signal. It is understood that the number of the first tuning elements 164, the device type of each first tuning element 164, the device parameters, and the specific composition of the first switching unit 162 can be determined according to the actual application requirements, and the present application is not limited thereto. For example, the first switch unit 162 may include a plurality of single-pole single-throw switches (SPST), a first terminal of each single-pole single-throw switch is grounded, and a second terminal of each single-pole single-throw switch is connected to one terminal of each first tuning element 164 in a one-to-one correspondence manner. Fig. 7 shows a circuit schematic diagram of the first tuning module M4 in an example, as shown in fig. 7, the first tuning module M4 includes 4 first tuning elements 164, which are 3 capacitors and 1 inductor, respectively, and the first switch unit 162 includes 4 single-pole single-throw switches.

As shown in fig. 7, in one embodiment, the tuning circuit further includes a first inductor L1, one end of the first inductor L1 is connected to a second end of the first switch unit 162, and the other end of the first inductor L1 is grounded to filter the capacitance generated by the first switch unit 162. Since the capacitance change of the first switch unit 162 may affect the detection of the detection circuit M2, in this embodiment, the first inductor L1 is added to one end of the first switch unit 162 close to the second conductive part 120 (i.e., the second end of the first switch unit 162), so as to filter the capacitance generated by the first switch unit 162 and prevent the switched capacitance from affecting the detection of the detection circuit M2. Further, a first inductor L1 may be connected to the second end of the first switch unit 162 connected to the inductance tuning element to improve the filtering effect.

In one embodiment, the second tuning module M5 includes a second switch unit 166 and a plurality of second tuning elements 168, wherein the second tuning elements 168 may be capacitors or inductors, and the device types and/or device parameters of any two second tuning elements 168 may be different. The second switch unit 166 is a low frequency tuning switch, one end of which is grounded, a plurality of second ends of which are respectively connected to one ends of the plurality of second tuning elements 168 in a one-to-one correspondence, and the other end of each second tuning element 168 is connected to the second conductive part 120. By controlling the switching state of the second switching unit 166, the second conductive part 120 can be grounded through the different second tuning elements 168, and the resonant frequency of the first conductive part 110 and the second conductive part 120 can be changed, so that the antenna assembly 10 radiates the low-frequency rf signal. It is understood that the number of the second tuning elements 168, the device type of each second tuning element 168, the device parameters, and the specific composition of the second switching unit 166 can be determined according to the actual application requirements, and the present application is not limited thereto. Fig. 8 shows a circuit schematic diagram of the second tuning module M5 in an example, as shown in fig. 8, the second tuning module M5 includes 4 second tuning elements 168, each having 3 inductors and 1 capacitor, the second switch unit 166 is a single-pole four-throw switch (SP4T), a first end of the single-pole four-throw switch is grounded, second ends of the single-pole four-throw switch are respectively connected to one end of each second tuning element 168 in a one-to-one correspondence manner, and the other end of each second tuning element 168 is grounded.

As shown in fig. 8, in one embodiment, the tuning circuit further includes a second inductor L2, and one end of the second inductor L2 is connected to a second end of the second switch unit 166 to filter the capacitance generated by the second switch unit 166. Since the capacitance change of the second switch unit 166 may affect the detection of the detection circuit M2, in this embodiment, the second inductor L2 is added to one end of the second switch unit 166 close to the second conductive part 120 (i.e., the second end of the second switch unit 166), so as to filter the capacitance generated by the second switch unit 166 and prevent the capacitance from affecting the detection of the detection circuit M2. Further, a second inductor L2 may be connected to the second end of the second switch unit 166 connected to the inductance tuning element to improve the filtering effect.

As shown in fig. 6, in one embodiment, the antenna assembly 10 further includes a band pass filter circuit M6, the band pass filter circuit M6 being connected between the second feed 150 and the second feed point for filtering out medium and high frequency signals. It is understood that the circuit composition, the circuit response, and the like of the band-pass filter circuit M6 can be determined according to the requirements of the practical application (such as the pass-band frequency and the stop-band frequency, and the like), and the present application does not specifically limit this. Illustratively, the circuit structure of the band-pass filter circuit M6 may be as shown in fig. 9, and include an inductor L3, an inductor L4, a capacitor C5, and a capacitor C6, where one end of the inductor L3 is connected to one end of the capacitor C5, and the other end of the capacitor C5 is grounded. The other end of the inductor L3 is connected to one end of the second feed 150 and one end of the inductor L4, respectively, the other end of the inductor L4 is connected to one end of the capacitor C6, and the other end of the capacitor C6 is connected to the second feeding point. In this embodiment, the band-pass filter circuit M6 is provided between the second feed 150 and the second feed point, so that the middle and high frequency signals can be filtered.

In one embodiment, the detection circuit M2 includes the SAR sensor 170 and a decoupling module connected in series, the decoupling module being connected back to the site. Because the frequency of the radio frequency signal radiated by the first radiator is high and the operating frequency of the SAR sensor 170 is low, in order to prevent the radio frequency signal radiated by the first radiator from affecting the operation of the SAR sensor 170, a decoupling module may be disposed between the SAR sensor 170 and the return point to isolate the radio frequency signal radiated by the first radiator, thereby improving the accuracy of the detection data. It is understood that the circuit composition of the decoupling module and the device type of the SAR sensor 170 may depend on the actual application requirements (e.g., the frequency of the radio frequency signal, etc.). Illustratively, as shown in fig. 10, the decoupling module may be an inductor L5, one end of the inductor L5 is connected back to the ground point and one end of the capacitor C1, respectively, and the other end of the inductor L5 is connected to the SAR sensor 170, wherein the SAR sensor 170 may be a distance sensor for detecting a relative distance between the electronic device and the object to be measured.

As shown in fig. 11, the present embodiment provides an electronic device, which includes an antenna assembly 10, a conductive bezel 20, and a substrate, wherein a first conductive portion 110 is formed on the conductive bezel 20, the substrate is disposed in a cavity enclosed by the conductive bezel 20, and a first dc blocking circuit M1 and a detection circuit M2 are disposed on the substrate. Further, a metal floor 130, a tuning circuit, a second dc blocking circuit M3, and/or a band pass filter circuit M6 may also be disposed on the substrate. In one embodiment, the conductive bezel 20 is a metal bezel.

As shown in fig. 12, in one embodiment, the conductive bezel includes a first conductive bezel 210 and a second conductive bezel 220 disposed adjacently, and corner portions for connecting the first conductive bezel 210 and the second conductive bezel 220. The first conductive frame 210 has a first gap F1, and the first gap F1 divides the conductive frame into a first conductive portion 110 and a second conductive portion 120 disposed at an interval. It is understood that the opening position of the first slit F1 may be determined according to the target length of the first conductive part 110 and the target shape of the first conductive part 110, and the application is not particularly limited thereto. In one example, The first slot F1 may be located in a middle region of The first conductive bezel 210, so that The overall amplitude of The antenna assembly 10 may be reduced when The electronic device is held, and The improvement to The operator's one-hand and head OTA (Over The Air) specifications may be significant. Fig. 13 shows one embodiment of the present example, and as shown in fig. 13, the electronic device includes a USB interface 30 and a speaker 40, wherein the USB interface 30 is disposed near the first conductive bezel 210, and the first gap F1 may be disposed near the USB interface 30.

The second conductive frame 220 defines a second gap F2, and the conductive frame between the first gap F1 and the second gap F2 forms the first conductive portion 110. When the first conductive section 110 has a plurality of return points, any return point is disposed near the second slit F2. At this time, the first conductive part 110 between the return point closest to the first slot F1 and the return point closest to the second slot F2 (i.e., the target return point) can be regarded as a whole, and the first conductive part 110 between the target return point and the second slot F2 can reinforce the rf signals on the first radiator and the second radiator, so that a new radiation mode can be generated and the high-frequency radiation efficiency can be improved. Meanwhile, since the first conductive part 110 is located at the first conductive frame 210, the second conductive frame 220 and the corner part, SAR detection can be performed on at least 4 surfaces, which not only improves the comprehensiveness of detection, but also meets the requirements of relevant regulations.

As shown in fig. 12, in one embodiment, the conductive bezel further includes a third conductive bezel 230, and the third conductive bezel 230 is disposed adjacent to the first conductive bezel 210 and opposite to the second conductive bezel 220. The third conductive frame 230 has a third gap F3, and the conductive frame between the third gap F3 and the first gap F1 forms the second conductive portion 120. In this way, a new low frequency module can be generated and the low frequency radiation performance can be improved by the first conductive part 110 between the target return point and the second gap F2.

In one embodiment, the first feeding point is disposed near the first slot F1 and the return point is disposed away from the first slot F1. In the case where the number of return points is plural, each return point is disposed away from the first slit F1. Thus, when the first feed source 140 is coupled to feed a dc signal, the first conductive part 110 forms a first radiator, and radiates a radio frequency signal through the first radiator, so as to implement wireless communication.

In one embodiment, a first tuning module M4 is connected to an end of the second conductive portion 120 near the first slot F1, and a second tuning module M5 is connected to an end of the second conductive portion 120 away from the first slot F1.

As shown in fig. 14, fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include components such as an antenna assembly 10, a memory 350 including one or more computer-readable storage media, an input unit 380, a display unit 370, a sensor 360, an audio circuit 330, a Wireless Fidelity (WiFi) module 320, a processor 310 including one or more processing cores, and a power supply 340. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 11 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The antenna assembly 10 may be used for transmitting and receiving information, or receiving and transmitting signals during a call, and in particular, receive downlink information of a base station and then send the received downlink information to the one or more processors 310 for processing; in addition, data relating to uplink is transmitted to the base station. In general, the antenna assembly 10 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. The antenna assembly 10 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

Memory 350 may be used to store applications and data. Memory 350 stores applications containing executable code. The application programs may constitute various functional modules. The processor 310 executes various functional applications and data processing by executing application programs stored in the memory 350. The memory 350 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the electronic device, and the like. Further, the memory 350 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 350 may also include a memory controller to provide the processor 310 and the input unit 380 access to the memory 350.

The input unit 380 may be used to receive input numbers, character information, or user characteristic information, such as a fingerprint, and generate a keyboard, mouse, joystick, optical, or trackball signal input related to user setting and function control. In particular, in one particular embodiment, input unit 380 may include a touch-sensitive surface 381 as well as other input devices 382. Touch-sensitive surface 381, also referred to as a touch screen or touch pad, may collect touch operations by a user on or near the touch-sensitive surface (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment), and drive the corresponding connection device according to a predetermined program. Alternatively, touch-sensitive surface 381 may include both touch sensing devices and touch controllers. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 310, and can receive and execute commands sent by the processor 310.

The display unit 370 may be used to display information input by or provided to the user and various graphical user interfaces of the electronic device, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 370 may include a display panel 371. Alternatively, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 310 to determine the type of the touch event, and then the processor 310 provides a corresponding visual output on the display panel according to the type of the touch event. Although in FIG. 11 the touch-sensitive surface and the display panel are two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions. It is understood that the display screen may include an input unit 380 and a display unit 370.

The electronic device may also include at least one sensor 360, such as light sensors, motion sensors, and other sensors. In particular, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the electronic device is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured to the electronic device, detailed descriptions thereof are omitted.

Audio circuitry 330 may provide an audio interface between a user and the electronic device through speaker 40331 and microphone 332. The audio circuit 330 may convert the received audio data into an electrical signal, transmit the electrical signal to the speaker 40331, and convert the electrical signal into an acoustic signal for output by the speaker 40331; on the other hand, the microphone 332 converts the collected sound signal into an electrical signal, which is received by the audio circuit 330 and converted into audio data, which is then processed by the audio data output processor 310 and then sent to another electronic device via the rf circuit 501, or output to the memory 350 for further processing. The audio circuitry 330 may also include an earphone jack to provide communication of a peripheral earphone with the electronic device.

Wireless fidelity (WiFi) belongs to short-range wireless transmission technology, and the electronic device can help the user send and receive e-mail, browse web pages, access streaming media and the like through the wireless fidelity module 320, and provides wireless broadband internet access for the user. Although fig. 11 shows the wireless fidelity module 320, it is understood that it does not belong to the essential constitution of the electronic device, and may be omitted entirely as needed within the scope not changing the essence of the inventive concept.

The processor 310 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by running or executing an application program stored in the memory 350 and calling data stored in the memory 350, thereby integrally monitoring the electronic device. Optionally, processor 310 may include one or more processing cores; preferably, the processor 310 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 310.

The electronic device also includes a power supply 340 that provides power to the various components. Preferably, the power source 340 may be logically connected to the processor 310 through a power management system, so as to implement functions of managing charging, discharging, and power consumption management through the power management system. The power supply 340 may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.

Although not shown in fig. 11, the electronic device may further include a bluetooth module or the like, which is not described herein. In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An antenna assembly, comprising:

the first DC blocking circuit is used for isolating the DC signal;

2. The antenna assembly of claim 1, wherein the first dc blocking circuit comprises a plurality of capacitors;

the number of the return points is multiple, each return point is grounded through the capacitor, and any return point is connected with the detection circuit.

3. The antenna assembly of claim 1, further comprising a second conductive portion forming the radiator, the second conductive portion being spaced apart from the first conductive portion, and the second conductive portion having an area greater than an area of the first conductive portion.

4. An antenna assembly according to claim 3, further comprising a first feed and a second dc blocking circuit, the first conductive portion further providing a first feed point;

the first feed source is connected with the first feed point through the second dc blocking circuit, and is configured to feed a dc signal into the first conductive part in a coupling manner, so as to form a first radiator for radiating a radio frequency signal on the first conductive part.

5. The antenna assembly of claim 4, further comprising a second feed and a tuning circuit, the second conductive portion providing a second feed point, the second feed point being disposed away from the first conductive portion;

the second feed source feeds a signal into the second conductive part through the second feed point so as to form a second radiator for radiating a radio frequency signal on the second conductive part;

one end of the tuning circuit is connected with the second conductive part, and the other end of the tuning circuit is grounded; wherein the tuning circuit is to generate a plurality of resonant frequencies on the first and second conductive portions.

6. The antenna assembly of claim 5, wherein the tuning circuit comprises a first tuning module and a second tuning module, wherein:

the first tuning module is configured to generate a first resonant frequency on the first conductive portion and the second conductive portion such that the antenna assembly radiates radio frequency signals at medium-high frequencies;

the second tuning module is configured to generate a second resonant frequency on the first conductive portion and the second conductive portion to cause the antenna assembly to radiate radio frequency signals at a low frequency.

7. The antenna assembly of claim 6, wherein the first tuning module comprises a first switching unit and a plurality of first tuning elements;

the first end of the first switch unit is grounded, a plurality of second ends of the first switch unit are respectively connected with the plurality of first tuning elements in a one-to-one correspondence mode, and each first tuning element is connected with the second conductive part.

8. The antenna assembly of claim 7, wherein the tuning circuit further comprises a first inductor connected between a second terminal of the first switching unit and ground for filtering out capacitance generated by the first switching unit.

9. The antenna assembly of claim 6, wherein the second tuning module comprises a second switching unit and a plurality of second tuning elements;

the first end of the second switch unit is grounded, a plurality of second ends of the second switch unit are respectively connected with the plurality of second tuning elements in a one-to-one correspondence manner, and each second tuning element is connected with the second conductive part.

10. The antenna assembly of claim 9, wherein the tuning circuit further comprises a second inductor connected between a second terminal of the second switching unit and ground for filtering out capacitance generated by the second switching unit.

11. The antenna assembly of any one of claims 5 to 10, further comprising a band pass filter circuit connected between the second feed and the second feed point.

12. The antenna assembly of any one of claims 4 to 10, wherein the detection circuit comprises a decoupling module and a SAR sensor;

the decoupling module is respectively connected with the SAR sensor and the return point and used for isolating the radio-frequency signal radiated by the first radiator.

13. The antenna assembly of any one of claims 1 to 10, wherein the first conductive portion is an L-shaped structure.

14. The antenna assembly of any one of claims 1 to 10, further comprising a metal floor forming a system ground for the antenna assembly.

15. An electronic device, comprising:

an antenna assembly as claimed in any one of claims 1 to 14;

the first conductive part is formed on the conductive frame;

16. The electronic device of claim 15, wherein the conductive bezel comprises a first conductive bezel and a second conductive bezel disposed adjacently, and corner portions for connecting the first conductive bezel and the second conductive bezel;

the first conductive frame is provided with a first gap, and the first gap divides the conductive frame into a first conductive part and a second conductive part;

the second conductive frame is provided with a second gap, and the conductive frame between the second gap and the first gap forms the first conductive part;

the number of the return points is multiple, and any return point is arranged close to the second gap.

17. The electronic device of claim 16, wherein the conductive bezel further comprises a third conductive bezel disposed adjacent to the first conductive bezel and disposed opposite the second conductive bezel;

the third conductive frame is provided with a third gap, and the conductive frame between the third gap and the first gap forms the second conductive part.

18. The electronic device of claim 16, wherein a first feed point is disposed proximate to the first slot and the return point is disposed distal to the first slot.