CN115483531A - Electronic device - Google Patents

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Publication number
CN115483531A
CN115483531A CN202211098152.0A CN202211098152A CN115483531A CN 115483531 A CN115483531 A CN 115483531A CN 202211098152 A CN202211098152 A CN 202211098152A CN 115483531 A CN115483531 A CN 115483531A
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CN
China
Prior art keywords
frequency band
point
branch
detection
electronic device
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Pending
Application number
CN202211098152.0A
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Chinese (zh)
Inventor
罗智杰
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202211098152.0A priority Critical patent/CN115483531A/en
Publication of CN115483531A publication Critical patent/CN115483531A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands

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Abstract

The application discloses electronic equipment includes: an antenna assembly: the first branch section is provided with a first feed point; the second branch is opposite to the first branch and forms a gap, the second branch is provided with a second feeding point and a detection connection point, and the second feeding point is positioned on one side of the detection connection point, which is far away from the first branch; the first feed source is connected with the first feed point and used for feeding an excitation signal of a first frequency band into the first branch section; the second feed source is connected with the second feed point and used for feeding an excitation signal of a second frequency band into the second branch knot, and the first frequency band and the second frequency band comprise at least partially overlapped frequency bands; a detection component: the detection chip is used for detecting a detection signal of a third frequency band sensed by the second branch knot; and a filter circuit that forms a low impedance characteristic to ground for signals of the overlapped frequency bands and a high impedance characteristic to ground for the detection signal. The isolation of the signals of the overlapped frequency bands corresponding to the first feed source and the second feed source can be improved.

Description

Electronic device
Technical Field
The present application relates to the field of communications technologies, and in particular, to an electronic device.
Background
At present, with the rapid development of electronic information technology, more and more frequency bands can be supported by an antenna of an electronic device, and people also need to control the radiation power of the electronic device. Although, the distance between the human body and the electronic device can be detected by the detection component, and the radiation power of the electronic device can be controlled. However, the connection detection assembly easily causes mutual interference between overlapping frequency bands of multiple feeding sources, resulting in poor isolation of the overlapping frequency bands of the feeding sources.
Disclosure of Invention
The present application proposes an electronic device to improve the above-mentioned drawbacks.
In a first aspect, an embodiment of the present application provides an electronic device, including: the antenna assembly comprises a first branch knot, wherein the first branch knot is provided with a first feed point; the second branch knot is opposite to the first branch knot and is provided with a gap, the second branch knot is provided with a second feeding point and a detection connection point, and the second feeding point is positioned on one side of the detection connection point, which is far away from the first branch knot; the first feed source is connected with the first feed point and used for feeding an excitation signal of a first frequency band into the first branch node so as to excite the first branch node to form resonance of the first frequency band; the second feeding source is connected with the second feeding point and used for feeding an excitation signal of a second frequency band into the second branch node so as to excite the second branch node to form resonance of the second frequency band, wherein the first frequency band and the second frequency band comprise at least partially overlapped frequency bands; the detection assembly comprises a detection chip and a detection module, wherein the detection chip is used for detecting a detection signal of a third frequency band sensed by the second branch knot; and the filter circuit is connected between the detection chip and the detection connection point and is grounded, and the filter circuit forms low impedance characteristics to the ground for the signals of the overlapped frequency band and forms high impedance characteristics to the ground for the detection signals.
The application provides an electronic device, including: the detection assembly comprises a detection chip and a filter circuit, wherein the first feed source is connected with the first feed point and is used for feeding an excitation signal of a first frequency band to the first branch so as to excite the first branch to form resonance of the first frequency band; the second feeding source is connected with the second feeding point and used for feeding an excitation signal of a second frequency band into the second branch node so as to excite the second branch node to form resonance of the second frequency band, wherein the first frequency band and the second frequency band comprise at least partially overlapped frequency bands; and the filter circuit is connected between the detection chip and the detection connection point and is grounded, and the filter circuit forms low impedance characteristics to the ground for the signals of the overlapped frequency band and forms high impedance characteristics to the ground for the detection signals. The excitation signal of the first frequency band fed into the first branch by the first feeding source and the excitation signal of the second frequency band fed into the second branch by the second feeding source comprise at least partially overlapped frequency bands, and the excitation signals of the overlapped frequency bands are easy to interfere with each other, so that the isolation degree of the first feeding source and the second feeding source corresponding to the overlapped frequency bands is reduced. Therefore, this application is right through filter circuit the signal of overlapping frequency channel forms the low impedance characteristic to ground, makes the signal of overlapping frequency channel can pass through filter circuit ground connection, can reduce the mutual interference that improves the signal of overlapping frequency channel to a certain extent, and then improves the isolation of the signal of the overlapping frequency channel that first feeder and second feeder correspond.
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 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application;
FIG. 2 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by an embodiment of the present application;
FIG. 3 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by yet another embodiment of the present application;
FIG. 4 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by yet another embodiment of the present application;
FIG. 5 illustrates a schematic structural diagram of an antenna assembly and a detection assembly provided by yet another embodiment of the present application;
FIG. 6 is a diagram illustrating resonance points provided by an embodiment of the present application;
FIG. 7 illustrates a schematic isolation diagram provided by an embodiment of the present application;
FIG. 8 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by another embodiment of the present application;
FIG. 9 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by another embodiment of the present application;
FIG. 10 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by another embodiment of the present application;
FIG. 11 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by another embodiment of the present application;
FIG. 12 shows a schematic structural diagram of an antenna assembly and a detection assembly provided by another embodiment of the present application;
FIG. 13 illustrates a schematic diagram of resonance points provided by yet another embodiment of the present application;
FIG. 14 illustrates a schematic view of isolation provided by yet another embodiment of the present application;
FIG. 15 shows a graphical illustration of the radiation efficiency provided by an embodiment of the present application;
fig. 16 shows a schematic structural diagram of an antenna assembly and a detection assembly provided in another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
At present, with the rapid development of electronic information technology, more and more frequency bands can be supported by an antenna of an electronic device, and people also need to control the radiation power of the electronic device. Although, the distance between the human body and the electronic device can be detected by the detection component, and the radiation power of the electronic device can be controlled. However, the connection of the detecting components may cause mutual interference between the antennas, which may result in poor isolation between the antennas. How to improve the isolation between the antennas is a problem to be solved urgently.
At present, electronic equipment generally has a plurality of feed sources, and the electronic equipment can use a metal frame as an antenna branch, so that the feed sources can radiate signals through the antenna branch. Specifically, the feed source may be configured to generate an excitation signal in a specified frequency band, and feed the excitation signal into the antenna branch, so that the antenna branch generates resonance based on the specified frequency band, and further generates an electromagnetic wave capable of being transmitted in space, that is, the antenna branch may radiate a wireless communication signal based on the resonance, where the frequency band of the wireless communication signal is the same as the specified frequency band. The designated band may be a band, for example, including a mid-frequency MB (MB) band, an N78 band number, or an N79 band; the designated frequency band may also be more than one frequency band, including, for example, the mid-range MB frequency band and the N78 frequency band. Further, the designated frequency bands of the excitation signals generated by the different feeding sources may not be overlapped, for example, the designated frequency band of the excitation signal generated by the feeding source 1 may be an intermediate frequency MB frequency band, and the designated frequency band of the excitation signal generated by the feeding source 2 may be an N78 frequency band, so that the frequency bands of the excitation signals generated by the feeding source 1 and the feeding source 2 do not overlap each other at this time. For example, the designated frequency bands of the excitation signals generated by the feeding source 1 may include an intermediate frequency MB frequency band and an N78 frequency band, and the designated frequency bands of the excitation signals generated by the feeding source 2 may include an N78 frequency band, so that the designated frequency bands of the excitation signals generated by the feeding source 1 and the feeding source 2 overlap at the N78 frequency band, that is, partially overlap.
Furthermore, in order to obtain the distance between the electronic device and the human body, the transmitting power of the electronic device can be adjusted through the distance between the electronic device and the human body, and the influence on the human body is reduced. The antenna branch can be connected with a detection component for detecting the human body in a certain position, and the distance between the human body and the electronic equipment can be detected through the detection component.
However, the inventor has found in the research that the detection component needs to suspend the connected antenna branches to improve the detection sensitivity. However, the suspension of the antenna branches can reduce the isolation between the overlapped frequency bands of the excitation signals generated by different feed sources.
Accordingly, the present application provides an electronic device to solve or partially solve the above-mentioned problems. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows an electronic device 100, where the electronic device 100 includes a front case 110 and a rear cover 120, and a middle plate 150. The middle plate 150 may be enclosed in the frame 105, and the middle plate 150 may be connected to the frame 105. Middle plate 150 includes a first side and a second side opposite to each other, rear cover 120 is mounted on the first side of middle plate 150, front shell 110 is mounted on the second side of middle plate 150, specifically, front shell 110 and rear cover 120 are mounted within bezel 105 and form a closed housing assembly 190, and front shell 110 may include display screen 160. The front case 110 and the rear cover 120 together enclose a receiving space to receive other constituent elements, such as the main board 170 and the battery 180.
Further, the electronic device 100 may further include an antenna assembly (250 in fig. 2) and a detection assembly (205 in fig. 2), wherein the antenna assembly 250 may generate an excitation signal of a specified frequency band and generate resonance based on the excitation signal, thereby generating an electromagnetic wave signal that may be transmitted in space, i.e., a wireless communication signal. The frequency of the wireless communication signal is related to the excitation signal of a specific frequency band, so the wireless communication signal may have different frequencies, that is, the wireless communication signal may include signals of different frequency bands, for example, signals of a low frequency (LowerBand, LB) band, signals of an intermediate frequency (MB) band, and signals of a high frequency (HighBand, HB) band. Further, the wireless communication signal may also have different communication modes, for example, the wireless communication signal may be a global system for mobile communications GSM, may also be long term evolution LTE, and may also be a new air interface 5GNR. The detection component 205 can be configured to detect a sensed detection signal of the third frequency band. For a detailed description of the antenna assembly 250 and the detection assembly 205, please refer to the following embodiments.
For some embodiments, the front housing 110 and the back cover 120 may be metal housings. It should be noted that the material of the front shell 110 and the rear cover 120 in the embodiment of the present application is not limited thereto, and other manners may also be adopted, such as: the front case 110 and the rear cover 120 may include a plastic part and a metal part. For another example: the front case 110 and the rear cover 120 may be a plastic case, a ceramic case, or the like. The protective cover plate can be a glass cover plate, a sapphire cover plate, a plastic cover plate and the like, and provides a protective effect for the display screen 160 so as to prevent dust, water vapor or oil stains and the like from being attached to the display screen, avoid the corrosion of the external environment to the display screen 160, prevent the impact force of the external environment to the display screen 160 and avoid the breakage of the display screen 160. The protective cover may include a display area and a non-display area. The display area is transparent and corresponds to the light-emitting surface of the display screen 160. The non-display area is non-transparent to shield the internal structure of the electronic device 100. The non-display area may be provided with openings for sound and light transmission.
It should be noted that the electronic device 100 according to the embodiment of the present application may also be designed as a full screen without reserving the non-display area. The electronic device 100 may be provided with an earphone hole, a microphone hole, a speaker hole, a universal serial bus interface hole at its periphery. The earphone hole, the microphone hole, the loudspeaker hole and the universal serial bus interface hole are all through holes, are formed on the frame and can be electrically connected with the mainboard 170 in the accommodating space.
For some embodiments, the electronic device 100 may be a mobile phone or smart phone, a portable gaming device, a laptop, a PDA, a portable internet appliance, a music player, and data storage device, other handheld devices, and devices such as a watch, an earpiece, a pendant, an earpiece, etc., and the electronic device 100 may also be other wearable devices (e.g., a Head Mounted Device (HMD) such as electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic tattoo, a smart watch).
In the embodiment of the present application, the following manner may be adopted to arrange on the electronic device, specifically, please refer to fig. 2, where fig. 2 shows a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in the electronic device 100. The antenna assembly 250 can generate an excitation signal of a designated frequency band and generate resonance based on the excitation signal, thereby generating an electromagnetic wave signal that can be transmitted in space, i.e., a wireless communication signal. The detection component 205 may be configured to detect a sensed detection signal of the third frequency band.
For some embodiments, the antenna assembly 250 may include a first leg 201, a second leg 202, a first feed 203, and a second feed 204. The first branch 201 is provided with a first feeding point 281, the first feeding source 203 may be connected to the first feeding point 281, and the first branch 201 may be a metal conductor. The first feeding source 203 in the antenna assembly 250 may generate an excitation signal of the first frequency band, and feed the excitation signal of the first frequency band to the first stub 201 through the first feeding point 281, so as to excite the first stub 201 to form a resonance of the first frequency band. The first branch 201 may generate an electromagnetic wave that may propagate freely in space based on the resonance of the first frequency band, that is, a wireless communication signal, which may be a wireless communication signal of the first frequency band.
Further, the second branch 202 is opposite to the first branch 201 and is formed with a gap 206, the second branch 202 is provided with a second feeding point 2022 and a detection connection point 2021, the second feeding point 2022 is located on a side of the detection connection point 2021 far from the first branch 201, and the second branch 202 may be a metal conductor. The second feeding source 204 in the antenna component 250 is connected to the second feeding point 2022. The second feeding source 204 can generate an excitation signal of the second frequency band, and feed the excitation signal of the second frequency band to the second branch 202 through the second feeding point 2022, so as to excite the second branch 202 to form a resonance of the second frequency band. The second branch 201 may generate an electromagnetic wave that may propagate freely in space, i.e., a wireless communication signal, based on the resonance of the second frequency band, which may be a wireless communication signal of the second frequency band. The first frequency band and the second frequency band at least include partially overlapping frequency bands, for example, the first frequency band includes a middle and high frequency (MHB) frequency band and an ultrahigh frequency (uhf) frequency band, and the second frequency band includes an uhf frequency band; the overlapping band may be the uhf band, for example the N78 band. The frequency band corresponding to the N78 is 3400-3600MHz, and the middle-high frequency band is 1000MHz-3000MHz.
For some embodiments, the detecting component 205 is used to detect a distance between a subject to be detected and the electronic device 100, where the subject to be detected may be a human body or a part of a human body, such as a head, a body, a hand, or a leg of a human body.
It is understood that the surface of the subject to be detected may form a magnetic field due to the skin surface of the subject to be detected being charged. When the main body to be detected is close to the second branch 202, it may be equivalent to placing the second branch 202 in the magnetic field formed by the main body to be detected, at this time, since the second branch 202 is a metal conductor, the second branch 202 may generate an induced current, which is a detection signal received by the second branch 202. It is easy to understand that, since the second branch 202 induces the induced current in the magnetic field generated by the to-be-detected main body, it can be known that the closer the to-be-detected main body is to the second branch 202, the stronger the magnetic field of the second branch 202 is, and the stronger the induced current is; the farther the distance between the main body to be detected and the second branch 202 is, the weaker the magnetic field of the second branch 202 is, and the weaker the induced current is. Therefore, the detection component connected to the second branch 202 can obtain the detection signal of the third frequency band, i.e., the induced current, so as to determine the distance between the main body to be detected and the electronic device according to the magnitude of the induced current. It should be noted that, since the second branch is disposed in the electronic device 200, the distance between the to-be-detected body determined by the second branch 202 and the second branch 202 can be approximately used as the distance between the electronic device 200 and the to-be-detected body.
Specifically, the detection component 205 may include a detection chip 2051, and the detection chip 2051 may be connected to the second branch 202. The detection chip 2051 may include an input end 2053, and the detection chip 2051 may be connected to the detection connection point 2021 through the input end 2053, and is configured to detect a detection signal of the third frequency band, which is sensed by the second branch 202. The second stub 202 may generate a detection signal of a third frequency band based on the distance between the main body to be detected and the electronic device 100, and the detection component 205 connected to the second stub 202 may acquire the detection signal of the third frequency band, so as to determine the distance between the main body to be detected and the electronic device 100 based on the detection signal of the third frequency band. As an example, the detection chip 2051 may be an electromagnetic Absorption Rate (SAR) detector.
Further, it can be known from the above analysis that the detection signal is an induced current generated by the magnetic field of the main body to be detected, and the frequency of the induced current is related to the magnetic field direction, and the magnetic field direction of the main body to be detected changes slowly, so that it is easy to know that the frequency of the induced current is low, that is, the third frequency band corresponds to the frequency band with low frequency. Moreover, if the second branch 202 is suspended with respect to the reference ground, that is, the second branch is not directly connected to the reference ground, most of the detection signals acquired by the second branch can be fed into the detection assembly 205 without being fed into the reference ground, so that the sensitivity of the second branch to the detection signals can be improved, and the sensitivity of acquiring the distance between the electronic device 200 and the subject to be detected can be improved. Therefore, the detecting component 205 can further include a filter circuit 2052, wherein the filter circuit 2052 is connected between the detecting chip 2051 and the detecting connection point 2022, i.e. between the input 2053 and the detecting point 2022, and is grounded. As can be seen from the above analysis, the detection signal is a signal with a lower frequency, and the frequency band corresponding to the detection signal includes a third frequency band, the filter circuit 2052 can form a characteristic of high impedance to ground for the signal in the third frequency band, so that most of the detection signal acquired by the second stub can be fed into the detection element 205 without being fed into the reference ground. Therefore, the filter circuit 2052 forms a low impedance characteristic to ground for the signal of the overlapped band and forms a high impedance characteristic to ground for the detection signal. Therefore, the sensitivity of obtaining the distance between the electronic device 100 and the main body to be detected can be improved, and meanwhile, the signals of the overlapped frequency bands are grounded through the filter circuit 2052, so that the mutual interference of the signals of the overlapped frequency bands is reduced to a certain extent, and further the isolation of the signals of the overlapped frequency bands corresponding to the first feed source and the second feed source is improved.
It is understood that, if a plurality of feeding sources are provided in the electronic device 100, if there are overlapping frequency bands between the frequency bands corresponding to the excitation signals generated by the feeding sources, coupling may occur between different feeding sources, and thus the isolation between different feeding sources is reduced. For example, if the electronic device is provided with a power supply a and a power supply B, wherein the power supply a is used for generating the excitation signals with the frequency bands X and Y, and the power supply B is used for generating the excitation signals with the frequency band X, both the power supply a and the power supply B may generate the excitation signals with the frequency band X. At this time, if the excitation signal of the frequency band X generated by the feed source a is coupled into the feed source B, and the excitation signal of the frequency band X generated by the feed source B is coupled into the feed source a, coupling will be generated between the feed source a and the feed source B, and the isolation between the feed source a and the feed source B is reduced.
Therefore, with continued reference to fig. 2, a gap 206 exists between the first branch 201 and the second branch 202. The first feeding source 203 may generate an excitation signal of a first frequency band, and the excitation signal of the first frequency band may generate resonance in the first branch 201 after being fed into the first branch 201. For some embodiments, the gap 206 may be considered an equivalent capacitance, and different distances of the gap 206 may result in different capacitance values. Thus, the excitation signal of the first frequency band may also be coupled to the second stub 202 through the slot 206. At this time, if there is a partial overlapping frequency band in the excitation signal of the second frequency band generated by the second power supply 204 connected to the second stub 202 and the excitation signal of the first frequency band, the excitation signal in the overlapping frequency band in the excitation signal of the first frequency band coupled to the second stub 202 through the slot 206 will be partially fed into the second power supply 204, so that the efficiency of the first power supply 203 generating the excitation signal of the first frequency band is reduced, and the efficiency of the first stub 201 radiating the wireless communication signal of the first frequency band is further reduced.
Similarly, the second feeding source 204 may generate an excitation signal of a second frequency band, and the excitation signal of the second frequency band may generate resonance in the second branch 202 after being fed into the second branch 202. Therefore, the excitation signal of the second frequency band may also be coupled to the first stub 201 through the slot 206. At this time, some of the excitation signals in the overlapped frequency band in the excitation signals in the second frequency band coupled to the first stub 201 through the slot 206 are fed into the first power feed 203, so that the efficiency of the second power feed 204 generating the excitation signals in the second frequency band is reduced, and the efficiency of the second stub 202 radiating the wireless communication signals in the second frequency band is further reduced.
For the embodiment provided by the present application, when the first feeding source 203 radiates the wireless communication signal of the first frequency band through the first branch 201, the second branch 202 may further couple to the wireless communication signal of the first frequency band, and the wireless communication signal of the first frequency band may be coupled to the second branch 202 to obtain the signal of the first frequency band. For example, if the first frequency band is an N78 frequency band, that is, the signal of the first frequency band coupled by the second branch 202 is also the N78 frequency band, and the N78 frequency band is the same as the second frequency band of the excitation signal of the second frequency band generated by the second power supply 204, that is, at this time, a part of the signal of the first frequency band is fed into the second power supply 204. Similarly, the second branch 202 may also be coupled to a wireless communication signal in a second frequency band, and the wireless communication signal in the second frequency band may be coupled to the second branch 202 to obtain a signal in the second frequency band. Specifically, the second branch 202 radiates the wireless communication signal of the second frequency band through the detection connection point 2021 to the branch corresponding to the end of the second branch 202 away from the first branch 201, so that the wireless communication signal of the second frequency band can be coupled to the branch corresponding to the detection connection point 2021 from the end of the second branch 202 facing the first branch 201 to generate the signal of the second frequency band, and then coupled to the first branch 201 through the slot 206. Therefore, coupling is formed between the first feeding source 203 and the second feeding source 204, resulting in a low isolation between the first feeding source 203 and the second feeding source 204.
The wireless communication signal of the first frequency band may be coupled to the second branch 202 through a first coupling path, and the first coupling path may be the wireless communication signal of the first frequency band coupled to the second branch 202 through a transmission medium. The transmission medium may be one or more of air, a dielectric substrate, a floor, a ground layer, and the like. The second branch 202 may further be coupled to a second coupling path, where the second coupling path may be configured to couple a wireless communication signal in the first frequency band to the second branch 202 through a gap 206 existing between the first branch 201 and the first end of the second branch 202. Similarly, the manner in which the second wireless communication signal is coupled to the first branch 201 is similar to the manner in which the first wireless communication signal is coupled to the second branch 202, and therefore, the detailed description thereof is omitted here.
Therefore, in order to improve the efficiency of the first feeding source 203 generating the excitation signal of the first frequency band, and further improve the efficiency of the first branch 201 radiating the wireless communication signal of the first frequency band, and improve the efficiency of the second feeding source 204 generating the excitation signal of the second frequency band, and further improve the efficiency of the second branch 202 radiating the wireless communication signal of the second frequency band, the second branch 202 may be grounded. For some embodiments, the signals in the overlapping frequency band may be grounded through the filter circuit 2052 connected to the second stub 202, where the signals in the overlapping frequency band may include the excitation signal in the overlapping frequency band in the excitation signal in the first frequency band and the excitation signal in the overlapping frequency band in the second frequency band. Specifically, since the filter circuit 2052 forms a low impedance characteristic to ground for the signal in the overlapped frequency band, the excitation signal in the overlapped frequency band, which is coupled to the second branch 202 through the slot 206, in the excitation signal in the first frequency band generated by the first power supply 203 can be grounded through the filter circuit 2052; the second power supply 204 generates the excitation signal in the overlapped frequency band in the excitation signals in the second frequency band, and may also be grounded through the filter circuit 2052. Thereby, the efficiency of the first power supply 203 for generating the excitation signal of the first frequency band and the efficiency of the second power supply 204 for generating the excitation signal of the second frequency band can be improved. The filter circuit 2052 may be a capacitor, a band-stop filter, a low-pass filter, or the like, which can be specifically referred to in the description of the following embodiments.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in the electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
For some embodiments, as can be seen from the foregoing description, the filter circuit 2052 forms a low impedance characteristic to ground for the signal of the overlapped frequency band and forms a high impedance characteristic to ground for the detection signal. Thus, the filter circuit 2052 may be, for example, a capacitor. Specifically, the filter circuit 2052 may include a first capacitor C1, where one end of the first capacitor C1 is connected to the input end 2053 of the detection chip 2051, and the other end is grounded, that is, one end of the first capacitor C1 is connected to the detection connection point 2021 on the second branch 202, and the other end is grounded. The first capacitor C1 forms a low impedance characteristic to ground for the signal in the overlapped frequency band, that is, in the excitation signal in the first frequency band obtained by coupling the second branch 202, the excitation signal in the overlapped frequency band can be conducted by the first capacitor C1, that is, the excitation signal is approximately short-circuited with the ground at the other end of the first capacitor C1, so as to implement grounding. Similarly, for the excitation signal of the second frequency band fed through the second feeding source 204 on the second branch 202, the excitation signal in the overlapped frequency band may be conducted by the first capacitor C1, that is, the excitation signal is approximately short-circuited with the ground at the other end of the first capacitor C1, so as to implement grounding. And because the first capacitor C1 forms a high impedance characteristic to the ground for the detection signal, the detection signal of the third frequency band obtained by the sensing of the second branch 202 is cut off by the first capacitor C1, that is, is approximately disconnected from the ground at the other end of the first capacitor C1, so that the detection signal is input through the input end 2053 of the detection chip 2051, thereby improving the sensitivity of the second branch 202 to the detection signal, and further improving the sensitivity of obtaining the distance between the electronic device 100 and the subject to be detected.
Alternatively, the filter circuit 2052 may be a band-stop filter, i.e., the band-stop filter has one end connected to the detection connection point 2021 of the second branch 202 and the other end connected to ground. The band-stop filter may cut off signals within a cut-off frequency range and pass signals outside the cut-off frequency range. Therefore, the band-stop filter can use the third frequency band range corresponding to the detection signal as the cutoff frequency, and at this time, the high-pass filter can form a high impedance characteristic to ground for the detection signal of the third frequency band, and form a low impedance characteristic to ground for the signal of the overlapped frequency band. That is, among the excitation signals of the first frequency band obtained by coupling the second branch 202, the excitation signals in the overlapped frequency band may be conducted by the band-elimination filter, that is, the excitation signals are approximately short-circuited with the ground at the other end of the band-elimination filter, thereby achieving grounding. Similarly, for the excitation signal of the second frequency band fed through the second feeding source 204 on the second branch 202, the excitation signal in the overlapped frequency band may be conducted by the band-stop filter, i.e. approximately short-circuited to the ground at the other end of the band-stop filter, so as to implement grounding. And because the band-stop filter forms a high impedance characteristic to the ground for the detection signal, the detection signal of the third frequency band obtained by the sensing of the second stub 202 is cut off by the band-stop filter, that is, is approximately broken off from the ground at the other end of the band-stop filter, so that the detection signal is input through the input end 2053 of the detection chip 2051, thereby improving the sensitivity of the second stub 202 to obtain the detection signal, and further improving the sensitivity of obtaining the distance between the electronic device 100 and the main body to be detected.
Also illustratively, the filter circuit 2052 may be a high pass filter having one end connected to the detection connection point 2021 on the second branch 202 and the other end connected to ground. The high pass filter may cut off signals below a cutoff frequency and pass signals greater than or equal to the cutoff frequency. Therefore, the high-pass filter can use the upper limit value of the third frequency band range corresponding to the detection signal as the cut-off frequency, at this time, the high-pass filter can form a high impedance to ground characteristic for the detection signal of the third frequency band, and form a low impedance to ground characteristic for the signal of the overlapped frequency band, that is, the excitation signal in the overlapped frequency band in the excitation signal of the first frequency band obtained by coupling the second stub 202 can be turned on by the high-pass filter, that is, the excitation signal is approximately short-circuited with the ground at the other end of the high-pass filter, thereby achieving grounding. Similarly, for the excitation signal of the second frequency band fed through the second feeding source 204 on the second branch 202, the excitation signal in the overlapped frequency band may be conducted by the high-pass filter, i.e. approximately short-circuited with the ground at the other end of the high-pass filter, so as to implement grounding. Since the high-pass filter forms a high impedance characteristic to the ground for the detection signal, the detection signal of the third frequency band obtained by the sensing of the second stub 202 is cut off by the high-pass filter, that is, is approximately broken off from the ground at the other end of the high-pass filter, so that the detection signal is input through the input end 2053 of the detection chip 2051, thereby improving the sensitivity of the second stub 202 to obtain the detection signal, and further improving the sensitivity of obtaining the distance between the electronic device 100 and the subject to be detected.
Referring to fig. 4, fig. 4 is a schematic structural diagram illustrating an antenna assembly 250 and a detection assembly 205 in the electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
For some embodiments, as can be seen from the above analysis, the frequency of the third frequency band is lower than that of the overlapping frequency band, and therefore, in order to couple the detection signal of the third frequency band with a lower frequency into the detection chip 2051 as much as possible, and to couple the signal of the overlapping frequency band with a higher frequency into the detection chip 2051 as little as possible, an inductor may be connected in series between the input end 2053 of the detection chip 2051 and the detection connection point 2021. Specifically, the detection component 205 may further include a first inductor L1, wherein one end of the first inductor L1 is connected to one end of the first capacitor C1, and the other end of the first inductor L1 is connected to the input end 2053 of the detection chip 2051. The first inductor L1 forms a high impedance characteristic for the signal of the overlapped frequency band, and forms a low impedance characteristic for the detection signal. Therefore, through the first inductor L1, the detection signal of the third frequency band with a lower frequency can be coupled into the detection chip 2051 as much as possible, and the signal of the overlapping frequency band with a higher frequency is not coupled into the detection chip 2051 as much as possible, so that the sensitivity of the detection component 205 for detecting the distance between the body to be detected and the electronic device 200 can be improved.
Referring to fig. 5, fig. 5 shows a schematic structural diagram of the antenna assembly 250 and the detection assembly 205 in the electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
For some embodiments, the first power supply 203 and the first branch 201 may be connected by a first power supply line 211, and when the excitation signal of the first frequency band generated by the first power supply 203 is fed into the first branch 201 through the first power supply line 211, the first power supply line 211 may generate different impedance. Because the frequency of the first frequency band is generally higher, if the impedance between the first feeding line 211 and the first feeding line 203 is not matched, the first feeding line 203 feeds the excitation signal of the first frequency band of the first branch 201, and in the process of transmitting the excitation signal of the first frequency band to the first branch 201 through the first feeding line 211, a part of the excitation signal of the first frequency band is reflected back to the first feeding line 203, so that the efficiency of the first feeding line is reduced. Therefore, the electronic device 100 may further comprise a first matching circuit 207, wherein a first terminal of the first matching circuit 207 is connected to the first power supply 203, a second terminal of the first matching circuit 207 is connected to the first power feeding point 281 of the first branch 201, and a third terminal of the first matching circuit is grounded. The first matching circuit 207 is used for impedance matching between the first power supply 203 and the first power supply line 211, so that the excitation signal of the first frequency band generated by the first power supply 203 is transmitted to the first branch 201 through the first power supply line 211 as much as possible, and is less reflected back to the first power supply 203, thereby improving the efficiency of the first power supply 203. For example, when the impedance between the first power feeding line 211 and the first power feeding source 203 is matched, the impedance between the first power feeding line 211 and the first power feeding source 203 may be 75 ohms. The first matching circuit 207 may be a matching circuit formed by an inductor and a capacitor, which is not limited in this application.
Similarly, the second feeding source 204 can be connected to the second feeding point 2022 of the second branch 202 via the second feeding line 212, and the excitation signal of the second frequency band generated by the second feeding source 204 is fed to the second branch 202 via the second feeding line 212, so that the second feeding line 212 generates different impedance. Since the frequency of the second frequency band is generally higher, if the impedance between the second feeding line 212 and the second feeding source 204 is mismatched, the excitation signal of the second frequency band fed into the second branch 202 by the second feeding source 204 will be reflected back to the second feeding source 204 in the process of being transmitted to the second branch 202 through the second feeding line 212, so that the efficiency of the first feeding source is reduced. Therefore, the electronic device 100 may further include a second matching circuit 210, wherein a first terminal of the second matching circuit 210 is connected to the second power supply 204, a second terminal is connected to the first power feeding point 281 of the second branch 202, and a third terminal is grounded. The second matching circuit 210 is used to match the impedance between the second power supply 204 and the second power supply line 212, so that the excitation signal of the second frequency band generated by the second power supply 204 is transmitted to the second branch 202 through the second power supply line 212 as far as possible, and is less reflected back to the second power supply 204, thereby improving the efficiency of the second power supply 204. For example, when the impedance between the second power feed line 212 and the second power feed source 204 is matched, the impedance between the second power feed line 212 and the second power feed source 204 may be 75 ohms. The second matching circuit 210 may be a matching circuit formed by an inductor and a capacitor, which is not limited in this application.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating resonance points of a first power supply and a second power supply. In fig. 6, the abscissa is frequency in GHz, where 1ghz =1000mhz, and the ordinate is coupling depth in dB, where fig. 6 includes a curve N1 and a curve N2, where the curve N1 is a relation curve of the coupling depth and the frequency corresponding to the first feeding source, and the curve N2 is a relation curve of the coupling depth and the frequency corresponding to the second feeding source. As can be seen from fig. 6, the curve N1 includes an M1 point and an M2 point, where the coupling depths at the M1 point and the M2 point are deeper, and therefore the M1 point and the M2 point are two resonance points corresponding to the first feeding source. Specifically, the corresponding frequency at the point M1 is 1.85GHz, and the corresponding coupling depth is-2.58 dB; the frequency corresponding to the M2 point is 3.51GHz, and the corresponding coupling depth is-1.56 dB. Fig. 6 further includes a point M3, where the point M3 is a point with a deeper coupling depth on the curve N2, specifically, the frequency corresponding to the point M3 is 3.53GHz, and the corresponding coupling depth is-15.96 dB. It should be noted that the smaller the coupling depth, i.e. the deeper the characteristic coupling depth.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating isolation between a first power supply and a second power supply. Specifically, in fig. 7, the abscissa represents frequency in GHz, and the ordinate represents isolation in dB. Where fig. 7 includes curve N3, curve N3 includes point M4. The curve N3 is used for representing the isolation between the first feed source and the second feed source, and the point M4 represents that the isolation of the first feed source and the second feed source at the frequency corresponding to the point M4 is the isolation value corresponding to the point M4. Specifically, the frequency corresponding to the M4 point is 3.53GHz, and the corresponding isolation is-8.06 dB, it can be known that the isolation of the first feed source and the second feed source at the 3.53GHz frequency is-8.06 dB, that is, decoupling between the first feed source and the second feed source to a certain degree is realized, and the isolation of the first feed source and the second feed source at the N78 frequency segment is improved to a certain degree. Further, it can be known from the above analysis that the first wireless communication signal generated by the first power supply and the second wireless communication signal generated by the second power supply overlap in the N78 frequency band, that is, the first power supply and the second power supply do not overlap in the frequency band outside the N78 frequency band, so that the isolation between the first power supply and the second power supply is higher in the frequency band outside the N78 frequency band.
For some embodiments, in order to further improve the isolation between the first power supply and the second power supply, an isolation circuit may be further disposed on the second branch, and the signal in the overlapped frequency band may be grounded through the isolation circuit. Specifically, referring to fig. 8, fig. 8 is a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in the electronic device 100. The electronic device 100 shown in fig. 8 further includes an isolation circuit 209, and the isolation circuit 209 may be disposed between the first end of the second branch 202 and the feed point 2022. Therefore, when the first feeding source 203 generates the first wireless communication signal through the first branch 201, the first wireless communication signal is coupled to generate the first current on the second branch, and the isolation circuit 209 may be configured to ground the first current generated by the first wireless communication signal on the second branch; when the second feeding source 204 generates the second wireless communication signal through the second branch 202, the second branch 202 may couple to generate a second current, and the second current may be coupled to the first branch 201 through the slot 206, and at this time, the isolation circuit 209 is further configured to ground the second current generated by the second wireless communication signal on the second branch. For the above description, reference may be made to the foregoing embodiments for generating the first current and the second current through coupling, and details thereof are not repeated here. By providing the isolation circuit 209, the isolation between the first power supply 203 and the second power supply 204 can be further improved.
Optionally, in the electronic device 100 shown in fig. 8, an isolation point 282 is further disposed on the second branch 202, and the isolation point 282 is located on a side of the second feeding point 2022 facing the first branch 201. Further, the antenna component 250 further comprises an isolation circuit 209, the isolation circuit 209 is connected to the isolation point 282, and the isolation circuit 209 forms a low impedance characteristic to ground for signals in the overlapped frequency band.
Specifically, as can be seen from the foregoing description, the signals in the overlapping frequency band include the excitation signal in the overlapping frequency band in the excitation signal in the first frequency band, and the excitation signal in the overlapping frequency band in the second frequency band. Therefore, the isolation circuit 209 may form a low impedance to ground for the excitation signal in the overlapped frequency band in the excitation signal in the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band, so that the excitation signal in the overlapped frequency band in the excitation signal in the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band may be grounded through the isolation circuit 209, thereby improving the isolation between the first feeding source 203 and the second feeding source 204, wherein for the analysis of improving the isolation, reference may be made to the description in the foregoing embodiments, and details are not repeated here.
Referring to fig. 9, fig. 9 is a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in an electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
In the electronic device 100 shown in fig. 9, the isolation point 282 disposed on the second branch 202 may include a first filtering point 2821, and the first filtering point 2821 is located on a side of the detection connection point 2021 facing the first branch 201. The isolation circuit 209 may comprise a first filtering circuit 2091, wherein the first filtering circuit 2091 is connected to the first filtering point 2821 and, in turn, to ground, forms a low impedance characteristic to ground for signals in overlapping frequency bands.
Specifically, as can be seen from the foregoing description, the signals in the overlapping frequency band include the excitation signal in the overlapping frequency band in the excitation signal in the first frequency band, and the excitation signal in the overlapping frequency band in the second frequency band. Therefore, the first filter circuit 2091 may form a low impedance to ground for the excitation signal in the overlapped frequency band in the excitation signal in the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band, so that the excitation signal in the overlapped frequency band in the excitation signal in the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band may be grounded through the first filter circuit 2091, thereby improving the isolation between the first power supply 203 and the second power supply 204, wherein for the analysis of improving the isolation, reference may be made to the description in the foregoing embodiment, and details are not repeated here.
Referring to fig. 10, fig. 10 is a schematic structural diagram illustrating an antenna element 250 and a detection element 205 in an electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
In the electronic device 100 shown in fig. 10, the isolation point 282 disposed on the second branch 202 may include a second filtering point 2822, and the second filtering point 2822 is located on a side of the detection connection point 2021 away from the first branch 201. The isolation circuit 209 may further include a second filtering circuit 2092, wherein the second filtering circuit 2092 is connected to the second filtering point 2822 and to ground, and the second filtering circuit 2092 forms a low impedance characteristic to ground for signals in the overlapped frequency bands.
Similarly, the second filter circuit 2092 may form a low impedance to ground for the excitation signal in the overlapped frequency band in the excitation signal of the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band, so that the excitation signal in the overlapped frequency band in the excitation signal of the first frequency band and the excitation signal in the overlapped frequency band in the second frequency band may be grounded through the second filter circuit 2092, thereby improving the isolation between the first feeding source 203 and the second feeding source 204, wherein for the analysis of improving the isolation, the description in the foregoing embodiment may be referred to, and will not be repeated here.
Referring to fig. 11, fig. 11 shows a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in an electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
In the electronic device 100 shown in fig. 11, the isolation point 282 disposed on the second branch 202 may include a first filtering point 2821 and the second filtering point 2822, the second filtering point 2822 is located on a side of the detection connection point 2021 away from the first branch 201, the first filtering point 2821 is located on a side of the detection connection point 2021 toward the first branch 201, and thus the second filtering point 2822 is located on a side of the detection connection point 2021 away from the first branch. The isolation circuit 209 may include a first filtering circuit 2091 and a second filtering circuit 2092, wherein the first filtering circuit 2091 is connected to the first filtering point 2821 and to ground; the second filtering circuit 2092 is coupled to the second filtering point 2822 and to ground.
Further, in the embodiment provided in the present application, the first filtering circuit 2091 and the second filtering circuit 2092 both form a low impedance characteristic to ground for the signal in the overlapped frequency band, so that the isolation between the first feeding source 203 and the second feeding source 204 can be further improved, wherein for the analysis of the improved isolation, reference may be made to the description in the foregoing embodiment, and details are not described here.
Further, please refer to fig. 12, wherein fig. 12 illustrates a schematic structural diagram of an antenna assembly 250 and a detection assembly 205 in the electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
Specifically, in fig. 12, the first filter circuit 2091 includes a second capacitor C2 and a second inductor L2, wherein one end of the second capacitor C2 is connected to the first filter point 2821, the other end is connected to the second inductor L2, and the other end of the second inductor L2 is grounded. The second filtering circuit 2092 includes a third capacitor C3 and a third inductor L3, wherein one end of the third capacitor C3 is connected to the second filtering point 2822, the other end is connected to the third inductor L3, and the other end of the third inductor L3 is grounded. For example, in order to make the conducting frequency band of the first filter circuit 2091 composed of the second capacitor C2 and the second inductor L2 the same as the overlapping frequency band, the second capacitor C2 may be 3pf, where pf is the unit of capacitance picofarad, and the second inductor L2 may be 0.7nh, where nh is the unit of inductance nanohenry. For another example, in order to make the conducting frequency band of the second filter circuit 2092 composed of the third capacitor C3 and the third inductor L3 the same as the overlapped frequency band, the third capacitor C3 may be 3pf, and the third inductor L3 may be 0.7nh. Therefore, the first filter circuit 2091 and the second filter circuit 2092 both form a low impedance characteristic to ground for the signals in the overlapped frequency bands, so that the isolation between the first feeding source 203 and the second feeding source 204 can be further improved.
Referring to fig. 13, fig. 13 is a schematic diagram illustrating resonance points of the first feeding source and the second feeding source in the electronic device 100 illustrated in fig. 11. The abscissa shown in fig. 13 is frequency in GHz and the ordinate is coupling depth in dB, and fig. 13 includes a curve N5 and a curve N6, where the curve N5 is the coupling depth versus frequency for the first feed and the curve N6 is the coupling depth versus frequency for the second feed. As can be seen from fig. 13, the curve N5 includes points M5 and M6, where the coupling depths at the points M5 and M6 are deeper, so the points M5 and M6 are two resonance points corresponding to the first feeding source. Specifically, the corresponding frequency at the point M5 is 1.85GHz, and the corresponding coupling depth is-2.63 dB; the frequency corresponding to the M6 point is 3.53GHz, and the corresponding coupling depth is-3.60 dB. Fig. 13 further includes a point M7, where the point M7 is a point with a deep coupling depth on the curve N6, specifically, the frequency corresponding to the point M7 is 3.53GHz, and the corresponding coupling depth is-4.26 dB. Further, fig. 13 also includes a point M8, where M8 is located on the curve N6 and the frequency is around 2.4 GHz. It can be seen that for some embodiments, the second power supply may also generate an excitation signal around 2.4GHz, and then radiate a wireless communication signal in the 2.4GHz band through the second stub.
Further, referring to fig. 14, fig. 14 illustrates isolation between the first power supply and the second power supply in the electronic device 100 in fig. 11. Specifically, in fig. 14, the abscissa represents frequency in GHz, and the ordinate represents isolation in dB. Where fig. 14 includes a curve N7, curve N7 includes a point M9. The curve N7 is used for representing the isolation between the first feed source and the second feed source, and the point M9 represents that the isolation of the first feed source and the second feed source at the frequency corresponding to the point M9 is the isolation value corresponding to the point M9. Specifically, the frequency corresponding to the M9 point is 3.55GHz, and the corresponding isolation is-12.0 dB, so that the isolation of the first feed source and the second feed source at the frequency of 3.55GHz is-12.0 dB. Wherein, 3.55GHz is the overlapping frequency band, i.e. the N78 frequency band. Compared with the isolation between the first feed source and the second feed source shown in fig. 7, the isolation between the first feed source and the second feed source is improved to a certain extent, that is, further decoupling between the first feed source and the second feed source is realized, so that the isolation between the first feed source and the second feed source at the N78 frequency band is improved.
Further, referring to fig. 15, fig. 15 shows a radiation efficiency diagram of the electronic device in fig. 2 and the electronic device in fig. 11 in the N78 frequency band, respectively. In fig. 15, the abscissa is frequency in GHz and the ordinate is radiation efficiency in dB. Specifically, fig. 15 includes a curve N8 and a curve N9, where N8 is used to characterize the radiation efficiency of the electronic device 100 shown in fig. 2 in the N78 frequency band, and N9 is used to characterize the radiation efficiency of the electronic device 100 shown in fig. 11 in the N78 frequency band. Furthermore, the N8 also comprises an M10 point, the N9 also comprises an M11 point, the frequency corresponding to the M10 point is 3.38GHz, the radiation efficiency is-10.36dB, the frequency corresponding to the M11 point is 3.52GHz, and the radiation efficiency is-3.98 dB. As can be easily seen from fig. 15, the radiation efficiency of the curve N8 is better than that of N9, and it can be seen that, by adding the isolation circuit in fig. 11, the radiation efficiency of the first power supply and the second power supply in the N78 frequency band is improved.
Referring to fig. 16, fig. 16 is a schematic structural diagram of an antenna element 250 and a detection element 205 in the electronic device 100. For specific connection and functions of the antenna element 250 and the detecting element 205, reference may be made to the descriptions in the foregoing embodiments, and details thereof are not repeated here.
Further, the antenna assembly 250 may further include a third branch 275, and the third branch 275 is opposite to the second branch 202 and forms a second slot 276. Similar to the slot 206, the excitation signal of the second frequency band generated by the second feeding source 204 may be coupled to the third branch 275 through the second slot 276. The third branch 275 is further provided with a third grounding point 274, and the third branch 275 can be grounded through the third grounding point 274.
In some embodiments, the first branch 201 may further be provided with a first ground point 271, the first ground point 271 being located at a side of the first feeding point 281 facing away from the second branch 202. The first branch 201 may be grounded via the first ground point 271. The second branch 202 may further have a second grounding point 272, and the second grounding point 272 is disposed on the side of the detection connection point 2021 close to the first branch 201. The second stub 202 may be grounded via a second ground point 272.
Optionally, the antenna assembly may further include a third matching circuit 273, and the second branch 202 may be grounded through the third matching circuit 273. The third matching circuit 273 may provide the excitation signal of the second frequency band fed to the second branch 202 from the second power supply 204 with a low impedance to ground, so as to ground the excitation signal of the second frequency band. Alternatively, the third matching circuit 273 may be partially grounded to the excitation signal of the first frequency band coupled from the second branch 202 through the slot 206.
The application provides an electronic device, includes: the detection assembly comprises a detection chip and a filter circuit, wherein the first feed source is connected with the first feed point and is used for feeding an excitation signal of a first frequency band to the first branch so as to excite the first branch to form resonance of the first frequency band; the second feeding source is connected with the second feeding point and used for feeding an excitation signal of a second frequency band into the second branch node so as to excite the second branch node to form resonance of the second frequency band, wherein the first frequency band and the second frequency band comprise at least partially overlapped frequency bands; and the filter circuit is connected between the detection chip and the detection connection point and is grounded, and the filter circuit forms low impedance characteristics to the ground for the signals of the overlapped frequency band and forms high impedance characteristics to the ground for the detection signals. The excitation signal of the first frequency band fed into the first branch by the first feeding source and the excitation signal of the second frequency band fed into the second branch by the second feeding source comprise at least partially overlapped frequency bands, and the excitation signals of the overlapped frequency bands are easy to interfere with each other, so that the isolation degree of the first feeding source and the second feeding source corresponding to the overlapped frequency bands is reduced. Therefore, this application is right through filter circuit the signal of overlapping the frequency channel forms the low impedance characteristic to ground, makes the signal of overlapping the frequency channel can pass through filter circuit ground connection, can reduce the mutual interference that improves the signal of overlapping the frequency channel to a certain extent, and then improves the isolation of the signal of overlapping the frequency channel that first feeder and second feeder correspond.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims (10)

1. An electronic device, comprising:
an antenna assembly, comprising,
the first branch knot is provided with a first feeding point;
the second branch knot is opposite to the first branch knot and is provided with a gap, the second branch knot is provided with a second feeding point and a detection connection point, and the second feeding point is positioned on one side of the detection connection point, which is far away from the first branch knot;
the first feed source is connected with the first feed point and used for feeding an excitation signal of a first frequency band into the first branch node so as to excite the first branch node to form resonance of the first frequency band;
the second feeding source is connected with the second feeding point and used for feeding an excitation signal of a second frequency band into the second branch node so as to excite the second branch node to form resonance of the second frequency band, wherein the first frequency band and the second frequency band comprise at least partially overlapped frequency bands;
the detection assembly, comprising,
the detection chip is used for detecting a detection signal of a third frequency band sensed by the second branch knot;
and the filter circuit is connected between the detection chip and the detection connection point and is grounded, and the filter circuit forms low impedance characteristics to the ground for the signals of the overlapped frequency band and forms high impedance characteristics to the ground for the detection signals.
2. The electronic device of claim 1, wherein an isolation point is further disposed on the second branch, the isolation point being located on a side of the second feeding point facing the first branch, the antenna assembly further comprising:
and the isolation circuit is connected with the isolation point and is grounded, and the isolation circuit forms low impedance characteristics to the ground for the signals of the overlapped frequency band.
3. The electronic device of claim 2, wherein the isolation circuit comprises a first filter circuit, the isolation point comprises a first filter point, the first filter point is located on a side of the detection connection point facing the first stub, the first filter circuit is connected to the first filter point, and is grounded, and the first filter circuit forms a low impedance characteristic to ground for signals in an overlapping frequency band.
4. The electronic device according to claim 2, wherein the isolation circuit includes a second filter circuit, the isolation point includes a second filter point, the second filter point is located on a side of the detection connection point away from the first stub, the second filter circuit is connected to the second filter point and is grounded, and the second filter circuit forms a low impedance characteristic to ground for a signal in an overlapping frequency band.
5. The electronic device according to claim 2, wherein the isolation circuit includes a first filter circuit and a second filter circuit, the isolation point includes a first filter point and a second filter point, the second filter point is located on a side of the first filter point away from the first branch, the first filter point is located on a side of the detection connection point toward the first branch, and the second filter point is located on a side of the detection connection point away from the first branch.
6. The electronic device according to claim 3 or 5, wherein the on-band of the first filter circuit is the same as the overlapping band.
7. The electronic device according to claim 4 or 5, wherein the on-band of the second filter circuit is the same as the overlapping band.
8. The electronic device of claim 1, wherein the filter circuit comprises a first capacitor, one end of the first capacitor is connected to the input end of the detection chip, and the other end of the first capacitor is grounded;
the first capacitor forms a low impedance characteristic to ground for signals of the overlapping frequency band and a high impedance characteristic to ground for the detection signal.
9. The electronic device of claim 8, wherein the detection component further comprises a first inductor, one end of the first inductor is connected to one end of the first capacitor, and the other end of the first inductor is connected to the input end of the detection chip;
the first inductor forms a high impedance characteristic for the signals of the overlapping frequency bands and forms a low impedance characteristic for the detection signals.
10. The electronic device of claim 1, wherein the first frequency band comprises a medium-high frequency band and an ultra-high frequency band, and the second frequency band comprises an ultra-high frequency band;
the overlapped frequency band is an N78 frequency band.
CN202211098152.0A 2022-09-08 2022-09-08 Electronic device Pending CN115483531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211098152.0A CN115483531A (en) 2022-09-08 2022-09-08 Electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211098152.0A CN115483531A (en) 2022-09-08 2022-09-08 Electronic device

Publications (1)

Publication Number Publication Date
CN115483531A true CN115483531A (en) 2022-12-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211098152.0A Pending CN115483531A (en) 2022-09-08 2022-09-08 Electronic device

Country Status (1)

Country Link
CN (1) CN115483531A (en)

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