CN221223679U - Electronic equipment - Google Patents
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- CN221223679U CN221223679U CN202322606537.XU CN202322606537U CN221223679U CN 221223679 U CN221223679 U CN 221223679U CN 202322606537 U CN202322606537 U CN 202322606537U CN 221223679 U CN221223679 U CN 221223679U
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- 230000003071 parasitic effect Effects 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The application provides electronic equipment, wherein in the electronic equipment, on the basis that a first signal end close to an inductor is connected with a radio frequency antenna through a first signal wire, a section with one end close to the inductor and a second signal wire with the other end connected with the ground end of the electronic equipment are arranged, so that parasitic capacitance between the first signal wire and the ground end is filtered by the second signal wire, parasitic capacitance between the radio frequency signal wire and the ground end signal wire can be isolated, and the accuracy of detecting human body distance of an SAR sensor is improved.
Description
Technical Field
The application relates to the technical field of antennas, in particular to electronic equipment.
Background
An electromagnetic radiation Specific Absorption Rate (SAR) sensor is a high performance capacitive sensor. The change of the distance between the human body and the radio frequency antenna can cause the change of the capacitance of the radio frequency antenna to the ground, and the electronic equipment judges the distance between the human body and the radio frequency antenna through the change of the sensing capacitance of the SAR sensor, so that the radio frequency power is adjusted in a targeted manner to meet the threshold specification of the rule on SAR.
Because parasitic capacitance exists between a radio frequency signal wire connected with the radio frequency antenna and the ground end of the electronic equipment, the absolute value of the change value of the signal wire ground capacitance detected by the SAR sensor is larger under the temperature change of the electronic equipment, and the misjudgment of the SAR sensor on the human body distance can be triggered.
Disclosure of utility model
The embodiment of the application discloses electronic equipment which can isolate parasitic capacitance between a radio frequency signal line and a ground signal line and improve the accuracy of detecting the human body distance by an SAR sensor.
In a first aspect, the present application provides an electronic device comprising a proximity sensor and an antenna, wherein: the proximity sensor comprises a first signal end and a ground end, wherein the first signal end is connected with the antenna through a first signal wire, and the first signal wire is used for transmitting a detection signal between the first signal end of the proximity sensor and the antenna; the ground terminal is respectively connected with the ground terminal of the electronic equipment and the second signal line, and the second signal line is used for filtering parasitic capacitance between the first signal line and the ground terminal.
In one embodiment, the proximity sensor further comprises a second signal terminal, wherein: the second signal end is connected with the ground end of the electronic equipment through a third signal wire and a first capacitor and is used for reducing the absolute value of the capacitance change value of the first signal wire to the ground end close to the inductor, and the capacitance change value changes along with the temperature of the electronic equipment.
In one embodiment, the third signal line is located at a position between the second signal line and the first signal line.
In one embodiment, the second signal line is located at a position between the third signal line and the first signal line.
In one embodiment, the second signal lines include at least two second signal lines, the at least two second signal lines are connected in parallel, the at least two second signal lines include a first part signal line and a second part signal line, and the first part signal line and the second part signal line are respectively located at two sides of the first signal line.
In one embodiment, the third signal line is located between the first partial signal line and the second partial signal line.
In one embodiment, the second signal line is connected to a ground terminal of the electronic device through a second capacitor, and is used for isolating interference of a high-frequency signal on the first signal line.
In one embodiment, the projection area of the second signal line on the horizontal reference plane completely covers the projection area of the first signal line on the horizontal reference plane.
In one embodiment, any two signal lines of the first partial signal line, the second partial signal line and the third signal line are parallel to each other.
In one embodiment, the capacitance value of the first capacitor and the second capacitor is 22-100pF.
According to the electronic equipment, the section with one end close to the inductor and the second signal wire with the other end connected with the ground end of the electronic equipment are arranged on the basis that the first signal end close to the inductor is connected with the radio frequency antenna through the first signal wire, so that the parasitic capacitance between the first signal wire and the ground end is filtered by the second signal wire, the parasitic capacitance between the radio frequency signal wire and the ground end signal wire can be isolated, and the accuracy of detecting the human body distance of the SAR sensor is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The electronic device provided by the embodiment of the application can be electronic device with a communication function, and the electronic device can be mobile devices such as a smart phone, a tablet personal computer, a wearable device and the like, but is not limited to the mobile devices. The electronic device can radiate radio frequency through the antenna and the outside.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, as shown in fig. 1, the electronic device may include a proximity sensor 10 and an antenna 20, where:
The proximity sensor 10 comprises a first signal end and a ground end, wherein the first signal end is connected with the antenna 20 through a first signal wire, and the first signal wire is used for transmitting a detection signal between the first signal end of the proximity sensor 10 and the antenna 20;
the ground terminal is connected with the ground terminal 30 and the second signal line of the electronic device, and the second signal line is used for filtering parasitic capacitance between the first signal line and the ground terminal.
It should be understood that the end of the second signal line far from the ground terminal near the sensor 10 may be in a floating state, or may be connected to the ground terminal 30 of the electronic device through a capacitor.
In the implementation process, the first signal line transmits the detection signal between the antenna 20 and the proximity sensor 10 in real time, and in the transmission process, the second signal line covers part or all of the first signal line, so that the second signal line can weaken parasitic capacitance generated between the first signal line and the ground signal, so as to avoid the influence of the parasitic capacitance on the detection of the proximity sensor 10.
In one embodiment, the projection area of the second signal line on the horizontal reference plane may completely cover the projection area of the first signal line on the horizontal reference plane.
It should be understood that the above-mentioned projection area of the second signal line completely covers the projection area of the first signal line means that the second signal line and the first signal line are in the same numerical direction, and the diameter of the second signal line is greater than or equal to the diameter of the first signal line.
The second signal line may be routed from the surface of the motherboard, where the second signal line may include at least two signal line segments, where a diameter of one signal line segment a is greater than or equal to a diameter of the first signal line segment, the remaining signal line segments employ a conventional signal line diameter, the signal line segment a may start from near the antenna 20 to near the first signal end, and the remaining portion of the second signal line segment employs the remaining signal line segment.
It can be understood that, since the projection area of the second signal line on the horizontal reference plane completely covers the projection area of the first signal line on the horizontal reference plane, that is, the parasitic capacitance generated by the first signal line to the ground can be completely isolated by the second signal line, so as to completely eliminate the parasitic capacitance generated by the first signal line to the ground.
In the above electronic device, on the basis that the first signal end close to the inductor 10 is connected to the rf antenna 20 through the first signal line, a section with one end close to the inductor 10 is provided, and the second signal line with the other end connected to the ground 30 of the electronic device is provided, so that the second signal line filters out the parasitic capacitance between the first signal line and the ground, thereby isolating the parasitic capacitance between the rf signal line and the ground signal line, and improving the accuracy of detecting the human body distance by the SAR sensor.
In one embodiment, as shown in fig. 2, the proximity sensor 10 further includes a second signal terminal, wherein:
The second signal terminal is connected to the ground terminal 30 of the electronic device through the third signal line and the first capacitor 40, and is used for reducing the absolute value of the capacitance change value of the first signal line near the ground terminal of the inductor 10, wherein the capacitance change value changes along with the temperature of the electronic device.
In the implementation process, the capacitance change value between the first signal line and the second signal line is approximately equal to the capacitance change value between the third signal line and the second signal line, so that the electronic device can obtain the capacitance change value Cap (ag) of the antenna 20 according to the difference between the two capacitance change values acquired by the first signal end and the second signal end close to the sensor 10, thereby accurately judging the distance from the human body to the antenna 20.
Alternatively, the position of the second signal line may be set by a person skilled in the art according to the actual situation, for example, the first signal line and the third signal line are located on the same side of the second signal line, or the first signal line and the third signal line are respectively located on the opposite sides of the second signal line, so as to block the parasitic capacitance of the first signal line and the first capacitance 40 on the third signal line from affecting the calculation result.
Illustratively, taking the example that the first signal line and the third signal line are located on the same side of the second signal line, as shown in fig. 2, the third signal line is located at a position between the second signal line and the first signal line.
Illustratively, taking the first signal line and the third signal line respectively located on the opposite sides of the second signal line as shown in fig. 3, the second signal line is located between the third signal line and the first signal line.
In one embodiment, as shown in fig. 4, the second signal lines may include at least two second signal lines connected in parallel with each other, and the at least two second signal lines include a first portion signal line and a second portion signal line, which are respectively located at both sides of the first signal line.
It should be appreciated that when the second signal lines include at least two second signal lines, the at least two second signal lines may be respectively located at two sides of the first signal line, so as to further block parasitic capacitance between the signal line of the proximity sensor 10 and the ground 30 of the electronic device, and improve accuracy of the calculation result of the proximity sensor 10.
It should be noted that the number of second signal lines shown in fig. 4 is merely illustrative, and is not intended to limit the specific content.
Alternatively, the position of the third signal line may be set by a person skilled in the art according to the actual situation, for example, the first signal line and the third signal line are both located inside the space formed by at least two second signal lines, or the first signal line and the third signal line are respectively located on the front side and the back side of a certain second signal line, so as to block the parasitic capacitance of the first signal line and the influence of the first capacitance 40 on the third signal line on the calculation result.
Illustratively, taking an example in which the first signal line and the third signal line are both located inside a space formed by at least two second signal lines, as shown in fig. 5, the third signal line is located at a position between the first partial signal line and the second partial signal line.
For example, taking the first signal line and the third signal line respectively located on the opposite sides of a certain second signal line as shown in fig. 6, the first signal line is located between the first part of signal lines and the second part of signal lines, and the third signal line is located on one side of the first part of signal lines away from the first signal line.
In one embodiment, as shown in fig. 7, the second signal line is connected to the ground 30 of the electronic device through the second capacitor 50, so as to isolate the interference of the high-frequency signal on the first signal line.
In one embodiment, any two of the first partial signal line, the second partial signal line, and the third signal line are parallel to each other.
In one embodiment, the capacitance of the first capacitor 40 and the second capacitor 50 is 22-100pF.
Fig. 8 is a schematic structural diagram of an electronic device according to the present application. As shown in fig. 8, taking a proximity sensor as an example of a SAR sensor, the electronic device includes a SAR sensor and an antenna, the SAR sensor includes a ground terminal, a signal line a terminal, and a reference line B terminal, and the signal line a terminal is connected with the antenna through the signal line a; the end of the reference line B is connected with the ground end of the electronic equipment through the reference line B and the capacitor C1; the ground terminal is connected with the ground terminal of the electronic equipment through the reference line D and the capacitor C2.
In the implementation process, when the temperature of the device changes, a capacitance change value Cap (ad) between a signal line A and a reference line D is approximately equal to a capacitance change value Cap (bd) between a reference line B and the reference line D, wherein the device detects the capacitance change of the reference line B to D to obtain the capacitance influence of the reference line D to the signal line A, and the capacitance change value Cap (a) detected by the signal line A is as follows: the capacitance change value Cap (ag) between the antenna and the reference line D is added to the capacitance change value Cap (ad) between the antenna and the reference line B, and the capacitance change value Cap (B) detected by the reference line B is: a capacitance change value Cap (bd) between the reference line B and the reference line D; therefore, the antenna ground capacitance change value Cap (ag) =cap (a) -Cap (ad) =cap (a) -Cap (bd) obtained by calculation of the electronic equipment, namely the electronic equipment can accurately calculate the antenna ground capacitance change value according to the capacitance values detected by the signal line A end and the reference line B end, so that the distance between a human body and the antenna can be accurately judged.
In the description of embodiments of the present utility model, a description of reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
It will be appreciated that references herein to the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are intended to be based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In addition, each functional unit in each embodiment of the present specification may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The foregoing description of the preferred embodiments is provided for the purpose of illustration only, and is not intended to limit the scope of the disclosure, since any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the disclosure are intended to be included within the scope of the disclosure.
Claims (10)
1. An electronic device comprising a proximity sensor and an antenna, wherein:
The proximity sensor comprises a first signal end and a ground end, wherein the first signal end is connected with the antenna through a first signal wire, and the first signal wire is used for transmitting a detection signal between the first signal end of the proximity sensor and the antenna;
the ground terminal is respectively connected with the ground terminal and a second signal line of the electronic equipment, and the second signal line is used for filtering parasitic capacitance between the first signal line and the ground terminal.
2. The electronic device of claim 1, wherein the proximity sensor further comprises a second signal terminal, wherein:
The second signal end is connected with the ground end of the electronic equipment through a third signal wire and a first capacitor and is used for reducing the absolute value of the capacitance change value of the first signal wire to the ground end close to the inductor, and the capacitance change value changes along with the temperature of the electronic equipment.
3. The electronic device of claim 2, wherein the third signal line is located at a position between the second signal line and the first signal line.
4. The electronic device of claim 2, wherein the second signal line is located at a position between the third signal line and the first signal line.
5. The electronic device of claim 2, wherein the second signal line comprises at least two second signal lines connected in parallel with each other, the at least two second signal lines comprising a first partial signal line and a second partial signal line, the first partial signal line and the second partial signal line being located on both sides of the first signal line, respectively.
6. The electronic device of claim 5, wherein the third signal line is located at a position between the first portion signal line and the second portion signal line.
7. The electronic device of claim 2, wherein the second signal line is connected to a ground terminal of the electronic device through a second capacitor, for isolating high frequency signals from interference with the first signal line.
8. The electronic device of any of claims 1-5, wherein a projected area of the second signal line on a horizontal reference plane completely covers a projected area of the first signal line on the horizontal reference plane.
9. The electronic device according to claim 5, wherein any two of the first partial signal line, the second partial signal line, and the third signal line are parallel to each other.
10. The electronic device of claim 7, wherein the first capacitance and the second capacitance have a capacitance value of 22-100pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322606537.XU CN221223679U (en) | 2023-09-25 | 2023-09-25 | Electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322606537.XU CN221223679U (en) | 2023-09-25 | 2023-09-25 | Electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221223679U true CN221223679U (en) | 2024-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322606537.XU Active CN221223679U (en) | 2023-09-25 | 2023-09-25 | Electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN221223679U (en) |
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2023
- 2023-09-25 CN CN202322606537.XU patent/CN221223679U/en active Active
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