CN202817169U - Apparatus for reducing antenna radiation energy - Google Patents
Apparatus for reducing antenna radiation energy Download PDFInfo
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- CN202817169U CN202817169U CN 201220432971 CN201220432971U CN202817169U CN 202817169 U CN202817169 U CN 202817169U CN 201220432971 CN201220432971 CN 201220432971 CN 201220432971 U CN201220432971 U CN 201220432971U CN 202817169 U CN202817169 U CN 202817169U
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- antenna
- pass filter
- proximity sensing
- sensing device
- high pass
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Abstract
The utility model discloses an apparatus for reducing antenna radiation energy, comprising an antenna and an adjacent inductor. The antenna is electrically connected to a grounding metal surface; a high pass filter is in series between the antenna and the grounding metal surface; the adjacent inductor possesses a sensing chip; the sensing chip is electrically connected to a low pass filter; then the low pass filter is electrically connected to the circuit between the high pass filter and the antenna; and the antenna and the adjacent inductor are arranged on a circuit board. The adjacent inductor and the antenna apply the grounding metal surface in common, the high pass filter and the low pass filter are employed, and thereby no mutual interference is generated when the antenna and the adjacent inductor are running, the antenna and the adjacent inductor are integrated in a predetermined area of the circuit board, the occupation space of the antenna and the adjacent inductor is minimized, the induction accuracy of the adjacent inductor is raised, the radiation power of the antenna is effectively reduced, and simultaneously, the volume is reduced, and the applicability is lifted.
Description
Technical field
The utility model provides a kind of reduction antenna energy device, espespecially between antenna and grounding metal plane, be in series with high pass filter, and after the sensor chip of proximity sensing device is electrically connected low pass filter, be electrically connected at again the circuit between high pass filter and the antenna, with the shared grounding metal covering and avoid antenna and the mutual interference of proximity sensing device phase.
Background technology
Along with the research and development of wireless communication technique and popularize, the figure of wireless communication apparatus can be seen in many places in living now, any wireless communication apparatus all needs to install emission and the reception that antenna carries out wireless signal, but the electromagnetic wave that antenna gives off often may jeopardize the health of human body, therefore various countries have all concluded relevant decree, but specific absorption rate rate (the SpecificAbsorption Rate of the wireless communication apparatus (such as mobile phone or panel computer etc.) of regulation emitting electromagnetic wave, SAR), its specific absorption rate rate refers to the electromagnetic wave energy that the tissue of unit mass in the unit interval absorbs, its numerical value is higher, expression is larger to the potential nocuity of human body, so must be lower than a safety value, to limit energy that electronic installation can radiate or radiation-curable maximum limit amount.
If wireless communication apparatus fails to detect and safety by the specific absorption rate rate, namely can not sell or import in the market in accordance with the law, so in order to cause the SAR value can meet test specification, existing wireless communication apparatus just reduces total radiant power mostly simply, so that the SAR value is maintained in the safe test specification, but along with the reduction of radiant power, the distance that electromagnetic wave transmits will with reduction, and then affect the communication quality of wireless communication apparatus.
Be with, just there is manufacturer to research and develop for this problem, see through installing proximity sensing device (Proximity Sensor, P-sensor) reduce the power output of power amplifier, the input power of antenna is reduced, thereby reduce the radiant power of antenna, take mobile phone as example, when by the user moves to mobile phone in ear, conversing, its mobile phone is the most serious from the nearest and electromagnetic impact of human body, the proximity sensing device just can be sensed close human body and allow radiant power reduce this moment, can allow the SAR value meet test specification to guarantee that the user is healthy.
See also shown in Figure 5, its proximity sensing device A mainly comprises circuit board A1, sensor chip (IC) A2 and sensing sheet metal A3, because sensing sheet metal A3 need design and have very large area, just can detect accurately human body approach, but in design, because sensing sheet metal A3 from the ground of wireless telecommunication system too close to the time induction can lose efficacy, and sensing sheet metal A3 from antenna too close to the time also can have a strong impact on the radiance of antenna, so all be that proximity sensing device A and antenna are divided into two independent components in the general design, and spaced apart, but since now wireless communication apparatus all towards light, thin, short, little direction is researched and developed, so above-mentioned existing proximity sensing device A and antenna are when reality is used, because of the sensing sheet metal volume of proximity sensing device A excessive, and proximity sensing device A and antenna also can't be integrated and be arranged in the same area having complete effect, so small product size just can't be dwindled.
Therefore, how to solve existing proximity sensing device and antenna and take the excessive problem of volume and disappearance, be the relevant manufacturer that is engaged in the industry and desire most ardently the direction place person that research improves.
Summary of the invention
Main purpose of the present utility model is to solve existing proximity sensing device and antenna takies the excessive problem of volume, provide a kind of and can improve proximity sensing device induction accuracy rate and effectively reduce aerial radiation power, the while can reduce again volume and promote the device of applicability.
For reaching above-mentioned purpose, the utility model provides a kind of reduction antenna energy device, comprises antenna and proximity sensing device, and wherein this antenna is electrically connected with grounding metal plane, and is in series with high pass filter between antenna and the grounding metal plane; This proximity sensing utensil has sensor chip, and sensor chip is electrically connected with low pass filter, and low pass filter is electrically connected at the circuit between high pass filter and the antenna again, and antenna and proximity sensing device are arranged on the circuit board.
During enforcement, this proximity sensing device is for to respond to the frequency of 250kHz, and environment electric capacity is about 1～60pF, and high pass filter utilizes one or more electric capacity to form, and its electric capacity is low capacity cell.
During enforcement, be in series with alternating current between this high pass filter and the grounding metal plane.
During enforcement, this low pass filter is comprised of inductance.
During enforcement, this antenna is PIFA, dipole, one pole, FICA or ring-like pattern.
Compared with prior art, the beneficial effects of the utility model are:
The grounding metal plane of proximity sensing device common antenna of the present utility model is as sensitive surface, and utilize high pass filter and low pass filter, allow the high-frequency signals of antenna generation and the low-frequency signal that the proximity sensing device produces completely cut off, allow antenna and the proximity sensing device can the phase mutual interference, just antenna and proximity sensing device can be incorporated in the presumptive area of circuit board, the space that takies of reduction is to be applicable to the antenna of different types by this, just can improving proximity sensing device induction accuracy rate and reducing in the situation of aerial radiation power, reach simultaneously the purpose of reduction small product size and lifting applicability.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Fig. 2 is outside drawing of the present utility model.
Fig. 3 is the impedance matching figure of the utility model antenna.
Fig. 4 is that the utility model antenna is in conjunction with the impedance matching figure of proximity sensing device.
Fig. 5 is the three-dimensional exploded view of existing proximity sensing device.
Description of reference numerals: 1-antenna; The 11-grounding metal plane; The 13-alternating current; The 12-high pass filter; 2-proximity sensing device; The 21-sensor chip; The 22-low pass filter; The 3-circuit board.
Embodiment
For reaching above-mentioned purpose and effect, the technological means that the utility model adopts and structure thereof, hereby drawing illustrates in detail that with regard to preferred embodiment of the present utility model its features and functions is as follows, in order to understanding fully.
See also Fig. 1, shown in Figure 2, be circuit diagram of the present utility model, outside drawing, find out that by knowing shown in the figure this reduction antenna energy device system comprises antenna 1 and proximity sensing device 2(Proximity Sensor, P-sensor); Wherein:
This antenna 1 is for being electrically connected with grounding metal plane 11, and be in series with the high pass filter 12 that utilizes one or more electric capacity 13 to form between antenna 1 and the grounding metal plane 11, and between high pass filter 12 and the grounding metal plane 11 for can be in series with alternating current 14.
This proximity sensing device 2 has sensor chip (IC) 21, sensor chip 21 is for being electrically connected with the low pass filter 22 that inductance forms, low pass filter 22 is electrically connected at the circuit between high pass filter 12 and the antenna 1 again, and antenna 1 and proximity sensing device 2 are for being arranged on the circuit board 3.
Above-mentioned antenna 1 can be the antenna of PIFA, dipole, one pole, FICA or patterns such as ring-like (Loop), its only the tool function that transmits and receive wireless signal get final product, non-so namely limit to claim of the present utility model, as utilize other modifications and equivalent structure to change, all should in like manner be contained in the claim of the present utility model, close and give Chen Ming.
See also Fig. 1, shown in Figure 2, be circuit diagram of the present utility model, outside drawing, find out that by knowing shown in the figure this proximity sensing device 2 is the main grounding metal plane 11 that is electrically connected to antenna 1 that utilizes, utilize grounding metal plane 11 to make the area of sensing, when the low-frequency signal that produces when the sensor chip 21 of proximity sensing device 2 is transferred to circuit between antenna 1 and the grounding metal plane 11, its high pass filter 12 is but that filtering is with isolated this low-frequency signal, please also refer to Fig. 3, Fig. 4, it is that the impedance matching figure of the simple PIFA of use pattern antenna 1 and PIFA pattern antenna 1 are in conjunction with the impedance matching figure of proximity sensing device 2, can learn its dB value lower (comparing with the reference line of-10dB) by figure middle impedance match reference line at high frequency part A, it is better to represent its impedance matching, can avoid low-frequency signal to have influence on the radiance of antenna 1
In addition, because proximity sensing device 2 is for to respond to the frequency of 250kHz, environment electric capacity is about 1～60pF, so low pass filter 22 must use low capacity cell, and the high-frequency signals that antenna 1 produces is sent to and grounding metal plane 11 between circuit the time, it is isolated that the high-frequency signals that its shunting is transmitted towards proximity sensing device 2 just can be low pass filtering 22 filterings of device, please also refer to the 3rd, four figure, it is that the impedance matching figure of antenna 1 and antenna 1 are in conjunction with the impedance matching figure of proximity sensing device 2, can learn that at low frequency part B difference is little by figure middle impedance match reference line, the high-frequency signals of representative antennas 1 can not have influence on proximity sensing device 2, can avoid proximity sensing device 2 influenced and allow induction lose efficacy or reduce the accuracy of induction, and then can prevent the wrong human body of sensing.
When above-mentioned reduction antenna energy of the present utility model is installed on actual use, for can having following advantage, as:
(1) this proximity sensing device 2 can have the effect of shared grounding metal covering 11 for to utilize the grounding metal plane 11 of antenna 1 to be used as sensitive surface, because proximity sensing device 2 must not arrange induction metal plate in addition, just can reach the effect of reduction small product size.
(2) utilize high pass filter 12 and low pass filter 22, allow antenna 1 and proximity sensing device 2 can when running can be not mutual interference, just can effectively antenna 1 and proximity sensing device 2 be incorporated in the presumptive area of circuit board 3, can reduce antenna 1 and proximity sensing device 2 shared spaces, and on the antenna 1 that just can be useful in different types because occupying little space, and can not be subject to the restriction on the ground of wireless telecommunication system.
(3) utilize high pass filter 12 and low pass filter 22, allow the interference that antenna 1 and proximity sensing device 2 can be not mutual, can reach the purpose that improves proximity sensing device 2 induction accuracys rate and effectively reduce aerial radiation power.
So; the utility model is mainly for reducing the antenna energy device; and can between antenna 1 and grounding metal plane 11, be in series with high pass filter 12; and after the sensor chip 21 of proximity sensing device 2 is electrically connected low pass filter 22; be electrically connected at again the circuit between high pass filter 12 and the antenna 1; to reach shared grounding metal covering 11; and avoid antenna 1 and the 2 phase mutual interference of proximity sensing device; be reduced to main key protection point to improve proximity sensing device 2 induction accuracys rate and effectively to reduce under the effect of aerial radiation power, to reach simultaneously the reduction volume and promote applicability.
The above only is preferred embodiment of the present utility model, non-so namely limit to claim of the present utility model, so the simple and easy modification and the equivalent structure that such as use the utility model specification and graphic content to do change, all should in like manner be contained in the claim of the present utility model, close and give Chen Ming.
Claims (5)
1. one kind is reduced the antenna energy device, comprises antenna and proximity sensing device, it is characterized in that,
This antenna is electrically connected with grounding metal plane, and is in series with high pass filter between antenna and the grounding metal plane;
This proximity sensing utensil has sensor chip, and sensor chip is electrically connected with low pass filter, and low pass filter is electrically connected at the circuit between high pass filter and the antenna again, and antenna and proximity sensing device are arranged on the circuit board.
2. reduction antenna energy device as claimed in claim 1, it is characterized in that this proximity sensing device is for to respond to the frequency of 250kHz, environment electric capacity is about 1～60pF, high pass filter utilizes one or more electric capacity to form, and its electric capacity is low capacity cell.
3. reduction antenna energy device as claimed in claim 1 is characterized in that, is in series with alternating current between this high pass filter and the grounding metal plane.
4. reduction antenna energy device as claimed in claim 1 is characterized in that this low pass filter is comprised of inductance.
5. reduction antenna energy device as claimed in claim 1 is characterized in that, this antenna is PIFA, dipole, one pole, FICA or ring-like pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432971 CN202817169U (en) | 2012-08-28 | 2012-08-28 | Apparatus for reducing antenna radiation energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432971 CN202817169U (en) | 2012-08-28 | 2012-08-28 | Apparatus for reducing antenna radiation energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202817169U true CN202817169U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220432971 Expired - Fee Related CN202817169U (en) | 2012-08-28 | 2012-08-28 | Apparatus for reducing antenna radiation energy |
Country Status (1)
| Country | Link |
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| CN (1) | CN202817169U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684063A (en) * | 2013-11-27 | 2015-06-03 | 联想(北京)有限公司 | Communication method for controlling communication power and mobile station |
| CN106411420A (en) * | 2016-09-06 | 2017-02-15 | 惠州Tcl移动通信有限公司 | Signal interference elimination circuit and mobile device |
| US9846252B2 (en) | 2016-02-25 | 2017-12-19 | Asustek Computer Inc. | Proximity sensor and mobile communication device thereof |
| CN107608568A (en) * | 2017-08-31 | 2018-01-19 | 广东欧珀移动通信有限公司 | Light is close to sensing circuit and electronic equipment |
| CN113573396A (en) * | 2020-04-28 | 2021-10-29 | 深圳市万普拉斯科技有限公司 | SAR value control method and device and mobile terminal |
-
2012
- 2012-08-28 CN CN 201220432971 patent/CN202817169U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684063A (en) * | 2013-11-27 | 2015-06-03 | 联想(北京)有限公司 | Communication method for controlling communication power and mobile station |
| US9846252B2 (en) | 2016-02-25 | 2017-12-19 | Asustek Computer Inc. | Proximity sensor and mobile communication device thereof |
| CN106411420A (en) * | 2016-09-06 | 2017-02-15 | 惠州Tcl移动通信有限公司 | Signal interference elimination circuit and mobile device |
| CN107608568A (en) * | 2017-08-31 | 2018-01-19 | 广东欧珀移动通信有限公司 | Light is close to sensing circuit and electronic equipment |
| CN113573396A (en) * | 2020-04-28 | 2021-10-29 | 深圳市万普拉斯科技有限公司 | SAR value control method and device and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150828 |
|
| EXPY | Termination of patent right or utility model |