CN105099487A - Radio frequency module with power detection for smart homes - Google Patents
Radio frequency module with power detection for smart homes Download PDFInfo
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- CN105099487A CN105099487A CN201510402557.2A CN201510402557A CN105099487A CN 105099487 A CN105099487 A CN 105099487A CN 201510402557 A CN201510402557 A CN 201510402557A CN 105099487 A CN105099487 A CN 105099487A
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Abstract
The invention provides a radio frequency module with power detection for smart homes, and relates to the field of radio frequency modules. The working control problem of the radio frequency module is solved. The radio frequency module comprises: an antenna matching circuit, a directional coupler, a Balun circuit, a power detection circuit, a power supply circuit, a voltage conversion circuit and a processing chip, wherein a signal of the antenna matching circuit is divided into two paths via the directional coupler, one path of signal is converted into a single-path signal by the Balun circuit to be sent to the power detection signal circuit, a detection signal is transmitted to a processor, the working condition of the radio frequency module is determined according to a voltage working table stored in the processor, if the working condition is normal, the other path of digital signal is received and sent, if the working condition is abnormal, data reception is interrupted to guarantee the normality of hardware of the module, a user masters the current working state of the equipment, and an amplifier and other accessories in the module avoid overload work, so as to prolong the service life of the radio frequency module and prevent wrong operation on radio frequency equipment.
Description
Technical field
The present invention relates to radio-frequency module field, be specifically related to the radio-frequency module of a kind of Smart Home band power detection.
Background technology
Radio-frequency module is widely used in Internet of Things field, especially in intelligent home device field.Radio-frequency module is employed all in a large number in wireless switching and the equipment such as wireless electric curtain and projecting apparatus control device.But general radio-frequency module without power detection power, user cannot be allowed to understand the current operating state of equipment, when working long hours or receiving the signal of other power exception, amplifier in module and other auxiliary device easily work overloadingly, decrease the working life of radio-frequency module, easy radio frequency equipment causes misoperation.
Summary of the invention
The radio-frequency module of a kind of Smart Home band power detection provided by the invention, user can be allowed to understand the current operating state of equipment, when working long hours or receiving the signal of other power exception, the reception of shutoff signal, the amplifier in module and other auxiliary device is made to avoid overwork, add the working life of radio-frequency module, prevent radio frequency equipment from causing misoperation.
A radio-frequency module for Smart Home band power detection, comprising: antenna-matching circuit: comprise antenna and carry out impedance matching and signal filtering to antenna; Directional coupler: the signal transmitted by antenna-matching circuit is converted to two paths of signals and sends balun circuit and process chip respectively to; Balun circuit: the difference radio-frequency signal transmitted by directional coupler is converted to one-channel signal, and one-channel signal is sent to power-sensing circuit; Power-sensing circuit: the power detecting the one-channel signal that balun circuit sends, and export the I/O port of corresponding voltage to process chip; Power circuit: will be that 5V voltage is powered to module to outside voltage transitions; Voltage conversion circuit: module voltage is converted to 3.3V by 5V process chip is powered; Process chip: received RF signal according to the detection voltage judge module operating state of power-sensing circuit.Signal is become two-way through directional coupler by the signal of antenna-matching circuit, one tunnel is converted to one-channel signal to power detection signal circuit through balun circuit, detection signal is sent to processor, according to the voltage power supply table determination radio-frequency module working condition in processor storage, carry out reception to another circuit-switched data signal time normal to send, time abnormal, turn-off data receives and ensures that the hardware of module is normal.
Further, described antenna-matching circuit comprises antenna integrated and SMA interface, antenna integrated cannot meet instructions for use time, the receiving efficiency of signal can be improved by external stand-alone antenna.
Further, the output of described voltage conversion circuit and output are all connected with filter capacitor ground connection, effectively avoid the interference of other signal radio frequency signal in circuit.
Further, described directional coupler is three-dB coupler, and two paths of signals and the input signal of output are identical, ensure that the accuracy of power detection and Signal transmissions.
Further, described power-sensing circuit is diode power-sensing circuit, include a power diode and an in-phase amplification circuit, the detection of signal is realized by power diode D1, electric capacity C15 and resistance R6, resistance R7, R8, R9 and integrated transporting discharging U1A form in-phase amplification circuit, output OUT1 contact resistance R10 ground connection, resistance R10 is as load resistance.
Beneficial effect of the present invention is to allow user understand the current operating state of equipment, when working long hours or receiving the signal of other power exception, the reception of shutoff signal, the amplifier in module and other auxiliary device is made to avoid overwork, add the working life of radio-frequency module, prevent radio frequency equipment from causing misoperation.
Accompanying drawing explanation
Fig. 1 is radio-frequency module schematic diagram of the present invention.
Fig. 2 is antenna-matching circuit schematic diagram of the present invention.
Fig. 3 is power-sensing circuit schematic diagram of the present invention.
Fig. 4 is voltage conversion circuit schematic diagram of the present invention.
Fig. 5 is process chip circuit diagram of the present invention.
Specific embodiment
As one embodiment of the present of invention, antenna-matching circuit considers that receive frequency is the signal of 433M, antenna integrated connection load resistance R1, SMA interface connects load resistance R2, be connected with the electric capacity C3 of 200pF after resistance R1 is connected with the R2 other end, the electric capacity C3 other end passes through the electric capacity C4 ground connection of 12pF after connecting the inductance L 3 of 33nH, L3 two ends connect the inductance L 2 of C3 and 18nH, the electric capacity C5 ground connection of 6.8pF is also connected with between electric capacity C3 and inductance L 3, inductance L 2 other end connects two ports of inductance L 4 as difference radio-frequency signal of electric capacity C2 and 33nH of 6.8pF, the radiofrequency signal port of electric capacity C2 connects ground connection after the inductance L 1 of 33nH and the electric capacity C1 of 220pF successively, the radiofrequency signal port of inductance L 4 connects the electric capacity C6 ground connection of 6.8pF.
Use power diode D1 for HSMS-2850 in power-sensing circuit, integrated transporting discharging U1AAD642JH, the differential sense signal of directional coupler transmission is converted to through balun circuit the positive level that single-ended signal is connected to power diode D1, the positive pole of D1 is also connected with resistance R5 ground connection, and the negative pole of D1 is connected with electric capacity C15 and is also connected with integrated transporting discharging U1A negative input by resistance R7 outward with resistance R6 ground connection; The electrode input end of U1A is connected with resistance R8 ground connection and is also connected with U1A output OUT1 by resistance R9 outward, and U1A output is also connected with R10 ground connection.Power diode D1, electric capacity C15 and resistance R6 realize the detection of signal, and resistance R7, R8, R9 and integrated transporting discharging U1A form in-phase amplification circuit, and output OUT1 contact resistance R10 ground connection, resistance R10 is as load resistance.Output OUT1 is connected for receiving detection power data with an I/O port of processor CC1110.
The 220V of standard is adopted to turn the usb circuit of 5V in embodiment, so the voltage using chip LM1117 to change 5V is powered into processor CC1110 into 3.3V, LM1117 input connects polar capacitor C11 and electric capacity C12 ground connection, output connects polar capacitor C14 and electric capacity C13 ground connection, and at the two ends of voltage transitions, equal filtering clutter interference ensures the stability of voltage transitions.
Processor adopts the CC1110 of TI company, it adopts external crystal-controlled oscillation Y1 to provide system clock, RF_P with RF_N is connected the signal transmission of directional coupler simultaneously, I/O port Q1 connection detection circuit, capacity earth exclusive PCR is connected to untapped function port, I/O mouth P0 to P7, as data output end, carries out connection according to port concrete condition and uses.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a Smart Home radio-frequency module for band power detection, is characterized in that comprising:
Antenna-matching circuit: comprise antenna and impedance matching and signal filtering are carried out to antenna;
Directional coupler: the signal transmitted by antenna-matching circuit is converted to two paths of signals and sends balun circuit and process chip respectively to;
Balun circuit: the difference radio-frequency signal transmitted by directional coupler is converted to one-channel signal, and one-channel signal is sent to power-sensing circuit;
Power-sensing circuit: the power detecting the one-channel signal that balun circuit sends, and export the I/O port of corresponding voltage to process chip;
Power circuit: will be that 5V voltage is powered to module to outside voltage transitions;
Voltage conversion circuit: module voltage is converted to 3.3V by 5V process chip is powered;
Process chip: received RF signal according to the detection voltage judge module operating state of power-sensing circuit.
2. the radio-frequency module of a kind of Smart Home band power detection according to claim 1, it is characterized in that, described antenna-matching circuit comprises antenna integrated and SMA interface.
3. the radio-frequency module of a kind of Smart Home band power detection according to claim 1, it is characterized in that, the output of described voltage conversion circuit and output are all connected with filter capacitor ground connection.
4. the radio-frequency module of a kind of Smart Home band power detection according to claim 1, it is characterized in that, described directional coupler is three-dB coupler.
5. the radio-frequency module of a kind of Smart Home band power detection according to claim 1, it is characterized in that, described power-sensing circuit is diode power-sensing circuit, includes a power diode and an in-phase amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510402557.2A CN105099487A (en) | 2015-07-10 | 2015-07-10 | Radio frequency module with power detection for smart homes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510402557.2A CN105099487A (en) | 2015-07-10 | 2015-07-10 | Radio frequency module with power detection for smart homes |
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| CN105099487A true CN105099487A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510402557.2A Pending CN105099487A (en) | 2015-07-10 | 2015-07-10 | Radio frequency module with power detection for smart homes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086482A (en) * | 2018-01-25 | 2019-08-02 | 鹤壁天海电子信息系统有限公司 | Antenna matching unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110215880A1 (en) * | 2008-04-30 | 2011-09-08 | Razieh Roufoogaran | Method and System for Flip Chip Configurable RF Front End With an Off-Chip Balun |
| CN202374468U (en) * | 2011-12-20 | 2012-08-08 | 弘浩明传科技(北京)股份有限公司 | Integrated power amplifier for wireless access point |
| CN202737863U (en) * | 2012-09-05 | 2013-02-13 | 长沙威胜信息技术有限公司 | Radio communication circuit |
| CN104732254A (en) * | 2014-10-08 | 2015-06-24 | 南京邮电大学 | Radio frequency identification reader and writer |
| CN204886940U (en) * | 2015-07-10 | 2015-12-16 | 成都弘毅天承科技有限公司 | Intelligence house is with radio frequency module who takes power detection |
-
2015
- 2015-07-10 CN CN201510402557.2A patent/CN105099487A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110215880A1 (en) * | 2008-04-30 | 2011-09-08 | Razieh Roufoogaran | Method and System for Flip Chip Configurable RF Front End With an Off-Chip Balun |
| CN202374468U (en) * | 2011-12-20 | 2012-08-08 | 弘浩明传科技(北京)股份有限公司 | Integrated power amplifier for wireless access point |
| CN202737863U (en) * | 2012-09-05 | 2013-02-13 | 长沙威胜信息技术有限公司 | Radio communication circuit |
| CN104732254A (en) * | 2014-10-08 | 2015-06-24 | 南京邮电大学 | Radio frequency identification reader and writer |
| CN204886940U (en) * | 2015-07-10 | 2015-12-16 | 成都弘毅天承科技有限公司 | Intelligence house is with radio frequency module who takes power detection |
Non-Patent Citations (1)
| Title |
|---|
| 孟林川: "基于PR9200的超高频RFID读写核心模块设计与实现", 《万方》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086482A (en) * | 2018-01-25 | 2019-08-02 | 鹤壁天海电子信息系统有限公司 | Antenna matching unit |
| CN110086482B (en) * | 2018-01-25 | 2021-03-26 | 鹤壁天海电子信息系统有限公司 | Antenna matching device |
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Application publication date: 20151125 |
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