CN109450478A - A kind of mixed wireless network and working method - Google Patents
A kind of mixed wireless network and working method Download PDFInfo
- Publication number
- CN109450478A CN109450478A CN201811473052.5A CN201811473052A CN109450478A CN 109450478 A CN109450478 A CN 109450478A CN 201811473052 A CN201811473052 A CN 201811473052A CN 109450478 A CN109450478 A CN 109450478A
- Authority
- CN
- China
- Prior art keywords
- module
- energy
- signal
- radio
- wireless network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
Abstract
The invention belongs to wireless communication technology fields, and in particular to a kind of mixed wireless network and working method.A kind of mixed wireless network includes Anneta module, the first radio-frequency switch array, matching impedance module, backscattering impedance module, the second radio-frequency switch array, data collection module, energy collection module, data transmission module, energy storage units, single-chip microcontroller and protection circuit module.A kind of mixed wireless network of the present invention and its working method, RF energy is collected and backscatter communication function is integrated in same system simultaneously, by the switching for controlling radio-frequency switch array, mixed wireless network can dynamically change its operating mode, to which the flexibility of system greatly increases, therefore can be applied on more different application scenarios；The present invention realizes self sustainable supply of energy by RF energy collecting function, and realizes substantially reducing for communication process energy consumption by backscatter communication.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to a kind of mixed wireless network and working method.
Background technique
Recently, wireless communication using more more and more universal.Wherein, many scholars are dedicated to studying wireless sensor.Wirelessly
Sensor includes many types, it can detect earthquake, electromagnetism, temperature, humidity, noise, luminous intensity, pressure, mobile object
The diversified physical quantity such as speed and direction.Therefore the application field of wireless sensor includes: military affairs, aviation, environment, doctor
The fields such as treatment, health care, household, industry.
Existing wireless sensor is powered by battery to maintain to work normally.
Therefore, these wireless sensors need to replace battery every the specific time.This gives wireless sensor operation and maintenance
Bring many problems.Traditional wireless sensor mostly uses traditional active communication mode (such as: WiFi, Bluetooth communication etc.),
Communication module therein actively generates the local carrier signal of high frequency, and then the carrier wave that the data to be transmitted are modulated to high frequency is believed
In number.High-frequency carrier signal through ovennodulation can blaze abroad outward by antenna.This active communication process needs digital-to-analogue to turn
Parallel operation, microcontroller, power amplifier etc. cooperate, so the process energy consumption entirely communicated is very high.
Currently, the energy supply and operation power consumption of cordless communication network are all critically important problems, many scholars all towards
Improve energy supply and reduces the direction effort of system operation power consumption.
Summary of the invention
To solve the problems, such as that above-mentioned background technique, the present invention propose a kind of mixed wireless network, be integrated with simultaneously
RF energy is collected and backscatter communication function, and by integrated RF collection of energy function, which can automatically be collected
RF energy, without using battery to be powered come the operation to system, this not only simplifies the design of system hardware,
It enables the system to for a long time from maintenance.
Technical proposal that the invention solves the above-mentioned problems is: a kind of mixed wireless network is characterized in that
Include Anneta module, the first radio-frequency switch array, matching impedance module, backscattering impedance module, the second radio frequency
Switch arrays, data collection module, energy collection module, data transmission module, energy storage units, single-chip microcontroller and protection circuit
Module；
The Anneta module by the first radio-frequency switch array respectively with matching impedance module, backscattering impedance module
One end connects or disconnects；Matching impedance module, backscattering impedance module the other end can pass through the second radio-frequency switch array point
One end not with data collection module, energy collection module, data transmission module connects or disconnects；Data collection module, energy
Collection module, data transmission module the other end connect respectively with energy storage units；Single-chip microcontroller and protection circuit module difference
Connect with the first radio-frequency switch array, the second radio-frequency switch array, data collection module, data transmission module, energy storage units
It connects；
The Anneta module is for electromagnetic signals and receives electromagnetic wave signal；
The effect of matching impedance module is the input impedance phase for making the output impedance and energy collection module of Anneta module
Match；
The effect of data collection module is to demodulate data entrained in radiofrequency signal, and further make at filtering
Reason removes the noise for including in data.If demodulating the data come is analog signal, data collection module turns it
It is changed to digital signal, and data inputting into single-chip microcontroller.If demodulating the data itself come is digital signal, to make phase
The Digital Signal Processing of pass, and data inputting into single-chip microcontroller；
The effect of energy collection module is that radiofrequency signal is converted to DC signal；
The effect of data transmission module is that data are sent out；
Energy storage units module is for storing the RF energy being collected into, and supplying to entire mixed wireless network should be able to
Amount；
One-chip computer module is for controlling and optimizing whole system；Circuit module is protected to realize to entire mixed wireless network work
Make the real time monitoring and protection of state.
Further, above-mentioned energy collection module includes radio frequency-DC rectifier, filter circuit and voltage regulator circuit.
Further, above-mentioned data transmission module includes digital analog converter.
Further, above-mentioned backscattering load impedance includes the load impedance array of N number of different impedance values.
Further, above-mentioned backscattering load impedance includes two kinds of load impedances, and two kinds of load impedances are respectively Z0With
Z1。
In addition, the present invention also proposes a kind of working method of above-mentioned mixed wireless network, it is characterized in that, including penetrate
Frequency collection of energy step and backscatter communication step:
The RF energy collection step includes:
1.1) using the on-off of one-chip computer module control the first radio-frequency switch array and the second radio-frequency switch array, make antenna
Module, matching impedance module, energy collection module are connected with energy storage units；
1.2) antenna receives the radiofrequency signal in environment space, and is converted to the analog electrical signal of high frequency；
1.3) matching impedance module maximizes the energy of the radiofrequency signal received；
1.4) rf signal is converted DC signal by energy collection module；
1.5) DC signal charges to energy storage units, realizes collection of energy；
The backscatter communication step includes:
2.1) all off using one-chip computer module the second radio-frequency switch array of control；
Data to transmission are " 0 ", using single-chip microcontroller control the first radio frequency array switch on-off, make Anneta module with
Load impedance Z0It is connected, after radiofrequency signal is sent to the Anneta module of mixed wireless network, the signal that reflects back outward
It is:
Vref0=η0 Vin；
Wherein, VinIndicate incoming signal, η0Correspond to load impedance Z0Antenna reflection coefficient；
Data to transmission are " 1 ", using single-chip microcontroller control the first radio frequency array switch on-off, make Anneta module with
Load impedance Z1Be connected, when radiofrequency signal (radiofrequency signal in ambient radio-frequency signal or specific, radio-frequency signal source) be sent to it is mixed
After the antenna for closing wireless network, the signal reflected back is:
Vref1=η1 Vin；
Wherein, VinIndicate incoming signal, η1Correspond to load impedance Z1Antenna reflection coefficient；
2.2) backscatter receiver judges the signal received, if the signal received is Vref0, then accordingly
Data be " 0 "；If the signal received is Vref1, then corresponding data are " 1 ".
Advantages of the present invention: a kind of mixed wireless network of the present invention is collected RF energy and backscatter communication function
It is integrated in same system simultaneously, by controlling the switching of radio-frequency switch array, mixed wireless network can dynamically change it
Operating mode, so that the flexibility of system greatly increases, therefore can be applied on more different application scenarios, such as:
Recognize backscatter communication；Single layer backscatter communication；The backscattering and active communication of equipment and equipment room；In backscattering
After communication；The present invention realizes self sustainable supply (that is, " passive ") of energy by RF energy collecting function, and
And substantially reducing for communication process energy consumption is realized by backscatter communication.
Detailed description of the invention
Fig. 1 is mixed wireless network structure chart of the present invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the present invention of protection is sought, but is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts belongs to this
Invent the range of protection.
Referring to Fig. 1, a kind of mixed wireless network, comprising Anneta module, the first radio-frequency switch array, matching impedance module,
Backscattering impedance module, the second radio-frequency switch array, data collection module, energy collection module, data transmission module, energy
Storage unit, single-chip microcontroller and protection circuit module.
First radio-frequency switch array is the switch arrays B in Fig. 1, and the second radio-frequency switch array is the switch in Fig. 1
Array S.
The Anneta module by the first radio-frequency switch array respectively with matching impedance module, backscattering impedance module
One end connects or disconnects；Matching impedance module, backscattering impedance module the other end can pass through the second radio-frequency switch array point
One end not with data collection module, energy collection module, data transmission module connects or disconnects；Data collection module, energy
Collection module, data transmission module the other end connect respectively with energy storage units；Single-chip microcontroller and protection circuit module difference
Connect with the first radio-frequency switch array, the second radio-frequency switch array, data collection module, data transmission module, energy storage units
It connects.
The Anneta module is for electromagnetic signals and receives electromagnetic wave signal.During active communication, antenna
Module can be changed into the electric current or guided wave of high frequency radio wave, that is, Free Electromagnetic wave as transmitting antenna, generation from
It can be radiated from electromagnetic wave to spatial peripheral.When Anneta module is as receiving antenna, it can be the electromagnetism received
Wave is converted to high-frequency current, thus the data carried in the energy of electromagnetic wave absorption or reception electromagnetic wave.For different frequency
Electromagnetic wave signal, the design of antenna is generally different.Therefore, the antenna in mixed wireless network should be according to specific work frequency
Rate specially designs.
The effect of matching impedance module is that the impedance of Anneta module and the input impedance of energy collection module is made to match.When
When the impedance of the two is mutually matched, the frequency analog electric signal exported from Anneta module can then be fully transmitted to energy stores
In module, any reflected voltage is not generated, to obtain maximum energy.
Backscattering load impedance module is parallel with matching impedance module position, which includes two kinds of load impedance Z0
And Z1.It is communicated in the embodiment of the present invention for two-state, i.e., communication process can only transmit two kinds of data (" 0 " and " 1 ").
According to the difference of application scenarios, backscattering load impedance module can also be configured to the load comprising N number of different impedance values
Impedance array (Z0, Z1..., Zn-1)。
The effect of data collection module is to extract data entrained in radiofrequency signal, and be converted into digital electric signal.Through
The processing of the module is crossed, the information for including in radiofrequency signal is converted into digital electric signal, these digital electric signals can be stored
Into single-chip microcontroller.
The effect of energy collection module is that radiofrequency signal is converted to DC signal.Energy collection module includes radio frequency-
The hardware circuits such as DC rectifier, filter circuit and voltage regulator circuit.
The effect of data transmission module is that data are sent out.From single-chip microcontroller digital signal in this module quilt
It is modulated in carrier signal, the carrier signal of generation carries the information for needing to transmit, it can be launched outward by antenna, realizes
Active communication process.The hardware circuits such as digital analog converter can be included in the module.
Energy storage units module is for storing the RF energy being collected into, and supplying to entire mixed wireless network should be able to
Amount.Can also have power management circuit in energy storage module, so that the electric energy in system can be managed well.
For one-chip computer module for controlling and optimizing whole system, its work provides energy by energy storage module.The list
Piece machine module must have the data-handling capacity of high speed, and according to circumstances can quickly select corresponding operation；Protection electricity
Road module realizes the real time monitoring and protection to entire mixed wireless network working condition.
Verifying of this experiment by emulation and experiment, it was demonstrated that the mixed wireless network can receive 10 millis within the scope of 1 meter
Watt power.At the same time, the two-way backscatter communication which also may be implemented 100kbps, distance is 1 meter.
In addition, the present invention also proposes a kind of working method of above-mentioned mixed wireless network, including RF energy collection step
With backscatter communication step:
The RF energy collection step includes:
1.1) letter of the digital output port of one-chip computer module and the first radio-frequency switch array and the second radio-frequency switch array
The connection of number access interface, single-chip microcontroller can export the first radio-frequency switch array of Digital Signals with certain amplitude size and the
The on-off of two radio-frequency switch arrays, so that radio-frequency switch array B and radio-frequency switch array S are switched to: B1And S2, make Anneta module,
Matching impedance module, energy collection module are connected with energy storage units；
1.2) antenna receive environment space in radiofrequency signal (such as: base station signal, Wi-Fi hotspot signal, television set letter
Number), and it is converted to the analog electrical signal of high frequency；If what mixed wireless network was collected is penetrating of issuing from specialized radio frequency signal source
Frequency signal, then antenna needs the frequency of the radiofrequency signal issued according to the signal source to be designed.When specialized radio frequency signal source
After the radiofrequency signal of sending reaches antenna, it can be also converted to the analog electrical signal of high frequency by antenna.
1.3) the frequency analog electric signal obtained from step 1.2) can reach collection of energy mould by matching impedance module
Block, matching impedance module make the energy for reaching the analog electrical signal of energy collection module maximum.
1.4) analog electrical signal arrival is converted to DC signal by energy collection module；
1.5) DC signal charges to energy storage units, realizes collection of energy；
Backscatter communication can use specialized radio frequency signal or ambient radio-frequency signal (such as: WiFi signal, base station letter
Number etc.) Lai Jinhang.The backscatter communication step includes:
2.1) letter of the digital output port of one-chip computer module and the first radio-frequency switch array and the second radio-frequency switch array
Number access interface is connected, and single-chip microcontroller by exporting there is the Digital Signals radio-frequency switch array B of specific amplitude to switch on
B2And B3Between, and disconnect radio-frequency switch array S (being not exposed to any one contact)；
Data to transmission are " 0 ", using single-chip microcontroller control the first radio frequency array switch on-off, make Anneta module with
Load impedance Z0It is connected, after radiofrequency signal is sent to the Anneta module of mixed wireless network, the signal that reflects back outward
It is:
Vref0=η0Vin；
Wherein, VinIndicate incoming signal, η0Correspond to load impedance Z0Antenna reflection coefficient；
Data to transmission are " 1 ", using single-chip microcontroller control the first radio frequency array switch on-off, make Anneta module with
Load impedance Z1Be connected, when radiofrequency signal (radiofrequency signal in ambient radio-frequency signal or specific, radio-frequency signal source) be sent to it is mixed
After the antenna for closing wireless network, the signal reflected back is:
Vref1=η1 Vin；
Wherein, VinIndicate incoming signal, η1Correspond to load impedance Z1Antenna reflection coefficient；
2.2) backscatter receiver judges the signal received, if the signal received is Vref0, then accordingly
Data be " 0 "；If the signal received is Vref1, then corresponding data are " 1 ".
By backscatter communication process, mixed wireless network realizes the passive communication of data.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant systems
Domain is commanded, is included within the scope of the present invention.
Claims (6)
1. a kind of mixed wireless network, it is characterised in that:
Include Anneta module, the first radio-frequency switch array, matching impedance module, backscattering impedance module, the second RF switch
Array, data collection module, energy collection module, data transmission module, energy storage units, one-chip computer module and protection circuit
Module；
The Anneta module passes through the first radio-frequency switch array one end with matching impedance module, backscattering impedance module respectively
It connects or disconnects；Matching impedance module, backscattering impedance module the other end can by the second radio-frequency switch array respectively with
Data collection module, energy collection module, data transmission module one end connect or disconnect；Data collection module, collection of energy
Module, data transmission module the other end connect respectively with energy storage units；Single-chip microcontroller and protection circuit module are respectively with the
One radio-frequency switch array, the second radio-frequency switch array, data collection module, data transmission module, energy storage units connection；
The Anneta module is for electromagnetic signals and receives electromagnetic wave signal；
The effect of matching impedance module is that the impedance of Anneta module and the input impedance of energy collection module is made to match；
The effect of data collection module is to extract data entrained in radiofrequency signal, and be converted into digital electric signal；
The effect of energy collection module is that radiofrequency signal is converted to DC signal；
The effect of data transmission module is that data are sent out；
Energy storage units module gives entire mixed wireless network supplying energy for storing the RF energy being collected into；
One-chip computer module is for controlling and optimizing whole system；Circuit module is protected to realize to entire mixed wireless network work shape
The real time monitoring and protection of state.
2. a kind of mixed wireless network according to claim 1, it is characterised in that: the energy collection module includes penetrating
Frequently-DC rectifier, filter circuit and voltage regulator circuit.
3. a kind of mixed wireless network according to claim 1, it is characterised in that: the data transmission module includes digital-to-analogue
Converter.
4. a kind of mixed wireless network according to any one of claims 1 to 3, it is characterised in that: the backscattering load
Impedance includes the load impedance array of N number of different impedance values.
5. a kind of mixed wireless network according to claim 4, it is characterised in that: the backscattering load impedance includes
Two kinds of load impedances, two kinds of load impedances are respectively Z0And Z1。
6. a kind of working method of mixed wireless network, it is characterised in that: described to include RF energy collection step and reversely dissipate
Penetrate communication steps:
The RF energy collection step includes:
1.1) using the on-off of one-chip computer module control the first radio-frequency switch array and the second radio-frequency switch array, make antenna mould
Block, matching impedance module, energy collection module are connected with energy storage units；
1.2) antenna receives the radiofrequency signal in environment space, and is converted to the analog electrical signal of high frequency；
1.3) matching impedance module makes the energy of analog electrical signal maximum；
1.4) radiofrequency signal is converted to DC signal by energy collection module；
1.5) DC signal charges to energy storage units, realizes collection of energy；
The backscatter communication step includes:
2.1) all off using one-chip computer module the second radio-frequency switch array of control；
Data to transmission are " 0 ", control the first radio frequency array using single-chip microcontroller and switch on-off, make Anneta module and load
Impedance Z0It is connected, after radiofrequency signal is sent to the Anneta module of mixed wireless network, the signal reflected back outward is:
Vref0=η0Vin；
Wherein, VinIndicate incoming signal, η0Correspond to load impedance Z0Antenna reflection coefficient；
Data to transmission are " 1 ", control the first radio frequency array using single-chip microcontroller and switch on-off, make Anneta module and load
Impedance Z1It is connected, when radiofrequency signal (radiofrequency signal in ambient radio-frequency signal or specific, radio-frequency signal source) is sent to mixing nothing
After the antenna of gauze network, the signal reflected back is:
Vref1=η1Vin；
Wherein, VinIndicate incoming signal, η1Correspond to load impedance Z1Antenna reflection coefficient；
2.2) backscatter receiver judges the signal received, if the signal received is Vref0, then corresponding data
It is " 0 "；If the signal received is Vref1, then corresponding data are " 1 ".
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473052.5A CN109450478A (en) | 2018-12-04 | 2018-12-04 | A kind of mixed wireless network and working method |
| PCT/CN2019/121502 WO2020114304A1 (en) | 2018-12-04 | 2019-11-28 | Hybrid wireless network and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473052.5A CN109450478A (en) | 2018-12-04 | 2018-12-04 | A kind of mixed wireless network and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109450478A true CN109450478A (en) | 2019-03-08 |
Family
ID=65556279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811473052.5A Pending CN109450478A (en) | 2018-12-04 | 2018-12-04 | A kind of mixed wireless network and working method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109450478A (en) |
| WO (1) | WO2020114304A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114304A1 (en) * | 2018-12-04 | 2020-06-11 | 中国科学院深圳先进技术研究院 | Hybrid wireless network and working method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023003548A1 (en) * | 2021-07-21 | 2023-01-26 | Hewlett-Packard Development Company, L.P. | Electrical energy harvesting from radio frequency signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2648463A2 (en) * | 2012-04-05 | 2013-10-09 | Ricoh Company, Ltd. | Low power radio frequency communication |
| CN103714359A (en) * | 2013-07-25 | 2014-04-09 | 范志广 | Radio frequency identification method and system based on wireless communication terminal |
| US20150091706A1 (en) * | 2013-09-30 | 2015-04-02 | Sergey Chemishkian | Real-time wireless power transfer control for passive backscattering devices |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450478A (en) * | 2018-12-04 | 2019-03-08 | 中国科学院深圳先进技术研究院 | A kind of mixed wireless network and working method |
-
2018
- 2018-12-04 CN CN201811473052.5A patent/CN109450478A/en active Pending
-
2019
- 2019-11-28 WO PCT/CN2019/121502 patent/WO2020114304A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2648463A2 (en) * | 2012-04-05 | 2013-10-09 | Ricoh Company, Ltd. | Low power radio frequency communication |
| CN103714359A (en) * | 2013-07-25 | 2014-04-09 | 范志广 | Radio frequency identification method and system based on wireless communication terminal |
| US20150091706A1 (en) * | 2013-09-30 | 2015-04-02 | Sergey Chemishkian | Real-time wireless power transfer control for passive backscattering devices |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114304A1 (en) * | 2018-12-04 | 2020-06-11 | 中国科学院深圳先进技术研究院 | Hybrid wireless network and working method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020114304A1 (en) | 2020-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Niyato et al. | Wireless powered communication networks: Research directions and technological approaches | |
| CN102318215B (en) | The antenna of wireless power supply is shared | |
| CN105262513B (en) | A kind of NFC active communication interface with high transmitting power | |
| CN102999776A (en) | Contactless integrated circuit having NFC and UHF operating modes | |
| CN104737459A (en) | Device detection using load modulation in near-field communications | |
| CN105897312B (en) | A kind of NFC label interface for energy acquisition and small size optimization | |
| US9161160B2 (en) | Wireless communication system | |
| CN109450478A (en) | A kind of mixed wireless network and working method | |
| CN105007092A (en) | 2.4 GHz wireless communication module supporting WIA-PA standard | |
| CN207910774U (en) | Power line carrier and wireless double mode formula communication module | |
| CN201904628U (en) | Wireless charging and network integration device | |
| CN205432793U (en) | Filing cabinet and file management and control device based on radio frequency identification RFID | |
| CN102832961A (en) | Multi-band signal transceiving device | |
| CN209046629U (en) | A kind of channel reception device based on millimeter wave | |
| CN209488580U (en) | Frequency range switching device and system | |
| CN105353627B (en) | CPLD-based intelligent wireless access device for optical fiber converter module | |
| CN107579766A (en) | The relay transmission system based on short-range communication based on bandpass filter | |
| CN209861174U (en) | Passive indoor distribution system | |
| CN204948066U (en) | A kind of NFC active communication interface with high transmit power | |
| CN207869408U (en) | A kind of Rechargeable wireless sensor network nodes | |
| CN207993148U (en) | A kind of intelligent electric energy meter interactive device | |
| CN204576777U (en) | Bluetooth turns wireless communication module | |
| CN104507040A (en) | Low-power-consumption remote transmission system and control method thereof | |
| CN207427099U (en) | A kind of L-band ultra wide band receives and dispatches amplifier | |
| CN209248749U (en) | Collector and acquisition system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190308 |