CN207339849U - A kind of small energy and signal wireless transmission system of the work of short distance multiband - Google Patents
A kind of small energy and signal wireless transmission system of the work of short distance multiband Download PDFInfo
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- CN207339849U CN207339849U CN201721090359.8U CN201721090359U CN207339849U CN 207339849 U CN207339849 U CN 207339849U CN 201721090359 U CN201721090359 U CN 201721090359U CN 207339849 U CN207339849 U CN 207339849U
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Abstract
The utility model provides a kind of small energy and signal wireless transmission system of the work of short distance multiband,Transmitting terminal signal source is D/C power,Direct current is converted to alternating current by D/C power transmitting signal by DC AC converters,Alternating current launches signal by No. 1 antenna after circulator by transmitting terminal,Signal reaches No. 2 antennas of receiving terminal through medium,No. 2 received signals of antenna reach rectifier after low-frequency filter filters,Signal is converted to direct current by rectifier from alternating current,Power for low-noise amplifier,The reception antenna of receiving terminal is amplified after receiving signal of communication by low-noise amplifier,Amplified signal is launched after entering No. 2 antennas by the circulator of receiving terminal,After No. 1 antenna of receiving terminal receives signal of communication,It is filtered by circulator into high frequency filter,Filtered signal reaches receiver.The field coupling merged between Mutual Inductance Coupling transmission and parallel plate capacitor between coil transmits two kinds of transmission modes so that the efficiency of double frequency transmission is greatly improved in the case where device cumulative volume is constant.
Description
Technical field
The present invention relates to wireless transmitting system, the wireless transmitting system of especially a kind of electric energy and electromagnetic signal.
Background technology
The implementation of wireless energy transfer substantially divides three kinds, i.e., based on electromagnetic induction, based on magnetic resonance coupling and is based on
The wireless energy transmission technology of microwave or femtosecond laser.Electromagnetic induction or magnetic resonance coupling are used for short-range energy transmission
Theory designs transmitting reception antenna, but coil dimension used in the method for near field magnetic coupling is big, and transmission efficiency is low, is not suitable for
It is vehicle-mounted.In terms of multi-frequency radio transmission, to reach in the impedance matching at the same time of two frequencies, generally transmitted respectively using multiple coils
Different frequency signals energy, and parasitic couplings caused by multiple coil simultaneous transmission different frequency energy seriously reduce energy
Efficiency of transmission and aggrandizement apparatus cumulative volume.Found through the literature search to the prior art, W Wei in 2013 et al. are in IEEE
Transactions on Antennas&Propagation,2013,62(1):411-419 has delivered " Characteristic
Analysis of Double Spiral Resonator for Wireless Power Transmission ", it is proposed that can
Farthest 20 centimetres of efficient energy transmission, efficiency of transmission 95%, but two coil diameters are realized up to 30 centimetres in 13.56MHz,
And can not realize multi-frequency energy transmission, it is difficult to realize application on automobile.D Ahn in 2016 et al. are in IEEE
Transactions on Power Electronics,2016,31(7):" Wireless Power have been delivered on 5018-5029
Transfer With Concurrent 200-kHz and 6.78-MHz Operation in a Single-
Transmitter Device ", are wirelessly transferred the energy of two frequencies, it is proposed that Yi Zhongxin at the same time using two sets of coils in literary
The efficiency that parasitics between two sets of coils and eddy-current loss produce is reduced and minimized by circuit topology, and as low as 1.3% arrives
4.2%, while energy transform device total size only increases by 10%.Realize 25mm apart from when, 6.78MHz and 200kHz double frequencies
Efficiency of transmission can reach 78% and 70.6%.But device total size still has 12.5 × 8.9 square centimeters, and new topology address only hair
The area for penetrating or receiving certain one end saves problem, and low-frequency range energy transmission efficiency is undesirable, and energy charge is larger.
The content of the invention
For overcome the deficiencies in the prior art, the present invention is under the transmission environment near field, due to the characteristic of electromagnetic coupled, contracting
The size of small transmitting receiving coil can reduce the efficiency of transmission of the efficiency of transmission, especially low-frequency range of electric energy, then in electromagnetism coupling
Field coupling is added on the basis of conjunction, that is, increases the area of winding wire, hollow radius is reduced and is received so as to increase transmitting
Hold facing area so that in the case where not increasing volume, capacitance becomes larger, and capacitive reactance reduces, final to improve entirety, especially low frequency
The energy transmission efficiency of section.
The technical solution adopted by the present invention to solve the technical problems is：The small-sized energy of the short distance multiband work
In amount and signal wireless transmission system, transmitting terminal signal source is D/C power, and D/C power launches signal will be straight by DC-DC converter
Galvanic electricity is converted to alternating current, and alternating current launches signal by No. 1 antenna after circulator by transmitting terminal, and signal is arrived through medium
Up to No. 2 antennas of receiving terminal, No. 2 received signals of antenna reach rectifier after low-frequency filter filters, and rectifier will be believed
Number direct current is converted to from alternating current, powered for low-noise amplifier, the reception antenna of receiving terminal leads to after receiving signal of communication
Cross low-noise amplifier to be amplified, amplified signal is launched after entering No. 2 antennas by the circulator of receiving terminal, receiving terminal
No. 1 antenna receive signal of communication after, be filtered by circulator into high frequency filter, filtered signal is reached and connect
Receipts machine.
The multiturn helical annulus of No. 1 antenna and No. 2 antennas for printing on circuit boards, the interval between annulus are less than
The hollow radius of conductor width, conductor width 1mm, and helical annulus is less than No. 1 antenna and No. 2 whole annular radiis of antenna
1/3, No. 1 antenna and No. 2 antenna parallels are placed.
The beneficial effects of the invention are as follows due to having merged the electricity between the transmission of the Mutual Inductance Coupling between coil and parallel plate capacitor
Field two kinds of transmission modes of coupled transfer so that the efficiency of double frequency transmission obtains carrying greatly very much in the case where device cumulative volume is constant
It is high.
Brief description of the drawings
Fig. 1 is wireless charging system functional block diagram of the present invention, and wherein LNA is low-noise amplifier.
Fig. 2 is wireless charging system circuit theory schematic diagram of the present invention.
Fig. 3 is the connection diagram of the embodiment of the present invention.
Fig. 4 (a) is that the present invention is 4.9cm in No. 1 antenna and No. 2 antenna radius, the input return loss when number of turn is 24,
Fig. 4 (b) is that the present invention is 4.9cm in No. 1 antenna and No. 2 antenna radius, the positive transmission coefficient when number of turn is 24.
Fig. 5 (a) is the embodiment of the present invention in the input return loss of 10MHz-250MHz, and Fig. 5 (b) is the embodiment of the present invention
In the positive transmission coefficient of 10MHz-250MHz, Fig. 5 (c) is that output echo of the embodiment of the present invention in 10MHz-250MHz damages
Consumption.
Fig. 6 (a) is input return loss of the embodiment of the present invention in 1400MHz-1450MHz, and Fig. 6 (b) is real for the present invention
Positive transmission coefficient of the example in 1400MHz-1450MHz is applied, Fig. 6 (c) is the embodiment of the present invention in the defeated of 1400MHz-1450MHz
Go out return loss.
Wherein, 1- transmiting signal sources, 2- transmitting terminal dissipative cells, 3- transmitting terminal circulators, 4- transmitting coils, 5- receive line
Circle, 6- receiving terminal circulators, 7- receiving terminal dissipative cells, 8- signal receiving antennas.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
The present embodiment is implemented under premised on technical solution of the present invention, gives detailed embodiment and specific
Operating process, but protection scope of the present invention is not limited to following embodiments.
Transmitting terminal signal source is D/C power, and direct current is converted to exchange by D/C power transmitting signal by DC-DC converter
Electricity, alternating current launch signal by No. 1 antenna after circulator by transmitting terminal, and signal reaches No. 2 of receiving terminal through medium
Antenna, No. 2 received signals of antenna reach rectifier after low-frequency filter filters, and rectifier changes signal from alternating current
For direct current, power for low-noise amplifier, the reception antenna of receiving terminal passes through low-noise amplifier after receiving signal of communication
It is amplified, amplified signal is launched after entering No. 2 antennas by the circulator of receiving terminal, and No. 1 antenna of receiving terminal receives
To after signal of communication, it is filtered by circulator into high frequency filter, filtered signal reaches receiver.
There is two paths of signals in the present system, be respectively energy signal and signal of communication, as described in Figure 1, two paths of signals is all each
Sent after capturing the signal of communication of 1.47GHz from the reception antenna via No. 1 antenna and No. 2 antennas being placed in parallel, receiving terminal
It is amplified to low-noise amplifier, then by No. 1 antenna and No. 2 antenna transmissions to high frequency filter, finally reaches receiver,
Receiver extracts useful information by signal is demodulated.And D/C power provides direct current, the shape after DC-DC converter converts
Into 200MHz alternating currents, then after reaching the low-frequency filter of receiving terminal by No. 1 antenna and No. 2 antenna transmissions, by rectifier
It is direct current by exchange Electrical change, and powers for low-noise amplifier.The system is due to the limitation of instrument size, only with No. 1
Antenna and No. 2 antenna a pair of antennas, so need to be integrated and shunted when signal passes in and out No. 1 antenna and No. 2 antennas, so
Receiving terminal is respectively provided with a circulator with transmitting terminal, and the energy signal of 200MHz and the information signal of 1.47GHz are at circulator
Integrate, and punish and flow in another circulator, while launch signal and pass through emitted energy signal after transmitting terminal connection circulator, ring
Row device is isolated 200MHz energy signals with the dissipative cell in the receiver and high frequency filter of transmitting terminal, i.e. transmitting letter
The energy signal in number source does not form path with the dissipative cell in transmitting terminal receiver and high frequency filter, only passes through No. 1 antenna
It is transmitted, similarly, No. 2 antennas connect circulators by the low-noise amplifier in 200MHz energy signals and receiving terminal and reception
The dissipative cell of antenna is isolated.
The multiturn helical annulus of No. 1 antenna and No. 2 antennas for printing on circuit boards, the interval between annulus are less than
The hollow radius of conductor width, conductor width 1mm, and helical is less than the 1/3 of No. 1 antenna and No. 2 whole annular radiis of antenna,
No. 1 antenna and No. 2 antenna parallels are placed and relative distance is 5mm；The coil turn of No. 1 antenna and No. 2 antennas is more, coil compared with
Close and middle is hollow small, so as to obtain less capacitance.
Wireless charging system circuit theory schematic diagram of the present invention is as shown in Fig. 2, antenna 1 passes through combined magnetic field coupling with antenna 2
Close with field coupling to improve the efficiency of transmission of electric energy, i.e. antenna 1 both can be considered that the helical antenna being placed adjacent passed through with antenna 2
Transmission energy is carried out in the magnetic field of conversion, and can be considered the tablet that opposition is placed, and energy transmission is carried out by the electric field change between tablet.
Fig. 3 is the connection diagram of the embodiment of the present invention.
Fig. 4 (a) is that the present invention is 4.9cm in No. 1 antenna and No. 2 antenna radius, the input return loss when number of turn is 24,
Fig. 4 (b) is that the present invention is 4.9cm in No. 1 antenna and No. 2 antenna radius, the positive transmission coefficient when number of turn is 24.
Fig. 5 (a) is the embodiment of the present invention in the input return loss of 10MHz-250MHz, and Fig. 5 (b) is the embodiment of the present invention
In the positive transmission coefficient of 10MHz-250MHz, Fig. 5 (c) is that output echo of the embodiment of the present invention in 10MHz-250MHz damages
Consumption.
Fig. 6 (a) is input return loss of the embodiment of the present invention in 1400MHz-1450MHz, and Fig. 6 (b) is real for the present invention
Positive transmission coefficient of the example in 1400MHz-1450MHz is applied, Fig. 6 (c) is the embodiment of the present invention in the defeated of 1400MHz-1450MHz
Go out return loss.
When transmitter works, electromagnetic energy reaches No. 1 antenna by receiving terminal circulator, and No. 1 antenna forms the magnetic line of force, should
The magnetic line of force passes through No. 2 antennas, and when the electromagnetic signal of transmitter transmitting changes over time, sensing will be produced in No. 2 antennas
Electromotive force, and sensing electric current is formed, and current loop is formed with the receiving terminal dissipative cell, so as to be receiving terminal energy consumption member
Part charges.At the same time, electric field can be also formed between No. 1 antenna and No. 2 antennas, when the electromagnetic signal of transmitter transmitting is with the time
During change, displacement current can be produced between No. 1 antenna and No. 2 antennas, so as to cause the total amount of electric charge on No. 2 antennas to become with the time
Change, so as to produce electric current, flow to the receiving terminal dissipative cell.When signal receiving antenna works, electromagnetic energy passes through No. 1 antenna
Be transmitted to No. 2 antennas, while electric field formed between No. 1 antenna and No. 2 antennas and produces displacement current, with transmitting terminal dissipative cell with
And ground forming circuit, so as to charge for transmitting terminal dissipative cell.No. 1 antenna and No. 2 antennas have high in multiple frequency ranges
Energy transmission efficiency, so as to ensure the efficiency of transmission of the double frequency energy signal transmission of 200MHz and 1.47GHz.
Simulation result shows, under the conditions of the suitable number of turn and coil radius, low-frequency range and 1465MHz~1475MHz frequencies
The return loss of section is less than -10dB, and carry-over factor, close to 100%, is -2dB in 1465MHz~1475MHz frequency ranges in low-frequency range.
Claims (1)
1. a kind of small energy and signal wireless transmission system of the work of short distance multiband, it is characterised in that：
In the small energy and signal wireless transmission system of the short distance multiband work, transmitting terminal signal source is DC electricity
Source, D/C power launch signal and direct current are converted to alternating current by DC-DC converter, alternating current by after circulator by hair
No. 1 antenna transmitting signal at end is penetrated, signal reaches No. 2 antennas of receiving terminal through medium, and No. 2 received signals of antenna are through too low
Rectifier is reached after frequency filter filtering, signal is converted to direct current by rectifier from alternating current, is powered for low-noise amplifier,
The reception antenna of receiving terminal is amplified after receiving signal of communication by low-noise amplifier, and amplified signal passes through reception
The circulator at end is launched after entering No. 2 antennas, after No. 1 antenna of receiving terminal receives signal of communication, pass through circulator enter it is high
Frequency wave filter is filtered, and filtered signal reaches receiver；
The multiturn helical annulus of No. 1 antenna and No. 2 antennas for printing on circuit boards, the interval between annulus are less than conducting wire
The hollow radius of width, conductor width 1mm, and helical annulus is less than the 1/3 of No. 1 antenna and No. 2 whole annular radiis of antenna,
No. 1 antenna and No. 2 antenna parallels are placed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090359.8U CN207339849U (en) | 2017-08-29 | 2017-08-29 | A kind of small energy and signal wireless transmission system of the work of short distance multiband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090359.8U CN207339849U (en) | 2017-08-29 | 2017-08-29 | A kind of small energy and signal wireless transmission system of the work of short distance multiband |
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| CN207339849U true CN207339849U (en) | 2018-05-08 |
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| CN201721090359.8U Expired - Fee Related CN207339849U (en) | 2017-08-29 | 2017-08-29 | A kind of small energy and signal wireless transmission system of the work of short distance multiband |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232523A1 (en) * | 2020-05-21 | 2021-11-25 | 深圳市知用电子有限公司 | Isolated signal transmission apparatus |
| WO2024055399A1 (en) * | 2022-09-17 | 2024-03-21 | 德氪微电子(深圳)有限公司 | Millimeter wave isolation device |
-
2017
- 2017-08-29 CN CN201721090359.8U patent/CN207339849U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232523A1 (en) * | 2020-05-21 | 2021-11-25 | 深圳市知用电子有限公司 | Isolated signal transmission apparatus |
| US11881639B2 (en) | 2020-05-21 | 2024-01-23 | Shenzhen Zhiyong Electronics Co., Ltd. | Signal isolation and transmission device |
| WO2024055399A1 (en) * | 2022-09-17 | 2024-03-21 | 德氪微电子(深圳)有限公司 | Millimeter wave isolation device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180508 Termination date: 20180829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |