CN208908025U - Applied to triple-frequency harmonics antenna structure in wireless power transfer - Google Patents
Applied to triple-frequency harmonics antenna structure in wireless power transfer Download PDFInfo
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Abstract
The utility model relates to one kind to be applied to triple-frequency harmonics antenna structure in wireless power transfer.Charge pump includes identical first, second voltage multiplie；Voltage multiplie includes concatenated first, second diode, first, second diode both ends parallel connection first capacitor, first diode anode provides load negative voltage, first diode cathode connects the second diode cathode, second diode cathode ground connection, electrode points are connected with the second capacitor between first, second diode, and the second capacitor is as the first voltage multiplie input terminal；First voltage multiplie exports negative voltage and the second voltage multiplie output positive voltage is equivalent；Directional coupler input port connects antenna 1, isolated port connects antenna 2, straight-through port and coupling port and is connected respectively with the second voltage multiplie input terminal, the first voltage multiplie input terminal.The utility model is not required to additionally add feed circuit by the triple-frequency harmonics antenna calibration structure of directional coupler and annular hybrid network, facilitates the realization of compact high efficiency wireless power transmission system.
Description
Technical field
The utility model relates to antenna calibration structures, in particular to are applied to triple-frequency harmonics day knot in wireless power transfer
Structure.
Background technique
Far field wireless power transfer technology promotes wireless sensor network fast development.Highly directional reception, transmitting antenna
Use can be realized wireless power link between base station and wireless sensor network.However, as shown in Figure 1, receiving, transmitting antenna
Between problem of misalignment seriously affect the efficiency of wireless power link.Therefore, wireless power transfer application in, need to receive,
Transmitting antenna is calibrated.
Utility model content
The purpose of the utility model is to provide one kind to be applied to triple-frequency harmonics antenna structure in wireless power transfer, humorous three times
Wave calibration structure includes structure 1 and structure 2.
RECTIFYING ANTENNA in structure 1, including antenna 1, antenna 2, modified Greinacher charge pump and directional coupler；Knot
RECTIFYING ANTENNA in structure 2, including dual-band antenna 1, modified Greinacher charge pump and annular hybrid network；The modified
Greinacher charge pump includes identical first voltage multiplie of circuit structure and the second voltage multiplie；
First voltage multiplie includes the first diode of series aiding connectionD 1With the second diodeD 2, concatenated one or two pole
PipeD 1With the second diodeD 2Both ends parallel connection first capacitorC 1, first diodeD 1Anode provide loadR LNegative voltageV, first
DiodeD 1Cathode connect the second diodeD 2Anode, the second diodeD 2Cathode ground connection, first diodeD 1With the two or two
Pole pipeD 2Between electrode points and the second capacitorC 2One end be connected, the second capacitorC 2The other end as the defeated of the first voltage multiplie
Enter end；
Second voltage multiplie includes the third diode of series aiding connectionD 3With the 4th diodeD 4, concatenated three or two pole
PipeD 3With the 4th diodeD 4Both ends parallel connection third capacitorC 3, the 4th diodeD 4Cathode provide loadR LPositive voltageV+, third
DiodeD 3Cathode connect the 4th diodeD 4Anode, third diodeD 3Plus earth, third diodeD 3With the four or two
Pole pipeD 4Between electrode points and the 4th capacitorC 4One end be connected, the 4th capacitorC 4The other end as the defeated of the second voltage multiplie
Enter end；
The negative voltage of the first voltage multiplie outputVWith the positive voltage of the second voltage multiplie outputV+ equivalent.It is fixed in structure 1
It is respectively input, isolation, straight-through and coupling port to four ports of coupler.The input port of directional coupler connects antenna 1, every
Connect antenna 2 from port, the straight-through port of directional coupler, coupling port respectively with the input terminal of the second voltage multiplie, the first multiplication of voltage
The input terminal of device is connected.Four ports of annular hybrid network are respectively port 1, port 2, port 3 and port 4 in structure 2.Annular
The port 1 of hybrid network connects dual-band antenna 1, the port 2 of annular hybrid network, the input with the second voltage multiplie respectively of port 3
End, the input terminal of the first voltage multiplie are connected, and the port 4 of annular hybrid network connects 50 Ohmic resistances.
The input port of directional coupler connects antenna 1 in the structure 1, and isolated port connects antenna 2.Annular is mixed in structure 2
The port 1 for closing network connects dual-band antenna 1, and the port 4 of annular hybrid network connects 50 Ohmic resistances.
The straight-through of directional coupler, coupling port parallel connection second harmonic inhibit detail in the structure 1；In the structure 2
Port 2, port 3 second harmonic in parallel of annular hybrid network inhibit detail.Second harmonic inhibits detail can be by fundamental frequency
Lower quarter-wave parallel connection short circuit detail is realized.
Problem of misalignment between transmitting, receiving antenna is solved, guarantees to reach receiving antenna power density, improves wireless power transfer
System performance, comprising the following steps:
Step 1)；Antenna 1 receives the electromagnetic wave that identical working frequency antenna 3 emits in the structure 1, and passes through orientation coupling
Clutch is transmitted to the first voltage multiplie and the second voltage multiplie；First voltage multiplie and the second voltage multiplie high efficiency conversion incident electromagnetic wave are extremely
Triple-frequency harmonics is generated while dc power.Dual-band antenna 1 receives identical working frequency dual-band antenna 2 in the structure 2
The electromagnetic wave of transmitting, and the first voltage multiplie and the second voltage multiplie are transmitted to by annular hybrid network；First voltage multiplie and second
Voltage multiplie high efficiency generates triple-frequency harmonics while converting incident electromagnetic wave to dc power.
Step 2；Directional coupler and annular hybrid network have circuit structure periodic feature, in triple-frequency harmonics frequency range
Lower its directional coupler of holding and annular hybrid network feature；First voltage multiplie and the second voltage multiplie generate three times in structure 1
Harmonic wave is all transmitted to directional coupler isolated port, input port and isolated port high degree of isolation, i.e. input port receives
To incident electromagnetic wave to be transmitted to isolated port power be zero；First voltage multiplie and the second voltage multiplie generate three times in structure 2
Harmonic wave is all transmitted to annular hybrid network port 1, and 4 high degree of isolation of port 1 and port, i.e., what port 1 received enters radio
It is zero that magnetic wave, which is transmitted to 4 power of port,；
Step 3)；Triple-frequency harmonics realizes triple-frequency harmonics feedback as triple-frequency harmonics antenna input power.It is oriented in structure 1
Coupler isolated port triple-frequency harmonics, in 2 input power of antenna of triple-frequency harmonics, realizes triple-frequency harmonics feedback as work, and
It is received by triple-frequency harmonics antenna 4；In structure 2 annular 1 triple-frequency harmonics of hybrid network port as work triple-frequency harmonics double wave
The input power of section antenna 1 is realized triple-frequency harmonics feedback, and is received by triple-frequency harmonics dual-band antenna 2；
Step 4) is in identical situation consistent with transmission power, and dislocation is anti-with triple-frequency harmonics between reception, transmitting antenna
Power correlation is presented, to realize antenna calibration by the triple-frequency harmonics feedback power received.Antenna 4 receives in structure 1
Triple-frequency harmonics feedback is related to dislocation angle, and when dislocation angle is zero degree, the triple-frequency harmonics feedback power received is maximum；Structure
Dual-band antenna 2 receives in 2 triple-frequency harmonics feedback and dislocation angle are related, when the angle that misplaces is zero degree, receive three
Subharmonic feedback power is maximum；Therefore structure 1 and structure 2 realize school between reception, transmitting antenna by receiving triple-frequency harmonics feedback
It is quasi-.
Compared with prior art, the beneficial effects of the utility model are through directional coupler and annular hybrid network
Triple-frequency harmonics antenna calibration structure does not need additionally to add feed circuit, facilitates compact high efficiency wireless power transmission system
It realizes.
Detailed description of the invention
The reception of Fig. 1 wireless power transfer technology, transmitting antenna dislocation schematic diagram；
Fig. 2 directional coupler circuit symbol (left side) and annular hybrid network circuit symbol (right side)；
Fig. 3 embodiment 1 has the rectification circuit schematic diagram of triple-frequency harmonics feedback；
Fig. 4 embodiment 2 has the rectification circuit schematic diagram of triple-frequency harmonics feedback；
1 antenna calibration system schematic diagram of Fig. 5 embodiment；
2 antenna calibration system schematic diagram of Fig. 6 embodiment.
Specific embodiment
It is described further below with reference to embodiment and utility model works principle.
Fig. 2 (left side) is that the circuit of directional coupler indicates symbol；As four port networks, if all of the port is matched to 50
Ohm, the input power equal part of input port to straight-through, coupling port；Straight-through, coupling port voltage signal has 90 degree of phase differences,
Input port is isolated with isolated port, i.e., no power transmission to isolated port；The work of the directional coupler is in fundamental wave frequency
Section w0Under scattering parameter matrix can indicate are as follows:
The directional coupler has circuit structure periodic feature, works in triple-frequency harmonics frequency range 3w0Under scattering ginseng
Matrix number can indicate are as follows:
Fig. 2 (right side) is that the circuit of annular hybrid network indicates symbol；As four port networks, if all of the port is matched to
50 ohm, the input power equal part of port 1 to port 2, port 3；Port 2,3 voltage signal of port have 180 degree phase difference, port
1 is isolated with port 4, i.e., no power transmission to port 4；The work of the annular hybrid network is in fundamental wave frequency range w0Lower scattering ginseng
Matrix number can indicate are as follows:
The annular hybrid network has circuit structure periodic feature, works in triple-frequency harmonics frequency range 3w0Under scattering
Parameter matrix can indicate are as follows:
Embodiment 1
Embodiment illustrated in fig. 31 facilitates calculating, it is assumed that the radiofrequency signal that directional coupler input port receives is, according to directional coupler fundamental scatter parameter matrix, directional coupler is straight-through, coupling port radiofrequency signal can
To respectively indicate are as follows:
The output response of non-linear first voltage multiplie and the second voltage multiplie can be described by Taylor expansion, such as formula
(5) output response of the second voltage multiplie of voltage input can indicate in are as follows:
| (7) |
WhereinIt is output response voltage,,,WithIt is Taylor expansion coefficient.According to trigonometric function relationship
cos3 x=(3/4)cosx+(1/4)cos3x, triple-frequency harmonics byIt generates, and the generation of triple-frequency harmonics is with input work
The increase of rate and increase.Therefore, the second voltage multiplie and the first voltage multiplie are directional coupler is straight-through, coupling port generates three times
Harmonic wave can indicate are as follows:
According to directional coupler circuit structure periodic feature, reference formula (2) directional coupler triple-frequency harmonics scattering ginseng
Matrix number, triple-frequency harmonics are directed coupler transfer to input port, isolated port, can indicate are as follows:
From formula (10) and (11) as can be seen that the triple-frequency harmonics that the first voltage multiplie and the second voltage multiplie generate all transmits
To directional coupler isolated port, which realizes that triple-frequency harmonics feedback connects to reach by triple-frequency harmonics antenna 2
Antenna calibration is penetrated in sending and receiving.
In conjunction with the embodiments 1, the system explanation of triple-frequency harmonics antenna calibration method is carried out, 1 antenna calibration system of embodiment is former
Reason figure is as shown in Figure 5.
Antenna 1, antenna 2 it is parallel and be spaced it is identical, it is identical as 4 antenna 3 of identical topology, antenna angles to ensure,
That is q, as shown in Figure 5.Antenna 1 and 3 gain of antenna are related to q, and the smaller gain of q is bigger, and gain reaches maximum when q is zero degree,
It can be expressed as G (q), therefore when 3 transmission power of antenna isP txWhen, power that antenna 1 can receiveP inIt can be according to radar
Equation indicates are as follows:
WhereinIt is corresponding electromagnetic wavelength under fundamental wave working frequency.
The power that antenna 1 receivesP inThe first voltage multiplie and the second voltage multiplie are coupled to by directional coupler, it is assumed that the
The ratio that one voltage multiplie and the second voltage multiplie triple-frequency harmonics account for total power input is k, therefore is determined when whole triple-frequency harmonics are transmitted to
To the power of coupler isolated portP’ isoIt can indicate are as follows:
Input power of the isolated port triple-frequency harmonics as antenna 2, realizes triple-frequency harmonics feedback, and same receiving antenna 4 connects
Receive triple-frequency harmonics feedback, the triple-frequency harmonics power receivedP’ rxIt can be indicated according to radar equation are as follows:
WhereinIt is corresponding electromagnetic wavelength under third harmonic frequencies,It is that triple-frequency harmonics antenna 2 and antenna 4 are right
The antenna gain answered, related to dislocation angle q, the smaller gain of q is bigger, and gain reaches maximum when q is zero degree.
Therefore, by formula (14) as can be seen that triple-frequency harmonics watt level and dislocation that triple-frequency harmonics antenna 4 receives
Angle q is closely related, and when q is zero degree, the triple-frequency harmonics power received reaches maximum, thus realize by triple-frequency harmonics into
Row antenna calibration method.
Embodiment 2
Embodiment illustrated in fig. 42 facilitates calculating, it is assumed that the radiofrequency signal that annular hybrid network port 1 receives is, according to annular hybrid network fundamental scatter parameter matrix, annular hybrid network port 2, port 3 radiofrequency signal
It can be expressed as；
The output response of non-linear first voltage multiplie and the second voltage multiplie can be described by Taylor expansion, such as formula
(15) output response of the second voltage multiplie of voltage input can indicate in are as follows:
| (17) |
WhereinIt is output response voltage,,,WithIt is Taylor expansion coefficient.According to trigonometric function relationship
cos3 x=(3/4)cosx+(1/4)cos3x, triple-frequency harmonics byIt generates, and the generation of triple-frequency harmonics is with input power
Increase and increase.Therefore, the second voltage multiplie and the first voltage multiplie generate humorous three times in annular hybrid network port 2, port 3
Wave can be expressed as；
According to annular hybrid network circuit structure periodic feature, reference formula (4) annular hybrid network triple-frequency harmonics dissipates
Parameter matrix is penetrated, triple-frequency harmonics is transmitted to port 1, port 4 by annular hybrid network, can be expressed as；
From formula (20) and (21) as can be seen that the triple-frequency harmonics that the first voltage multiplie and the second voltage multiplie generate all transmits
To annular hybrid network port 1, the part triple-frequency harmonics by dual-band antenna 1 realize triple-frequency harmonics feedback with reach receive,
Transmitting antenna calibration.
In conjunction with the embodiments 2, the system explanation of triple-frequency harmonics antenna calibration method is carried out, 2 antenna calibration system of embodiment is former
Reason figure is as shown in Figure 6.
Dual-band antenna 1, the gain of dual-band antenna 2 are related to q, and the smaller gain of q is bigger, and gain reaches when q is zero degree
To maximum, facilitate calculating, dual-band antenna 1,2 fundamental wave band antenna gain of dual-band antenna are G (q), triple-frequency harmonics frequency range day
Line gain is G ' (q).Therefore it is when dual-band antenna 2 emits fundamental wave electromagnetic wave powerP txWhen, dual-band antenna 1 can receive
PowerP inIt can be indicated according to radar equation are as follows:
WhereinIt is corresponding electromagnetic wavelength under fundamental wave working frequency.
The power that dual-band antenna 1 receivesP inThe first voltage multiplie and the second multiplication of voltage are coupled to by annular hybrid network
Device, it is assumed that the first voltage multiplie and the second voltage multiplie triple-frequency harmonics account for the ratio of total power input as k, therefore when whole triple-frequency harmonics
It is transmitted to the power of annular hybrid network port 1P’ 1It can indicate are as follows:
Input power of 1 triple-frequency harmonics of port as dual-band antenna 1 realizes triple-frequency harmonics feedback, same two waveband day
Line 2 receives triple-frequency harmonics feedback, the triple-frequency harmonics power receivedP’ rxIt can be indicated according to radar equation are as follows:
WhereinIt is corresponding electromagnetic wavelength under third harmonic frequencies.
Therefore, by formula (14) as can be seen that triple-frequency harmonics watt level and dislocation that triple-frequency harmonics antenna 4 receives
Angle q is closely related, and when q is zero degree, the triple-frequency harmonics power received reaches maximum, thus realize by triple-frequency harmonics into
Row antenna calibration structure.
Claims (4)
1. being applied to triple-frequency harmonics antenna structure in wireless power transfer, which is characterized in that including antenna 1, antenna 2, modified
Greinacher charge pump and directional coupler；
The modified Greinacher charge pump includes identical first voltage multiplie of circuit structure and the second voltage multiplie；
First voltage multiplie includes the first diode of series aiding connectionD 1With the second diodeD 2, concatenated first diodeD 1
With the second diodeD 2Both ends parallel connection first capacitorC 1, first diodeD 1Anode provide loadR LNegative voltageV, the one or two pole
PipeD 1Cathode connect the second diodeD 2Anode, the second diodeD 2Cathode ground connection, first diodeD 1With the second diodeD 2Between electrode points and the second capacitorC 2One end be connected, the second capacitorC 2Input terminal of the other end as the first voltage multiplie；
Second voltage multiplie includes the third diode of series aiding connectionD 3With the 4th diodeD 4, concatenated third diodeD 3
With the 4th diodeD 4Both ends parallel connection third capacitorC 3, the 4th diodeD 4Cathode provide loadR LPositive voltageV+, the three or two pole
PipeD 3Cathode connect the 4th diodeD 4Anode, third diodeD 3Plus earth, third diodeD 3With the 4th diodeD 4Between electrode points and the 4th capacitorC 4One end be connected, the 4th capacitorC 4Input terminal of the other end as the second voltage multiplie；
The negative voltage of the first voltage multiplie outputVWith the positive voltage of the second voltage multiplie outputV+ equivalent；Directional coupler four
Port is respectively input, isolation, straight-through and coupling port；The input port of directional coupler connects antenna 1, and isolated port connects antenna
2, the straight-through port of directional coupler, coupling port the input terminal phase with the input terminal of the second voltage multiplie, the first voltage multiplie respectively
Even.
2. according to claim 1 be applied to triple-frequency harmonics antenna structure in wireless power transfer, which is characterized in that orientation
The straight-through of coupler, coupling port parallel connection second harmonic inhibit detail.
3. being applied to triple-frequency harmonics antenna structure in wireless power transfer, which is characterized in that including dual-band antenna 1, modified
Greinacher charge pump and annular hybrid network；The modified Greinacher charge pump includes circuit structure identical
One voltage multiplie and the second voltage multiplie；
First voltage multiplie includes the first diode of series aiding connectionD 1With the second diodeD 2, concatenated first diodeD 1
With the second diodeD 2Both ends parallel connection first capacitorC 1, first diodeD 1Anode provide loadR LNegative voltageV, the one or two pole
PipeD 1Cathode connect the second diodeD 2Anode, the second diodeD 2Cathode ground connection, first diodeD 1With the second diodeD 2Between electrode points and the second capacitorC 2One end be connected, the second capacitorC 2Input terminal of the other end as the first voltage multiplie；
Second voltage multiplie includes the third diode of series aiding connectionD 3With the 4th diodeD 4, concatenated third diodeD 3
With the 4th diodeD 4Both ends parallel connection third capacitorC 3, the 4th diodeD 4Cathode provide loadR LPositive voltageV+, the three or two pole
PipeD 3Cathode connect the 4th diodeD 4Anode, third diodeD 3Plus earth, third diodeD 3With the 4th diodeD 4Between electrode points and the 4th capacitorC 4One end be connected, the 4th capacitorC 4Input terminal of the other end as the second voltage multiplie；
The negative voltage of the first voltage multiplie outputVWith the positive voltage of the second voltage multiplie outputV+ equivalent, annular hybrid network four
A port is respectively port 1, port 2, port 3 and port 4；The port 1 of annular hybrid network connects dual-band antenna 1, and annular is mixed
Port 2, the port 3 for closing network are connected with the input terminal of the input terminal of the second voltage multiplie, the first voltage multiplie respectively, annular hybrid network
The port 4 of network connects Ohmic resistance.
4. according to claim 3 be applied to triple-frequency harmonics antenna structure in wireless power transfer, which is characterized in that annular
Port 2, port 3 second harmonic in parallel of hybrid network inhibit detail, and second harmonic inhibits detail can be by under fundamental frequency four
/ mono- wavelength parallel connection short circuit detail is realized.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109583000A (en) * | 2018-09-16 | 2019-04-05 | 苏州芯智瑞微电子有限公司 | Applied to triple-frequency harmonics antenna and its calibration method in wireless power transfer |
| CN110752439A (en) * | 2019-11-15 | 2020-02-04 | Oppo广东移动通信有限公司 | Antenna module and terminal |
| CN110797642A (en) * | 2019-11-15 | 2020-02-14 | Oppo广东移动通信有限公司 | Antenna module and terminal |
| CN110829023A (en) * | 2019-11-15 | 2020-02-21 | Oppo广东移动通信有限公司 | Antenna module and terminal |
-
2018
- 2018-09-16 CN CN201821509693.7U patent/CN208908025U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109583000A (en) * | 2018-09-16 | 2019-04-05 | 苏州芯智瑞微电子有限公司 | Applied to triple-frequency harmonics antenna and its calibration method in wireless power transfer |
| CN110752439A (en) * | 2019-11-15 | 2020-02-04 | Oppo广东移动通信有限公司 | Antenna module and terminal |
| CN110797642A (en) * | 2019-11-15 | 2020-02-14 | Oppo广东移动通信有限公司 | Antenna module and terminal |
| CN110829023A (en) * | 2019-11-15 | 2020-02-21 | Oppo广东移动通信有限公司 | Antenna module and terminal |
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