CN106452117A - Broadband rectifier for radio frequency energy collecting system - Google Patents
Broadband rectifier for radio frequency energy collecting system Download PDFInfo
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- CN106452117A CN106452117A CN201611122624.6A CN201611122624A CN106452117A CN 106452117 A CN106452117 A CN 106452117A CN 201611122624 A CN201611122624 A CN 201611122624A CN 106452117 A CN106452117 A CN 106452117A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/10—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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Abstract
The invention relates to a broadband rectifier for a radio frequency energy collecting system. The broadband rectifier comprises a receiving antenna part, a rectifier part, a DC-DC voltage booster part and an intelligent managing part, wherein the receiving antenna part is used for receiving the radio frequency energy in the environment and completing the conversion between an atmospheric radio wave and a guided wave; the rectifier part is connected with the receiving antenna part and is used for converting a small alternating current signal received by the antenna into a direct current voltage; the DC-DC voltage booster part is connected with the rectifier part and is used for boosting an output voltage of the rectifier part; and the intelligent managing part is connected with the DC-DC voltage booster part and is used for supplying stable output voltage to a battery or a device terminal. The broadband rectifier for the radio frequency energy collecting system, provided by the invention, utilizes a rectifier diode to convert the environmental radio frequency energy received by the receiving antenna into the direct current voltage and can realize the wireless energy supply for low-power consumption electronic products (RFID, mobile phones, Bluetooth headsets, battery-free remote controllers, and the like).
Description
Technical field
The invention belongs to the commutation technique field of wireless energy transfer, it is applied to radio-frequency (RF) energy particularly to one kind and collects system
The wideband commutator of system.
Background technology
In recent years, various low power dissipation electron products (RFID, mobile phone, bluetooth earphone, electric non-battery remote controller etc.) and wireless biography
Sensor equipment has obtained increasingly being widely applied in actual life.These low power dissipation electron products are mainly battery-powered,
But, the volume that wireless device can be increased using one side of battery, another aspect limited battery life, old and useless battery is even more and holds
Easily cause environmental pollution.So needing a kind of new power supply technique badly to provide energy for these products.With wireless communication technology
Fast development, the popularization of the radio frequency power source such as increasing cellular mobile base stations, DTV tower and Wi-Fi router, ring
Radio frequency power density in border constantly increases.Therefore, become for low-power electronic devices energy supply using the radio-frequency (RF) energy in environment
The focus of research both at home and abroad in recent years.And using RECTIFYING ANTENNA technology, the radio-frequency (RF) energy in environment is converted to DC voltage and enters
It is a kind of feasible solution that row wireless energy is collected.RECTIFYING ANTENNA is as the composition of most critical in radio-frequency (RF) energy collection system
Part, is mainly made up of reception antenna and commutator, and wherein the radio-frequency (RF) energy in environment mainly collected by reception antenna, and commutator will
The radio-frequency (RF) energy that antenna receives is converted to available dc power.At present, the radio frequency power density in environment compare relatively low,
Researcher common concern is in the research of broad-band reception antenna and single-frequency commutator and design, and it is whole to ignore corresponding wideband
The research of stream device.In actual applications, the radio-frequency (RF) energy rectification that wideband commutator can simultaneously to multiple frequency ranges, is improved whole with this
The power sensitivity of current antenna, collects more radio-frequency (RF) energy, thus solve single-frequency commutator supplying because rectification frequency range is single
The not enough difficult problem of energy.Therefore, research wideband commutator for radio-frequency (RF) energy collection system overall performance lifting have extremely heavy
The meaning wanted.
Content of the invention
In view of this, it is an object of the invention to provide a kind of wideband commutator being applied to radio-frequency (RF) energy collection system.
The purpose of the present invention is achieved through the following technical solutions, a kind of width being applied to radio-frequency (RF) energy collection system
Frequency commutator, including reception antenna part, rectifier part, DC-DC booster part and intelligent management part；Described reception sky
Line part is used for receiving the radio-frequency (RF) energy in environment, and completes the conversion between atmospheric radio waves and guided wave；Described whole
Stream device part is connected with reception antenna part, and the ac small signal that antenna is received is converted into DC voltage；Described DC-DC liter
Depressor part is connected with rectifier part, for rectifier part output voltage is boosted；Described Intelligent management module portion
Point it is connected with DC-DC booster part, be battery or the stable output voltage of device end offer.
Further, described rectifier part includes voltage voltage doubling rectifing circuit I being connected in parallel and voltage voltage multiplying rectifier electricity
Road II, described voltage voltage doubling rectifing circuit I includes impedance matching circuit part I, rectification unit part I and capacitor part I, institute
State voltage voltage doubling rectifing circuit II and include impedance matching circuit part II, rectification unit part II and capacitor part II, described
Rectification unit part I includes diode D1 and diode D2, and described capacitor part I includes electric capacity C1 and electric capacity C2, described resistance
The input of anti-match circuit part I is connected with reception antenna, and the outfan of described impedance matching circuit part I is with electric capacity C2's
One end connects, and the other end of electric capacity C2 is connected with the positive pole of diode D1, the negative pole of diode D2 respectively, the positive pole of diode D2
It is connected with one end of electric capacity C1, the other end of electric capacity C1 is connected with the negative pole of diode D1, diode D1 is through loading RLGround connection；Institute
State rectification unit part II and include diode D3 and diode D4, described capacitor part II includes electric capacity C3 and electric capacity C4, institute
The input stating impedance matching circuit part II is connected with reception antenna, the outfan of described impedance matching circuit part II with electricity
The one end holding C4 connects, and the other end of electric capacity C4 is connected with the positive pole of diode D3, the negative pole of diode D4 respectively, diode D4
Positive pole be connected with one end of electric capacity C3, the other end of electric capacity C3 respectively with the negative pole of diode D3, diode D2 positive pole even
Connect, the plus earth of diode D4.
Further, described impedance matching circuit part I includes sector open-circuit minor matters I, the short-circuit minor matters of bending and chip inductor
I；Described sector open-circuit minor matters I include scallop I and connecting portion I, and scallop I is located at connecting portion I respectively with the short-circuit minor matters of bending
Both sides；Two radiuses of described scallop I and connecting portion I have same angle, and the center of circle of described scallop I is arranged at even
One end of socket part I, the short-circuit minor matters of bending are connected to the other end of connecting portion I；Described chip inductor I is connected to the end of connecting portion I
Portion.
Further, described impedance matching circuit part II includes sector open-circuit minor matters II, directly short-circuit minor matters and chip inductor
II, described sector open-circuit minor matters II include scallop II and connecting portion II, and scallop II is located at respectively with directly short-circuit minor matters and is connected
The both sides of portion II；Two radiuses of described scallop II and connecting portion II have same angle, the center of circle of described scallop II
It is arranged at one end of connecting portion II, directly short-circuit minor matters are connected to the other end of connecting portion II；Described chip inductor II is connected to
The end of socket part II.
Because using above technical scheme, the present invention has advantages below：
Compared with existing single-frequency commutator, the present invention be applied to radio-frequency (RF) energy collection system wideband commutator have following
Advantage：
1. there is broader bandwidth of operation.Its working frequency range can cover GSM1800/4G (1850-1900MHz), UMTS/3G
(2150-2200MHz) with WiFi (2400-2450MHz)；2. there is higher power sensitivity；3. there is higher RF-DC turn
Change efficiency.
Brief description
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein：
Fig. 1 is radio-frequency (RF) energy collection system structure chart involved in the present invention；
Fig. 2 is the rectification circuit schematic diagram designed by the present invention；
Fig. 3 is the match circuit schematic diagram designed by the present invention, and wherein a is the schematic diagram of match circuit I, and b is coupling electricity
The schematic diagram of road II；
Fig. 4 is the rectification circuit ADS emulation domain structure figure designed by the present invention；
Fig. 5 is to emulate the curve chart that the reflection coefficient (S11) of this commutator obtaining changes with frequency.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in figure 1, radio-frequency (RF) energy collection system involved in the present invention include reception antenna part, rectifier part,
DC-DC booster part, intelligent management part and battery or device end part,
Described reception antenna part receives the radio-frequency (RF) energy in environment to greatest extent, and complete atmospheric radio waves and
Conversion between guided wave.
The ac small signal that antenna receives is converted into DC voltage by described rectifier part；It is energy collecting system
Important component part, its loss and conversion efficiency will determine whole system whole efficiency.
Described DC-DC booster part is typically used to provide one and adjusts voltage or improve voltage.
Described Intelligent management module part is mainly battery or device end provides a stable output voltage.
As shown in Fig. 2 the rectifier part designed by the present invention includes voltage voltage doubling rectifing circuit I being connected in parallel and electricity
Pressure voltage doubling rectifing circuit II, described voltage voltage doubling rectifing circuit I includes impedance matching circuit part I, rectification unit part I and electricity
Container part I, described voltage voltage doubling rectifing circuit II includes impedance matching circuit part II, rectification unit part II and capacitor
Part II, described rectification unit part I includes diode D1 and diode D2, and described capacitor part I includes electric capacity C1 and electricity
Hold C2, the input of described impedance matching circuit part I is connected with reception antenna, the output of described impedance matching circuit part I
End is connected with one end of electric capacity C2, and the other end of electric capacity C2 is connected with the positive pole of diode D1, the negative pole of diode D2 respectively, and two
The positive pole of pole pipe D2 is connected with one end of electric capacity C1, and the other end of electric capacity C1 is connected with the negative pole of diode D1, diode D1 warp
Load RLGround connection；Described rectification unit part II includes diode D3 and diode D4, and described capacitor part II includes electric capacity
C3 and electric capacity C4, the input of described impedance matching circuit part II is connected with reception antenna, described impedance matching circuit part
The outfan of II is connected with one end of electric capacity C4, the other end of electric capacity C4 respectively with the positive pole of diode D3, diode D4 negative
Pole connects, and the positive pole of diode D4 is connected with one end of electric capacity C3, the other end of electric capacity C3 respectively with the negative pole of diode D3, two
The positive pole of pole pipe D2 connects, the plus earth of diode D4.
Rectification unit part I and rectification unit part II are respectively by commutation diode D1 and D2 series connection, D3 and D4 series connection
Become, realize radio-frequency power to the conversion of DC voltage.In the present embodiment, the radiofrequency signal that antenna receives is usually sine
Signal, the positive half cycle of input signal is rectified diode D1 rectification, and energy stores exist taking the rectification unit of D1 and D2 composition as a example
In C1.The negative half period of input signal is rectified diode D2 rectification, and energy stores are in electric capacity C2.Energy in electric capacity C2 can
Transfer in electric capacity C1, in the same manner, the energy in electric capacity C4 can be transferred in electric capacity C3, and therefore, the DC voltage of output is obvious
Double.
Capacitor part I and capacitor part II are made up of C1 and C2, tetra- electric capacity of C3 and C4 respectively, have energy storage effect
While rectification circuit can also be made smoothly to export direct current wave beam.Wherein C2 and C4 has the effect of low pass filter, permissible
The secondary or higher hamonic wave that suppression commutation diode produces is radiated in free space by antenna again；C1 and C3 has straight-through
The effect of wave filter, that realizes DC energy filter with low insertion loss is transferred to load, for fundamental frequency and by rectification circuit produce secondary
And above harmonic wave then plays inhibition so that the comparison that becomes of the voltage after diode rectification is steady.
Fig. 3 is the impedance matching circuit designed by the present invention, and wherein figure (a) and figure (b) correspond to the impedance in Fig. 2 respectively
Join circuit I and impedance matching circuit II, all mated using π type mating structure.Match circuit in figure (a) includes sector and opens
Road minor matters I, the short-circuit minor matters 2 of bending and chip inductor I, to realize in 1.85GHz and 2.45GHz frequency range load impedance and source impedance
Between impedance matching.Match circuit in figure (b) includes sector open-circuit minor matters II, directly short-circuit minor matters 5 and chip inductor II, with
Realize the impedance matching between 2.15GHz frequency range load impedance and source impedance.
Described sector open-circuit minor matters I include scallop I1 and connecting portion I3, and short-circuit minor matters are located at scallop I respectively with bending
The both sides of connecting portion I；Two radiuses of described scallop I and connecting portion I have same angle, the center of circle of described scallop I
It is arranged at one end of connecting portion I, the short-circuit minor matters of bending are connected to the other end of connecting portion I；Described chip inductor I is connected to connection
The end of portion I.
Described sector open-circuit minor matters II include scallop II4 and connecting portion II6, scallop II and directly short-circuit minor matters position respectively
Both sides in connecting portion II；Two radiuses of described scallop II and connecting portion II have same angle, described scallop II
The center of circle be arranged at one end of connecting portion II, directly short-circuit minor matters are connected to the other end of connecting portion II；Described chip inductor II is even
It is connected to the end of connecting portion II.
Wherein, sector open-circuit minor matters are equivalent to 1/4 wavelength open line, act primarily as capacitive reactance effect in match circuit.With biography
System straight stub is compared, and narrow-band characteristic can be improved as broadband using sector open-circuit minor matters under conditions of input impedance is identical
Characteristic, therefore, it is possible to realize wider bandwidth of operation.Short-circuit minor matters are equivalent to inductance or electric capacity, when short-circuit minor matters length is less than 1/
During 4 wavelength, show as perception；When short-circuit minor matters length is more than 1/4 wavelength, show as capacitive.Chip inductor L1With paster electricity
Sense L2Major function is to determine the working frequency range of rectification circuit.In the present embodiment, short-circuit minor matters are in perception, with inductance, fan
Shape open circuit minor matters collectively constitute matching network.Work as R1During increase, the resonant frequency of 1.85GHz and 2.45GHz frequency range is inclined to low frequency
Move；R2During increase, the resonant frequency of 2.15GHz frequency range is to low frequency offset.During increase, the bandwidth of operation of rectification circuit becomes
Narrow.Work as l1、l2During increase, resonant frequency is all to low frequency offset.Adjust L1、L2Inductance value size, rectification circuit resonance frequency
Rate can occur different degrees of skew to low-frequency range or high band.
As shown in figure 4, the rectifier structure designed by the present invention, the live width of impedance matching circuit is 2mm, its middle impedance
The radius R of the sector open-circuit minor matters of match circuit I1For 6.5mm, radianFor 100 °；Arc length l of the short-circuit minor matters of bending1For
9.8mm.The radius R of the sector open-circuit minor matters of impedance matching circuit II2For 3.0mm, radianFor 90 °；The directly length of short-circuit minor matters
Degree l2For 3.5mm.Chip inductor L1、L2Inductance value be respectively 4.7nH, 2.7nH, packing forms be 0805.
Model HSMS_285C of the Schottky barrier diodes of described rectification unit part, its packing forms is SOT-
323.
Four patch capacitor C of described capacitor part1、C2、C3、C4Capacitance be 100pF, its packing forms is
0805.
In the present invention, impedance matching circuit part, rectification unit part, capacitor part and load are arranged at metal
On earth plate.
The material of the medium substrate of metal ground plate is Rogers_RT_Duroid5880, and its relative dielectric constant is 2.2,
Dielectric loss is 0.0009, and its length L is 50mm, and width W is 40mm, and thickness is 0.787mm.Described metal ground plate is located at and is situated between
The bottom of matter substrate, its size is as medium substrate.
Described load RLFor Chip-R, its resistance is 700 Ω, and its packing forms is 0805.
Carry out emulation experiment using ADS simulation software.It is special that simulation study shows that this commutator has good wideband rectification
Property, can apply in radio-frequency (RF) energy collection system.By software optimization work(getable parameters optimum size such as table 1 institute
Show.
The each parameters optimal size table of table 1
According to above parameter, with ADS, simulation calculation is carried out to the antenna of the present invention, obtain the reflection coefficient of rectification circuit
(S11) as shown in Figure 5 with the curve of frequency change.
Fig. 5 is the reflection coefficient (S of this rectification circuit that emulation obtains11) with frequency change curve chart.Permissible from figure
Find out, in S11During≤- 10dB, this rectification circuit is operated in 3 frequency ranges, respectively 1750-1920MHz, 2110-2200MHz and
2400-2520MHz, covers GSM1800/4G (1850-1900MHz), UMTS/3G (2150-2200MHz) and WiFi (2400-
2450MHz) frequency range.
Finally illustrate, preferred embodiment above only in order to technical scheme to be described and unrestricted, although logical
Cross above preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be
In form and various changes are made to it, without departing from claims of the present invention limited range in details.
Claims (4)
1. a kind of wideband commutator being applied to radio-frequency (RF) energy collection system it is characterised in that：Including reception antenna part, rectification
Device part, DC-DC booster part and intelligent management part；
Described reception antenna part is used for receiving the radio-frequency (RF) energy in environment, and completes between atmospheric radio waves and guided wave
Conversion；
Described rectifier part is connected with reception antenna part, and the ac small signal that antenna is received is converted into DC voltage；
Described DC-DC booster part is connected with rectifier part, for rectifier part output voltage is boosted；
Described Intelligent management module part is connected with DC-DC booster part, is that battery or device end provide stable output
Voltage.
2. a kind of wideband commutator being applied to radio-frequency (RF) energy collection system according to claim 1 it is characterised in that：Institute
State voltage voltage doubling rectifing circuit I and voltage voltage doubling rectifing circuit II that rectifier part includes being connected in parallel, described voltage multiplication of voltage
Rectification circuit I includes impedance matching circuit part I, rectification unit part I and capacitor part I, described voltage voltage multiplying rectifier electricity
Road II includes impedance matching circuit part II, rectification unit part II and capacitor part II,
Described rectification unit part I includes diode D1 and diode D2, and described capacitor part I includes electric capacity C1 and electric capacity
C2, the input of described impedance matching circuit part I is connected with reception antenna, the outfan of described impedance matching circuit part I
It is connected with one end of electric capacity C2, the other end of electric capacity C2 is connected with the positive pole of diode D1, the negative pole of diode D2 respectively, two poles
The positive pole of pipe D2 is connected with one end of electric capacity C1, and the other end of electric capacity C1 is connected with the negative pole of diode D1, and diode D1 is through negative
Carry RLGround connection；
Described rectification unit part II includes diode D3 and diode D4, and described capacitor part II includes electric capacity C3 and electric capacity
C4, the input of described impedance matching circuit part II is connected with reception antenna, the output of described impedance matching circuit part II
End is connected with one end of electric capacity C4, and the other end of electric capacity C4 is connected with the positive pole of diode D3, the negative pole of diode D4 respectively, and two
The positive pole of pole pipe D4 is connected with one end of electric capacity C3, the other end of electric capacity C3 respectively with the negative pole of diode D3, diode D2
Positive pole connects, the plus earth of diode D4.
3. a kind of wideband commutator being applied to radio-frequency (RF) energy collection system according to claim 2 it is characterised in that：Institute
State impedance matching circuit part I and include sector open-circuit minor matters I, the short-circuit minor matters of bending and chip inductor I；Described sector open-circuit minor matters
I includes scallop I and connecting portion I, and scallop I is located at the both sides of connecting portion I respectively with the short-circuit minor matters of bending；Described scallop I
Two radiuses and connecting portion I there is same angle, the center of circle of described scallop I is arranged at one end of connecting portion I, and bending is short
Road minor matters are connected to the other end of connecting portion I；Described chip inductor I is connected to the end of connecting portion I.
4. a kind of wideband commutator being applied to radio-frequency (RF) energy collection system according to Claims 2 or 3, its feature exists
In：Described impedance matching circuit part II includes sector open-circuit minor matters II, directly short-circuit minor matters and chip inductor II, and described sector is opened
Road minor matters II include scallop II and connecting portion II, and scallop II is located at the both sides of connecting portion II respectively with directly short-circuit minor matters；Institute
State two radiuses of scallop II and connecting portion II has same angle, the center of circle of described scallop II is arranged at connecting portion II
One end, directly short-circuit minor matters be connected to the other end of connecting portion II；Described chip inductor II is connected to the end of connecting portion II.
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| CN108306425A (en) * | 2018-03-08 | 2018-07-20 | 中国科学院微电子研究所 | Reconfigurable CMOS radio frequency energy acquisition system |
| CN108832729A (en) * | 2018-07-13 | 2018-11-16 | 广东工业大学 | A kind of unmanned plane and RF energy collection method |
| CN110401268A (en) * | 2019-07-29 | 2019-11-01 | 哈尔滨工业大学 | A kind of RF energy collection method and system based on electromagnetic space Situation Awareness |
| CN110401268B (en) * | 2019-07-29 | 2023-02-03 | 哈尔滨工业大学 | Radio frequency energy collection method and system based on electromagnetic space situation perception |
| CN110676951A (en) * | 2019-09-05 | 2020-01-10 | 宁波大学 | Self-powered system based on environment radio frequency energy collection |
| CN110676951B (en) * | 2019-09-05 | 2023-03-03 | 宁波大学 | Self-powered system based on environment radio frequency energy collection |
| CN110935098A (en) * | 2019-11-29 | 2020-03-31 | 常州瑞神安医疗器械有限公司 | Miniaturized radio frequency energy collecting circuit and implantable medical equipment power supply circuit |
| CN110935098B (en) * | 2019-11-29 | 2023-07-18 | 常州瑞神安医疗器械有限公司 | Miniaturized radio frequency energy collection circuit and implantable medical device power supply circuit |
| CN111950305A (en) * | 2020-08-06 | 2020-11-17 | 普玄物联科技(杭州)有限公司 | Self-charging Bluetooth electronic tag system |
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