CN106452116A - Radiofrequency rectifying circuit of double-frequency double-branch structure - Google Patents
Radiofrequency rectifying circuit of double-frequency double-branch structure Download PDFInfo
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- CN106452116A CN106452116A CN201610998199.0A CN201610998199A CN106452116A CN 106452116 A CN106452116 A CN 106452116A CN 201610998199 A CN201610998199 A CN 201610998199A CN 106452116 A CN106452116 A CN 106452116A
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Classifications
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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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- H02J5/005—
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Abstract
The invention relates to a radiofrequency rectifying circuit of a double-frequency double-branch structure. The radiofrequency rectifying circuit comprises an input joint, a high-band branch and a low-band branch, wherein the high-band branch comprises a high-frequency impedance matching network, a high-frequency double-voltage rectifying branch and a high-frequency harmonic suppression branch; an input end of the high-frequency impedance matching network is connected with the input joint; an output end of the high-frequency impedance matching network is connected with an input end of the high-frequency double-voltage rectifying branch; an output end of the high-frequency double-voltage rectifying branch is connected with an input end of the high-frequency harmonic suppression branch; the low-band branch comprises a low-frequency impedance matching network, a low-frequency double-voltage rectifying branch and a low-frequency harmonic suppression branch; an input end of the low-frequency impedance matching network is connected with the input joint; an output end of the low-frequency impedance matching network is connected with an input end of the low-frequency double-voltage rectifying branch; and an output end of the low-frequency double-voltage rectifying branch is connected with an input end of the low-frequency harmonic suppression branch.
Description
Technical field
The present invention relates to wireless energy transfer field, more particularly, to a kind of radio frequency rectification of the double branch structures of double frequency
Circuit.
Background technology
Wireless power transmission (WPT) and space solar power system (SSPS) improve microwave power technology application
Requirement, the concept of wireless power transmission (WPT) proposed by tesla first early in earlier 1900s, hereafter wireless power transmission
(WPT) technology has obtained rapidly developing and being widely applied.
In wireless sense network and smart field, radio-frequency (RF) energy acquisition technique becomes the key for solving that energy carrys out source problem；Penetrate
Frequency energy acquisition technology is collected the electromagnetic wave of surrounding and is converted into available electric energy, is used for electronic device.Therefore
Radio-frequency (RF) energy acquisition technique improves the feasibility of electronic equipment and motility.The subject matter of conventional electronic devices is usually electricity
In the life-span in pond, at this on the one hand, radio-frequency (RF) energy acquisition technique can reduce consuming or even avoiding to battery to the energy content of battery
Rely on.As electromagnetic resource is enriched in surrounding, full of radio-frequency (RF) energy, thus the available radio frequency of a large amount of reliability can be therefrom obtained
（Microwave）Energy, with electronic device normal work.But as the power density of electromagnetism in environment is very little, it is therefore desirable to design
One kind can be operated in multiband, efficient radio frequency rectification circuit.
Rectification circuit is used for radio-frequency alternating current signal energy to be converted into DC energy, to realize the mesh of wireless energy collection
's.The structure of rectification circuit is more, typically has single spur track rectification, multiple branch circuit rectification etc., and the topological structure of diode rectification is also relatively
Many, typically there are single tube structure, voltage doubler structure etc..The mode of operation of rectification circuit is more, typically has one-segment rectification and multifrequency
Section rectification.In the application of wireless energy collection, generally require to meet that input power is low, energy conversion efficiency is high, load voltage
High requirement, existing rectification circuit is difficult to while meeting above-mentioned requirements.
Content of the invention
The present invention is the difficult problem for solving above prior art, there is provided a kind of radio frequency rectified current of the double branch structures of double frequency
Road, the rectification circuit is provided with high band branch road and low-frequency range branch road, can realize the receipts to high band, low-frequency range radio-frequency (RF) energy
Collection, therefore, it is possible to reach the effect for improving capacity usage ratio.
For realizing above goal of the invention, the technical scheme of employing is：
A kind of radio frequency rectification circuit of the double branch structures of double frequency, including input adapter, also includes that high band branch road and low-frequency range are propped up
Road；
Wherein the high band branch road includes high-frequency resistance matching network, high frequency voltage doubling rectifier branch road and high-frequency harmonic suppression
Road, the input of wherein high-frequency resistance matching network is connected with input adapter, the outfan of high-frequency resistance matching network and high frequency
The input connection of voltage multiplying rectifier branch road, the outfan of high frequency voltage doubling rectifier branch road is connected with the input of high-frequency harmonic suppression branch road
Connect；
The low-frequency range branch road includes low-frequency impedance matching network, low frequency voltage multiplying rectifier branch road and low-frequency harmonics suppression branch road, its
The input of medium and low frequency impedance matching network is connected with input adapter, the outfan of low-frequency impedance matching network and low frequency times repoussage
The input connection of stream branch road, the outfan of low frequency voltage multiplying rectifier branch road is connected with the input of low-frequency harmonics suppression branch road.
In such scheme, radio frequency rectification circuit is set up with radio frequency source by input adapter and is connected, and high band branch road is to high frequency
The radio-frequency (RF) energy of section carries out rectification, and low-frequency range branch road carries out rectification to the radio-frequency (RF) energy of low-frequency range.Wherein high band branch road and low
High-frequency resistance matching network, low-frequency impedance matching network, high-frequency resistance matching network, low frequency are respectively provided with frequency range branch road
Impedance matching network is used for carrying out impedance matching, by the input impedance of the input impedance of high band branch road and low-frequency range branch road all
100 ohm are assigned to, after two branch circuit parallel connections, input impedance is 50 ohm.And the high frequency voltage-multiplying in high band branch road and low-frequency range branch road
Rectification branch road and low frequency voltage multiplying rectifier branch road adopt times laminated structure, as above-mentioned two branch road is operated in two different frequencies respectively
Section, the DC load of two branch road ends can not realize the effect of the double output voltage of difference, and output voltage is still propped up for single rectification
The output voltage on road, but compared to traditional one-segment differential configuration voltage doubling rectifing circuit, the present invention realizes the equal size of output
While voltage, rectification can be carried out to two frequency ranges.
Preferably, the high-frequency resistance matching network includes short-circuit minor matters and transmission line, wherein one end of short-circuit minor matters with
Input adapter connects, the other end ground connection of short-circuit minor matters；One end of transmission line is connected with input adapter, the other end of transmission line with
The input connection of high frequency voltage doubling rectifier branch road.
Preferably, the transmission line adopts U-shape structure, and the short circuit minor matters adopt linear structure.
Preferably, the low-frequency impedance matching network includes short-circuit minor matters and transmission line, wherein one end of short-circuit minor matters with
Input adapter connects, the other end ground connection of short-circuit minor matters；One end of transmission line is connected with input adapter, the other end of transmission line
It is connected with the input of low frequency voltage multiplying rectifier branch road.
Preferably, the short circuit minor matters adopt S type structure, and the transmission line adopts linear structure.
In such scheme, the impedance matching network of high band branch road and low-frequency range branch road all adopts short-circuit minor matters match party
Formula, due to the operating frequency difference of two matching networks, the width of its short-circuit minor matters and length are variant, so as to realize two branch roads
Respectively rectification is carried out to different frequency range.In order to reduce the size of circuit, the transmission line in impedance matching network employs U-shaped knot
Structure, short-circuit minor matters replace linear type transmission line structure using S type structure.
Preferably, the high frequency voltage doubling rectifier branch road includes electric capacity C1, electric capacity C2, electric capacity C3, diode D1, diode
The anode of D2, diode D3 and diode D4, the wherein outfan of high-frequency resistance matching network by electric capacity C1 and diode D1
Connection, the negative electrode of diode D1 is connected with the input of high-frequency harmonic suppression branch road；The outfan of high-frequency resistance matching network leads to
The anode for electric capacity C2 being crossed with diode D2 is connected, and the negative electrode of diode D2 is connected with the anode of diode D3, the moon of diode D3
Pole is connected with the anode of diode D1；The negative electrode of diode D2 is grounded by electric capacity C3；The anode of diode D2 and diode D4
Negative electrode connection, the plus earth of diode D4.
Preferably, the low frequency voltage multiplying rectifier branch road includes electric capacity C4, electric capacity C5, electric capacity C6, diode D5, diode
D6, diode D7 and diode D8, the outfan of its medium and low frequency high-frequency resistance matching network is by electric capacity C4 with diode D5's
Negative electrode connects, and the anode of diode D5 is connected with the input of low-frequency harmonics suppression circuit；Low frequency high-frequency resistance matching network
Outfan is connected with the negative electrode of diode D6 by electric capacity C5, and the anode of diode D6 is connected with the negative electrode of diode D7, two poles
The anode of pipe D7 is connected with the negative electrode of diode D5；The negative electrode of diode D7 is grounded by electric capacity C6；The anode of diode D8 with
The negative electrode connection of diode D6, the minus earth of diode D8.
In such scheme, high frequency voltage doubling rectifier branch road, low frequency voltage multiplying rectifier branch road are using the rectifying junction of two-stage cascade multiplication of voltage
Structure, can realize four times of output voltages.
Preferably, the high-frequency harmonic suppression branch road includes short circuit capacitance, the first fan-shaped minor matters and the second fan-shaped minor matters, short
One end of road electric capacity is connected with the outfan of high frequency voltage doubling rectifier branch road, the other end ground connection of short circuit capacitance；Described first is fan-shaped
Minor matters and the second fan-shaped minor matters are connected with the outfan of high frequency voltage doubling rectifier branch road.
Preferably, the low-frequency harmonics suppression branch road includes short circuit capacitance, the 3rd fan-shaped minor matters and four fan-shaped minor matters, short
One end of road electric capacity is connected with the outfan of low frequency voltage multiplying rectifier branch road, the other end ground connection of short circuit capacitance；Described 3rd is fan-shaped
Minor matters and four fan-shaped minor matters are connected with the outfan of low frequency voltage multiplying rectifier branch road.
In such scheme, the harmonic suppression circuit of high band branch road and low-frequency range branch road all adopts parallel connection short circuit electric capacity and two
Individual radian is that 120 degree of fan-shaped minor matters carry out harmonics restraint.As two branch roads are operated in different frequency ranges, the base on two branch roads
Frequency can not cancel each other, so that the fundamental frequency to radio-frequency (RF) energy, secondary and triple-frequency harmonics suppress.Above-mentioned parallel connection short circuit electricity
Hold for suppressing fundamental frequency, two fan-shaped minor matters are respectively used to suppress secondary and triple-frequency harmonics.
Preferably, the input adapter is SMA pin and box sub.
Compared with prior art, the invention has the beneficial effects as follows：
1st, different branch roads adopts different matching networks, realizes double frequency matching effect, improves capacity usage ratio；
2nd, the transmission line in impedance matching network is employed U-shape structure, short-circuit minor matters and is replaced using S type structure linear type to transmit
Line structure, reduces circuit size, improves integrated level；
3rd, branch road improves DC load output voltage using the rectifier structure of two-stage cascade multiplication of voltage；
4th, fundamental frequency is suppressed using parallel connection short circuit electric capacity, reduces circuit size.
Description of the drawings
Fig. 1 is the schematic diagram of radio frequency rectification circuit.
Fig. 2 is the structural representation of radio frequency rectification circuit.
Fig. 3 is the equivalent circuit diagram of radio frequency rectification circuit.
Fig. 4 is the S11 parametric plot of radio frequency rectification circuit.
Fig. 5 is the energy conversion efficiency curve chart of radio frequency rectification circuit.
Specific embodiment
Accompanying drawing being for illustration only property explanation, it is impossible to be interpreted as the restriction to this patent；
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Embodiment 1
The principle of the radio frequency rectification circuit of the double branch structures of double frequency is as shown in figure 1, made by the microstrip line that characteristic impedance is 50 ohm
For signal input part, and it is divided into 100 ohm of high band branch road and low-frequency range branch road.Two branch roads all include that short-circuit minor matters are mated
Network, two-stage cascade voltage multiplying rectifier branch road harmonic suppression branch road.As the matching network of two branch roads works in two differences
Frequency range, therefore radio-frequency (RF) energy is after input, and high band energy primarily enters high band branch road, and low-frequency range energy mainly enters
Enter low-frequency range branch road.Need after two-stage cascade voltage multiplying rectifier to carry out harmonics restraint, to filter higher hamonic wave in output voltage
Composition.The two-stage level cascade voltage multiplying rectifier of one branch road produces four times of output voltages, the rectification frequency range difference of two branch roads, direct current
The output voltage of load is still four times of output voltages.
As shown in Figure 2,3, the radio frequency rectification circuit of the double branch structures of double frequency, including input adapter, high band branch road, low frequency
Duan Zhilu and DC load resistance, the high band branch road includes the impedance matching network 1 of high band, two-stage cascade voltage multiplying rectifier
The harmonics restraint branch road 5 of branch road 3 and high band, the low-frequency range branch road includes the impedance matching network 2, two-stage cascade of low-frequency range
The harmonics restraint branch road 6 of voltage multiplying rectifier branch road 4 and low-frequency range.The outfan impedance respectively with high band of wherein input adapter
The input connection of the impedance matching network 2 of distribution network 1 and low-frequency range, the outfan and two of the impedance matching network 1 of high band
The input connection of level cascade voltage multiplying rectifier branch road 3, the outfan of two-stage cascade voltage multiplying rectifier branch road 3 is pressed down with the harmonic wave of high band
The input connection of branch road processed 5；The outfan of the impedance matching network 2 of low-frequency range is defeated with two-stage cascade voltage multiplying rectifier branch road 4
Enter end connection, the outfan of two-stage cascade voltage multiplying rectifier branch road 4 is connected with the input of the harmonics restraint branch road 6 of low-frequency range；High
Bridging DC load electricity between the outfan of the harmonics restraint branch road 6 of frequency range and the outfan of the harmonics restraint branch road 5 of low-frequency range
Resistance 7.
In specific implementation process, as shown in Figure 2,3, the two-stage cascade voltage multiplying rectifier branch road 3 includes electric capacity C1, electricity
Appearance C2, electric capacity C3, diode D1, diode D2, diode D3 and diode D4's, the wherein impedance matching network 1 of high band
Outfan is connected with the anode of diode D1 by electric capacity C1, the negative electrode of diode D1 and the harmonics restraint branch road 5 of high band
Input connects；The outfan of impedance matching network 1 is connected with the anode of diode D2 by electric capacity C2, the negative electrode of diode D2
It is connected with the anode of diode D3, the negative electrode of diode D3 is connected with the anode of diode D1；The negative electrode of diode D2 is by electricity
Hold C3 ground connection；The anode of diode D2 is connected with the negative electrode of diode D4, the plus earth of diode D4.The two-stage cascade times
Repoussage stream branch road 4 includes electric capacity C4, electric capacity C5, electric capacity C6, diode D5, diode D6, diode D7 and diode D8, wherein
The outfan of the impedance matching network 2 of low-frequency range is connected with the negative electrode of diode D5 by electric capacity C4, the anode of diode D5 with
The input connection of the harmonics restraint branch road 6 of low-frequency range；The outfan of the impedance matching network 2 of low-frequency range passes through electric capacity C5 and two
The negative electrode connection of pole pipe D6, the anode of diode D6 is connected with the negative electrode of diode D7, the anode of diode D7 and diode D5
Negative electrode connection；The negative electrode of diode D7 is grounded by electric capacity C6；The anode of diode D8 is connected with the negative electrode of diode D6, and two
The minus earth of pole pipe D8.
In specific implementation process, as shown in Fig. 2 the impedance matching network 1 of the high band includes short-circuit minor matters 11
With transmission line 12, the impedance matching network 2 of low-frequency range includes short-circuit minor matters 21 and transmission line 22；The harmonics restraint of the high band
Circuit 5 includes short circuit capacitance the 51, first fan-shaped minor matters 52 and the second fan-shaped minor matters 53, and the harmonic suppression circuit 6 of low-frequency range includes
The fan-shaped minor matters 62 of short circuit capacitance the 61, the 3rd and four fan-shaped minor matters 63；Wherein short-circuit minor matters 11 adopt linear structure, transmission line
12 adopt U-shape structure, and short-circuit minor matters 21 adopt S type structure, and transmission line 22 adopts linear structure.
In the present embodiment, the operating frequency of two rectification branch roads of above-mentioned radio frequency rectification circuit be respectively 875MHz and
1.83GHz.The S11 parameter and energy conversion efficiency of above-mentioned radio frequency rectification circuit is tested, the result of concrete test is such as
Fig. 4, shown in 5.As shown in Figure 4, the operating frequency of rectification circuit is respectively in 875MHz and 1.83GHz, return loss（S11）All reach
To Local Minimum, namely impedance matching network can realize impedance matching in two operating frequencies, and energy input is realized maximum
Change.As shown in Figure 5, energy conversion efficiency reaches highest in two operating frequencies, realizes the rectification effect of two-band.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need to be exhaustive to all of embodiment.All this
Any modification, equivalent and improvement that is made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
1. the radio frequency rectification circuit of the double branch structure of a kind of double frequency, including input adapter, it is characterised in that：Also include that high band is propped up
Road and low-frequency range branch road；
Wherein the high band branch road includes high-frequency resistance matching network, high frequency voltage doubling rectifier branch road and high-frequency harmonic suppression
Road, the input of wherein high-frequency resistance matching network is connected with input adapter, the outfan of high-frequency resistance matching network and high frequency
The input connection of voltage multiplying rectifier branch road, the outfan of high frequency voltage doubling rectifier branch road is connected with the input of high-frequency harmonic suppression branch road
Connect；
The low-frequency range branch road includes low-frequency impedance matching network, low frequency voltage multiplying rectifier branch road and low-frequency harmonics suppression branch road, its
The input of medium and low frequency impedance matching network is connected with input adapter, the outfan of low-frequency impedance matching network and low frequency times repoussage
The input connection of stream branch road, the outfan of low frequency voltage multiplying rectifier branch road is connected with the input of low-frequency harmonics suppression branch road.
2. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The high-frequency resistance
Matching network includes short-circuit minor matters and transmission line, and one end of wherein short-circuit minor matters is connected with input adapter, short-circuit minor matters another
End ground connection；One end of transmission line is connected with input adapter, and the other end of transmission line is connected with the input of high frequency voltage doubling rectifier branch road
Connect.
3. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 2, it is characterised in that：The transmission line is adopted
With U-shape structure, the short circuit minor matters adopt linear structure.
4. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The low-frequency impedance
Matching network includes short-circuit minor matters and transmission line, and one end of wherein short-circuit minor matters is connected with input adapter, short-circuit minor matters another
One end is grounded；One end of transmission line is connected with input adapter, the input of the other end of transmission line and low frequency voltage multiplying rectifier branch road
Connection.
5. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 4, it is characterised in that：The short circuit minor matters
Using S type structure, the transmission line adopts linear structure.
6. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The high frequency voltage-multiplying
Rectification branch road includes electric capacity C1, electric capacity C2, electric capacity C3, diode D1, diode D2, diode D3 and diode D4, wherein high
The outfan of frequency impedance matching network is connected with the anode of diode D1 by electric capacity C1, the negative electrode of diode D1 and high-frequency harmonic
The input connection of suppression branch road；The outfan of high-frequency resistance matching network is connected with the anode of diode D2 by electric capacity C2,
The negative electrode of diode D2 is connected with the anode of diode D3, and the negative electrode of diode D3 is connected with the anode of diode D1；Diode
The negative electrode of D2 is grounded by electric capacity C3；The anode of diode D2 is connected with the negative electrode of diode D4, the plus earth of diode D4.
7. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The low frequency multiplication of voltage
Rectification branch road includes electric capacity C4, electric capacity C5, electric capacity C6, diode D5, diode D6, diode D7 and diode D8, wherein low
The outfan of frequency high-frequency resistance matching network is connected with the negative electrode of diode D5 by electric capacity C4, the anode of diode D5 and low frequency
The input connection of harmonic suppression circuit；The moon of the outfan of low frequency high-frequency resistance matching network by electric capacity C5 and diode D6
Pole connects, and the anode of diode D6 is connected with the negative electrode of diode D7, and the anode of diode D7 is connected with the negative electrode of diode D5；
The negative electrode of diode D7 is grounded by electric capacity C6；The anode of diode D8 is connected with the negative electrode of diode D6, the moon of diode D8
Pole is grounded.
8. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The high-frequency harmonic
Suppression branch road includes short circuit capacitance, the first fan-shaped minor matters and the second fan-shaped minor matters, one end of short circuit capacitance and high frequency voltage doubling rectifier
The outfan connection of branch road, the other end ground connection of short circuit capacitance；Described first fan-shaped minor matters and the second fan-shaped minor matters and high frequency times
The outfan connection of repoussage stream branch road.
9. the radio frequency rectification circuit of the double branch structure of double frequency according to claim 1, it is characterised in that：The low-frequency harmonics
Suppression branch road includes short circuit capacitance, the 3rd fan-shaped minor matters and four fan-shaped minor matters, one end of short circuit capacitance and low frequency voltage multiplying rectifier
The outfan connection of branch road, the other end ground connection of short circuit capacitance；Described 3rd fan-shaped minor matters and four fan-shaped minor matters and low frequency times
The outfan connection of repoussage stream branch road.
10. the radio frequency rectification circuit of the double branch structures of double frequency according to any one of claim 1 ~ 9, it is characterised in that：Institute
Input adapter is stated for SMA pin and box sub.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610998199.0A CN106452116A (en) | 2016-11-14 | 2016-11-14 | Radiofrequency rectifying circuit of double-frequency double-branch structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610998199.0A CN106452116A (en) | 2016-11-14 | 2016-11-14 | Radiofrequency rectifying circuit of double-frequency double-branch structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108683340A (en) * | 2018-05-03 | 2018-10-19 | 佛山市顺德区中山大学研究院 | A kind of multi-frequency band radio-frequency rectification circuit |
| CN113659853A (en) * | 2021-08-12 | 2021-11-16 | 西北大学 | Single-branch multi-frequency-band radio frequency rectification circuit |
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| CN113659853A (en) * | 2021-08-12 | 2021-11-16 | 西北大学 | Single-branch multi-frequency-band radio frequency rectification circuit |
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Application publication date: 20170222 |
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