CN208353078U - A kind of 2.4G ISM band RF energy Acquisition Circuit - Google Patents
A kind of 2.4G ISM band RF energy Acquisition Circuit Download PDFInfo
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- CN208353078U CN208353078U CN201821010362.9U CN201821010362U CN208353078U CN 208353078 U CN208353078 U CN 208353078U CN 201821010362 U CN201821010362 U CN 201821010362U CN 208353078 U CN208353078 U CN 208353078U
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- 239000003990 capacitor Substances 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a kind of 2.4G ISM band RF energy Acquisition Circuits.It includes 2.4G antenna, passive RF-DC circuit and DC-DC circuit, the passive RF-DC circuit includes impedance matching circuit, voltage doubling rectifing circuit and LC filter circuit, the input terminal of the impedance matching circuit is electrically connected with 2.4G antenna, the output end of the impedance matching circuit is electrically connected with the input terminal of voltage doubling rectifing circuit, the output end of the voltage doubling rectifing circuit is electrically connected with the input terminal of LC filter circuit, and the output end of the LC filter circuit is electrically connected with the input terminal of DC-DC circuit.The utility model RF energy collecting efficiency with higher, has been inherently eliminated the energy consumption because of caused by metal-oxide-semiconductor switch motion.
Description
Technical field
The utility model relates to energy acquisition technical field more particularly to a kind of 2.4G ISM band RF energy acquisition electricity
Road.
Background technique
Nearly 2 years, wireless energy acquisition technique was increasingly taken seriously, because wireless energy acquisition technique is a low-carbon
The self energizing technology of environmental protection.Wireless signal also carries energy while carrying information, the various interference letter in such environment
Number it will also be turned waste into wealth by wireless energy acquisition technique.
Existing passive RF energy acquisition technique is lower for the RF energy collecting efficiency in 2.4GHz ISM band, Bu Nengman
Sufficient user demand.Application No. is 201410596804.2 Chinese patents, disclose a kind of radio frequency energy collector, adopt
With the symmetrical architecture of 6 metal-oxide-semiconductors, although a higher direct voltage output can be obtained, metal-oxide-semiconductor movement consumption energy
Larger, to reduce energy acquisition efficiency, when RF signal is weaker, the energy of collection can not even be made up because of metal-oxide-semiconductor high speed
The energy of movement and consumption.
Summary of the invention
The utility model to solve the above-mentioned problems, provides a kind of 2.4G ISM with higher RF energy collecting efficiency
Frequency range RF energy Acquisition Circuit.
To solve the above-mentioned problems, the utility model is achieved using following technical scheme:
A kind of 2.4G ISM band RF energy Acquisition Circuit of the utility model, including 2.4G antenna, passive RF-DC circuit
And DC-DC circuit, the passive RF-DC circuit include impedance matching circuit, voltage doubling rectifing circuit and LC filter circuit, the resistance
The input terminal of anti-match circuit is electrically connected with 2.4G antenna, the output end of the impedance matching circuit and voltage doubling rectifing circuit it is defeated
Enter end electrical connection, the output end of the voltage doubling rectifing circuit is electrically connected with the input terminal of LC filter circuit, the LC filter circuit
Output end be electrically connected with the input terminal of DC-DC circuit.
In the technical scheme, 2.4G ISM band RF energy is transferred in passive RF-DC circuit by 2.4G antenna, passive
RF energy is converted to direct voltage output to DC-DC circuit by RF-DC circuit, and DC-DC circuit is by the dc voltage boost of input
After export, charge to energy storage devices such as super capacitor or batteries.
In passive RF-DC circuit, voltage doubling rectifing circuit is used to lower ac voltage rectifier going out a higher direct current
Voltage output to LC filter circuit, LC filter circuit be used for after voltage-doubler rectification burr and noise be filtered, drop
Low-output signal high frequency components.Impedance matching circuit can 2.4GHz to 2.4835GHz ISM band to all kinds of WiFi antennas
Realize relatively reasonable general matching.
Preferably, the impedance matching circuit includes inductance L1 and inductance L2, the first end and 2.4G antenna of inductance L1,
The first end of inductance L2 is electrically connected, and the second end ground connection of inductance L2, the second end of inductance L1 is the output end of impedance matching circuit.
Preferably, the voltage doubling rectifing circuit includes microwave Schottky diode D1, microwave Schottky diode D2, it is micro-
The anode of wave Schottky diode D1 is electrically connected with the cathode of the output end of impedance matching circuit, microwave Schottky diode D2,
The plus earth of microwave Schottky diode D2, the cathode of microwave Schottky diode D1 are the output end of voltage doubling rectifing circuit.
Preferably, the LC filter circuit includes inductance L3, capacitor C1, capacitor C2, inductance L3 first end and times repoussage
The output end of current circuit, the electrical connection of capacitor C1 first end, capacitor C1 second end ground connection, inductance L3 second end and DC-DC circuit
Input terminal, the electrical connection of capacitor C2 first end, capacitor C2 second end ground connection.LC filter circuit be three rank π type filter circuits, for pair
Burr and noise after voltage-doubler rectification are filtered, and reduce output signal high frequency components.
Preferably, the DC-DC circuit is LTC3108-1 chip.The minimum input voltage of LTC3108-1 chip is
20mV is able to achieve more efficient collecting efficiency.
The beneficial effects of the utility model are: RF energy collecting efficiency with higher, has been inherently eliminated because of metal-oxide-semiconductor
Energy consumption caused by switch motion.
Detailed description of the invention
Fig. 1 is a kind of circuit theory connection block diagram of the utility model；
Fig. 2 is the circuit diagram of passive RF-DC circuit；
Fig. 3 is ISM band distribution of impedance situation of the RF energy Acquisition Circuit in 2.4GHz to 2.4835GHz.
In figure: 1,2.4G antenna, 2, passive RF-DC circuit, 3, DC-DC circuit, 4, impedance matching circuit, 5, voltage multiplying rectifier
Circuit, 6, LC filter circuit.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of 2.4G ISM band RF energy Acquisition Circuit of the present embodiment, as shown in Figure 1, including 2.4G days
Line 1, passive RF-DC circuit 2 and DC-DC circuit 3, passive RF-DC circuit 2 include impedance matching circuit 4, voltage doubling rectifing circuit 5
Be electrically connected with the input terminal of LC filter circuit 6, impedance matching circuit 4 with 2.4G antenna 1, the output end of impedance matching circuit 4 with
The input terminal of voltage doubling rectifing circuit 5 is electrically connected, and the output end of voltage doubling rectifing circuit 5 is electrically connected with the input terminal of LC filter circuit 6,
The output end of LC filter circuit 6 is electrically connected with the input terminal of DC-DC circuit 3.
Impedance matching circuit 4 include inductance L1 and inductance L2, voltage doubling rectifing circuit 5 include microwave Schottky diode D1,
Microwave Schottky diode D2, LC filter circuit 6 include inductance L3, capacitor C1, capacitor C2, the first end of inductance L1 with 2.4G days
The first end electrical connection of line 1, inductance L2, the second end ground connection of inductance L2, the second end and microwave Schottky diode of inductance L1
The cathode electrical connection of the anode, microwave Schottky diode D2 of D1, the plus earth of microwave Schottky diode D2, microwave Xiao Te
The cathode of based diode D1 is electrically connected with inductance L3 first end, capacitor C1 first end, capacitor C1 second end ground connection, inductance L3 second
End is electrically connected with the input terminal of DC-DC circuit, capacitor C2 first end, capacitor C2 second end ground connection.
2.4G ISM band RF energy is transferred in passive RF-DC circuit by 2.4G antenna, and passive RF-DC circuit is by RF energy
Amount is converted to direct voltage output to DC-DC circuit, and DC-DC circuit will export after the dc voltage boost of input, to super electricity
The perhaps energy storage devices such as battery charge.
In passive RF-DC circuit, voltage doubling rectifing circuit is used to lower ac voltage rectifier going out a higher direct current
For voltage output to LC filter circuit, LC filter circuit is three rank π type filter circuits, for the burr after voltage-doubler rectification and making an uproar
Sound is filtered, and reduces output signal high frequency components.Impedance matching circuit can be in the ISM of 2.4GHz to 2.4835GHz
Frequency range realizes relatively reasonable general matching to all kinds of WiFi antennas.
Passive RF-DC circuit matching standard 2.4G antenna, can be by integrated circuit for the ISM of 2.4GHz to 2.4835GHz
The S11 of frequency band signals is controlled below -10dB.
DC-DC circuit is LTC3108-1 chip.The minimum input voltage of LTC3108-1 chip is 20mV, is able to achieve more high
The collecting efficiency of effect.Data are emulated according to SPICE, this RF energy Acquisition Circuit cooperation LTC3108-1 realizes 82% final energy
Measure collecting efficiency.
The steady state voltage size of LC filtering output is directly related with RF signal strength.According to experimental data, radiofrequency signal
Intensity is in -10dbm and when not meeting DCDC, and steady state voltage is in 170mV or so；And 0dbm and when not meeting DCDC, steady state voltage exists
430mV or so.
As shown in figure 3, ISM band distribution of impedance situation of the RF energy Acquisition Circuit in 2.4GHz to 2.4835GHz can be with
It is considered that perception is presented lower than 2.44GHz nearby as boundary using intermediate frequency 2.44GHz, is higher than 2.44GHz and capacitive is presented.The feelings
Condition just with it is exactly the opposite as the antenna impedance distribution situation of intermediate frequency (IF) Design using 2.44GHz, form the shape of approximate conjugate impedance match
Condition can further increase the efficiency of RF energy acquisition.
Claims (4)
1. a kind of 2.4G ISM band RF energy Acquisition Circuit, which is characterized in that including 2.4G antenna (1), passive RF-DC circuit
(2) and DC-DC circuit (3), the passive RF-DC circuit (2) include impedance matching circuit (4), voltage doubling rectifing circuit (5) and LC
The input terminal of filter circuit (6), the impedance matching circuit (4) is electrically connected with 2.4G antenna (1), the impedance matching circuit
(4) output end is electrically connected with the input terminal of voltage doubling rectifing circuit (5), and the output end and LC of the voltage doubling rectifing circuit (5) are filtered
The input terminal of wave circuit (6) is electrically connected, and the output end of the LC filter circuit (6) and the input terminal of DC-DC circuit (3) are electrically connected
It connects.
2. a kind of 2.4G ISM band RF energy Acquisition Circuit according to claim 1, which is characterized in that the impedance
It include inductance L1 and inductance L2 with circuit (4), the first end of inductance L1 is electrically connected with the first end of 2.4G antenna, inductance L2, electricity
Feel the second end ground connection of L2, the second end of inductance L1 is the output end of impedance matching circuit (4).
3. a kind of 2.4G ISM band RF energy Acquisition Circuit according to claim 1, which is characterized in that described times of repoussage
Current circuit (5) includes microwave Schottky diode D1, microwave Schottky diode D2, the anode of microwave Schottky diode D1 with
The cathode electrical connection of the output end, microwave Schottky diode D2 of impedance matching circuit (4), the sun of microwave Schottky diode D2
Pole ground connection, the cathode of microwave Schottky diode D1 are the output end of voltage doubling rectifing circuit (5).
4. a kind of 2.4G ISM band RF energy Acquisition Circuit according to claim 1, which is characterized in that the LC filtering
Circuit (6) includes inductance L3, capacitor C1, capacitor C2, output end, the capacitor C1 of inductance L3 first end and voltage doubling rectifing circuit (5)
Input terminal, the capacitor C2 first end electricity of first end electrical connection, capacitor C1 second end ground connection, inductance L3 second end and DC-DC circuit
Connection, capacitor C2 second end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821010362.9U CN208353078U (en) | 2018-06-28 | 2018-06-28 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821010362.9U CN208353078U (en) | 2018-06-28 | 2018-06-28 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208353078U true CN208353078U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821010362.9U Withdrawn - After Issue CN208353078U (en) | 2018-06-28 | 2018-06-28 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964232A (en) * | 2018-06-28 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
-
2018
- 2018-06-28 CN CN201821010362.9U patent/CN208353078U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964232A (en) * | 2018-06-28 | 2018-12-07 | 杭州利尔达展芯科技有限公司 | A kind of 2.4G ISM band RF energy Acquisition Circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190108 Effective date of abandoning: 20240424 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190108 Effective date of abandoning: 20240424 |