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CN-224218392-U - Rectifying circuit and electronic device

CN224218392UCN 224218392 UCN224218392 UCN 224218392UCN-224218392-U

Abstract

The application discloses a rectifying circuit and electronic equipment, and belongs to the technical field of wireless energy transmission. The rectification circuit comprises a broadband matching network, a coupling network, a rectification network and a direct current filter network, wherein the broadband matching network is connected with a signal source and used for carrying out impedance matching with the signal source and receiving radio frequency signals provided by the signal source, the coupling network is connected with the broadband matching network and the rectification network and used for improving the voltage of the radio frequency signals output by the broadband matching network and outputting the radio frequency signals with the increased voltage to the rectification network, the rectification network comprises a Schottky diode and is connected with the direct current filter network and used for converting the received radio frequency signals into direct current electric signals through the Schottky diode and outputting the direct current electric signals to the direct current filter network, and the direct current filter network is used for carrying out filter processing on the signals output by the rectification network and obtaining and outputting the direct current electric signals.

Inventors

  • XU CHEN

Assignees

  • 维沃移动通信有限公司

Dates

Publication Date
20260508
Application Date
20250422

Claims (15)

  1. 1. The rectification circuit is characterized by comprising a broadband matching network, a coupling network, a rectification network and a direct current filter network; the broadband matching network is connected with the signal source, and is used for carrying out impedance matching with the signal source and receiving radio frequency signals provided by the signal source; The coupling network is connected with the broadband matching network and the rectifying network and is used for improving the voltage of the radio frequency signal output by the broadband matching network and outputting the radio frequency signal with the improved voltage to the rectifying network; the rectification network comprises a Schottky diode, is connected with the direct current filtering network and is used for converting the received radio frequency signal into a direct current electric signal through the Schottky diode and outputting the direct current electric signal to the direct current filtering network; the direct current filter network is used for carrying out filter processing on the signal output by the rectification network to obtain and output the direct current signal.
  2. 2. The rectifier circuit according to claim 1, wherein the coupling network comprises a coupling branch; The coupling branch is connected with the broadband matching network and the rectifying network and is used for improving the voltage of the radio frequency signal output by the broadband matching network.
  3. 3. The rectifier circuit according to claim 2, wherein the number of the coupling branches in the coupling network is at least two, and the at least two coupling branches are connected in series by a microstrip line.
  4. 4. The rectifier circuit of claim 1, wherein the broadband matching network comprises a first microstrip line, a blocking capacitor, an impedance matching stub, and a second microstrip line; The first microstrip line is connected with the blocking capacitor and is used for receiving the radio frequency signal provided by the signal source and outputting the radio frequency signal to the blocking capacitor; The blocking capacitor is connected with the impedance matching branch and is used for blocking the signal output by the first microstrip line to obtain and output the radio frequency signal subjected to the blocking treatment to the impedance matching branch; The impedance matching branch is connected with the second microstrip line and is used for adjusting the input impedance of the rectifying circuit so as to perform impedance matching with the signal source and outputting the radio frequency signal transmitted by the blocking capacitor to the second microstrip line; The second microstrip line is connected with the coupling network, and is used for adjusting the output impedance of the broadband matching network, so as to perform impedance matching with a circuit connected with the second microstrip line in the rectifying circuit, and outputting the radio frequency signal transmitted by the impedance matching branch to the coupling network.
  5. 5. The rectifier circuit of claim 4, wherein said impedance matching branches include a third microstrip line and a fourth microstrip line; The third microstrip line and the fourth microstrip line are connected in an L shape, and a common end of the third microstrip line and the fourth microstrip line is connected with the second microstrip line.
  6. 6. The rectifier circuit according to claim 5, wherein the number of the second microstrip lines is at least two, and at least two of the second microstrip lines are connected in series.
  7. 7. The rectifier circuit according to any one of claims 4 to 6, wherein the broadband matching network further comprises a first lumped inductance; The first lumped inductor is respectively connected with the impedance matching branch and the second microstrip line and is used for carrying out capacitance compensation on the Schottky diode in the rectifying network.
  8. 8. The rectifier circuit of claim 1, wherein the DC filter network comprises a fifth microstrip, a sixth microstrip, and at least one pair of sector microstrip, each pair of sector microstrip comprising a first sector microstrip and a second sector microstrip; the vertex of the first fan-shaped microstrip line coincides with the vertex of the second fan-shaped microstrip line, and is connected with the rectification network through the fifth microstrip line, and the sixth microstrip line is respectively connected with the vertex of the first fan-shaped microstrip line and the vertex of the second fan-shaped microstrip line, and is used as an output end of the direct current filter network for outputting the direct current signal.
  9. 9. The rectifier circuit of claim 8, wherein said first sector microstrip line is an open stub having a length of 1/4 wavelength and said second sector microstrip line is an open stub having a length of 1/8 wavelength, said wavelength being a wavelength of a radio frequency signal received by said rectifier circuit.
  10. 10. The rectifier circuit according to claim 1, wherein the DC filter network comprises at least one lumped capacitor; One end of the lumped capacitor is connected with the rectifying network, the other end of the lumped capacitor is grounded, and at least two lumped capacitors are connected in parallel under the condition that the direct current filtering network comprises at least two lumped capacitors.
  11. 11. The rectifier circuit according to claim 10, wherein the DC filter network further comprises a lumped inductance; The lumped inductor is respectively connected with one end of the rectifying network and one end of the lumped capacitor.
  12. 12. The rectifier circuit according to claim 1, wherein the rectifier network further comprises a seventh microstrip line and an eighth microstrip line; The seventh microstrip line is connected with the coupling network, the direct current filter network and the Schottky diode, the Schottky diode is grounded through the eighth microstrip line, and the Schottky diode is used for converting the radio frequency signal output by the coupling network into a direct current signal through the seventh microstrip line.
  13. 13. The rectifying circuit of claim 12, wherein said rectifying network comprises two schottky diodes, said two schottky diodes comprising a first schottky diode and a second schottky diode; One end of the first Schottky diode is connected with the seventh microstrip line, the other end of the first Schottky diode is connected with the direct current filter network, one end of the second Schottky diode is connected with the seventh microstrip line, and the other end of the second Schottky diode is grounded through the eighth microstrip line.
  14. 14. The rectifier circuit according to claim 12, wherein said rectifier network includes a third schottky diode, said eighth microstrip line being a third coupling branch; One end of the third Schottky diode is connected with the coupling network and the direct current filter network through the seventh microstrip line respectively, and the other end of the third Schottky diode is grounded through the third coupling branch.
  15. 15. An electronic device comprising the rectifier circuit according to any one of claims 1 to 14.

Description

Rectifying circuit and electronic device Technical Field The application belongs to the technical field of wireless energy transmission, and particularly relates to a rectifying circuit and electronic equipment. Background Wireless energy transfer (Wireless Power Transfer, WPT) technology is a technology that uses physical space energy carriers such as electromagnetic fields, microwaves, lasers, etc. to effect the transfer of energy from an energy source to an electrical load. Because wireless transmission of energy can be realized under the WPT technology, the problem caused by the traditional wired transmission mode by means of an electric conductor is solved, and therefore, the WPT technology is widely studied. The rectifier circuit is used as an important component of the receiving end of the wireless energy transmission system and can convert received microwave energy into direct current energy. Thus, the performance of the rectifying circuit, such as bandwidth, energy conversion efficiency, etc., may have a large impact on the wireless energy transfer system. However, current rectifying circuits generally suffer from lower energy conversion rates for lower power microwave energy. Disclosure of utility model The embodiment of the application aims to provide a rectifying circuit and electronic equipment, which at least solve the problem that the existing rectifying circuit generally has low energy conversion rate to low-power microwave energy. In a first aspect, an embodiment of the present application provides a rectifying circuit, where the rectifying circuit includes a broadband matching network, a coupling network, a rectifying network, and a dc filtering network; the broadband matching network is connected with the signal source, and is used for carrying out impedance matching with the signal source and receiving radio frequency signals provided by the signal source; The coupling network is connected with the broadband matching network and the rectifying network and is used for improving the voltage of the radio frequency signal output by the broadband matching network and outputting the radio frequency signal with the improved voltage to the rectifying network; the rectification network comprises a Schottky diode, is connected with the direct current filtering network and is used for converting the received radio frequency signal into a direct current electric signal through the Schottky diode and outputting the direct current electric signal to the direct current filtering network; the direct current filter network is used for carrying out filter processing on the signal output by the rectification network to obtain and output the direct current signal. In a second aspect, an embodiment of the present application provides an electronic device, including the rectifying circuit according to any one of the first aspects. In an embodiment of the application, the rectification circuit comprises a broadband matching network, a coupling network, a rectification network and a direct current filter network. The broadband matching network is used for receiving the radio frequency signals provided by the signal source, and the coupling network is used for improving the voltage of the radio frequency signals output by the broadband matching network. The rectification network is used for converting the received radio frequency signal into a direct current signal through the Schottky diode. The direct current filter network is used for carrying out filter processing on the signals output by the rectification network to obtain and output direct current signals. In the technical scheme, the coupling network can improve the voltage of the radio frequency signal transmitted by the broadband matching network. The radio frequency signal with higher voltage can not only enable the Schottky diode in the excitation rectifying network to enter a conducting state more easily, but also enable the Schottky diode to capture more radio frequency energy during conducting rectification, so that the direct-current voltage converted by the Schottky diode can be effectively improved, the rectifying efficiency of the rectifying network is improved, and the integral rectifying efficiency of the rectifying circuit is further improved. In particular, in the low power rf signal scenario, the voltage of the rf signal is also relatively low due to the low power, and the schottky diode also has an upper voltage limit for the rf signal that can be received. Therefore, the coupling network has larger lifting space for the voltage of the low-power radio frequency signal, so that the radio frequency signal with relatively higher voltage can be transmitted to the rectification network, the direct-current voltage converted by the Schottky diode can be more effectively lifted, and the energy conversion efficiency of the rectification circuit for the low-power radio frequency signal is improved. Drawings Fig. 1 to 9 are schematic diagrams of a r