CN104993618A

CN104993618A - Circuit for converting electromagnetic wave into DC voltage

Info

Publication number: CN104993618A
Application number: CN201510417547.6A
Authority: CN
Inventors: 胡芳仁; 刘畅安
Original assignee: Nanjing Post and Telecommunication University
Current assignee: Nanjing Post and Telecommunication University; Nanjing University of Posts and Telecommunications
Priority date: 2015-07-15
Filing date: 2015-07-15
Publication date: 2015-10-21

Abstract

The invention discloses a circuit for converting electromagnetic waves of specific spatial frequency bands into a DC voltage. The adopted scheme is that: the circuit comprises three groups of loop antennas, three band-pass filters, three coplanar lines, three diodes and three DC band-pass filters, wherein the three groups of loop antennas are used for receiving electromagnetic wave signals of spatial 910MHz, 915MHz and 925MHz frequency bands; the three coplanar lines are used for connecting the loop antennas and impedance matching devices; the band-pass filters each operate at a center frequency and has a large attenuation system except for the center frequency; the diodes convert RF signals into DC signals; and the DC band-pass filters are used for further filtering out clutters of the DC signals. The circuit can effectively converting spatial electromagnetic waves into the DC voltage for driving a post-stage load without increasing circuit design difficulty.

Description

A kind of electromagnetic wave is converted to the circuit of direct voltage

Technical field

The present invention relates to a kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage, belong to charging modes in industrial technology, charging device technical field.

Background technology

The electromagnetic wave that people are usually said, mainly refers to radio wave, but except radio wave, also has visible ray, ultraviolet, infrared ray, X ray etc.Electromagnetic wave is widely used in the communication systems such as radio broadcasting, radio communication, satellite communication, radionavigation, radar, television broadcasting, and grid.High-frequency quenching, welding, melting, plastic heat sealing, microwave heating, the fields such as the industrial production such as micro-wave therapeutic, health care and scientific research.Usually have stronger electromagnetic wave in densely populated residential block, and these electromagnetic waves are often from large power, electrically magnetic wave transmitter, as broadcasting station, TV station etc.But these electromagnetic waves often can not fully be used, be cause serious Contamination of Electromagnetic Wave on the contrary.Not only affect the healthy of resident, but also the normal operation of interference electronic equipment.On the other hand, the direct voltage needed for existing direct-flow electricity utilization apparatus is converted from civil power or industrial alternating current by conversion equipment often, is seldom obtained by solar energy, spatial electromagnetic ripple or other approach.

Summary of the invention

The object of the invention is: propose a kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage, be made up of three groups of loop aerials, three band pass filters, three complanar lines, three diodes, direct current band pass filter and adders, the electromagnetic wave of space different frequency range can be converted to d. c. voltage signal.

For reaching above-mentioned purpose, the technical solution adopted in the present invention is as follows:

Include three loop aerials 101,108,112, three band pass filters 104,109,113, three complanar lines, 102, three diodes 105,110,114, three direct current band pass filters, 106,111,115 and adder forms 107.

Described loop aerial 101,108,112 is symmetrically placed in complanar line 102 both sides, and n forms one group, and n symmetrical antenna in each group has identical operating frequency, obtains the electromagnetic energy of similar frequency bands to improve from space.First group 101, second group 108 and the 3rd group of 112 center operating frequency are respectively 910MHz, 915MHz and 925MHz., object is to obtain the electromagnetic energy of space different frequency range, to increase the summation of received energy, and further raising system conversion efficiency.

Described impedance matching is for solving input impedance and band pass filter 104,109, the 113 input resistant matching problem of coplanar microstrip line, the impedance of entering viewed from impedance matching output equals the conjugation of band pass filter 104,109,113 input impedance, to realize the transmission of maximum power, then, band pass filter is accessed.

Described band pass filter 104,109,113, for other frequency signal beyond filtering center operating frequency, reduces noise jamming.Owing to often organizing antenna 101,108,112, there is different operating frequencies, so band pass filter 104, band pass filter 109 and band pass filter 113 have different center operating frequency, identical with its operating frequency of antenna.Described diode will by band pass filter 104,109,113RF signal is converted to direct current signal, and is connected with DC filter.Because the signal amplitude through often organizing band pass filter output is different, so the operating voltage of diode 105, diode 110 and diode 114 is different, should select different models, native system selects the MA4E1317 series of MACOM company.

Described DC filter 106,111,115 is for AC signal in further filtering direct current signal.Although the signal exported through diode 105,110,114 is all direct current signal, but clutter is different in each direct current signal, this is because each direct current signal is converted by different frequency AC signal, so DC filter 106, DC filter 111 are different with DC filter 115 center operating frequency.Reality should be noted that differentiation when design.

Each end direct voltage is added by described adder 107.

The advantage that the present invention is compared with prior art had: the electromagnetic wave in space, not increasing under circuit design difficulty prerequisite, effectively can be converted to direct voltage, for the driving of successive load by the present invention.

Accompanying drawing explanation

Fig. 1 is the electrical block diagram of one embodiment of the invention.

Fig. 2 is the structural representation of the complanar line of one embodiment of the invention, band pass filter and balun circuit.

Embodiment

In order to more understand technology contents of the present invention, accompanying drawing is coordinated to be described as follows especially exemplified by specific embodiment.

As shown in Figure 1, according to preferred embodiment of the present invention, a kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage, comprise: three groups of loop aerials 101,108,112, article three, complanar line 102, three band pass filters 104,109,113, three diodes 105,110,114, three DC filter, 106,111,115 and adder 107;

As shown in Figure 2,116 is complanar line to the microstrip line implementation structure schematic diagram of complanar line and balun circuit, and 117 is balun circuit.

Circuit space special frequency channel electromagnetic wave being converted to direct voltage of the present embodiment, three groups of loop aerials are symmetrically placed in complanar line both sides, often organizing antenna is all operated in different center frequency points, for receiving the electromagnetic wave of space different frequency range, to increase the summation of received energy, rear class termination match circuit, impedance matching circuit is for solving input impedance and the band pass filter 104 of coplanar microstrip line, 109, 113 input resistant matching problems, the impedance of entering viewed from impedance matching output equals band pass filter 104, 109, the conjugation of 113 input impedance, to realize the transmission of maximum power, then, access band pass filter 104, 109, 113.Other frequency signal beyond the center operating frequency that band pass filter 104,109,113 is often organized for filtering, reduces noise jamming.Diode 105,110,114 by three groups by bandpass filtering 104,109,113RF signal is converted to direct current signal, and be connected with DC filter 106,111,115, the middle AC signal of the further filtering direct current signal of DC filter 106,111,115, each end direct voltage is added by last adder 107, drives suitable load.

In band pass filter 104, its central band passband rate is 900MHz, is connected with after 105pF Capacitance parallel connection by 0.3nH inductance with 56nH inductance, then is in series with the parallel circuits that 0.3nH inductance and 105pF electric capacity form; In described band pass filter 109, its central band passband rate is 915MHz, is connected with after 106pF Capacitance parallel connection by 0.3nH inductance with 57nH inductance, then is in series with the parallel circuits that 0.3nH inductance and 106pF electric capacity form; In described band pass filter 113, its central band passband rate is 92d5MHz, is connected with after 107pF Capacitance parallel connection by 0.3nH inductance with 57nH inductance, then is in series with the parallel circuits that 0.3nH inductance and 107pF electric capacity form.

A kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage that the present embodiment proposes, is not increasing under circuit design difficulty prerequisite, effectively space special frequency channel electromagnetic wave can be converted to direct voltage, for the driving of successive load.

Claims

1. space special frequency channel electromagnetic wave is converted to a circuit for direct voltage, it is characterized in that: have three groups of loop aerials (101,108,112), three complanar lines (102), three band pass filters (104,109,113), three diodes (105,110,114), three DC filter (106,111,115) and adders (107);

Described loop aerial (101,108,112) symmetry is placed, and n forms one group, and the antenna often in group has identical operating frequency, and three groups have different operating frequency, often organizes rear class and is all connected with complanar line (102);

Described complanar line (102) is connected with impedance matching circuit (103);

Described band pass filter (104,109,113) for the electromagnetic wave signal of other frequency range beyond filtering centre frequency, and connects diode (105,110,114) respectively afterwards;

RF signal is converted to direct current signal by described three diodes (105,110,114), and is connected with adder (107).

2. a kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage according to claim 1, is characterized in that: described three groups of loop aerials (101,108,112) center operating frequency is respectively 910MHz, 915MHz and 925MHz.

3. a kind of circuit space special frequency channel electromagnetic wave being converted to direct voltage according to claim 1, is characterized in that: described diode (105,110,114) is Xiao Te diode.