CN212257700U - Reconfigurable rectifying antenna system based on microprocessor control - Google Patents
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Abstract
The utility model discloses a reconfigurable rectifying antenna system based on microprocessor control, which comprises a rectifying antenna system and a microprocessor system, wherein the rectifying antenna system comprises a receiving antenna and a rectifying circuit; the microprocessor system is connected with the rectifying circuit and the receiving antenna; the receiving antenna is a reconfigurable rectifying antenna; the receiving antenna comprises a main radiating patch and parasitic patches distributed around the main radiating patch; the microprocessor system comprises a microprocessor, an OLED liquid crystal display screen and a pull-down resistor connected with the microprocessor. The microprocessor system judges and determines the optimal working mode of the rectifying antenna system by comparing the direct current energy obtained by the receiving antenna in each incoming wave direction, working frequency band or polarization mode according to the type of the receiving antenna, and finally controls the working state of the switch to enable the rectifying antenna system to output the highest direct current power; the utility model has the characteristics of control is nimble, intelligent self-adaptation etc, and application prospect is wide.
Description
Technical Field
The utility model relates to a microwave antenna technical field, concretely relates to restructural rectenna system based on microprocessor control.
Background
Microwave energy transmission, which adopts microwave energy to transmit energy through free space and then converts the energy into direct current energy, wherein a rectenna is one of important devices in a microwave energy transmission system. At present, the single-mode rectenna has single application occasion and can not meet the requirements of users. Therefore, the rectennas have been developed toward multi-mode, small-sized antennas. The reconfigurable technology proposed by d.schaubert, i.e. the function of multiple antennas is realized by using one antenna structure, so that the antennas are miniaturized and multi-mode. Reconfigurable antennas are of several types: frequency reconfigurable, polarization reconfigurable, and pattern reconfigurable antennas. The directional diagram reconfigurable or polarization reconfigurable antenna controls different radiation characteristics (such as beam direction or polarization mode) of the antenna by switching the state of a switch on a parasitic patch, so that the antenna receives incoming waves in different directions under high gain or reduces polarization loss, and the free space transmission efficiency is improved; the frequency reconfigurable antenna can enable the antenna to work better under different working frequencies by controlling the state of a controllable device on the antenna. And the rectifying circuit converts the electromagnetic wave energy received by the antenna into direct current electric energy to be supplied to a load. Therefore, the reconfigurable technology is introduced into the rectifying antenna, the rectifying antenna can work in a multi-mode, flexibly receives electromagnetic incoming waves with different frequencies, directions or polarizations in the surrounding space, and is converted into direct current by the rectifying circuit to provide electric energy for electronic equipment.
In a microwave energy transmission system with a plurality of transmitting antennas, the incoming wave direction of electromagnetic beams in a space, the optimal working frequency of a receiving antenna and the polarization mode are often unknown, and a directional diagram, a frequency and polarization reconfigurable rectifying antenna can become one of feasible schemes for detecting and receiving the unknown incoming wave direction and selecting the frequency and the polarization mode. The receiving antenna works in the optimal state by controlling the state of the switch, receives the incoming wave radio frequency energy and converts the incoming wave radio frequency energy into direct current energy. In order to flexibly control the switch state, an adaptive incoming wave detection and mode selection microprocessor system is needed, which can control the switch state on the rectifying antenna in real time and receive the incoming wave energy of the surrounding space. By comparing the DC energy, the working mode of the antenna is detected and determined, so that the rectifying antenna can output the highest DC power.
The document "Yangxuexia, Meihuan, Zhugore. Dual polarization direction backtracking rectenna array design and experiment [ J ] electric wave science report, 2018,33(4):380-386.DOI:10.13443/J. cjors.2018071801.", discloses a direction backtracking rectenna array consisting of a dual polarization direction backtracking VanAtta array and a differential rectifying circuit, which can avoid the rapid reduction of the conversion efficiency of the rectenna caused by the misalignment of receiving beams and the polarization mismatch of a receiving and transmitting antenna, so that the rectenna can still keep stable direct current output when the incident angle is wide and the polarization is random. Although it can automatically control the beam scanning direction, the beam direction scanning angle is limited, and omnidirectional scanning cannot be realized.
The literature "Dongtian Wen, ren Xiao Fei, He Shao Lin and Li Xiang. A reconfigurable antenna design [ J/OL ] based on AFSS, the science of electric waves, 1-8[2020-05-12], discloses a reconfigurable antenna based on an Active Frequency Selective Surface (AFSS). The AFSS can be in a reflection mode and a transmission mode mutually in two frequency bands of 3.4-3.6GHz and 4.8-5.0GHz, the two modes are controlled by controlling the on-off state of the PIN diode, so that electromagnetic waves excited by the omnidirectional feed source antenna are regulated and controlled, different working modes (reflection or transmission modes) are provided in different frequency bands, the antenna can realize dynamic beam scanning, and the omnidirectional \ directional beam switching and 360-degree beam scanning functions are respectively realized in the two frequency bands. However, it is necessary to artificially control the bias voltage of the dc power supply to control the state of the switch, and adaptive control of the switch state cannot be achieved.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a mode selection control reconfigurable rectenna system based on microprocessor, reconfigurable rectenna (directional diagram, frequency, polarization reconfigurable antenna) have different wave beam orientation (but omnidirectional scanning), operating frequency or the mode of polarization's mode of operation, receive microwave energy under different operating mode to convert it into direct current energy through rectifier circuit. The state of a switch on the patch of the reconfigurable rectifying antenna is controlled by the microprocessor system, and different working modes of the antenna are intelligently switched.
The utility model adopts the following technical proposal:
a reconfigurable rectifying antenna system based on microprocessor control is characterized by comprising a rectifying antenna system and a microprocessor system, wherein the rectifying antenna system comprises a receiving antenna and a rectifying circuit;
the microprocessor system is connected with the rectifying circuit and the receiving antenna;
the receiving antenna is a reconfigurable rectifying antenna;
the microprocessor system controls the working mode of the rectenna system;
according to the type of the receiving antenna, the microprocessor system judges and determines the optimal working mode of the rectifying antenna by comparing the voltage amplitude values obtained by rectifying the receiving antenna in each incoming wave direction, working frequency band or polarization mode through the rectifying circuit, and controls the working state of the switch so that the rectifying antenna system outputs the highest direct current power.
Preferably, the microprocessor system comprises a microprocessor, a pull-down resistor connected with the microprocessor and an OLED liquid crystal display screen connected with the microprocessor.
Preferably, the reconfigurable rectenna is one of a directional diagram reconfigurable rectenna, a frequency reconfigurable rectenna or a polarization reconfigurable rectenna.
Preferably, the receiving antenna comprises a main radiating patch and a parasitic patch distributed around the main radiating patch, and the parasitic patch is provided with a switch.
Preferably, the rectifying circuit comprises an inverted L-shaped microstrip line, a complex impedance compression network circuit and two secondary rectifying circuits, wherein the complex impedance compression network circuit is connected in series with one of the secondary rectifying circuits and then connected in parallel with the other secondary rectifying circuit, and is connected in series with the inverted L-shaped microstrip line after being connected in parallel.
Preferably, the complex impedance compression network is a pi-type microstrip branch.
Preferably, the secondary rectification circuit comprises a capacitor C and a through filter which are connected in series, a diode connected in parallel is arranged between the capacitor C and the through filter, the diode is connected in series with a microstrip line L, and one end of the microstrip line L, which is far away from the diode, is grounded.
A control method of a reconfigurable rectenna system based on microprocessor control comprises the following steps:
a1, sequentially closing switches on the parasitic patches, detecting electromagnetic parameters of incoming waves in a free space according to the type of the reconfigurable rectifying antenna, and pre-judging the voltage amplitude of the detected radio frequency energy rectified and output by the rectifying circuit and the set threshold voltage amplitude;
a2, comparing the voltage amplitude after rectification output of each mode of the rectification antenna system by the microprocessor system, and keeping the switch state of the maximum voltage amplitude;
a3, using the following formula to determine the switch state of the rectenna system corresponding to the maximum incoming wave energy detected in the step A2:
f＝fn×10(n-1)+fn-1×10(n-2)+fn-2×10(n-3)+fn-3×10(n-4)+......
setting the binary number string of n bits to obtain a control quantity;
in the formula (f)nThe switching state values which are output after the parasitic patch corresponding to the nth switch is judged are respectively 0 for opening and 1 for closing; and the subscript f is greater than or equal to 1; n represents the number of parasitic patches, and n is a positive integer;
a4, according to different control quantities, determining the working mode of the rectifying antenna system, displaying the working mode on the OLED liquid crystal display screen, and the microprocessor system adaptively closing the switch on the corresponding parasitic patch and converting the switch into direct current energy to supply to the load.
Preferably, the electromagnetic parameters include an operating frequency band, a polarization mode and a beam direction.
The utility model has the advantages that:
the utility model discloses a direct current energy size that obtains under each incoming wave direction, different working frequency bands or different polarization mode of comparison rectenna system, the best mode of operation of self-adaptation ground judgement and definite antenna finally according to the characteristic of incoming wave, microprocessor control on-off state, unknown incoming wave energy of reconfigurable rectenna receipt and convert the direct current energy into and supply with the load.
Drawings
In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the reconfigurable rectenna of the present invention;
fig. 3 is a schematic diagram of the beam direction of the directional diagram reconfigurable rectenna of the present invention in the Mode 1;
fig. 4 is a schematic diagram of the beam direction of the directional diagram reconfigurable rectenna of the present invention in the Mode 2;
fig. 5 is a schematic diagram of the beam direction of the directional diagram reconfigurable rectenna of the present invention in the Mode 3;
FIG. 6 is a schematic diagram of the structure of the rectifying circuit of the present invention;
fig. 7 is a schematic diagram of the structure of the microprocessor and the pull-down resistor according to the present invention;
fig. 8 is a schematic diagram of the encoding flow of the microprocessor of the present invention.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The present invention will be further explained with reference to the drawings and examples.
Example 1
As shown in fig. 1, a reconfigurable rectenna system based on microprocessor control comprises a rectenna system and a microprocessor system, wherein the rectenna system comprises a receiving antenna and a rectifying circuit;
the receiving antenna is a directional diagram reconfigurable rectification antenna.
As shown in fig. 2, the receiving antenna includes a circular patch and four parasitic patches distributed around the circular patch; the four parasitic patches are respectively provided with a switch S1, a switch S2, a switch S3 and a switch S4; the rectifying antenna system works in different modes according to different states of the switch, and can realize an omnidirectional radiation mode and a wide-beam omnidirectional scanning mode due to the directivity and the emittance of the parasitic patch, and can receive incoming wave energy from different directions in space.
As shown in fig. 6, the rectifying circuit includes an inverted L-shaped microstrip line, a Complex Impedance Compression Network (CICN) circuit and two secondary rectifying circuits, where the Complex Impedance Compression Network (CICN) circuit is connected in series with one of the secondary rectifying circuits, then connected in parallel with the other secondary rectifying circuit, and then connected in series with the inverted L-shaped microstrip line after being connected in parallel.
The inverted L-shaped microstrip line comprises a microstrip line L1 and a microstrip line L2, one end of the microstrip line L2 is connected with the output end of the receiving antenna, the other end of the microstrip line L2 is connected with the input ends of the Complex Impedance Compression Network (CICN) circuit and the secondary rectifying circuit, and the microstrip line L1 is arranged at the left end of the microstrip line L2;
the Complex Impedance Compression Network (CICN) circuit is a pi-type microstrip branch.
The secondary rectification circuit comprises a capacitor C and a through filter which are connected in series, a diode connected in parallel is arranged between the capacitor C and the through filter, the diode is connected with a microstrip line L in series, one end, far away from the diode, of the microstrip line L is grounded, and the through filter is HSMS 2850;
the microprocessor system is connected with the rectifying circuit and the receiving antenna;
the microprocessor system judges and determines the optimal working mode of the receiving antenna by comparing the direct current energy obtained by the rectifying antenna system in each incoming wave direction, controls the switching state on the corresponding parasitic patch, and ensures that the rectifying antenna system receives the free space energy and outputs the highest direct current power;
as shown in fig. 7, the microprocessor system includes a microprocessor, an OLED liquid crystal display, and a pull-down resistor connected to the microprocessor, wherein the microprocessor is of a type HT66F 0185;
the pull-down resistors are respectively provided with a resistor R1, a resistor R2, a resistor R3 and a resistor R4 on pins PB3, PB4, PC1 and PC 2; the output voltage of the pin of the microprocessor is about 3.3V, the voltage is reduced to 1.0V through the pull-down resistor, and the phenomenon that the switch is broken down due to overlarge voltage is avoided, so that the state of the switch is controlled better.
The resistor R3 and the resistor R4 are respectively connected with the switch S1 and the switch S2; the resistor R1 and the resistor R2 are respectively connected with the switch S4 and the switch S3;
the microprocessor is connected with the switch S1, the switch S2, the switch S3 and the switch S4 through pins PB3, PB4, PC1 and PC2 to control the switching state of the parasitic patch, so that different working modes of the receiving antenna are switched, and the rectifying antenna system works in the optimal working mode;
a pin PA3 of the microprocessor is connected with the output end of the rectifying circuit, and the input end of the rectifying circuit is connected with the output end of the receiving antenna;
the OLED liquid crystal display screen is connected with pins PC3, PC4, PC5 and PC6 of the microprocessor.
A control method of a reconfigurable rectenna system based on microprocessor control aims at a directional diagram reconfigurable rectenna and comprises the following steps:
1. incoming wave energy in all directions around the rectifying antenna system is detected in sequence, and the amplitude of the direct current voltage output after the detected radio frequency energy is rectified by the rectifying circuit is pre-judged with the set threshold voltage. Because the incoming wave direction in the free space is unknown, and the gain of the rectifying antenna system under different modes is different in each direction, the received incoming wave energy is different, and the voltage output by the rectifying circuit is also different. In order to avoid misjudgment of the incoming wave direction by the micro direct current voltage/current output by the rectification antenna system due to the sidelobe of the rectification antenna system, a threshold value is set in the microprocessor, and the threshold value is calculated according to a France transmission formula and the rectification efficiency:
the fries transmission formula:
PR: receiving power of a receiving antenna; (waiting quantity)
PT: the transmit power of the transmit antenna;
GT: gain of the transmitting antenna in the receiving direction of the receiving antenna;
due to the 360 deg. omni-directional scanning, it is inevitable that the main beams generated by the different modes of operation will have overlapping portions, GRThe maximum value of the gain of the intersection point of two adjacent main beams and the gain at the position of the 3dB main beam width is obtained;
λ: the operating wavelength of the antenna;
r: the distance of the transmitting and receiving antenna;
v: the calculated threshold voltage;
RL: a load resistance value of the rectifying circuit;
and the microprocessor compares and judges the magnitude between the direct current energy received and converted by the rectenna system and the threshold, and when the output voltage is greater than the threshold, the microprocessor judges that the received electromagnetic wave is large enough and effective, otherwise, the microprocessor ignores the electromagnetic wave.
2. And keeping the switch states of the rectenna system corresponding to the maximum incoming wave energy detected from all directions in the steps, wherein the switch states are represented by 0 and 1.1 indicates that the switch is closed and 0 indicates that the switch is open;
in particular, the method comprises the following steps of,
sequentially closing each switch S1, S2, S3 and S4, and detecting the energy of incoming waves in the direction of the coordinate axis of the rectenna system;
closing the adjacent switch states in sequence, and detecting the incoming wave energy in the diagonal direction of the coordinate axis of the receiving antenna;
and calculating the control quantity by using a formula:
f＝f4×1000+f3×100+f2×10+f1
in the formula (f)1,f2,f3,f4Respectively representing the switch state values output after judgment of the parasitic patches corresponding to the switch S4, the switch S3, the switch S2 and the switch S1; if the incoming wave energy is detected completely, the amplitude of the voltage output after rectification by the rectifying circuit is found to be the same, at the moment, the switch is in a fully closed or disconnected state, f1,f2,f3,f4Are both 1 or 0.
3. According to the control quantity f, the final optimal working mode of the antenna can be determined and the wave direction can be judged, the microprocessor system starts a switch on the corresponding parasitic patch, and the receiving antenna receives incoming wave energy and converts the incoming wave energy into direct current to supply to a load;
because there are 4 switches on the receiving antenna, so set up a four-digit binary number string in the microprocessor, each bit represents the state of the corresponding switch, the open-close state of the switch is different, then the working mode of the rectification antenna system is different too. According to this principle, the result after the judgment is set as such a four-bit binary number string, and the control amount is obtained. Outputting the control quantity to a rectifying antenna system to control the opening and closing of a switch at a corresponding position, and simultaneously outputting the control quantity to an OLED liquid crystal display screen;
specifically, as shown in table 1:
TABLE 1 corresponding relationship table of binary digit string and pattern
3. When f is 1000, 0100, 0010, 0001, the receiving antenna respectively works in the states of the corresponding directional modes mode1.1, mode1.2, mode1.3, mode1.4, the corresponding main lobe beam directions are respectively 0 °, 90 °, 180 °, 270 °, and the microprocessor system adaptively opens the switch on the corresponding parasitic patch and converts the switch into direct current to supply to the load;
4. when f is 1100, 0110, 0011, 1001, the receiving antenna works in the states of the corresponding directional modes mode2.1, mode2.2, mode2.3, and mode2.4, respectively, the directions of the corresponding main lobe beams are 45 °, 135 °, 225 °, and 315 °, respectively, and the microprocessor system adaptively turns on the switches (two adjacent switches are turned on) on the corresponding parasitic patches and converts the signals into direct current to supply to the load;
5. when f is 1111 or 0000, the receiving antenna operates in the omnidirectional radiation Mode3, and all switches are adaptively turned off in consideration of the loss of the switches, and the 0000 operation Mode is selected, and simultaneously, incoming wave energy from all directions is received and converted into direct current to be supplied to a load.
The utility model provides a microprocessor system is as a central control system, is applied to the reconfigurable antenna of different grade type to the best mode selection of coming the detection of ripples electromagnetic parameter and reconfigurable rectenna itself, include based on the detection of directional diagram reconfigurable antenna to the incoming wave direction, based on frequency reconfigurable rectenna to the detection of coming the ripples frequency and based on polarization reconfigurable rectenna to the detection of coming the ripples polarization etc. through the selection of controllable device (switch, diode etc.) realization best mode on the control antenna.
Example 2
A21, sequentially detecting incoming wave energy of different frequencies (for frequency reconfigurable rectifying antennas) or different polarizations (for polarization reconfigurable rectifying antennas) in a free space, pre-judging the voltage amplitude of the output of the detected radio frequency energy after rectification by a rectifying circuit and the set threshold voltage amplitude, and avoiding misjudgment of a microprocessor system caused by side lobes;
because the frequency and the polarization in the free space are unknown, and the gain of the rectification antenna system under different modes is different under different polarizations and different frequencies, the received incoming wave energy is different, and the voltage output by the rectification circuit is also different. In order to avoid misjudgment of the incoming wave direction by the micro direct current voltage/current output by the rectification antenna system due to the side lobe of the rectification antenna system, a threshold value is set in the microprocessor system, and the threshold value is calculated according to a Frans transmission formula and the rectification efficiency:
the fries transmission formula:
PR: receiving power of a receiving antenna; (waiting quantity)
PT: the transmit power of the transmit antenna;
GT: gain of the transmitting antenna in the receiving direction of the receiving antenna;
if the beams have overlapping parts in different working modes, GRThe maximum value of the gain of the intersection point of two adjacent main beams and the gain at the position of the 3dB main beam width is obtained; if there is no overlapping part of the beams in different working modes, GRAre different from each otherMinimum gain value at 3dB main beam width in mode.
λ: the operating wavelength of the antenna;
r: the distance of the transmitting and receiving antenna;
v: the calculated threshold voltage;
RL: a load resistance value of the rectifying circuit;
and the microprocessor system compares and judges the magnitude between the direct current energy received and converted by the rectifying antenna system and a threshold value, and when the output voltage is greater than the threshold value, the microprocessor system judges that the received electromagnetic wave is large enough and effective, otherwise, the microprocessor system ignores the received electromagnetic wave.
A22, comparing the voltage amplitude after rectification output of each mode of the rectification antenna system by the microprocessor system, and keeping the switch state of the maximum voltage amplitude to be 0, 1.1 indicates that the switch is closed and 0 indicates that the switch is open; and calculating the switching state of the rectification antenna system corresponding to the maximum value after comparison by using a formula to obtain a control quantity:
f＝f4×1000+f3×100+f2×10+f1
in the formula (f)1,f2,f3,f4Respectively representing the switch state values output after judgment of the parasitic patches corresponding to the switch S4, the switch S3, the switch S2 and the switch S1; if the incoming wave energy is detected completely, finding that the output voltage amplitude after rectification of the rectification circuit is the same, and at the moment, fully closing/opening the switch, f1,f2,f3,f4Are both 1 or 0.
If the receiving antenna is a frequency reconfigurable rectifying antenna:
when f is 1000, 0100, 0010, 0001, the receiving antenna works in the corresponding Mode1, the corresponding frequency is 5.8GHz, and at the moment, the microprocessor system adaptively turns on only a switch on one parasitic patch to receive and convert the radio-frequency incoming wave of 5.8 GHz;
when f is 1100, 0110, 0011 and 1001, the receiving antenna works in a corresponding Mode2, the corresponding frequency is 5.2GHz, and at the moment, the microprocessor system adaptively turns on switches on two adjacent parasitic patches to receive and convert a radio frequency incoming wave of 5.2 GHz;
when f is 1111 or 0000, the receiving antenna operates in the Mode3, and the corresponding frequencies are 5.2GHz and 5.8GHz, and at this time, the microprocessor system adaptively opens or closes the switches on all the parasitic patches, and simultaneously receives the incoming wave energy of 5.2GHz and 5.8GHz and converts the incoming wave energy into direct current to supply to the load. It is noted that unlike the pattern reconfigurable rectenna, where f is 1111 and 0000, the pattern can be kept consistent, but the operating frequency of the antenna is different, so according to the antenna design, the microprocessor compares the output dc voltage amplitude to finally determine whether the antenna is in the 0000 or 1111 operating mode.
If the receiving antenna is a polarized reconfigurable rectifying antenna
When f is 1000, 0100, 0010, 0001, the receiving antenna works in the corresponding Mode1, the corresponding antenna polarization is in a linear polarization Mode, and at the moment, the microprocessor system adaptively turns on only a switch on one parasitic patch to realize receiving and converting the corresponding linearly polarized radio frequency incoming wave;
when f is 1100, 1001, 0110 and 0011, the receiving antenna works in the corresponding Mode3, the corresponding antenna polarization is the left-hand circular polarization Mode (right-hand circular polarization Mode), and at this time, the microprocessor system adaptively closes the switch on the corresponding parasitic patch to receive and convert the incoming radio frequency wave in the left-hand circular polarization Mode (right-hand circular polarization);
the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (7)
1. A reconfigurable rectifying antenna system based on microprocessor control is characterized by comprising a rectifying antenna system and a microprocessor system, wherein the rectifying antenna system comprises a receiving antenna and a rectifying circuit;
the microprocessor system is connected with the rectifying circuit and the receiving antenna;
the receiving antenna is a reconfigurable rectifying antenna;
the microprocessor system controls the mode of operation of the rectenna system.
2. The microprocessor-based reconfigurable rectenna system of claim 1, wherein the microprocessor system comprises a microprocessor, a pull-down resistor coupled to the microprocessor, and an OLED liquid crystal display coupled to the microprocessor.
3. The microprocessor-based reconfigurable rectenna system of claim 2, wherein the reconfigurable rectenna is one of a pattern reconfigurable rectenna, a frequency reconfigurable rectenna, or a polarization reconfigurable rectenna.
4. The microprocessor-based reconfigurable rectenna system of claim 3, wherein the receiving antenna comprises a main radiating patch and parasitic patches distributed around the main radiating patch, wherein the parasitic patches are provided with switches.
5. The reconfigurable rectenna system based on microprocessor control of claim 1, wherein the rectifying circuits comprise inverted-L microstrip lines, a complex impedance compression network circuit and two secondary rectifying circuits, wherein the complex impedance compression network circuit is connected in series with one of the secondary rectifying circuits and then connected in parallel with the other secondary rectifying circuit, and then connected in series with the inverted-L microstrip lines.
6. The reconfigurable rectenna system based on microprocessor control as claimed in claim 5, wherein the complex impedance compression network is a pi-type microstrip stub.
7. The reconfigurable rectifying antenna system based on microprocessor control according to claim 6, wherein the secondary rectifying circuit comprises a capacitor C and a through filter connected in series, a diode connected in parallel is arranged between the capacitor C and the through filter, the diode is connected in series with a microstrip line L, and one end of the microstrip line L far away from the diode is grounded.
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