CN108321552B

CN108321552B - Radio frequency energy transmission device, radio frequency energy hunting device and radio frequency energy transmission method thereof

Info

Publication number: CN108321552B
Application number: CN201710035323.8A
Authority: CN
Inventors: 黄尊禧; 杨昇帆; 陈俊丞; 锺佩蓉; 吴芳铭
Original assignee: Delta Electronics Inc
Current assignee: Delta Electronics Inc
Priority date: 2017-01-17
Filing date: 2017-01-17
Publication date: 2020-09-22
Anticipated expiration: 2037-01-17
Also published as: CN108321552A

Abstract

The disclosure relates to a radio frequency energy transmission device, a radio frequency energy hunting device and a radio frequency energy transmission method thereof. A radio frequency energy transfer device with polarization tracking is applied to a radio frequency energy hunting device. The radio frequency energy transmission device with polarization tracking comprises a power radar transmitting module and a radar control module. The power radar transmitting module receives a power signal source and transmits an electromagnetic wave source through a polarized antenna (or an antenna array). The radar control module is electrically connected to the power radar transmitting module and receives a reflected wave source. The frequency of the reflected wave source is different from that of the electromagnetic wave source and is the second harmonic of the electromagnetic wave source; the radio frequency energy hunting device generates and transmits a reflected wave source after receiving the electromagnetic wave source; after the radar control module receives the reflected wave source, the polarization angle of the reflected wave source of the radio frequency energy hunting device is judged, and the polarization angle of the antenna in the power radar transmitting module is adjusted to be in accordance with a preset angle with the polarization angle of the reflected wave source of the radio frequency energy hunting device, so that the optimal received energy is achieved.

Description

Radio frequency energy transmission device, radio frequency energy hunting device and radio frequency energy transmission method thereof

Technical Field

The present disclosure relates to a radio frequency energy transmission device with polarization tracking, a radio frequency energy hunting device and a radio frequency energy transmission method thereof, and more particularly to a radio frequency energy transmission device, a radio frequency energy hunting device and a radio frequency energy transmission method thereof applying tracking of second harmonic reflection.

Background

As the Internet of Things (IOT) issues become more and more important, the related sensor charging issues become more and more important. In contrast, the number of sensors is a multiple of the core circuit (data processing center) of the main body of the internet of things, so that the sensors are very popular. Some sensors are simple and simple in circuit function (e.g., only responsible for sending a single specific message of the surrounding environment, such as temperature or some physical quantity, back to the data processing center), so the power consumption of such sensors can be substantially very small (from a few microwatts or even as small as tens of nanowatts). In this sense, the concept of hunting electronics, which obtains the electrical energy required by the sensor to operate from the surrounding environment, will become the mainstream in the future. In the prior art, thermoelectric conversion and piezoelectric conversion are mainly discussed. The radio frequency energy transmission is a mainstream technology breaking through long-distance energy transmission, and the labor cost for replacing the battery of the sensor can be saved.

The conventional technology of applying electromagnetic wave Energy conversion is mostly developing an electromagnetic wave Energy hunter (Energy Harvesters) circuit capable of hunting the existing Radio broadcasting (Radio) or wireless base Stations (Wifi Stations) around the environment. However, the problem of polarization of the two antennas is a challenge between the energy transmitter and the energy hunting device. Based on the application requirements, in order to address the thin, small and small features, the types and the number of antennas used in most sensors are often limited. For example, energy hunting devices on the energy receiving end often employ planar antennas fabricated on Printed Circuit Boards (PCBs), but are limited by the requirements of circuit simplification, low power consumption, and small size after integration, and often only have a single polarization antenna design choice. In addition, in the case of a wireless energy transmission system with an energy transmitter and a hunting transmitter, the placement direction of the energy transmitter is often fixed; however, in the case of the hunting device body, whether it is fixed or mobile, it is likely that the antenna polarization direction of the hunting device cannot be exactly the same as that of the energy transmitter with respect to the energy transmitter, so that the energy receiving efficiency of the hunting device is compromised. While the use of a circularly polarized antenna or multiple differently directed antennas at the energy hunter end may improve the reception efficiency problem, such a solution requires a larger antenna footprint. On the other hand, the circular polarized antenna is used at the energy transmitter end and the circular polarized antenna is not used at the receiving end, so that the energy hunting device can only receive the wireless energy transmission energy with large time and small time.

Therefore, how to design a rf energy transmission device with polarization tracking, an rf energy transmission device with positioning and polarization tracking, an rf energy hunting device and an rf energy transmission method thereof are important. After the energy receiving end enhances the intensity of the reflected harmonic wave to facilitate correct positioning of the energy receiving end, the energy transmitter starts the function of antenna polarization automatic tracking to improve the overall conversion efficiency of the radio frequency wireless energy transmission system.

Disclosure of Invention

To solve the above problems, the present invention provides a radio frequency energy transmission device with polarization tracking to overcome the problems of the prior art. Therefore, the radio frequency energy transmission device with the polarization tracking is applied to a radio frequency energy hunting device, and comprises a power radar transmitting module and a radar control module. The power radar transmitting module receives a power signal source and transmits an electromagnetic wave source through a polarized antenna. The radar control module is electrically connected to the power radar transmitting module and receives a reflected wave source. Wherein the frequency of the reflected wave source is different from the frequency of the electromagnetic wave source; the radio frequency energy hunting device generates and transmits a reflected wave source after receiving the electromagnetic wave source; after the radar control module receives the reflected wave source, the polarization angle of the reflected wave source of the radio frequency energy hunting device is judged, and the polarization angle of the polarized antenna of the power radar transmitting module and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle so as to achieve the optimal received energy.

In one embodiment, the reflected wave source is a second harmonic of the electromagnetic wave source.

In one embodiment, the power radar transmission module includes a power distribution unit, a first adjustment unit, a polarized antenna: the power distribution unit receives a power signal source. The first adjusting unit is electrically connected with the power distribution unit and the radar control module. The polarized antenna is electrically connected to the first adjusting unit. The power distribution unit distributes a power signal source to the first adjusting unit; the radar control module outputs a first adjusting signal to the first adjusting unit after receiving the reflected wave source; after the first adjusting unit receives the first adjusting signal, the first adjusting unit adjusts the power signal source to be a first signal to the polarized antenna so as to change the polarization angle of the polarized antenna.

In an embodiment, the first adjusting unit includes a first adjusting path and a second adjusting path, and the first adjusting path and the second adjusting path adjust the amplitude of the power signal source to be the first signal according to the first adjusting signal; or after the amplitude of the power signal source is adjusted according to the first adjusting signal, the phase is switched to be the first signal.

In one embodiment, the polarized antenna includes a vertically polarized antenna and a horizontally polarized antenna. The vertical polarization antenna is electrically connected to the first adjustment path, and the horizontal polarization antenna is electrically connected to the second adjustment path. Wherein, a first adjusting voltage of the first signal changes the amplitude or amplitude and phase of the vertical polarization antenna, so as to adjust the polarization angle of the vertical polarization antenna; a second adjustment voltage of the first signal changes the amplitude or amplitude and phase of the horizontally polarized antenna, thereby adjusting the polarization angle of the horizontally polarized antenna.

In one embodiment, the radar control module includes a receiving antenna, a power detection unit, and a first control unit. The receiving antenna receives the reflected wave source, and the power detection unit is electrically connected with the receiving antenna. The first control unit is electrically connected between the power detection unit and the first adjustment unit. After the power detection unit judges the power of the reflected wave source, a first control signal is output to the first control unit, and the first control unit adjusts the first adjusting unit according to the first control signal.

In an embodiment, the power detection unit further includes a parameter storage unit, wherein the parameter storage unit stores a setting parameter of the polarized antenna when the rf energy hunting device outputs the maximum power.

In one embodiment, the setting parameter at least includes a control parameter of a predetermined angle, and the control parameter of the predetermined angle is a polarization angle at which the radio frequency energy hunting device outputs the maximum power.

In an embodiment, the rf energy transmission device further includes a communication unit electrically connected to the radar control module. The communication unit provides the radio frequency energy transmission device to communicate with other radio frequency energy transmission devices.

To solve the above problems, the present invention provides a radio frequency energy transmission device with positioning and polarization tracking to overcome the problems of the prior art. Therefore, the radio frequency energy transfer device with positioning and polarization tracking is applied to a radio frequency energy hunting device, and comprises a power radar transmitting module and a radar control module. The power radar transmitting module receives a power signal source and transmits an electromagnetic wave source through an antenna array. The radar control module is electrically connected to the power radar transmitting module and receives a reflected wave source. Wherein the frequency of the reflected wave source is different from the frequency of the electromagnetic wave source; the power radar transmitting module transmits an electromagnetic wave source to scan a space; the radio frequency energy hunting device generates and transmits a reflected wave source after receiving the electromagnetic wave source; after the radar control module receives the reflected wave source, the position and the polarization angle of the reflected wave source of the radio frequency energy hunting device are judged, the direction of the electromagnetic wave source is adjusted to face the radio frequency energy hunting device, and then the polarization angle of the power radar transmitting module antenna array and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle so as to achieve the optimal received energy.

In one embodiment, the power radar transmission module includes a power distribution unit, a second adjustment unit, a first adjustment unit, and an antenna array. The power distribution unit receives a power signal source. The second adjusting unit is electrically connected with the power distribution unit and the radar control module. The first adjusting unit is electrically connected with the second adjusting unit and the radar control module. The antenna array is electrically connected to the first adjusting unit. The power distribution unit distributes a power signal source to the second adjusting unit; after receiving the reflected wave source, the radar control module outputs a second adjusting signal to the second adjusting unit and outputs a first adjusting signal to the first adjusting unit; after the second adjusting signal adjusts the phase of the power signal source, a second signal is output to the first adjusting unit; the first adjusting unit outputs a first signal to the antenna array after adjusting the second signal according to the first adjusting signal, so as to change the direction of the antenna array towards the radio frequency energy hunting device and change the polarization angle of the antenna array.

In one embodiment, the first adjusting unit includes a first adjusting path and a second adjusting path, and the first adjusting path and the second adjusting path adjust the amplitude of the second signal into the first signal according to the first adjusting signal; or after the amplitude of the second signal is adjusted according to the first adjusting signal, the phase is switched to be the first signal.

In one embodiment, the antenna array comprises: at least one vertically polarized antenna electrically connected to the first adjusting path. At least one horizontally polarized antenna electrically connected to the second adjusting path. Wherein a first adjustment voltage of the first signal changes a direction and a polarization angle of at least one vertically polarized antenna; a second adjustment voltage of the first signal changes the direction and polarization angle of at least one horizontally polarized antenna.

In one embodiment, the radar control module includes a receiving antenna, a first control unit, and a second control unit. A receiving antenna for receiving the reflected wave source. The power detection unit is electrically connected with the receiving antenna. The first control unit is electrically connected between the power detection unit and the first adjustment unit. The second control unit is electrically connected between the power detection unit and the second adjustment unit. After the power detection unit judges the power of the reflected wave source, a first control signal is output to the first control unit, and a second control signal is output to the second control unit; the first control unit adjusts the first adjusting unit according to the first control signal, and the second control unit adjusts the second adjusting unit according to the second control signal.

In one embodiment, the second control unit includes a position determination unit and a phase delay control unit. The position determining unit is electrically connected with the power detecting unit, and the phase delay control unit is electrically connected between the position determining unit and the second adjusting unit. The position judging unit judges the position of the radio frequency energy hunting device according to the second control signal and outputs position information to the phase delay control unit; the phase delay control unit adjusts the second adjusting signal according to the position information.

In an embodiment, the power detection unit further includes a parameter storage unit, wherein the parameter storage unit stores a setting parameter of the antenna array when the rf energy hunting device outputs the maximum power.

In one embodiment, the setting parameters at least include a direction of the antenna array and a control parameter of a predetermined angle, and the control parameter of the predetermined angle is a polarization angle at which the radio frequency energy hunting device outputs maximum power.

In one embodiment, the rf energy transmission device further includes: and the communication unit is electrically connected with the radar control module. The communication unit provides the radio frequency energy transmission device to communicate with other radio frequency energy transmission devices.

To solve the above problems, the present invention provides a radio frequency energy transmission device with polarization tracking to overcome the problems of the prior art. Therefore, the radio frequency energy hunting device of the invention is applied to a radio frequency energy transmission device with polarization tracking or positioning and polarization tracking, wherein the radio frequency energy hunting device comprises a wave source transceiver module, a power module and a resonance unit. The wave source transceiver module receives an electromagnetic wave source and emits a reflected wave source. The power module is electrically connected with the wave source transceiver module. The resonance unit is electrically connected with the wave source transceiver module. After the wave source transceiver module receives the electromagnetic wave source, an alternating current source is output to the power module, and a reflection signal is generated to the resonance unit; the resonance unit enhances the signal intensity of the reflected signal to be a reflected wave source and outputs the reflected wave source to the wave source transceiver module; after the wave source transceiver module receives the reflected wave source, the reflected wave source is transmitted to the radio frequency energy transmitting device with polarization tracking or positioning and polarization tracking, so that the polarization angle of the radio frequency energy transmitting device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle.

In a first embodiment, the source transceiver module includes a transceiver antenna, a circulator unit, and a matching unit. The transceiver antenna receives the electromagnetic wave source and transmits the reflected wave source. The circulator unit is electrically connected between the transceiving antenna and the resonant unit. The matching unit is electrically connected between the circulator unit and the resonant unit. When the receiving and transmitting antenna receives the electromagnetic wave source, the electromagnetic wave source is output to the matching unit through the circulator unit; after receiving the electromagnetic wave source, the matching unit outputs an alternating current source to the power module and outputs a reflection signal to the resonance unit; when the resonance unit enhances the signal intensity of the reflected signal to be a reflected wave source, the signal is output to the wave source transceiver module through the circulator unit, and the harmonic wave is radiated out through the wave source transceiver module to form a reflected wave source.

In the first embodiment, the reflected wave source is the second harmonic of the electromagnetic wave source.

In a first embodiment, the rf hunting apparatus further comprises: a switch unit electrically connected between the matching unit and the resonant unit. And the energy storage unit is electrically connected with the power module and the switch unit. When the matching unit receives the electromagnetic wave source, the switch unit is conducted, the matching unit outputs a reflection signal to the resonance unit, the power module outputs a direct current source to charge the energy storage unit, and bias voltage is generated in the energy storage unit to gradually close the switch unit so as to gradually close the electrical connection between the resonance unit and the matching unit; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle, the energy storage unit is charged to the closing switch unit so as to close the electrical connection between the resonance unit and the matching unit.

In a first embodiment, the power module includes a rectifying unit and a processing unit. The rectifying unit is electrically connected between the matching unit and the energy storage unit, and the processing unit is electrically connected with the rectifying unit. When the rectifying unit receives an alternating current source, the alternating current source is converted into a direct current source, and the energy storage unit is charged; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle, the rectifying unit supplies a direct current source to the processing unit.

To solve the above problems, the present invention provides a radio frequency energy transmission device with polarization tracking to overcome the problems of the prior art. Therefore, the radio frequency energy hunting device of the invention is applied to a radio frequency energy transmission device with polarization tracking or positioning and polarization tracking, wherein the radio frequency energy hunting device comprises a wave source transceiver module, a power module and a resonance unit. The wave source transceiver module receives an electromagnetic wave source and emits a reflected wave source. The power module is electrically connected with the wave source transceiver module. The resonance unit is electrically connected with the wave source transceiver module and the power module. After receiving the electromagnetic wave source, the wave source transceiver module outputs an alternating current source to the power module, and the power module generates a reflection signal to the resonance unit; the resonance unit enhances the signal intensity of the reflected signal to be a reflected wave source and outputs the reflected wave source to the wave source transceiver module; after the wave source transceiver module receives the reflected wave source, the reflected wave source is transmitted to the radio frequency energy transmitting device with polarization tracking or positioning and polarization tracking, so that the polarization angle of the radio frequency energy transmitting device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle.

In a second embodiment, the source transceiver module includes a transceiver antenna, a circulator unit and a matching unit. The receiving and transmitting antenna receives the electromagnetic wave source and transmits the reflected wave source. The circulator unit is electrically connected between the transceiving antenna and the resonant unit. The matching unit is electrically connected with the circulator unit. When the receiving and transmitting antenna receives the electromagnetic wave source, the electromagnetic wave source is output to the matching unit through the circulator unit; after receiving the electromagnetic wave source, the matching unit outputs an alternating current source to the power module, and the power module outputs a reflection signal to the resonance unit; when the resonance unit enhances the signal intensity of the reflected signal to be a reflected wave source, the signal is output to the wave source transceiver module through the circulator unit, and the harmonic wave is radiated out through the wave source transceiver module to form a reflected wave source.

In a second embodiment, the reflected wave source is the second harmonic of the electromagnetic wave source.

In a second embodiment, the rf hunting device further includes a switch unit and an energy storage unit. The switch unit is electrically connected between the power module and the resonant unit and receives a reference voltage. The energy storage unit is electrically connected with the power module. When the matching unit receives the electromagnetic wave source, the switch unit is conducted, the power module outputs a reflection signal to the resonance unit, the power module outputs a direct current source to charge the energy storage unit, and the reference voltage gradually closes the electrical connection between the resonance unit and the power module; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle, the reference voltage closes the switch unit so as to close the electrical connection between the resonance unit and the power module.

In a second embodiment, the power module includes a rectifying unit and a processing unit. The rectifying unit is electrically connected among the matching unit, the switch unit and the energy storage unit. The processing unit is electrically connected with the rectifying unit. When the rectifying unit receives the alternating current source, the alternating current source is converted into a direct current source, a reflection signal is output to the resonance unit, and the direct current source is output to charge the energy storage unit; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle, the switch unit closes the electrical connection between the resonance unit and the rectification unit, and the rectification unit supplies a direct current source to the processing unit.

To solve the above problems, the present invention provides a method for transmitting radio frequency energy with polarization tracking, so as to overcome the problems of the prior art. Therefore, the radio frequency energy transmission method with polarization tracking of the present invention comprises the following steps: (a) emitting an electromagnetic wave source; (b) receiving a reflected wave source emitted by a radio frequency energy hunting device, wherein the frequency of the electromagnetic wave source is different from that of the reflected wave source; (c) adjusting the polarization angle of a polarized antenna for transmitting the electromagnetic wave source; and (d) judging whether the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle. If the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, recording a set parameter which accords with the preset angle so as to provide the correct polarization direction of the polarized antenna.

In one embodiment, if the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the radio frequency energy hunting device are not within the predetermined angle, the step (c) is returned to.

In one embodiment, wherein the polarized antenna comprises a vertically polarized antenna and a horizontally polarized antenna, step (c) further comprises the sub-steps of: (c1) adjusting a first adjustment voltage to change the amplitude or amplitude and phase of the vertically polarized antenna, thereby adjusting the polarization angle of the vertically polarized antenna. (c2) Adjusting a second adjustment voltage to change the amplitude or amplitude and phase of the horizontally polarized antenna, thereby adjusting the polarization angle of the horizontally polarized antenna.

To solve the above problems, the present invention provides a radio frequency energy transmission method with positioning and polarization tracking to overcome the problems of the prior art. Therefore, the radio frequency energy transmission method with positioning and polarization tracking of the present invention comprises the following steps: (a) emitting an electromagnetic wave source to scan a space; (b) receiving a reflected wave source emitted by a radio frequency energy hunting device, wherein the frequency of the electromagnetic wave source is different from that of the reflected wave source; (c) adjusting the direction of an antenna array which transmits an electromagnetic wave source to face a radio frequency energy hunting device; (d) adjusting the polarization angle of the antenna array; and (e) determining whether the polarization angle of the antenna array and the polarization angle of the reflected wave source of the radio frequency energy hunting device are consistent with a predetermined angle. If the polarization angle of the antenna array and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, recording a set parameter which accords with the preset angle so as to provide the correct polarization direction of the polarized antenna.

In one embodiment, if the polarization angle of the antenna array and the polarization angle of the reflected wave source of the rf hunting device are not within the predetermined angle, the step (d) is returned to.

In one embodiment, wherein the antenna array comprises at least one vertically polarized antenna and at least one horizontally polarized antenna, step (d) further comprises the sub-steps of: (d1) adjusting a first adjustment voltage to change the amplitude or amplitude and phase of the vertically polarized antennas, thereby adjusting the polarization angles of the vertically polarized antennas. (d2) Adjusting a second adjustment voltage to change the amplitude or amplitude and phase of the horizontally polarized antenna, thereby adjusting the polarization angle of the horizontally polarized antenna.

For a further understanding of the techniques, means, and advantages of the invention adopted to carry out the intended purpose, reference should be made to the following detailed description of the invention and to the accompanying drawings which are included to provide a further understanding of the invention, its objects, features, and characteristics, and are therefore considered to be within the scope and spirit of the invention, and the description and drawings are to be construed as providing a further understanding of the invention and are not intended to limit the invention.

Drawings

FIG. 1 is a block diagram of an RF system with polarization tracking according to the present invention.

Fig. 2 is a block diagram of an rf energy transmission device with polarization tracking according to the present invention.

Fig. 3 is a block diagram of an rf energy transmission device with positioning and polarization tracking according to the present invention.

FIG. 4 is a block diagram of a first embodiment of the RF hunting device according to the present invention.

FIG. 5 is a block diagram of a second embodiment of the RF hunting device according to the present invention.

FIG. 6 is a flow chart of the RF energy transmission method with polarization tracking according to the present invention.

FIG. 7 is a flow chart of the RF energy transmission method with location and polarization tracking according to the present invention.

Description of reference numerals:

100 … radio frequency system with polarization tracking

100' … radio frequency system with location and polarization tracking

10. 10' … radio frequency energy transfer device

11 … power radar transmitting module

111 … power distribution unit

112 … first adjusting unit

112a … first adjustment path

R11 … first amplitude adjustment unit

R12 … first phase switching unit

112B … second adjustment path

R21 … second amplitude adjustment unit

R22 … second phase switching unit

113 … polarized antenna

113' … antenna array

114 … second adjustment unit

114A … switch group

114B … phase delay unit

AV … vertical polarization antenna

AH … horizontal polarization antenna

12 … radar control module

121 … receiving antenna

122 … power detection unit

122A … parameter storage unit

123 … first control unit

124 … second control unit

124A … position determination unit

124B … phase delay control unit

13 … communication unit

20 … radio frequency energy hunting device

21 … wave source transceiver module

211 … Transmit-receive antenna

212 … circulator unit

213 … matching unit

22 … power module

222 … second rectifying unit

223 … processing unit

23 … resonant cell

24 … switch module

242 … switch unit

244 … energy storage cell

A … first end

Second end of B …

Third end of C …

Vin … power signal source

Vac … AC source

Vdc … DC source

Vref … reference Voltage

F … electromagnetic wave source

2F … reflection wave source

θ p … predetermined angle

Polarization angle of theta h … radio frequency energy hunting device

Polarization angle of theta r … power radar transmitting module and polarization angle of polarized antenna

Polarization angle of theta rv … vertical polarization antenna

Polarization angle of theta rh … horizontal polarization antenna

S1 … first signal

S2 … second signal

Va1 … first regulated voltage

Va2 … second adjustment voltage

Sc1 … first control signal

Sc2 … second control signal

Sa1 … first adjustment signal

Sa2 … second adjustment signal

Ss … position Signal

Sr … reflected signal

Ps … setting parameter

(S100) to (S500) …

Detailed Description

The technical content and the detailed description of the invention are described as follows with the accompanying drawings:

fig. 1 is a block diagram of a radio frequency system with polarization tracking according to the present invention. The radio frequency system with polarization tracking 100 includes a radio frequency energy transmission device 10 and a radio frequency energy hunting device 20. The rf energy transmission device 10 includes a power radar transmitting module 11 and a radar control module 12. The power radar transmitting module 11 receives a power signal source Vin and transmits an electromagnetic wave source F. The radar control module 12 is electrically connected to the power radar transmitting module 11, and adjusts the power radar transmitting module 11 by receiving a reflected wave source 2F. The radio frequency energy hunting device 20 receives the electromagnetic wave source F transmitted by the power radar transmission module 11, and then generates and transmits the reflected wave source 2F to the radar control module 12. After the radar control module 12 receives the reflected wave source 2F, the polarization angle θ h of the reflected wave source 2F of the radio frequency energy hunting device 20 is determined, and the polarization angle θ r of the power radar transmitting module 11 is adjusted to achieve the optimal received energy.

Please refer to fig. 2, which is a block diagram of an rf energy transmission device with polarization tracking according to the present invention. Referring to fig. 1, the power radar transmitting module 11 includes a power distribution unit 111, a first adjusting unit 112, and a polarized antenna 113. The first adjusting unit 112 is electrically connected between the power distribution unit 111, the polarized antenna 113 and the radar control module 12. The power distribution unit 111 receives the power signal source Vin, and after being adjusted by the first adjusting unit 112, transmits the electromagnetic wave source F through the polarized antenna 113. The first adjusting unit 112 includes a first adjusting path 112A and a second adjusting path 112B. The first adjustment path 112A includes a first amplitude adjustment unit R11 and a first phase switching unit R12. The first amplitude adjustment unit R11 is electrically connected between the power distribution unit 111 and the first phase switching unit R12. The second adjustment path 112B includes a second amplitude adjustment unit R21 and a second phase switching unit R22. The second amplitude adjustment unit R21 is electrically connected between the power distribution unit 111 and the second phase switching unit R22. The polarized antenna 113 includes a vertically polarized antenna AV electrically connected to the first phase switch R12 and a horizontally polarized antenna AH electrically connected to the second phase switch R22. It should be noted that, taking fig. 2 as an example, the polarized antenna 113 is a linear polarized antenna composed of a vertically disposed half-wavelength linear antenna AV and a horizontally disposed half-wavelength linear antenna AH, but not limited thereto. In other words, the present invention is also intended to cover antennas with adjustable polarization angles.

As shown in fig. 2, and with reference to fig. 1. The radar control module 12 includes a receiving antenna 121, a power detection unit 122, and a first control unit 123. The power detection unit 122 is electrically connected between the receiving antenna 121 and the first control unit 123, and the first control unit 123 is electrically connected to the first adjustment unit 112. After the receiving antenna receives the reflected wave source 2F, the power detection unit 122 detects the power of the reflected wave source 2F. The power detection unit 122 further includes a parameter storage unit 122A, and the parameter storage unit 122A records a setting parameter Ps when the polarized antenna 113 is adjusted, so as to provide the polarized antenna 113 with the correct polarization direction.

As shown in fig. 2, and with reference to fig. 1. After receiving the power signal source Vin, the power distribution unit 111 distributes the power signal source Vin to the first adjustment unit 112. The first adjusting unit 112 adjusts the amplitude of the power signal source Vin to a first signal S1; or after adjusting the amplitude of the power signal source Vin, the phase is switched to a first signal S1, and the first signal S1 is outputted to the polarized antenna 113. The first signal S1 is a polarization adjustment signal for adjusting the polarization direction of the polarized antenna 113, and the polarized antenna 113 transmits the electromagnetic wave source F to the rf hunting device 20 after receiving the first signal S1. When the radio frequency energy hunting device 20 receives the electromagnetic wave source F, it emits the reflected wave source 2F. Wherein the reflected wave source 2F is the second harmonic of the electromagnetic wave source F, and therefore the frequency of the reflected wave source 2F is 2 times the frequency of the electromagnetic wave source F. When the receiving antenna 121 receives the reflected wave source 2F, the power detecting unit 122 detects the power of the reflected wave source 2F and outputs a first control signal Sc1 to the first control unit 123. At this time, the power detecting unit 122 stores the power value of the reflected wave source 2F in the parameter storage unit 122A. After receiving the first control signal Sc1, the first control unit 123 knows the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20. At this time, the first control unit 123 outputs a first adjustment signal Sa1 to adjust the amplitude and phase of the power signal source Vin, so as to adjust the polarization angle θ r of the polarized antenna 113. In the present embodiment, the parameter storage unit 122A is designed to record a setting parameter Ps when the polarized antenna 113 is adjusted, so as to provide the polarized antenna 113 with the correct polarization direction. Therefore, in the present embodiment, the parameter storage unit 122A is not limited to be disposed in the power detection unit 122. For example, but not limited to, the parameter storage unit 122A may be independent of the power detection unit 122 and electrically connected between the power detection unit 122 and the first control unit 123. It should be noted that in the embodiment, the frequency of the electromagnetic wave source F is 915MHz, and the frequency of the reflected wave source 2F is 1830MHz since the reflected wave source 2F is the second harmonic of the electromagnetic wave source F, but not limited thereto. Therefore, it is within the scope of the present embodiment that the frequency of the harmonic wave of the electromagnetic wave source F can be reached after the electromagnetic wave source F is transmitted.

As shown in fig. 2, and with reference to fig. 1. The first signal S1 includes a first adjustment voltage Va1 and a second adjustment voltage Va 2. The polarization angle θ r includes a polarization angle θ rv of the vertically polarized antenna AV, and a polarization angle θ rh of the horizontally polarized antenna AH. The power distribution unit 111 distributes the power signal source Vin to the first adjustment path 112A and the second adjustment path 112B of the first adjustment unit 112. The first amplitude adjusting unit R11 and the first phase switching unit R12 in the first adjusting path 112A adjust the amplitude of the power signal source Vin via the first adjusting signal Sa1, and the first phase switching unit R12 switches the phase of the amplitude-adjusted power signal source Vin to output the first adjusting voltage Va 1. Therefore, the first adjustment voltage Va1 of the first signal S1 changes the amplitude or the amplitude and the phase of the vertically polarized antenna AV, thereby adjusting the polarization angle θ rv of the vertically polarized antenna AV. The second amplitude adjustment unit R21 and the second phase switching unit R22 in the second adjustment path 112B adjust the amplitude of the power signal source Vin via the first adjustment signal Sa1, and the second phase switching unit R22 switches the phase of the amplitude-adjusted power signal source Vin to output a second adjustment voltage Va 2. Therefore, the second adjustment voltage Va2 of the first signal S1 changes the amplitude or amplitude and phase of the horizontally polarized antenna AH, thereby adjusting the polarization angle θ rh of the horizontally polarized antenna AH. The first adjusting unit 112 changes the polarization angle θ rv of the vertically polarized antenna AV by the varied first adjusting voltage Va1, and changes the polarization angle θ rh of the horizontally polarized antenna AH by the varied second adjusting voltage Va 2. The polarization angle thetar of the power radar transmission module 11 and the polarization angle thetah of the reflected wave source 2F of the rf hunting device 20 are adjusted to be within a predetermined angle thetap by changing the polarization angle thetavl of the vertical polarization antenna AV and changing the polarization angle thetahr of the horizontal polarization antenna AH. The predetermined angle thetap is the polarization angle thetar for adjusting the polarization angle thetar of the rf energy transmission device 10 to the polarization angle thetar at which the rf energy hunting device 20 can output the maximum power. Further, the first amplitude adjustment unit R11 and the second amplitude adjustment unit R12 mainly adjust the power signal source Vin to change the amplitudes of the vertical polarization antenna AV and the horizontal polarization antenna AH. The first phase switch unit R12 and the second phase switch unit R22 mainly provide a fixed 180 degree phase. However, the first phase switch unit R12 and the second phase switch unit R22 can provide 180 degrees and 360 degrees phase switching if required by the environment in which the power radar transmitter module 11 and the rf hunting device 20 are installed. Therefore, the first adjustment path 112A and the second adjustment path 112B can adjust the amplitude (fixed 180 degrees phase) of the power signal source Vin to be the first signal S1 according to the first adjustment signal Sa 1; or after adjusting the amplitude of the power signal source Vin according to the first adjustment signal Sa1, the phase (180 degrees or 360 degrees) is switched to the first signal S1. For example, but not limited to, the polarization angle θ r may be from 0 ° to 180 °, so the angle of the maximum output power may be found from the angle of 0 ° to 180 °. For example, but not limited to, when the horizontally polarized antenna is fixed at 0 ° phase, the amplitude of the two amplifier circuit signals can be controlled to obtain a polarized electric field vector of 0 ° to 90 ° when the vertical phase also corresponds to 0 °. And when the vertical phase is 180 deg., a polarization electric field of 0 deg. to-90 deg. can be obtained. If the horizontal phase is changed to 180 °, a polarization electric field vector of 90 ° to 270 ° can be obtained.

It should be noted that the polarization angle θ r at which the rf hunting device 20 can output the maximum power has a deviation value, and therefore the predetermined angle θ p is preferably within 10% of the polarization angle θ r at which the rf hunting device 20 can output the maximum power. In addition, the first adjusting unit 112 is intended to adjust the switching of the amplitudes and phases of the first and second adjusting voltages Va1 and Va2 of the first signal S1. Therefore, in the present embodiment, the means for adjusting the amplitude and the phase by the amplitude adjusting unit and the phase switching unit is not limited, and any device or apparatus capable of adjusting the amplitude and the phase should be included in the scope of the present embodiment. Furthermore, in the present embodiment, the reflected wave source 2F received by the radar control module 12 is intended to know the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20. Therefore, in the present embodiment, it is not limited that the reflected wave source 2F is the second harmonic, and it should be understood that the harmonic of the polarization angle θ h of the reflected wave source 2F of the radio frequency hunting device 20 is included in the scope of the present embodiment.

Refer to FIG. 2 in conjunction with FIG. 1. The rf energy transmission device 10 further includes a communication unit 13, wherein the communication unit 13 is electrically connected to the first control unit 123 in the radar control module 12, so as to provide the rf energy transmission device 10 to communicate with an external interface or other rf energy transmission devices (not shown). For example, but not limited to, a radio frequency energy transmission system (not shown) is provided, the radio frequency energy transmission system includes a plurality of radio frequency energy transmission devices 10, each radio frequency energy transmission device 10 includes a communication unit 13 electrically connected to the first control unit 123 of the radar control module 12, and each radio frequency energy transmission device 10 communicates with each other through the communication unit 13. When one of the rf energy transmitting devices 10 detects the rf energy hunting device 20, the communication unit 13 notifies the other rf energy transmitting devices 10 to prevent the rf energy transmitting device 10 from being limited by the Line-of-sight (Line-of-sight) and being unable to effectively transmit the electromagnetic wave source F to the rf energy hunting device 20.

Please refer to fig. 3, which is a block diagram of an rf energy transmission device with positioning and polarization tracking according to the present invention. Referring to fig. 1-2, the rf energy transmission device 100 ' with positioning and polarization tracking includes an rf energy transmission device 10 ', and one of the differences between the rf energy transmission device 10 ' and the rf energy transmission device 10 of fig. 2 is: the power radar transmitting module 11 further includes a second adjusting unit 114, wherein the second adjusting unit 114 is electrically connected between the power distribution unit 111 and the first adjusting unit 112, and receives and adjusts the power signal source Vin distributed by the power distribution unit 111. In addition, the first adjusting unit 112 is electrically connected to an antenna array 113'. The antenna array 113' comprises a plurality of polarized antennas (e.g. a polarized antenna array consisting of a plurality of polarized antennas 113). The polarized antenna 113 includes a vertically polarized antenna AV and a horizontally polarized antenna AH. The radar control module 12 further includes a second control unit 124, wherein the second control unit 124 is electrically connected between the power detection unit 122 and the second adjustment unit 114. Since the antenna array 113' is a polarized antenna array formed by a plurality of polarized antennas 113, the power radar transmitting module 11 can transmit the electromagnetic wave source F to scan a space (not shown) to know the position of the rf energy hunting device 20, thereby having a positioning function. When the RF energy transmitting device 10' positions the RF energy hunting device 20, the RF energy hunting device 20 is located at a higher energy density so that the RF energy hunting device 20 can extract a larger energy. After the radio frequency energy transmission device 10 'positions the radio frequency energy hunting device 20, the polarization angle θ r of the radio frequency energy transmission device 10' is adjusted to the polarization angle θ r at which the radio frequency energy hunting device 20 can output the maximum power by adjusting the polarization angles θ r of the polarized antennas 113.

As shown in fig. 3, and with reference to fig. 1-2. The second control unit 124 includes a position determination unit 124A and a phase delay control unit 124B. The position determining unit 124A is electrically connected between the power detecting unit 122 and the phase delay control unit 124B, and the phase delay control unit 124B is electrically connected to the second adjusting unit 114. The position determining unit 124A determines the position of the rf hunting device 20 by the reflected wave source 2F, and the phase delay control unit 124B controls the second adjusting unit 114 to adjust the phase of the power signal source Vin distributed by the power distribution unit 111.

Refer to FIG. 3 in conjunction with FIGS. 1-2. After receiving the power signal source Vin, the power distribution unit 111 distributes the power signal source Vin into a plurality of power signals to the second adjustment unit 114. The second adjusting unit 114 adjusts the phases of the plurality of power signals and then outputs a second signal S2 (including a plurality of phase-adjusted power signals) to the first adjusting unit 112. The second signal S2 is a positioning signal for adjusting the direction of the antenna array 113 'to a specific spatial position, so that the direction of the antenna array 113' can be adjusted and positioned by the second signal S2. The first adjusting unit 112 adjusts the amplitude of the second signal S2 to a first signal S1; or after adjusting the amplitude of the power signal source Vin, the phase is switched to the first signal S1, and the first signal S1 is output to the antenna array 113 ', and after the antenna array 113' receives the first signal S1, the transmitting electromagnetic wave source F scans a space (not shown). When the radio frequency energy hunting device 20 receives the electromagnetic wave source F, it emits the reflected wave source 2F. Wherein the reflected wave source 2F is the second harmonic of the electromagnetic wave source F, and therefore the frequency of the reflected wave source 2F is 2 times the frequency of the electromagnetic wave source F.

When the receiving antenna 121 receives the reflected wave source 2F, the power detecting unit 122 detects the power of the reflected wave source 2F, and outputs a first control signal Sc1 to the first control unit 123 and a second control signal Sc2 to the second control unit 124. At this time, the power detecting unit 122 stores the power value of the reflected wave source 2F in the parameter storage unit 122A. The second control unit 124 receives the second control signal Sc2, and then knows the position of the rf hunting device 20. The position determining unit 124A in the second control unit 124 determines the position of the rf hunting device 20 according to the second control signal Sc2 outputted from the received power detecting unit 122, and outputs a position signal Ss to the phase delay control unit 124B after determining the position of the rf hunting device 20. The phase delay control unit 124B outputs a second adjustment signal Sa2 to the second adjustment unit 114 according to the position signal Ss to adjust the phase of the power signal source Vin distributed by the power distribution unit 111. The second adjusting unit 114 adjusts the phase of the power signal source Vin distributed by the power distributing unit 111, and then outputs a second signal S2 to the first adjusting unit 112, where the second signal S2 corresponds to the position of the rf energy hunting device 20. The first adjusting unit 112 adjusts the second signal S2 to be the first signal S1, and outputs the first signal S1 to the antenna array 113 ', so as to change the direction of the electromagnetic wave source F emitted by the antenna array 113' toward the rf energy hunting device 20, and then emit the electromagnetic wave source F to the rf energy hunting device 20 again. It should be noted that the second control unit 124 controls the second adjusting unit 114 in a digital modulation control mode, or when the second control unit 124 is changed to an analog modulation control mode unit, the second adjusting unit 114 can be changed to an analog continuously adjustable phase adjusting unit, and the second control unit 124 is controlled in an analog modulation control mode.

When the radio frequency energy hunting device 20 receives the electromagnetic wave source F again, it emits the reflected wave source 2F again. When the receiving antenna 121 receives the reflected wave source 2F again, the power detecting unit 122 detects the power of the reflected wave source 2F and outputs a first control signal Sc1 to the first control unit 123. At this time, the power detecting unit 122 stores the power value of the reflected wave source 2F in the parameter storage unit 122A. After receiving the first control signal Sc1, the first control unit 123 knows the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20. At this time, the first control unit 123 outputs the first adjustment signal Sa1 to the first adjustment unit 112. The first adjusting unit 112 adjusts the amplitude of the second signal S2 or adjusts the amplitude and phase of the second signal S2 according to the first adjusting signal Sa1, and then outputs the first signal S1 to the antenna array 113'. The antenna array 113 'adjusts the polarization angle θ r of the polarized antennas 113 according to the first signal S1 to adjust the polarization angle θ r of the rf energy transmitting device 10' to the polarization angle θ r at which the rf energy hunting device 20 can output the maximum power. It should be noted that, in the present embodiment, the difference between the first adjusting unit 112 and the first embodiment of fig. 2 is that the first signal S1 of the first embodiment is only to adjust the amplitude or the amplitude and the phase of the polarized antenna 113. Since the rf energy transmission device 100 'of the present embodiment has the positioning function, the first signal S1 not only can adjust the amplitude or amplitude and phase of the polarized antenna 113, but also has the function of adjusting the antenna array 113'.

As shown in fig. 3, and with reference to fig. 1-2. The second adjusting unit 114 includes a switch set 114A and a phase delay unit 114B, and the second adjusting unit 114 adjusts the phase of the power signal source Vin distributed by the power distribution unit 111. The switch set 114A includes a plurality of switches (not shown), and the switch set 114A is electrically connected to the power distribution unit 111. The phase delay unit 114B includes a phase delay with a phase angle of 0 degree to-360 degrees, and is electrically connected between the switch set 114A and the first adjusting unit 112. The second adjusting unit 114 controls the switch group 114A to be turned on or off through the second adjusting signal Sa2, so that the power signal source Vin distributed by the power distributing unit 111 generates a phase delay of 0 to-360 degrees as the second signal S2. It should be noted that the antenna array 113 'may be arranged in one or two dimensions (for example, an antenna array formed by the polarized antenna 113 of 2x2 or a polarized antenna array formed by the polarized antenna 113 of 2x2 or more), and the second adjusting unit 114 is controlled by the second adjusting signal Sa2 to generate the second signal S2 with a phase delay of 0 degrees, +90 degrees or-90 degrees, so that the electromagnetic wave sources F generated by the antenna array 113' have different directions, and the optimal direction of the electromagnetic wave source F is determined by the position of the reflected wave source 2F of the radio frequency energy hunting device 20. Further, the second adjusting unit 114 aims to adjust the phase of the power signal source Vin distributed by the power distributing unit 111 by switching the phase delay having a phase angle of 0 degrees, +90 degrees, or-90 degrees. Therefore, in the present embodiment, the means for implementing the phase angle switching by the switch set and the phase delay unit is not limited, and any element or device capable of implementing the phase angle switching should be included in the scope of the present embodiment.

Refer to FIG. 3 in conjunction with FIGS. 1-2. The rf energy transmission device 10 'further includes a communication unit 13, wherein the communication unit 13 is electrically connected to the second control unit 124 of the radar control module 12 to provide the rf energy transmission device 10' to communicate with an external interface or other rf energy transmission devices (not shown). For example, but not limited to, a radio frequency energy transmission system (not shown) is provided, the radio frequency energy transmission system includes a plurality of radio frequency energy transmission devices 10 ', each radio frequency energy transmission device 10 ' includes a communication unit 13 electrically connected to the second control unit 124 of the radar control module 12, and each radio frequency energy transmission device 10 ' communicates with each other through the communication unit 13. When one of the rf energy transmitting devices 10 ' detects the rf energy hunting device 20, the communication unit 13 notifies the other rf energy transmitting devices 10 ' to prevent the rf energy transmitting device 10 ' from being limited by the Line-of-sight (Line-of-sight) and being unable to effectively transmit the electromagnetic wave source F to the rf energy hunting device 20. It is worth mentioning that the communication unit 13 is intended to communicate with an external interface or other rf-enabled devices, and therefore the communication unit 13 is not limited to be electrically connected to the second control unit 124. In other words, the communication unit 13 may be electrically connected to the first control unit 123 or the radar control module 12 as shown in fig. 2, and may be configured to communicate with an external interface or other rf energy transmission device.

Please refer to fig. 4, which is a block diagram of a first embodiment of the rf hunting device according to the present invention. Referring to fig. 1-3, the rf hunting device 20 includes a source transceiver module 21, a power module 22, and a resonant unit 23. The wave source transceiver module receives the electromagnetic wave source F and transmits the reflected wave source 2F. The power module 22 is electrically connected to the wave source transceiver module 21, and the resonance unit 23 is electrically connected to the wave source transceiver module 21. The wave source transceiver module 21 includes a transceiver antenna 211, a circulator unit 212, and a matching unit 213, and the transceiver antenna 211 receives the electromagnetic wave source F and transmits the reflected wave source 2F. The circulator unit 212 is electrically connected between the transceiver antenna 211 and the resonant unit 23, and the matching unit 213 is electrically connected between the circulator unit 212 and the resonant unit 23. The power module 22 includes a second rectifying unit 222 and a processing unit 223, wherein the second rectifying unit 222 is electrically connected between the matching unit 213 and the processing unit 223. It should be noted that in the embodiment, the processing unit 223 is a sensor circuit or an application function circuit with a separate tag, but not limited thereto. In other words, the processing unit 223 is only capable of supplying power to the back-end application device (not shown) and is included in the scope of the present embodiment. In addition, in the embodiment, the transceiver antenna 211 is a dual-band antenna, so that it can receive and transmit the wave source with different frequencies, but not limited thereto. Therefore, an antenna capable of receiving and transmitting wave sources with different frequencies is included in the scope of the present embodiment.

The circulator unit 24 includes a first terminal a electrically connected to the transceiver antenna 211, a second terminal B electrically connected to the matching unit 213, and a third terminal C connected to the resonant unit 23. The power or signal transmission path of the circulator unit 24 may be from the first terminal a to the second terminal B, from the second terminal B to the third terminal C, or from the third terminal C to the first terminal a. But not from the second terminal B to the first terminal a, from the third terminal C to the second terminal B or from the first terminal a to the third terminal C. It should be noted that in the embodiment, the circulator unit 24 is a circulator or an energy coupler, but not limited thereto. In other words, the circulator unit 212 capable of achieving the signal transmission path is included in the scope of the present embodiment.

Refer to FIG. 4 in conjunction with FIGS. 1-3. When the transceiver antenna 211 receives the electromagnetic wave source F, the electromagnetic wave source F is output to the matching unit 212 through the circulator unit 212 for impedance matching. The matching unit 212 outputs an ac source Vac to the second rectifying unit 222, and outputs a reflected signal Sr (second harmonic) to the resonant unit 23. The resonance unit 23 reinforces the signal intensity of the reflected signal Sr as the reflected wave source 2F, and outputs the reflected wave source 2F to the transmitting/receiving antenna 211. After the transceiver antenna 211 receives the reflected wave source 2F, it transmits the reflected wave source 2F to the rf energy transmission device 10 with polarization tracking or positioning and polarization tracking, so as to adjust the polarization angle θ r of the polarization antenna 113 of the rf energy transmission device 10 with polarization tracking or positioning and polarization tracking and the polarization angle θ h of the reflected wave source 2F of the rf energy hunting device 20 to conform to the predetermined angle θ p. The second rectifying unit 222 receives the ac source Vac, converts the ac source Vac into a dc source Vdc, and supplies the dc source Vdc to the processing unit 223.

As shown in fig. 4, and with reference to fig. 1-3. If the RF hunting device 20 does not have any large battery to maintain power; when the polarization angle θ r of the polarized antenna 113 of the rf energy transmission device 10 and the polarization angle θ h of the reflected wave source 2F of the rf energy hunting device 20 are consistent with the predetermined angle θ p, the resonant unit 23 can be turned off to save the power consumed by the rf energy transmission device 10. Therefore, the rf hunting device further includes a switch module 24, and the switch module 24 includes a switch unit 242 and an energy storage unit 244. The switching unit 242 is electrically connected between the matching unit 213 and the resonant unit 23, and the energy storage unit 244 is electrically connected to the second rectifying unit 222 and the switching unit 242 of the power module 22. The second rectifying unit 222 rectifies the ac source Vac into a dc source Vdc and charges the energy storage unit 244. Since the energy storage unit 244 is not charged when the second rectifying unit 222 starts to output the dc source Vdc, the energy storage unit 244 is short-circuited and cannot supply the processing unit 223 with the required electric energy. Since the energy storage unit 244 is short-circuited, the control terminal (gate terminal) of the switch unit 242 is low, and the switch unit 242 is turned on. Therefore, when the switch unit 242 is turned on, the resonant unit 23 increases the signal intensity of the reflected signal Sr to the reflected wave source 2F, and then transmits the reflected wave source 2F from the transmitting/receiving antenna 211 to the radio frequency energy transmission device 10 via the circulator unit 212. Since the dc source Vdc continuously charges the energy storage unit 244, a bias voltage is generated on the energy storage unit 244 to gradually turn off the switch unit 242, so as to gradually turn off the electrical connection between the resonant unit 23 and the matching unit 213. It should be noted that, since the matching unit 213 and the second rectifying unit 222 contain the reflected signal Sr (second harmonic) of the double frequency response, and the resonant unit 23 enhances the reflected signal Sr of the double frequency as the reflected wave source 2F, the rf energy transmission device 10 has a strong sensitivity when detecting the rf energy hunting device 20.

After the rf energy transmission device 10 receives the reflected wave source 2F and adjusts the polarization angle θ r of the polarized antenna 113 and the polarization angle θ h of the reflected wave source 2F of the rf energy hunting device 20 to be within the predetermined angle θ p, the energy storage unit 244 is charged by the dc source Vdc to stably supply the processing unit 223 with the required electric energy. And since the energy storage unit 244 has already established a potential, the control terminal (gate terminal) of the switch unit 242 is at a high potential, and the switch unit 242 is in an off state. Therefore, the energy storage unit 244 is charged by the dc source Vdc to turn off the switch unit 242, and thus the resonant unit 23 is turned off. At this time, the electromagnetic wave source F received by the transceiver antenna 211 is supplied to the processing unit 223 through the circulator unit 212, the matching unit 213, and the second rectifying unit 222. The switch module 24 controls the resonance unit 23 to be turned on or off, so as to save the power consumed by the radio frequency hunting device 20 during operation. It should be noted that when the energy storage unit 244 establishes a potential to turn off the switch unit 242, the polarization angle θ r of the polarized antenna 113 and the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20 may not be adjusted within the predetermined angle θ p, so that the rf hunting device 20 may not output the maximum power.

Therefore, a delay unit (not shown) can be added between the energy storage unit 244 and the switch unit 242, or between the second rectifying unit 222 and the energy storage unit 233. The delay unit (not shown) delays the time when the switch unit 242 is turned off to extend the time when the polarization antenna 113 adjusts the polarization angle θ r. So that the polarization angle thetar of the polarized antenna 113 and the polarization angle thetah of the reflected wave source 2F of the radio frequency hunting device 20 are within the predetermined angle thetap, thereby enabling the radio frequency hunting device 20 to output the maximum power. In addition, in the present embodiment, a PMOS transistor is used as the switch unit 242, but not limited thereto. In other words, any switch capable of turning on/off the switch is included in the scope of the present embodiment.

Please refer to fig. 5, which is a block diagram of a second embodiment of the rf hunting device according to the present invention. Referring to fig. 1 to 4, the difference between the present embodiment and the first embodiment is that the switch module 24 includes a switch unit 242 and an energy storage unit 2244, and the switch unit 242 and the energy storage unit 2244 are electrically connected to the second rectifying unit 222. The switch unit 242 receives a reference voltage Vref, and controls on/off of the switch unit 242 by the reference voltage Vref. The second rectifying unit 222 outputs the reflected signal Sr to the resonance unit 23, and the resonance unit 23 enhances the reflected signal Sr to the circulator unit 212 as the reflected wave source 2F.

Refer to FIG. 5 in conjunction with FIGS. 1-4. When the transceiver antenna 211 receives the electromagnetic wave source F, the electromagnetic wave source F is output to the matching unit 213 through the circulator unit 212 for impedance matching, and the matching unit 213 outputs an ac source Vac to the second rectifying unit 222. The second rectifying unit 222 rectifies the ac source Vac into a dc source Vdc, outputs a reflected signal Sr (second harmonic) to the resonant unit 23, and supplies the dc source Vdc to charge the energy storage unit 244. .

As shown in fig. 5, and with reference to fig. 1-4. If the RF hunting device 20 does not have any large battery to maintain power; when the polarization angle θ r of the polarized antenna 113 of the rf energy transmission device 10 and the polarization angle θ h of the reflected wave source 2F of the rf energy hunting device 20 are consistent with the predetermined angle θ p, the resonant unit 23 can be turned off to save the power consumed by the rf energy transmission device 10. Therefore, when the second rectifying unit 222 starts to output the dc source Vdc, the energy storage unit 244 is not charged yet, and therefore the energy storage unit 244 is short-circuited and cannot supply the processing unit 223 with the required electric energy. At this time, the reference voltage Vref cannot turn on/off the switch unit 244 or no reference voltage Vref is input to the switch unit 244, so the control terminal (gate terminal) of the switch unit 244 is low, and the switch unit 244 is turned on. When the switch unit 244 is turned on, the resonance unit 23 increases the signal intensity of the reflected signal Sr to the reflected wave source 2F, and then transmits the reflected wave source 2F from the transmitting/receiving antenna 211 to the radio frequency energy transmission device 10 via the circulator unit 212. And since the dc source Vdc continuously charges the energy storage unit 244 to establish the bias voltage to supply the power required for the operation of the back-end processing unit 223. When the dc source Vdc continuously charges the energy storage unit 244, the reference voltage Vref gradually turns off the electrical connection between the resonant unit 23 and the second rectifying unit 222 of the power module 22.

After the rf energy transmission device 10 receives the reflected wave source 2F and adjusts the polarization angle θ r of the polarized antenna 113 and the polarization angle θ h of the reflected wave source 2F of the rf energy hunting device 20 to be within the predetermined angle θ p, the energy storage unit 244 is charged by the dc source Vdc to stably supply the processing unit 223 with the required electric energy. When the energy storage unit 244 has established a potential and can supply the processing unit 223 with the required power, the switch unit 242 is turned off by the reference voltage Vref, and the resonant unit 23 is turned off. At this time, the electromagnetic wave source F received by the transceiver antenna 211 is supplied to the processing unit 223 through the paths of the circulator unit 212, the matching unit 213, and the second rectifying unit 222. It should be noted that, in the present embodiment, as in the first embodiment, a delay unit (not shown) may be added between the second rectifying unit 222 and the energy storage unit 233. The delay unit (not shown) delays the time when the switch unit 242 is turned off to extend the time when the polarization antenna 113 adjusts the polarization angle θ r. So that the polarization angle thetar of the polarized antenna 113 and the polarization angle thetah of the reflected wave source 2F of the radio frequency hunting device 20 are within the predetermined angle thetap, thereby enabling the radio frequency hunting device 20 to output the maximum power. In addition, the reference voltage Vref is used to turn off the resonant unit 23 when the energy storage unit 244 is charged to a level that can stably supply the electric energy required by the operation of the processing unit 223. Therefore, the source of the reference voltage Vref is supplied by the RF hunting device 20. For example, but not limited to, the reference voltage Vref is provided by the processing unit 223. When the processing unit 223 can operate stably, the reference voltage Vref is sent to turn off the switch unit 242.

Please refer to fig. 6, which is a flowchart illustrating a method for transmitting rf energy with polarization tracking according to the present invention. Referring to fig. 1-5, the method for transmitting energy by radio frequency for polarization tracking includes: first, an electromagnetic wave source is emitted (S100). Electromagnetic wave source F is transmitted through a radio frequency energy transmission device 10 to a radio frequency energy hunting device 20. Then, a reflected wave source emitted by the radio frequency hunting device is received (S200). After receiving the electromagnetic wave source F, the rf energy hunting device 20 transmits the reflected wave source 2F to the rf energy transmitting device 10, and the reflected wave source 2F is the second harmonic of the electromagnetic wave source F. Then, the polarization angle of the polarized antenna is adjusted (S300). After the rf energy transmission device 10 receives the reflected wave source 2F, the reflected wave source 2F generates a first adjustment signal Sa1 to adjust a first signal S1 in the rf energy transmission device 10, so as to adjust the polarization angle θ r of the polarized antenna 113 in the rf energy transmission device 10. The first signal S1 includes a first adjustment voltage Va1 and a second adjustment voltage Va2, the first adjustment voltage Va1 is used to change the amplitude or amplitude and phase of the vertically polarized antenna AV, and further adjust the polarization angle θ rv of the vertically polarized antenna AV, and the second adjustment voltage Va2 is used to change the amplitude or amplitude and phase of the horizontally polarized antenna AH, and further adjust the polarization angle θ rh of the horizontally polarized antenna AH. It should be noted that, after the rf energy transmitting device 10 adjusts the polarization angle θ r of the polarized antenna 113 through the first signal S1, the setting parameter Ps can be recorded in the parameter storage unit 122A. The setting parameters Ps include, but are not limited to, the polarization angle θ r adjusted by the polarized antenna 113, the corresponding power and maximum power (dB value) output by the rf hunting device 20, the voltage values of the first adjustment voltage Va1 and the second adjustment voltage Va2, and the impedance value (Ω) adjusted by the polarized antenna 113. Then, it is determined whether the polarization angle of the polarized antenna and the radio frequency energy hunting device is in accordance with a predetermined angle (S400). The predetermined angle thetap is a polarization angle thetar for adjusting the polarization angle thetar of the radio frequency energy transmission device 10 to a polarization angle thetar at which the radio frequency energy hunting device 20 can output the maximum power, and the radio frequency energy transmission device 10 determines whether the polarization angle thetar of the polarized antenna 113 and the polarization angle thetah of the reflected wave source 2F of the radio frequency energy hunting device 20 are within the predetermined angle thetap.

Refer to FIG. 6 in conjunction with FIGS. 1-5. If the polarization angle θ r of the polarized antenna 113 and the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20 are within a predetermined angle θ p, it represents that the power of the reflected wave source 2F outputted by the rf hunting device 20 is the maximum power. Therefore, the parameter corresponding to the predetermined angle θ p is recorded as the setting parameter Ps in the parameter storage unit 122A, so as to provide the polarized antenna 113 with the correct polarization direction. The recorded setting parameter Ps is a control parameter of the predetermined angle θ p, and the control parameter of the predetermined angle θ p includes the current polarization angle value θ r, the power output by the radio frequency energy hunting device 20, the voltage values of the first adjustment voltage Va1 and the second adjustment voltage Va2, and the impedance value (Ω) of the polarized antenna 113 after adjustment. If the polarization angle thetar of the polarized antenna 113 and the polarization angle thetah of the reflected wave source 2F of the radio frequency energy hunting device 20 are not within the predetermined angle thetap, the step (S400) is returned, and the polarization angle thetar of the polarized antenna 113 is continuously adjusted until the polarization angle thetar at which the radio frequency energy hunting device 20 can output the maximum power is obtained.

Please refer to fig. 7, which is a flowchart illustrating an rf energy transmission method with positioning and polarization tracking according to the present invention. Referring to fig. 1-6, the method for transmitting energy by radio frequency for polarization tracking includes: first, a source of emitted electromagnetic waves is scanned into space (S100). The electromagnetic wave source F is transmitted by a RF transmitter 10' to scan into a space (not shown) to try to know the position of the RF hunting device 20. Then, a reflected wave source emitted by the radio frequency hunting device is received (S200). After receiving the electromagnetic wave source F, the rf hunting device 20 transmits the reflected wave source 2F to the rf energy transmitting device 10'. After the radio frequency energy transmission device 10' receives the reflected wave source 2F, the position of the radio frequency energy hunting device 20 is known, wherein the reflected wave source 2F is the second harmonic of the electromagnetic wave source F. Then, the direction of the transmitting electromagnetic wave source F is adjusted toward the radio frequency energy hunting device (S300). The rf energy transmission device 10 'detects the reflected wave source 2F to generate a second adjustment signal Sa2 and adjusts a second signal S2 in the rf energy transmission device 10' to adjust the direction in which an antenna array 113 'in the rf energy transmission device 10' emits the electromagnetic wave source F. After the position of the rf energy transmission device 10 'is known, the direction of the electromagnetic wave source F emitted by the antenna array 113' is adjusted to face the rf energy hunting device 20, so that the rf energy hunting device 20 has a higher energy density at the position, and the rf energy hunting device 20 can capture a larger energy. Then, the polarization angle of the antenna array is adjusted (S400). After the rf energy transmission device 10 'adjusts the antenna array 113' to emit the electromagnetic wave source F toward the rf energy hunting device 20 and receives the reflected wave source 2F again, the first adjustment signal Sa1 is generated by detecting the reflected wave source 2F and a first signal S1 in the rf energy transmission device 10 'is adjusted to adjust the polarization angle θ r of the polarized antennas 113 in the antenna array 113'. The polarized antenna 113 includes a vertically polarized antenna AV and a horizontally polarized antenna AH. The first signal S1 includes a first adjustment voltage Va1 and a second adjustment voltage Va2, the first adjustment voltage Va1 is used to change the amplitude or amplitude and phase of the vertically polarized antenna AV, and further adjust the polarization angle θ rv of the vertically polarized antenna AV, and the second adjustment voltage Va2 is used to change the amplitude or amplitude and phase of the horizontally polarized antenna AH, and further adjust the polarization angle θ rh of the horizontally polarized antenna AH. It should be noted that after the rf energy transmitting device 10 'adjusts the polarization angle θ r of the antenna array 113' through the first signal S1, the setting parameter Ps can be recorded in the parameter storage unit 122A, so as to provide the polarized antenna 113 with the correct polarization direction. The setting parameters Ps include, but are not limited to, the direction of the antenna array 113 ', the adjusted polarization angle θ r of the antenna array 113 ', the corresponding power and maximum power (dB) output by the rf energy hunting device 20, the voltage values of the first adjustment voltage Va1 and the second adjustment voltage Va2, and the adjusted impedance (Ω) of the antenna array 113 '. Then, it is determined whether the polarization angle of the antenna array and the rf energy hunting device is consistent with a predetermined angle (S500). The predetermined angle thetap is the polarization angle thetar for adjusting the polarization angle thetar of the radio frequency energy transmission device 10 ' to the polarization angle thetar for outputting the maximum power by the radio frequency energy hunting device 20, and the radio frequency energy transmission device 10 ' determines whether the polarization angle thetar of the antenna array 113 ' and the polarization angle thetah of the reflected wave source 2F of the radio frequency energy hunting device 20 are within the predetermined angle thetap.

Refer to FIG. 7 in conjunction with FIGS. 1-6. If the polarization angle θ r of the antenna array 113' and the polarization angle θ h of the reflected wave source 2F of the rf hunting device 20 are within a predetermined angle θ p, it represents that the power of the reflected wave source 2F outputted by the rf hunting device 20 is the maximum power. Therefore, the parameter corresponding to the predetermined angle θ p is recorded as the setting parameter Ps in the parameter storage unit 122A, so as to provide the polarized antenna 113 with the correct polarization direction. The recorded setting parameter Ps is a control parameter of the predetermined angle θ p, and the control parameter of the predetermined angle θ p includes the current direction of the antenna array 113 ', the polarization angle value θ r, the power output by the radio frequency energy hunting device 20, the voltage values of the first adjustment voltage Va1 and the second adjustment voltage Va2, and the adjusted impedance value (Ω) of the antenna array 113'. If the polarization angle θ r of the antenna array 113 'and the polarization angle θ h of the reflected wave source 2F of the radio frequency energy hunting device 20 are not within the predetermined angle θ p, the process returns to step (S400), and the polarization angle θ r of the antenna array 113' is continuously adjusted until the polarization angle θ r at which the radio frequency energy hunting device 20 can output the maximum power is obtained.

In summary, the present invention has the following advantages:

1. the resonance unit is used to provide a reflection wave source with a larger reflection coefficient to provide the radio frequency energy transmission device for adjusting and controlling the phase of the polarized antenna so as to correspond to the energy of the radiation electromagnetic field of the radio frequency energy hunting device.

2. The energy of the back-end processing unit is supplied only by the electromagnetic wave source, and the angle of the polarized antenna is adjusted by the reflected wave source, so that the power consumption requirement of the identification communication module can be reduced.

3. The polarization direction of the antenna can be automatically tracked through the reflected wave source, so that the energy transmission efficiency of the radio frequency wireless energy transmission technology is improved.

4 integrating the antenna array positioning function and automatically tracking the polarization direction of the antenna, so as to achieve the technical effect of positioning and tracking the polarization direction without matching an additional positioning system with the radio frequency energy transmission device.

5. A radio frequency energy hunting device with both rectification and reflection frequency multiplication frequency characteristics is completed by utilizing an integrated structure of a resonance unit, a power unit and a double-frequency antenna, thereby reducing the complexity and cost of the circuit.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A radio frequency energy transfer device with polarization tracking is applied to a radio frequency energy hunting device and comprises:

the power radar transmitting module receives a power signal source and transmits an electromagnetic wave source; and

a radar control module, electrically connected to the power radar emission module, and receiving a reflected wave source;

wherein the frequency of the reflected wave source is different from the frequency of the electromagnetic wave source; the radio frequency energy hunting device generates and transmits the reflected wave source after receiving the electromagnetic wave source; after the radar control module receives the reflected wave source, the polarization angle of the reflected wave source of the radio frequency energy hunting device is judged, and the polarization angle of the power radar transmitting module and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle so as to achieve the best received energy,

wherein the power radar transmission module comprises:

a power distribution unit for receiving the power signal source;

the first adjusting unit is electrically connected with the power distribution unit and the radar control module; and

a polarized antenna electrically connected to the first adjusting unit;

wherein, the power distribution unit distributes the power signal source to the first adjustment unit; the radar control module outputs a first adjusting signal to the first adjusting unit after receiving the reflected wave source; after the first adjusting unit receives the first adjusting signal, the first adjusting unit adjusts the power signal source into a first signal to the polarized antenna so as to change the polarization angle of the polarized antenna.

2. The radio frequency energy transfer device with polarization tracking of claim 1, wherein the reflected wave source is the second harmonic of the electromagnetic wave source.

3. The radio frequency energy transmission device with polarization tracking according to claim 1, wherein the first adjusting unit comprises a first adjusting path and a second adjusting path, the first adjusting path and the second adjusting path adjust the amplitude of the power signal source to be the first signal according to the first adjusting signal; or after the amplitude of the power signal source is adjusted according to the first adjusting signal, the phase is switched to the first signal.

4. The radio frequency energy transfer device with polarization tracking of claim 3, wherein the polarized antenna comprises:

a vertical polarization antenna electrically connected to the first adjustment path;

a horizontal polarization antenna electrically connected to the second adjustment path;

wherein, a first adjusting voltage of the first signal changes the amplitude or amplitude and phase of the vertically polarized antenna, so as to adjust the polarization angle of the vertically polarized antenna; a second adjustment voltage of the first signal changes the amplitude or amplitude and phase of the horizontally polarized antenna, thereby adjusting the polarization angle of the horizontally polarized antenna.

5. The radio frequency energy transfer device with polarization tracking of claim 1, wherein the radar control module comprises:

a receiving antenna for receiving the reflected wave source;

a power detection unit electrically connected to the receiving antenna;

the first control unit is electrically connected between the power detection unit and the first adjusting unit;

the power detection unit outputs a first control signal to the first control unit after determining the power of the reflected wave source, and the first control unit adjusts the first adjustment unit according to the first control signal.

6. The radio frequency energy transmission device with polarization tracking according to claim 5, wherein the power detection unit further comprises a parameter storage unit, wherein the parameter storage unit stores a setting parameter of the polarized antenna when the radio frequency energy transmission device outputs the maximum power.

7. The RF energy transmission device with polarization tracking according to claim 6, wherein the setting parameters at least include a control parameter of the predetermined angle, and the control parameter of the predetermined angle is a polarization angle at which the RF energy transmission device outputs the maximum power.

8. The rf energy transmission device with polarization tracking of claim 1, wherein the rf energy transmission device further comprises:

the communication unit is electrically connected with the radar control module;

the communication unit provides the radio frequency energy transmission device to communicate with an external interface or other radio frequency energy transmission devices.

9. A radio frequency energy transfer device with positioning and polarization tracking is applied to a radio frequency energy hunting device, and comprises:

wherein the frequency of the reflected wave source is different from the frequency of the electromagnetic wave source; the power radar transmitting module transmits the electromagnetic wave source to scan a space; the radio frequency energy hunting device generates and transmits the reflected wave source after receiving the electromagnetic wave source; after the radar control module receives the reflected wave source, the position and the polarization angle of the radio frequency energy hunting device are judged, the direction of the electromagnetic wave source is adjusted to face the radio frequency energy hunting device, then the polarization angle of the power radar transmitting module and the polarization angle of the reflected wave source of the radio frequency energy hunting device are adjusted to accord with a preset angle so as to achieve the best received energy,

wherein the power radar transmission module comprises:

a power distribution unit for receiving the power signal source;

the second adjusting unit is electrically connected with the power distribution unit and the radar control module;

the first adjusting unit is electrically connected with the second adjusting unit and the radar control module; and

an antenna array electrically connected to the first adjusting unit;

wherein, the power distribution unit distributes the power signal source to the second adjustment unit; the radar control module outputs a second adjusting signal to the second adjusting unit and outputs a first adjusting signal to the first adjusting unit after receiving the reflected wave source; the second adjusting signal adjusts the phase of the power signal source and then outputs a second signal to the first adjusting unit; the first adjusting unit adjusts the second signal according to the first adjusting signal and then outputs a first signal to the antenna array so as to change the direction of the electromagnetic wave source emitted by the antenna array towards the radio frequency energy hunting device and change the polarization angle of the antenna array.

10. The radio frequency energy transfer device with localization and polarization tracking of claim 9, wherein the reflected wave source is a second harmonic of the electromagnetic wave source.

11. The radio frequency energy transmission device with positioning and polarization tracking of claim 9, wherein the first adjusting unit comprises a first adjusting path and a second adjusting path, the first adjusting path and the second adjusting path adjust the amplitude of the second signal to be the first signal according to the first adjusting signal; or after the amplitude of the power signal source is adjusted according to the first adjusting signal, the phase is switched to the first signal.

12. The radio frequency energy transfer device with location and polarization tracking of claim 11, wherein the antenna array comprises a plurality of polarized antennas, and the polarized antennas comprise:

wherein a first adjustment voltage of the first signal changes the direction and polarization angle of the electromagnetic wave source transmitted by the vertically polarized antenna; a second adjustment voltage of the first signal changes the direction and polarization angle of the horizontal polarization antenna for transmitting the electromagnetic wave source.

13. The rf energy transmission device with location and polarization tracking of claim 9, wherein the radar control module comprises:

a receiving antenna for receiving the reflected wave source;

a power detection unit electrically connected to the receiving antenna;

the first control unit is electrically connected between the power detection unit and the first adjusting unit; and

the second control unit is electrically connected between the power detection unit and the second adjusting unit;

after the power detection unit judges the power of the reflected wave source, a first control signal is output to the first control unit, and a second control signal is output to the second control unit; the first control unit adjusts the first adjusting unit according to the first control signal, and the second control unit adjusts the second adjusting unit according to the second control signal.

14. The rf energy transmission device with location and polarization tracking of claim 13, wherein the second control unit comprises:

a position determination unit electrically connected to the power detection unit;

a phase delay control unit electrically connected between the position determination unit and the second adjustment unit;

the position judging unit judges the position of the radio frequency energy hunting device according to the second control signal and outputs position information to the phase delay control unit; the phase delay control unit adjusts the second adjusting signal according to the position information.

15. The rf energy transmission device with positioning and polarization tracking of claim 14, wherein the power detection unit further comprises a parameter storage unit, wherein the parameter storage unit stores a setting parameter of the antenna array when the rf energy transmission device outputs the maximum power.

16. The rf energy transmitting device with positioning and polarization tracking of claim 15, wherein the setting parameters at least include the direction of the antenna array and the control parameter of the predetermined angle, and the control parameter of the predetermined angle is the polarization angle at which the rf energy transmitting device outputs the maximum power.

17. The rf energy transmission device with localization and polarization tracking of claim 9, wherein the rf energy transmission device further comprises:

the communication unit is electrically connected with the radar control module;

18. A radio frequency energy hunting device is applied to a radio frequency energy transmission device with polarization tracking or positioning and polarization tracking, wherein the radio frequency energy hunting device comprises:

the wave source transceiver module receives an electromagnetic wave source and emits a reflected wave source;

the power module is electrically connected with the wave source transceiver module;

a resonance unit electrically connected to the wave source transceiver module;

after receiving the electromagnetic wave source, the wave source transceiver module outputs an alternating current source to the power module and generates a reflection signal to the resonance unit; the resonance unit enhances the signal intensity of the reflected signal to be the reflected wave source and outputs the reflected wave source to the wave source transceiver module; after receiving the reflected wave source, the wave source transceiver module transmits the reflected wave source to the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking so as to adjust the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device to accord with a preset angle.

19. The radio frequency energy hunting device according to claim 18, wherein the wave source transceiver module comprises:

a receiving and transmitting antenna for receiving the electromagnetic wave source and transmitting the reflected wave source;

a circulator unit electrically connected between the transmitting and receiving antenna and the resonance unit;

a matching unit electrically connected between the circulator unit and the resonance unit;

when the receiving and transmitting antenna receives the electromagnetic wave source, the electromagnetic wave source is output to the matching unit through the circulator unit; after receiving the electromagnetic wave source, the matching unit outputs the alternating current source to the power module and outputs the reflection signal to the resonance unit; when the resonance unit enhances the signal intensity of the reflected signal to be the reflected wave source, the signal is output to the wave source transceiver module through the circulator unit, and the harmonic wave is radiated out through the wave source transceiver module to form the reflected wave source.

20. The radio frequency energy hunting device according to claim 18, wherein the reflected wave source is a second harmonic of the electromagnetic wave source.

21. The radio frequency energy hunting device according to claim 19, wherein the radio frequency energy hunting device further comprises:

a switch unit electrically connected between the matching unit and the resonance unit;

the energy storage unit is electrically connected with the power module and the switch unit;

when the matching unit receives the electromagnetic wave source, the switch unit is switched on, the matching unit outputs the reflection signal to the resonance unit, the power module outputs a direct current to charge the energy storage unit, and the power module generates bias voltage to gradually close the switch unit so as to gradually close the electrical connection between the resonance unit and the matching unit; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, the energy storage unit is charged to close the switch unit so as to close the electrical connection between the resonance unit and the matching unit.

22. The radio frequency energy hunting device of claim 21, wherein the power module comprises:

the rectifying unit is electrically connected between the matching unit and the energy storage unit;

a processing unit electrically connected to the rectifying unit;

when the rectifying unit receives the alternating current source, the rectifying unit converts the alternating current source into a direct current source and charges the energy storage unit; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, the rectifying unit supplies the direct current source to the processing unit.

23. A radio frequency energy hunting device is applied to a radio frequency energy transmission device with polarization tracking or positioning and polarization tracking, wherein the radio frequency energy hunting device comprises:

a resonance unit electrically connected with the wave source transceiver module and the power module;

after receiving the electromagnetic wave source, the wave source transceiver module outputs an alternating current source to the power module, and the power module generates a reflection signal to the resonance unit; the resonance unit enhances the signal intensity of the reflected signal to be the reflected wave source and outputs the reflected wave source to the wave source transceiver module; after receiving the reflected wave source, the wave source transceiver module transmits the reflected wave source to the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking so as to adjust the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device to accord with a preset angle.

24. The radio frequency energy hunting device of claim 23, wherein the wave source transceiver module comprises:

a matching unit electrically connected to the circulator unit;

when the receiving and transmitting antenna receives the electromagnetic wave source, the electromagnetic wave source is output to the matching unit through the circulator unit; after the matching unit receives the electromagnetic wave source, the alternating current source is output to the power module, and the power module outputs the reflection signal to the resonance unit; when the resonance unit enhances the signal intensity of the reflected signal to be the reflected wave source, the signal is output to the wave source transceiver module through the circulator unit, and the harmonic wave is radiated out through the wave source transceiver module to form the reflected wave source.

25. The radio frequency energy hunting device according to claim 23, wherein the reflected wave source is a second harmonic of the electromagnetic wave source.

26. The radio frequency energy hunting device according to claim 24, wherein the radio frequency energy hunting device further comprises:

the switch unit is electrically connected between the power module and the resonance unit and receives a reference voltage;

the energy storage unit is electrically connected with the power module;

when the matching unit receives the electromagnetic wave source, the switch unit is switched on, the power module outputs the reflection signal to the resonance unit, the power module outputs a direct current source to charge the energy storage unit, and the reference voltage gradually closes the electrical connection between the resonance unit and the power module; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, the reference voltage closes the switch unit so as to close the electrical connection between the resonance unit and the power module.

27. The radio frequency energy hunting device of claim 26, wherein the power module comprises:

the rectifying unit is electrically connected among the matching unit, the switch unit and the energy storage unit;

a processing unit electrically connected to the rectifying unit;

when the rectifying unit receives the alternating current source, the rectifying unit converts the alternating current source into the direct current source, outputs the reflection signal to the resonance unit and outputs the direct current source to charge the energy storage unit; and when the polarization angle of the radio frequency energy transmission device with polarization tracking or positioning and polarization tracking and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, the switch unit closes the electrical connection between the resonance unit and the rectification unit, and the rectification unit supplies the direct current source to the processing unit.

28. A radio frequency energy transmission method with polarization tracking comprises the following steps:

(a) emitting an electromagnetic wave source;

(b) receiving a reflected wave source emitted by a radio frequency energy hunting device, wherein the frequency of the electromagnetic wave source is different from that of the reflected wave source;

(c) adjusting the polarization angle of a polarized antenna for transmitting the electromagnetic wave source;

(d) judging whether the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle or not;

if the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, recording a set parameter which accords with the preset angle so as to provide the correct polarization direction of the polarized antenna.

29. The method according to claim 28, wherein if the polarization angle of the polarized antenna and the polarization angle of the reflected wave source of the rf energy-hunting device are not within the predetermined angle, the method returns to step (c).

30. The method of claim 28, wherein the reflected wave source is a second harmonic of the electromagnetic wave source.

31. The method for transmitting radio frequency energy with polarization tracking according to claim 28, wherein the polarized antenna comprises a vertically polarized antenna and a horizontally polarized antenna, the step (c) further comprising the sub-steps of:

(c1) adjusting a first adjustment voltage to change the amplitude or amplitude and phase of the vertically polarized antenna, thereby adjusting the polarization angle of the vertically polarized antenna;

(c2) adjusting a second adjustment voltage to change the amplitude or amplitude and phase of the horizontally polarized antenna, thereby adjusting the polarization angle of the horizontally polarized antenna.

32. The method according to claim 28, wherein the setting parameters at least include a control parameter of the predetermined angle, and the control parameter of the predetermined angle is a polarization angle at which the rf energy-hunting device outputs maximum power.

33. A radio frequency energy transmission method with positioning and polarization tracking includes the following steps:

(a) emitting an electromagnetic wave source to scan a space;

(c) adjusting the direction of an antenna array for transmitting the electromagnetic wave source to face the radio frequency energy hunting device;

(d) adjusting the polarization angle of the antenna array;

(e) judging whether the polarization angle of the antenna array and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with a preset angle or not;

if the polarization angle of the antenna array and the polarization angle of the reflected wave source of the radio frequency energy hunting device accord with the preset angle, recording a set parameter which accords with the preset angle so as to provide a correct polarization direction of a polarized antenna.

34. The method according to claim 33, wherein if the polarization angle of the antenna array and the polarization angle of the reflected wave source of the rf energy-hunting device are not within the predetermined angle, the method returns to step (d).

35. The method of claim 33, wherein the reflected wave source is a second harmonic of the electromagnetic wave source.

36. The method for radio frequency energy transfer with location and polarization tracking of claim 33 wherein the antenna array comprises a plurality of polarized antennas, and each polarized antenna comprises a vertically polarized antenna and a horizontally polarized antenna, the step (d) further comprising the sub-steps of:

(d1) adjusting a first adjusting voltage to change the amplitude or amplitude and phase of the vertically polarized antennas, so as to adjust the polarization angles of the vertically polarized antennas;

(d2) adjusting a second adjustment voltage to change the amplitude or amplitude and phase of the horizontally polarized antennas, thereby adjusting the polarization angle of the horizontally polarized antennas.

37. The method according to claim 33, wherein the setting parameters at least include a direction of the electromagnetic wave emitted from the antenna array and a control parameter of the predetermined angle, and the control parameter of the predetermined angle is a polarization angle at which the rf energy-hunting device outputs maximum power.