CN117559672B - Microwave wireless energy transmission device for omnidirectional local area network - Google Patents
Microwave wireless energy transmission device for omnidirectional local area network Download PDFInfo
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Abstract
The invention relates to the technical field of mobile equipment charging, and discloses an omnidirectional local area network microwave wireless energy transmission device, which comprises a microwave signal transmitter and a plurality of microwave signal receivers; the microwave signal transmitter comprises a sine wave generator, an analog 360-degree linear phase shifter and a triangular wave generator, wherein the sine wave generator is connected with the analog 360-degree linear phase shifter, the sine wave generator is sequentially connected with a first class-A-B power amplifier and an antenna unit oscillator I, and the analog 360-degree linear phase shifter is sequentially connected with a second class-A-B power amplifier and an antenna unit oscillator II; the analog 360-degree linear phase shifter is connected with the triangular wave generator; the microwave signal receiver comprises a double-resonance coupling circuit, a full-wave rectifying circuit and a power management module which are sequentially connected, wherein the double-resonance coupling circuit is connected with a receiving antenna oscillator. The invention can realize omnidirectional microwave energy transmission, thereby carrying out uninterrupted charging on the mobile terminal.
Description
Technical Field
The invention relates to the technical field of mobile equipment charging, in particular to an omnidirectional local area network microwave wireless energy transmission device.
Background
In the technical background of the increasing popularity of mobile devices, people have an increasing dependence on mobile devices. However, the deadly weakness of the mobile device is that the battery is used for a short time, and particularly in a continuous working state, the electric quantity of the battery is quickly exhausted, and the battery must be charged timely so as not to influence the normal operation of the mobile device, and in the situation of information transient, immeasurable loss is caused by a temporary interruption. Even for entertainment projects, the user's experience is affected. Limited to the portable use of the mobile device, the battery volume or capacity cannot be made large. The current unavoidable solution is to plug in the mobile device. There are then two major pain points: firstly, the plugging use has great potential safety hazard, and the charging head and the data wire can lead to electrification of the mobile equipment or cause deflagration; another is that plug-in uses mobile inconvenience, losing the original attributes of the mobile device.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an omnidirectional lan microwave wireless energy transmission device, which establishes a local wireless energy transmission network, radiates electromagnetic waves through a microwave antenna, and has a radiation directivity capable of scanning reciprocally at 360 °, and a receiver within a microwave radiation range, which can receive electromagnetic waves in any direction and convert the electromagnetic waves into dc energy for output, and continuously charges mobile devices, so as to solve the above-mentioned problems in the background art.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an omnidirectional local area network microwave wireless energy transmission device comprises a microwave signal transmitter and a plurality of microwave signal receivers; the microwave signal transmitter comprises a sine wave generator, an analog 360-degree linear phase shifter and a triangular wave generator, wherein the sine wave generator is connected with the analog 360-degree linear phase shifter, the sine wave generator is sequentially connected with a first class-A-B power amplifier and an antenna unit oscillator I, and the analog 360-degree linear phase shifter is sequentially connected with a second class-A-B power amplifier and an antenna unit oscillator II; the analog 360-degree linear phase shifter is connected with the triangular wave generator; the microwave signal receiver comprises a double-resonance coupling circuit, a full-wave rectifying circuit and a power management module which are sequentially connected, wherein the double-resonance coupling circuit is connected with a receiving antenna oscillator.
Further, the double-resonance coupling circuit comprises two resonance circuits, wherein one resonance circuit comprises a capacitor C1 and a primary coil L1 of a coupling transformer, the capacitor C1 is connected with the primary coil L1 of the coupling transformer in parallel, one end of the capacitor C1 is connected with an antenna ANT1, the other resonance circuit comprises a capacitor C2 and a primary coil L2 of the coupling transformer, the capacitor C2 is connected with the primary coil L2 of the coupling transformer in parallel, and one end of the capacitor C2 is connected with the antenna ANT2; the frequencies of the two resonant tanks are close.
Further, the full-wave rectifying circuit comprises a diode D1, a diode D2, a secondary coil L3 of the coupling transformer and a capacitor C3, wherein anodes of the diode D1 and the diode D2 are respectively connected to two ends of the secondary coil L3 of the coupling transformer, cathodes of the diode D1 and the diode D2 are connected to one end of the capacitor C3, and the other end of the capacitor C3 is connected to the middle end of the secondary coil L3 of the coupling transformer.
Further, the first class-A power amplifier and the second class-A power amplifier are identical, and the transistors and the matching circuit adopted by the first class-A power amplifier and the second class-A power amplifier are identical.
Further, the first class-A and class-B power amplifier comprises a capacitor C4, a resistor R1, an inductor L4, an inductor L5, a capacitor C5 and a transistor T1; one end of the inductor L5, one end of the resistor R1 and one end of the capacitor C5 are respectively connected to the power supply Vc, the other end of the inductor L5 and the other end of the capacitor C5 are respectively connected to the collector of the transistor T1, the other end of the resistor R1 is connected with one end of the inductor L4, and the other end of the inductor L4 is connected with the base electrode of the transistor T1; one end of the capacitor C4 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T1, and the collector electrode of the transistor T1 is connected to the antenna unit oscillator I; the emitter of the transistor T1 is grounded.
Further, the second class ab power amplifier includes a capacitor C7, a resistor R2, an inductor L6, an inductor L7, a capacitor C6, and a transistor T2; one end of the inductor L7, one end of the resistor R2 and one end of the capacitor C6 are respectively connected to the power supply Vc, the other end of the inductor L7 and the other end of the capacitor C6 are respectively connected to the collector of the transistor T2, the other end of the resistor R2 is connected with one end of the inductor L6, and the other end of the inductor L6 is connected with the base of the transistor T2; one end of the capacitor C7 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T2, and the collector electrode of the transistor T2 is connected to the antenna unit oscillator II; the emitter of the transistor T2 is grounded.
Advantageous effects
Compared with the prior art, the invention at least comprises the following advantages: the triangular wave signal controls the analog 360-degree linear phase shifter, so that the phase difference between the phased dual-element antennas is changed in a 360-degree reciprocating manner, thereby forming a transmitting power lobe of 360-degree reciprocating scanning, and electromagnetic waves can be radiated to the periphery. The microwave receiver converts the received microwave signals into direct current levels through frequency selection, rectification and filtering, and then outputs the direct current levels to the mobile terminal through the power management module for uninterrupted charging, so that the problem that the mobile device needs to be charged by plugging in is solved.
Drawings
Fig. 1 is a plan layout block diagram of an omnidirectional lan microwave wireless energy transmission device of the present invention.
Fig. 2 is a block diagram of a microwave signal transmitter in accordance with the present invention.
Fig. 3 is a block diagram of a microwave signal receiver according to the present invention.
Fig. 4 is a schematic diagram of the operation of the microwave signal receiver of the present invention.
Fig. 5 is a schematic diagram of the operation of the microwave signal transmitter of the present invention.
Fig. 6 is a graph of a simulated 360 linear phase shifter characteristic of the present invention.
Fig. 7 is a characteristic curve of the triangular wave generator of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and the detailed description. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-7, the present embodiment provides an omnidirectional local area network microwave wireless energy transmission device, which includes a microwave signal transmitter and a plurality of microwave signal receivers.
In the technical scheme of the embodiment, the microwave signal receiver comprises a double-resonance coupling circuit, a full-wave rectifying circuit and a power management module which are sequentially connected, wherein the double-resonance coupling circuit is connected with a receiving antenna oscillator. The double-resonance coupling circuit comprises two resonance circuits, wherein one resonance circuit comprises a capacitor C1 and a primary coil L1 of a coupling transformer, the capacitor C1 is connected with the primary coil L1 of the coupling transformer in parallel, one end of the capacitor C1 is connected with an antenna ANT1, the other resonance circuit comprises a capacitor C2 and a primary coil L2 of the coupling transformer, the capacitor C2 is connected with the primary coil L2 of the coupling transformer in parallel, and one end of the capacitor C2 is connected with an antenna ATN2. The resonant frequencies of the two resonant circuits are f1 and f2 respectively, and the f1 and f2 are close in frequency. The resonance peaks of the two resonance loops overlap to form a single resonance peak with a certain bandwidth, thereby effectively avoiding the influence caused by the emission frequency drift of the microwave signal emitter. The full-wave rectification circuit comprises a diode D1, a diode D2, a secondary coil L3 of the coupling transformer and a capacitor C3, wherein anodes of the diode D1 and the diode D2 are respectively connected to two ends of the secondary coil L3 of the coupling transformer, cathodes of the diode D1 and the diode D2 are connected and connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected to the middle end of the secondary coil L3 of the coupling transformer. The primary coil L1 of the coupling transformer, the primary coil L2 of the coupling transformer and the secondary coil L3 of the coupling transformer share one magnetic core, and the two resonant circuits couple resonant signals to the secondary coil L3 of the coupling transformer through the shared magnetic core. The full-wave rectifying circuit formed by the diode D1, the diode D2, the secondary coil L3 of the coupling transformer and the capacitor C3 converts received electromagnetic waves into direct current and feeds the direct current to the power management module, and finally the direct current signal is converted into direct current signal output to charge the mobile equipment.
In this embodiment, the power management module is a standard commercial module, and functions to process the dc voltage output from the full-wave rectifying circuit, such as overvoltage, undervoltage, ripple, burr, overload, and short circuit. The direct-current voltage processed by the power management module can safely charge the mobile equipment.
In the technical scheme of the embodiment, the microwave signal transmitter comprises a sine wave generator, an analog 360-degree linear phase shifter and a triangular wave generator, wherein the sine wave generator is connected with the analog 360-degree linear phase shifter, the sine wave generator is sequentially connected with a first class-A and class-B power amplifier and an antenna unit oscillator I, and the analog 360-degree linear phase shifter is sequentially connected with a second class-A and class-B power amplifier and an antenna unit oscillator II; the analog 360-degree linear phase shifter is connected with the triangular wave generator. The antenna unit oscillator I and the antenna unit oscillator II form a phase control dual-oscillator antenna.
The first class-A power amplifier comprises a capacitor C4, a resistor R1, an inductor L4, an inductor L5, a capacitor C5 and a transistor T1; one end of the inductor L5, one end of the resistor R1 and one end of the capacitor C5 are respectively connected to a power supply Vc, the other end of the inductor L5 and the other end of the capacitor C5 are connected to a collector of the transistor T1, the other end of the resistor R1 is connected with one end of the inductor L4, and the other end of the inductor L4 is connected with a base electrode of the transistor T1; one end of the capacitor C4 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T1, and the collector electrode of the transistor T1 is connected to the antenna unit oscillator I; the emitter of the transistor T1 is grounded. R1 and L4 provide bias base current for the transistor T1, so that the transistor T1 works in class A and class B amplifying state, thereby improving the emission power of the transistor. L5 and C5 form a frequency-selective resonant circuit, the resonant frequency of the frequency-selective resonant circuit is f0, and f0= (f1+f2)/2, wherein f1 and f2 are the resonant frequencies of two resonant circuits in the double-resonant coupling circuit respectively. The microwave signal generated by the sine wave generator is fed into the first class A and class B power amplifier through the coupling capacitor C4, and is fed into the first antenna unit oscillator after frequency selection and amplification, so that the microwave transmitting function is realized.
The second class-A power amplifier comprises a capacitor C7, a resistor R2, an inductor L6, an inductor L7, a capacitor C6 and a transistor T2; one end of the inductor L7, one end of the resistor R2 and one end of the capacitor C6 are respectively connected to a power supply Vc, the other end of the inductor L7 and the other end of the capacitor C6 are connected to a collector of the transistor T2, the other end of the resistor R2 is connected with one end of the inductor L6, and the other end of the inductor L6 is connected with a base electrode of the transistor T2; one end of the capacitor C7 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T2, and the collector electrode of the transistor T2 is connected to the antenna unit oscillator II; the emitter of the transistor T2 is grounded. In the technical scheme of the invention, the first class-A power amplifier and the second class-A power amplifier are identical, specifically, the transistor T1 is identical to the transistor T2, the matching circuits of the transistor T1 and the transistor T2 are identical, wherein the capacitor C7 and the capacitor C4 are identical in value, the resistor R2 and the resistor R1 are identical in value, the inductor L6 and the inductor L4 are identical in value, the inductor L7 and the inductor L5 are identical in value, and the capacitor C6 and the capacitor C5 are identical in value.
In the technical scheme of the embodiment, a triangular wave generator controls and simulates a 360-degree linear phase shifter to carry out 360-degree reciprocating phase shifting scanning. Specifically, the output voltage of the triangular wave generator increases linearly to the peak and decreases linearly to zero, so that the phase of the analog 360 ° linear phase shifter changes from 0 ° to 360 °, and then changes from 360 ° to 0 °. The characteristic curve of the simulated 360-degree linear phase shifter is shown in fig. 6, and the characteristic curve of the triangular wave generator is shown in fig. 7.
In the implementation process, the sine wave generator generates a microwave signal and is divided into two paths for synchronous output. One path of the microwave signals is output to a first class A and class B power amplifier, and after power amplification, the microwave signals are output to the first antenna unit oscillator, and the first antenna unit oscillator radiates the microwave signals. The other path of microwave signal generated by the sine wave generator is output to the analog 360-degree linear phase shifter, the analog 360-degree linear phase shifter reciprocates 360-degree phase shifting of the microwave signal under the control of the triangular wave generator, the microwave signal subjected to reciprocating phase shifting is input to the second class A power amplifier for power amplification and is output to the antenna unit oscillator II, and the antenna unit oscillator II radiates the microwave signal subjected to reciprocating phase shifting.
The first class ab power amplifier and the second class ab power amplifier are identical. The first class-A and class-B power amplifier inputs microwave signals with fixed phases, and the second class-A and class-B power amplifier inputs microwave signals with 360-degree reciprocating phase shifting. Thus, the phase angle between the first antenna element and the second antenna element can be reciprocally changed between 0-360 degrees, the synthesized radiation power lobe can be omnidirectionally scanned by 0-360 degrees, namely, the synthesized radiation power main lobe is turned from 0 degrees to 360 degrees and then turned from 360 degrees back to 0 degrees, and the cyclic reciprocation is performed, so that the microwave signal transmitter can radiate microwave signals to the periphery.
In the effective range covered by the microwave signals, the receiving antenna elements, namely the antenna ATN1 and the antenna ATN2, feed the received microwave signals into the double-resonant coupling circuit for frequency selection, and the double-resonant coupling circuit is adopted to ensure the receiving frequency band to be slightly wider, ensure the reliability of the received microwave signals, and not influence the receiving effect even if the transmitting frequency of the microwave signals deviates. The double-resonance coupling circuit feeds the received microwave signals into the rectifying and filtering circuit module for rectifying and filtering treatment, and outputs direct current signals for charging of the mobile equipment after the treatment of the power management module.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. The omnidirectional local area network microwave wireless energy transmission device is characterized by comprising a microwave signal transmitter and a plurality of microwave signal receivers; the microwave signal transmitter comprises a sine wave generator, an analog 360-degree linear phase shifter and a triangular wave generator, wherein the sine wave generator is connected with the analog 360-degree linear phase shifter, the sine wave generator is sequentially connected with a first class-A-B power amplifier and an antenna unit oscillator I, and the analog 360-degree linear phase shifter is sequentially connected with a second class-A-B power amplifier and an antenna unit oscillator II; the analog 360-degree linear phase shifter is connected with the triangular wave generator; the microwave signal receiver comprises a double-resonance coupling circuit, a full-wave rectifying circuit and a power management module which are sequentially connected, wherein the double-resonance coupling circuit is connected with a receiving antenna oscillator;
the double-resonance coupling circuit comprises two resonance circuits, wherein one resonance circuit comprises a capacitor C1 and a primary coil L1 of a coupling transformer, the capacitor C1 is connected with the primary coil L1 of the coupling transformer in parallel, one end of the capacitor C1 is connected with an antenna ANT1, the other resonance circuit comprises a capacitor C2 and a primary coil L2 of the coupling transformer, the capacitor C2 is connected with the primary coil L2 of the coupling transformer in parallel, and one end of the capacitor C2 is connected with the antenna ANT2; the frequencies of the two resonant circuits are close, so that the resonant peaks of the two resonant circuits overlap to form a single resonant peak with a certain bandwidth, thereby effectively avoiding the influence caused by the emission frequency drift of the microwave signal emitter;
the first class-A power amplifier and the second class-B power amplifier are identical, and the transistors adopted by the first class-A power amplifier and the second class-A power amplifier are identical to each other;
the first class-A power amplifier comprises a capacitor C4, a resistor R1, an inductor L4, an inductor L5, a capacitor C5 and a transistor T1; one end of the inductor L5, one end of the resistor R1 and one end of the capacitor C5 are respectively connected to the power supply Vc, the other end of the inductor L5 and the other end of the capacitor C5 are respectively connected to the collector of the transistor T1, the other end of the resistor R1 is connected with one end of the inductor L4, and the other end of the inductor L4 is connected with the base electrode of the transistor T1; one end of the capacitor C4 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T1, and the collector electrode of the transistor T1 is connected to the antenna unit oscillator I; the emitter of the transistor T1 is grounded;
the second class-A power amplifier comprises a capacitor C7, a resistor R2, an inductor L6, an inductor L7, a capacitor C6 and a transistor T2; one end of the inductor L7, one end of the resistor R2 and one end of the capacitor C6 are respectively connected to the power supply Vc, the other end of the inductor L7 and the other end of the capacitor C6 are respectively connected to the collector of the transistor T2, the other end of the resistor R2 is connected with one end of the inductor L6, and the other end of the inductor L6 is connected with the base of the transistor T2; one end of the capacitor C7 is connected with a microwave signal, the other end of the capacitor C is connected to the base electrode of the transistor T2, and the collector electrode of the transistor T2 is connected to the antenna unit oscillator II; the emitter of the transistor T2 is grounded.
2. The omnidirectional local area network microwave wireless energy transmission device according to claim 1, wherein the full-wave rectifying circuit comprises a diode D1, a diode D2, a secondary coil L3 of a coupling transformer and a capacitor C3, anodes of the diode D1 and the diode D2 are respectively connected to two ends of the secondary coil L3 of the coupling transformer, cathodes of the diode D1 and the diode D2 are connected to one end of the capacitor C3, and the other end of the capacitor C3 is connected to a middle end of the secondary coil L3 of the coupling transformer.
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