KR101704288B1 - Magnetic field apparatus for using espar and method for operating magnetic field apparatus for using espar - Google Patents

Magnetic field apparatus for using espar and method for operating magnetic field apparatus for using espar Download PDF

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Publication number
KR101704288B1
KR101704288B1 KR1020150161760A KR20150161760A KR101704288B1 KR 101704288 B1 KR101704288 B1 KR 101704288B1 KR 1020150161760 A KR1020150161760 A KR 1020150161760A KR 20150161760 A KR20150161760 A KR 20150161760A KR 101704288 B1 KR101704288 B1 KR 101704288B1
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KR
South Korea
Prior art keywords
magnetic field
parasitic
loop antenna
espar
magnetic
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Application number
KR1020150161760A
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Korean (ko)
Inventor
최지웅
김한준
최홍수
Original Assignee
재단법인대구경북과학기술원
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Priority to KR1020150161760A priority Critical patent/KR101704288B1/en
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Publication of KR101704288B1 publication Critical patent/KR101704288B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H02J7/025—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H04B5/0025—Near field system adaptations

Abstract

Disclosed are a magnetic field apparatus using ESPAR and an operating method thereof. The magnetic field apparatus using ESPAR includes a source loop antenna which is composed of a single unit and outputs a magnetic field, and a plurality of parasitic loop antennas which are combined with the source loop antenna with an array shape and output a plurality of parasitic magnetic fields. The parasitic loop antenna determines a magnetic field focusing point by changing the phases of the plurality of parasitic magnetic fields. Accordingly, the present invention can improve focusing performance of a transmission magnetic field by controlling at least one of an angle and a direction of the transmission magnetic field.

Description

TECHNICAL FIELD [0001] The present invention relates to a magnetic field apparatus using an ESPAR and a method of operating a magnetic field apparatus using the ESPAR,

An embodiment of the present invention is an array of a plurality of parasitic loop antennas and a source loop antenna having one RF chain. The phase of the parasitic loop antenna is changed to provide a focusing point of a magnetic field The present invention relates to a magnetic field apparatus using an ESPAR (Electrically Steerable Passive Array Radiator) and a method of operating a magnetic field apparatus using ESPAR, which realizes a higher efficiency and a far distance in a low complexity system in power and data transmission.

Magnetic field-based power transmission and communication systems continue to be increasingly needed as wireless power transmission and RF communication in everyday life are exploited in situations where it is difficult (e.g., underground, underwater, human, etc.) .

However, due to the short transmission range which is the physical limit of the magnetic field, commercialization and research on such a system is stagnant.

In a conventional magnetic field-based power transmission and communication system, in order to implement a focusing technique for a magnetic field, including a plurality of RF chains increases the volume of the entire system, increases the complexity in terms of hardware, .

In addition, since such a system needs to calculate an appropriate phase for each magnetic field in consideration of all magnetic field components generated from a plurality of power sources, the complexity also increases in terms of software.

As a countermeasure to this, ESPAR and parasitic loop antenna are used to obtain the effect of existing RF chain by using only a single RF chain, and it is advantageous to obtain a high gain as the coupling between antennas becomes strong have.

The source loop antenna has a relatively strong coupling structure and is suitable for ESPAR application. However, in the past, beam-shaping technique has been mainly applied in far-field.

Therefore, it is required to develop a technique capable of achieving high performance with low complexity and cost by applying ESPAR to near-field magnetic field communication and power transmission using a source loop antenna.

The embodiment of the present invention is intended to improve the focusing performance for the outgoing magnetic field by adjusting at least one of the angle or direction of the outgoing magnetic field emitted from the source loop antenna by changing the phase of the plurality of parasitic magnetic fields .

Also, embodiments of the present invention aim to reduce the complexity of the process for the overall volume and phase control of the magnetic field, as compared to a device comprising a plurality of RF chains, by including a single RF chain.

A magnetic field apparatus using ESPAR according to an embodiment of the present invention includes a source loop antenna configured to output a magnetic field in a single unit and a plurality of parasitic magnetic fields coupled in an array form with the source loop antenna, Wherein the parasitic loop antenna changes a phase of the plurality of parasitic magnetic fields so as to determine a point at which the magnetic field is focused.

A method of operating a magnetic field apparatus using an ESPAR according to an embodiment of the present invention includes the steps of: constructing a single source loop antenna for outputting a magnetic field; combining a plurality of parasitic magnetic fields Constructing a parasitic loop antenna of the parasitic loop antenna, and changing the phase of the plurality of parasitic magnetic fields in the parasitic loop antenna so as to determine a point at which the magnetic field is focused.

According to the embodiment of the present invention, by adjusting the phase of a plurality of parasitic magnetic fields, by adjusting at least one of the angle or direction of the outgoing magnetic field emitted from the source loop antenna, the focusing performance for the outgoing magnetic field is improved, .

Further, according to embodiments of the present invention, by including a single RF chain, the complexity of the process for the overall volume and phase control of the magnetic field can be reduced and the cost can be reduced as compared to a device including a plurality of RF chains .

1 is a diagram illustrating a configuration of a network including a magnetic field apparatus using ESPAR according to an embodiment of the present invention.
2 is a diagram illustrating a configuration of a magnetic field apparatus using ESPAR according to an embodiment of the present invention.
3 is a diagram illustrating an example of the configuration of a magnetic field apparatus using ESPAR according to an embodiment of the present invention.
4 is a flowchart illustrating a method of operating a magnetic field apparatus using ESPAR according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

1 is a diagram illustrating a configuration of a network including a magnetic field apparatus using ESPAR according to an embodiment of the present invention.

Referring to FIG. 1, a network 100 including a magnetic field device using ESPAR may include a magnetic field device 101 and a relative magnetic field device 103 using ESPAR. Here, the magnetic field apparatus 101 using the ESPAR and the counterpart magnetic field apparatus 103 can transmit and receive magnetic fields and communicate with each other.

The magnetic field device 101 using ESPAR may comprise a single RF chain and each of the phases for a plurality of parasitic magnetic fields arising from a magnetic field associated with a single RF chain may be altered such that the magnetic field and the plurality of parasitic fields For example, to a point where the relative magnetic field apparatus 103 is located.

The magnetic field apparatus 101 using the ESPAR can concentrate the magnetic fields and improve the focusing performance for the magnetic field to be transmitted, thereby expanding the transmission range for the emitted magnetic field and increasing the transmission efficiency.

The relative magnetic field device 103 can receive a magnetic field with improved focusing performance from the magnetic field device 101 using ESPAR.

Relative magnetic field device 103 may also implement ESPAR to deliver a magnetic field with improved focusing performance, but is not limited thereto.

2 is a diagram illustrating a configuration of a magnetic field apparatus using ESPAR according to an embodiment of the present invention.

2, a magnetic field device 200 using an ESPAR (Electrically Steerable Passive Array Radiator) according to an embodiment of the present invention may include a source loop antenna 210 and a parasitic loop antenna 220 .

First, the source loop antenna 210 may be a unit configured to output a magnetic field. The source loop antenna 210 may be formed of a wire that is wound several times in a circular shape, and has a relatively large critical directionality. Accordingly, the source loop antenna 210 can be mainly used for a radio direction detection device and the like. The source loop antenna 210 may include a power source (not shown).

The parasitic loop antenna 220 may be arranged in an array form with the source loop antenna 210, and may be a plurality of means for outputting a plurality of parasitic magnetic fields. The parasitic magnetic field output from the parasitic loop antenna 220 can interfere with the magnetic field output to the source loop antenna 210 and change the directionality of the magnetic field.

Particularly, the parasitic loop antenna 220 can change the phase of the plurality of parasitic magnetic fields to induce a desired point to determine a point at which the magnetic field is focused.

Each of the plurality of parasitic loop antennas 220 may be configured to have a predetermined spacing distance with respect to the source loop antenna 210 and be radially positioned in different directions from each other.

The source loop antenna 210 includes a radio frequency chain 211 and a processor 213 and may be configured to be connected to the transmission / reception unit 215.

The RF chain 211 can generate a magnetic field corresponding to the input signal.

The processor 213 generates the magnetic field as a sending magnetic field in accordance with the interference of the plurality of parasitic magnetic fields whose phases are changed and sends the generated sending magnetic field to the external magnetic field device through the transmitting / have. Here, the outgoing magnetic field may refer to a magnetic field resulting from the change in the direction of the magnetic field output from the source loop antenna due to the phase change of the plurality of parasitic magnetic fields.

On the other hand, the processor 213 uses the phase changing unit 305 (FIG. 3) to determine the magnitude of the phase of the plurality of parasitic magnetic fields to change, and adjusts at least one of the angle or direction, And determine the point to be focused.

In determining the magnitude in which the phase changes, the processor 213 may determine the magnitude of the phase change with respect to the plurality of parasitic magnetic fields according to the target angle or the target direction.

For example, the processor 213 may determine the respective set values for the plurality of parasitic magnetic fields differently in accordance with the target angle or target direction associated with the relative magnetic field apparatus, and determine a magnitude So that the outgoing magnetic field of the aggregated form can be transmitted to a specific point where the relative magnetic field apparatus is located.

The transmitting / receiving unit 215 can transmit the generated sending magnetic field by the processor 213. [

Accordingly, the magnetic field apparatus using the ESPAR improves the focusing performance with respect to the outgoing magnetic field by adjusting at least one of the angle or direction of the outgoing magnetic field transmitted through the transceiver unit by changing the phase of the plurality of parasitic magnetic fields, The range can be extended.

Further, by using a magnetic field device using ESPAR, by including a single RF chain, compared to a device including a plurality of RF chains, it is possible to reduce the complexity of the process for the overall volume and the phase control of the magnetic field, have.

3 is a diagram illustrating an example of the configuration of a magnetic field apparatus using ESPAR according to an embodiment of the present invention.

In Fig. 3A, the arrangement of the loops is arranged close to the area of the magnetic field of the source loop antenna, and Fig. 3B shows the arrangement of the loops superimposed.

Referring to FIGS. 3A and 3B, the magnetic field apparatus 300 using ESPAR may include a source loop antenna 303-1 and a parasitic loop antenna 303-2. The source loop antenna 303-1 may include an RF chain 301 and a phase changing unit 305. [

The source loop antenna 303-1 can be configured as a single unit and output a magnetic field.

The parasitic loop antenna 303-2 is coupled to the source loop antenna 303-1 in an array form and can be configured as a plurality of parasitic magnetic fields.

This parasitic loop antenna 303-2 may change the phase of the plurality of parasitic magnetic fields so as to determine a point at which the magnetic field is focused.

The RF chain 301 can generate a magnetic field corresponding to the input signal.

The source loop antenna 303-1 can generate the magnetic field as a sending magnetic field in accordance with the interference of a plurality of parasitic magnetic fields whose phases are changed, and can transmit the generated sending magnetic field to the outside.

The source loop antenna 303-1 uses the phase changing unit 305 to determine the magnitude of the phase of the plurality of parasitic magnetic fields to change and adjust at least one of the angle or direction in which the outgoing magnetic field is fed out, You can determine where to focus. At this time, the source loop antenna 303-1 can determine the magnitude of the phase change with respect to the plurality of parasitic magnetic fields, in accordance with the target angle or the target direction.

In the loop antenna array 303, the loops of the magnetic field and the parasitic magnetic field produced by the source loop antenna 303-1 and the parasitic loop antenna 303-2 are arranged differently according to the embodiment, And a superposition array of loops as shown in FIG. 3B can be formed.

In the near-field arrangement of Fig. 3A, the arrangement of the loops is stable, and the point where the delivery magnetic field is focused can be focused in one direction. On the other hand, in the overlapping arrangement of the loop of Fig. 3B, the arrangement of the loops is fluid, and the point at which the delivery magnetic field is focused can be focused in various directions while changing instantaneously.

Hereinafter, the operation flow of the magnetic field apparatus 200 using the ESPAR according to the embodiment of the present invention will be described in detail.

4 is a flowchart illustrating a method of operating a magnetic field apparatus using ESPAR according to an embodiment of the present invention.

The operating method according to the present embodiment can be performed by the magnetic field apparatus 200 using the ESPAR described above.

Referring to FIG. 4, in step 401, a magnetic field device 200 using ESPAR may configure a single source loop antenna that outputs a magnetic field. The source loop antenna may be formed of a wire wound several times in a circular shape, and has a relatively large critical directionality. Accordingly, the source loop antenna can be mainly used for radio direction detection devices and the like.

In addition, in step 403, the magnetic field apparatus 200 using ESPAR may be combined with the source loop antenna in an array form to constitute a plurality of parasitic loop antennas outputting a plurality of parasitic magnetic fields. The parasitic magnetic field output from the parasitic loop antenna can interfere with the magnetic field output to the source loop antenna and change the directionality of the magnetic field.

In the configuration of the parasitic loop antenna, the parasitic loop antenna may be configured such that the magnetic field device 200 using ESPAR has a predetermined separation distance with respect to the source loop antenna, and is radially positioned in different directions from each other.

At step 405, at the parasitic loop antenna of the magnetic field device 200 using ESPAR, the phase of the plurality of parasitic magnetic fields may be changed to determine the point at which the magnetic field is focused.

With respect to the phase change of the parasitic magnetic field, the magnetic field device 200 using ESPAR can generate a magnetic field corresponding to the input signal.

In addition, the magnetic field apparatus 200 using the ESPAR can generate the magnetic field as a sending magnetic field according to the interference of a plurality of parasitic magnetic fields whose phases are changed, and can transmit the generated sending magnetic field to an external magnetic field apparatus. Here, the outgoing magnetic field may refer to a magnetic field resulting from the change in the direction of the magnetic field output from the source loop antenna due to the phase change of the plurality of parasitic magnetic fields.

Meanwhile, the magnetic field apparatus 200 using the ESPAR can determine the magnitude of the phase change of the plurality of parasitic magnetic fields, and adjust the at least one of the angle or the direction in which the outgoing magnetic field is emitted, thereby determining the focused point.

In determining the magnitude in which the phase varies, the magnetic field apparatus 200 using ESPAR can determine the magnitude of the phase change with respect to the plurality of parasitic magnetic fields according to the target angle or the target direction.

For example, the magnetic field apparatus 200 using the ESPAR may be configured to differently determine respective set values for the plurality of parasitic magnetic fields in accordance with a target angle or a target direction associated with the relative magnetic field apparatus, By setting the changing magnitude, it is possible to send out the collecting form magnetic field to a specific point where the relative magnetic field apparatus is located.

The magnetic field apparatus 200 using ESPAR can transmit the generated sending magnetic field.

Accordingly, the magnetic field device 200 using the ESPAR can improve the focusing performance for the emitted magnetic field by adjusting the phase of the plurality of parasitic magnetic fields, thereby adjusting at least one of the angle or direction of the outgoing magnetic field emitted from the source loop antenna. , And the transmission range can be extended.

Further, the magnetic field device 200 using the ESPAR can reduce the complexity of the process for controlling the overall volume and the magnetic field phase, as compared with a device including a plurality of RF chains, by including a single RF chain, It can also be reduced.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

200: magnetic field device using ESPAR
210: source loop antenna 211: RF chain
213: Processor 215: Transmitting /
220: parasitic loop antenna

Claims (10)

And includes a processor configured to generate the magnetic field as a transmission magnetic field and to transmit the generated magnetic field to the outside in accordance with an RF chain generating a magnetic field and a plurality of parasitic magnetic fields whose phases are changed in response to the input signal Source loop antenna; And
And outputting a plurality of parasitic magnetic fields and changing a phase of the plurality of parasitic magnetic fields so that the magnetic field is focused, Parasitic loop antenna to determine point
Lt; / RTI >
Wherein the plurality of parasitic loop antennas comprises:
Wherein when the arrangement of the individual parasitic loop antennas is arranged so as not to overlap in the region of the magnetic field, a point where the outgoing magnetic field is focused is focused in one direction,
In the case where the arrangement of the individual parasitic loop antennas is arranged so as to overlap in the region of the magnetic field, a point at which the outgoing magnetic field is focused is changed so as to be concentrated in a plurality of directions
Magnetic field device. delete The method according to claim 1,
The processor comprising:
Determining a magnitude at which the phase of the plurality of parasitic magnetic fields changes and adjusting the at least one of the angle or direction in which the outgoing magnetic field is fed out,
Magnetic field device. The method of claim 3,
The processor comprising:
For a plurality of parasitic magnetic fields in accordance with a target angle or a target direction,
Magnetic field device. The method according to claim 1,
Wherein each of the plurality of parasitic loop antennas is arranged so as not to overlap in the region of the magnetic field,
A plurality of antenna elements having a predetermined distance from the source loop antenna and radially positioned in different directions
Magnetic field device. Constructing a single source loop antenna that generates a magnetic field corresponding to an input signal and generates the magnetic field as a transmission magnetic field and transmits the generated magnetic field to the outside according to interference of a plurality of parasitic magnetic fields whose phases are changed; And
Constructing a plurality of parasitic loop antennas coupled in an array with the source loop antenna to output a plurality of parasitic magnetic fields to change the phase of the plurality of parasitic magnetic fields to determine a point at which the magnetic field is focused;
Lt; / RTI >
Wherein the plurality of parasitic loop antennas comprises:
Wherein when the arrangement of the individual parasitic loop antennas is arranged so as not to overlap in the region of the magnetic field, a point where the outgoing magnetic field is focused is focused in one direction,
In the case where the arrangement of the individual parasitic loop antennas is arranged so as to overlap in the region of the magnetic field, a point at which the outgoing magnetic field is focused is changed so as to be concentrated in a plurality of directions
A method of operating a magnetic field device. delete The method according to claim 6,
A method of operating the magnetic field apparatus,
Determining, at the source loop antenna, a magnitude in which the phase of the plurality of parasitic fields varies and adjusting the at least one of the angle or direction in which the outgoing magnetic field is emitted,
Further comprising the steps of: 9. The method of claim 8,
A method of operating the magnetic field apparatus,
Dimensionally varying said phase for said plurality of parasitic magnetic fields in accordance with a target angle or a target direction
Further comprising the steps of: The method according to claim 6,
Wherein configuring the plurality of parasitic loop antennas comprises:
When the plurality of parasitic loop antennas are arranged so as not to overlap in the region of the magnetic field,
Positioning the plurality of parasitic loop antennas radially in a direction different from each other with a predetermined spacing distance with respect to the source loop antenna;
And a magnetic field generator.
KR1020150161760A 2015-11-18 2015-11-18 Magnetic field apparatus for using espar and method for operating magnetic field apparatus for using espar KR101704288B1 (en)

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KR1020150161760A KR101704288B1 (en) 2015-11-18 2015-11-18 Magnetic field apparatus for using espar and method for operating magnetic field apparatus for using espar

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050086792A (en) * 2002-11-25 2005-08-30 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Multi-loop antenna for radio-frequency identification
KR20100082295A (en) * 2009-01-08 2010-07-16 한국전자통신연구원 Apparatus for single-fed beam-steering

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050086792A (en) * 2002-11-25 2005-08-30 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Multi-loop antenna for radio-frequency identification
KR20100082295A (en) * 2009-01-08 2010-07-16 한국전자통신연구원 Apparatus for single-fed beam-steering

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