KR102232377B1 - Wireless transmitting/receiving apparatus based on feedforward and operating method thereof - Google Patents

Abstract

The present invention relates to a wireless transmitting/receiving device based on feedforward and an operating method thereof. According to an embodiment of the present invention, a wireless transmitting/receiving device includes: an asymmetric directional coupling unit receiving an output of a transmitting amplifier as an input and outputting a first output signal, a second output signal, and a third output signal; an offset signal generator which receives the first output signal and the second output signal as inputs, and generates a leakage cancellation signal by controlling a magnitude and phase of the input first output signal based on the input second output signal; and a hybrid coupling unit for canceling a transmission leakage signal corresponding to the third output signal based on the generated leakage cancellation signal. According to the present invention, it is possible to effectively cancel a transmission leakage signal with a variable cancellation structure using an asymmetric directional coupling unit having three output terminals.

Description

Feedforward-based wireless transceiver and its operation method {WIRELESS TRANSMITTING/RECEIVING APPARATUS BASED ON FEEDFORWARD AND OPERATING METHOD THEREOF}

The present invention relates to a wireless transmission/reception apparatus and a method of operation thereof, and more particularly, to a technical idea of improving the broadband isolation degree of a circulator by using a feed forward structure.

In addition, the present invention is derived from the research of the University ICT Research Center support project of the Ministry of Science, ICT and ICT and ICT (IITP-2019-2016-0-00291).

1 is a diagram for describing an example in which a transmission leakage signal occurs in a wireless transmission/reception apparatus.

Specifically, (a) of FIG. 1 shows an example of separating a transmission signal and a reception signal from a circulator provided in a wireless transmission/reception device, and FIG. 1 (b) is a transmission leakage due to a transmission signal from the circulator. It shows an example in which a signal is generated.

Referring to FIG. 1A, each reverse-directional RF system used to implement an array system for beam steering may use a circulator to simultaneously perform transmission and reception using one antenna.

Specifically, the RF system has clockwise unidirectionality, and based on the point at which the signal is transmitted, the transmission characteristic in the clockwise direction (transmission, S21), the isolation characteristic in the counterclockwise direction (isolation, S31), and input matching It can be characterized by a characteristic (matching, S11).

The degree of isolation between the three terminals of the circulator, the degree of isolation between the output of the transmitting amplifier and the input of the receiving amplifier, greatly affects the overall system characteristics, and may exhibit narrow-band characteristics.

Referring to FIG. 1B, in a wireless transmission/reception apparatus including a circulator, a transmission leakage signal (leakage power) may be generated from an output terminal of a transmission amplifier to an input terminal of a reception amplifier.

In this case, if the frequencies of the reception signal and the transmission signal _{are used differently as f 1} and f ₂ , respectively, signals corresponding to the two frequencies exist at the output stage of the transmission amplifier, and these are the input stage of the reception amplifier due to the finite isolation of the circulator. Can be leaked.

The leaked _{signal of frequency f 1} (transmission leakage signal) acts as interference to the received signal, deteriorating the reception sensitivity of the entire system, and _{the signal of the leaked frequency f 2} passes through the receiving amplifier, mixer, and transmitting amplifier. It is also a cause of generating a beamforming direction error by generating a signal of frequency f1 at the output terminal.

Accordingly, there is a need to remove a transmission leakage signal generated in a wireless transmission/reception apparatus using a circulator in a more efficient manner.

Korean Patent Registration No. 10-1669507 "Pre-processing apparatus and method for removing transmission leakage signal from receiver of wireless communication system"

An object of the present invention is to provide a wireless transmission/reception apparatus and a method of operating the same, which implements a variable cancellation structure of broadband characteristics in a feed forward method.

In addition, the present invention is to provide a wireless transmission/reception apparatus capable of effectively canceling a transmission leakage signal with a variable cancellation structure using an asymmetric directional coupling unit having three output terminals, and an operation method thereof.

In addition, the present invention is to provide a wireless transmission/reception apparatus capable of effectively canceling a transmission leakage signal only by an output of an asymmetric directional coupling unit and a method of operation thereof.

In addition, the present invention is to provide a wireless transmission/reception apparatus capable of effectively canceling a transmission leakage signal through a variable canceling structure designed to be ultra-miniature and ultra-low in price, and an operation method thereof.

The wireless transmission/reception apparatus according to an embodiment includes an asymmetric directional coupler configured to receive an output of a transmission amplifier as an input and output a first output signal, a second output signal, and a third output signal, and a first output signal and a second output signal. A cancellation signal generator for generating a leakage cancellation signal by receiving as an input and controlling the magnitude and phase of the input first output signal based on the input second output signal, and a third output based on the generated leakage cancellation signal It may include a hybrid coupling unit for canceling the transmission leakage signal corresponding to the signal.

According to one side, the asymmetric directional coupling unit may output a first output signal and a second output signal having different coupling levels.

According to one side, the asymmetric directional coupling unit may output a third output signal to an input terminal of a circulator.

According to one side, the transmission leakage signal may be a leakage signal generated from the circulator receiving the third output signal as an input to the input terminal of the hybrid coupling unit.

According to one side, the leakage cancellation signal may be a signal having a phase difference of 180° from the transmission leakage signal.

According to one side, the cancellation signal generator may control the size of the input first output signal with a preset size value in consideration of the isolation characteristic of the circulator.

According to one side, the cancellation signal generator may further include a log amplifier that receives the second output signal as an input and generates a bias voltage corresponding to a frequency level of the input second output signal.

According to one side, the cancellation signal generation unit includes at least one resistor and at least one variable capacitor, receives a first output signal as an input, and receives a first output signal corresponding to a capacitance value of the at least one variable capacitor. It may further include a variable frequency response block for controlling the magnitude and phase.

According to one side, the capacitance value of at least one variable capacitor may be varied by the generated bias voltage.

A method of operating a wireless transmission/reception apparatus according to an embodiment includes the steps of receiving an output of a transmission amplifier as an input from an asymmetric directional coupling unit and outputting a first output signal, a second output signal, and a third output signal, and a cancellation signal generation unit. In the step of receiving the first output signal and the second output signal as inputs, and generating a leakage cancellation signal by controlling the magnitude and phase of the inputted first output signal based on the inputted second output signal, and in the hybrid combiner It may include the step of canceling the transmission leakage signal corresponding to the third output signal based on the generated leakage cancellation signal.

According to an embodiment, a variable cancellation structure of broadband characteristics may be implemented in a feed forward method.

According to an embodiment, a transmission leakage signal can be effectively canceled by a variable cancellation structure using an asymmetric directional coupling unit having three output terminals.

According to an embodiment, it is possible to effectively cancel the transmission leakage signal only by the output of the asymmetric directional coupling unit.

According to an embodiment, it is possible to efficiently cancel a transmission leakage signal through a variable cancellation structure designed to be ultra-miniaturized and cost-effective.

1 is a diagram for describing an example in which a transmission leakage signal occurs in a wireless transmission/reception apparatus.
2 is a diagram illustrating a wireless transmission/reception apparatus according to an embodiment.
3 is a diagram illustrating an implementation example of a wireless transmission/reception apparatus according to an embodiment.
4 is a diagram illustrating a wireless transmission/reception apparatus according to another embodiment.
5 is a diagram illustrating a method of operating a wireless transmission/reception apparatus according to an embodiment.

Specific structural or functional descriptions of embodiments according to the concept of the present invention disclosed in the present specification are exemplified only for the purpose of describing embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention They may be implemented in various forms and are not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes changes, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various elements, but the elements should not be limited by the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the concept of the present invention, the first component may be referred to as the second component, Similarly, the second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Expressions describing the relationship between components, for example, "between" and "just between" or "directly adjacent to" should be interpreted as well.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate that the specified features, numbers, steps, actions, components, parts, or combinations thereof exist, but one or more other features or numbers, It is to be understood that the presence or addition of steps, actions, components, parts, or combinations thereof, does not preclude the possibility of preliminary exclusion.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be construed as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present specification. Does not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. The same reference numerals shown in each drawing indicate the same members.

2 is a diagram illustrating a wireless transmission/reception apparatus according to an embodiment.

The wireless transmission/reception apparatus described below may be a wireless communication transmission/reception apparatus for transmitting and receiving a wireless communication signal or a wireless power transmission apparatus for transmitting a wireless power signal.

In addition, when the wireless transmission/reception device is a wireless power transmission device, the received signal may be a signal received from the wireless power receiver, and the transmission signal may be a signal corresponding to the wireless power transmitted to the wireless power receiver.

In addition, when the wireless transmission/reception device is a wireless power transmission device, the wireless transmission/reception device may be a device corresponding to a reverse directional system for long-distance wireless power transmission.

Referring to FIG. 2, the wireless transmission/reception apparatus 200 according to an embodiment may implement a variable cancellation structure of broadband characteristics in a feed forward method.

In addition, the wireless transmission/reception apparatus 200 can efficiently cancel the transmission leakage signal by using a variable cancellation structure using an asymmetric directional coupling unit having three output terminals.

In addition, the wireless transmission/reception apparatus 200 may effectively cancel the transmission leakage signal only by the output of the asymmetric directional coupling unit.

In addition, the wireless transmission/reception apparatus 200 may efficiently cancel a transmission leakage signal through a variable cancellation structure designed to be ultra-miniature and ultra-low cost.

The feed forward-based variable cancellation structure described below may mean a structure that improves the bandwidth of isolation so that the transmission leakage signal does not leak from the output terminal of the transmission amplifier provided in the wireless transmission/reception device 200 to the input terminal of the reception amplifier. have.

To this end, the wireless transmission/reception apparatus 200 according to an embodiment may include an asymmetric directional coupling unit 210, a cancellation signal generation unit 220, and a hybrid coupling unit 230.

Specifically, the asymmetric directional coupler 210 according to an embodiment may receive the output of the transmission amplifier as an input and output a first output signal, a second output signal, and a third output signal.

In other words, the asymmetric directional coupler 210 may be a three-way coupler that receives the output of the transmission amplifier as a single input and outputs first to third output signals through three output terminals.

According to one side, the asymmetric directional coupling unit 210 may output a first output signal and a second output signal having different coupling levels.

For example, different coupling degrees (asymmetry) may be determined corresponding to a frequency magnitude of a transmission leakage signal leaking from the circulator toward the hybrid coupling unit. In addition, different coupling degrees may be determined in advance in consideration of the isolation characteristics of the circulator.

For a more specific example, assuming that the output of the transmission amplifier is '10', the asymmetric directional coupler 210 may be a signal having a magnitude of '1' and the second output signal of '2'. have.

According to one side, the asymmetric directional coupling unit 210 may output a third output signal to an input terminal of a circulator. In other words, the third output signal of the asymmetric directional coupler 210 may be a transmission signal of the wireless transmission/reception device 200 output to the outside through a circulator and an antenna.

The cancellation signal generation unit 220 according to an embodiment receives the first output signal and the second output signal of the asymmetric directional coupling unit 210 as inputs, and a first output input based on the input second output signal. A leakage canceling signal can be generated by controlling the magnitude and phase of the signal.

In other words, the leakage cancellation signal may be a first output signal whose magnitude and phase are controlled.

According to one side, the leakage cancellation signal may be a signal having a phase difference of 180° from the transmission leakage signal, which is a leakage signal generated from the circulator receiving the third output signal of the asymmetric directional coupling unit 210 as an input, to the input terminal of the hybrid coupling unit. have.

In addition, the cancellation signal generation unit 220 may control the level of the first output signal of the asymmetric directional coupling unit 210 input with a preset size value in consideration of the isolation characteristic of the circulator.

Specifically, the wireless transmission/reception apparatus 100 includes a first path through which the first to second output signals are transmitted to the canceling signal generation unit 120 and a third output signal through a transmission path corresponding to the output signal of the transmission amplifier. It can be divided into a second path transmitted to the radar, and the cancellation signal generation unit 120 generates a leakage cancellation signal that has the same magnitude as the transmission leakage signal generated through the second path, and a phase difference of 180°. can do.

In this case, the transmission leakage signal may be attenuated (eg, 20 dB) in the signal size due to the isolation characteristic of the circulator.

Accordingly, when the attenuated magnitude of the transmission leakage signal is 20 dB, the cancellation signal generation unit 120 is attenuated by 20 dB like the transmission leakage signal, and may be designed to generate a leakage cancellation signal having a phase difference of 180°.

According to one side, the cancellation signal generation unit 220 receives the second output signal of the asymmetric directional coupling unit 210 as an input, and generates a bias voltage corresponding to the frequency level of the input second output signal ( logarithm amplifier) may be further included.

In addition, the cancellation signal generation unit 220 includes at least one resistor and at least one variable capacitor, receives a first output signal of the asymmetric directional coupling unit 210 as an input, and receives a capacitance value of at least one variable capacitor. It may further include a variable frequency response block for controlling the magnitude and phase of the input first output signal corresponding to.

According to one side, a capacitance value of at least one variable capacitor may be varied by a bias voltage generated through a logarithmic amplifier.

In other words, the output signal of the log amplifier may be a control signal for controlling a capacitance value of at least one variable capacitor provided in the variable frequency response block.

The hybrid coupling unit 230 according to an embodiment may cancel the transmission leakage signal corresponding to the third output signal of the asymmetric directional coupling unit 210 based on the generated leakage cancellation signal.

For example, the hybrid coupler 230 may be a power combiner that cancels a transmission leakage signal.

Specifically, the hybrid coupling unit 230 may remove the transmission leakage signal by adding the transmission leakage signal and the leakage cancellation signal having the same size as the transmission leakage signal and having a phase difference of 180°.

That is, after the wireless transmission/reception apparatus 200 is divided into a first path and a second path, the divided paths are combined into one path through the hybrid coupling unit 230 to generate a transmission leakage signal, and as a result, the corresponding frequency The degree of isolation of the circulator can be improved.

A detailed configuration of the wireless transmission/reception apparatus 200 according to an embodiment will be described in more detail with reference to FIG. 3 in the following embodiment.

3 is a diagram illustrating an implementation example of a wireless transmission/reception apparatus according to an embodiment.

In other words, FIG. 3 is a diagram for explaining an example of a wireless transmission/reception apparatus according to an embodiment described with reference to FIG. 2, and a description overlapping with the content described with reference to FIG. 2 will be omitted from among the contents described with reference to FIG. 3. It should be.

Referring to FIG. 3, a wireless transmission/reception apparatus 300 according to an embodiment may include an asymmetric directional coupler 310, a cancellation signal generator 320, and a hybrid combiner 330.

In addition, the wireless transmission/reception apparatus 300 according to an embodiment is provided between the transmission amplifier 340 connected to the input terminal of the asymmetric directional coupling unit 310, the asymmetric directional coupling unit 310 and the hybrid coupling unit 330 A receiving amplifier 360 connected to the output terminal of the circulator 350 and the hybrid coupling unit 330 may be further included.

Specifically, the asymmetric directional coupler 310 may receive the output of the transmission amplifier 340 as an input and output a first output signal, a second output signal, and a third output signal.

That is, the asymmetric directional coupler 310 may be designed as a three-way directional coupler having one input and three outputs, and the coupling degree of each of the first to second output terminals corresponding to the first to second output signals ( coupling levels) can be designed to have different asymmetry characteristics.

According to one side, the asymmetric directional coupling unit 310 may output a third output signal to an input terminal of the circulator 350. In other words, the third output signal of the asymmetric directional coupler 310 may be a transmission signal of the wireless transmission/reception device 300 output to the outside through a circulator and an antenna.

The cancellation signal generation unit 320 according to an embodiment receives the first output signal and the second output signal of the asymmetric directional coupling unit 310 as inputs, and a first output input based on the input second output signal. A leakage canceling signal can be generated by controlling the magnitude and phase of the signal.

Specifically, the cancellation signal generation unit 320 may further include a log amplifier 321 and a variable frequency response block 322, and the first output signal of the asymmetric directional coupling unit 310 is a variable frequency response block 322 ), and the second output signal of the asymmetric directional coupler 310 may be received as an input of the log amplifier 321.

More specifically, the log amplifier 321 receives the second output signal of the asymmetric directional coupler 310 as an input, and a bias voltage corresponding to the frequency level of the second output signal of the input asymmetric directional coupler 310 Can be created.

In addition, the variable frequency response block 322 includes at least one resistor and at least one variable capacitor, receives a first output signal of the asymmetric directional coupling unit 310 as an input, and receives a capacitance value of at least one variable capacitor. The magnitude and phase of the inputted first output signal can be controlled in response to.

Meanwhile, the variable capacitance value of the at least one variable capacitor may be controlled by the magnitude of the bias voltage generated through the log amplifier 321.

That is, the variable frequency response block 322 may serve as a band-pass filter or a band-reject filter.

In other words, the log amplifier 321 may generate a bias voltage capable of varying the capacitance value of the variable capacitor provided in the variable frequency response block 322, and the variable frequency response block 322 may generate the generated bias voltage ( DC voltage value) can generate a leakage cancellation signal by simultaneously controlling the magnitude response and phase response in a frequency band above the cutoff frequency.

More specifically, the power value of the second output signal of the asymmetric directional coupler 310 may be designed to output a different value according to the frequency level of the second output signal, and the log amplifier 321 is A DC voltage value corresponding to the power value can be output.

The DC voltage value generated through the log amplifier 321 may be used as a bias voltage that controls the capacitance of the variable capacitor in the variable frequency response block 322, and when the capacitance is adjusted according to the frequency of the second output signal, the variable frequency The cutoff frequency of the response block 322 is controlled, so that the variable frequency response block 322 has a leakage having a desired size and phase through a change in the amplitude response and the phase response for the first output signal. It is possible to generate a cancellation signal.

In order to control the size and phase at the same time as described above, since the operating frequency must be designed to be controlled in a region higher than the cutoff frequency, the wireless transmission/reception device 300 according to an embodiment includes a three-way asymmetric directional coupling unit 310, The log amplifier 321 and the variable frequency response block 323 may be designed to perform feed forward cancellation in a wide frequency band (broadband).

The hybrid coupling unit 330 according to an embodiment cancels the transmission leakage signal corresponding to the third output signal of the asymmetric directional coupling unit 310 based on the leakage cancellation signal generated through the cancellation signal generation unit 320. I can.

Specifically, the hybrid coupling unit 330 may remove the transmission leakage signal leaking in the direction of the input end of the reception amplifier 360 by adding the transmission leakage signal and the leakage cancellation signal having the same size as the transmission leakage signal and having a phase difference of 180°. have.

4 is a diagram illustrating a wireless transmission/reception apparatus according to another embodiment.

In other words, FIG. 4 is a diagram for explaining another example of a wireless transmission/reception device according to an embodiment described with reference to FIGS. 2 to 3, and a wireless transmission/reception device according to another embodiment may be a wireless power transmission device.

In addition, the wireless transmission/reception apparatus according to another embodiment may include a plurality of antennas (transmission coils) to transmit wireless power (transmission signals) in a direction in which the wireless power receiver is located.

Referring to FIG. 4, the wireless transmission/reception apparatus 400 according to another embodiment uses a zone-based maximum transmission efficiency search algorithm based on real-time monitoring of a received voltage and 3D scanning to determine the angles (direction angles) of each of a plurality of antennas. Can be optimized.

In addition, the wireless transmission/reception apparatus 400 according to another embodiment may cancel a transmission leakage signal generated due to wireless power (transmission signal) transmitted through an antenna having an optimized angle.

For example, the transmission leakage signal may be a leakage signal generated from the circulator in the direction of the reception amplifier due to wireless power (transmission signal) output from the output terminal of the transmission amplifier.

To this end, the wireless transmission/reception apparatus 400 according to another embodiment may include a switching unit 410, a receiver position estimating unit 420, and a leakage signal canceling unit 430.

In addition, the receiver position estimating unit 420 further includes a receiving unit 421, a radiation pattern reading unit 422 and a position estimating unit 423, and the leakage signal canceling unit 430 is an asymmetric directional coupling unit 431, A cancellation signal generation unit 432 and a hybrid coupling unit 433 may be further included.

Meanwhile, the leakage signal canceling unit 430 of FIG. 4 may be a wireless transmission/reception apparatus according to an embodiment described with reference to FIGS. 2 to 3.

In other words, the asymmetric directional coupling unit 431, the cancellation signal generation unit 432, and the hybrid coupling unit 433 according to another embodiment of FIG. 4 are asymmetric directional coupling according to an embodiment described with reference to FIGS. 2 to 3. Since the sub, canceling signal generation unit and the hybrid combining unit perform the same operation, descriptions overlapping with those described with reference to FIGS. 2 to 3 will be omitted hereinafter.

Specifically, the switching unit 410 according to another embodiment may control the leakage signal canceling unit 430 to operate after the receiver position estimating unit 420 operates.

According to one side, the switching unit 410 may control operations of the receiver position estimating unit 420 and the leakage signal canceling unit 430 based on an operation control signal received from the outside.

For example, the switching unit 410 may control the receiver position estimating unit 420 to operate when an operation control signal related to the position estimation of the receiver is received.

In addition, the switching unit 410 may control the leakage signal canceling unit 430 to operate when receiving an operation control signal related to wireless power transmission.

The receiver position estimating unit 420 according to another embodiment may estimate the position of at least one receiver based on information on a plurality of beams radiated at different radiation angles from a communication antenna provided in the wireless transmission/reception device 400. I can.

Specifically, the receiving unit 421 according to another embodiment may receive information on a plurality of beams radiated at different radiation angles from an antenna.

In other words, the receiving unit 421 may receive information on at least two or more beams (first to nth beams, where n is a positive integer) radiated from the antenna.

According to one side, the information on the plurality of beams may include a size of a radiation angle of each of the plurality of beams and a received power value of a receiver corresponding to each of the plurality of beams.

In other words, the receiving unit 421 receives the magnitude of the radiation angle of each of the plurality of beams radiated from a separate beam control means provided in the wireless transmission/reception device 400, and a received power value corresponding to each of the plurality of beams from the receiver Can be received.

The radiation pattern reading unit 422 according to another embodiment may read radiation pattern information corresponding to each of the plurality of beams, based on information on the plurality of beams.

According to one side, the radiation pattern reading unit 422 may pre-store radiation pattern information corresponding to each of m (here, m is a positive integer) beams radiated from the antenna at different radiation angles. In addition, the radiation pattern reading unit 422 may read radiation pattern information corresponding to information on a plurality of beams from among the previously stored radiation pattern information.

In other words, the radiation pattern reading unit 422 collects and stores radiation pattern information corresponding to each of the m beams radiated at different radiation angles at all angles (0° to 360°) with respect to the communication antenna. It is possible to read (read) radiation pattern information corresponding to information on a plurality of beams from among the previously stored radiation pattern information.

That is, the receiver position estimation unit 420 according to another embodiment may receive radiation pattern information for all beams formed in each direction from a communication antenna, where the radiation pattern information is when beams are formed at a specific radiation angle. It may be an antenna gain calculated at all angles corresponding to the formed beam.

For a more specific example, when the radiation angle of the beam radiated from the communication antenna is 0°, the radiation pattern information is all antennas corresponding to the beam radiated at a radiation angle of 0° within an angular range of -90° to 90°. It may contain a gain value.

In other words, when the radiation angle is 0° and the angular range is -90° to 90°, the radiation pattern information is at all angles (-90° to 90°) for the beam radiated at the radiation angle of 0°, respectively. May include an antenna gain value of.

The position estimating unit 423 according to another exemplary embodiment may compare each of the radiation pattern information read through the radiation pattern reading unit 422 with each other, and estimate the position of the receiver based on the comparison result.

According to one side, the position estimating unit 423 may calculate an antenna gain corresponding to each of the read radiation pattern information, and may subtract each decibel (dB) value of the calculated antenna gain from each other.

More specifically, Equation 1 below represents an RSRP value received from a receiver corresponding to two beams (first to second beams) radiated from a communication antenna.

[Equation 1]

은 제1 빔에 대응되는 수신 전력 값을 나타내고,

은 제2 빔에 대응되는 수신 전력 값을 나타내며,

은 제1 빔의 안테나 이득의 데시벨(dB) 값을 나타내고,

은 제2 빔의 안테나 이득의 데시벨(dB) 값을 나타내며,

은 거리 r에 따른 경로손실 값을 나타내고,

은 송신 전력을 나타낼 수 있다. here,

Denotes a received power value corresponding to the first beam,

Represents a received power value corresponding to the second beam,

Represents the decibel (dB) value of the antenna gain of the first beam,

Represents the decibel (dB) value of the antenna gain of the second beam,

Represents the path loss value according to the distance r,

May represent the transmit power.

)과 경로손실 값(

)은 서로 동일하다는 점을 이용하면 하기 수학식2을 도출할 수 있다. In addition, in Equation 1, the transmit power (

) And path loss value (

Using the fact that) is the same as each other, the following Equation 2 can be derived.

[Equation 2]

,

) 각각을 감산(

)한 결과 값이 각도

의 크기에 따라 변화하기 때문에, 위치 추정부(420)는 안테나 이득의 데시벨(dB) 값

,

을 비교하여 특정

을 갖는 각도

를 찾을 수 있다. That is, the decibel (dB) value of the antenna gain of the first to second beams (

,

) Subtract each (

) And the resulting value is an angle

Because it changes according to the size of, the position estimating unit 420 is a decibel (dB) value of the antenna gain

,

By comparing the specific

Angle with

Can be found.

,

)을 사전에 알고 있기 때문에 모든 각도에 대해

를 만족하는 통신 안테나와 수신기 간의 각도(

)를 산출할 수 있다. Here, the position estimating unit 423 uses the radiation pattern reading unit 422 to provide a decibel (dB) value of the antenna gain (

,

) In advance, so for all angles

The angle between the communication antenna and the receiver satisfying (

) Can be calculated.

That is, the position estimating unit 423 according to another embodiment may accurately estimate the position of the receiver by randomly selecting only two beams radiated from the communication antenna at different radiation angles.

,

)을 산출하고, 산출된 안테나 이득의 데시벨(dB) 값(

,

) 각각을 서로 감산(

)하며, 감산 결과가 최소가 되는 지점에서의 각도를 통신 안테나와 수신기간의 각도(

)로 추정할 수 있다.For a more specific example, the position estimating unit 423 includes a decibel (dB) value of an antenna gain corresponding to each of the radiation pattern information for the first to second beams (

,

) Is calculated, and the decibel (dB) value of the calculated antenna gain (

,

) Subtract each from each other (

), and the angle at the point where the subtraction result is minimal is the angle between the communication antenna and the receiver (

) Can be estimated.

That is, the wireless transmission/reception apparatus according to another embodiment may optimize the angle of each of the plurality of antennas for wireless power transmission by using a zone-based maximum transmission efficiency search algorithm based on real-time monitoring of a received voltage and 3D scanning. .

In addition, the wireless transmission/reception apparatus according to another exemplary embodiment can transmit wireless power with high efficiency by optimizing the angle of each of the plurality of transmission coils, and secure a degree of freedom according to the movement of the receiver.

In addition, the wireless transmission/reception apparatus according to another embodiment may efficiently cancel the transmission leakage signal through the variable cancellation structure.

5 is a diagram illustrating a method of operating a wireless transmission/reception apparatus according to an embodiment.

In other words, FIG. 5 is a diagram for explaining an example according to the operation of the wireless transmission/reception apparatus according to an embodiment described with reference to FIGS. 2 to 4, and the contents described with reference to FIG. 5 are described with reference to FIGS. 2 to 4. Descriptions that are redundant with the content will be omitted.

Referring to FIG. 5, in step 510, the operating method of the wireless transmission/reception apparatus according to an embodiment receives the output of the transmission amplifier as an input by the asymmetric directional coupling unit to receive a first output signal, a second output signal, and a third output signal. Can be printed.

Next, in step 520, the operating method of the wireless transmission/reception apparatus according to an embodiment is to receive the first output signal and the second output signal as inputs from the offset signal generator, and the inputted second output signal based on the inputted second output signal. 1 A leakage cancellation signal can be generated by controlling the magnitude and phase of the output signal.

Next, in step 530, the method of operating the wireless transmission/reception apparatus according to an embodiment may cancel the transmission leakage signal corresponding to the third output signal based on the leakage cancellation signal generated by the hybrid combiner.

Consequently, using the present invention, it is possible to implement a variable offset structure of broadband characteristics in a feed forward method.

In addition, a transmission leakage signal can be effectively canceled by a variable cancellation structure using an asymmetric directional coupling unit having three output terminals.

In addition, it is possible to effectively cancel the transmission leakage signal only by the output of the asymmetric directional coupling unit.

In addition, it is possible to efficiently cancel the transmission leakage signal through the variable cancellation structure designed for miniaturization and ultra-low cost.

As described above, although the embodiments have been described by the limited drawings, various modifications and variations can be made from the above description to those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as systems, structures, devices, circuits, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and those equivalent to the claims also fall within the scope of the claims to be described later.

200: wireless transmission/reception device 210: asymmetric directional coupling unit
220: offset signal generation unit 230: hybrid coupling unit

Claims (10)

An asymmetric directional coupler for receiving the output of the transmission amplifier as an input and outputting a first output signal, a second output signal, and a third output signal;
Generating a cancellation signal that receives the first output signal and the second output signal as inputs, and generates a leakage cancellation signal by controlling the magnitude and phase of the inputted first output signal based on the inputted second output signal Wealth and
Hybrid combiner for canceling the transmission leakage signal corresponding to the third output signal based on the generated leakage cancellation signal
Including,
The cancellation signal generation unit,
Includes at least one resistor and at least one variable capacitor, receives the first output signal as an input, and receives the input in response to a capacitance value of the at least one variable capacitor that is variable based on the second output signal Further comprising a variable frequency response block for controlling the magnitude and phase of the first output signal
Wireless transceiver. The method of claim 1,
The asymmetric directional coupling portion,
Outputting the first output signal and the second output signal having different coupling levels
Wireless transceiver. The method of claim 1,
The asymmetric directional coupling portion,
Outputting the third output signal to an input terminal of a circulator
Wireless transceiver. The method of claim 3,
The transmission leakage signal is a leakage signal generated from the circulator receiving the third output signal as an input to the input terminal of the hybrid coupling unit.
Wireless transceiver. The method of claim 1,
The leakage cancellation signal is a signal having a phase difference of 180° from the transmission leakage signal.
Wireless transceiver. The method of claim 3,
The cancellation signal generation unit,
Controlling the size of the input first output signal with a preset size value in consideration of the isolation characteristic of the circulator
Wireless transceiver. The method of claim 1,
The cancellation signal generation unit,
A logarithmic amplifier that receives the second output signal as an input and generates a bias voltage corresponding to the frequency level of the input second output signal
A wireless transmission/reception device further comprising a. delete The method of claim 7,
The capacitance value of the at least one variable capacitor is varied by the generated bias voltage.
Wireless transceiver. Receiving an output of the transmission amplifier as an input and outputting a first output signal, a second output signal, and a third output signal, by an asymmetric directional coupling unit;
In the cancellation signal generation unit, a leakage cancellation signal is received by receiving the first output signal and the second output signal as inputs and controlling the magnitude and phase of the inputted first output signal based on the inputted second output signal. And
In the hybrid coupling unit, canceling the transmission leakage signal corresponding to the third output signal based on the generated leakage cancellation signal.
Including,
Generating the leakage cancellation signal,
In the variable frequency response block of the cancellation signal generator including at least one resistor and at least one variable capacitor, the at least one variable receiving the first output signal as an input and varying based on the second output signal Controlling the magnitude and phase of the input first output signal in response to the capacitance value of the capacitor
How to operate a wireless transceiver.

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