baber/WOPTO huggingface dataset:
Patent KR-20200116979-A (KR)
Title: 폴리아미드에서의 열 노화 후 용접 이음매 강도를 증가시키기 위한 다가 알코올의 용도
Inventor: WAGNER SEBASTIAN
IPC: B29C45/00
Filed: 2019-01-31
Abstract: 본 발명은 사출 성형에 의해 폴리아미드 조성물로부터 제조된 성형품의 열 노화 후 용접 이음매 강도를 증가시키기 위한, 적어도 하나의 폴리아미드를 포함하는 폴리아미드 조성물에서의 2개 초과의 히드록실기를 갖는 다가 알코올의 용도로서, 사출 성형 동안에, 용융된 폴리아미드 조성물의 적어도 두 유동 선단이 충돌하여 적어도 하나의 용접 이음매를 형성하는 것인 용도에 관한 것이다.
Patent KR-20200118160-A (KR)
Title: 고온 산소 버너와 자열 개질기의 통합
Inventor: SHAH MINISH MAHENDRA
IPC: C01B3/38
Filed: 2019-01-31
Abstract: 본 발명은 합성가스를 생성하기 위한 시스템에서 고온 산소 버너와 자열 개질기의 통합에 관한 것이다.
Patent KR-20200124245-A (KR)
Title: 플라빈 아데닌 디뉴클리오티트-글루코즈 탈수소 효소와 사이토크롬 분자의 융합 단백질
Inventor: SODE KOJI
IPC: C12N15/70
Filed: 2019-03-08
Abstract: 본 발명의 목적은 직접 전자 이동 능력을 가진 균질 유래 FADGDH를 제공하는 것이다.  균질 유래한 FADGDH 또는 그 변이체 및 FADGDH 또는 그 변이체의 N-말단에에 연결된 시토크롬 분자가 연결된 융합 단백질을 제공한다.
Patent KR-20200122336-A (KR)
Title: 암호화폐 지갑 및 암호화폐 계좌 관리
Inventor: LAMESH LIOR
IPC: G06F21/57
Filed: 2019-02-14
Abstract: 암호화폐를 저장하고 관리하기 위한 디지털 지갑 장치에 있어서, 상기 디지털 지갑 장치는 다른 디지털 장치와 전자적으로 분리되며, 임의의 컴퓨터 인터페이스와 분리된 암호화폐 관리 집적회로(IC); 상기 암호화폐 관리 IC에 탑재되고 암호화폐의 개인키(private key)와 상기 암호화폐의 공개키(public key)를 저장하는 비일시적 컴퓨터 판독 가능 저장 매체; 사용자로부터 입력을 수신하는 MMI(man-machine interface); 상기 입력에 기초하여 상기 암호화폐의 거래(transaction)를 생성하고 상기 개인키를 사용하여 상기 거래에 서명하기 위해 거래 코드를 실행하기 위한 상기 암호화폐 관리 IC에 탑재된 적어도 하나의 프로세서; 그리고 네트워크를 통해 상기 거래를 브로드캐스팅하기 위해 상기 거래를 통신 장치로 전송하기 위한 단방향 통신 하드웨어를 포함한다.
Patent KR-20200123824-A (KR)
Title: 증대된 내약품성을 갖는 습식 밀봉 코크
Inventor: SNIDER MATTHEW T
IPC: H01M8/2485
Filed: 2019-03-06
Abstract: 코크 조성물은 적어도 1종의 분말 성분 및 적어도 1종의 결합제 성분을 포함하며, 따라서 분말 성분은 25㎛ 미만 95% 및 1㎛ 초과 90%의 범위의 입자 크기 분포를 갖는다. 용융 탄산염 연료전지(MCFC) 시스템은 연료전지 스택, 매니폴드, 및 연료전지 스택과 매니폴드 사이에 배치된 코크 조성물을 포함한다.
Patent KR-20200133254-A (KR)
Title: 유체 펌핑 시스템
Inventor: HUMER CHRISTIAN
IPC: F04B17/03
Filed: 2019-03-06
Abstract: 내연 기관을 가지는 차량용 유체 펌핑 시스템으로, 상기 유체 펌핑 시스템은 하우징(3); 전기 모터(20); 상기 내연 기관에 의하여 구동될 수 있는 제1 부재, 상기 전기 모터(20)에 의하여 구동되는 제2 부재 및 제3 부재를 가지는 유성 기어(7); 및 상기 유성 기어 세트의 제3 부재에 의하여 구동되는 펌프(14)를 포함하고, 상기 하우징(3)은 펌프 플랜지(4) 및 도르래 커버(6)를 가지는 도르래(5)에 의하여 폐쇄되고, 적어도 상기 도르래(5) 및/또는 상기 도르래(5)에 배치되는 링 기어(10)는 플라스틱으로 제조된다.
Patent KR-20200139206-A (KR)
Title: 비연소가열형 흡연 물품용의 권지, 비연소가열형 흡연 물품 및 전기가열형 흡연 시스템
Inventor: OSAWA NORIKO
IPC: A24F40/20
Filed: 2018-05-01
Abstract: 비연소가열형 흡연 물의 외주면이 되는 면에, 감열재료가 첨가되는 부분을 가지는 비연소가열형 흡연 물품용의 권지이고, 가열 전의 권지에 있어서 감열재료가 첨가되어 있는 부분과, 상기 권지를 200℃에서 5분간 가열한 후의 감열재료가 첨가되어 있는 부분의 색차 ΔE*가 15이상인 권지를 제공한다.
Patent KR-20200141489-A (KR)
Title: 처리 장치 및 매립 방법
Inventor: HONDA MINORU
IPC: C23C16/56
Filed: 2019-04-18
Abstract: 처리 용기 내에 마이크로파 전력을 인가하는 마이크로파 전력 인가부와, 상기 처리 용기 내의 기판을 탑재하는 탑재대에 바이어스 전압 발생용의 고주파 전력을 인가하는 고주파 전력 인가부를 갖고, 가스를 공급하는 가스 공급부와, 제어부를 갖고, 상기 제어부는, 미리 정해진 성막 조건에 근거해 마이크로파 전력 및 바이어스 전압 발생용의 고주파 전력을 인가하고, Si와 H와 N을 포함하는 가스를 공급해서 마이크로파 플라즈마에 의한 성막 처리를 행하고, 미리 정해진 에칭 조건에 근거해 H를 포함하는 가스 또는 H와 Ar을 포함하는 가스를 공급해서 마이크로파 플라즈마에 의한 에칭 처리를 행하는 것을 반복하고, 기판 상에 형성된 오목부에의 SiN막의 매립을 제어하는 처리 장치가 제공된다.
Patent KR-20200140906-A (KR)
Title: 은납재 및 해당 은납재를 사용한 접합 방법
Inventor: KISHIMOTO TAKAOMI
IPC: C22C5/06
Filed: 2018-10-24
Abstract: 본 발명은 은, 구리, 아연, 망간, 니켈 및 주석을 필수적인 구성 원소로 하는 은납재에 관한 것이다.  35 질량％ 이상 45 질량％ 이하의 은과, 18 질량％ 이상 28 질량％ 이하의 아연과, 2 질량％ 이상 6 질량％ 이하의 망간과, 1.5 질량％ 이상 6 질량％ 이하의 니켈과, 0.5 질량％ 이상 5 질량％ 이하의 주석과, 잔부 구리 및 불가피 불순물을 포함하는 은납재이다.  그리고, 상기 조성 범위에 있어서, 망간 함유량(C Mn ) 및 니켈 함유량(C Ni )에 대해 소정의 관계를 설정함으로써, 가공성이나 습윤성에 관해서도 양호한 특성을 갖는 은납재로 할 수 있다.  본 발명의 은납재는, 은 함유량을 저감시키면서, 저융점화와 고상선 온도와 액상선 온도의 온도차의 축소를 도모하고 있다.
Patent KR-20210010878-A (KR)
Title: 항균 화합물
Inventor: WILKINSON ANDREW
IPC: C07D401/04
Filed: 2019-05-16
Abstract: 본 발명은 식(I)의 화합물과 이 화합물을 사용하는 치료 방법에 관한 것이다. 본 발명의 화합물은 세균성 감염을 치료하기 위해 항균제와 조합하여 사용될 수 있다. 보다 구체적으로, 식(I)의 화합물은 카르바페넴(carbapenem)으로 알려진 항균제 종류와 조합하여 사용될 수 있다. 본 발명의 신규 화합물은 효소 억제제이고, 보다 구체적으로는 메탈로- β -락타마아제(metallo- β -lactamase) 억제제이다.
Patent KR-20210009375-A (KR)
Title: 조성물, 막, 광학 필터, 고체 촬상 소자, 적외선 센서, 광학 필터의 제조 방법, 카메라 모듈, 화합물, 및 분산 조성물
Inventor: SAMEJIMA Suguru
IPC: G03F7/004
Filed: 2019-09-04
Abstract: 내광성이 우수한 조성물의 제공, 상기 조성물을 이용한 막, 광학 필터, 고체 촬상 소자, 적외선 센서, 광학 필터의 제조 방법, 및 카메라 모듈, 신규 화합물, 및 내광성이 우수한 분산 조성물을 제공한다. 조성물은, 식 (1)로 나타나는 구조를 갖는 화합물과, 바인더 및 경화성 화합물로 이루어지는 군으로부터 선택된 적어도 1종의 화합물을 포함한다. 식 (1) 중, X는 각각 독립적으로, 단결합 또는 연결기를 나타내고, Z 1  및 Z 2 는 각각 독립적으로, 지방족환 또는 방향족환을 형성하는 기를 나타내며, R 9  및 R 10 으로 이루어지는 군으로부터 선택된 적어도 하나에 있어서 색소 구조를 갖는 기가 결합 혹은 배위하고 있고, 상기 색소 구조를 갖는 기가 결합 혹은 배위하고 있지 않은 R 9  또는 R 10 은, 치환기를 나타내며, R 9  및 R 10 은, 서로 결합하여, 붕소 원자와 함께 환을 형성해도 된다.
Patent KR-20220100437-A (KR)
Inventor: JEON BYUNG JEONG
IPC: H04N21/4363
Filed: 2021-01-08
Abstract: Disclosed are a display device and a control method for the same. The display device comprises a display, and a processor. The processor controls the display to display first content; when a multi-view execution command is input, determines at least one piece of content for forming a multi-view screen on the basis of the context in which the multi-view execution command is input; displays, on the display, a list including the at least one piece of content; and displays, on the display, the multi-view screen including the first content and second content selected from among the at least one piece of content included in the list according to a user command. The first content can be provided by a first external device connected by means of a first interface, and the second content can be provided by a second external device connected by means of a second interface that is different from the first interface. Therefore, a multi-view screen can be provided swiftly to satisfy the needs of a user.
Patent KR-20220102521-A (KR)
Title: Adhesive film for polarizing plate, polarizing plate comprising the same and optical display apparatus comprising the same
Inventor: LEE SEUNG JUN
IPC: C08F220/34
Filed: 2021-01-13
Abstract: Provided are an adhesive film for a polarizing plate, a polarizing plate comprising the same, and an optical display device comprising the same. The adhesive film for a polarizing plate comprises a (meth)acrylic copolymer having a hydroxyl group and a quaternary ammonium salt. In addition, the adhesive film for a polarizing plate has a glass transition temperature (Tg) of -60 to -10℃ and has a storage modulus (G') of 0.01 to 1.0 MPa at 25℃.
Patent KR-20220103561-A (KR)
Inventor: LEE JIN SIL
IPC: G06Q30/06
Filed: 2021-01-15
Abstract: The present invention relates to a system which allows a user to try virtual fitting for a user's body shape using 3D character modeling technology on a web. According to an embodiment of the present invention, an online fitting system receives body shape information input by a user through the web, generates a 3D avatar based on the information in response to the user's request, stores the 3D avatar in a database, receives and selects products stored in the database, makes the selected products in 3D, renders the products according to a body shape of an avatar, and provides the avatar to a web virtual space in real time. The online fitting system includes: a recommended styling storage unit according to the created avatar; a product storage unit to which styling is applied; and an icon allowing the user to go to buy through them.
Patent KR-20210012018-A (KR)
Title: Resist stripper composition and a method of stripping resist using the same
Inventor: CHOI HAN YOUNG
IPC: G03F7/42
Filed: 2021-01-18
Abstract: The present invention provides a resist stripping solution composition comprising an amide compound represented by chemical formula 2, glycolamine represented by chemical formula 3, and glycol ether represented by chemical formula 4, and a resist stripping method using the same. According to the present invention, the resist stripping solution composition has high polarity, and thus exhibits superior capability of removing a resist pattern transformed by etching.
Patent KR-20220109192-A (KR)
Inventor: HWANG SUK SEUNG
IPC: G01S3/14
Filed: 2021-01-28
Abstract: A satellite communication control apparatus and method are disclosed. The satellite communication control apparatus comprises: a processor; a memory operatively connected to the processor and storing at least one code executed by the processor; and a transceiver interface communicating with a ground control center, wherein the memory can save a code that, when executed through the processor, causes the processor to receive location information of a signal generation device on the ground from the ground control center, calculate an angle of arrival for the target signal from the signal generation device to be received in a satellite based on the location information of the signal generation device and the location information of the ground control center, and form a beam in a direction for detecting the target signal in the satellite based on the angle of arrival. The satellite communication control apparatus enables easy determination of the angle of arrival for the signal on the ground in the satellite.
Patent KR-20220112986-A (KR)
Inventor: PARK JEONG MIN
IPC: H04L9/08
Filed: 2021-02-05
Abstract: The present invention relates to a user voice-based encryption key generation method using an authentication device and an authentication server. The user voice-based encryption key generation method includes: a voice command reception step in which the authentication device receives a voice command from a user; a characteristic vector calculation step in which the authentication device calculates a characteristic vector from the voice command; an encryption key generation step in which the authentication device generates an encryption key for the authentication of the user based on the calculated characteristic vector; and an encryption key processing step in which the authentication device transmits the encryption key to the authentication server. In accordance with the present invention, since an encryption key for user authentication is generated based on content included in a voice command of the user and voice characteristics of the user, the user voice-based encryption key generation method can have an effect of increasing the strength (complexity) of the generated encryption key. Moreover, since an encryption key is generated and stored through a physical duplication prevention method, the user voice-based encryption key generation method can have an effect of considerably enhancing encryption key management security by completely blocking external encryption key hacking.
Patent KR-20220114826-A (KR)
Title: Messenger application that utilizes the SNS automatic response process
Inventor: CHOI SUK JAE
IPC: G06Q50/00
Filed: 2021-02-09
Abstract: The present invention relates to a messenger application, and more particularly, to a messenger application which implements an automatic response process through a tagging function and natural language processing. The messenger application includes an application server (100) that receives a setting value set by a receiver, and provides a service in which a sender terminal (200) and a receiver terminal (300) respond differently to messages from a sender.
Patent KR-20220115314-A (KR)
Title: Walking ability evaluation system for rehabilitation patient with cerebrovascular accident
Inventor: IN TAE SUNG
IPC: A61B5/11
Filed: 2021-02-10
Abstract: The present invention relates to a system for analyzing and evaluating a walking ability of a cerebrovascular patient undergoing rehabilitation, wherein by objectively analyzing and evaluating a level of walking ability from the walking data of the cerebrovascular patient undergoing rehabilitation, enables to monitor a rehabilitation progress of the patient so that a more effective rehabilitation treatment can be realized. The system for evaluating the walking ability comprises: a walking data measuring device; and a walking ability evaluation device.
Patent KR-20220116875-A (KR)
Title: Catalyst for oxygen evolution reaction and method for manufacturing the same
Inventor: LIM EUNHO
IPC: B01J35/00
Filed: 2021-02-16
Abstract: The present invention relates to a catalyst for oxygen evolution represented by chemical formula 1: La_(1-x)M_xNiO_(3-y). In chemical formula 1, M is a noble metal, 0 < x < 1, and 0 < y < 1. An objective of the present invention is to significantly increase the activity of the oxygen evolution reaction by lowering the overvoltage during the oxygen evolution reaction through a metal ion-substituted perovskite oxide catalyst.
Patent KR-20220120211-A (KR)
Title: Drone image analysis system based on deep learning for traffic measurement
Inventor: CHOI SANG IL
IPC: G06T7/70
Filed: 2021-02-23
Abstract: The present invention relates to a drone image analysis system based on deep learning for traffic measurement and, more specifically, to a drone image analysis system based on deep learning for traffic measurement to automatically analyze the flow of road vehicles through object detection of a road situation based on artificial intelligence. The drone image analysis system comprises: an image filming unit which films a road image in real time through a camera attached to a drone; a vehicle detection unit which automatically detects vehicles on the road in the received road image based on deep learning; a distance calculation unit which calculates a movement distance of the detected vehicles by pixel unit; a scale calculation unit which calculates scale information of the image based on lanes on the road in the image with the vehicle detection unit at the same time; and a vehicle speed calculation unit which calculates an actual speed of the vehicles on the road in the image based on the calculated movement distance of the vehicles by pixel unit and the scale information of the image.
Patent KR-20220084968-A (KR)
Inventor: SANGJIN PARK
IPC: F24F8/20
Filed: 2021-02-25
Abstract: 본 발명은 공기청정기에 관한 것으로써, 보다 구체적으로는 외부로 공기를 토출하는 토출부를 포함하는 제1하우징과 외부로부터 공기를 흡입하는 흡입부를 포함하는 제2하우징을 포함하는 하우징, 및 상기 하우징의 내부에 수용되어 공기를 필터링하는 필터부를 포함하는 공기청정기에 관한 것이다. 이때, 상기 제1하우징과 상기 제2하우징은 서로 이격 가능하도록 구비될 수 있으며, 상기 필터부는 상기 제1하우징과 상기 제2하우징 사이의 이격 공간을 통해 교체 가능하도록 구비될 수 있다.
Patent KR-20220122875-A (KR)
Title: Vehicle and control method thereof
Inventor: NAYOUNG KIM
IPC: B60R21/0134
Filed: 2021-02-26
Abstract: The present invention provides a vehicle and a control method thereof for securing safety by controlling a vehicle to prevent an accident when a front view and a side view are not secured in autonomous driving. The vehicle according to one embodiment comprises: a camera obtaining a surrounding image; a sensor module obtaining object information; a communication module communicating with at least one neighboring vehicle; and at least one processor determining a view condition of the vehicle based the surrounding image and the object information and when a view of the vehicle is determined to be obstructed, controlling a speed of the vehicle based a signal received from the at least one neighboring vehicle.
Patent KR-20220123900-A (KR)
Title: System for providing immersive contents and method thereof
Inventor: KIM YOUNG DUCK
IPC: G06T19/00
Filed: 2021-03-02
Abstract: A system for providing immersive content and a method thereof are disclosed. That is, the present invention includes: loading content stored in a terminal; applying a decoration effect according to a user input to the loaded content; synthesizing the content to which the decoration effect is applied and an image obtained by a camera to generate an augmented reality image; and displaying the generated augmented reality image. Thus, it is possible to arouse the curiosity and interest of a user according to the direct experience of the user.
Patent KR-20220125928-A (KR)
Inventor: LEE JU HEE
IPC: H01M4/92
Filed: 2021-03-08
Abstract: Provided are a heat treatment method for a supported catalyst and a supported catalyst prepared thereby. The heat treatment method for a supported catalyst according to the present invention can prevent the growth of catalytic metal particles by repeatedly performing a step of applying heat in a complex manner, such that the method is simpler and more economical than conventional processes. Moreover, a support in the supported catalyst prepared by the method includes a hollow having a predetermined size, such that an electrode manufactured using the supported catalyst can ensure a desired electrode thickness even when used in a relatively small amount compared to the conventional technology. Moreover, water generated during operation of a fuel cell can be efficiently discharged, such that desired mass transfer resistance can be exhibited, and a high electrochemically active surface area (ECSA) and superior catalytic activity can be ensured.
Patent KR-20220126982-A (KR)
Title: Method and device for evaluating product ability for preventing from being stained on mask
Inventor: JANG SUIM
IPC: G01B11/28
Filed: 2021-03-10
Abstract: The present invention relates to a method and a device for evaluating efficacy of preventing mask smearing of a product, comprising steps of: applying a sample of a skin care or makeup product to a subject's face and allowing the same to be absorbed; acquiring an image by taking a picture of an inner surface of the mask, which is a surface in contact with the face, after the subject wears the mask for a predetermined period of time; extracting a specific color from the image and determining a portion where the product is smeared; and comparing the portion where the product is smeared with a portion where the product is not smeared, and calculating the degree of smearing of the product. An objective of the present invention is to satisfy a user's needs in terms of hygiene or aesthetics by numerically calculating and quantitatively evaluating the degree of smearing of the mask through image analysis.
Patent KR-20220128071-A (KR)
Title: Stripper composition
Inventor: PARK JOON HYUN
IPC: C11D11/00
Filed: 2021-03-12
Abstract: The present invention relates to a stripper composition having excellent photoresist stripping performance while suppressing the corrosion of a metal substrate. According to the stripper composition of the present invention, provided is a composition having excellent photoresist stripping performance while suppressing the corrosion of a substrate. Specifically, the exfoliation properties can be improved by controlling the conductivity of a stripper to suppress corrosion caused by a galvanic phenomenon.
Patent KR-20220130338-A (KR)
Title: System-level prognostics apparatus and method thereof
Inventor: CHOI JOO HO
IPC: G05B23/02
Filed: 2021-03-18
Abstract: The present invention relates to an apparatus and method for predicting a system level and, more specifically, to an apparatus and method for predicting a system level, which can apply at least one between an approach method based on physics constructing a system and an approach method based on data and can predict a health state of a physical component and a system health state at a system viewpoint and predict a residual life by complexly considering both the health state of each physical component and the health state of a system level.
Patent KR-20220132114-A (KR)
Title: Image processing method using neural network based on unsupervised learning for fourier phase retrieval and apparatus therefor
Inventor: YE JONGCHUL
IPC: G06N3/08
Filed: 2021-03-23
Abstract: Disclosed are an image processing method and device using unsupervised learning-based neural network for Fourier phase restoration. According to an embodiment of the present invention, the image processing method includes the steps of: receiving Fourier magnitude data in a Fourier space of an input image; and reconstructing an output image of the input image based on the Fourier magnitude data and phase information by extracting the phase information for the Fourier magnitude data using a first neural network learned based on unsupervised learning.
Patent KR-20220133048-A (KR)
Title: System and method for self diagnosis of power facilities
Inventor: KIM SOON TAE
IPC: G01R31/12
Filed: 2021-03-24
Abstract: Disclosed are a power device self-diagnosis system and a method thereof. According to one aspect of the present invention, the power device self-diagnosis system comprises: a self-diagnosis device installed in each power device, detecting sensing data of the power device, and diagnosing a state of the power device by analyzing the detected sensing data of the power device; and a remote monitoring and control device for collecting a state diagnosis result of the power device from the self-diagnosis device, and outputting the collected state diagnosis result of the power device. The self-diagnosis device includes: a sensor unit installed in the power device, and sensing the sensing data of the power device; a communication unit; an output unit; and a control unit for receiving the sensing data of the power device from the sensor unit, diagnosing the state of the power device by analyzing the sensing data of the power device, outputting the state diagnosis result of the power device through the output unit, and transmitting the state diagnosis result of the power device to the remote monitoring and control device through the output unit. Therefore, damage to a device enclosure can be prevented.
Patent KR-20220141202-A (KR)
Inventor: CHO YOUNG RAE
IPC: E04B1/76
Filed: 2021-04-12
Abstract: Provided is a non-welded truss joint structure with improved heat insulation and durability, in which an anchor (embedded bracket) and a truss can be fastened without welding and, at the same time, structural stability and insulation can be secured. The non-welded truss joint structure comprises an embedded bracket inserted into a building structure; an angle fastened to the front of the embedded bracket; a main structure truss fastened to the front of the angle; an auxiliary structure truss fastened to the side of the main structure truss; and an exterior material fastened to the front of the main and auxiliary structure trusses, wherein an insulation gasket is interposed between the embedded bracket and the angle and at least a part of the main structure truss is accommodated in a space provided in the angle.
Patent KR-20220142290-A (KR)
Inventor: CHOI HYUNSEOK
IPC: H03F1/56
Filed: 2021-04-14
Abstract: According to various embodiments, a power amplification circuit, which can maintain an optimized impedance, may comprise: a power divider which receives a radio frequency (RF) signal and outputs a first RF signal and a second RF signal; a first power amplifier which receives the first RF signal output from the power divider and amplifies the first RF signal on the basis of a first bias; a second power amplifier which receives the second RF signal output from the power divider and amplifies the second RF signal on the basis of a second bias; an impedance matching circuit which receives the first RF signal amplified by the first power amplifier and the second RF signal amplified by the second power amplifier; a first impedance conversion circuit disposed between the first power amplifier and the impedance matching circuit; and an impedance variable circuit which is electrically connected between the second power amplifier and the impedance matching circuit, and which has an impedance that changes on the basis of the frequency of the RF signal and the power of the RF signal. Various other embodiments may also be possible.