baber/WOPTO huggingface dataset:
Patent KR-20010022528-A (KR)
Title: 구리 및 구리 합금으로 이루어진 용접 파이프 제조 방법
IPC: B21C37/06
Filed: 1998-07-01
Abstract: 초기 재료 주조 설비, 열간 압연기, 파이프 성형 및 용접기, 그리고 용접 파이프용 인발 장치(drawing device for the welded pipe)로 구성된 복합적 생산 라인(combined production line)에서 구리 및 구리 합금으로 이루어진 파이프 제조 방법에 있어서, 
     a)  연속적인 일차 스트립(initial strip)을 주조하는 단계, 
     b)  상기 주조된 일차 스트립을 소정 압연 속도(= 주조 속도 × 45 내지 200mm 사이의 폭과 10 내지 70mm 사이의 두께의 측정 영역을 갖는 중간 스트립(intermediate strip)으로 형성하기 위한 신장량)에서 열간 압연하는 단계, 
     c)  중간 스트립을 100℃ 이하의 실온(room temperature)까지 냉각하며, 중간 스트립 표면에서 스케일을 제거하는 단계, 
     d)  상기 중간 스트립을 스트립으로 냉간 압연하는 단계, 
     e)  트림밍 되지 않은(untrimmed) 스트립을 소정 중량을 가진 묶음(bundle)으로 코일링(coiling)하는 단계, 
     f)  상기 코일된 스트립을 풀어서 종방향 이음매 파이프로 성형하는 단계, 
     g)  상기 종방향 이음매 부분을 용접하여 용접 파이프(longitudinally welded pipe)로 만드는 단계, 
     h)  필요한 경우, 상기 파이프의 외부 및 내부를 다듬는(de-burring) 단계, 
     i)  곧바로 이어서 또는 중간 저장소 이후에 이루어지는 최종 작업 단계 이전의 규격 측정(calibration) 단계, 
     j)  상기 용접 파이프가 미완성인 경우, 상기 용접 파이프를 적어도 하나의 인발 공정에서 최종 파이프로 인발하는 단계 
     를 포함하고, 
     상기 단계 a) 내지 단계 e)는 온라인 공정(on-line process)에서 이루어지고, 상기 단계 f) 내지 단계 j)는 단계 e) 이후에 곧바로, 또는 중간 저장 이후의 후속적인 작업 단계로서 실행된다.
Patent KR-20010023691-A (KR)
Title: 감압성 접착제 저장층 및 단일방향성 탄성 백킹층을 갖춘경피 치료 시스템
IPC: A61P29/02
Filed: 1998-08-21
Abstract: 본 발명은 경피 치료 시스템, 특히 특히 재분리가능한 보호층, 감압성 접착제 저장층 및 감압성 접착제가 코팅되거나 코팅되지 않으며, 탄성률이 20% 이상인 단일방향성, 바람직하게는 세로방향성 탄성 재료로 된 백킹층을 구비하는 활성물질 패치인 것을 특징으로 하는 경피 치료 시스템을 제공한다.
Patent KR-20010031222-A (KR)
Title: 트랜스코딩 방법 및 장치
IPC: H04N7/26
Filed: 1998-11-27
Abstract: 본 발명은 트랜스코더에 관한 것으로, 상기 트랜스코더는 운동 보상을 이용하는 제 1 코딩구성에 따라 코딩되고, 코딩된 데이터 및 운동 보상정보를 전달하는 수신된 비디오신호를 디코딩하는 디코더, 및 운동 보상을 이용하는 제 2 코딩구성에 따라 디코더의 출력을 인코딩하는 인코더를 가지고, 수신된 신호내에서 비디오신호의 적어도 하나의 다른 프레임을 수반하는 벡터를 이용하여 상기 비디오 신호의 현재 프레임을 위한 추정된 모션 벡터를 생성하며, 이들은 인코더에 의해 직접적으로 사용되거나, 또는 운동 추정을 위한 탐색영역을 한정하기 위해 사용될 수도 있는 것을 특징으로 한다.
Patent KR-20010032165-A (KR)
Title: 주파수 옵셋 추정 장치 및 방법
IPC: H04B17/00
Filed: 1998-11-13
Abstract: 최소한 하나 이상의 전송기와 최소한 하나 이상의 수신기를 포함하는 통신시스템에 있어서, 상기 전송기의 반송파 주파수와 상기 수신기의 국부 주파수 기준(local frequency reference)간의 주파수 옵셋이 추정된다.  전송기에 의해 전송되고 수신기에 의해 검출된 주파수 동기 신호의 연속적으로 수집된 샘플간 위상 차이가 계산된다.  상기 위상 차이는 누적 위상차(accumulated phase differences)에 합산된다.  M개의 누적 위상차(M accumulated phase differences)가 계산될때까지, 연속적으로 수집된 샘플들간의 위상차이가 계산되고, 누적 위상차에 합산된다.  M개의 위상 차이의 합산값은 덤프되어(dumped), 0 누적 위상차(zero accumulated phase differences)를 만든다.  M개의 위상 차이의 N 개의 합산값들이 덤프될때까지, 연속적으로 수집된 샘플들간의 위상 차이는 계산되고, 상기 위상 차이는 누적 위상차에 합산되고, M개의 위상차이의 상기 합산 값은 덤프된다.  상기 M개의 위상차이의 상기 N개의 합산값은 상기 추정 주파수 옵셋을 생성하기 위해 합산된다.
Patent KR-20010041375-A (KR)
Title: 폴리아미드 입자의 추출 방법
IPC: C08G69/28
Filed: 1999-02-19
Abstract: 본 발명은 폴리아미드 입자 또는 폴리아미드를 함유하는 중합체 입자를 수성 추출제로 추출하기 위한 방법에 관한 것이다.  본 발명에 따라, 아미노니트릴, 및 폴리아미드를 형성하는 임의의 추가의 단량체 또는 폴리아미드를 형성하는 임의의 추가의 올리고머, 또는 이들의 혼합물의 수용액을 수성 추출제로서 사용한다.
Patent KR-20010042446-A (KR)
Title: 유리제조용 원료를 생산하는 방법
IPC: C03B5/18
Filed: 2000-02-02
Abstract: 본 발명은, Na, K와 같은 알칼리 금속 및/또는 MgO, CaO와 같은 알칼리토금속 및/또는 Ce와 같은 희토류(rare earths)의 규산염(들)에 기초한 화합물을, 선택적으로는 상기 물질을 결합시키는 혼합 규산염의 형태로, 실리카(silica) 및 할로겐화물(halides), 특히 NaCl, KCl 또는 CeCl 4 와 같은 상기 알칼리 금속 및/또는 상기 희토류 및/또는 상기 알칼리토금속의 염화물(들), 또는 황산염(sulfates) 또는 질산염(nitrates)을 변환시켜서 제조하는 방법에 관한 것이다. 
     상기 변환에 필요한 열 공급은 적어도 부분적으로 침수식 버너(immersed burner) 또는 버너들에 의해 제공된다. 본 발명은 또한 실행 장치와 이것의 사용에 관한 것이다.
Patent KR-20010071259-A (KR)
IPC: H01L21/768
Filed: 2000-03-15
Abstract: 본 발명은 반도체(10)의 컨택트 저항을 감소시키는 방법에 관한 것이다.  높은 선택성의 0.25 마이크론 이하 컨택트 홀 에칭 동안의 플루오르화탄소 플라즈마의 사용에 있어서, 실리콘 이산화물(SiO 2 )/실리콘 질화물(Si 3 N 4 )/실리사이드(TiSi x ) 층의 경우, 중합 효과(polymerization effects)가 결정적이라는 것을 알게되었다.  이 공정은 먼저 SiO 2 를 제거하기 위해 높은 에칭 선택 화학제를 이용하며, 이후에 Si 3 N 4 -대-TiSi x 의 높은 선택도를 갖는 또 다른 화학제로 교체하는 단계를 포함한다.  이것으로 인해 컨택트 홀 측벽 및 바닥에 쉽게 점착하는 반응성 불포화 중합체(30)가 형성된다.  불포화(30)로부터의 플루오르는 Si 3 N 4 -대-TiSi x 의 에칭 선택도를 심하게 떨어뜨린다는 것을 알게되었다.  Si 3 N 4 -대-TiSi x 의 에칭 선택도를 복원하기 위해 산화물 대 질화물의 임의의 고도의 선택적 에칭에 도포될 수 있는 상이한 중합체(30) 제거 방법이 제공된다.
Patent KR-20010092665-A (KR)
Title: Method and system for providing business for sound of music using internet
Inventor: PARK GWANG SOO
IPC: G06Q50/10
Filed: 2001-01-17
Abstract: PURPOSE: A method and system for selling digital music is provided to sell the music on a web site, collect, manage and listen to the sold music on the web site. The digital music has a background moving picture. CONSTITUTION: A system for selling digital music is comprised of a music database(102), a member information database(106), a member studio database(108), a web server system(110), and a mobile communication network(118). The web server system(110) is connected with a plurality of wired clients(120/1-120/n) through a network(100). Also the web server system(110) is connected with a plurality of mobile clients(122/1-122/n) and the mobile communication network(118). The music database(102) stores a plurality of digital music data compressed in an MPEG compression algorithm. The member information database(106) stores member information for wired or mobile clients registered in the web server system(110) as a member. The member studio database(108) provides a member studio space to be allocated to the registered clients.
Patent KR-20020066786-A (KR)
Inventor: LEE BO YOUNG
IPC: B23K35/04
Filed: 2001-02-13
Abstract: PURPOSE: A high efficiency shielded metal arc welding electrode is provided, which has increased current density by forming grooves on the inner surface thereof. CONSTITUTION: The high efficiency shielded metal arc welding electrode is characterized in that U-shaped grooves or V-shaped grooves are formed in longitudinal direction of the shielded metal arc welding electrode to increase the specific surface area thereof.
Patent KR-20020068149-A (KR)
Title: A system for controlling play information of multimedia contents and a method thereof
Inventor: KIM JONG U
IPC: G06F17/00
Filed: 2001-02-20
Abstract: PURPOSE: A multimedia contents screening information control system and a method for the same are provided to support searching the contents, designating the screening time, proving the search result as the user desires. CONSTITUTION: The system(100) contains the screening information formation table(102), which is made out as a default web page to be viewed on web-browser. The table can be an OSD(On Screen Display) screen. The table contains screening date, URL and other information. The system also contains screening information operating module(104), a robot operating module(110), multimedia contents information DB(108), and DB operating module(106). The screening information operating module searches the users' desirable contents and marks them to distinguish whether the contents is able to be screened or not. The robot operating module collects multimedia contents and provides the list of them to the users. The system can store some contents in DB to screen some contents at high-speed. When a user inputs the search parameters, the robot agent searches the appropriate contents and reflects the search result in the contents information DB. As the same procedure, the web page table is updated. The system can be adapted in the digital broadcasting systems.
Patent KR-20020071642-A (KR)
Title: Backlight and method for manufacturing the same
Inventor: SON SEOK MIN
IPC: G02F1/13357
Filed: 2001-03-07
Abstract: PURPOSE: A backlight and a method for manufacturing the same are provided to remove the inverter for high voltage driving by using light emitting diodes instead of a cold cathode ray tube, thereby reducing the manufacturing cost and the power consumption for a longer period use. CONSTITUTION: A backlight includes an LCD array(31) formed of a plurality of light emitting diodes for generating ultraviolet rays, a fluorescent layer(33) formed on a light emitting surface of the LED array for generating visible rays, and an LED housing(30) for fixing the fluorescent layer and the LED array, wherein a first epoxy resin(32) is provided between the LED array and the fluorescent layer and a second epoxy resin(34) is provided to the surface of the fluorescent layer.
Patent KR-20010069322-A (KR)
Title: An electric auction method using PDA or IMT2000
Inventor: AHN DO HUN
Filed: 2001-03-08
Abstract: PURPOSE: An electronic auction method using a PDA(Personal Digital Assistant) or IMT 2000 is provided to exchange information at high speed and to exchange information at a comparative remote place from a server stably by mounting a wireless LAN card. CONSTITUTION: A forwarder inputs a commodity list, an amount, the place of origin, and a forwarding suggestion price in a database server of an auction company through a picking system using an intranet or the Internet, and an auction commodity is registered. A bidder connects to an electronic auction server using a mobile PDA(personal digital assistant) mounting a wireless LAN card having an OS and a web browser or an IMT 2000(international mobile telecommunication 2000) and bids to an auction in real time and confirms a successful bid. An auction company progresses the auction through a mobile or fixed auction plate sharing information with a database server and an electronic auction server and decides a successful bid.
Patent KR-20020073800-A (KR)
Title: Error sensing device of magnet driver
Inventor: KIM NAM HEON
IPC: H01L21/00
Filed: 2001-03-16
Abstract: PURPOSE: An error detection apparatus of a magnet driver is provided to reduce errors generated from a manufacturing process by detecting GAUSS generated from a plurality of magnet drivers. CONSTITUTION: A three phase power supply portion(20) applies three phase AC(Alternating Current) power of 208V to the first and the second magnet driver(22,24). The first and the second magnet driver(22,24) output AC power to drive a magnet coil(30). The first and the second magnet driver(22,24) generate GAUSS when receiving a GAUSS generation signal. The first and the second GAUSS detection sensor(26,28) detect the GAUSS generated from the first and the second magnet driver(22,24). Accordingly, a chamber is stopped by an error signal if the GAUSS is not generated from the first and the second magnet driver(22,24).
Patent KR-20010074130-A (KR)
Title: automatic handling system and method in the internet trade business
Inventor: JUNG I YOUNG
IPC: G06Q99/00
Filed: 2001-03-30
Abstract: PURPOSE: A system and a method for automatically processing data of an Internet trade is provided to extract information and data necessary to a buyer and a seller automatically and to connect data necessary interactively automatically and to transmit an offer sheet and necessary data to a buyer and a seller automatically. CONSTITUTION: Data requested by a buyer and a seller are analyzed, classified, extracted, processed, and stored through a main controller(11). The data requested by a buyer and a seller from the main controller(11) are linked to a domestic and foreign web site(14) and checks whether the data is duplicated with data being stored in a data recording device and stores the checked data in the data recording device. The demand information and the stored data are compared and searched, and the matched data are connected as one-to-one or one-to-multi through a matching system device(12). The matched data are checked and selected, and an E-offer sheet is prepared for one-to-one or one-to-multi buyer and seller through an E-offer sheet operating system(13). The prepared E-offer sheet is transmitted to one-to-one or one-to-multi through a transmitting system device(15).
Patent KR-20010069506-A (KR)
Inventor: KIM JOO CHUL
IPC: G06Q50/26
Filed: 2001-04-06
Abstract: PURPOSE: A system for preparing all sorts of registration application form using the Internet is provided to reduce a cost and a time for a registration by performing an application of a registration by a concerned person directly without through an agent and for a concerned person to receive a registration application form at low price through the Internet. CONSTITUTION: Necessary information is inputted and outputted for a member to receive a completely prepared all sorts of registration application forms. The information is inputted not only through the Internet but also through a telephone, a facsimile, and a mail for preparing a registration application form. The prepared registration application form may be outputted by a printer through an applicant PC. An applicant may transmit the prepared registration application form through a facsimile, E-mail or a mail service.
Patent KR-20010074200-A (KR)
Title: Manufacturing of Cerium Oxide Nanoparticles Using Chelating Agents in Solution
Inventor: KIM SANG GYUN
IPC: C01F17/00
Filed: 2001-04-09
Abstract: PURPOSE: A method for preparing cerium(II) oxides-fine granules is provided to obtain the granules having less than 100 nm of diameter and uniform distribution of particle size useable to effect as catalyst or polishing material. CONSTITUTION: The method comprises the following steps of adding a chelating agent into a water solution to prepare the first solution(I); dissolving salts such as Ce(NO3)3 or Ce(NO3)4·2NH4NO3 in water to prepare the second solution(II); blending both of the first(I) and second(II) solutions to generate cerium ions and form ligands; producing a precipitate by adding determined amount of organic solvent; and heat-treating the precipitate to produce fine cerium oxide granules having less than 100nm of diameter and in the spherical form. The chelating agent is ammonium acetate or propionate ammonium salt alone and/or in combination with two compounds.
Patent KR-20020082909-A (KR)
Title: Method for manufacturing liquor matured in a bamboo tube
Inventor: JO SU YEON
IPC: C12G3/02
Filed: 2001-04-24
Abstract: PURPOSE: A method for producing wine aged in a bamboo cask is provided, thereby producing high quality of wine having bamboo taste. CONSTITUTION: The method for producing wine aged in a bamboo cask comprises the steps of: cutting and drying bamboo to produce a bamboo cask; inserting the dried bamboo cask into a vacuum vessel(30) and sealing the vacuum vessel(30) with a cover(31); reducing the pressure of the vacuum vessel(30) and the bamboo cask by operation of a vacuum valve(40) connected to a vacuum pump(20) which is installed in one side of the vacuum vessel(30); inserting herbal medicines mixed wine into a wine storing vessel(60); closing the vacuum valve(40) and opening an inlet valve(80) which is installed in one side of the vacuum valve(40) to transport wine(70) in the wine storing vessel(60) to the vacuum vessel(30) through the fiber tissue in the top and bottom of the bamboo cask; removing the vacuum vessel(30) from the bamboo cask; and drying and aging the wine(70) in the bamboo cask.
Patent KR-20020085127-A (KR)
Title: A table having a function of picture frame
Inventor: JANG SANG HO
IPC: A47B13/00
Filed: 2001-05-04
Abstract: PURPOSE: A table, which also serves as a picture frame, is provided to extend a use range of the table by allowing the table to be hung on the wall surface of a house as a decorative picture frame usually. CONSTITUTION: The table, which also serves as a picture frame, comprises a framework(1) having a certain shape; a picture frame part penetrating the front center part of the framework, a raised holding portion(21) formed with a first inclined surface being protruded from the picture frame; an adhesive(25) applied to the holding portion of the picture frame part; a transparent plate(22) disposed and fixed on the adhesive applied on the holding portion; a fixing panel(23) fixed to the rear surface of the framework to define a certain space(24) as thick as the holding portion; and a rear panel fixed to the rear surface of the framework and being formed with a penetrating groove, table leg insertion grooves and a nail groove.
Patent KR-20010103647-A (KR)
IPC: D05B69/30
Filed: 2001-05-07
Abstract: 스텝핑모터의 탈조에 의한 바늘진동장치의 오버런을 방지할 수 있는 바늘진동장치를 제공하는 것을 그 과제로 한다. 
     이를 해결하기 위한 수단으로 바늘봉(14)을 상하이동가능하게 지지하는 바늘봉 지지대(20)와, 정역 중 어느 한 방향으로도 간헐회동가능하게 또한 회전각도 제어가능한 바늘진동모터(4)와, 일단이 바늘봉 지지대에 고정되어 천이송방향과 직교하는 방향으로 이동가능하게 지지된 바늘진동 구동축(24)과, 바늘진동모터와 바늘진동 구동축의 타단을 연결하는 연결부재(22)(26)(30)와, 바늘진동 구동축으로 래디얼방향으로 압착력을 부여하는 압착력 부여수단(42)(48)(50)(52)을 구비한다.
Patent KR-20020089741-A (KR)
Title: Method for allocating link capacity in virtual private networks
Inventor: CHOI IN SU
IPC: H04L12/28
Filed: 2001-05-24
Abstract: PURPOSE: A method of assigning a link capacity in a VPN(Virtual Private Network) is provided to request reassignment from a manager by a VPN subscriber when transmissions are congested or transmissions are reduced in a VPN, in order to dynamically control a capacity of a virtual link, thereby obtaining economical benefits. CONSTITUTION: A VPN manager is assigned with an initial link capacity(CI) from a basic communication network manager while setting up a virtual link(S1). The VPN manager operates a self-subscribed VPN with the initial link capacity(CI)(S2). If a request of changing a capacity of the virtual link is generated owing to increased or reduced transmissions, the VPN manager compares a demanded link capacity(SI) with the initial link capacity(CI)(S3). If the demanded link capacity(SI) is smaller than the initial link capacity(CI), the VPN manager requests the demanded link capacity(SI)(S4), and is assigned with the first changing link capacity(RI1) having the same size as the demanded link capacity(SI)(S5).
Patent KR-20010070735-A (KR)
Title: Integrated shopping mileage system based on on-line purchasing information
Inventor: LEE JIN HWAN
Filed: 2001-06-04
Abstract: PURPOSE: A system for integrating shopping mileages based on on-line purchasing information is provided to enable a purchaser or a seller to make a profit by enabling a purchaser to pay the price for a product, by enabling an operator to integrate mileages provided from a seller according that, and by enabling the purchaser to construct the purchaser's shopping mall. CONSTITUTION: A purchaser(100) purchases a product on line. A seller(300) sells a product and provides mileages. An operator(200) accepts the purchaser(100) and the seller(300) as a member. In addition, the operator(200) arrays the seller(300) according to determined classification standards. The operator(200) enables the purchaser(200) to easily purchase a product and unitedly manages the mileages provided from the seller(300).
Patent KR-20020097466-A (KR)
Title: A motor support structure of air conditioner
Inventor: HONG CHANG YONG
IPC: F24F1/00
Filed: 2001-06-21
Abstract: PURPOSE: A motor support structure for air conditioner is provided to prevent load of motor from being directly applied to the fan housing, while preventing vibration of motor from being transferred to the fan housing. CONSTITUTION: A motor support structure for air conditioner, comprises a motor(60) for providing, through a belt(56), rotation force to a shaft(54) of a blower fan(52) arranged within a cabinet(50); and a mount unit(80) installed to the cabinet so that the motor is supported by the cabinet. The mount unit includes a motor holder(82) for holding the motor; and a holder guide(90) arranged to be inclined within the cabinet and attached to the motor holder through a bolt(102) and a nut(103), in such a manner that the spacing between the shaft of the blower fan and a shaft(62) of the motor is controlled by the movement of the motor holder.
Patent KR-20030000508-A (KR)
Title: Protection net welding structure of flexible tube for springkler and the welding method for the same
Inventor: CHOI JIN RIM
IPC: F16L11/115
Filed: 2001-06-25
Abstract: PURPOSE: A coupling structure and a coupling method for a protection mesh of a flexible tube are provided to simplify manufacturing processes and to reduce manufacturing cost by simultaneously performing a heat treating process and a welding process. CONSTITUTION: A flexible tube(50) is covered with a cylindrical protection mesh(60). Both ends of the cylindrical protection mesh(60) extend to a straight pipe member(51). Then, the both ends of the cylindrical protection mesh(60) are closely adjacent to the straight pipe member(51) of the flexible tube(50). A solder(80) is coated at an end of the cylindrical protection mesh(60). In order to remove stress generated when forming the flexible tube(50), a thermal treating process is carried out at the temperature of 1000 to 1200°C. Then, the flexible tube(50) is welded to the cylindrical protection mesh(60). After that, a rigid line wound around the end of the cylindrical protection mesh(60) is released.
Patent KR-20030001892-A (KR)
Title: gas identification device
Inventor: HAN MIN SU
IPC: G01N21/00
Filed: 2001-06-28
Abstract: PURPOSE: A gas identifier is provided to analyze the type and density of gas when two or more gases coexist, while reducing cost for gas analysis. CONSTITUTION: A gas identifier comprises a cell(20) for storing a gas specimen; a light source(10) for selectively irradiating a specific wavelength to the gas specimen; a microphone(22) arranged at the cell, which senses the movement of pressure caused when the gas specimen absorbs energy from the light scanned from the light source and converts the sensed movement into an electrical signal; a database(60) for storing signal patterns for cases where a wide variety of gases are mixed; and an arithmetic operation unit(50) for comparing the signal input from the microphone with the signal pattern stored in the database. The light source includes a plurality of laser diodes for generating light of different wavelengths, and a light source assembly for supporting laser diodes. The light source selects light to be irradiated to the gas specimen, by moving the position of laser diodes.
Patent KR-20030003456-A (KR)
Title: Cutting insert for processing of turning
Inventor: KIM HAK GYU
IPC: B23B27/22
Filed: 2001-07-02
Abstract: PURPOSE: A cutting insert used in a turning process is provided to expand the life span of the cutting insert, to stably cut chips and to improve strength of the cutting insert by forming a protrusion at an edge of the cutting insert. CONSTITUTION: A cutting insert includes an upper surface(300), a lower surface, a plurality of lateral surfaces, a plurality of edges, edge cutting sections(320) and an opening section(120) formed at a center of the cutting insert. The upper surface(300) of the cutting insert includes edge protrusions(350) and a chip braker(200). The edge protrusions(350) extend from the edge cutting sections towards a center of the cutting insert. The chip braker(200) includes a lower chip braker(230) positioned lower than the edge cutting sections and an upper chip braker(220) positioned higher than the edge cutting section.
Patent KR-20030003602-A (KR)
Title: Microstrip antenna using piezoelectric element
Inventor: SONG JUN TAE
IPC: H01Q13/08
Filed: 2001-07-03
Abstract: PURPOSE: A micro-strip antenna using a piezoelectric element is provided to control a frequency band by applying an external electrical field to an antenna without applying physical deformation of the antenna. CONSTITUTION: An earth plate(100) is formed on an upper face of a lower substrate(110). A patch(120) is formed on a bottom face of an upper substrate(130). A plurality of piezoelectric elements(140) are installed between the lower substrate(110) and the upper substrate(130). The patch(130) and the earth plate(100) are formed with thin copper plates. An air layer is formed between the patch(130) and the earth plate(100). The thickness of the air layer is 0.4 to 0.6mm. The upper substrate(130) and the lower substrate(110) have thickness of 4 to 6mm. The piezoelectric elements(140) are formed with Pb(Zr,Ti)O3. An electrode(145) is formed on an upper portion and a lower portion of the piezoelectric element(140).