Abstract:
PURPOSE: A small near-field RFID reader antenna is provided to reduce the size of a near-field RFID reader antenna by locating a short pin in the end of a feeding unit to locate a slot near a short location. CONSTITUTION: A slot(23) is formed on a ground surface(22) of a single dielectric(21). A micro strip line(24) is formed on the surface except the ground surface of the single dielectric. The micro strip line functions as a feeding line to supply power to the slot. A short pin(25) shorts the end of the micro strip line on the ground surface. The end of the micro strip line passes through the dielectric by the short pin.
Abstract:
A compact broadband RFID tag antenna is provided to obtain a resonant frequency by controlling an interval between a feeding unit and a radiating unit, the thickness of the feeding unit, and a radius of the radiating unit. A compact broadband RFID tag antenna includes a feeding unit(110), an RFID tag chip(130), and a radiating unit(120). The feeding unit rectifies the electronic wave transmitted from the reader and obtains the operation power. The feeding unit supplies the operation power to the radiating unit. The feeding unit has a gap for receiving the RFID tag chip. The radiating unit is formed in the same plane as the feeding unit. The radiating unit obtains the electronic wave from the reader. The radiating unit radiates the electronic wave by the operation power received from the feeding unit. The interval of the radiating unit and the feeding unit is thicker 5 to 30 times than the line thickness of the feeding unit.
Abstract:
A novel compact tunable resonator based on a varactor-loaded complementary split-ring resonator is provided to realize a micro variable microwave device by realizing a variable resonator with a VLCSRR(Varactor-Loaded Complementary Split-Ring Resonator) resonator. In a novel compact tunable resonator based on a varactor-loaded complementary split-ring resonator, a variable resonator substrate(100) using complementary split-ring resonator having a varator diode includes an internal split ring slot(110), an outer split ring slot(120), and a varator didoe(Dv). A metallic film is formed in a substrate, and an internal split ring slot is formed by using a nonmetallic material in the top of the substrate. An external split ring slot is formed with being separate from an internal split ring slot by a certain space. An external split ring slot is formed with a non-metal material.
Abstract:
Disclosed is a multiple-input multiple-output (MIMO) system design method using a decoupling network. The MIMO system design method using a decoupling network comprises the following steps of: a step before a process for designing an arbitrary MIMO antenna in order to secure broadband separation, extracting a parallel resonance occurring spot from the MIMO antenna, calculating a length range of a transmission line respectively connected to the MIMO antenna, and calculating parameters of the MIMO antenna satisfying a length parameter of the transmission line and a decoupling requirement about the length parameter in order to make the parallel resonance occurring spot be in center frequency; a first process step for printing the layout of the MIMO antenna with corrected parameters on a printed circuit board; a second process step for printing the calculated transmission line in the MIMO antenna and removing reciprocal-admittance using a lumped element; a third process step for performing broadband impedance matching in first and second terminals connected with the transmission line. [Reference numerals] (AA) Start;(BB) End;(S110) Step before a process for designing an arbitrary MIMO antenna in order to secure broadband separation, extracting a parallel resonance occurring spot from the MIMO antenna and calculating a length parameter of the transmission line in order to make the parallel resonance occurring spot be in center frequency and parameters of the MIMO antenna satisfying a decoupling requirement about the length parameter;(S120) First process step for printing the layout of the MIMO antenna with corrected parameters on a printed circuit board;(S130) Second process step for printing the transmission line having the extracted length in the MIMO antenna on the printed circuit board substrate and removing reciprocal-admittance using a lumped element;(S140) Third process step for performing broadband impedance matching in first and second terminals connected with the transmission line
Abstract:
PURPOSE: A radome-antenna assembly for compensating for the insertion phase delay of a phase array antenna and a method for compensating for insertion phase delay using the same are provided to locally control the speed of an electromagnetic wave which passes through a radome by controlling the dielectric constant of a dielectric substance inside the radome. CONSTITUTION: A radome(100) is composed of ferroelectrics for controlling a dielectric constant according to the change of electrical energy. A phase array antenna is composed of a plurality of radiation elements(200). The variation of IPD(Insertion Phase Delay) is inevitably generated in a curved face of a radome. The dielectric constant of the ferroelectrics is controlled along the curved face of the radome. A progressive speed of an electromagnetic wave is controlled by controlling the dielectric constant of the ferroelectrics. The phase of a beam received to each radiation element of an antenna is controlled by controlling the progressive speed of the electromagnetic wave.
Abstract:
본 발명은 버랙터 다이오드를 장착한 상보적 구조의 스플릿 링 공진기를 이용한 가변형 공진기에 관한 것으로, 본 발명에 따른 버랙터 다이오드를 장착한 상보적 구조의 SRR을 이용한 가변형 공진기는 전파 전송을 위한 마이크로스트립 또는 CPW 전송선 또는 안테나 안에 스플릿 링 공진기(SRR) 모양의 슬롯을 낸 상보적 구조의 스플릿 링 공진기(CSRR, Complementary SRR) 구조에 버랙터 다이오드를 장착함을 특징으로 하며, 발명자들에 의해 VLCSRR (Varactor-Loaded CSRR) 이라고 명명하기로 한다. 이러한 본 발명은 마이크로웨이브의 여러 디바이스에 적용하여 사용함으로써 디바이스의 사이즈를 작게 할 수 있게 하며, 또한 목표 주파수를 선택적으로 정할 수 있게 한다. VLCSRR, CSRR, Varactor-loaded, 공진기, 가변형 공진기,
Abstract:
본 발명은 초소형 광대역 RFID 태그 안테나, 보다 상세하게는 기존의 라벨형 태그 안테나들이 가졌던 반파장 크기의 한계를 극복하기 위해서 변형된 스플릿 링 공진기(Split Ring Resonator) 구조를 이용한 초소형 광대역 RFID 태그 안테나에 관한 것으로써, 본 발명에 따른 초소형 광대역 RFID 태그 안테나는, 리더기로부터 송출된 전자파를 정류하여 동작 전원을 얻고, 상기 동작 전원을 방사부로 공급하며, RFID 태그 칩을 수용하기 위한 갭이 형성된 링으로 이루어진 급전부; 상기 급전부에 형성된 갭에 위치한 RFID 태그 칩; 상기 급전부와 이격되어 그 외부의 동심 평면 상에 형성되어, 상기 리더기로부터 송출된 전자파를 획득하고 상기 급전부로부터 동작 전원을 공급받아 전자파를 방사하며, 사용하고자 하는 RFID 주파수 대역의 전기적 반파장 길이를 가지는 방사부를 포함하는 것을 특징으로 한다. RFID 태그 안테나, Split Ring Resonator
Abstract:
A micro type band stop filter is provided to improve a skirt property by improving a frequency stop property and a frequency pass property. A spiral resonator(10b) includes a dielectric substrate(13b), a first metal substrate(11b), and a second metal substrate(15b). The first metal substrate is laminated on one surface of the dielectric substrate into a spiral shape. The second metal substrate is laminated on the other surface of the dielectric substrate. A power source is formed on a parallel surface about the first metal substrate, is formed into a vertical direction of the first metal substrate, and forms an electric field which is changed according to a time. An input transmission line is connected to one side of the spiral resonator. A frequency is inputted in the input transmission line. An output transmission line is connected to the other side of the spiral resonator. A frequency is outputted in the output transmission line through the spiral resonator.
Abstract:
본 발명은 Double-PIFA 구조의 광대역 RFID 태그 안테나에 관한 것으로서, 단부가 단락되도록 꺾인 전송선로로 근접 결합 급전 구조를 이용하여 급전부를 형성시킴으로써, 임피던스의 정합이 용이하고, Double-PIFA(Planar Inverted-F Antenna)구조의 방사부는 1/8 파장의 크기로 금속위에 방사 패치층이 형성됨으로써 금속부착이 가능하고 소형화가 가능한 구조이며, 입력 리액턴스 특성은 급전부의 길이 또는 주 급전부와 부 급전부 사이의 폭을 조절함으로써, 입력 저항 특성은 급전부와 방사 패치 사이의 거리를 조절함으로써 용이하게 조정가능하고, 금속 표면에 부착되더라도 공진 주파수가 일정하여 산업화가 가능하며, 북미의 RFID 주파수 대역인 902MHz~928MHz에서 동작하는 광대역 RFID 태그 안테나를 제공하기 위한 것으로서, 그 기술적 구성은 하부에 형성된 PIFA(Planer Inverted-F Antenna) 하부 방사 패치층과, 상기 하부 방사 패치층의 상부면에 적층되는 PIFA(Planer Inverted-F Antenna) 상부 방사 패치층으로 이루어지는 더블 방사 패치층; 상기 하부 방사 패치층의 타면에 형성된 접지층; 상기 하부 방사 패치층과 동일한 면에 평행하도록 형성시켜 RF 전력을 상기 각 방사 패치층으로 공급하는 급전부; 상기 급전부의 일측에 구비되는 태그칩; 상기 각 방사 패치층의 일측 및 상기 급전부의 일측을 접지면과 단락시키는 단락부; 를 포함하여 이루어지는 것을 특징으로 한다. Double-PIFA, RFID, 태그 안테나, 패치, 급접 결합 급전 구조
Abstract:
A wide band RFID tag antenna is provided to adjust input resistance characteristics by adjusting a distance between a feed part and a radiation patch. A wide band RFID tag antenna(1) includes a radiation patch(10), a short circuit pin(11), a ground layer(20), a feed part(30), and a dielectric body(50). The feed part includes short circuit pins(31,33), a tag chip(35), and a pad(39). The radiation patch has a certain thickness of a rectangular shape and a planar inverted-F antenna. The radiation patch uses the planar inverted-F antenna resonated at 1/4 wavelength to reduce the size of a microstrip patch. The radiation patch includes a plurality of short circuit pins arranged in a width direction thereof.