Abstract:
A method for equalizing the intensity of a line beam comprises a step of installing a first reflector at the left and a second reflector at the right based on the center of a wave front of an incident line beam as a boundary; a step of dividing the reflected wave front of the incident line beam into a first wave front and a second wave front by using the first reflector and the second reflector; a step of generating a reflection line beam by overlapping the first wave front and the second wave front by using the first reflector and the second reflector; and a step of controlling the angle of at least one among the first reflector and the second reflector to equalize the intensity of the reflection line beam.
Abstract:
전자기파의 전송을 위한 메타메타리얼 전송선에 관한 것으로, 하단에 접지면이 형성된 기판, 기판 위에 형성된 신호선 및 접지면의 일부 영역이 식각되어 형성된 식각 영역과, 식각 영역 일부에 형성되며, 신호선 일부에서 확장된 형태로 형성되는 두 개의 금속 영역을 포함하는 결함접지구조(DGS)부를 포함하는 메타메터리얼 전송선 장치에 의해 메타메터리얼 전송선의 구조를 보다 간단하게 구현할 수 있고, 높은 주파수에서의 간섭 문제에 따른 영향을 줄임으로써, 간섭 문제를 해결할 수 있다.
Abstract:
PURPOSE: A high resolution microwave lens is provided to improve loss characteristics by adding an SRR(Split Ring Resonator) structure which is one kind of a magnetic resonator, thereby obtaining an object image in which resolution is improved. CONSTITUTION: Dielectric thin films form a microwave lens by being laminated. A metal wire(330) has a fixed pattern arranged at one side of each dielectric thin film. A ring type resonator is arranged at one side of the dielectric thin film. The ring type resonator is arranged at the same side with a side of the dielectric thin film in which the metal wire is arranged. The ring type resonator is arranged in order to have radial shape symmetry.
Abstract:
PURPOSE: An apparatus and a method of implementing a transmission line a left-handed law are provided to reduce hardware complexity while being easily being implemented. CONSTITUTION: In an apparatus and a method of implementing a transmission line a left-handed law, a first etch side and a second etch side which are separated from each other by a predetermined interval while satisfying a predetermined value. A plurality of etched uneven lines to connect the first etch side to the second etch side while satisfying a predetermined capacitance between the first and second etch sides.
Abstract:
PURPOSE: A protrusion type hyper lens and a manufacturing method thereof are provided to easily manufacture a protrusion hyper lens by using a conventional concave shaped cylinder type hyper lens. CONSTITUTION: A main lens layer(10) has a concave shaped front side. A board layer(20) supports the main lens layer. The front side central part of the main lens layer is located to be more projected than the surface of the board layer. The height difference between the most projected region and the front side central part of the main lens layer is within a half wavelength. The cross section of the main lens increases from the front side to the rear side. The main lens layer is formed by alternately laminating a dielectric and a metallic foil. The dielectric and the metal have a thickness which is less than 100nm.
Abstract:
1. 청구범위에 기재된 발명이 속한 기술분야 본 발명은 광학적 제한 증폭을 이용한 초고속 광수신 장치에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은, 광학적 제한 증폭을 이용함으로써, 예를 들어 40Gb/s 이상의 초고속 광통신 시스템에서도 높은 수신감도와 넓은 광전력 수신범위를 획득할 수 있게 하는, 광학적 제한 증폭을 이용한 초고속 광수신 장치를 제공하는데 그 목적이 있음. 3. 발명의 해결방법의 요지 본 발명은, 광통신 시스템에서의 광 수신 장치에 있어서, 외부로부터 광신호를 수신하여 소정의 레벨의 광신호로 증폭하기 위한 광학적 제한 증폭 수단; 상기 광학적 제한 증폭 수단에서 출력되는 광신호를 전류신호로 변환하기 위한 광전 변환 수단; 상기 전류신호로부터, 선형적으로 증폭된 전압신호와 상기 전압신호에 대한 반전신호(반전 전압신호)를 생성하기 위한 트랜스임피던스 증폭 수단; 상기 트랜스임피던스 증폭 수단에서 출력되는 상기 전압신호와 상기 반전 전압신호 중 어느 하나를 입력받아 클럭을 추출하기 위한 클럭 추출 수단; 및 상기 클럭 추출 수단에서 추출된 클럭을 이용하여, 상기 트랜스임피던스 증폭 수단에서 출력되는 나머지 다른 신호를 입력받아 데이터신호를 복원하기 위한 데이터 판별 수단을 포함함. 4. 발명의 중요한 용도 본 발명은 광통신 시스템에서의 초고속 광 수신기 등에 이용됨. 광 수신기, 제한 증폭기, 광학적 제한 증폭기, 트랜스임피던스 증폭기, TIA
Abstract:
PURPOSE: An apparatus and method for extracting a clock of an optical signal is provided to generate a stable clock by restraining an unnecessary optical component from being extracted between desired two optical components. CONSTITUTION: An optical signal arrived at a receiving end is amplified one time in a pre-amplifier(300) and then is dividedly transmitted into a data path and a clock extraction path in a 2x2 photocoupler(310). The optical signal passing to the data path is photoelectric-converted in a photodiode(330) and then inputted to a data restoring circuit. As for the optical signal used for the clock extraction, a central wavelength and a specific side peak dropped as low as a clock frequency are simultaneously reflected in an optical filter(340) having a specific reflection spectrum, proceed back to the 2x2 photocoupler(310), are amplified in a clock amplifier(350), pass through an ASE(Amplified Spontaneous Emission) filter(360) for noise cancellation, and then are detected as a beating signal in a photodiode(370).