Abstract:
A contiguous multi channel multiplexer is provided to facilitate a production of a product having the same property by minimizing a tuning screw process or a tuning pattern process. A contiguous multi channel multiplexer includes a first to a third diplexer(220~240), a broadband low pass filter(210), and a broadband high pass filter(250). The broadband low pass filter is serially connected to an input terminal of the first diplexer. The broadband high pass filter is serially connected to an output terminal of the third diplexer. A pattern of an input terminal feed line and a pattern of an output terminal feed line of an SSS(Suspended Substrate Stripline) substrate are connected through a via hole(250v).
Abstract:
본 발명은 초고주파 렌즈가 광대역 및 광각 빔조향 범위에 대하여 균일 진폭 및 위상 전달 특성을 갖고, 별도의 점검 소자를 장착할 필요가 없는 자기 점검 기능을 가진 소형의 초고주파 렌즈를 구현함으로써 소형의 능동위상배열 송수신 장치를 제공하기 위한 것으로, 본 발명에 의한 초고주파렌즈는 다수(多數)의 빔포트와, 다수의 배열포트와, 그리고 상기 다수의 빔포트 또는 배열포트 각각의 사이에 형성된 하나 이상의 더미포트를 포함하여 이루어진 초고주파 렌즈에 있어서, 최외곽 빔포트 및 배열포트의 테이퍼 지향각이 평행판 경계면의 곡률과 예각을 이루도록 적절히 조정되고, 또한 상기 하나 이상의 더미포트 중 한개의 더미포트의 위치에 점검포트가 구성되며, 상기 점검포트에 인접한 배열포트 또는 빔포트의 전송선로부의 지향각이 적절히 조정되어 구성된다. 이러한 구성에 의하여, 렌즈의 크기를 증대시키지 않고도 광대역 광각 빔조향 특성을 갖는 자기 점검 기능을 구비한 초고주파 렌즈의 구현이 가능하다. 초고주파렌즈, 마이크로스트립, 능동위상배열 송수신 장치, 점검포트
Abstract:
본 발명에 의한 혼 안테나는 크게 도파관부, 급전부 및 안테나부로 이루어지고, 3:1의 동작주파수 대역을 가지는 것으로서, 안테나부는 전계(E) 및 자계(H) 양방향으로 확장된 형상을 가짐으로써 안테나 개구면에 분포되는 등가전류원의 위상 분포가 2차 위상차 또는 정현파 (sinusoidal) 함수를 가지고, 동작주파수 대역의 위상정수 k와 혼 길이 ρ H 또는 ρ E 의 곱이 5.6π 내지 17π 범위에 있도록 혼 길이가 결정되며, 주자계면 방향의 확장각 θ H 이 50° 내지 250°이고, 주전계면 방향의 확장각 Φ E 이 50° 내지 250°가 되도록 설계된다. 또한, 주자계면에서의 반전력 빔폭의 평균값이 자계 방향 확장각 θ H 의 1/2이 되고, 반전력 빔 폭의 표준편차가 1°이하가 되도록 자계 방향 확장각 θ H 이 100°내지 180°범위에서 결정되고, 주전계면에서의 반전력 빔 폭의 평균값이 전계 방향 확장각 Φ E 보다 약 20°가 작은 값을 가지며, 주파수 변화에 따른 반전력 빔 폭의 표준편자가 4°이하가 되도록 전계 방향 확장각 Φ E 이 100 내지 250°범위에서 결정되는 것을 특징으로 한다.
Abstract:
PURPOSE: An inrush current control circuit and a power supplier using the inrush current control circuit are provided to prevent the damage of an electronic equipment by efficiently controlling an inrush current generated when applying power. CONSTITUTION: A rectifying unit(310) receives an alternating current power(300) to convert it into a direct current power. A smoothing unit(330) stabilizes the direct current power and outputs it. An inrush current control circuit(320) is comprised of the first capacitor(421), a power MOSFET(Metal-Oxide Semiconductor Field Effect Transistor), and a charging time constant control unit. The first capacitor(421) smoothes the direct current power inputted from the rectifying unit(310) and outputs it. The power MOSFET(422) is operated by the direct current power outputted from the first capacitor(421) and slowly changes resist value between a source and a drain so that an inrush current flows in slowly. A power supplying unit(340) supplies the direct current power outputted from the smoothing unit(330) to all sorts of power equipment.
Abstract:
PURPOSE: A broad band frequency horn antenna is provided to achieve a uniform beam width and gain in a broad band frequency by suitably selecting extension angle and horn length in both directions of electric and magnetic fields. CONSTITUTION: A horn antenna comprises an antenna section(11), a feeder section(12) and a wave guide adaptor(13), and has an operation frequency band of 3:1. The antenna section is extended in both directions of electric field(E) and magnetic field(H), in such a manner that the phase distribution of the equivalent current source distributed over the antenna aperture has a quadratic function, or cosine or sine function. The horn length is determined, such that the value obtained by multiplying the phase integer of the operation frequency band and the horn length ranges 5.6π to 17π. The extension angle in the magnetic field direction and the extension angle in the electric field direction fall within the range of 50° to 250°, respectively.
Abstract:
The present invention relates to an airplane mounting device for evaluating the electromagnetic environmental effects of an airplane having an electromagnetic wave transceiving device and, more specifically, to an airplane mounting device for evaluating the electromagnetic environmental effects of an airplane having an electromagnetic wave transceiving device capable of accurately checking the electromagnetism compatibility of the airplane and the electromagnetic wave transceiving device to obtain reliability and conveniently evaluating the electromagnetic environmental effects by stably supporting the airplane having the electromagnetic transceiving device while being separated from the bottom surface. The airplane mounting device for evaluating the electromagnetic environmental effects of an airplane having an electromagnetic wave transceiving device according to the present invention comprises multiple mounting units installed in the floor corresponding to the wheel positions of the airplane; multiple electromagnetic wave absorbers attached to the mounting units; and a wheel fixing unit mounted on the top surface of the mounting units to fix the wheels of the airplane. The present invention can minimize the effects of reflective waves by arranging the electromagnetic wave absorbers while the airplane having the electromagnetic wave transceiving device is separated from the floor. Accordingly, the present invention can accurately check the electromagnetism compatibility of the airplane and the electromagnetic wave transceiving device and can obtain the reliability to verify the flight stability of the airplane and the performance of the electromagnetic wave transceiving device. Also, the present invention can conveniently and safely verify the electromagnetic environmental effects by stably mounting and fixing the wheels of the airplane with the wheel fixing unit arranged to enable forward and backward movement.