Abstract:
The present invention relates to a data transceiving device communicating data between elements intra-board or inter-board in a data communication system. The data transceiving device includes a tranceiving part connected to an internal element of a board, wirelessly transmitting transmission data from the internal element to other elements out of the board or other elements in the board, and wirelessly receiving reception data from other elements. The transceiving part transceives the transmission data and the reception data through a millimeter wave band. [Reference numerals] (511) Modulator;(524) Demodulator;(540) Parallel-serial converter;(550) Serial-parallel converter
Abstract:
본 발명의 일실시예에 따른 송신기를 위한 송신 디지털 신호 처리 장치는, 초기 설정 데이터를 일정 통과 대역을 갖는 신호로 변환하기 위하여 상기 초기 설정 데이터를 쉐이핑(shaping)하는 송신 FIR 필터, 제어 신호를 생성하기 위하여 상기 변환된 초기 설정 데이터 및 상기 송신기에 대응하는 수신기로부터 피드백 된 열화 정보를 포함하는 데이터를 비교하는 비교기, 및 상기 제어 신호에 따라 보상 필터의 계수를 조절하여 대역 내 평탄도를 보상하는 대역 평탄도 보상 필터를 포함한다.
Abstract:
캐비티를 이용한 도파관 필터가 개시된다. 캐비티를 이용한 도파관 필터는 외부 신호를 입력 받는 제1 입출력부와, 제1 입출력부를 일측으로 위치시키고, 모드 결합에 의해 외부 신호를 필터링하는 캐비티(cavity)와, 캐비티의 다른 일측에서 제1 입출력부와 일직선 상이 아닌 일정 각도를 유지하며 위치하고, 필터링된 외부 신호를 출력하는 제2 입출력부를 포함한다. 캐비티, 도파관, 입출력부 위치
Abstract:
본 발명은 밀리미터파를 이용하는 송수신기를 개시한다. 본 발명은 같은 장비의 수신단의 수신신호를 바탕으로 송신신호의 출력전력을 결정함으로써 대기 중에 발생할 수 있는 손실 값을 예측하는 것이 가능하므로 전체 링크 버짓(link budget)의 성능을 향상시킬 수 있으며 출력신호의 제어를 상당히 빠르게 할 수 있다.
Abstract:
PURPOSE: A frequency correction apparatus based on a dual variable accumulation apparatus and method thereof are provided to minimize synchronization acquisition time by selecting the dual variable accumulation apparatus including separate accumulation sections. CONSTITUTION: Frequency correction units(303,304,308,309) correct the frequency by using estimated first frequency offset values. A frequency offset estimation reliability decision unit(370) stores the first frequency offset values. The frequency offset estimation determination unit controls a loop filter of the frequency correction unit and a first frequency offset estimation unit(305) according to comparison results.
Abstract:
PURPOSE: A frequency synthesizer and a method thereof are provided to improve phase noise characteristics, by using a divider, a multiplier, an IQ mixer, a switch and a fixed phase locked loop circuit. CONSTITUTION: A phase locked loop(PLL) synthesizer(310) outputs an oscillation frequency. A divider(320) divides the oscillation frequency. A phase shifter(340) shifts the phase of the divided frequency. A mixer(350) performs up-conversion of the phase-shifted frequency. A multiplier(330) multiplies the oscillation frequency. A switch(360) selects one of the multiplied frequency and the up-converted frequency.
Abstract:
PURPOSE: A multi-output oscillator and a multi-output generating method using a single oscillator for preventing interference due to image frequency are provided to output a plurality of frequencies by mixing multiplying frequency with oscillation frequency. CONSTITUTION: A first divider(24) divides a single frequency at first dividing ratio. A first mixer(25) outputs a second frequency by mixing the output of the first divider with the output of a frequency multiplier. A second divider(27) divides the single frequency at the second dividing ratio. A second mixer(28) outputs a third frequency by mixing the output of the second divider with the output of a first multiplier.
Abstract:
PURPOSE: A millimeter wave transceiver structure using a single frequency synthesizer is provided to easily implement an AGC(Automatic Gain Control) function by performing a decoding operation in a frequency which has low millimeter wave. CONSTITUTION: A transmitter generates a transmission signal from an input signal, and transmits the transmission signal to a transmission antenna(305). A receiver decodes a reception signal inputted from a reception antenna(306). A single frequency synthesizer(303) outputs a certain frequency signal, and a power distributor(304) distributes the certain frequency signal to the transmission unit and the reception unit.
Abstract:
A microwave and a millimeter-wave CMOS mixer is provided to reduce a noise generated in a broadband by low maintaining a current inputted to a switching part. A transconductor part(110) amplifies an input signal. The transconductor part obtains transconductance of two times in the same current by using two MOSs(Metal Oxide Semiconductor) of an NMOS and a PMOS at the same time. A switching part(120) outputs a downstream frequency signal by mixing a signal applied to a third node(N3) to a signal applied to a local oscillation input terminal. A capacitor(CD) separates the transconductor part from the switching part by blocking DC component applied between the transconductor part and the switching part. A current source(IB) is provided in order to reduce a noise of the switching part by low maintaining a current applied to the switching part through the third node.
Abstract:
A directional antenna and a transmitter-receiver employing the same are provided to adjust a feeder of signals in order to obtain a desired beam direction. A directional antenna comprises a feeder(32), a radiator and a via. The feeder is symmetrically arranged on a substrate(31). The radiator is arranged on the end part of the feeder. The via connects the feeder to the radiator. The bilateral symmetry degree of the feeder is adjusted in order to control the direction of beam which is radiated through the radiator. A device made of conductive materials is additionally contained in order to reduce grating lobe of the beam while surrounding the feeder, radiator and the via.