CATV(Cable Television) 및 DBS(Direct Broadcasting Satellite)시스템용 신호분기기(Tap- 011)에 대한 4-Port 회로망의 해석법과 3-port회로망의 해석법을 제안하고, 이를 비교 및 검토한다. 해석법으로는 결합선로형 방향성결합기의 우·기 모오드 이론을 도입하여 변성기형 방향성결합기에 적용하였다. 제안한 해석방법의 타당성을 입증하기 위하여 등가회로를 제안하고, 분기특성을 시뮬레이션한 결과와 실험결과를 비교 검토하여 서로 잘 일치함을 보이고, 5 MHz∼2,500 MHz까지 광대역화하였다.
A new analysis method of Tap-011 for CATV and DBS systems was proposed and investigated by using 4-port and 3-port equivalent circuits. As an analysis method the even odd-mode theory for a symmetrical coupled-line directional coupler was introduced, and then it was applied to transformer type directional coupler. By comparing the results of simulation and measurement, the validity of the proposed analysis method was confirmed. Furthermore, the Tap-off has been broadened from 5 MHz to 2.500 MHz by adopting the proposed theory.
