Title :
A new analysis method and broad-band design of tap-offs for CATV/DBS systems
Author :
Kim, Dong, II ; Hwang, Jae Hyun ; Takahashi, Michiharu
Author_Institution :
Dept. of Radio Sci. & Eng., Korea Maritime Univ., South Korea
fDate :
2/1/2000 12:00:00 AM
Abstract :
A new analysis method of tap-off for CATV (cable television) and DBS (direct broadcasting satellite) system was proposed and investigated by using 4-port and 3-port equivalent circuits. As a new analysis method the even-odd-mode theory of a symmetrical coupled-line directional coupler was introduced, and then it was applied to transformer type directional coupler and analyzed. By comparing the results of simulation and measurement the validity of proposed analysis method was confirmed. Furthermore, the tap-off has been broadened from 5 MHz to 2450 MHz by adopting the proposed theory
Keywords :
cable television; direct broadcasting by satellite; directional couplers; equivalent circuits; microstrip directional couplers; multiport networks; telecommunication transmission lines; 3-port equivalent circuits; 4-port equivalent circuits; CATV; DBS; broad-band design; cable television; direct broadcasting satellite; even-odd-mode theory; symmetrical coupled-line directional coupler; tap-offs; transformer type directional coupler; Circuits; Design methodology; Electronics industry; Satellite broadcasting;
Journal_Title :
Consumer Electronics, IEEE Transactions on
