Even-odd-mode analysis and experimental studies on tap-offs for CATV networks

Author

Kim, Dong II ; Hwang, Jae Hyun ; Cho, Hyung Rae

Author_Institution

Dept. of Radio Sci. & Eng., Korea Maritime Univ., South Korea

Volume

48

Issue

4

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

1033

Lastpage

1037

Abstract

A new application method was proposed, where the even-odd-mode theory for a symmetrical coupled-line directional coupler was applied to a transformer-type directional coupler. In addition, the tap-offs were analyzed by the proposed theory, which are widely used in CATV (cable television), DBS (direct broadcasting satellite), CS (communication satellite) systems. By comparing the calculation results to the measured ones using the even-odd-mode reflection coefficients only, the validity of the proposed analysis method was confirmed. Then, the tap-off has been broadened from 5 MHz over 4,000 MHz by adopting the proposed theory.

Keywords

cable television; coupled transmission lines; direct broadcasting by satellite; directional couplers; electromagnetic wave reflection; modal analysis; transformers; CATV networks; DBS; cable television; communication satellite systems; direct broadcasting satellite; even-odd-mode analysis; even-odd-mode reflection coefficients; even-odd-mode theory; symmetrical coupled-line directional coupler; tap-off circuit; transformer-type directional coupler; Coils; Design methodology; Directional couplers; Equivalent circuits; Frequency; Impedance; Insertion loss; Permeability; Satellite broadcasting; Scattering parameters;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2003.1196435

Filename

1196435