A Novel Method for Analyzing & Predicting of Group Delay Variations in Wideband Transmission Lines

Author

Eskandari, A.R. ; Mohammady, L. ; Eliasi, B.

Author_Institution

Iran Telecommun. Res. Center, Tehran

fYear

2007

fDate

9-11 Dec. 2007

Firstpage

298

Lastpage

301

Abstract

Group delay variations (GDV) versus frequency is an essential factor which causes distortion and degradation in wideband satellite signals specially when using phase modulation and high data rates. In this paper, the effect of reflections from discontinuities and impedance mismatches at transmission lines, on GDV quantity, is investigated by suggesting a novel network model of transmission line with discontinuity or impedance mismatch, and extracting a new formula for GDV. Graphical data are presented based upon the formula developed, and the simulation results are also given by AWR software which confirms the theory and formula. At last, based on the developed formula, some calculations will be carried out to predict the values of GDV parameter.

Keywords

broadband networks; coaxial cables; delays; phase modulation; satellite communication; transmission lines; AWR software; group delay variations; impedance mismatch; network model; phase modulation; wideband satellite signals; wideband transmission lines; Degradation; Delay lines; Frequency; Impedance; Phase distortion; Satellites; Transmission line discontinuities; Transmission line theory; Transmission lines; Wideband; Group delay; coaxial cables; discontinuity; dispersion; group delay variations; mismatch; transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio-Frequency Integration Technology, 2007. RFIT 007. IEEE International Workshop on

Conference_Location

Rasa Sentosa Resort

Print_ISBN

978-1-4244-1307-2

Electronic_ISBN

978-1-4244-1308-9

Type

conf

DOI

10.1109/RFIT.2007.4443975

Filename

4443975