In this letter, asymmetrical coupled microstrip lines with finite metalliza
tion thickness are proposed and investigated by the mode-matching method. T
he numerical results show that the metallization thickness affects thr prop
agation characteristics, and can be a new parameter in the asymmetrical cou
pled microstrip, lines, which enables us to design more accurate properties
of monolithic microwave integrated circuits (MMICs). (C) 2001 John Wiley &
Sons, Inc.