Open AccessA 60 GHz Medium Power Amplifier for Radio‐over‐Fiber System
Author(s) -
Chang Woojin,
Oh SeungHyeub,
Kim Haechoen
Publication year - 2007
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.07.0207.0075
Subject(s) - amplifier , rf power amplifier , radio over fiber , electrical engineering , power (physics) , fiber , radio frequency , fiber amplifier , materials science , electronic engineering , telecommunications , computer science , engineering , optical fiber , physics , cmos , quantum mechanics , composite material
We present the design and fabrication of a 60 GHz medium power amplifier monolithic microwave integrated circuit with excellent gain‐flatness for a 60 GHz radio‐over‐fiber system. The circuit has a 4‐stage structure using microstrip coupled lines instead of metal‐insulator‐metal capacitors for unconditional stability of the amplifier and yield enhancement. The gains of each stage of the amplifier are modified to provide broadband characteristics of input/output matching for the first and fourth stages and to achieve higher gains for the second and third stages to improve the gain‐flatness of the amplifier for wideband.