ETRI Journal
- Volume 29 Issue 5
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- Pages.673-675
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- 2007
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
A 60 GHz Medium Power Amplifier for Radio-over-Fiber System
- Chang, Woo-Jin (Department of Electronics Engineering, Chungnam National University) ;
- Oh, Seung-Hyeub (Department of Electronics Engineering, Chungnam National University) ;
- Kim, Hae-Choen (IT Components & Material Research Center, ETRI)
- Received : 2007.04.11
- Published : 2007.10.31
Abstract
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.