Title :
Novel active differential phase splitters in RFIC for wireless applications
Author :
Ma, Huainan ; Fang, Sher Jiun ; Lin, Fujiang ; Nakamura, Hiroshi
Author_Institution :
Inst. of Microelectron., Singapore Univ., Singapore
fDate :
12/1/1998 12:00:00 AM
Abstract :
Two novel active differential phase splitters have been designed and fabricated in a GaAs MESFET process. The new circuits employ a concept of feedback to adjust gain and phase unbalance separately and accurately. The active phase splitters feature simplicity, low power supply, and wide-band performance. The circuits can provide ±1 dB and 180±1° differential signals within 4 GHz bandwidth, well covering the frequency range currently used for dual-band commercial wireless communications. In narrow-band application, more accurate balanced differential signals can be achieved by external tuning
Keywords :
III-V semiconductors; MESFET integrated circuits; MMIC phase shifters; UHF integrated circuits; UHF phase shifters; baluns; circuit feedback; field effect MMIC; gallium arsenide; radio equipment; 4 GHz; GaAs; GaAs MESFET process; RFIC; active differential phase splitters; feedback; low power supply; narrow-band application; wideband performance; wireless applications; Bandwidth; Dual band; Feedback circuits; Frequency; Gallium arsenide; MESFETs; Power supplies; Radiofrequency integrated circuits; Wideband; Wireless communication;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
