Title :
MEMS-Based Reconfigurable RF Circuits for Future Mobile Terminals
Author :
Okazaki, Hiroshi ; Fukuda, Atsushi ; Kawai, Kunihiro ; Furuta, Takayuki ; Narahashi, Shoichi
Author_Institution :
Res. Labs., NTT DoCoMo, Inc., Yokosuka
Abstract :
Reconfigurable radio frequency (RF) circuits will be the predominant solution for future mobile terminals. Recent progress in RF-microelectromechanical systems (MEMS) devices has bolstered the hope for the implementation of high-performance reconfigurable RF circuits. This paper presents configurations for a novel band-reconfigurable power amplifier, a reconfigurable isolator, and a resonator for a center frequency and bandwidth tunable filter. These RF circuits were prototyped. The reconfigurable power amplifier using MEMS switches achieves comparable performance to that of a single-band power amplifier in four different frequency bands. The isolator and the resonator prototypes confirm the feasibility of the proposed configuration. These reconfigurable RF circuits will contribute to band-free operation in future mobile terminals.
Keywords :
microswitches; mobile radio; power amplifiers; radiofrequency amplifiers; radiofrequency filters; resonator filters; MEMS switches; RF-microelectromechanical systems; band-reconfigurable power amplifier; bandwidth tunable filter; mobile terminals; reconfigurable RF circuits; reconfigurable isolator; reconfigurable radio frequency circuits; resonator; single-band power amplifier; Bandwidth; Isolators; Micromechanical devices; Power amplifiers; Prototypes; Radio frequency; Radiofrequency amplifiers; Radiofrequency integrated circuits; Software radio; Tunable circuits and devices; Microelectromechanical devices; Microwave filters; Microwave isolators; Microwave power amplifiers;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554563