Research Of Reconfigurable Power Amplifier Employing RF-MEMS Switches

In recent years, there has been a great deal of interest in MEMS reconfigurable circuits for applications in miniaturized multifunctional microwave systems. Multifunctional systems reconfigure a single signal path to perform multiple functions, such as communication with multiple networks with different operating frequencies and modulation schemes. RF-MEMS switches have demonstrated low loss, linear operation and low static power consumption, making them suitable components in a high-performance, reconfigurable circuit. A reconfigurable power amplifier (RPA) would be required to operate in multiple or changing operating conditions, such as diverse frequency or signal modulation schemes, and environmental conditions. RPAs could also enable a single terminal to function for both communication and radar applications, which is not feasible with conventional amplifiers since these applications have very different requirements on the amplifier.The paper based on the technology of RF-MEMS switch and reconfigurable power amplifier employing the RF-MEMS switch. About RF MEMS switches, the paper analysed and simulated MEMS capacitive shunt switches and MEMS-series switches. The microwave characteristics of RF MEMS switch have been studied with the help of HFSS software. The theory of designing microwave amplifier is discussed by designing a amplifier in ADS. This article emphasized the design process of the reconfigurable power amplifier employing RF-MEMS switch and the influence of Loss with different value on power added efficiency (PAE) is discussed. This paper presents another new types of reconfigurable networks using only one series RF MEMS switch. This technology opens up the possibility of design for other reconfigurable RF circuit by incorporating MEMS devices into the system.