Material Selection of Rf-Mems Switch Used for Reconfigurable Antenna Using Ashby's Methodology

Abstract

Abstract-This paper reports material selection methodology for radio frequency -micro electro mechanical systems (RF-MEMS) switches used for reconfigurable antennas. As there are variety of materials available to design engineer, a proper technique to select the best possible material is needed. Three primary performance indices, pull-in voltage, RF-loss, and thermal residual stress, are used to obtain the desired performance. The selection chart shows that aluminum is the most suitable material for being used as bridge material in RF-MEMS switches to provide the best performance in reconfigurable antenna.

Corrosion in biomass combustion: A materials selection analysis and its interaction with corrosion mechanisms and mitigation strategies

“…An excellent introduction to such methods can be found in [197]. Although the Ashby approach has limitations at dealing with situations involving multiple objectives [197], it successfully applies to a variety of components [198][199][200]. This methodology is developed in the present section to screen and rank candidates for superheater materials for biomass combustion plants.…”

Performance analysis of RF MEMS capacitive switch with non uniform meandering technique

“…In the actuated state (switch ON), the electrostatic force pulls the membrane down, resulting in capacitive loading of the CPW transmission line. The Off state (TX line OFF) capacitance is given by (Sharma and Gupta 2012).…”

Switching time analysis for non-uniform serpentine flexure based RF-MEMS switches

“…... (8) The z direction spring constant for one meander based non uniform spring can be given as: (9) shows the spring constant for single meander based serpentine spring. This analytical method for spring constant calculation can be used for 2 meander based non uniform serpentine springs.…”

“…1. This switch beam is suspended at a height of go above the dielectric layer on the transmission line [8]. A suspended micro machined bridge structure is constructed with a length L, width wand thickness t. The switch beam is suspended with serpentine flexure over the actuation electrode.…”