The MIIS Eprints Archive

Some studies on the deformation of the membrane in an RF MEMS switch

Ambati, Vijaya Raghav and Asheim, Andreas and van den Berg, Jan Bouwe and van Gennip, Yves and Gerasimov, Tymofiy and Hlod, Andriy and Planque, Bob and van der Schans, Martin and van der Stelt, Sjors and Rivera, Michelangelo Vargas (2008) Some studies on the deformation of the membrane in an RF MEMS switch. [Study Group Report]



Radio Frequency (RF) switches of Micro Electro Mechanical Systems (MEMS) are appealing to the mobile industry because of their energy efficiency and ability to accommodate more frequency bands. However, the electromechanical coupling of the electrical circuit to the mechanical components in RF MEMS switches is not fully understood.

In this paper, we consider the problem of mechanical deformation of electrodes in RF MEMS switch due to the electrostatic forces caused by the difference in voltage between the electrodes. It is known from previous studies of this problem, that the solution exhibits multiple deformation states for a given electrostatic force. Subsequently, the capacity of the switch that depends on the deformation of electrodes displays a hysteresis behaviour against the voltage in the switch.

We investigate the present problem along two lines of attack.
First, we solve for the deformation states of electrodes using numerical methods such as finite difference and shooting methods. Subsequently, a relationship between capacity and voltage of the RF MEMS switch is constructed. The solutions obtained are exemplified using the continuation and bifurcation package AUTO.
Second, we focus on the analytical methods for a simplified version of the problem and on the stability analysis for the solutions of deformation states. The stability analysis shows that there exists a continuous path of equilibrium deformation states between the open and closed state.

Item Type:Study Group Report
Problem Sectors:Materials
Study Groups:European Study Group with Industry > ESGI 63 (Twente, Netherlands, Jan 28-Feb 1, 2008) (SWI 2008)
Company Name:NXP
ID Code:265
Deposited By: Dr Kamel Bentahar
Deposited On:09 Nov 2009 19:12
Last Modified:29 May 2015 19:52

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