Design and Analysis of Serpentine Flexure Based RF MEMS Switch for High Isolation with Low Pull-in voltage

  • K. Girija Sravani
  • Koushik Guha
  • K. Srinivasa RaoEmail author
Regular Paper


This paper presents the design and performance analysis of radio frequency micro electro mechanical system switches having serpentine flexure designs. In this paper, we have done, behavioral analysis by changing material, gap and thickness, increase in the actuation area using menders, impact of holes on effective working of the switch, stress analysis for low spring constant, electromechanical analysis for low pull-in voltage and high capacitance ratio, time dependent analysis for faster switching time, scattering parameter analysis for reducing RF losses are simulated and compared with the theoretical analysis. The significant improvements in this work are lesser air gap and beam thickness reduced the pull-in voltage to 2.75 V for 1.66 µm displacement, a rapid switching time of 0.9 µs obtained through simulation, an improved capacitance ratio of 157.25, isolation is 49.59 dB, insertion loss is 0.005 dB. Actuation area is increased, and switch area is reduced to achieve the optimum performance of the switch.


RF MEMS switch Serpentine flexure design Pull-in voltage Switching time Insertion loss Isolation Capacitance ratio Electrostatics RF performance 



The Authors would like to thank to NMDC supported by NPMASS, for providing the necessary computational tools.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no competing interests.


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Copyright information

© The Korean Institute of Electrical and Electronic Material Engineers 2018

Authors and Affiliations

  • K. Girija Sravani
    • 1
    • 2
  • Koushik Guha
    • 2
  • K. Srinivasa Rao
    • 1
    Email author
  1. 1.MEMS Research Center, Department of ECEKoneru Lakshmaiah Education Foundation (Deemed to be University)GunturIndia
  2. 2.National MEMS Design Center, Department of ECENational Institute of Technology SilcharAssamIndia

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