Improve the Performance of a Novel Capacitive Shunt RF MEMS Switch by Beam and Dielectric Materials

  • S. Girish Gandhi
  • I. GovardhaniEmail author
  • Sarat Kumar Kotamraju
  • K Ch Sri Kavya
  • D. Prathyusha
  • K. Srinivasa Rao
  • K. Girija Sravani
Regular Paper


This paper deals with design and simulation of RF MEMS Shunt type switch having non-uniform meanders. The device is optimized and done various electromechanical and RF performance analysis in the COMSOL multiphysics and HFSS tools. By varying the thickness of beam, gap and changing the beam materials such as Gold, Copper, Nickel, we done simulation and calculation of spring constant, pull-in voltage, capacitance analysis of the proposed switch. Out of all these different materials, Gold is best by its material properties. The pull-in voltage of proposed switch is 16.9 V, the switch have fast switching time i.e. 1.2 µs. The capacitance analysis like Up state and down state capacitance of the proposed switch is 7.46 fF and 1.25 pF. The RF-Performance of the proposed switch exhibits at low frequencies (2–12 GHz). The return and insertion loss are carried out by proposed switch is − 41.55 dB, − 0.0865 dB respectively. The switch having good isolation is − 47.70 dB at 5 GHz. The proposed shunt type switch is used for low frequencies such as microphones, radar and satellite applications.


Pull-in-voltage RF shunt switch Capacitance analysis Beam materials 



The authors would like to thank NMDC, supported by Govt. of India, for providing necessary design facilities through NPMASS.


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Copyright information

© The Korean Institute of Electrical and Electronic Material Engineers 2019

Authors and Affiliations

  • S. Girish Gandhi
    • 1
  • I. Govardhani
    • 1
    Email author
  • Sarat Kumar Kotamraju
    • 1
    • 2
  • K Ch Sri Kavya
    • 1
  • D. Prathyusha
    • 1
  • K. Srinivasa Rao
    • 1
  • K. Girija Sravani
    • 1
  1. 1.Department of ECEKoneru Lakshmaiah Education Foundation (Deemed to be University)GunturIndia
  2. 2.Visiting Professor, Telecommnications-ICTAsian Institute of TechnologyBangkokThailand

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