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Proceedings Paper

Modeling of rf MEMS switches
Author(s): Barbara Robertson; Fat Duen Ho; Tracy Dean Hudson
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Paper Abstract

The microelectromechanical system (MEMS) switch offers many benefits in radio frequency (RF) applications. These benefits include low insertion loss, high quality factor (Q), low power, RF isolation, and low cost. The ability to manufacture mechanical switches on a chip with electronics can lead to higher functionality, such as single-chip arrays, and smart switches. The MEMS switch is also used as a building block in devices such as phase shifters, filters, and switchable antenna elements. The MEMS designer needs models of these basic elements in order to incorporate them into their applications. The objective of this effort is to develop lumped element models for MEMS RF switches, which are incorporated into a CAD software. Tanner Research Inc.'s Electronic Design Automation (EDA) software is being used to develop a suite of mixed-signal RF switch models. The suite will include switches made from cantilever beams and fixed-fixed beams. The switches may be actuated by electrostatic, piezoelectric or electromagnetic forces. The effort presented in this paper concentrates on switches actuated by electrostatic forces. The lumped element models use a current-force electrical-mechanical analogy. Finite element modeling and device testing will be used to verify the Tanner models. The effects of materials, geometries, temperature, fringing fields, and mounting geometries are considered.

Paper Details

Date Published: 1 October 2001
PDF: 8 pages
Proc. SPIE 4559, MEMS Components and Applications for Industry, Automobiles, Aerospace, and Communication, (1 October 2001); doi: 10.1117/12.443025
Show Author Affiliations
Barbara Robertson, U.S. Army Aviation and Missile Command (United States)
Fat Duen Ho, Univ. of Alabama in Huntsville (United States)
Tracy Dean Hudson, U.S. Army Aviation and Missile Command (United States)


Published in SPIE Proceedings Vol. 4559:
MEMS Components and Applications for Industry, Automobiles, Aerospace, and Communication
Henry Helvajian; Siegfried W. Janson; Franz Laermer, Editor(s)

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