Modeling and fabrication of an RF MEMS variable capacitor with a fractal geometry
KAUST DepartmentCompetitive Research Funds
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
OCRF- Special Academic Partnership
Office of the VP
Physical Science and Engineering (PSE) Division
Online Publication Date2013-08-14
Print Publication Date2013-05
Permanent link to this recordhttp://hdl.handle.net/10754/298986
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AbstractIn this paper, we model, fabricate, and measure an electrostatically actuated MEMS variable capacitor that utilizes a fractal geometry and serpentine-like suspension arms. Explicitly, a variable capacitor that possesses a top suspended plate with a specific fractal geometry and also possesses a bottom fixed plate complementary in shape to the top plate has been fabricated in the PolyMUMPS process. An important benefit that was achieved from using the fractal geometry in designing the MEMS variable capacitor is increasing the tuning range of the variable capacitor beyond the typical ratio of 1.5. The modeling was carried out using the commercially available finite element software COMSOL to predict both the tuning range and pull-in voltage. Measurement results show that the tuning range is 2.5 at a maximum actuation voltage of 10V.
CitationElshurafa AM, Salama KN, Ho PH (2013) Modeling and fabrication of an RF MEMS variable capacitor with a fractal geometry. 2013 IEEE International Symposium on Circuits and Systems (ISCAS2013). doi:10.1109/ISCAS.2013.6572438.
Conference/Event name2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013