ANN Model of RF MEMS Lateral SPDT Switches for Millimeter Wave Applications

S. Suganthi, K. Murugesan, S. Raghavan

Abstract


This paper presents Artificial Neural Network (ANN) implementation for the Radio Frequency (RF) and Mechanical modeling of lateral RF Micro Electro Mechanical System (MEMS) series micro machined Single pole double through (SPDT) switch. We propose an efficient approach based on ANN for analyzing the losses in ON and OFF state of lateral RF MEMS series switch by calculating the S-parameters. The double beam structure has been analyzed in terms of its return, isolation and insertion losses with the variation of its passive circuit component values. The effect of design parameters has been analyzed and the lateral switch was realized with low insertion loss, high return and isolation losses. ANN model were trained with five different training algorithms namely Levenberg-Marquart (LM), Bayesian Regularization (BR), Quasi - Newton (QN), Scaled Conjugate Gradient (SCG) and Conjugate Gradient of Fletcher - Powell (CGF) to obtain better performance and fast convergence. The results from the neural model trained by Levenberg-Marquardt back propagation algorithm are highly agreed with the theoretical results available in the literature. The neural networks shows the better results with the highest correlation coefficient which measures the strength and direction of linear relation between two variables (actual and predicted values) (0.9998) along with lowest root mean square error (MSE) of (0.0039).

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References


Muldavin J B and Rebeiz G M, "High isolation MEMS shunt switches part 1: Modeling`` IEEE Trans Microwave Theory Tech., 48, pp.1045-1052.

K.E.Peterson, "Micromechanical membrane switches on silicon, "IBM J.Res.Develop.,Vol.23,no.4,pp.376-385,July 1979.

M. Tang, A.Q. Liu, A. Agarwal, Z.-S. Liu, C. Lu, "A single-pole double-throw (SPDT) circuit using lateral metalcontact micro machined switches``, IEEE Trans Sensors and Actuators 121, pp.187–196, 2005.

Mohammad N. Mollah and Nema1 C. Karmakar, "RF- MEMS Switches: Paradigms of Microwave Switching``, Proceedings of APMC200 1, Taipei, Taiwan, R.O.C.pp.1024-1027, 2001.

Gabriel M. Rebeiz,"RF MEMS Switches: Status of the Technology``, Proceedings of the 12th International Conference on Solid State Sensors, Actuators and Microsystems, Boston, June 8-12, pp.1726-1729, 2003.

A Q Liu1, M Tang, A Agarwal and A Alphones, "Low-loss lateral micro machined switches for high frequency applications``, J. Micromech. Microeng. 15, pp.157–167, 2005.

Hah D, Yoon E and Hong S, "A low-voltage actuated micro machined microwave switch using torsion springs and leverage``,IEEE Trans. Microw. Theory Tech. 48 2540–6, 2000.

G. M. Rebeiz, "RF MEMS, Theory, Design and Technology``, John Wiley and Sons, Hoboken, 2003.

Elliot R. Brown, "RF-MEMS switches for reconfigurable integrated circuits``, IEEE Trans. Microwave Theory Tech., pp.1868-1880, Nov. 1998.

B.Lakshanarayana, T.Weller, "Distributed MEMS phase shifters on silicon using Tapered Impedance unit cells``, in IEEE MTT-S Digest pp.1237-1240, 2002.

T.Shigemastsu,N.Suematsu,N.takeuchi,Y.Iyama,A.Mizobuch, "A 6-18GHz 20W SPDT switch using shunt discrete Pin diodes``, Proceedings of the IEEE MTT-S Dig, pp. 527-530, 1997.

Winchester, K.J.Dell, J.M, "Finite element analysis of tunable fabry perot MEMS structures``,Proc. of Optoelectronics and micro electronics materials and devices, pp:324-327,2000.

S.Suganthi, K.Murugesan and S.Raghavan, "Neural Network based Realization and Circuit Analysis of Lateral RF MEMS Series Switch,`` Proceedings of the IEEE International Conference on Computer,Communication and Electrical Technology, March 18-19, pp.260-265, 2011.

Ai Qun Liu, Aibin YuMing Tang, Muhammad Faeyz Karim and Selin Teo Hwee Gee, "RF MEMS Switches and Integrated Switching Circuits-Design, Fabrication, and Test``, Springer MEMS Reference Shelf, 2010.

Gere J M and Timoshenko S P, "Mechanics of Materia``,l 4th edn (Boston, MA: PWS), 1997.

Gregory L. Creech, Bradley J. Paul, Christopher D. Lesniak, Thomas J. Jenkins, Mark C. Calcatera, "Artificial Neural Networks for Fast and Accurate EM-CAD of Microwave Circuits``, IEEE Trans. Microwave theory Tech., vol. 45 no.5, pp. 1794 -802, 1997.

Younjae Lee and dejan S Filipovic, "ANN based electromagnetic models for the design of RF MEMS switches``, IEEE Microwave and Wireless components Letters, Vol.15, No.11, pp.823-825, 2005 Zaabab, Q. Zhang, and M. Nakhla, "Analysis and optimizations of microwave circuits and devices using neural networks models``, IEEE MTT-S Dig., San Diego., CA, pp. 393 -396, 1994.

S. Haykin 1994, "Neural Networks: A Comprehensive Foundation``, Macmillan College Publishing Comp.

K. Levenberg,"A Method for the solution of Certain Nonlinear Problems in Least Squares``, Quart. Appl.Math.Vol. 2, pp.164-168, 1944.

D.J.C. MacKay, 1992, "Bayesian interpolation``, Neural Computation, Vol. 4, pp. 415-447.

C. Yildiz and M. Turkmen, "A CAD Approach Based on Artificial Neural Networks for Shielded Multilayered Coplanar Waveguides``, AEU International Journal of Elect. And Com. Vol. 58, pp.284-292, 2004.




DOI: http://dx.doi.org/10.1590/S2179-10742012000100011

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