A precise nonlinear simulation for SAW duplexers considering nonlinear elasticity

This paper proposes a precise nonlinear simulation technique for surface acoustic wave (SAW) duplexers, especially for the in-band 3rd order nonlinear distortion, the so-called ‘triple beat’. The model is based on the nonlinearity of SAW stress vs. strain (nonlinear elasticity), and needs just one nonlinear parameter, which represents the 3rd order nonlinear coefficient for the elastic constant. The simulation results for 1.9 GHz Personal Communications Service (PCS) SAW duplexers demonstrate fairly good agreement with the measurements with a discrepancy of only 1 dB.

[1]  Tokihiro Nishihara,et al.  A circuit model for nonlinear simulation of radio-frequency filters employing bulk acoustic wave resonators , 2008, 2008 IEEE MTT-S International Microwave Symposium Digest.

[2]  Y. Ebata,et al.  A numerical method for stress analysis in a SAW resonator , 1998, 1998 IEEE Ultrasonics Symposium. Proceedings (Cat. No. 98CH36102).

[3]  David A. Feld.  One-parameter nonlinear mason model for predicting 2nd & 3rd order nonlinearities in BAW devices , 2009, 2009 IEEE International Ultrasonics Symposium.

[4]  C. Collado,et al.  Nonlinear distributed model for IMD prediction in BAW resonators , 2008, 2008 IEEE Ultrasonics Symposium.

[5]  Dong S. Shim,et al.  A general nonlinear Mason model of arbitrary nonlinearities in a piezoelectric film , 2010, 2010 IEEE International Ultrasonics Symposium.

[6]  K. Hashimoto.  Surface Acoustic Wave Devices in Telecommunications , 2000 .

[7]  Parveen Wahid,et al.  Third order nonlinear distortion of SAW duplexers in UMTS system , 2010, 2010 IEEE International Ultrasonics Symposium.