equals to six, the SHG induced by the periodic structure is observed, obviously. It means that to observe the SHG, the D-E curve needs to be noncentrosymmetric, and the periodic structure of ferroelectric crystal can enhance SHG for the quasi centrosymmetric of hysteresis loop model.
CONCLUSIONIn this study, we proposed a novel FETD scheme for solving nonlinear Maxwell's equations. By combining finite element discretization and the parametric quadratic programming method, the proposed method is believed to have more flexibility in geometric modeling than the conventional nonlinear FDTD method, and better time stepping efficient than the conventional FETD method. Several relatively simple cases are shown here to validate the proposed method. Applying this method to more nonlinear problems to show its further advantageous would be our future study. REFERENCES 1. R.M. Joseph and A. Taflove, FDTD Maxwell's equations models for nonlinear electrodynamics and optics, IEEE Trans Antennas Propag 45 (1997), 364-376. 2. R. Ziolkowski, Full-wave vector Maxwell equation modeling of the self-focusing of ultrashort optical pulses in a nonlinear kerr medium exhibiting a finite response time, J Opt Soc Am B 10 (1993), 186-198. 3. M. Wong, O. Picon, and V. Fouad Hanna, A finite element method based on Whitney forms to solve Maxwell equations in the time domain, IEEE Trans Magn 31 (1995), 1618-1621. 4. J. Chen, and Q.H. Liu, A non-spurious vector spectral element method for Maxwell's equations, Prog Electromagn Res 96 (2009), 205-215. 5. A. Fisher, D. White, and G. Rodrigue, An efficient vector finite element method for nonlinear electromagnetic modeling, J Comput ABSTRACT: This article elaborates the theoretical and measurement technique to evaluate precise and accurate electric (E)-field strength for frequency range 0.8-2.4 GHz (2G and 3G communication spectrum). The E-field using a probe is precisely measured inside an indigenously designed transverse electromagnetic (TEM) cell as per IEEE Std. 1309-2013.Key parameters for precise E-field measurement are explicated with their measurement results such as probe linearity, field distortion, and mismatch losses. E-field strength of probe has been reported 9.91 V/m with an expanded uncertainty (k $ 2) of 60.58 V/m for 118 dBm fed power at 915 MHz frequency.
