A global finite-element time-domain analysis of active nonlinear microwave circuits

An extension of the finite-element time-domain (FETD) method for mixed electromagnetic and circuit simulation of complex active microwave circuits is proposed in this paper. The passive distributed part of the circuit is analyzed using FETD and its interaction with lumped passive/active linear/nonlinear components is modeled via an equivalent-current generator whose value and internal capacitive admittance are computed at each time step by the FETD solver. Benchmark tests on a microwave amplifier and a injection-locked oscillator indicate that this extended FETD is not only superior in mesh flexibility, but also gives more accurate results than the similar FDTD-based algorithm.

[1]  J.-F. Lee,et al.  Application of the AWE method with the 3-D TVFEM to model spectral responses of passive microwave components , 1998 .

[2]  Z. Cendes,et al.  S-domain methods for simultaneous time and frequency characterization of electromagnetic devices , 1998 .

[3]  Ingo Wolff,et al.  Steady‐state analysis of nonlinear forced and autonomous microwave circuits using the compression approach , 1995 .

[4]  Jianming Jin,et al.  Efficient time-domain and frequency-domain finite-element solution of Maxwell's equations using spectral Lanczos decomposition method , 1998 .

[5]  Allen Taflove,et al.  FD-TD modeling of digital signal propagation in 3-D circuits with passive and active loads , 1994 .

[6]  P. Ciampolini,et al.  Accurate and efficient circuit simulation with lumped-element FDTD technique , 1996 .

[7]  J.W. Bandler,et al.  Space mapping optimization of waveguide filters using finite element and mode-matching electromagnetic simulators , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[8]  Raj Mittra,et al.  Radar cross section computation of inhomogeneous scatterers using edge‐based finite element methods in frequency and time domains , 1993 .

[9]  A. Bossavit.  Whitney forms: a class of finite elements for three-dimensional computations in electromagnetism , 1988 .

[10]  T. Itoh,et al.  Global time-domain full-wave analysis of microwave FET oscillators and self-oscillating mixers , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[11]  M.F. Wong,et al.  A new global time domain electromagnetic simulator of microwave circuits including lumped elements based on finite element method , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[12]  Jacques Citerne,et al.  A new global finite element analysis of microwave circuits including lumped elements , 1996, IMS 1996.

[13]  A. Taflove,et al.  The use of SPICE lumped circuits as sub-grid models for FDTD analysis , 1994, IEEE Microwave and Guided Wave Letters.

[14]  Ruey-Beei Wu,et al.  Modeling of microwave active devices using the FDTD analysis based on the voltage-source approach , 1996 .

[15]  Tatsuo Itoh,et al.  Full-wave analysis of packaged microwave circuits with active and nonlinear devices: an FDTD approach , 1997 .

[16]  John W. Bandler,et al.  Electromagnetic optimization of 3-D structures , 1997 .

[17]  O. Picon,et al.  A finite element method based on Whitney forms to solve Maxwell equations in the time domain , 1995 .

[18]  Tatsuo Itoh,et al.  Electromagnetic simulation of mode control of a two element active antenna , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[19]  C. Durney,et al.  Extending the two-dimensional FDTD method to hybrid electromagnetic systems with active and passive lumped elements , 1992 .