Study on Available Condition of Static Circuit Parameters Applied to Predict the Transmission Characteristics of Step Microstrip Line

The static circuit parameters extracted from the field results of non-uniform microstrip line provides an efficient way to predict dynamic effect of non-uniform structure. The predictable frequency range of the static circuit parameters on prediction of the transmission characteristics of step microstrip line is researched in this paper. The circuit parameters are extracted from the full wave results of step line, respectively, at three frequencies (9 GHz, 15 GHz and 20 GHz). On one hand, the time domain transmission characteristics of step line can be solved from the equivalent circuit constructed by these extracted circuit parameters. On the other hand, the frequency domain S -parameter can be derived by the static distributed characteristic impedance. By comparing these time and frequency domain results obtained from the static circuit parameters with those obtained directly from the full wave method, the available condition of the static circuit parameters of the step microstrip line can be analyzed. This comparison shows that the static circuit parameters can be used in frequency bands from DC up to 20 GHz. To verify the accuracy of the static parameters used to predict the transmission characteristics of step line, the measured S11 is also given for comparison.

[1]  R. Mittra,et al.  A hybrid time-domain technique that combines the finite element, finite difference and method of moment techniques to solve complex electromagnetic problems , 2004, IEEE Transactions on Antennas and Propagation.

[2]  Hui Zhang,et al.  Study on the Applicability of the Static Distributed Circuit Parameters of Non-uniform Microstrip Lines , 2007 .

[3]  Zengrui Li,et al.  Determination of distributed circuit parameters of non-uniform transmission line by studying the transient behavior of reflected current , 2003, 6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003.

[4]  Raj Mittra,et al.  A finite element cavity resonance method for waveguide and microstrip line discontinuity problems , 1994 .

[5]  Melinda Piket-May,et al.  9 – Computational Electromagnetics: The Finite-Difference Time-Domain Method , 2005 .

[6]  Hui Zhang,et al.  Study on the Applicability of Extracted Distributed Circuit Parameters of Non-Uniform Transmission Lines by Equivalent Circuit Method , 2008 .

[7]  K. K. Mei.  From Kirchoff to Lorentz modifying-circuit theory for microwave and mm-wave structures , 2000, 25th International Conference on Infrared and Millimeter Waves (Cat. No.00EX442).

[8]  Krzysztof Nyka,et al.  MULTILEVEL MODEL ORDER REDUCTION WITH GENERALIZED COMPRESSION OF BOUNDARIES FOR 3-D FEM ELECTROMAGNETIC ANALYSIS , 2013 .

[9]  Xing Feng.  Equivalent circuit of rectangular waveguide based on the generalized transmission line equation , 2004 .

[10]  M. Clemens,et al.  Discrete Electromagnetism With the Finite Integration Technique - Abstract , 2001 .

[11]  Yong Wang,et al.  AN EQUIVALENT CIRCUIT MODELING METHOD FOR ULTRA-WIDEBAND ANTENNAS , 2008 .

[12]  T. Tuovinen,et al.  Impedance Dependency on Planar Broadband Dipole Dimensions: an Examination with Antenna Equivalent Circuits , 2014 .

[13]  Shiwen Yang,et al.  SIMULATION OF TIME MODULATED LINEAR ANTENNA ARRAYS USING THE FDTD METHOD , 2009 .

[14]  Jose A. Encinar,et al.  Enhanced MoM Analysis of the Scattering by Periodic Strip Gratings in Multilayered Substrates , 2013, IEEE Transactions on Antennas and Propagation.

[15]  M. Khalaj Amirhosseini.  DETERMINATION OF CAPACITANCE AND CONDUCTANCE MATRICES OF LOSSY SHIELDED COUPLED MICROSTRIP TRANSMISSION LINES , 2005 .

[16]  Yaowu Liu,et al.  Generalized transmission line equations , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).

[17]  Yaowu Liu,et al.  Analysis of a double step microstrip discontinuity using generalized transmission line equations , 2003 .

[18]  S. Ebadi,et al.  Extraction of equivalent circuit model parameters of the feedless rectangular microstrip patch , 2013, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI).

[19]  Hui Zhang,et al.  Study on the distributed capacitance and inductance of ladder-type lossless microstrip lines , 2013, 2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference.

[20]  Agostino Monorchio,et al.  A space-time discretization criterion for a stable time-marching solution of the electric field integral equation , 1997 .

[21]  Wei Hong,et al.  Analysis of nonuniform coupled transmission lines using generalized transmission line equations , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.