Modeling of Complex Rf/wireless Structures Using Computationally Optimized Time-domain Techniques

Modeling and Design of RF MEMS Structures Using Computationally Efficient Numerical Techniques

The modeling of MEMS structures using MRTD is presented. Many complex RF structures have been inadequately studied due to limitations in simulation methods. The space and time adaptive grid, as well as the ability to handle intracell feature variations, makes MRTD an ideal method for modeling these structures. MRTD is shown to be able to handle the complex structures found in modern wireless an...

Novel adaptive time-domain techniques for the modeling and design of complex RF and wireless structures

DAMAGE DETECTION OF BRIDGE STRUCTURES IN TIME DOMAIN VIA ENHANCED COLLIDING BODIES OPTIMIZATION

In  this  paper,  a  method  is  presented  for  damage  detection  of  bridges  using  the  Enhanced Colliding Bodies Optimization (ECBO)  utilizing time-domain responses. The finite element modeling of the structure is based on  the equation of motion under the moving load, and the flexural stiffness of the structure is determined by the acceleration responses obtained via sensors placed in d...

Coupling of Electromagnetic Time-Domain Simulators with DSP/Subgridding Techniques for the Adaptive Modeling of Wireless Packaging Structures

The modeling of packaged modules that involve irregular metal shapes and lossy, dispersive materials requires design algorithms that combine the computational efficiency with the numerical accuracy over wide frequency bands. This paper presents the formulation of a hybrid FDTD method integrating a quasi-static subgridding algorithm and employing digital predictors. Three techniques of DSP-based...

RF TESTING AND MODELING OF WIRELESS COMMUNICATION DEVICES AND ICs

Rapid development of high frequency devices and IC technologies for wireless communication products created many opportunities and challenges in RF testing, packaging and modeling. In this paper we review these challenges and show trends in the test and modeling technologies to meet the demand. Different approaches for studying largesignal performance of high frequency circuits, incorporating w...