Coupled-Mode Analysis of Coupled Microstrip Transmission Lines Using a Singular Perturbation Technique

Coupled-mode Analysis of Line Parameters of Coupled Microstrip Lines

Near-Optimal Controls of a Fuel Cell Coupled with Reformer using Singular Perturbation methods

A singularly perturbed model is proposed for a system comprised of a PEM Fuel Cell(PEM-FC) with Natural Gas Hydrogen Reformer (NG-HR). This eighteenth order system is decomposedinto slow and fast lower order subsystems using singular perturbation techniques that provides tools forseparation and order reduction. Then, three different types of controllers, namely an optimal full-order,a near-opti...

Delay Analysis of Coupled Transmission Lines

In this paper, we analyze coupled transmission lines and obtain a relationship between the moments of the coupled transfer functions. We then derive expressions for the first and second moments of the coupled transfer function which can be used to compute the response and threshold delays under various input excitations. We can compute the interconnectdelay under parasitic coupling effects by u...

Spice Compatible Model for Multiple Coupled Nonuniform Transmission Lines Application in Transient Analysis of VLSI Circuits

An SPICE compatible model for multiple coupled nonuniform lossless transmission lines (TL's) is presented. The method of the modeling is based on the steplines approximation of the nonuniform TLs and quasi-TEM assumptions. Using steplines approximation the system of coupled nonuniform TLs is subdivided into arbitrary large number of coupled uniform lines (steplines) with different characteristi...

Enhanced Balance Bandwidth Quadrature Coupler Using Parallel Coupled Microstrip Lines

A single stage quadrature hybrid coupler with enhanced flat balance over a wide bandwidth is presented in this article. The present coupler is realized by replacing the transmission line sections of the conventional two-branch coupler by their equivalent parallel coupled microstrip lines (PCML). The impedance controlled wide-bandpass response produced by the PCML is utilized to achieve flat bal...