Prof. Cassella currently teaches the following classes:
EECE 2210: Electrical Engineering (Spring Semester)
Introduces the basic circuit laws used in the study of linear circuits. It starts with the presentation of the most common circuit components (R, C, L dependent and independent current/voltage sources). It proceeds with basic circuit analysis involving resistive networks and relying on the use of commonly adopted analysis techniques, such as nodal-voltage and mesh-current methods. It explains the operation of frequency used methods for linear circuit simplifications, such as the superposition method and the Thevenin/Norton theorems. It explains the operation of the ideal operational amplifiers and their use to exploit several functionalities. After learning how to analyze basic circuits excited by constant voltage/current sources, the course provides methods to study the operation of the circuits driven by time-variant voltage/current sources, through the use of phasors. It concludes with an overview of the Fourier theory allowing to analyze circuits subject to generic periodic signals. The course includes a brief discussion about transient behaviors in reactive linear circuits.
EECE 7398: Advanced RF Passive Technologies (Fall Semester)
The course discusses the methodologies to synthesize and model the operation of two key passive components currently employed in commercial Radio Frequency (RF) front-ends. First, the theory and operation relative to the most adopted antennas are discussed through analytical methods. The radiation and electrical characteristics relative to i) dipole antennas, ii) loop antennas, iii) aperture antennas, iv) planar antennas (Paych/PIFA/Inverted F) and v) arrays of antennas will be discussed. Then, after reviewing the main theoretical features characterizing the propagation of elastic waves in solids, the operation of acoustic passive technologies currently employed in commercial multiplexers will be analyzed. Such components, which enable multi-band radios in telecommunication platforms, rely on acoustic waves excited in coupled piezoelectric resonators. The operation, design methodologies and equivalent circuit representations relative to Surface Acoustic Wave (SAW) cavity-resonators and filters will be presented. The analysis of 1-port and 2-port SAW networks through i) delta-function model; ii) MBVD model; iii) p-matrix; iv) Mason model is discussed. Then, the design and operation of Film-Bulk-Acoustic-Resonators (FBARs) are discussed through their i) MBVD model ii) Mason model and iii) Dispersion analysis. Finally, filtering architectures based on electrically or mechanically coupled SAW/FBAR resonators will be presented.