RF Modeling in COMSOL Multiphysics®

August 16–19, 2022 11:00 a.m. EDT

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You are invited to join us for an online training course to advance your skills in multiphysics simulation. During this 4-day course, you will see the capabilities and workflow of the COMSOL Multiphysics® software and learn how to use the RF and Wave Optics modules.

Day 1: Modeling Resonant Structures, Waveguides, and Transmission Lines

Setting Up Models with the RF Module

In this session, you will learn how to set up mathematical models of devices such as antennas, waveguides, filters, circuits, cavities, and metamaterials using the RF Module. We will demonstrate how to model different types of excitation, such as plane wave, dipole wave, and cylindrical wave excitation. You will also learn how to use the Port condition to excite a waveguide structure, evaluate scattering parameters, and plot E field propagation for different phases without recomputing the model.

Modeling Resonant Structures

In this session, you will learn how to model resonant structures. We will evaluate the resonant frequency and quality factor of closed- and open-cavity structures by solving the eigenvalue problem. We will discuss applications such as microwave cavities, optical resonators, and coil resonance structures.

Modeling Waveguide and Transmission Lines

You will also learn an approach for modeling RF waveguides and transmission lines, including how to use propagation constants, impedance, and S-parameters to characterize waveguides and transmission lines. We will discuss the time-harmonic transmission line equation for the electric potential for electromagnetic wave propagation along one-dimensional transmission lines. You will also learn an approach for modeling time-domain reflectometry and signal integrity analysis.

Day 2: Modeling Passive Devices, Couplers, Filters, and Antennas

Modeling Passive Devices, Couplers, and Filters

In this session, you will learn an approach for modeling passive devices, RF/microwave couplers, and filters. We will discuss an approach for combining resonant structures and transmission lines, as well as how to quantify the electric and magnetic field distribution, impedance, and S-parameters. The application areas include 3-dB couplers, power dividers, and band pass filters.

Modeling Radiating Systems and Antennas

In this session, you will learn the process for modeling transmitting and/or receiving radiated electromagnetic energy devices. We will discuss the use of the Impedance boundary condition to take into account the skin effect at a very high frequency and how to efficiently model different types of antennas. We will also introduce the use of perfectly matched layers (PMLs) in order to truncate modeling domains effectively. We will also discuss various geometry and meshing techniques needed while considering PML. You will learn how to quantify far-field patterns, losses, gain, directivity, impedance, and S-parameters. The application areas consist of microstrip patch antennas, Vivaldi antennas, and dipole antennas.

Day 3: Modeling Scatterers, Periodic Structures, and Dispersive Materials

Scattering Analysis

In this session, we will discuss how the background electromagnetic field of a known shape, such as a plane wave, interacts with various materials and structures. We will show how to quantify the scattering cross section, absorption cross section, and the associated losses. You will also learn how to visualize the total fields and scattered fields. The major applications involve Mie scattering and radar cross section (RCS) calculations.

Modeling Periodic Structures

In this session, you will learn an approach for modeling periodic structures that repeat in one, two, or all three directions. You will learn an approach for analyzing a single unit cell with Floquet periodic boundary conditions. The application areas involve optical gratings, frequency selective surfaces, and electromagnetic band gap structures.

Dispersive and Frequency-Dependent Materials

In this session, you will learn an approach for modeling harmonics via a transient wave simulation using nonlinear material properties. We will showcase the modeling capability of the full time-dependent wave equation in dispersive media such as plasmas and semiconductors. You will also learn an approach for modeling linear material models described by a sum of Drude–Lorentz resonant terms.

Day 4: Modeling Optical Devices and Multiphysics EM Analysis

Introduction to Wave Optics

In this session, we will cover modeling optical devices in COMSOL Multiphysics®, including capturing optical phenomena such as diffraction, convergence, divergence, scattering, coupling, and more. We will talk about the innovative beam envelope method (BEM), which can be used to model optical systems with geometries substantially larger than the wavelength using the Wave Optics Module.

Modeling Optical Fibers

In this session, you will learn how to model optical fibers and observe different modes of propagation that may exist, along with attenuation losses. In addition, you will learn how to model a fiber bend in a 2D axisymmetric geometry and evaluate its bending losses.

Modeling Multiphysics Electromagnetics Analysis

In this session, you will learn how an electromagnetic wave interacts with any loss materials. We will observe how the losses lead to a rise in temperature over time. We will showcase an approach for performing bidirectionally coupling with the thermal equation with any losses computed from solving the electromagnetic problem. The application areas include thermal drift in a cavity filter, microwave ovens, absorbed radiation in living tissue, tumor ablation, effects of deformation on the modes of propagation, and stress-optical effects.

Some or all of the above topics will be considered according to the length of the course and the interests of the participants.

Suggested Background

This course assumes some familiarity with the basic concepts of electrical engineering. We recommend that those new to COMSOL Multiphysics® take the COMSOL Multiphysics® Intensive course prior to attending this class.

Pricing & Payment Methods

The price for this 4-day course is $795 per person.

We offer an academic discount to those who qualify. The academic rate for this course is $595.

We accept payment by credit card, company purchase order, check, wire, or direct deposit. For security purposes, please do not send credit card information via email.

This training course will be recorded, and the recording will be made available to all paid registrants.

Mail payments or purchase orders to:

100 District Avenue
Burlington, MA 01803

Fax purchase orders to:

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Please review our course cancellation/return policies. For additional information, please email info@comsol.com.

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Training Course Details

Local Start Time:
August 16–19, 2022 | 11:00 a.m. EDT (UTC-04:00)
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Andrew Strikwerda
Lead Application Engineer

Andrew Strikwerda is a lead application engineer at COMSOL specializing in electromagnetics. He received his PhD in physics from Boston University and conducted postgraduate research at the Technical University of Denmark. He was a senior staff scientist at the Johns Hopkins University (JHU) Applied Physics Laboratory and taught in the JHU Whiting School of Engineering.