How to Couple Radiating and Receiving Antennas in Your Simulations

Andrew Strikwerda January 18, 2017

In Part 3 of our series on multiscale modeling in high-frequency electromagnetics, let’s turn our attention to the receiving antenna. We’ve already covered theory and definitions in Part 1 and radiating antennas in Part 2. Today, we will couple a radiating antenna at one location with a receiving antenna 1000 λ away. For verification, we will calculate the received power via line-of-sight transmission and compare it with the Friis transmission line equation that we covered in Part 1.

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Andrew Strikwerda January 12, 2017

In Part 2 of our blog series on multiscale modeling in high-frequency electromagnetics, we discuss a practical implementation of multiscale techniques in the COMSOL Multiphysics® software. We will simulate radiated fields using two different techniques and verify our results with theory. While these methods can be generally applied, we will always revolve around the practical issue of antenna-to-antenna communication. For a review of the theory and terms, you can refer to the first post in the series.

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Andrew Strikwerda January 11, 2017

This post begins a comprehensive blog series where we will look at several approaches to multiscale modeling in high-frequency electromagnetics. Today, we will introduce the supporting theory and definitions that we will need. In subsequent posts, you will learn how to implement multiscale modeling of high-frequency electromagnetics for different scenarios in the COMSOL Multiphysics® software. Let’s get started…

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Jiyoun Munn October 31, 2016

To keep our antenna modeling process efficient and accurate, we should start with a simple geometry and then gradually add more complex features. The final simulation needs to include enough detail to accurately represent our design, while excluding elements that needlessly increase the computational cost. To demonstrate this, we look at an anechoic chamber example, which is used to characterize antenna performance, before examining how this process applies to several antenna examples available in the COMSOL Multiphysics® software.

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Bridget Paulus August 8, 2016

Imagine a vehicle where you could simply plug in a destination and arrive without ever having to touch the steering wheel. Fully autonomous cars would revolutionize society, benefiting those who already drive and increasing the mobility of those who can’t. While technological advancements have brought us closer to such a reality, there are still many challenges to overcome. Today, we’ll explore the future of autonomous cars and what needs to happen before they can become a viable option.

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Jiyoun Munn July 4, 2016

When designing bandpass-filter type high-Q devices with the finite element method in the frequency domain, you will likely come across a situation where you need to apply many frequency samples to more accurately describe the passband. Simulation time is directly proportional to the number of frequencies included in the simulation of a microwave device, with the time increasing as the frequency resolution used becomes finer. Two powerful simulation methods in the RF Module help accelerate the modeling of such devices.

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Jiyoun Munn June 1, 2016

The 5G mobile network and Internet of Things (IoT) are two hot topics in the RF and microwave industry. New developments in these wireless applications call for much higher data rates, active electronically scanned arrays (AESA), phased array antennas, and multiple-input-multiple-output (MIMO) technology. It is important to reduce the time and cost during the process of prototyping and manufacturing these applications. Using simulation and apps, we can streamline the development cycle of wireless communication designs.

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Andrew Strikwerda May 26, 2016

It is always important to choose the correct tool for the job, and choosing the correct interface for high-frequency electromagnetic simulations is no different. In this blog post, we take a simple example of a plane wave incident upon a dielectric slab in air and solve it in two different ways to highlight the practical differences and relative advantages of the Electromagnetic Waves, Frequency Domain interface and the Electromagnetic Waves, Beam Envelopes interface.

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Brianne Costa May 18, 2016

Think about the “ideal” wireless network. Data would download at ultrafast rates. We could be connected anywhere in the world and expect quality performance every time we use our devices. An ideal wireless network would be, above all, reliable — no dropped calls, undelivered messages, or waiting for a web page to open. To meet the specific performance requirements of this ideal network, 5G, there are certain RF designs that engineers can consider to transform such technology into a reality.

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Andrew Strikwerda February 9, 2016

Electrical cables are classified by parameters such as impedance and power attenuation. In this blog post, we consider a case for which analytic solutions exist: a coaxial cable. We will show you how to compute the cable parameters from a COMSOL Multiphysics simulation of the electromagnetic fields. Once we understand how this is done for a coaxial cable, we can then compute these parameters for an arbitrary type of transmission line or cable.

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Brianne Costa November 26, 2015

Locating and removing landmines and other improvised explosive devices (IEDs) is an important yet challenging task, especially with new advancements in cloaking technology. Using COMSOL Multiphysics® software, one team of researchers studied electromagnetic detection for subsurface objects to better understand the technique and improve its accuracy.

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