Studying the Decoupling Effect of Electromagnetic Band Gap Structures

Bridget Paulus May 16, 2018

Thanks to their ability to “tune out” specific frequencies, electromagnetic band gaps (EBGs) are found in many different applications. EBGs can suppress unwanted electromagnetic interference (EMI) and increase electromagnetic compatibility (EMC). These structures are commonly used between nearby antennas, which can help minimize undesirable coupling and thereby enhance their performance. However, using an EBG isn’t always a guarantee for better antenna isolation. To analyze the effectiveness of an EBG, engineers can use the COMSOL Multiphysics® software and add-on RF Module.

Ler Mais

Categorias

Thomas Forrister May 3, 2018

Many antennas deployed in basic communications systems are linearly polarized, meaning that for the orientation of the electric field, polarization is confined to a single plane. Antennas that present the option of circular polarization give you more to work with, because the polarization of the wave varies while it propagates. Helical antennas, for instance, are able to generate circularly polarized waves in the axial operating mode. RF simulation can be used to optimize helical antenna designs.

Ler Mais

Categorias

Brianne Costa April 19, 2018

When it comes to advancements in healthcare, we have a lot to be thankful for. Because of anesthesia, patients no longer need to “bite the bullet” during surgery. Thanks to antibiotics, doctors don’t use bloodletting to cure an infection. Moving into more modern times, radio-frequency identification (RFID) systems offer a wide variety of innovative healthcare applications. However, like any new medical technology, biomedical RFID devices must be rigorously evaluated for performance and compatibility with other medical systems.

Ler Mais

Categorias

Caty Fairclough April 10, 2018

Since their development in the 1960s, subminiature version A (SMA) connectors have become a staple in the RF and microwave industries. The use of these connectors is so widespread, they might even be the most popular RF and microwave connector systems on Earth. To evaluate the performance of an SMA connector, engineers can use the COMSOL Multiphysics® software.

Ler Mais

Categorias

Jiyoun Munn April 3, 2018

Since high-speed communication is inevitable for evolving wireless systems, the demand for a higher data rate, higher frequency, larger spectrum, and wider bandwidth increases. When dealing with a wide bandwidth, multiple devices may have to be deployed in a wireless communication system to filter out unwanted noise and interfering signals, enhance the signal-to-noise ratio, and improve the sensitivity. A single tunable filter can replace these devices, reducing the system’s size and weight and the fabrication cost of multiple components.

Ler Mais

Categorias

Caty Fairclough February 21, 2018

Due to their inherent versatility and wideband frequency response, spiral slot antennas have a variety of applications for different microwave frequency bands. For example, these antennas are used for wireless communication, sensing, positioning, and tracking. To optimize the design of spiral slot antennas, engineers can use electromagnetics analysis to accurately calculate characteristics such as S-parameters and far-field patterns.

Ler Mais

Categorias

Caty Fairclough December 12, 2017

It’s a bird, it’s a plane, it’s…the future of data sharing? Satellites orbiting Earth have the potential to revolutionize how we collect and share information. Instead of wired or wireless data networks, satellites could form the basis of an Internet of Space (IoS) to connect even the most remote locations.

Ler Mais

Categorias

Caty Fairclough October 23, 2017

Engineers use signal integrity (SI) analyses to generate information on the quality of electrical signals. They can then make design improvements based on this information. A useful technique for SI applications is time-domain reflectometry (TDR), which finds discontinuities in signal paths. Here, we use simulation to perform TDR analyses for two different designs: a high-speed interconnect and a set of parallel microstrip lines.

Ler Mais

Categorias

Bridget Paulus October 20, 2017

Extraordinary optical transmission (EOT) is an important process in terahertz applications. Developing EOT applications could lead to improvements in medical imaging, quality assurance, and more. To study this phenomenon, researchers simulated EOT devices with different array geometries and material properties. The simulation results were compared and validated with measured data. Let’s take a look at their work…

Ler Mais

Categorias

Caty Fairclough September 12, 2017

When thinking about natural selection, antennas are probably not the first thing that comes to mind. But with genetic algorithms, we can use the basic principles of natural selection to solve antenna optimization problems. For example, genetic algorithms enabled one research group to optimize the geometry of an optical antenna. They implemented their study by using LiveLink™ for MATLAB®, an add-on product to the COMSOL Multiphysics® software.

Ler Mais

Bridget Cunningham August 14, 2017

Compliance testing is used to ensure that various products, processes, and systems meet standard requirements. Just as important as these tests is the equipment used to perform them. This testing equipment must be designed so that it delivers precise measurements that are reflective of real-world performance. RF modeling is a useful approach to analyzing and optimizing such devices, generating greater confidence in the measurements they obtain. To showcase this, we’ll look at a well-known equipment choice in EMC/EMI testing…

Ler Mais

Categorias


Categorias


Tags

1 2 3 8