Smart(er) Healthcare: Designing RFID Tags for Biomedical Applications

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.

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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.

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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.

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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.

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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.

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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.

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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…

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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.

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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…

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Bridget Cunningham August 3, 2017

There are many ways to improve the frequency response of frequency-selective surfaces. However, optimizing these structures can require multiple steps. Every change to a design parameter — unit cell type, polarization, substrate properties, etc. — needs the expertise of simulation engineers. Simulation apps enable those with little or no simulation experience to run analyses for their specific stage of the design process on their own.

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Jiyoun Munn July 19, 2017

When simulating electromagnetic devices, a common mistake is putting everything into a model at the same time, including a complicated geometry, complex material properties, and a mixed bag of boundary conditions. This makes the model run for a long time and you might get frustrated when your simulation results are physically wrong, without any clues as to why. Today, we will discuss how to efficiently set up simple RF, microwave, and millimeter-wave circuit models in the COMSOL Multiphysics® software.

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