Biomedical

Path Gain and SAR Analysis of On-Body Antenna Optimized for Hearing Instrument Applications

Path Gain and SAR Analysis of On-Body Antenna Optimized for Hearing Instrument Applications

This presentation describes the simulation of a hearing instrument (HI) device. The design was simulated in the presence of a homogeneous SAM phantom and an anatomically correct, heterogeneous head model. The simulation results illustrate the differences between the head models and highlight the more acceptable results for improved device safety.

Fast Estimate of Thermal Responses of Biological Bodies due to RF Exposure

Fast Estimate of Thermal Responses of Biological Bodies due to RF Exposure

A fast approach is proposed for estimating the thermal responses of biological bodies due to RF exposures. The approach is based on ANN models. The results obtained from the fast approach agree well with those calculated directly from the thermal solver. The advantage is that the approach is fast and is not dependent on the biological body and mesh sizes.

Case Study: Using Electromagnetic Simulation to Ensure EMC Compliance

Case Study: Using Electromagnetic Simulation to Ensure EMC Compliance

KEC, a UK manufacturer of EMC interconnect components and cable harness assemblies, strengthened its market leadership and differentiated itself from the competition by offering a unique technology. Using Remcom’s XFdtd to model and simulate customers’ designs, KEC can identify problems early in the process and recommend corrections before the EMC certification stage. This enables customers to avoid costly mistakes and pass certification testing on the first try.

A Study on the Feasibility of the Deep Brain Stimulation (DBS) Electrode Localization Based on Scalp Electric Potential Recordings

A Study on the Feasibility of the Deep Brain Stimulation (DBS) Electrode Localization Based on Scalp Electric Potential Recordings

In this work, we studied with numerical simulations the principle of extracting the DBS electrical pulse from the patient’s EEG – which normally constitutes an artifact – and localizing the source of the artifact (i.e., the DBS electrodes) using EEG localization methods.

Case Study: How Remcom Consulting Helped ReGear Launch a Deep Tissue Heating Device

Case Study: How Remcom Consulting Helped ReGear Launch a Deep Tissue Heating Device

When ReGear Life Sciences developed a new therapeutic deep heating garment for the shoulder, they needed to validate that the SAR value complied with all applicable FDA and FCC safety regulations before releasing the product to the market. Remcom performed EM simulations, made recommendations on a safer design, and provided the documentation necessary for ReGear to get approval for the product.

Electromagnetic Simulation Used to Evaluate Safety of Combining EEG and MRI

Electromagnetic Simulation Used to Evaluate Safety of Combining EEG and MRI

Electromagnetic simulation software is being used to investigate the safety of an important research technique that integrates electroencephalography (EEG) with magnetic resonance imaging (MRI). The integration of these two analysis methods has the potential to improve investigations of brain activity because EEG offers high temporal resolution while MRI offers high spatial resolution. But concerns have arisen about temperature increases in sensitive brain tissues that could be caused by the current induced in the EEG electrodes by the radio frequency (RF) power generated by MRI. 

Study of the Coupling Between Human Head and Cellular Phone Helical Antennas

Study of the Coupling Between Human Head and Cellular Phone Helical Antennas

The interaction between normal-mode helical antennas and human head models is analyzed, using both a novel accurate semi-analytical method and finite-difference time-domain (FDTD) simulations. The semi-analytical method is based on the combination of Green’s functions theory with the method of moments (Green/MoM) and is able to model arbitrarily shaped wire antennas radiating in the close proximity of layered lossy dielectric spheres representing simplified models of the human head. 

Bandwidth, SAR, and Efficiency of Internal Mobile Phone Antennas

Bandwidth, SAR, and Efficiency of Internal Mobile Phone Antennas

This paper presents a thorough investigation into the effects of several phone chassis-related parameters—length,width, thickness, and distance between the head and phone—on the bandwidth, efficiency, and specific absorption rate (SAR) characteristics of internal mobile phone antennas. The studied antenna-chassis combinations are located beside an anatomical head model in a position of actual handset use.

Comparison of FDTD-Calculated SAR in Adults and Children When Using a Mobile Phone at 900 and 1800 MHz

Comparison of FDTD-Calculated SAR in Adults and Children When Using a Mobile Phone at 900 and 1800 MHz

In this paper, the specific absorption rate (SAR) in scaled human head models is analysed to study possible differences between SAR in the heads of adults and children and for assessment of compliance with the international safety guidelines, while using a mobile phone.Click on the title to view or download this publication.