Antenna Design and Analysis
Antenna technology is constantly advancing to meet the growing demands of industry. Likewise, Remcom has been keeping pace in order to provide engineers with a tool that matches their processes and helps them meet their design requirements.
Our customers’ interests range from simple academic examples to the latest cellular devices containing multiple antennas and hundreds of components. Models can be analyzed in XFdtd for efficiencies, dissipated power, SAR, radiation patterns, reflection coefficients and more. Plus, XFdtd embraces parametric analysis and exploits the computational power of GPUs.
Performance of a 12-port handset antenna array operating in LTE bands 42/43 (3400-3800 MHz) and band 46 (5150-5925 MHz) is analyzed for varying hand hold positions on the device. The results computed include S-parameters, Gain, Efficiency and Envelope Correlation Coefficient.
Simulations are performed on a reconfigurable 12-element antenna which produces vertically and horizontally polarized gain patterns and is intended for base station use.
A simple antenna for LTE band operation is added to the PC board of a smartphone in XFdtd and the matching circuit is tuned for operation in multiple frequency bands. The component values in the matching network are chosen to maximize system efficiency.
XFdtd's Circuit Element Optimizer is used to determine optimal matching component values for a dual purpose antenna.
Full wave matching circuit optimization (FW-MCO) is a new technology that combines full wave, 3D EM simulation with circuit optimization into a novel approach for solving an age-old RF problem: determining which component values provide the desired match for a given matching network layout. This article describes the design process using the design of a matching circuit for a GPS-Bluetooth antenna.
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.
This study considers the example of designing a broadband antenna for an unattended ground sensor using XFdtd. To address the challenge of attaining acceptable performance over both dry and wet ground conditions, we use Particle Swarm Optimization (PSO). XStream GPU Acceleration and MPI + GPU technology make this type of sophisticated simulation strategy possible, completing multiple optimizations with hundreds of generations to converge on the best values.
This application note from the January 2013 issue of Microwave Journal demonstrates the process of adding an electrically steerable, conformal antenna array to the body of a high speed missile. By leveraging XF’s XStream GPU Acceleration, a complex 3D simulation including multiple array elements with curved surfaces that could take several hours was completed within a few minutes.
The design of a matched antenna is a fairly involved process. This webinar shows how XFdtd simplifies this process by providing tools to parameterize the unmatched antenna, determine S11, synthesize a matching network topology with Optenni Lab, and determine the final component values using the Circuit Element Optimizer.
Remcom’s Circuit Element Optimizer for XFdtd is a unique tool for full wave matching circuit optimization. This webinar introduces the capability and provides an example of how it is used. A GPS/Bluetooth antenna and an LTE antenna are used for the demonstration.
This video gives a demonstration of Full-Wave Antenna Matching Circuit Optimization using XFdtd's Circuit Element Optimizer (CEO). The antenna matching circuit design flow is discussed, including CEO's analysis of a given PCB layout. Predicted S-parameters and optimal component value results for two different frequency bands are also shown.
This getting started video details the triangle geometry construction of a bow tie antenna in XFdtd, including the component placement of a voltage source driving the antenna.
This video demonstrates antenna radiation far field pattern results viewing, including 3D view and 2D cutplane plots, in XFdtd.
This video uses several examples to demonstrate XFdtd's various meshing techniques: 2D Cutplane Mesh Views, 3D Mesh Cropping, and XACT Accurate Cell Technology for curved geometries.