The Applications Examples library contains a variety of demonstrations that explain how Remcom engineers solved problems in categories ranging from antenna design and placement, biomedical, wireless communications, microwave circuits, radio wave propagation, and more.
An antenna based on a transverse slotted rectangular waveguide design is realized in a substrate integrated waveguide structure and simulated in XFdtd® EM Simulation Software. The antenna scans narrow beams from near broadside to near end fire as a function of frequency. The antenna performance in terms of S-parameters, gain patterns, and radiation efficiency are determined.
A 60 GHz antenna array design is simulated in XFdtd to demonstrate suitability for use on wireless Virtual Reality headsets. The antenna array is comprised of elements each containing two patches and a parasitic element. The resulting array produces a fan beam which may be steered by varying the phasing between the elements resulting in broad coverage. The final design is simulated mounted on a section of a virtual reality visor.
This example uses XFdtd to simulate the performance of a low cost, chipless RFID system. The RFID tag is comprised of two ultrawide band monopole disk antennas mounted in a cross-polarized configuration combined with a microstrip line adjacent to six varying size spiral resonators which each represent a single bit in the RFID tag code. The system is validated using two cross-polarized log periodic dipole arrays as the send and receive devices.
This example is a more complete device for 28 GHz beamforming for 5G networks and includes an 8x8 patch antenna array, 1 to 8 power dividers and a Rotman lens initial stage. The design of the Rotman lens is performed using Remcom’s Rotman Lens Designer® (RLD) software, which produces a CAD version of the device for use in XFdtd®. In XFdtd, a set of eight 1 to 8 Wilkinson stripline power divider networks is designed to act as the connection between the Rotman lens and the antenna array. The performance of each stage is simulated and evaluated.
This example demonstrates how a custom beamforming table can be used to model downlink data rates from three MIMO base stations for 5G New Radio in a section of Boston.
A proposed smartphone design that includes a 4G antenna operating at 860 MHz and a 5G array at 28 GHz is analyzed in XFdtd to determine operating characteristics and any mutual coupling. A brief study of configurations is performed to find the best positioning for each antenna.
An 8x8 planar antenna array creates narrow beams capable of scanning large sectors in front of the antenna. This example focuses on displaying typical simulation results for beams and possible plots of coverage from the full array and combinations of sub-arrays.
Series-fed patch elements forming an array are simulated to demonstrate antenna performance and beamforming including S-parameters, gain, and effective isotropic radiated power (EIRP) at 28 GHz. Beam steering is performed in one plane by adjusting the phasing at the input ports to each of eight elements.
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 in XFdtd for varying hand hold positions on the device. The results computed include S-parameters, Gain, Efficiency and Envelope Correlation Coefficient.
The following example investigates WiFi throughput coverage in a house provided by 802.11ac routers operating at 5 GHz using an 80 MHz bandwidth. The geometry for the house was imported from a CAD file and a flat terrain was placed underneath the house.
This example details the setup and execution of RCS calculations using XGtd’s X3D PO MEC model and compares the predictions to those made using XFdtd.
Simulations are performed on a reconfigurable 12-element antenna which produces vertically and horizontally polarized gain patterns and is intended for base station use.
The millimeter wave frequencies being planned for 5G systems pose challenges for channel modeling. At these frequencies, surface roughness impacts wave propagation, causing scatter in non-specular directions that can have a large effect on received signal strength and polarization. To accurately predict channel characteristics for millimeter wave frequencies, propagation modeling must account for diffuse scattering effects. Wireless InSite’s diffuse scattering capability is based on Degli-Esposti’s work.
In this example the signal transmission between a massive MIMO base station and a mobile device located in downtown Rosslyn is analyzed using Wireless InSite’s MIMO capability.
This example analyzes the coupling between four circular patch antennas mounted on the sides of a Boeing 757. The antennas transmit and receive at a frequency of 2.4 GHz. Coupling between each antenna is characterized using XGtd’s S-Parameter output, which can be displayed in the user interface or exported to a v1.1 Touchstone file.
Ad hoc peer-to-peer networks can provide reliable communications in emergency situations where fixed infrastructures, like base stations, may not be available. This example demonstrates Wireless InSite's Transceivers capability.
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.
The capacitance matrices for a 3x4 touchscreen are analyzed in an unloaded and loaded case. Based on the changes in capacitance, the location of the 1 mm stylus is identified.
Crosshole Ground Penetrating Radar is examined in XFdtd. The ability to find COP and MOG data is shown.
An antenna design for hepatic microwave ablation is simulated in a dielectric emulating liver tissue to determine antenna performance, SAR distribution, and thermal response.
A lowpass birdcage coil designed to operate at 64 MHz is simulated to show B fields in both unloaded and loaded conditions. When loaded with a heterogeneous human head model, the temperature rise caused by exposure to the fields of the coil is computed using XFdtd’s biological thermal sensor.
The performance of a basic cellular telephone worn on the hip of a human male is studied for varying positions of the wearer.
In this example a simple PIFA antenna is simulated and the return loss validated against measured data.
In this example, the impacts of a lightning strike on a simplified wind turbine are compared for different strike locations by comparing the magnetic fields created inside the nacelle.
Wireless InSite can model Maximum Permissible Exposure (MPE) to determine if there is a hazard to personnel from a particular high-power EM source. This output is displayed as color coded hazard zones within the GUI of Wireless InSite.
Remcom’s Wireless Insite provides a way to handle uncertainty in a scenario through the use of Monte Carlo parameters for elements within the scenario. This example demonstrates how to utilize Monte Carlo materials within Wireless InSite to vary material properties quickly and efficiently.
Wireless InSite has a hybrid method that combines the full 3D ray tracing model (X3D) with an empirical model called COST 231 to handle uncertainty with the interior layout of a floor plan. This example demonstrates setting up a typical scenario using the hybrid method.
Wireless InSite provides an efficient , powerful way to analyze a multiple input scenario within an urban environment. This example demonstrates how to utilize Wireless InSite’s Communication Systems Analyzer to calculate total combined power and strongest transmitter for an urban environment.
Remcom’s MPI+GPU technology and large memory support are used to simulate an inter-vehicle communication system operating in traffic on a highway. This example demonstrates how massive electromagnetic design problems become tractable while still using the high resolution offered by an FDTD simulation.
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