Publications

  1. Wearable Dual-Band MIMO Antenna
    11/8/2019

    This example demonstrates a possible wearable antenna design for dual-band use constructed of textile materials. The performance of the antenna remains acceptable as it is deformed as might happen in actual usage cases. When combined in a MIMO array, the antennas show good isolation and acceptable antenna performance.

  2. Simulation Of Electrostatic Discharge (ESD) Testing With XFdtd
    6/17/2019

    The ability to simulate the ESD testing process and pinpoint locations in wireless devices susceptible to ESD damage would be extremely valuable and allow engineers to reduce the number of prototypes required to design products for minimal ESD damage. This presentation from the 2019 IEEE MTT-S NEMO conference summarizes a number of ESD simulation features in XFdtd. 

  3. Simulating A Beam Scanning Substrate Integrated Waveguide Leaky Wave Antenna In XFdtd
    6/14/2019

    In this example, XFdtd is used to simulate the performance of a substrate integrated waveguide (SIW) leaky wave antenna with transverse slots. The antenna operates like a transverse slotted rectangular waveguide, but is designed in SIW for reduced cost, size, and for easier integration with planar circuits. Results for S-parameter performance, antenna gain, and efficiency are computed.

  4. Simulating Performance Of A Low Cost, Chipless RFID System In XFdtd
    6/10/2019

    In this example, an RFID tag system is examined using XFdtd EM Simulation Software to validate its performance for use in situations where high volume usage requires very low-cost components. The RFID tag is constructed as a microstrip device with spiral resonators tuned to specific frequencies that represent separate bits of the tag code. The resonators are connected to two cross-polarized ultrawide band monopole disk antennas which receive and transmit the signal from the scanning system. The system is demonstrated with a design capable of encoding six bits that are formed by resonances 100 MHz apart between 2.0 and 2.5 GHz. The testing is done using two cross-polarized log period dipole array antennas which transmit and receive the signal from the RFID tag.

  5. A 5G, 60 GHz Antenna Array For mmWave Wireless Virtual Reality Headsets
    5/13/2019

    The array is composed of four elements which each have two patches and a parasitic element. The parasitic element aids in producing a wider beam in one dimension to give better coverage. The beams may be steered by varying the phase shift between elements to provide near hemispherical coverage.

  6. Design And Simulation Of 28 GHz Beamforming System And Antenna Array For 5G Network Base Stations
    4/18/2019

    The system consists of three parts: a Rotman lens beamformer with seven input ports and eight output ports, a series of stripline Wilkinson power dividers to split each Rotman output into eight equal signals, and an 8x8 patch antenna array. The design process consists of three separate stages. 

  7. Throughput Of A 5G New Radio FD-MIMO System In An Urban Area Using Custom Beamforming
    1/30/2019

    Wireless InSite's high-fidelity MIMO calculations predict system throughput and bit error rate.  This example demonstrates throughput analysis between three small-cell base stations employing FD-MIMO beamforming to User Equipment (UE) moving along a route, using 5G New Radio in a dense urban environment.

  8. Wireless Charging Applications Using XFdtd® EM Simulation Software
    1/4/2019

    Wireless power transfer is an emerging technology used in many applications, including consumer electronics, electric vehicles, and biomedical implants, and will undoubtedly see continued growth over the next decade and beyond.  This presentation demonstrates how XFdtd can be used to simulate and analyze wireless charging systems.

  9. White Paper: Modeling RF Propagation In Mines Using Wireless InSite
    12/12/2018

    This paper presents results from modeling RF propagation in a mine using Wireless InSite®. The Edgar Mine in Idaho Springs, CO provided the realistic scenario for the model. The path loss exponent was evaluated for a 5m section of the modeled mine by considering three different materials and three different standard deviation of surface roughness values for dry granite. When comparing this simulated data with data retrieved from the Edgar Mine it was determined that the Uniform Theory of Diffraction (UTD) ray tracing code, of Wireless InSite, can portray a communications system within a mine environment.

  10. White Paper: Complex 3D Modeling Of Sea To Land Scenario
    12/12/2018

    This paper presents results from sea to land propagation using Wireless InSite®. The effort explores the effects of various elements in the scene and how they impact the results. The various elements in the scene include the ships out at sea, the ships docked, the docks themselves, the buildings around the dock area, and the material properties of each.