Publications

  1. XFdtd Analysis Of Combined 860 MHz 4G And 28 GHz 5G Antenna Configurations In A Smartphone Design
    10/17/2018

    This example uses XFdtd® EM Simulation Software to analyze the performance and interaction of two antenna systems operating at 4G (860 MHz) and 5G (28 GHz) in close proximity in a smartphone design. The 4G antenna is intended to produce a broad pattern for wide coverage while the 5G array should produce narrow beams that can be steered by varying the phasing between elements. The 4G antenna is an inverted-L design and is located at the top of the phone. The 5G antenna array consists of four Yagi-Uda elements that are near the 4G antenna but offset by a conducting block.

  2. EM Simulation Of 28 GHz Series-Fed Patch Antenna Array For 5G
    8/17/2018

    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.

  3. Beamforming For An 8x8 Planar Phased Patch Antenna Array For 5G At 28 GHz
    8/17/2018

    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.

  4. Time Domain Electromagnetic/Circuit Co-Simulation
    7/5/2018

    This MicroApps presentation from IMS 2018 demonstrates the process of importing broadband circuit models into an electromagnetic simulation project, optimizing the overall design, and calculating important quantities such as S-parameters, radiation patterns, and system efficiency using a new electromagnetic/circuit co-simulation capability based on the finite-difference time-domain (FDTD) method.

  5. Simulating Throughput As A Device Design Metric
    7/5/2018

    Modern antennas utilize MIMO technology in order to meet consumer demands for high data rates.  As such, throughput is a required design metric when evaluating one antenna design versus another and simulating device performance in a realistic scenario leads to shorter design cycles. Traditional antenna design metrics primarily measure stand-alone antenna performance and don't fully provide the needed insight for current applications.  In order to achieve high data rates, design engineers need to combine their antenna design with a channel model and compute throughput.  This MicroApps presentation from IMS 2018 demonstrates the latest capabilities in throughput simulation.

  6. Simulation Of MIMO Handset Antenna Array Performance With Varying Hand Positions
    5/2/2018

    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.

  7. Configurable Array Antenna Simulation For Base Stations
    4/23/2018

    In this app note, a MIMO antenna is created and simulated to generate return loss, coupling, and gain patterns for several different configurations and operating modes of the device. The ability to form either omni-directional or focused beams is also demonstrated.

  8. Ten Cues You Need A 5G MIMO Channel Modeler
    4/18/2018

    How does Wireless InSite differ from planning tools? The most important differences emerge when users need to simulate 5G millimeter-wave and MIMO systems. This paper presents 10 cues that your organization may need a channel-modeling tool to supplement your 5G network planning efforts.

  9. Rotman Lens Design And Simulation In Software
    3/14/2018

    Since its invention in the early 1960s, the Rotman Lens has proven itself to be a useful beamformer for designers of electronically scanned arrays. Inherent in its design is a true time delay phase shift capability that is independent of frequency and removes the need for costly phase shifters to steer a beam over wide angles. This article uses the developed software to design and analyze a microstrip Rotman Lens for the Ku band.

  10. Optimizing An LTE Antenna’s Matching Network
    3/9/2018

    This application note describes the process of a simple antenna for LTE band operation added to the PC board of a smartphone in XFdtd being tuned for operation in multiple frequency bands. The component values in the matching network are chosen so that system efficiency is maximized.