WirelessApps Program

Monday November 6, 2023 - Room 3                     


14:00 - 14:20

3D EM Simulation Environment for the Development, Validation and Embedded Operation of Microwave Imaging Systems for Medical Applications

Branko Kolundzija, WIPL-D d.o.o.



Microwave imaging has attracted massive attention in the medical research field over the last decade due to its standout qualities of non-ionizing radiation and affordable components. An indispensable tool for the design, testing, and functioning of medical devices based on microwave imaging algorithms is a powerful 3D EM simulation environment.

In this work we propose such an environment starting from WIPL-D Pro, as an efficient and flexible general purpose 3D EM solver. The environment includes libraries of human phantoms and appropriate antennas, as well as tools and strategies for creation of library components and scenarios required by the medical application of interest.

An insight into these features will be given through-by-step description of development stages of a 3D Model of NEVA head with the 21-antenna system. Accuracy and usability of 3D EM simulation is shown using results for s parameters and near field for scenarios with and without stroke. Finally, it will be demonstrated that by post processing of these results using TSVD (Truncated Singular Value Decomposition) method the position and size of the stroke can be successfully detected.


14:20 - 14:40

The Latest Advances in Simulation for Automotive Radar Application

Hen Leibovich, Ansys Inc.



As autonomous driving technology advances, the need for vast amounts of high-quality data to train and validate radar-based perception algorithms becomes increasingly crucial. Traditional data collection methods often fall short due to real-world constraints. Therefore, the adoption of high-fidelity simulations emerges as a valuable strategy to meet this data requirement.

This presentation covers:

  • Cost and Time Efficiency: Evaluating the advantages of simulation-based data generation over traditional methods for faster development cycles.
  • Data Generation Techniques: Discussing advanced simulation algorithms for realistic radar data, including reflections, clutter, and interference.
  • Simulation Frameworks: Providing an overview of cutting-edge frameworks replicating real-world radar scenarios to generate comprehensive synthetic radar data.
  • Algorithm Training and Validation: Offering insights into the use of synthetic radar data to enhance perception algorithms for real-world conditions.
  • Challenges and Future Directions: Identifying obstacles and outlining future research areas to improve the realism and utility of synthetic radar data.


In summary, high-fidelity simulations are instrumental in supplying the requisite data for modern radar-based autonomous systems, bridging the data gap, and advancing safer and more reliable autonomous driving solutions.


14:40 - 15:00

Learning Session Part 1: Basics of Antenna Design for IoT and Sensor-Based Devices

Vladimir Vulfin, Electromagnetics Infinity LTD, Ansys Channel Partner



In Part 1 of our Learning Session, we will cover the fundamental aspects of antenna design for IoT and sensor-based devices, focusing on BLE / WiFi (2.5 GHz band) and Cellular LTE communication. During this session, participants will:


  • Understand how return loss affects antenna gain.
  • Learn what to look for when reading a datasheet for a commercial antenna for IoT devices.
  • Learn when and why to use a matching network for optimal antenna performance.
  • Review various antenna types suitable for different communications.
  • Examine a specific example illustrating when commercial chip antennas may exhibit low RF performance.


Explanations will be supplemented with simulated results using Ansys HFSS.


15:00 - 15:20

Learning Session Part 2: Antenna Integration in IoT and Sensor-Based Devices

Vladimir Vulfin, Electromagnetics Infinity LTD, Ansys Channel Partner



In Part 2 of our Learning Session, we'll explore aspects of antenna integration within IoT devices and the influence of various components on antenna performance. During this session, participants will:


  • Explore how the integration of antennas within IoT devices, combined with components such as batteries, cables and screens, can affect return loss and radiation pattern.
  • Discover techniques for optimizing antenna performance in IoT device.


Explanations will be supplemented with simulated results using Ansys HFSS.


15:20 - 15:40

Addressing Performance and Reliability Concerns with Thermal Analysis for RF Power Applications

Benny Haddad, Cadence



 Thermal analysis provides RF circuit designers with information about device operating temperatures that can degrade performance and threaten reliability. With the recent integration of the Cadence® Celsius™ Thermal Solver within the Cadence AWR Design Environment® platform, RF designers now have access to electrothermal analysis for monolithic microwave IC (MMIC)/RFIC, PCB, and module designs. This talk will highlight how the Celsius Thermal Solver uses design data such as layout geometries, material properties, and dissipated power simulation results from Microwave Office® software to provide designers with thermal heat map visualization and operating temperature information.


Coffee Break                                         


16:10 - 16:30

Novel methodology of high frequency circuits stability analysis

Matthew Ozalas and Sergey Baranchikov, Keysight Technologies, Israel



Across the entire wireless communications industry, standards are moving higher in frequency and systems are getting more complex. High-frequency circuit instability arises from a combination of gain and feedback. At the same time, advanced packaging technologies make the internals of the circuit less accessible than in the past, meaning things are harder to fix after the fact in the lab. Most high-frequency design engineers use only the classic "Rollet Stability Factor" to assess circuits, but this technique is based on assumptions that may not be valid for modern circuits. This presentation will help to understand how instabilities fundamentally arise in circuits and illustrate how to troubleshoot and resolve these issues up front in the design process using Keysight's latest simulation methodology for both small and large signal analysis in a non-invasive manner.


16:30 - 16:50

Best Practices and Modern Workflows for Finite Array Analysis in Ansys HFSS

Vladimir Litun, Ansys Inc.



This report provides an overview of advanced workflows for simulating finite-size periodic structures in Ansys HFSS. Best practices for modeling antenna arrays and metasurfaces of different types using the Finite Element Method are presented. Analysis methodology on an application-by-application basis is demonstrated. Several techniques for simulating an electrically large transmit array as well as an array antenna housed behind a radome are shown. Finally, explicit and domain decomposition simulation approaches are discussed and compared with such metrics as accuracy, time, and computational resource usage.


16:50 - 17:10

Introducing an Advanced "Scenario" Environment that Enables Smart Merging of Multiple 3D EM

Simulation Projects into one Coherent Superstructure

Branko Kolundzija, WIPL-D d.o.o.



Through cooperation with researchers in the field of medical equipment based on MWI algorithms, we realized just how demanding their process of system developing and testing is in terms of modeling 3D EM projects. Designing the antennas, antenna systems, observing performances of the antennas with/without the presence of phantoms, modifying phantoms to verify system functionality, all these steps are repetitive and require a lot of modeling time.

In this work we demonstrate an improved environment introduced to WIPL-D Pro, an efficient, general purpose 3D EM solver. The "Scenario" environment, designed with modeling simplicity in mind, shares almost all GUI mechanisms with the standard IWP project, but is enhanced with a simple scripting engine, enabling the assignment of unique global project settings over the entire range of the partial projects involved.

An insight into new features will be given through a realistic project containing head phantom and a 21-antenna system. It will be demonstrated how to simply expand single antenna into a 21-antenna system using integrated rotations and translations. Insertion and removal of antennas from the system, replacement of the antenna used in the system, as well as inclusion and exclusion of phantoms from the project will all be demonstrated.