HFSS 14 Update for SI and RF Applications Markus Kopp Product Manager, Electronics ANSYS, Inc.
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1 HFSS 14 Update for SI and RF Applications Markus Kopp Product Manager, Electronics ANSYS, Inc. 1 ANSYS, Inc. September 21,
2 Advanced Solvers: Finite Arrays with DDM 2 ANSYS, Inc. September 21,
3 Finite Arrays with Domain Decomposition Efficient solution for repeating geometries (array) with domain decomposition technique (DDM) 3 ANSYS, Inc. September 21,
4 Finite Arrays Solve large finite array designs Efficient setup and solution Define unit cell and array dimensions Efficient geometry creation and representation Efficient Domain Decomposition solution Leverages repeating nature of array geometries Only mesh unit cell Virtually repeat mesh throughout array Post-process full S-parameter Couplings included Edge effects included 3D field visualization Far field patterns for full array Memory efficient Enabled with the HFSS HPC product 4 ANSYS, Inc. September 21,
5 Finite Arrays by Domain Decomposition Each element in array treated as solution domain One compute engine can solve multiple element/domain in series Distributes element sub-domains to networked processors and memory 5 ANSYS, Inc. September 21,
6 Example: Skewed Waveguide Array 16X16 (256 elements and excitations) Skewed Rectangular Waveguide (WR90) Array 1.3M Matrix Size Using 8 cores 3 hrs. solution time 0.4GB Memory total Using 16 cores 2 hrs. solution time 0.8GB Memory total Additional Cores Faster solution time More memory. Unit cell shown with wireframe view of virtual array 6 ANSYS, Inc. September 21,
7 Skewed Waveguide Array Patterns from 8X8 Array Dashed is idealized infinite array analysis Solid from finite array analysis Two simulations use identical mesh Note edge effects due to finite array size 7 ANSYS, Inc. September 21,
8 HPC: Faster with additional cores Linux cluster 16X Dell PowerEdge R610 Dual six-core Xeon X5760, 8GB per core Same 8X8 array of probe feed patch antennas 3M+ Matrix size, 64 excitations Study performed using 101, 51,26, 11, 6 and 3 engines.* 101 simulation time = 17 min., 20X faster than direct solver *Three engines used as baseline speed factor speed factor 8 Number of cores ANSYS, Inc. September 21,
9 Hybrid Solving: Finite Element- Boundary Integral 9 ANSYS, Inc. September 21,
10 Finite Element-Boundary Integral Solving Larger Problems with Rigor Antenna Placement Study: UHF Antenna on Apache UH64 airframe Finite Elements with DDM Boundary Integral (3D Method of Moments) Hybrid Finite Element-Boundary Integral (FE-BI) 10 ANSYS, Inc. September 21,
11 Hybrid Solving: Finite Element- Boundary Integral Apache helicopter UHF antenna placement 900 MHz Solution volume 1,250 m 3 33,750 λ 3 Solution Specs 72 engines Matrix size = 47M 6 adaptive passes 300 GB RAM 5 hr 30 min Finite Elements with DDM 11 ANSYS, Inc. September 21,
12 Hybrid Solving: Finite Element- Boundary Integral Apache helicopter UHF antenna placement 900 MHz Solution surface 173 m λ 2 Solution Specs 12 core MP 680k unknowns 9 adaptive passes 83 GB RAM 5 hr 28 min Boundary Integral, 3D MoM with HFSS-IE 12 ANSYS, Inc. September 21,
13 Hybrid Solving: Finite Element- Boundary Integral Apache helicopter UHF antenna placement 900 MHz FEM solution volume 69 m λ 3 IE solution surface 236 m λ 2 Solution Specs 12 cores total using DDM with MP Matrix Size = 2.9M 6 adaptive passes 21 GB RAM 1 hr 3 min Hybrid Finite Element Boundary Integral Compared to 72 core FEM solution 14X less memory 5.5 times faster 13 ANSYS, Inc. September 21,
14 Hybrid Solving: IE Regions 14 ANSYS, Inc. September 21,
15 FEBI and Physically Separate Domains Reflector with multiple FE-BI domains Conducting reflector and feed horn each surrounded by air with FEBI applied to surface of air volumes Provides integral equation link between FEM domains But 3D MoM solution from integral equations could be applied directly to conducting surface only 1meter 10λ 1meter 20λ 1meter 30λ Frequency Memory Required Frequency Memory Required Frequency Memory Required 3 GHz 2GB 6 GHz 10GB 9GHz 30GB 15 ANSYS, Inc. September 21,
16 HFSS Hybrid Solving IE Regions Parallelized IE regions solved in parallel. Analogous to FEM domains Rigorous Multiple reflection Automated 16 ANSYS, Inc. September 21,
17 IE Dielectric Regions Solve large homogeneous blocks of dielectric with a boundary condition Replace enclosed arbitrary dielectrics Solve with multiple open or enclosed IE regions Conducting IE regions may be inside dielectric IE regions Antenna Air Ground Penetrating Radar Surface Soil Mine FEM Enclosed IE Conducting IE Different solution domains may be solved in parallel with DDM 17 ANSYS, Inc. September 21,
18 Physical Optics 18 ANSYS, Inc. September 21,
19 HFSS-IE PO Asymptotic solver for extremely large problems In HFSS-IE Solves electrically huge problems And provides first pass quick solution for IE Currents are approximated in illuminated regions Set to zero in shadow regions No ray tracing or multiple bounces Target applications: Large reflector antennas RCS of large objects such as a windmill Option in solution setup for HFSS-IE. Sourced by incident wave excitations Plane waves or linked HFSS designs as a source 19 ANSYS, Inc. September 21,
20 Solver on Demand 20 ANSYS, Inc. September 21,
21 Solver on Demand: An ECAD Interface for HFSS Problem Description: 1. Converting package and printed circuit board layout data to 3D mechanical CAD models creates a large amount of unnecessary overhead in the geometry database 2. A key capability needed for wide-spread use of HFSS as an extraction tool is to make it accessible to non experts Solution: 1. When HFSS is used for package and PCB extraction a 2D Electrical CAD layout editor is better suited for model creation and setup 2. The Designer Layout editor with Solver on Demand improves HFSS accessibility for non-expert engineers who need to use HFSS for package and PCB extraction It provides an EMI solution for 2 layer pkg and board design with HFSS and PlanarEM 3. The Designer Layout editor with Solver on Demand significantly reduces the engineering time required to set up package and pcb models for extraction with HFSS 4. Cadence design flows allows a user to solve with HFSS from within the Cadence environment using Cadence Extracta and an IPC link 21 ANSYS, Inc. September 21,
22 Designer RF with HFSS - Solver on Demand HFSS - Solver on Demand Intuitive PCB design entry for HFSS Chips, packages, channels, modules, Designer layouts simulated with HFSS Automated boundary and port setups Finite dielectrics and ground supported Wave and Lumped Gap Port Single ended and Differential Vertical and Horizontal Coaxial, CPW and Grounded CPW 22 ANSYS, Inc. September 21,
23 HFSS for ECAD Two Design Flows for Electrical Design Mechanical CAD Connectors, Waveguides HFSS Electric CAD (layout) PCBs, Packages, On-chip Passives HFSS - Solver on Demand 23 ANSYS, Inc. September 21,
24 HFSS for ECAD Highly automated for in layout design environment Primitives = traces, pads, bondwires, vias Net name definition Significantly reduce engineering time interacting with software Lightweight interface for geometrically complex structures Direct import of Cadence products using Cadence Extracta Allegro, APD, and SiP Direct HFSS solve from within the Cadence environment Virtuoso, Allegro, APD, and SiP 24 ANSYS, Inc. September 21,
25 Cadence SPB Integration Cadence integration enables engineers to create an HFSS model that is ready to simulate directly from the Cadence user interface. Advanced settings can be pre-defined in an XML-based control file to simplify setup for non-expert users. Other features: Critical net selection for extraction. Cut out and select critical geometry Manual or automatic extent definition. Port definition based on component pins or cutout edges. Definine wave ports at cutout extends Uses 3D information such as bondwire, ball and bump information from SiP to HFSS. Support for package, PCB and SiP flows. IPC interface enables real time feedback from HFSS to Cadence 25 ANSYS, Inc. September 21,
26 HFSS within Cadence SPB & Virtuoso Dynamic ECAD Flow Create and Solve models with HFSS from within Cadence SPB & Virtuoso HFSS Solution Progress 26 ANSYS, Inc. September 21,
27 HFSS ECAD Layout Editor HFSS Solver Technology is embedded in Designer as Solver on Demand Export 3D HFSS Model Solve in Designer using HFSS 27 ANSYS, Inc. September 21,
28 HFSS Solve for PKG merged to PCB Lumped ports on package bumps 28 ANSYS, Inc. September 21,
29 HFSS ECAD Layout Editor Adapt HFSS mesh at multiple frequencies: 29 ANSYS, Inc. September 21,
30 HFSS ECAD Layout Editor Surface roughness and etch factor can be defined in the stackup editor: 30 ANSYS, Inc. September 21,
31 Parameterized Padstacks Enables parametric investigation of via geometry, or optimization. Applied to global padstack definition. Therefore, project variables are used: 31 ANSYS, Inc. September 21,
32 Parameterized Differential Vias 32 ANSYS, Inc. September 21,
33 HFSS ECAD Layout Editor Parameterizable Etch Factor Automatic Causal Djordjevic Sarkar Dielectric Models Parameterizable Surface Roughness 33 ANSYS, Inc. September 21,
34 Show Nets in HFSS for MCAD Show Nets identifies 3D conducting paths between terminals 34 ANSYS, Inc. September 21,
35 Usability Enhancements 35 ANSYS, Inc. September 21,
36 General Enhancements Save Radiated field data only Reduced the amount of stored data Import list for Edit Sources Can include parametric variables ~10X Reduction Network Installation for clusters Improved reliability on Linux Non-graphical solves without product-links Solves are independent of Mainwin registry Installations on Windows Non-graphical solves without product-links New Registry Configurations Installation: Lowest precedence Defaults applicable to all users Machine: Defaults applicable to all users on a machine. User : Machine independent user specific default User and machine: Highest precedence Defaults specific to user + machine 36 ANSYS, Inc. September 21,
37 3D Modeler Enhancements View customization. 64-bit user interface Post process larger simulations Z-stretch Speed Improvements Faster geometry loading Improved solid modeler speed. Improvements for selecting complex objects. 37 ANSYS, Inc. September 21,
38 CAD Integration on WB Improvements CAD integration in ANSYS Workbench provides direct link to 3 rd party CAD tools Such as ProEngineer, Catia, SpaceClaim Added support for parametric analysis and distributed solving of CAD parameter 38 ANSYS, Inc. September 21,
39 Ansoft to ANSYS Geometry Transfer Geometry and material assignment transfer from Ansoft to ANSYS Consume geometry from multiple upstream CAD sources Source can be any of CAD, DesignModeler or Ansoft products Further geometry edits are possible in ANSYS Design Modeler Creates User Defined Model (UDM) for each geometry input. 39 ANSYS, Inc. September 21,
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