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Usage of Ansoft/HFSS simulation tool in mobile device development Jari Jekkonen.

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Presentation on theme: "Usage of Ansoft/HFSS simulation tool in mobile device development Jari Jekkonen."— Presentation transcript:

1 Usage of Ansoft/HFSS simulation tool in mobile device development Jari Jekkonen

2 2 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Content Commercial, non-commercial and in-house 3D EM tools used in NOKIA Development process of mobile phone Simulation goals Early verification of EM properties of the device Design check / validation Timing for simulations Sample models Discussion

3 3 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Commercial, non-commercial and in-house 3D EM tools used in NOKIA Commercial Ansoft/HFSS (FEM) CST/MWS (FDTD/FIT) Flomerics/EMC/FLO (TLM) FEKO (MoM/FEM) IE3D (MoM) Non-commercial NEC (MoM) In-house Aplac – FDTD Boundary-element method by HUT

4 4 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Current status of the usage of the HFSS in NOKIA NOKIA wide EMC simulations network Re-use of simulation models (model library) Early verification by simulations started in some sites Part of the minimum block design process Iterative between mechanics, BB, RF and EMC NOKIA wide tool for EM simulations Import: SAT STEP IGES AutoCAD DXF SLD GEO STL Export SAT JPEG GIF BMP TIFF 3D modeller AutoCAD DXF VRML

5 5 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Development process of the mobile phone General steps of the mobile phone development M-steps are the maturity check points of the phone development (technology maturity) are prototype builds E-steps are the execution points of product program (management level) E-1E0E0.5E1E1.5E5E2E3E4 Pre-study / technology freeze Technology implementation production P1 P2 P3P4 P5 P6 M0M2M3M4M5M6M7M1M8M9M10M11M12 Sale Product maturity steps Project execution milestones Product builds P_

6 6 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Early verification of EM properties of the device Goals are to increase EM quality of the product to have less HW prototyping during the development project -> Shorten design time Reduce testing time to produce design rules for following projects

7 7 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Early verification of EM properties of the device IOP simulations Antenna simulations prototyping EM separation of antennas Noise coupling between BB parts and antennas E.g. Camera noise to GSM antenna Hinge simulations Conductive vs. non-conductive Surface material effects Optimum placement for sensitive components SIM MMC, SD, etc. Risk level estimation based on simulations Done already for couple of projects

8 8 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ

9 9 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ

10 10 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Isolation between GSM antenna and SIM lines

11 11 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Isolation between GSM antenna and display

12 12 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Design check / validation EMC measurements vs. simulations Model updates Re-use blocks to simulations library Shielding modifications E.g. SIM reader is designed by simulations for Gromit IOP measurements vs. simulations Antenna measurements vs. simulations Design updates

13 13 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Timing for simulations E-1E0E0.5E1E1.5E5E2E3E4 Pre-study / technology freeze Technology implementation production B1 B2 B3B4 B5 B6 M0M2M3M4M5M6M7M1M8M9M10M11M12 Pre-concept simulation Detection of potential EMC risks in whole concept and development of general simulation plan. HFSS Concept simulations Check for placement of main blocks (antenna, battery, SIM, MMC, camera, RF) HFSS First test Draft test of coupling between parts and antenna (model from other project is used) HFSS Calculation of the near-field radiation and detection of hot spots on PWB Second test of coupling between parts and antenna HFSS, SIWave Verification with available proto EMC checks based on calculation of 3-D analysis of the EM field inside the product HFSS, SIWave Sale

14 14 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Pre-concept model Not very detailed model First draft for antenna solution Structural resonances Best places for sensitive modules/components concept level model More details Some component/module locations are fixed Simulations for design help

15 15 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ concept level model Camera Grounding points More details Some component/module locations are fixed Simulations for design rules

16 16 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E-field 900MHz (GSM)

17 17 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E-field 1750MHz (GSM)

18 18 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E-field 1900MHz (GSM)

19 19 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E-field 1980MHz (WCDMA)

20 20 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ First tests Detailed models for EM-parts (connectors, memory card readers, etc.) Working antenna model All shields and other conductive parts fixed Firs EMC tests done and compared to simulations Corrections for design (using simulations)

21 21 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 900MHz (GSM)

22 22 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 900MHz (GSM)

23 23 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 1750MHz (GSM)

24 24 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 1750MHz (GSM)

25 25 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 1900MHz (GSM)

26 26 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 1900MHz (GSM)

27 27 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ E & H-field 1980MHz (WCDMA)

28 28 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM900 (ver. 1) Very critical area!

29 29 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM1800 (ver. 1)

30 30 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM1900 (ver. 1)

31 31 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM900 (ver. 2)

32 32 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM1800 (ver. 2)

33 33 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ GSM1900 (ver. 2)

34 34 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Conclusions Simulation tools are very useful from the very beginning of the design process can be used as a risk analysis tool of the EM environment of the product can be used to make prototyping with limitations may be used to produce design rules for daily engineering work

35 35 © 2005 Nokia cost_presentation.ppt / 2005-12-13 / JJ Questions ?

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