Simulations EM à la HEIG-VD

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www.heig-vd.ch

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Simulations EM à la HEIG-VD

Présentation for ANSYS

Users Meeting

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Processus d’innovation

recherche appliquée recherche fondamentale développement industrialisation

grandes entreprises

c li e n ts

PME

in n o v a ti o n s prestations de service m a rc h é s m il ie u x d e l a r e c h e rc h e EPF Universités o rg a n is a ti o n s d e s o u ti e n

FNS /

et autres

CTI /

et autres

Promotion

économique

HES In s ti tu ti o n s recherche appliquée recherche fondamentale développement industrialisation

grandes entreprises

c li e n ts

PME

in n o v a ti o n s prestations de service m a rc h é s m il ie u x d e l a r e c h e rc h e EPF Universités EPF Universités o rg a n is a ti o n s d e s o u ti e n

FNS /

et autres

CTI /

et autres

Promotion

économique

HES HES In s ti tu ti o n s

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Recherche appliquée et développement

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Ra&D @ HEIG-VD

Volume financier

0.5 1.9 2.8 5.2 7.8 9.9 10.4 11.1 11.3 10.5 11.6 12.7 15.7 17.2 16.8 17.2 0 2 4 6 8 10 12 14 16 18 20 M il li o n s C H F 1996 1998 2000 2002 2004 2006 2008 2010

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Les Instituts

Les 12 instituts de Ra&D de la HEIG-VD sont

de véritables moteurs d’innovation

• Plus de 200 contrats annuels avec le tissus

économique

• 300 ingénieur-e-s et économistes impliqué-e-s

dans les activités de Ra&D

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Institute of Information and Communication

Technologies (IICT)

• 79 collaborateurs

• 54 projets

• Axes de recherche :

• Sécurité de l'information

• Internet mobile et ubiquitaire

• Communication électronique et collaboration

• Cloud computing

• Technologie sans fil

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Advanced Communications Group Advanced Communications Group

Advanced Communications Group

We Use «Waves»!

• RF communication devices

• Range from 1cm to 40000km (mostly 10s of m)

• LF, RFID, M2M, BT, 802.15.4, Satellite, Internet Of Things

• RF sensing

• “cardiac radar”, vital signs detection: MoViS (foundation)

• Space debris radar: CleanSpace (ESA/SSC)

• Goniometry (private mandate)

• Acoustic sensing

• In-door positioning (ultrasound time of flight) (HES funding)

• Acoustic communication

• Ultrasponder (EU FP7)

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Advanced Communications Group

«Waves» for medical treatment

• Ultrasound medical treatment

• Non-invasive treatment of prostate cancer

• 16 channel 3MHz 300W phasing ultrasound generator

• Client: EDAP-TMS (Lyon)

• First patients treated successfully 1.5 years after project start

• RF/microwave treatment

• Treatment by heating of tissues

• Beamforming/other focussing techniques

• Client and details under NDA

• Use of ANSYS HFSS + Human Body Model

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Advanced Communications Group Advanced Communications Group 10

MoViS Monitoring Vital Signs

• Non-contact monitoring of

vital signs through Doppler

Radar

• Heart rate

• Breathing rate

• Movements

• Sensor placed in

• Bed mattress (medical care, hospitals)

• Doctors premises (Wall sensor)

• Other security applications

• Applications

• Neonatal care

• Monitoring people with epilepsy

• Sports monitoring

•

On-going work

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MoViS Monitoring Vital Signs

• Challenges

• Not only measuring movements of external torso surface

• Coupling to internal organs

• Rejection of movements

• Signal processing

• Different signal architectures (quadrature?)

• Simulations

• Using Human Body Model

How to make to the HBM breathe, or its heart beat?

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Sports Ball positioning system

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• Principle: goniometry

• Several quasi Doppler Antennas

• Prototyped with software defined radio

• Open source GNUradio on Ubuntu PC • Ettus USRP SDR module

• Challenges:

• High-shock electronics in the ball (TRX)

• Small but efficient antenna in the ball (influence of dielectrics)

• World-wide 2.4GHz system

• Data interface

• Simulations

• HFSS: Antenna in the ball, ball on the ground

• Designer: Goniometry antenna circuit, impedance matching, crosstalk

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Sports Ball positioning system

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• Goniometry antenna switching circuit simulation with ANSYS Designer

• Easy import of ANF file from Altium

• Q: where to place the taps vs PCB line (in terms of λ₎

• Simulation of isolation using PIN diode models

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Sports Ball positioning system

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Hunting Safety system

• Warn hunter if (equipped)

hiker/mushroom seeker is in

dangerous zone

• ±30° angle of detection at 150m

• Multipath/reflections: trees and vegetation spread spectrum broadband

• Size constraints: hunter «scanner» + Hiker «Tag»

• Energy constraints antenna efficiency

• 4 antennas: 3 easy, one difficult

helix antenna on the gun

Challenge: small size, low weight dielectric antenna directivity!

UHF TRX Omnidirectional Controller 2.4GHz SS TX Directional +-30° UHF TRX Controller 2.4GHz RX (broadband) Module Chasseur „Scanner“ Omnidirectional 2.4GHz RX (broadband) Module Promeneur „Tag“

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Hunting Safety system

• Prototype 1: helical/dielectric antenna

• PVC rod: Length 140mm, dia 45mm

• Reflector: 60mm dia, 25mm high

• PVC ε_{=4.2, not very high}

• Intermediate result to validate principle

• Heavy, too big

Challenges:

Influence of gun on antenna

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Hunting Safety system

• Gun effects on antenna

• Degrades back to front ratio

• Side lobes especially on back

• Slight Rotational asymmetry

Challenges:

In reality the directivity and back-to-front are better

Influence of body, arm, hands Human body model?

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Hunting Safety system

• Prototype 2: Ceramic helix

• Higher permittivity dielectric

• T- Ceram E20, ε₌₂₀

• Rod length 64mm, reflector dia still 60mm

Challenges

Lower directivity than larger antenna (Chu’s criterion!!!)

It is really needed to consider hunter’s body, which can increase the front-to-back ratio

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DEFI10G: Gbit line and circuit

design

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• Goal: find a way to streamline the design of gigabit PCBs by

non-specialists in gigafast circuits

• Related to «Qcrypt» nano-tera project

• Measure a test board

• Compare with the SI model

• Challenges:

Import issues from Altium

Impossible to simulate the whole board at once (350x260mm) Necessary to slice the model PCB around one line

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DEFI10G: Gbit line and circuit

design

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• Comparison between simulation results and measurements

• Related to «Qcrypt» nano-tera project

• Measure a test board

• Compare with the SI model

• Challenges:

Import issues from Altium

Impossible to simulate the whole board at once (350x260mm) Necessary to slice the model PCB around one line

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Advanced Communications Group

Questions?

[email protected]

HEIG-VD/IICT

15 rue Galilée (Y-Parc)

1400 Yverdon

+41 24 557 27 54

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