JAST-Vehicular-Antenna.pdf

8/10/2019 JAST-Vehicular-Antenna.pdf

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a V ia Sa t Com p a n y

EuCAP 2009 ARCTIC Workshoper n, arc

Advances in Vehicular Antenna

Communication Systems

Daniel Llorens*, Ferdinando Tiezzi*, Stefano Vaccaro*

(*) JAST SA, PSE-C, CH-1015 Lausanne, Switzerland, [email protected]


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a V i a Sa t Com p a n y Presentation OUTLINE

Review of requirements

Current solutions available and underdevelopment

L - an

Ku-band

Conclusions

Page 2 JAST Proprietary & Confidential


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a V i a Sa t Com p a n y

Market requests powerful Mobile Satellite

Broadcast large amount of data for information and entertainment

unavailable or inadequate

High capacity systems (Fwd & RC) to allow high number of users

Low communications costs

Dow

Link

k

Internet Radio Internet Tracking

UpLi

Video Data Safety Data

IN-VEHICLE SERCICES IN-FLIGHT Communications On-board multimedia



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a V i a Sa t Com p a n y A wide set of System requirements

Unidirectional broadcast/multicast download to a vehicle ADAS (Advanced Driver Assistance System) applications

S eed Limits

Traffic Management and Control (TMC)

Digital Map Updates

Location Based Services (LBS)

Unidirectional upload from a vehicle Map deviation

Digital Tachograph - static data

Pay per Use insurance

Vehicle Data

Road User Charging (RUC)

Bidirectional Fat (asymmetrical: broadband download to the

vehicle and a thin return channel) e-Call: RESCUE architecture

Dynamic Personal Navigation

Remote Vehicle Diagnostics - Data exchange

Fleet & Hazardous Goods Management - data direction to vehicle & Routing

Bidirectional thin interactive (symmetrical narrow band data flow) Hazardous Goods Management - Driver warning

Dynamic Personal Navigation On-Board navigation with real time info


-

Pay per Use insurance - fat client system


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a V i a Sa t Com p a n y Systems specifications

L-band Satellite digital radio broadcasting:

Freq: 1.467-1492 GHz

o : ua c rcu ar sw tc a e

L-band bi-directional low data rate (GEO - Thuraya or Inmarsat BGAN)

Freq: Rx 1.525-1.560 GHz; Tx 1.625-1.660 GHz

Pol: LHCP or RHCP

Positioning/Navigation

.

Pol: RHCP

L-band bi-directional low data rate (LEO - Iridium) Freq: Tx/Rx 1.610-1.626 GHz

Pol: RHCP

- - -

Freq: Rx 2.170-2.200 GHz; Tx 1.980-2.010 GHz Pol: dual circular switchable

u- an - rect ona g ata rate

Freq: Rx 10.70-12.75 GHz; Tx 14.0-14.5 GHz

Pol: dual linear switchable with polarization tracking



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Current solutions available and under development L/S-band: European Satellite Digital Radio Antennas

E- DR

Ku-band

Conclusions



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Dual CP antennas forf European-

Switchable Dual Circularly polarised antenna

European Satellite Digital Radio uses L-band spectrum andpolarisation diversity to offer up to 50 broadcasting channels

JAST offers the only antenna products for mobile reception ofDi ital Satellite Radio. Products are available for car and boat markets

WorldSpace Mobile WorldSpace Mobile

-


WSMAB-1


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Dual-CP E-SDR antenna patterns and

Antenna typical radiation patterns

1462 MHz 1472 MHz 1492 MHz

AfriStar North-West AfriStar South AfriStar North-East

AsiaStar North-East AsiaStar North-West



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a V i a Sa t Com p a n y Linear polarized Antenna for E-SDR

Radiatin element size15 mm

Antenna on field trials

Package size: Diameter = 52 mm, Height = 18 mm

The diameter can be reduced of 5 to 10 mm with some additional


design effort


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Lin-pol Thuraya Antenna - Radiation

Gain pattern measured on a 70cm round ground plane



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E-SDR Antennas - field trials at FIAT

Active antenna rotot e for the Euro ean Satellite Di ital

Radio (E-SDR) field trials realised in Turin, Italy, in

collaboration with Viatis, WorldSpace and Fiat.

Size: footprint 6x4.5 cm height 3 cm (height can be reducedto less than 2 cm)



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L - an : T uraya- P Ve icu ar Antenna

Ku-band

Conclusions



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a V i a Sa t Com p a n y Dual CP Thuraya Antenna


h G S di i


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Thuraya-GPS Antenna Radiation

00000000000000000000000000000

Horiziontal cutting plane measured with solar cells

Horiziontal cutting plane

Axial ratio at 3 dB

P1=LHCP30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 30-30 Thuraya = LHCP

60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60 60-60

Horiziontal cutting plane measured with solar cells

P2=RHCP

0 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 00 -10 -20 -30 -40 -30 -20 -10 0

30

0

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Horiziontal cutting plane

Axial ratio at 3 dB

GPS = RHCP

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Page 14 JAST Proprietary & Confidential0 -10 -20 -30 -40 -30 -20 -10 0


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L - an : Mu ti- ystem Antenna

Ku-band

Conclusions



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WGTI M ltis stem antenna


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WGTI Multisystem antenna



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Ku-band: Hybrid steering Array Antenna

Conclusions



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a V i a Sa t Com p a n y Ku-band Mobile broadcasting

Robust waveform and coding to reduce blockage effects

Lar e ca acit available at low-cost

Simple user terminals with small antennas

Possible use also outside Europe



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a V i a Sa t Com p a n y Ku-band solutions under development

Small hybrid steeringAntenna

Hybrid array

Mechanically steered in azimuth and electronicallyscanned in elevation and polarization.

Down

Link

Internet Radio Internet Tracking

Small Electronic steerinVideo Data Safety DataAntenna



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a V i a Sa t Com p a n y Fraunhofer Ku-mobile System Overview

New waveform with Error correction allowing:

Mobile reception in variable environment

Signal blockages management

Use of small low directivity antenna

Ku-mobile

modulator

Modulator and demodulator available APPLICATIONS

antennas

System tested with small hybrid array

Push to Store Applications

(Podcasts, video-clips, )


Information services

Support services to Navigation

Ku-Hybrid Array Steering Mechanical


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Ku-Hybrid Array Steering Mechanical

Rotary joint

ACU

Active radiating modules

ow-no se own-conver erwith WG-Coax transition


Ku-Hybrid Array - Detail of Antenna


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Ku Hybrid Array Detail of Antenna

Active Radiating Cards & Lead-frame

Support & Inclined Radiating Cards

Mounting Radiating Modules on Rx Card


b id l


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a V i a Sa t Com p a n y Ku-Hybrid Array Antenna results

Elevation scanning

dB

dB

dB

Th = 70 Th = 40 Th = 25

phi [deg] phi [deg] phi [deg]

dB

dB

dB

Theta [deg] Theta [deg] Theta [deg]


HiS t K b d T /R A t


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a V i a Sa t Com p a n y HiSat Ku-band Tx/Rx Antenna

The vehicular Low-profile hybrid array antenna is currentlyextended to a dual a erture Transmit/Receive

This solution will allow broadband communications to and from

professional/fleet vehicles

Patent Pending


P t ti OUTLINE


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Ku-band: Fully electronic steerable Array Antenna

Conclusions


N t li L C t K B d t i l


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a V i a Sa t Com p a n y Natalia - Low-Cost Ku-Band terminal

Small low-cost satellite terminal installed on

cars

Converged mobile TV + data casting services

(maps, weather, traffic, POI)

Low exploitation costs (/bit) thanks to largeavailable broadcasting capacity

Personal Installation Kits & OEM directly

integrated systems

Development funded by

Consortium:


Fully active phase array for SES-


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y p y -

Fully active phased array

< 17 mm thick Full scan capabilities

360 Azimuth

20to 60 in elevation Full polarization tracking capabilities

Over 360

Customized MMIC design Monolithic structure

Suitable for mass production in


Low cost approach


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a V i a Sa t Com p a n y Low cost approach

Major complexity factor in phased array are the control components for the polarizationtracking and 2-axis scanning

e uc ng e comp ex y o e con ro componen s re uces e cos o e an enna

The Natalia innovative architecture offers:

Reduction of the required number of phase shifters bits to achieve high precisionscanning thanks to the traXpol concept (Patent filing in progress),

Beam steerin and olarisation trackin are controlled b the same hase shifters

The original design of the antenna allows to reduce the number of phase shifter bits

(reduction of MMIC size) without decreasing the precision on beam and polarisation


Conclusions


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a V i a Sa t Com p a n y Conclusions

New on-vehicle telematics and entertainment services need large amountx u

Satellite communications systems are required to make several application

possible and cost effective (e.g. pan-European broadcasting)

We have resented some of the available solutions suitable for dif ferent

satellite system and combining communication and navigation services


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