august 2005symposium on digital fabrication tromso electromagnetic applications laboratory of...

AUGUST 2005 SYMPOSIUM ON DIGITAL FABRICATION TROMSO

ELECTROMAGNETIC APPLICATIONS

LABORATORY OF TELECOMMUNICATION

S

George SergiadisAssociate Professor

[email protected]

ARISTOTLE UNIVERSITY OF THESSALONIKI GREECE

SCHOOL OF ELECTRICAL ENGINEERING DEPARTMENT OF TELECOMMUNICATIONS


Can we imagine our world without

(Tele)communications ?


Is access true for everyone?

Country Fixed phones per 100

habitants

Mobile phones per 100

habitants

Uganda 0.28 1.43

Nigeria 0.43 0.28

South Africa

11.35 21.00

India 8 8


WiFi 802.11 networks


Commercial Antennas

Price: $349.90

High Gain Omni Wireless AntennaRadioLabs Low Price:

$169.95


Fab Lab WiFi Antenna Specifications

• Low cost

• Fabrication faults tolerant

• Bandwidth min 2.4 to 2.5 GHz

• Input Impedance 50 Ohm

• VSWR <2

• Omni directional or directional characteristics

• High, medium or low gain

• Mechanical rigidity

• Weather resistant


Fab Lab WiFi Antenna Projects

• Planar antennas

• Parabolas

• Glass antennas


Fab Lab Glass Antennas

• Glass substrate

• Self-adhesive cooper elements

• Longitudinal setup

• CAD construction


Wide Bandwidth


Higher gain = Glass Antenna Arrays


Array directivity

Directional 1200 - Gain 9 dbi


Antenna “Ingredients”

1. Window Glass2. Self adhesive cooper3. CAD file4. Flexible low-loss cable, or5. Fab Lab transmission lines


Very high gain systems(under development)

Directivity 600 to 350 - Gain 12 to 15 dbi


Future Work (under publication)

Introduction of parasitic elements for even wider bandwidth


Future Work

Extremely wide bandwidth to include new bands


Thank you for attention

Come and see !

august 2005symposium on digital fabrication tromso electromagnetic applications laboratory of...

Documents

digital fabrication

glass antenna arrayssymposium

wider bandwidthsymposium

new bandssymposium

input impedance