ELECTROMAGNETIC APPLICATIONS

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ELECTROMAGNETIC APPLICATIONS

• LABORATORY OF TELECOMMUNICATIONS
• George Sergiadis
• Associate Professor
• sergiadi_at_auth.gr

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Can we imagine our world without (Tele)communicati
ons ?
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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
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WiFi 802.11 networks
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Commercial Antennas
Price 349.90
High Gain Omni Wireless Antenna RadioLabs Low
Price169.95
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Fab Lab WiFi Antenna Specifications

• Low cost
• Fabrication faults tolerant
• Bandwidth min 2.4 to 2.5 GHz
• Input Impedance 50 Ohm
• VSWR lt2
• Omni directional or directional characteristics
• High, medium or low gain
• Mechanical rigidity
• Weather resistant

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Fab Lab WiFi Antenna Projects

• Planar antennas
• Parabolas
• Glass antennas

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Fab Lab Glass Antennas

• Glass substrate
• Self-adhesive cooper elements
• Longitudinal setup
• CAD construction

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Wide Bandwidth
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Higher gain Glass Antenna Arrays
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Array directivity
Directional 1200 - Gain 9 dbi
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Antenna Ingredients

1. Window Glass
2. Self adhesive cooper
3. CAD file
4. Flexible low-loss cable, or
5. Fab Lab transmission lines

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Very high gain systems(under development)
Directivity 600 to 350 - Gain 12 to 15 dbi
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Future Work (under publication)
Introduction of parasitic elements for even wider
bandwidth
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Future Work
Extremely wide bandwidth to include new bands
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Thank you for attention
Come and see !