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Field Fabrication of Advanced Antennas. George D. Sergiadis Aristotle University of Thessaloniki, Greece School of Engineering, Dept. of Electrical & Computer Engineering Telecommunications Laboratory. Communications, communications, communications , communications. - PowerPoint PPT Presentation
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The Fourth International Fab Lab Forumand Symposium on Digital Fabrication
Field Fabrication of Advanced Antennas
George D. Sergiadis
Aristotle University of Thessaloniki, Greece School of Engineering, Dept. of Electrical & Computer Engineering
Telecommunications Laboratory
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Communications, communications, communications, communications
• We need all sorts of communications, voice, data…
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Rural mesh model - main components
• Hardware:– Routers– Antennas, cables– Power supplies - Solar – Structural solutions
• Software:– Networking and dynamic multihop routing– QOS control– Management– Security and privacy
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Advanced Antennas
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Advanced Antennas at 2 to 5 GHz
1. High Gain2. High Manufacturing Accuracy3. Specialized Materials4. High cost
Price: $349.90
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Field produced Antennas
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Fab Lab Approach
• Very low material cost, 1 to 3 US $• Low Manufacturing Sensitivity• Locally Found Materials• Fab Lab easily reproducible, by unskilled
“Fablabers”, using the Fab Lab tools
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Collinear Antennas, 2.4 GHz, 3 to 9 dbi
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Planar Antennas, 8 dipoles, 2.4 GHz, 9 dbi
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Wide bandwidth
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
High gain
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Very high gain systems, 64 dipoles
• Planar design• Paralleling of
elementary dipoles• Glass dielectric• Phased feeding• But, Sensitive to Glass
thickness and er
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Challenging research issues
• Glass dielectric constant variability• Glass losses• Glass width variability• Dielectric homogeneity, higher frequencies• Manufacturing tolerant design• Low cost testing tools
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
New approach – Air dielectric – 9 to 13 dbi
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
First simulation results
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Dual band function, 2.4 and 5 GHz operation
George Sergiadis The Fourth International Fab Lab Forum and Symposium on Digital Fabrication – Chicago, August 22-23 2007
Related publications
• “A wideband printed dipole antenna with optimized tapered feeding balun for ISM and FWA bands” Microwave and Optical Technology Letters (Wiley), Vol. 43, No. 5, pp. 437-441, December 2004.
• “Wideband Printed Dipole Antenna Parasitically Enhanced with Over-an-Octave bandwidth. Dual-band Variant for WLAN Applications” Microwave and Optical Technology Letters (Wiley), Vol. 48, No.3, pp. 444-449, March 2006.
The Fourth International Fab Lab Forumand Symposium on Digital Fabrication
Field Fabrication of Advanced Antennas
George D. Sergiadis
Aristotle University of Thessaloniki, Greece School of Engineering, Dept. of Electrical & Computer Engineering
Telecommunications Laboratory
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