DS4T4 Differential Dual Polarized Antenna Array Design

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DS4T4Differential Dual Polarized Antenna Array
Design

• Eloy de Lera Acedo
• Research Associate at Cavendish Laboratory,
  University of Cambridge

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Index

• Work at ASTRON FLOWPAD3
• (Feb May 2007)
• Work at FG-IGN/UC3M FIDA3
• (Jan 2006 Sep 2007)

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Index

• Work at ASTRON FLOWPAD3
• (Feb May 2007)
• Work at FG-IGN/UC3M FIDA3
• (Jan 2006 Sep 2007)

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FLOWPAD3 Ultra Wide Band Array

• Work at ASTRON
• FLOWPAD3 (Foilbased LOW cost PAcman Differential
  Dual polarized Demonstrator) is an active phased
  array tile of differentially fed tapered slot
  antenna elements which demonstrates the
  integration of the results of separated work
  packages of PACMAN (Phased Array Communication
  Antennas for Mass-Market Application Needs) and
  SKADS DS4T4.
• The demonstrator will not cover the full
  requirement specification of SKA antenna, but it
  will indicate what is achievable in future.
• Low Cost is the main target.
• Working band 0.3-1 GHz.

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FLOWPAD3 Antenna Model

• Diff. technology
• Bigger elements
• Low cost materials
• No Ground plane

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FLOWPAD3 Ultra Wide Band Array

• FLOWPAD3
• Differentially fed antennas (bridge in DLNA board
  )
• Reduce costs
• Number of LNAs per square meter.
• Down to 73.5.
• Low cost Materials, no ground plane.

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Future Work

• Connection between strokes of antennas
• Build and measure final tile

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Index

• Work at ASTRON FLOWPAD3
• (Feb May 2007)
• Work at FG-IGN/UC3M FIDA3
• (Jan 2006 Sep 2007)

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FIDA3FG-IGN Differential Active Antenna Array

• Centro Astronómico de Yebes (CAY)
• Fundación General de la Universidad de Alcalá
• Instituto Geográfico Nacional (FG-IGN)
• Departamento de Teoría de la Señal y
  Comunicaciones
• Universidad Carlos III de Madrid (TSC-UC3M)

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Work at FG-IGN/UC3MWide Band and Ultra Wide Band
Antennas
Use of Genetic Algorithms for structure
optimization
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Work at FG-IGN/UC3M Wide Band and Ultra Wide
Band Antennas
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Work at FG-IGN/UC3M Feeding Systems
After optimization transmission coefficient
above -0.45 dB from 0.1 to 1 GHz
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Work at FG-IGN/UC3M Arrays
Edge Effect
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FIDA3 Ultra Wide Band Array

• Array FIDA3 FG-IGN Differential Active Antenna
  Array
• FIDA3 is an active tile of differentially fed
  antennas to demonstrate the capabilities of
  differential technology, easiness of fabrication
  and reduced costs through the use of big
  elements.
• Working band 0.3-1 GHz.

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FIDA3 Ultra Wide Band Array

• FIDA3
• Differentially fed antennas Bunny Ears
• No extra substrate, no ground plane.
• Aluminum elements are being considered
• Big elements. Reduced number of LNAs/m2

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FIDA3 Discrete DA
Real Circuit (ATF 34143)
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FIDA3 Discrete DA
Balanced DA
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Future Work

• Optimize antenna performance
• Measure LNAs
• Feeding network
• Build and measure final tile

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Thanks for your attention