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Multi-beam Patc h Antenna Design

Multi-beam Patc h Antenna Design. Mustafa Konca Supervisor: Prof. Dr. Sener Uysal. Project Statement. Design of a multi-beam patch antenna To be used in a security system Software simulations Field tests Modifications Lab tests. The Security System. Surveillance. Multi-Directional

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Multi-beam Patc h Antenna Design

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  1. Multi-beam Patch Antenna Design Mustafa Konca Supervisor: Prof. Dr. SenerUysal

  2. Project Statement • Design of a multi-beam patch antenna • To be used in a security system • Software simulations • Field tests • Modifications • Lab tests

  3. The Security System Surveillance Multi-Directional Patch Antenna RF Link Solar Panel H.Q.

  4. The Security System • Autonomous Modules • Solar panels • Batteries • Intelligent software • Reliable Design • Flexibility • Fast Communication • Requires a well designed antenna

  5. The Module • Hexagonal pyramid design • Self Cleaning • Sturdy • Moving Sides

  6. Why Multi-Beam? • The Pyramid will be stationary • Minimum number of moving parts required • Antenna needs to transmit in different directions • Antenna should cover a whole hemisphere • This can be achieved with an antenna that has 5 beams in different directions at 45 degrees to each other • The antenna direction can be finely adjusted by moving the sides of the pyramid

  7. Why Patch? • Low profile • Resists wind and wear • Flexibility • Conformal shapes possible • Lightweight • Inexpensive • Ease of manufacture

  8. Why Multiband? • Reliability • Interference • Diversity • Environmental conditions • Speed

  9. Specification Objectives • Single design for all modules and locations • Dual band (ISM) • 2.4–2.5 GHz • 5.725–5.875 GHz • Five beams to cover a whole hemisphere • Selectable beams • Simultaneous if possible • Narrow beam-width for longer range • High Gain • Wide bandwidth for fast communication

  10. Design Approach • Option 1:A multilayer approach with many beams and a technique for suppressing the other • Option 2: Five antennas integrated as one antenna. • Both approaches are very challenging; such an antenna does not exist

  11. Design Steps • Use an existing element design • Design 5 separate antennas • Try to combine the antennas • Phased array • Design micro-strips to get necessary phase shift • Multilayer • Several antennas on top of each other • Switching to control the beam direction • Design a better element if time permits • Investigate the possibility of having more than one beam operational at the same time

  12. Simulations • First step will be simulating thesingle element which has high gain and directivity • Then the single element will be used in different configurations to get beams in 5 directions • Design Parameters: • Material • Distance to the ground plane • Shape • Feed type • Stability • Placement on the module

  13. Building the Antenna • Cost? • Hand made or fabricated? • Hand made design may not give accurate results • Multilayer design has to be fabricated • Need two for field tests • Connectors • Source and receiver

  14. Practical Tests and Tuning • Field tests • Confirm simulation results • Gain • Efficiency • Bandwidth etc. • Test under different conditions • Harsh weather • Landscape and obstacles • Different distances • Signal integrity • Interference from other devices • Tune and redesign if necessary and repeat all tests

  15. End of Presentation…. • Thank you for you time!

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