1. GROUP 6 WIDEBAND ARTIFICIAL PULSAR Alexander Botten Kerlin Canelli Advisor: Randy McCullough

2. BACKGROUND What is a Pulsar?  rotating neutron star that emits a beam of electromagnetic radiation  Think of a lighthouse

3. BACKGROUND  the world's largest fully steerable radio telescope.  Operates 0.1-116 GHz  Discovered three new millisecond pulsars Green Bank Telescope

4. PROBLEM STATEMENT  Over the years, analytical systems have been updated.  Limited time for testing  Solution: Artificial Pulsar

5. CURRENT ARTIFICIAL PULSAR  Does not accurately represent real pulsar  Bandwith is too small  No pulse dispersion  Standard signal generator

6. NEW ARTIFICIAL PULSAR  Larger Bandwith – (100MHz-1000MHz)  Command Line Interface  Adjustable pulse amplitude  User selectable pulse width and period  Polarization of pulses  Independent noise floor  Sub pulses and interpulses

7. CURRENT BLOCK DIAGRAM

8. NEW DESIGN

9. COMPONENTS  Noise source  Digital to Analog Converters  Band pass filter  Voltage Controlled Attenuator  Dispersive Non-Linear Transmission Line  Power Dividers

10. DESIGN AND IMPLEMENTATION  Design and simulate using Green Bank software  Finalized design, build  Operator’s Manual

11. CONCLUSION  Current ArtificIal pulsar is outdated  New Artificial Pulsar needed to test backends  One-off Scientific device

12. QUESTIONS?