GROUP 6WIDEBAND ARTIFICIAL PULSAR

Alexander Botten

Kerlin Canelli

Advisor: Randy McCullough

BACKGROUND

What is a Pulsar?

rotating neutron star that emits a beam of electromagnetic radiation

Think of a lighthouse

BACKGROUND

the world's largest fully steerable radio telescope.

Operates 0.1-116 GHz Discovered three new

millisecond pulsars

Green Bank Telescope

PROBLEM STATEMENT

Over the years, analytical systems have been updated.

Limited time for testing

Solution: Artificial Pulsar

CURRENT ARTIFICIAL PULSAR

Does not accurately represent real pulsar Bandwith is too small No pulse dispersion Standard signal generator

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

CURRENT BLOCK DIAGRAM

NEW DESIGN

COMPONENTS

Noise source Digital to Analog Converters Band pass filter Voltage Controlled Attenuator Dispersive Non-Linear

Transmission Line Power Dividers

DESIGN AND IMPLEMENTATION

Design and simulate using Green Bank software

Finalized design, build

Operator’s Manual

CONCLUSION

Current ArtificIal pulsar is outdated

New Artificial Pulsar needed to test backends

One-off Scientific device

QUESTIONS?