1 / 23

Meteor Receiver

Meteor Receiver. Andrew Thoni Charlie Hunter Greg Watkins Nick Nicholson Will Marshall. Project Overview. Design a receiver to detect objects in orbit passing through the NAVSPASUR. There is a community of hobbyist who want to detect space objects.

dunne
Download Presentation

Meteor Receiver

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Meteor Receiver Andrew Thoni Charlie Hunter Greg Watkins Nick Nicholson Will Marshall

  2. Project Overview • Design a receiver to detect objects in orbit passing through the NAVSPASUR. • There is a community of hobbyist who want to detect space objects. • Dr. Smith is extremely interested in owning one of these systems for a personal hobby. • Total cost estimate is $360

  3. Design Objectives

  4. Illustration of Design

  5. Simulated Antenna Impedance

  6. Simulated Antenna Gain

  7. Measured Antenna Gain

  8. Simulated Antenna 3D Gain at 217 MHz

  9. Measured Antenna Beam Width

  10. Antenna Problems • Antenna design is 75 Ω but the testing equipment is 50 Ω • Mechanical solution for attaching a connector • Optimal spacing between the two dipole sides • Directivity is too low.

  11. Antenna Solutions • BNC 75 Ω to 50 Ω transformer to connect to the network analyzer • Spade lugs and hose clamps to connect the cable to the driven element • Dipole spacing was not an issue • Redesign and add matching network to increase directivity

  12. Amplifier Design

  13. Amplifier Problems and Solution • Problems • Capacitors were too short for gaps in the board. • Soldering was not done well. • All the boards were shorted out. • Solution • Use commercial amplifiers.

  14. Commercial Amplifier

  15. Demodulator Circuit

  16. Demodulator Amplifier Testing

  17. Demodulation with 217.02 MHz Input

  18. PC Control and Capture Testing

  19. PC Control and Capture Problems • Problems • Two ports are XLR connectors • Unable to consistently write to DAC • Solutions • Proposed XLR to RCA adapter • DAC defaults to maximum gain

  20. Control and Capture Problems Continued • Problems • Defective buffer • Able to write to LO, but unable to generate desired frequency • Solutions • Bypass buffer • External frequency source

  21. PCB Problems • Coax input through-hole pads too small • DB-25 connector does not fit • Voltage regulator pins reversed • Buffer chip enables tied to disabled position • RCA outputs blocked by other components • Option for external oscillator not included

  22. Future Work • Perfect Low Noise Amplifier design. • Capture data with PC. • Complete software package to display position and velocity of space objects.

  23. Meteor Receiver Andrew Thoni Charlie Hunter Greg Watikins Nick Nicholson Will Marshall

More Related