1. P15342 Linear RF Measurement System Kate Gunderson Matt Chauncey Will Tourtillotte

2. Background Automated Slotted Coaxial Line utilized for Electromagnetic Fields Lab – Measures standing wave behavior of applied sinusoidal wave pattern from a network analyzer – Designed and constructed in 1997, showing signs of aging – Bulky and heavy

3. Requirements Redesign current fixture Update relevant technologies Match performance of current system Eliminate mechanical reliability issues Automated system measurements using MATLAB Durable Easily accessible components User’s manual Design for manufacturability

4. Proposed System Architecture

5. Breakdown of System Architecture PART 1: – System Base/Motor Mount & Motor Couplings PART 2: – Detailed Design Decomposition and Associated Circuitry Needed PART 3: – MATLAB Network Analyzer Data Acquisition Code PART 4: – Microcontroller Work

6. PART 1 System Base/Motor Mount & Motor Couplings

7. System Base Several different configurations proposed – Needed to proceed with a prototype that is built for manufacturability… – Material that would resist creep and would rigidly support hardware – Our recommended solutions? Slightly modify all slotted line assemblies into a single configuration. Perform maintenance on each slotted line – Realign rods, clean measurement head and rods, etc.

8. Motor and Slotted Line Couplings Four major options for couplers: – Flexible Drive Shaft – Helical Flexible Shaft Coupling (clamp-on) – Helical Flexible Shaft Coupling (set screws) – High Precision Bellows Flexible Shaft Coupling Ultimately concluded motor was not binding – Created a new motor mount to further reduce possibility of misalignment issues

9. Final Assembly Slotted Line Enclosure for Power Supply and Microcontroller Custom Motor Mount and Base *5 pounds lighter than previous design!

10. PART 2 Detailed Design Decomposition and Associated Circuitry

11. Subsystems Decomposition

12. Final Wiring Diagram

13. Final Circuit Schematic

14. PART 3 MATLAB Network Analyzer Data Acquisition Code and GUI

15. MATLAB GUI Code Flowchart (Please see next slide…)

17. Old LabVIEW GUI vs. Final MATLAB GUI

18. PART 4 Microcontroller Work

20. FINAL MATERIALS BOM, Engineering Requirements

21. Bill of Material (BOM)

22. Final Engineering Requirements