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KySat Design Review

This design review focuses on the development of a high-bandwidth S-Band radio solution for KySat. The solution includes an efficient receiver and transmitter with adjustable data rate and power output, along with Doppler shift compensation. The antenna requirements involve a gold-plated tape measure for conductivity and collapsibility. Testing includes vibration, thermal/vacuum, and communications testing to ensure component integrity, power output, and antenna patterns.

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KySat Design Review

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  1. KySat Design Review

  2. Primary Communications Power output Limited input power Transmit Receive Doppler shift compensation VHF/UHF Radio Requirements

  3. .25W or 1W Stensat Efficient Receiver and transmitter can be turned on separately Doppler shift Standard Ham frequency VHF/UHF Radio Solution

  4. Experimental High-Bandwidth Adjustable data rate Adjustable power output Doppler shift compensation S-Band Radio Requirements

  5. Microhard MHX-2400 Up to 115,200bps Can go as low as 2,400bps 1mW – 1W adjustable output Can compensate for 20khz Doppler shift S-Band Radio Solution

  6. High Radiation Efficiency Collapsible Few nulls in radiation pattern Antenna Requirements

  7. Gold plated tape measure Gold gives good conductivity Spring steel allows for collapsibility Monopole, only one null Antenna Solution

  8. Test if all components will survive launch Comply with CalPoly and DNEPR specifications Currently testing new solar panel PCB’s Vibration Testing

  9. Place all components under vacuum Thermal cycle Test electronic component integrity Test for outgassing Outgassing will cause: Solar cells inefficiencies Poor picture quality Thermal/Vacuum Testing

  10. Test S-Band Doppler shift compensation Test input power of all radios Test output power of all radios Test SWR at each antenna Check antenna patterns for nulls Communications Testing

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