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oresat / oresat-c3-hardware

C3 (Command, Communication, and Control) our Command and Data Handling (C&DH) card.
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Replace UHF discrete transistor LNA with MMIC #54

Closed glennl closed 1 year ago

glennl commented 1 year ago

The transistor LNA has demonstrated problems when it's output is not properly matched. The proposed MMIC LNA provides very similar performance with far better stability. This subsystem is suspected to be the root cause of our UHF Rx failure in OreSat0.

Remove; Components inside the design block called "UHF Rx LNA, 21 dB" consisting of transistor Q9

Replace with; TQP3M9036 MMIC https://www.mouser.com/datasheet/2/412/TQP3M9036_Data_Sheet-1500677.pdf

cesarordaz commented 1 year ago

Replaced the LNA, still needs a little bit of design work