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nrf905 usage

hi all, i'm using nrf905 for wireless communication at range of about 30meter @433mhz. and have some question ,maybe your guys can help me. thank you.

  1. q1:upclk pin,donot use this pin,how to do?float it?
  2. q2:caps.can i use 0805 caps?
  3. q3:the on board antenna is 35x20 at 433mhz(datasheet),can i change to 20x35,maybe distance reduced.

thanks again.

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