Single antenna for 2 SDR dongles?

[abcd567]

@obj

You’ll be getting a minimum of 3dB loss.

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The 3 dB is only in case of an exceptionally good splitter. Most common ones have loss between 5 to 8 dB

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Signal combiner for two Pi's one antenna

Due to splitting of signal into two parts, each receiver gets 1/2 the power, i.e. “splitting loss” = 3 dB for an ideal lossless splitter. Practically there is an additional internal loss of about 2 to 5 dB depending on quality of the splitter. Hence: insertion loss = splittig loss + internal loss = 3 dB + 2 to 5 dB = 5 dB to 8 dB NOTE: Many manufacturer/seller specify "internal loss" as "insertion loss", omitting 3 dB "splitting loss" to give a false impression of a very low loss splitter . …