Ruritania
Member level 5
![Member level 5](/styles/images/ranks/dlevel5.gif)
Hi, all,
Let's consider a 50 ohm to 200 ohm impedance transformation SAW filter, and it has the insertion loss of 1dB. If it is inserted between a 50 ohm antenna and a 200 ohm LNA, will it help with the chain noise figure, or the noise figure of SAW+LNA will be better than LNA alone (refer to 50 ohm)?
Please let me know your calculation, if you're interested.
Thanks,
Ruri
Let's consider a 50 ohm to 200 ohm impedance transformation SAW filter, and it has the insertion loss of 1dB. If it is inserted between a 50 ohm antenna and a 200 ohm LNA, will it help with the chain noise figure, or the noise figure of SAW+LNA will be better than LNA alone (refer to 50 ohm)?
Please let me know your calculation, if you're interested.
Thanks,
Ruri