output noise level calculation of RX chain given only data sheet

[yefj]

Hello, I have an RX system shown below where my signal goes threw amplifier mixer and then filter and another amplifier .
Friss formula is not relevant im my case .
the boltsman formula Pnoise=-174dBm+10log(BW)
given the datasheet below How can I know the noise level in the end?
Thanks.

TGA2227 - Qorvo

www.qorvo.com

M1-0818NE-1_Double-Balanced Mixers

M1 double balanced mixers are hybrid assemblies that have been hand-tuned to feature low conversion loss and high isolations and a DC IF response. M1 mixers have generally been replaced with MM1 mixers with superior performance, repeatability, and availability. M1 mixers are still used in legacy...

markimicrowave.com

https://www.minicircuits.com/pdfs/ZRL-700+.pdf?srsltid=AfmBOooUiQy2hNcdwjar5kAFbhmyih9wNintJh3AEZKXgaVbp7fCCEcH

 

[dick_freebird]

You can't, until you specify noise power (in-band?) in.

Noise Figure is what you use, the contributed noise
and gain-on-noise. The end user gets to say what
their assembly imposes, and then they know the
resulting noise floor by simple addition.

If you feel a need to make the calculation you asked,
then assert your own noise "Pin" and work the lineup
on noise-figure basis to the output result.

 

[yefj]

Hello dick_freebird,my input signal goes into TGA2227 its BW is 20GHZ so it adds 10log10(2*10^9) which is 93dBm addition ,so thermal noise power after the TGA2227 is -174+93=-81
also its gain is 15dB also the NF is 2dB .
how do I know my (in band) power noise power tat you say that I miss?
Thanks.

 

[vfone]

If the BW is 20 GHz (20 000 000 000 Hz), the noise floor power after TGA2227 is: -174 + 10*LOG(2*10^10) + 2 + 15 = -53.9dBm

 

[yefj]

Hello Vfone ,Yes I understand after the TGA2227 -174 + 10*LOG(2*10^10) + 2 + 15 = -53.9dBm.

After the TGA2227 I have a mixer which has also 8GHz-18GHz BW and 6dB conversion loss also from the data sheet the say that its NF is 0.5dB(after 5 Mhz in IF port when we do downcoverting).
I have two questions:
1.So our input noise - 53.9dBm the mixer has new BW only 10GHz do we do -53.9+10log10(10^10)+NF+conversion loss=-53.9+100+0.5-6=+40.6dBm it a huge noise level.
Is my calcultion logic correct?

2.I heard In mixer we have noise components which come from the down converting from RF and LO areas.
Could you show how do I calculate them from the mixer data sheet?
Thanks.

" Mixer Noise Figure typically measures within +0.5 dB of conversion loss for IF frequencies greater than 5 MHz."

M1-0818NE-1_Double-Balanced Mixers

M1 double balanced mixers are hybrid assemblies that have been hand-tuned to feature low conversion loss and high isolations and a DC IF response. M1 mixers have generally been replaced with MM1 mixers with superior performance, repeatability, and availability. M1 mixers are still used in legacy...

markimicrowave.com