Can we use SGA4586 as LNA?

[7rots51]

sga4586

SGA4586 from sirenza microdevices as LNA at 1575MHZ? in this freq the NF = 1.8

Is NF the only factor for selecting LNA? or other parameters exist for selection?

 

[madengr]

sga-4586

You can use this but if you are looking only for a narrow band (i.e. GPS) you can probably do better than NF=1.8 dB. You also have to consider P1dB or IP3. If your input signals may be strong, or have a strong jammer next to a weak signal, your LNA must be capable of amplifying without much distortion or intermod products, or else you'll need a pre-slection filter before the LNA which degrades your noise figure. You need to do a budget analysis of your down-conversion chain to find out how much dynamic range is needed out of each stage.

 

[7rots51]

lna 1575mhz ads

what part numbers you recommend for LNA in this freq range?

 

[madengr]

Avago has some GPS LNAs:



Also try:

https://www.cel.com