Low noise amplifier for Wifi ( LNA)

[zetaa]

Hello every body
please can you help me if it is possible
i m working on an application of LNA( Low Noise Amplifier) 2.5 GHz in order to use WiFi waves
i have to make a comparaison between differents LNA (2.5 GHz)
Can you please give me a comparaison of the differents types of LNA ( what makes the difference such us gain-frenqency-noise ... )

Thank you so much

 

[BigBoss]

Comparison is done by specs. of the LNAs..
Gain,Noise Figure,Reflections,Current Consumption,Bandwidth (if applicable),Nonlinearity ( IIP3,IIP5),Versatiliy,Feasibility,Cost etc..

 

[zetaa]

Thank you BigBoss for your answer, can you tell me please what do you mean by IIP3, IIP5, OP1(dBm) and OIP3(dBm)

 

[BigBoss]

Thank you BigBoss for your answer, can you tell me please what do you mean by IIP3, IIP5, OP1(dBm) and OIP3(dBm)

IIP3:Input Third Order Intercept Point
IIP5:Input Fifth Order Intercept Point
OP1:1dB Output Power Compression Point ( at where the Gp drops down by 1dB from small signal value )
OIP3: Output Third Order Intercept Point=IIP3+Gp or more conveniently IIP3=OIP3-Gp because IIP3 can not be measured, OIP3 can...

OIP3=Power of any Carrier@Output in OIP3 setup ( there are two equal carriers applied )+Delta /2

Delta=Power of any Carrier in OIP3 setup@Output-Power of TOI@Output ( Third Order Intermodulation Product=2*f1-f2 or 2*f2-f1)

See textbooks for more info.