Looking for Ultra Low Noise LNA for 4.4 5 GHz

[PaulHolland]

Hi, Who has a design or knows a ultra low noise LNA for 4.4 5 GHz. Noise figure < 1 dB. Gain some 15 - 20 dB.

Paul.

 

[safwatonline]

Hi, Who has a design or knows a ultra low noise LNA for 4.4 5 GHz. Noise figure < 1 dB. Gain some 15 - 20 dB.

Paul.

hello,
i am a newbie in RF, but doesn't the NF have a minumum value of 1 dB , i cannot understand how it will be less than 1 dB
regards

 

[khouly]

it will be discreete LNA , based on HEMT or HJFET simply it can give u the sub 1 dB NF

khouly

 

[PaulHolland]

Hi,

Yes it can be below 1 dB.... some components have 0.2 dB.... like www.cel.com

Paul.

 

[khouly]

also paul
check
www.nec.com
and www.avagotech.com
when u design ur amp , selsct a substrate with low loss to get the best noise figure and also when u design ur matching circuit match for minimum noise figure
check gonzalez book

khouly

 

[BigBoss]

Fujitsu has also low noise PHEMT discrete component that is ver suitable low noise designs..

Integrated components can not down to 1dB at that frequency.

 

[radiohead]

Also look at the Agilent pHEMT devices. Easy to use and very good performance.

 

[khouly]

agilent PHEMTs now belong to avagotech

www.avagotech.com

khouly

 

[drabos]

The minimal noise figure is 0 dB, not 1 dB.

I advise Avagotech (ex-Agilent) pHEMTs.
You can accomplish the 1 dB noise figure easily.

You need just an S parameter file for the design. And you can design the input and output matching network easily from a Smith chart, which you image the constan noise figure circles and the constant gain circles.