How to improve a LNA's 1dB Compression point?

Recently I am design a LNA of three stages with a SiGe BiCMOS process. I want a output 1dB compression point of 10dBm or higher for the third stage of the LNA. I have set the collect current Ic 12mA, yet I have gain a 1dB compression point of 8.5dBm, which is lower than the figure of merit.
Do someone have any advice on how to improve the 1dB compression point of this LNA?

http://www.semiconductors.philips.co...s/KV96157A.pdf

I don't know if this is feasible for you but, on the last stage you can send the
Input signal thru a Hybrid coupler (90°) and put 2 Output stages in parallel.
This will make the -1dB point ~ 3dB higher. Note one of the O/P stages will
be terminated to 50 Ohms and so will the unused Input of the Coupler!


And one other thing you might look at:

See if Stage 1 or Stage 2 is in compression, before the O/P Stage is!
Your -1dB point might be due to stage 1 or stage 2 and not the Output.

Cheers

thanks, I have checked that the first and second stage was not compressed. Using a coupler may be a little complex. I will try