LNA
Member level 3
Greeting!
I did search the forum there is tons of threads on PA topic but no answer for me. I hope someone could help me out.
I'm designing a OFDM 1W average PA in 500MHz~700MHz, 12.5dB backoff. The device I chose is Freescale MW6S010N, which is a 10W part. It is a hard time for me to match it to a good p1dB-- larger than 40dBm over band. However it doesn't seem the good P1dB bring me a good EVM-- the best EVM is only 32dB and system is asking 36dB. The only measure to improve it is to increase Idq to 400mA, which cause a very bad efficiency.
I don't have ADS to simulate the performance I have to spend lot of time working on the eval board. It's hard to balance many parameters (P1dB, Gain, IRL, efficiency, EVM, etc.) by experimental data. Can someone tell me how to improve P1dB/EVM without trading off efficiency too much?
I did search the forum there is tons of threads on PA topic but no answer for me. I hope someone could help me out.
I'm designing a OFDM 1W average PA in 500MHz~700MHz, 12.5dB backoff. The device I chose is Freescale MW6S010N, which is a 10W part. It is a hard time for me to match it to a good p1dB-- larger than 40dBm over band. However it doesn't seem the good P1dB bring me a good EVM-- the best EVM is only 32dB and system is asking 36dB. The only measure to improve it is to increase Idq to 400mA, which cause a very bad efficiency.
I don't have ADS to simulate the performance I have to spend lot of time working on the eval board. It's hard to balance many parameters (P1dB, Gain, IRL, efficiency, EVM, etc.) by experimental data. Can someone tell me how to improve P1dB/EVM without trading off efficiency too much?