any one could give advices will be appreciated!!

Thanks a lot!

Thanks a lot!

any one could give advices will be appreciated!!

Thanks a lot!

Thanks a lot!

- Hello,

<<I'm assuming 11a means 802.11a. This is the standard for wireless LAN, and the signal

may have a high peak-to-average ratio. This implies that the amplifier must be linear or

unacceptably large distortion will occur. So the amplifier probably needs to be biased

for Class A operation (linear), unless some sort of linearization scheme is being used.

Then you can run load pull simulations on the amplifier to determine an optimal load impedance

to deliver a desired output power. Once you have an optimal load impedance, you may want to

run a source pull to find the optimal source impedance. This will improve the gain. You

may want to vary the source power and re-run the load pull.

If you have access to ADS,

it has quite a few more examples available for running load pull simulations and doing

PA design.>> - Thank you so much!!

Is there any people know how to cope with the parasitic of bond wire and lead?

For me, the parasitic of bond wire and lead are very troublesome!!

For example, my matching network at the output of PA need to use inductor about 0.7nH comparable with the parasitic of the bondwire!!!

thanks first for any help!! - Thank you so much for your help!

I still have one more question about the LoadPull.

After I run the load pull simulation, I got the optimum load impedance value for maximum output power. In the meanwhile, it shows me the input impecance at source when the load is optimized.

How to use the input impedance?

Actually, when I run the source pull simulation, it give me optimized source impedance, it is obviousely that the source impedance value can't make the input of PA matched.

Could you give me more advices? thank you so much!]

By the way, is there any detail material about using the loadpull in RFDE?

thanks again!???

Please see the http://eesof.tm.agilent.com/library.html

(currently-available journal articles on Agilent EEsof EDA products and applications.)

In there there are two white papers that you will find useful:

Richard L. Carlson, Motorola, Inc., Meld Load-Pull Tests With EDA Tools, Microwaves & RF, PDF, 416 kB, 12-page technical article, April 2003. Current Issue: Microwaves & RF.

.http://www.mwrf.com/Articles/Index.cfm?ArticleID=5448

I hope this helps,