Wide band matching network : from 0.85GHz to 6GHz

Hello, I need help with designing a very wide band matching network that goes from 0.85GHz to 6 GHz. In fact, it should be adapted in 4 bands: 0.9, 1.8, 2.4, 5.8GHz
We want to match to variables loads in frequency, the real and the imaginary part.

Which will be the best way:

- LC elements (I tried but I don't get good results)
- Lines with variable width(I tried but I don't get good results)
- Transformers
- Other ideas?

I would be grateful with any idea, or bibliography.
Please, I need some help

Thank you

See https://www.edaboard.com/viewtopic.php?t=382499

Thanks. Any other idea?

In my application, I need to tranfer the maximum power to the load. Source is a wide band antenna.

See http://www.designers-guide.org/Forum...1207009725/4#4

I applied the Fano limit this way [1]

I want a matching network to match from 0.9GHz to 5.8GHz, a complex impedance that varies with frequency. for fo=sqrt(0.9*5.8 ), the impedance seen is Z=0.001+j22

So I calculated Qo=fo/(fh-fl)=1.0653
Q of load=X/R=22/0.001=22000

reflex coef min= exp(-pi*(Q0/QL))=0.999 almost 1
Conclusion: it's not possible
Is this correct?

[1] The Yin-Yang of Matching: Part2. Randy Rhea

In case i didn't do any mistake, if it is not possible... might it be possible to match only in some frequencies. Any idea or technique to match multiple bands?

Thanks