broadband matching

hi see balanis book at chapter of broadband matching in microstrip.u can download it from www.mcu.cz

HI,
you may try the:
Binomial (maximally flat) Multisection Matching Transformer, there's also a version with equal - ripple response - called Chebyshev MMT.

You will find theory on:

Microwave engineering - David Pozar - Wiley

regards

Hi,

there is also a book by Pieter Abrie-Design of RF and Microwave Amplifiers and Oscillators, published by Artech House, it has a good portion devoted to broadband maching in general. Also, a book by Brian Minis-Designing MW Circuits by Exact Synthesis, Artech, is a good book to asses your problem

flyhigh

I would suggest doing matching on a smith chart with a constant Q circle. you can control the BW of your matching network by controling its Q. The old DOS base program from motorola has the constant Q circle.