wilkinson divider design hf
I am designing a WIlkinson pwr divider for the frequency range of 30 MHZ-6 GHZ, on microstrip on Rogers 5880 Duroid. Problem is, for the frequency range of 1 GHz-6GHz, the design looks feasible, fitting well within a compact size, though multisections have to be used.
But for lower frequencies (30 MHZ), i simply cannot get the required isolation (20 dB) or proper Input return loss( 15 dB). Eeven more difficult is the size, since at low freq, the lengths of microstrip is simply unrealistic. And that becomes even more difficult, if i try multiple sections of quarter wavelengths.
I heard somewhere that, at lower frequencies we can design it by using ferrite rings which save size and give results. But i Googled any design techniques, and simply cannot find anything relevant.
If somebody has any idea on designing multiple-section Wilkinson using ferrite rings for lower frequencies, kindly help.
Thanks in advance!
Sibu
You can also use LC pi networks to simulate transmission lines. The problem is that the component tolerances are 10% for most parts.
Thanks Flautalent,
I thought the same. SO thinking of other avenues to design it.
I just had a memory. Many years ago I read a book about HF Single Side Band equipment. I think that one of the authors was from Collins Radio Co. It had several LC and transformer circuits for doing splitting and other transmission line functions. Perhaps some other board member can remember the title.
Hey Fellows,
got the name of a book dealing with it.
Classis Works In Rf Engineering: Combiners, Couplers, Transformers, And Magnetic Materials
Author(s): Walker, John L. B.; Myer, Daniel P.; Raab, Frederick H.; Trask, Chris
Artech House
This might help.
Have to search for it.