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How to phase shift the frequency to 90 degree at 418 Mhz?

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saif haider

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at 418mhz if some one want to phase shift the freq to 90 degree what shall be the best solution.
 

Re: phase shift

Hi

Depending on how much space you have available......either distributed or a lumped network.
You can also use transformers.

Regards
 

Re: phase shift

I would just use an extra quarter wavelength transmission line of the type that is consistant with your design.
 

Re: phase shift

tyassin said:
Hi

Depending on how much space you have available......either distributed or a lumped network.
You can also use transformers.

Regards
Click to expand...
plz if u help me in detail as how i can design this network or if u have any material on it plz do me some favour

Added after 2 minutes:

Azulykit said:
I would just use an extra quarter wavelength transmission line of the type that is consistant with your design.
Click to expand...
the problem is that i have to design a LC network and then path length of transmission line but at 418MHz i cant able to design it
 

Re: phase shift

Hi

Check out this book:


Here is explanied how to make lumped networks equivalent of distributed lines.

I do not know how complicated your network is, but this is a way to get started.

I also have a lot of articles on this subject, but if you have access to IEEE articels you can also find them yourself.

Regards
 

Re: phase shift

Check out LC polyphase filters. RC polyphase filters are used on chip for IQ generation, but LC have much less loss and smaller tolerance so better performance.
 

Re: phase shift

you can also take PLL into account if you need a precise phaseshift.
 

Re: phase shift

I think you mean synthesizing at double frequency and using /2 dividers which operate at rising and falling edge for IQ generation? Certainly the simplest solution.
 

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