90deg Phase Shifter [hlp]

Try here
http://www.microwaves101.com/encyclo...e_couplers.cfm

Failing that a quater wave length of cable

Peter

in simular problem, I search homepage, document, math-formula etc. to make polyphase network with RC-link (to make wideband 90 degree network as above) in any order...

I saw good site for 5 years ago with math behind polyphase network and from formula possible to make polyphase network order and value depend of frequency, bandwidth and how close to exact 90 degree you need over the bandwidth, but I can not find simular again...

Most of example of polyphase-filter on Internet is already calculated value for specific usage, not generic alghoritm...

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Is very intresting to make good 90 degree reference in case of phase angle measure of complex loads in different frequecys.