Hello, John, and that link does not cover 0-90 degree (quadrature) hybrids
which I'm guessing is what Bindy is after. A commercially-available
broadband quadrature combiner/splitter is usually implemented using a 0-0
or 0-180 hybrid to which an all-pass network is added to achieve the
desired phase difference out the output ports of the hybrid. Getting
these devices to behave properly over a broad frequency range is somewhat
of a black art and vendors such as Mini-Circuits and Merrimac keep these
techniques to themselves. Sincerely, and 73s from N4GG0,
John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337
Hello both Johns. and one Bindy.
Here's how one person did it, and published in QEX November 1982.
"How to design wide-band RF Quadrature Network".
G.W. Horn, I4MK Bologna, Italy
It's not elementary, but he (and VE5FP/VK2BOX) made successful ones that
covered 3-30 MHz nicely. Horn gives the equations that must be satisfied to
accomplish the task.
If you have difficulty retrieving the article, the call book shows the call
sign still active. Might drop him a line.
W4ZCB