In article , "John Smith"
wrote:

Bindy:

You may find the following link of interest:

http://www.w8ji.com/combiner_and_splitters.htm

Regards,
John Smith

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