In article . com, "Bindy"
wrote:

Can anyone tell me how to build a broadband hybrid combiner for 2
shortwave loop receiving antennas?
I need 45,-45 degrees of phase on the 2 loops from 1 to 30 mhz? I will
be mounting the combiner right at the antenna after the preamps.

Bindy

Hello, and since the relative phase difference between the two loops is 90
degress could you not use a quadrature splitter/combiner? Mini-Circuits
and other vendors offer broadband hybrids. While DIY passive, narrow band
hybrids can be easily fashioned out of coax or lumped components, a
broadband device is more challenging.

BTW, you are asking for a device that can operate over a 30:1 frequency
ratio. I would relax that requiement if possible to 15:1 (2 to 30 MHz) or
less for a commercially-available hybrid. Also since you will be using
the combiner for receive only, RF power handling capability of the hybrid
should not be an issue. Sincerely,

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337