Brian Howie <brian@...>
In message <nnsadc+psvv3f@YahooGroups.com>, "email@example.com [ukmicrowaves]" <firstname.lastname@example.org> writes
MmI made a transition from water pipe to WG16 by forcing the end into a WG16 flange and gently tapping out a taper from rectangular to circular over a few wavelengths with some matching screws. I used it to interface to a circular scalar feed , so it was quite short. I actually found the end of the water pipe did just as good a job as the scalar feed.
I also had a friend who worked for the water board make me a ? feed out of water pipe. The problem was that the polarisation rotated in an uncontrolled manner. I was going to try to roll the pipe slightly to make an ellipitical guide , but ended up using the scalar feed with flexible waveguide.