Vile 5 wrote:
"I would like to build a passive antenna for my cell phojne that has no
port. I know it goes into the 1100 MHZ range if that helps."

J.D. Kraus invented an antenna in 1938 that may help. He called it a
corner reflector.

The ARRL "Antenna Book" has tables and construction details, but you
might get by by making a cardboard corner papered on its inside with
aluminum foil. to make a reflector for your cell phone. You might make
it twice as wide as it needs to be so that you can make a 90-degree bend
in its middle. both reflecting panels (either side of the fold) may then
be one or two feet on a side.

You might wrap the reflector around the phone and your head while you
aim the interior angle in the direction of the repeater which serves you
best. You may get around 10 dB gain which is enough to make a difference
but not solve every problem. Don`t bother trying to patent the corner
reflector. Kraus and RCA did that back in 1939 or 1940, I believe.

Best regards, Richard Harrison, KB5WZI