RF 13.56MHz Amplifier

hey!

I need a amplifier only for a test application. I want to change an inductor of 4.92uH and a antenna of 4.5mm diameters with one smaller, but to know the best orientation of the antenna i have to do some mesures with a scope. the signal is very low, somebody known the right amplifier for my problem?

Mini Circuits offer SMD amplifier chips that are wide band, very cheap and easily available.

One example: http://minicircuits.com/pdfs/ERA-8SM+.pdf

13.56 MHz is more like DC than RF related to today's electronic device parameters. But a 50 ohm wideband amplifier can serve the purpose, of course. You didn't however tell about intended level, bandwidth, etc.