Frequency spectrum measurement of RFID Tag

Hi there,

I wonder if anyone can help me with this one:

I plan to design my own antenna geometry for an RFID chip. In oder to learn about the frequency response, I think of scanning the setup using a spectrum analyser. This requires to build my own antenna probe if one does not wish to spend too much money. In principle, this should be straight forward, but I wonder whether anyone has done this before and can give me some hints on how to avoid any pitfalls which are there. To what specifics would I have to pay most attention?

Your help is greatly appreciated.