If you need to characterize RFID tags or make reflection or stimulus/response measurements on antennas or transceiver modules, you might be able to make use of a low-cost basic spectrum analyzer ...

The N9322C, 7 GHz basic spectrum analyzer from Agilent, is designed for budget-constrained applications in R&D, manufacturing, maintenance, education labs, spectrum management ...

The SIGLENT SVA1015X spectrum analyzer is a very powerful and flexible tool for various measurements within the frequency range from 9 kHz to 1.5 GHz. Great basic specifications are the base for all ...

These units provide basic spectrum analyzer capability and are capable of running Agilent's 89600 vector signal analysis software.