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 Agilent N9322C basic spectrum analyzer operates from 9 kHz to 7 GHz. Features include a typical -152-dBm DANL for viewing low-level signals easily and clearly; ±0.1 ppm annual aging rate ...

Intended for cost-constrained applications in R&D, manufacturing, maintenance, education labs, and bench repair, Agilent’s N9322C basic spectrum analyzer covers a frequency range of 9 kHz to 7 GHz ...

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

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 ...