Can anybody help me regarding the Radar cross section or back scattering signal limit like I am getting S21 plot for an RFID tag with a scale of below -30dB in references also they shown the same but no one justified it...may I know the reason limit of RCS.
Thanq somuch sir, I got it, I am doing research on RFID tags but my total tag result as shown in image, the level is -30dB i.e., S21 so how can I justify it. like can i cal it as an antenna isolation?.