Abstract
Conference Title: 2015 IEEE MTT-S International Microwave and RF Conference (IMaRC) Conference Start Date: 2015, Dec. 10 Conference End Date: 2015, Dec. 12 Conference Location: Hyderabad, India This paper presents a circular monopole antenna with two steps and an offset circular slot for passive ultra-wideband (UWB) radiofrequency identification (RFID) tag applications. The proposed tag will be used as a backscatterer for UWB localization applications. The scattering characteristics of the proposed UWB RFID tag such as the radar cross-section (RCS) and time domain waveforms are theoretically studied using commercial software program. Three different kinds of loads, i.e. 50-ohm matched, short-circuit and open-circuit loads are simulated. The proposed UWB monopole antenna has been used because of its good omnidirectional radiation characteristics. Results show that the backscattering from the UWB monopole antenna mode and structural mode can be easily distinguished in time-domain.