Abstract
This paper presents a novel scheme for development of an active Ultra-Wide Band (UWB) antenna. A single pulse of 133 ps and amplitude 530 mV peak to peak was obtained using High Electron Mobility Transistor (HEMT) as a generation circuit. This generation circuit was next integrated with a newly proposed UWB planar microstrip antenna. Transmission and reception characteristics of the UWB antenna were measured using a high speed oscilloscope. The short pulse generation circuit and the UWB antenna were fabricated using standard photolithography technique on Neltec soft substrate having e r = 2.2 and thickness =0.254 mm. The design and optimization of the UWB planar microstrip antenna were carried out using CST simulation software and experimental verifications done using Automatic Network Analyzer. The short pulse generation circuit was simulated using Agilent ADS software. The proposed scheme of active UWB antenna shows good agreement between simulation and measured results.
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