A parametric study of time-domain characteristics of possible UWB antenna architectures

Multiple-Input Multiple-Output Antennas for Ultra Wideband Communications

“…In this case, the antenna imposes more significant impacts on the input signal. As a result, a good time domain performance (i.e., minimum pulse distortion in the received waveform) is a primary concern of a suitable UWB antenna because the signal is the carrier of useful information [12]. Therefore, it is indispensable and important to study the antenna's characteristics in time domain.…”

GA design of a thin-wire bow-tie antenna for GPR applications

“…The nondispersive UWB performance of an antenna is characterized by its time-domain fidelity [15]- [17] or cross-correlation between the current of the antenna (output signal) and the voltage (input signal) at the feeding point [3]. We calculate the temporal variation of the current at the feeding point of a specific antenna using the moment-method-based frequency-domain numerical electromagnetic code (NEC) [18] via inverse fast Fourier transformation (FFT), and then the fidelity response is computed by using the expression [3] (1) where , and are the cross-and autocovariances of both the input voltage and output current signals, respectively.…”

Analysis the Performance of Transceiver Circuits for Pulse Based Ultra Wideband

“…A system with this architecture must have a highly stable oscillator and precise timing accuracy [4]. Other receiver performance improvements, such as a Rake receiver, which is necessary to capture multipath to create adequate signal energy, are difficult to implement using hardware [5], [6]. Multiple correlators are necessary to capture each multipath with a channel estimator running in parallel to detect the time when each correlator should be triggered and to determine channel polarity.…”