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This paper addresses the design of Vivaldi antennas with embedded reconfigurable stopband filters, to allow simultaneous multi-standard communication while rejecting interferers. Three designs targeting different band stop bandwidths are presented, all of them featuring wideband matching and large rejection-frequency tuning range. The bandstop filters are formed by microstrip resonators coupled to...
This paper is intended to detail the practical implementation of a receiver front-end, used in an impulse radio ultra-wideband testbed for low data rate communications and ranging. The receiver architecture consists of a filter bank followed by a downconversion stage that relaxes the analog-to-digital converters requirements in terms of input analog bandwidth. The filter bank is implemented by a four-way...
In this paper we present ULANDreg testbed that consists of two European mask compliant impulse radio ultra-wideband (IR-UWB) transceivers with low data rate and medium range for data communication and distance measurement. The transmitter uses time hopping spread spectrum codes to reduce the peak to average ratio in the power spectral density and the receiver is based on a filter bank. The hardware/software...
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