A CMOS UWB pulse beamforming transmitter with Vivaldi array antenna for vital signals monitoring applications

A complete CMOS UWB Timed-Array Transmitter with a 3D vivaldi antenna array for electronic high-resolution beam spatial scanning

“…In contrast to phased-array system that only operates with carrier signal, the timed-array system operates with discrete pulses (carrier free) and may have a pattern of different spacing between the antennas [1,5,13,14]. e.g.…”

“…The PDC presented in this paper is based on investigations from [5], which waveform delay quasi-linear presented in a previous work [1], wh (delay vs. control word) was non array architecture. The circuit consists of four details shown in Fig.…”

“…3(a). Figure 3 shows the nonlinearity of the PDC from [1] linearity of the proposed PDC, for words (4, 8, 9, and 12), as viewed in figure. Delay range waveform of this work in comparison with [1]. (a) Delay range waveform with quasi linear response of the ref.…”

“…Moreover, UWB radars promise good performance for other of military or civil applications (e.g. as ground and wall penetrating, victim localizations in the rubble of a landslide or snow, in pediatric clinics for alerting and monitoring of the Sudden Infant Death Syndrome (SIDS), or biomedical imaging) [1][2][3][4][5][6]. This technique is formed for a transmitter (this work) and a receiver to perform telemetry and estimating the vital signs through detection of the motion of lung and heart walls.…”

“…The case of vital signs acquisition requires a high precision system that can capture the signals of each individual dynamically, as this type of analysis in motion can cause significant changes in waveform on the radiated UWB pulse [1,6,7]. With this objective, it is essential to use a radar system equipped with high-gain directional antennas to minimize reflections from the environment [7], justifying the choice of a beaforming system.…”