TY - JOUR
T1 - Exploiting Multimode Antennas for MIMO and AoA Estimation in Size-Constrained IoT Devices
AU - Zandamela, Abel
AU - Chiumento, Alessandro
AU - Marchetti, Nicola
AU - Ammann, Max J.
AU - Narbudowicz, Adam
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - This work proposes compact multimode Multiple-Input-Multiple-Output (MIMO) antennas for Angle of Arrival (AoA) estimation in miniaturized Internet of Things (IoT) systems. The method excites different orthogonal radiating modes (TM21, TM02, and TM31 modes) for beamforming capabilities, and the AoA performance is investigated using the Multiple Signal Classification (MUSIC) algorithm, executed using numerical and experimental data. The technique is tested at 2.238 GHz, while using an antenna diameter < 7.5cm. Overall, an envelope correlation coefficient < 0.01 is realized between all antenna ports, and a 360° field of view AoA estimation is demonstrated across the entire azimuthal plane with mean absolute errors smaller than 0.098°. Furthermore, it is shown that the capability of separating multiple simultaneous impinging signals is comparable to that of state-of-the-art circular arrays with similar number of RF transceivers, while offering, respectively, up to 35% and 71% antenna diameter and height miniaturization.
AB - This work proposes compact multimode Multiple-Input-Multiple-Output (MIMO) antennas for Angle of Arrival (AoA) estimation in miniaturized Internet of Things (IoT) systems. The method excites different orthogonal radiating modes (TM21, TM02, and TM31 modes) for beamforming capabilities, and the AoA performance is investigated using the Multiple Signal Classification (MUSIC) algorithm, executed using numerical and experimental data. The technique is tested at 2.238 GHz, while using an antenna diameter < 7.5cm. Overall, an envelope correlation coefficient < 0.01 is realized between all antenna ports, and a 360° field of view AoA estimation is demonstrated across the entire azimuthal plane with mean absolute errors smaller than 0.098°. Furthermore, it is shown that the capability of separating multiple simultaneous impinging signals is comparable to that of state-of-the-art circular arrays with similar number of RF transceivers, while offering, respectively, up to 35% and 71% antenna diameter and height miniaturization.
KW - Angle of Arrival (AoA) estimation
KW - beamforming antennas
KW - compact Internet of Things (IoT) systems
KW - localization sensors
KW - Multiple Signal Classification (MUSIC) algorithm
KW - Multiple-Input-Multiple-Output (MIMO) antennas
KW - Sensor systems
UR - http://www.scopus.com/inward/record.url?scp=85149400029&partnerID=8YFLogxK
U2 - 10.1109/LSENS.2023.3244870
DO - 10.1109/LSENS.2023.3244870
M3 - Article
AN - SCOPUS:85149400029
SN - 2475-1472
VL - 7
JO - IEEE Sensors Letters
JF - IEEE Sensors Letters
IS - 3
M1 - 5500904
ER -