TY - JOUR
T1 - Beam Scanning of Silicon Lens Antennas Using Integrated Piezomotors at Submillimeter Wavelengths
AU - Alonso Del Pino, Maria
AU - Jung-Kubiak, Cecile
AU - Reck, Theodore
AU - Llombart , Nuria
AU - Chattopadhyay, Goutam
N1 - Accepted author manuscript
PY - 2019
Y1 - 2019
N2 - This paper presents a lens antenna that scans the beam using an integrated piezomotor at submillimeter-wave frequencies. The lens antenna is based on the concept presented by Llombart et al. in 2011, a leaky-wave waveguide feed in order to achieve wide angle scanning and seamless integration with the receiver. The lens is translated from the origin of the waveguide producing the scanning of the beam over a 50° field of view (FoV) (or about 6.25 beamwidths) with a maximum scanning loss of 1 dB. The lens movement is achieved with a piezoelectric motor that is integrated within the antenna and receiver block. A prototype was built and measured at 550 GHz achieving scanning beam angles close to 20° with only 0.6 dB of loss. The scanning of the 50° FoV, which corresponds to a lens displacement of approximately 2 mm, takes about 0.9 s achieving a scanning rate of 0.75 Hz of the FoV. The accuracy in continuous mode of the piezoactuator has been measured to be less than 28 μ in the worse of cases for displacements of 2 mm, which corresponds to a beam steering of 0.76°, much smaller than the antenna half-power beamwidth of 8°.
AB - This paper presents a lens antenna that scans the beam using an integrated piezomotor at submillimeter-wave frequencies. The lens antenna is based on the concept presented by Llombart et al. in 2011, a leaky-wave waveguide feed in order to achieve wide angle scanning and seamless integration with the receiver. The lens is translated from the origin of the waveguide producing the scanning of the beam over a 50° field of view (FoV) (or about 6.25 beamwidths) with a maximum scanning loss of 1 dB. The lens movement is achieved with a piezoelectric motor that is integrated within the antenna and receiver block. A prototype was built and measured at 550 GHz achieving scanning beam angles close to 20° with only 0.6 dB of loss. The scanning of the 50° FoV, which corresponds to a lens displacement of approximately 2 mm, takes about 0.9 s achieving a scanning rate of 0.75 Hz of the FoV. The accuracy in continuous mode of the piezoactuator has been measured to be less than 28 μ in the worse of cases for displacements of 2 mm, which corresponds to a beam steering of 0.76°, much smaller than the antenna half-power beamwidth of 8°.
KW - Beam scanning
KW - leaky-wave waveguide feed
KW - piezomotor
KW - silicon lens
KW - submillimeter wave
UR - http://www.scopus.com/inward/record.url?scp=85056715575&partnerID=8YFLogxK
U2 - 10.1109/TTHZ.2018.2881930
DO - 10.1109/TTHZ.2018.2881930
M3 - Article
AN - SCOPUS:85056715575
SN - 2156-342X
VL - 9
SP - 47
EP - 54
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
IS - 1
M1 - 8537949
ER -