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Impact of phase compensation method on transmitarray performance

Publié le 29 mars 2018
Impact of phase compensation method on transmitarray performance
Auteurs
Diaby F., Clemente A., Di Palma L., Dussopt L., Sauleau R.
Year2017-0235
Source-Title2017 11th European Conference on Antennas and Propagation, EUCAP 2017
Affiliations
CEA, LETI, MINATEC Campus, Grenoble, France, Universite Grenoble-Alpes, Grenoble, France, IETR (Institut d'Electronique et de Télécommunications de Rennes), UMR CNRS 6164, Université de Rennes 1, Bât. 1ID, Rennes Cedex, France
Abstract
The impact of the phase compensation method on transmitarray (TA) performance is studied here in terms of directivity, gain, aperture efficiency, and beam scanning capability. The analysis has been done by considering generic TAs based on ideal unit-cells and illuminated by an ideal focal source with a gain of 10-dBi and 100% of efficiency. The phase compensation on the array aperture can be implemented using two different methods, namely constant phase-shift and True Time Delay (TTD). The numerical results show that TTD compensation allows increasing the TA bandwidth and reducing beam squint as compared to constant phase-shift compensation. © 2017 Euraap.
Author-Keywords
beam squint, phase compensation, Transmitarray antennas, true time delay (TTD), wideband transmitarray antennas
Index-Keywords
Antennas, Efficiency, Aperture efficiency, Beam scanning capabilities, Beam squints, Numerical results, Phase compensation, Shift compensation, Transmit arrays, True time delay, Time delay
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