Experimental Characterization of a Circularly-Polarized 1-Bit Unit-Cell for Beam Steerable Transmitarrays at Ka-Band

Abstract : We propose here an experimental characterization procedure applied to a 1-bit reconfigurable transmitarray unit-cell working in circular polarization at Ka-band. The transmission phase of the unit-cell is controlled on the receiving side by switching two p-i-n diodes integrated on the radiating element. The circular polarization is generated on the transmitting side with a truncated corner patch antenna. A specific waveguide characterization setup and related procedure have been developed to extract the unit-cell S-matrix. The proposed setup includes non-standard waveguide sections, ad-hoc transitions and an Ortho-Mode Transducer (OMT). The experimental results demonstrate a good agreement with full-wave simulations with a discrepancy of less than 0.1 dB on the measured minimum insertion loss of 1.65 dB at 29 GHz. A 3-dB bandwidth larger than 12% has been measured.
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Submitted on : Thursday, January 24, 2019 - 11:59:30 AM
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Luca Di Palma, Antonio Clemente, Laurent Dussopt, Ronan Sauleau, Patrick Potier, et al.. Experimental Characterization of a Circularly-Polarized 1-Bit Unit-Cell for Beam Steerable Transmitarrays at Ka-Band. IEEE Transactions on Antennas and Propagation, Institute of Electrical and Electronics Engineers, 2019, 67 (2), pp.1300-1305. ⟨10.1109/TAP.2018.2880095⟩. ⟨hal-01987895⟩

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