Print Email Facebook Twitter Focal Plane Array of Shaped Quartz Lenses for Wide Field-of-view Sub-millimeter Imaging Systems Title Focal Plane Array of Shaped Quartz Lenses for Wide Field-of-view Sub-millimeter Imaging Systems Author Zhang, H. (TU Delft Tera-Hertz Sensing) Dabironezare, Shahab Oddin (TU Delft Tera-Hertz Sensing) Baselmans, J.J.A. (TU Delft Tera-Hertz Sensing; SRON Netherlands Institute for Space Research) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Date 2023 Abstract Large format focal plane arrays (FPAs) of dielectric lenses are promising candidates for wide field-of-view submillimeter imagers. In this work, we optimize the scanning gain of such imagers via shaping lens surfaces. We develop an optimization procedure using a field correlation technique between the fields generated by a reflector on the top of the lenses and those generated by the lens feeds. Based on this procedure, an FPA of quartz lens antennas combined with leaky-wave feeds is designed to efficiently illuminate the reflector, achieving a directivity of 50.5 dBi up to scanning 20.3°. The obtained scanning gain loss of 2.6 dB is much lower than that associated with the direct fields coming from the reflector (about 6 dB). The proposed FPA is validated by full-wave simulations with excellent agreement. We have fabricated and measured an example shaped quartz lens optimized for the scanning angle of 20.3° at 180 GHz. The comparison between the simulations and the measurements also shows excellent agreement. Subject Field correlationfocal plane arrays (FPAs)leaky-wave antennas (LWAs)lens antennaslens shapingquartz lensessub-millimeter imaging To reference this document use: http://resolver.tudelft.nl/uuid:8c5aedab-7017-4fa9-89a7-5842e43e1e9e DOI https://doi.org/10.1109/TAP.2023.3334391 Embargo date 2024-08-15 ISSN 0018-926X Source IEEE Transactions on Antennas and Propagation, 72 (2), 1263-1274 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 H. Zhang, Shahab Oddin Dabironezare, J.J.A. Baselmans, Nuria Llombart Files file embargo until 2024-08-15