Lossless Matching Layer for Silicon Lens Arrays At 500 GHz Using Laser Ablated Structures
Juan Bueno Lopez (TU Delft - Electronics)
Sjoerd Bosma (TU Delft - Tera-Hertz Sensing)
Tobias Bußkamp-Alda (Veld Laser Innovations B.V.)
Maria Alonso Del Pino (TU Delft - Tera-Hertz Sensing)
Nuria Llombart (TU Delft - Tera-Hertz Sensing)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
We present the design, fabrication and characterization of a broadband lossless matching layer for silicon lens arrays. The proposed matching layer is based on silicon frusta (truncated pyramids) on top of the lens array fabricated by means of laser ablation. This matching layer is advantageous over quarter-wavelength dielectric matching layers since it covers more than an octave of bandwidth. We compare the performance of this matching layer with the commonly-used parylene-C matching layer at the center of the targetted band (500 GHz) in a lens-antenna integrated system. We measure a 1.6 dB higher transmission of the proposed silicon frusta matching compared to the parylene-C matching layer.