Lossless Matching Layer for Silicon Lens Arrays At 500 GHz Using Laser Ablated Structures

Journal article (2022)

Authors

J. Bueno Lopez Electronics - EEMCS
S. Bosma Tera-Hertz Sensing - EEMCS
Tobias Bußkamp-Alda Veld Laser Innovations B.V.
M. Alonso Del Pino Tera-Hertz Sensing - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
Research Group
Electronics (EEMCS) (TU Delft)
Copyright: © 2022 J. Bueno Lopez, S. Bosma, Tobias Bußkamp-Alda, M. Alonso Del Pino, Nuria Llombart
DOI
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https://doi.org/10.1109/TTHZ.2022.3202031
Anti-reflection coating Dielectric lens antennas Matching layer Submillimeter-wave
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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronics

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.