Terahertz Beam Splitting Lens for Efficient LO Coupling to a 7-pixel 1.9 THz Heterodyne Array
Paper i proceeding, 2024
Terahertz heterodyne arrays are promising spectroscopic instruments for submillimeter-wave astronomy applications. High-frequency multi-pixel heterodyning detection necessitates a local oscillator (LO) signal distributed and fed via free space by using a silicon lens array. However, limitations exist in the coupling of LO power emitted from a horn antenna. In this paper, we propose a free-form silicon lens for converting the input LO signal with a quasi-Gaussian profile into 7 beams with equal power for efficient coupling with the heterodyne array at 1.95 THz. The phase profile of this lens is calculated using a modified Gerchberg-Saxton (GS) algorithm. Analytical and full-wave simulations suggest that field coupling can be significantly improved, potentially reaching around 90%.
Författare
Mingxiang Stephen Li
University of Adelaide
Sven Van Berkel
Jet Propulsion Laboratory, California Institute of Technology
Jan Stake
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Goutam Chattopadhyay
Jet Propulsion Laboratory, California Institute of Technology
Withawat Withayachumnankul
University of Adelaide
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
21622027 (ISSN) 21622035 (eISSN)
9798350370324 (ISBN)
49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
Perth, Australia,
Perth, Australia,
Uppgradering av den nationella infrastrukturen för terahertzkarakterisering för att möjliggöra nästa generation trådlösa tillämpningar och instrument för fjärranalys
Vetenskapsrådet (VR) (2020-06187), 2021-01-01 -- 2024-12-31.
Ämneskategorier
Rymd- och flygteknik
Signalbehandling
Annan elektroteknik och elektronik
DOI
10.1109/IRMMW-THz60956.2024.10697622