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A Low-Profile and High-Gain Frequency Beam Steering Subterahertz Antenna Enabled by Silicon Micromachining
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0002-8894-7930
Institut National des Sciences Appliquées de Rennes: Rennes, Bretagne, FR.ORCID iD: 0000-0002-1779-1393
Université de Rennes 1: Rennes, Bretagne, FR.ORCID iD: 0000-0002-7866-9877
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(English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221Article in journal (Refereed) In press
Abstract [en]

A very low-profile sub-THz high-gain frequencybeam steering antenna, enabled by silicon micromachining, is reported for the first time in this paper. The operation bandwidth of the antenna spans from 220 GHz to 300 GHz providing a simulated field of view of 56°. The design is based on a dielectric filled parallel-plate waveguide (PPW) leaky-wave antenna fed by a pillbox. The pillbox, a two-level PPW structure, has an integrated parabolic reflector to generate a planar wave front. The device is enabled by two extreme aspect ratio, 16 mm x16 mm large perforated membranes, which are only 30 μm thick, that provide the coupling between the two PPWs and form the LWA. The micromachined low-loss PPW structure results in a measured average radiation efficiency of −1 dB and a maximum gain of 28.5 dBi with an input reflection coefficient below −10 dB. The overall frequency beam steering frontend is extremely compact (24mm x 24mm x 0.9 mm) and can be directly mounted on a standard WM-864 waveguide flange. The design and fabrication challenges of such high performance antenna in the sub-THz frequency range are described and the measurement results of two fabricated prototypes are reported and discussed.

Place, publisher, year, edition, pages
IEEE Press.
Keywords [en]
beam steering, leaky-wave antennas, silicon micromachining, terahertz radiation, quasi-optics, submillimeter-wave antennas, silicon on insulator
National Category
Telecommunications
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-261201DOI: 10.1109/TAP.2019.2943328OAI: oai:DiVA.org:kth-261201DiVA, id: diva2:1357130
Funder
Swedish Foundation for Strategic Research , SE13-007EU, Horizon 2020, 616846
Note

QC 20191007

Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2019-10-07Bibliographically approved

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Publisher's full texthttps://ieeexplore.ieee.org/document/8852837

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Gomez-Torrent, AdrianOberhammer, Joachim

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