Digitala Vetenskapliga Arkivet

Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
A Low-Profile and High-Gain Frequency Beam Steering Subterahertz Antenna Enabled by Silicon Micromachining
KTH, School of Electrical Engineering and Computer Science (EECS), Intelligent systems, 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
Show others and affiliations
2020 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 68, no 2, p. 672-682Article in journal (Refereed) Published
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, 2020. Vol. 68, no 2, p. 672-682
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.2019.2943328ISI: 000511198600006Scopus ID: 2-s2.0-85079266916OAI: oai:DiVA.org:kth-261201DiVA, id: diva2:1357130
Funder
Swedish Foundation for Strategic Research , SE13-007EU, Horizon 2020, 616846
Note

QC 20200224

Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2020-05-13Bibliographically approved
In thesis
1. Submillimeter-Wave Waveguide Frontends by Silicon-on-Insulator Micromachining
Open this publication in new window or tab >>Submillimeter-Wave Waveguide Frontends by Silicon-on-Insulator Micromachining
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents novel radiofrequency (RF) frontend components in the submillimeter-wave (sub-mmW) range implemented by silicon micromachining, or deep reactive ion etching (DRIE). DRIE is rapidly becoming a driving technology for the fabrication of waveguide components and systems when approaching the terahertz (THz) frequency range. The conventional method to manufacture microwave waveguide components, CNC-milling, shows important limitations when used at sub-mmW frequencies or above, due to the reduced size of the waveguides. At the same time, the classic electromagnetic designs, oriented to CNC-milling, are often not suitable for their fabrication using alternative technologies. The work in this thesis aims to develop fabrication-oriented electromagnetic structures, making use of the full flexibility of silicon on insulator (SOI) micromachining, and enabling the implementation of complex RF frontends at a low fabrication complexity.

The first part of the thesis reports on a turnstile orthomode transducer (OMT) in the WM-864 band (220 – 330 GHz). OMTs are key components in the feed-chain for radio astronomy, communications, or radiometry applications. However, their complex geometry has often limited their use when approaching the THz range, where polarization diversity is commonly avoided, or optical systems are preferred.

The second part reports on a high-gain and broadband waveguide corporatefed array antenna in the WM-570 band (330 – 500 GHz). High gain and broadband antennas are required for the future generation of THz wireless communications. Reflector and lens antennas can meet these specifications, but their fabrication for the THz range requires precision machining, resultingin a high cost, low yield, and small scale production. The use of silicon micromachined antenna arrays overcomes these issues while providing a more compact frontend.

In the third part of the thesis, a parallel plate waveguide (PPW) leaky wave antenna (LWA) fed by a quasi-optical beamforming network (BFN) in the WM-864 band is presented. The antenna frontend generates a pencil shaped beam scanning in elevation. The compact design, large bandwidth, and beam steering capabilities make this antenna a suitable frontend for THz radar applications.

The final part of this thesis reports on a novel waveguide single pole double throw (SPDT) switch in the WM-570 band. The switch is demonstrated in a two-port network configuration with two switching states (ON/LOAD), used for receiver calibration, or for avoiding backward waves in transmitter switching. A more complex 1×4 switching matrix is also designed for the implementation of an active radar antenna operating at 340 GHz.

Abstract [sv]

Denna avhandling presenterar nya radio frekvens (RF) frontend komponenter inom submillimeter våg (sub-mmW) bandet som kan implementeras med mikrofabrikationsteknik i kisel samt djup reaktiv jonetsning (DRIE). DRIE är en snabbt växande teknik som har blivit drivande för fabrikation av vågledarkomponenter och system som angränsar terrahertz (THz) frekvensbandet. Den konventionella tillverkningsmetoden för vågledarkomponenter, CNC-fräsning, påvisar stora begränsningar vid användning för sub-mmW bandet eller högre, på grund av de små dimentionerna av vågledarkomponenterna. Samtidigt är de klassiska elektomagnetiska konstruktionerna, som ofta är orienterade mot CNC-fräsning, inte lämpade för alternativa tillverkningsmetoder. Syftet med denna avhandling är att utveckla tillverknings orienterade strukturer genom att använda flexibiliteten av silicon on insulator (SOI) mikrofabrikationsteknik och att möjliggöra implementeringen av komplexa RF frontend med en låg tillverkningskomplexitet.

Den första delen av avhandlingen redogör för turnstile orthomode omvandlare (OMT) i WM-864 bandet (220 - 330 GHz). OMT är nyckelkomponenter i feedchain till radioastronomi, kommunikation och radiometritillämpningar. Likväl, har deras komplexa geometri ofta begränsat deras användning när THz bandet angränsas, där polariserings diversitet typiskt undviks, eller optiska systems är att föredra.

Den andra delen redogör för högvinst-, och bredbands,- parallellmatad arrayantenn i WM-570 vågledarteknologi (330 - 500 GHz). Högvinst- och bredbandsantenner behövs för den kommande generationens trådlösa THz kommunikation. Reflektor- och linsantenner kan uppfylla dessa specifikationer men deras tillverkning i THz bandet kräver mycket precis skärande bearbetning, vilket resulterar i höga kostnader, låg avkastning, och småskalig tillverkning. Genom användning av kisel mikrofabrikationstillverkade arrayantenner är det möjligt att övekomma sådana problem och samtidigt tillhandahålla en mer kompakt frontend.

I den tredje delen av denna avhandling presenteras en parallelplats-vågledar- (PPW) läckande-våg-antenn (LWA) matad av kvasi-optiska strålformande nätverk (BFN) i WM-864 bandet. Denna antenn-frontend genererar en pennformad strålskanning i elevations riktningen. Den kompakta utformningen, stora bandbredden, och strålstyrningsmöjligheterna gör denna antenn väl anpassad för THz radar tillämpningar.

Den sista delen i avhandlingen beskriver en ny vågledar-, single pole double throw (SPDT)-, omkopplare i WM-570 bandet. Omkopplaren påvisas i en tvåports- nätverkskonfiguration med två växlar (ON/LOAD) som används för mottagarkalibrering, eller för att undvika bakåtgående vågor i sändarväxlingen. En mer komplex 1 x 4 växlingsmatris utformas även för implementeringen av en aktiv antenn för en radar som opererar i 340 GHz.

Place, publisher, year, edition, pages
Stockholm: Kungliga Tekniska högskolan, 2020. p. 131
Series
TRITA-EECS-AVL ; 2020:28
Keywords
antenna, orthomode transducer, switch, waveguide, radiofrequency, beamforming network, submillimeter-wave, terahertz, silicon micromachining, deep reactive ion etching, silicon on insulator
National Category
Telecommunications
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-273332 (URN)978-91-7873-528-0 (ISBN)
Public defence
2020-06-12, Seminar Room, Floor 5, Malvinas väg 10, Stockholm, 16:00 (English)
Opponent
Supervisors
Note

QC 20200515

Available from: 2020-05-15 Created: 2020-05-13 Last updated: 2020-05-15Bibliographically approved

Open Access in DiVA

fulltext(19237 kB)108 downloads
File information
File name FULLTEXT01.pdfFile size 19237 kBChecksum SHA-512
cd322db40e827efcbd97d292a76135ca1ddb04778fc0511fc6f1fed619ee1900d635de7605b8e00095440aa9de775d3fac30ebd2056e8208a9872b27ddec9636
Type fulltextMimetype application/pdf

Other links

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

Search in DiVA

By author/editor
Gomez-Torrent, AdrianGarcía-Vigueras, MaríaLe Coq, LaurentEttorre, MauroSauleau, RonanOberhammer, Joachim
By organisation
Micro and Nanosystems
In the same journal
IEEE Transactions on Antennas and Propagation
Telecommunications

Search outside of DiVA

GoogleGoogle Scholar
Total: 108 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 342 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf