Ellison, BN, Valavanis, A orcid.org/0000-0001-5565-0463, Auriacombe, O et al. (8 more authors) (2018) 3.5-THz quantum-cascade laser emission from dual diagonal feedhorns. In: 12th European Conference on Antennas and Propagation (EuCAP 2018). 12th European Conference on Antennas and Propagation (EuCAP 2018), 09-13 Apr 2018, London, UK. IET ISBN 978-1-78561-816-1
Abstract
We present antenna-pattern measurements obtained from a double-metal supra-terahertz-frequency (supra-THz) quantum cascade laser (QCL) mounted within a mechanically micro-machined waveguide cavity and dual diagonal feedhorn assembly. With the QCL operating in continuous-wave mode at 3.5 THz, and at an ambient temperature of ~60 K, emission from both laser facets has been simultaneously directed to a suitable supra-THz detector mounted on a multi-axis linear scanner. Comparison of simulated and measured far-field antenna patterns shows an excellent degree of correlation between beamwidth (full-width-half-maximum) and sidelobe content. Furthermore, when compared with unmounted equivalents, very substantially enhanced QCL beam profiles are observed. Our novel device demonstrates the effectiveness of diagonal feedhorns intended for use in future spaceborne Earth-observing supra-THz heterodyne radiometers.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author produced version of a paper from the 12th European Conference on Antennas and Propagation (EuCAP 2018). Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | QCL; Supra-terahertz; antenna; heterodyne; mixer; local oscillator; waveguide; diagonal feedhorn |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number Centre for Earth Observation Instrumentation Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Dec 2018 10:14 |
Last Modified: | 12 May 2019 19:05 |
Status: | Published |
Publisher: | IET |
Identification Number: | 10.1049/cp.2018.0607 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:140002 |