Design of a 183 GHz subharmonic mixer using membrane integrated GaAs Schottky diode technology

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dc.contributor.authorAnderberg, Martin
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskapsv
dc.contributor.departmentChalmers University of Technology / Department of Microtechnology and Nanoscienceen
dc.date.accessioned2019-07-03T14:52:29Z
dc.date.available2019-07-03T14:52:29Z
dc.date.issued2018
dc.description.abstractFuture ground based and space-borne meteorological instruments require sensitive heterodyne terahertz receivers in order to study precipitation and atmospheric temperature. Meteorological research is dependent on accurate water vapour measurements, typically performed with receivers at 183.3 GHz. These receivers require low noise mixers in order to meet the sensitivity requirement. At frequencies below approximately 400 GHz conventional mixers use flip-chip soldered discrete Schottky diodes. The flip-chip technique is unreliable and typically prohibits post-mount visual inspection of the diode anode, which is an important qualification step for space applications. Moreover, mechanical stresses introduced during the mixer circuit assembly can degrade the reliability. To overcome these problems a beamlead GaAs Schottky diode 183 GHz subharmonic mixer, implemented with a microstrip circuit topology, has been designed. The beamlead diode enables full visual inspection and the robust mounting of the microstrip circuit minimises the mechanical stress. Simulations showed a minimum conversion loss of 6.2 dB including conductor losses at a local oscillator frequency of 91 GHz and a power level of 2.5 dBm. The RF bandwidth was 15 % with a centre frequency of 183 GHz and the LO bandwidth was 6 % with a centre frequency of 91 GHz. The mixer was integrated with an IF LNA and measurements showed a state-of-the-art minimum receiver and mixer DSB noise temperature of 550 K and 400 K respectively at 1.6 mW of LO power which was in good agreement with the simulations.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/255903
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectElektronik
dc.subjectElektrofysik
dc.subjectInnovation och entreprenörskap (nyttiggörande)
dc.subjectÖvrig elektroteknik, elektronik och fotonik
dc.subjectInformations- och kommunikationsteknik
dc.subjectElectronics
dc.subjectElectrophysics
dc.subjectInnovation & Entrepreneurship
dc.subjectOther electrical engineering, electronics and photonics
dc.subjectInformation & Communication Technology
dc.titleDesign of a 183 GHz subharmonic mixer using membrane integrated GaAs Schottky diode technology
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeWireless, photonics and space engineering (MPWPS), MSc
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