| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Muhonen, Juha", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Santos, Jorge", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Nagy, Rebekka", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-01-24T06:39:00Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-01-24T06:39:00Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2021", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/79481", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4ss\u00e4 ty\u00f6ss\u00e4 esitell\u00e4\u00e4n kahdeksankanavainen, vaihelukittuun silmukkaan perustuva mikroaaltol\u00e4hde, jonka taajuusalue on 2 GHz\u22128 GHz. Laitteen etu olemassa oleviin kaupallisiin\nsignaaligeneraattoreihin n\u00e4hden on kubittien kontrollointiin r\u00e4\u00e4t\u00e4l\u00f6ity taajuusalue sek\u00e4\nskaalautuvuus - laitteen kahdeksan kanavaa toimivat toisistaan riippumatta, ja useampia\nlaitteita voi pinota p\u00e4\u00e4llekk\u00e4in.\nLaitteen toteutuksessa kiinnitettiin erityist\u00e4 huomiota kohinan ehk\u00e4isyyn.\nValmiin\nlaitteen kohinatasoksi mitattiin noin \u2212100 dBc/Hz et\u00e4isyydell\u00e4 1 kHz kantoaallosta ja\n\u2212145 dBc/Hz et\u00e4isyydell\u00e4 10 MHz kantoaallosta. Eri kanavien v\u00e4linen ylikuuluminen oli\nenimmill\u00e4\u00e4n tasoa \u221260 dB. Kohinaa olisi kenties ollut mahdollista saada viel\u00e4 alemmas\nerottamalla piirilevyn signaalit paremmin RF-v\u00e4r\u00e4htelij\u00f6ist\u00e4 sek\u00e4 toisistaan, ja k\u00e4ytt\u00e4m\u00e4ll\u00e4\nenemm\u00e4n kondensaattoreita suodattamaan j\u00e4nnitteisi\u00e4 piirilevykerroksia. Kanavien v\u00e4list\u00e4\nylikuulumista olisi ollut mahdollista v\u00e4hent\u00e4\u00e4 parantamalla kanavien v\u00e4list\u00e4 eristyst\u00e4.\nT\u00e4m\u00e4n tekstin alkuosassa pohjustetaan mikroaaltol\u00e4hteen roolia kvanttilaskennassa kertaamalla vuokubittien toimintaperiaate sek\u00e4 se, miten kubitteja teoriassa kontrolloidaan\nmikroaaltojen avulla. Kohinan vaikutusta kubitteihin k\u00e4sitell\u00e4\u00e4n erillisess\u00e4 kappaleessa,\njonka tarkoituksena on perustella mikroaaltol\u00e4hteelle asetettua alhaisen kohinatason vaatimusta.\nTekstin j\u00e4lkipuoli k\u00e4sittelee vaihelukitun silmukan toimintaa sek\u00e4 mikroaaltol\u00e4hteen toteutusta komponentti- ja piirilevytasolta lopullisiin mittauksiin. Vertailun vuoksi on esitetty\nmy\u00f6s joidenkin vastaavien kaupallisten laitteiden kohinak\u00e4yri\u00e4. Lopuksi k\u00e4yd\u00e4\u00e4n lyhyesti\nl\u00e4pi mikroaaltol\u00e4hteelle suunnitellut IEC- ja CISPR-standardeihin perustuvat testit, joiden\nl\u00e4p\u00e4iseminen mahdollistaa EMC-sertifikaatin saamisen laitteelle.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "This work presents a prototype of an eight-channel PLL-based microwave source with\na frequency range from 2 GHz to 8 GHz. The advantage of the device compared to\ncommercial devices is the frequency range adjusted for the purpose of qubit control, and\ngood scalability - the eight chalnnels of the device can be operated independently, and\nmultiple devices can be stacked on top of each other.\nA remarkable feature is the phase coherence between any two channels, in the same device\nor different devices. The phase drift after warm-up remains below 1 \u00b0 in 12 hours.\nThe phase noise level of the device was measured to be \u2212100 dBc/Hz at 1 kHz offset and\n\u2212145 dBc/Hz at 10 MHz offset. The crosstalk between channels was \u221260 dB at maximum.\nThe noise performance could be further improved by enhancing the isolation of the PCB\nsignal traces from the RF oscillators and from each other, and by using more capacitors to\nfilter the power supplies. The channel cross talk could be lowered with more sophisticated\nshielding between the channels.\nThe first sections of this text offer a revision to the operation of flux qubits, in order to\nestablish an insight about the role of microwaves in the qubit control system. A separate\nsection is dedicated for the effects of noise on the qubits, which justifies the low-noise\nrequirements for the microwave source.\nThe latter part of the text focuses on phase locked loops and the implementation of the\nmicrowave generator from component-level to PCB and final measurements. Phase noise\ngraphs of some commercial devices are presented for comparison. In the end, an overlook\nto standard IEC/CISPR tests required for an EMC certificate is provided.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2022-01-24T06:39:00Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-01-24T06:39:00Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "91", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "mikroaaltol\u00e4hde", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kohina", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Scalable MW generator for quantum applications", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202201241257", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.collaborator", "value": "business", "language": "", "element": "contractresearch", "qualifier": "collaborator", "schema": "yvv"}, {"key": "yvv.contractresearch.funding", "value": "bruttopalkka 2600 e/kk puolen vuoden ajan", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "yvv.contractresearch.initiative", "value": "student", "language": "", "element": "contractresearch", "qualifier": "initiative", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4021", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "elektroniikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mittaus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "oskillaattorit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kvanttitietokoneet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mikroaallot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "laitteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kvanttifysiikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kvanttilaskenta", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "melu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "electronics", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "measurement", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "oscillators", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "quantum computers", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "microwaves", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "devices", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "quantum physics", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "quantum computing", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "noise", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
|