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Feasibility of directly integrating a single ended LNA onto the dense dipole array.
Thesis (MEng)--Stellenbosch University, 2023.
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| Format: | Thesis |
| Language: | en_ZA en_ZA |
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Stellenbosch : Stellenbosch University
2023
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| _version_ | 1867613820499787776 |
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| access_status_str | Open Access |
| author | Hattingh, Shane |
| author2 | Gilmore, Jacki |
| author_browse | Gilmore, Jacki Hattingh, Shane |
| author_facet | Gilmore, Jacki Hattingh, Shane |
| author_sort | Hattingh, Shane |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2023. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/127377 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA en_ZA |
| last_indexed | 2026-06-10T12:42:12.448Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/127377 Feasibility of directly integrating a single ended LNA onto the dense dipole array. Hattingh, Shane Gilmore, Jacki Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Antenna arrays Signal theory (Telecommunication) Antennas, Dipole Amplifiers (Electronics) Thesis (MEng)--Stellenbosch University, 2023. ENGLISH ABSTRACT: This thesis investigates the feasibility of directly integrating a single ended LNA onto the Dense Dipole Array (DDA). An investigation into a readily available discrete transistor suitable for the DDA is presented before the design and development of a low power (< 10mW) wideband LNA ranging from 450MHz to 1450 MHz is presented. The measured LNA produces a gain larger than 10 dB, an output reflection coefficient better than -13 dB and an average noise figure below 1.5dB across the perating bandwidth for a source impedance of 150Ω. An additional LNA is built and measured showing good agreement with the first LNA. An investigation into the coupling between two LNAs separated by the distance between elements of the DDA is conducted and it is concluded that this coupling is negligible. Optimisation of the DDA is attempted to match its active impedance at broadside to the LNA’s optimum noise impedance. A source pull simulation is performed on the simulated and measured LNAs to assess the feasibility of integrating the LNA with the DDA. It was concluded that it would not be feasible due to the poor input match presented. AFRIKAANS OPSOMMING: Hierdie tesis ondersoek die haalbaarheid om ’n enkel-einde LNA direk op die Dense Dipole Array (DDA) te integreer. ’n Ondersoek na ’n geredelik beskikbare diskrete transistor wat geskik is vir die DDA word aangebied voor die ontwerp en ontwikkeling van ’n lae drywing (< 10mW) wyeband LNA wat wissel van 450MHz tot 1450 MHz aangebied word. Die gemete LNA lewer ’n wins groter as 10 dB, ’n uitset refleksie ko¨effisi¨ent beter as -13 dB en ’n geraassyfer onder 1.5dB oor die bedryfsbandwydte vir ’n bronimpedansie van 150Ω. ’n Addisionele LNA word gebou en gemeet wat goeie ooreenstemming met die eerste LNA toon. ’n Ondersoek na die koppeling tussen twee LNA’s geskei deur die afstand tussen elemente van die DDA word gedoen en daar word tot die gevolgtrekking gekom dat hierdie koppeling weglaatbaar is. Optimalisering van die DDA word gepoog om sy aktiewe impedansie aan die bre¨ekant te pas by die LNA se optimale geraasimpedansie. ’n Brontreksimulasie word op die gesimuleerde en gemete LNA’s uitgevoer om die haalbaarheid van die integrasie van die LNA met die DDA te bepaal. Daar is tot die gevolgtrekking gekom dat dit nie haalbaar sou wees nie as gevolg van die swak insette-wedstryd wat aangebied is. Masters 2023-03-06T08:39:33Z 2023-05-18T07:19:00Z 2023-03-06T08:39:33Z 2023-05-18T07:19:00Z 2023-03 Thesis http://hdl.handle.net/10019.1/127377 en_ZA en_ZA Stellenbosch University xiv, 93 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Antenna arrays Signal theory (Telecommunication) Antennas, Dipole Amplifiers (Electronics) Hattingh, Shane Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title | Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title_full | Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title_fullStr | Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title_full_unstemmed | Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title_short | Feasibility of directly integrating a single ended LNA onto the dense dipole array. |
| title_sort | feasibility of directly integrating a single ended lna onto the dense dipole array |
| topic | Antenna arrays Signal theory (Telecommunication) Antennas, Dipole Amplifiers (Electronics) |
| url | http://hdl.handle.net/10019.1/127377 |
| work_keys_str_mv | AT hattinghshane feasibilityofdirectlyintegratingasingleendedlnaontothedensedipolearray |