Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Wide-band radio receiver for radio astronomy applications
Thesis (MEng) -- Stellenbosch University, 2022.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
| Published: |
Stellenbosch : Stellenbosch University
2022
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867614120675639296 |
|---|---|
| access_status_str | Open Access |
| author | Dhoda, Yusuf |
| author2 | De Villiers, Dirk |
| author_browse | De Villiers, Dirk Dhoda, Yusuf |
| author_facet | De Villiers, Dirk Dhoda, Yusuf |
| author_sort | Dhoda, Yusuf |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2022. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/125976 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:46:59.291Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/125976 Wide-band radio receiver for radio astronomy applications Dhoda, Yusuf De Villiers, Dirk Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Radio -- Receivers and reception Signal generators Radio astronomy Broadband amplifiers UCTD Thesis (MEng) -- Stellenbosch University, 2022. This thesis presents the design of a low cost front end wide-band radio receiver for use in radio astronomy applications. A signal between 500 - 1500 MHz is received and up converted via a mixer to an IF of 1945 MHz with a bandwidth of 60 MHz. This is then down converted via a demodulator to base-band centered at 30 MHz with a bandwidth of 60 MHz. The receiver outputs an I and Q channel. The receiver was made up mostly from of the shelf components except for the I and Q channel filter at base-band. The receiver design was simulated in Microwave Office AWR using the s-parameters of the components. Due to the high possibility of a high powered signal being received and saturating the receiver, the receiver was tested at Stellenbosch University in the RF lab with the signal source being a signal generator which was connected directly to the input of the receiver. The receiver was able to receive a signal within the designed range and convert it down to the correct intermediate frequency. The receiver however did not do this job as well as it was designed to do so, there were extra loss and reduced gain in the manufactured PCB. The source of these errors were identified and an attempt to correct these were made. Not all the corrections could be made as some of the major sources of these errors were from faulty components and due to time and design constraints new components could not be ordered to replace the faulty ones. After all the possible corrections were attempted the overall gain of the final manufactured PCB was approximately 20 dB less than it was designed to be. AFRIKAANS OPSOMMING: Hierdie tesis bied die ontwerp van ’n laekoste-front-end wyeband radio-ontvanger vir gebruik in radio-astronomietoepassings. ’n Sein tussen 500 - 1500 MHz word ontvang en opwaarts omgeskakel via ’n menger na ’n IF van 1945 MHz met ’n bandwydte van 60 MHz. Dit word dan afwaarts omgeskakel deur ’n demodulator na basisband gesentreer op 30 MHz met ’n bandwydte van 60 MHz. Die ontvanger voer ’n I- en Q-kanaal uit. Die ontvanger is hoofsaaklik uit die rakkomponente saamgestel, behalwe vir die I- en Qkanaalfilter by die basisband. Die ontvangerontwerp is in Microwave Office AWR gesimuleer deur die s-parameters van die komponente te gebruik. As gevolg van die groot moontlikheid dat ’n ho¨e-aangedrewe sein ontvang word en die ontvanger versadig is, is die ontvanger by die Universiteit Stellenbosch in die RF-laboratorium getoets met die seinbron ’n seingenerator wat direk aan die inset van die ontvanger gekoppel was. Die ontvanger kon ’n sein binne die ontwerpte reeks ontvang en dit na die korrekte tussenfrekwensie omskakel. Die ontvanger het egter nie hierdie werk so goed gedoen as wat dit ontwerp is om dit te doen nie, daar was ekstra verlies en verminderde wins in die vervaardigde PCB. Die bron van hierdie foute is ge¨ıdentifiseer en ’n poging om dit reg te stel is aangewend. Nie al die regstellings kon gemaak word nie aangesien sommige van die belangrikste bronne van hierdie foute van foutiewe komponente was en weens tyden ontwerpbeperkings nie nuwe komponente bestel kon word om die foutiewes te vervang nie. Nadat al die moontlike regstellings gepoog is, was die algehele wins van die finale vervaardigde PCB ongeveer 20 dB minder as wat dit ontwerp is om te wees. Masters 2022-11-16T06:54:48Z 2023-01-16T12:43:55Z 2022-11-16T06:54:48Z 2023-01-16T12:43:55Z 2022-12 Thesis http://hdl.handle.net/10019.1/125976 en_ZA Stellenbosch University xi, 115 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Radio -- Receivers and reception Signal generators Radio astronomy Broadband amplifiers UCTD Dhoda, Yusuf Wide-band radio receiver for radio astronomy applications |
| title | Wide-band radio receiver for radio astronomy applications |
| title_full | Wide-band radio receiver for radio astronomy applications |
| title_fullStr | Wide-band radio receiver for radio astronomy applications |
| title_full_unstemmed | Wide-band radio receiver for radio astronomy applications |
| title_short | Wide-band radio receiver for radio astronomy applications |
| title_sort | wide band radio receiver for radio astronomy applications |
| topic | Radio -- Receivers and reception Signal generators Radio astronomy Broadband amplifiers UCTD |
| url | http://hdl.handle.net/10019.1/125976 |
| work_keys_str_mv | AT dhodayusuf widebandradioreceiverforradioastronomyapplications |