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The design of an FM-CW proximity radar
Thesis (MScEng) -- Stellenbosch University, 2004.
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| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613970552061952 |
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| access_status_str | Open Access |
| author | Kellerman, Robert A. |
| author2 | De Swardt, J. B. |
| author_browse | De Swardt, J. B. Kellerman, Robert A. |
| author_facet | De Swardt, J. B. Kellerman, Robert A. |
| author_sort | Kellerman, Robert A. |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MScEng) -- Stellenbosch University, 2004. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/50132 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:44:36.436Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/50132 The design of an FM-CW proximity radar Kellerman, Robert A. De Swardt, J. B. Stellenbosch University. Faculty of Engineering . Dept. of Electrical and Electronic Engineering. Radar Radar -- Antennas Continuous wave radar Dissertations -- Electronic engineering Thesis (MScEng) -- Stellenbosch University, 2004. ENGLISH ABSTRACT: The development of a small, cost effective short range FM-CW radar as well as the design and optimization of a double helix antenna is discussed. The FM-CW radar operates at Sband (2450 - 2550 MHz) and is limited at a maximum transmitted power of 5 dBm. The system is required to detect reflections from objects up to a 30 m range. This was made possible largely by the effective high gain antenna design and improved system isolation between the transmitted and received signals. The complete design process from fundamental requirements, through various simulations and system analysis to the final electronic circuit is discussed. The design was also built and measured in the laboratory and initial field measurements were taken. The following aspects were considered: Relation between the beat frequency and various FM-CW radar system parameters based on the theory, preliminary measurements and simulations. Radar component assessment and design. Design of a low cost Lange coupler that isolates the system's transmit and receive signals, which operates as a 90° hybrid and is used to feed a dual-fed circularly polarized patch antenna. A circularly polarized patch antenna and double helix antenna were designed, built and measured in an anechoic chamber. The antennas were implemented in the final radar system and compared on the basis of their contribution to the system's performance. Integrating the final radar system on a circular 60 mm diameter PCB with a double helix antenna mounted on top. The final radar system is able to measure range up to 40 m and meets all the design requirements. The signal processing of the measured beat frequency, however, can be taken further. AFRIKAANSE OPSOMMING: Die ontwikkeling van 'n klein, koste effektiewe kort-afstand FM-CW radar, sowel as die onwerp en optimalisering van 'n dubbele heliks-antenna word bespreek. Die FM-CW radar werk by S-band (2450 - 2550 MHz) en is beperk tot 'n maksimum uitsaaidrywing van 5 dBm. Van die stelsel word vereis om weerkaatsings van voorwerpe tot op 'n afstand van 30 m waar te neem. Dit is grootliks moontlik gemaak deur die hoë aanwins antenna-ontwerp en verbeterde isolasie tussen die stelsel se uitsaai- en ontvangseine. Die volledige ontwerpsproses van die fundamentele vereistes af tot die finale elektroniese stroombaan word bespreek. Verskeie simulasies andstelselanalises is gebruik om die finale FM-CW radar te realiseer. Die ontwerp is vervolgens in die laboratorium gebou en gemeet en aanvangsveldmetings is geneem. Die volgende aspekte is in nagevors: Verband tussen die puls-frekwensie en verskeie FM-CW radar stelselparameters gebaseer op die teorie, inleidende metings en simulasies. Ontleding van verskeie radarkomponente en -stelselontwerp. Ontwerp van 'n lae koste Lange-koppelaar met die doelom die stelsel se uitsaai- en ontvangseine te isoleer. Die Lange-koppelaar dien as 'n 90° hibriede wat gebruik word om 'n dubbele-voer sirkulêr gepolariseerde mikrostrookantenna aan te dryf. Verder is 'n sirkulêr gepolariseerde mikrostrook-antenna en 'n dubbele heliksantenna ontwerp en opgemeet in 'n anarqoïese kamer. Beide antennas is geïmplimenteer in die finale radarstelsel en is vergelyk op grond van hulle rol in die stelsel se funksionering. Die finale stelsel is geïntegreer en gebou op 'n ronde 60 mm deursnit PCB met 'n dubbele helix-antenna bo-op gemonteer. Die finale radarstelsel kan afstand tot op 40 meter bepaal en voldoen aan al die gestelde vereistes. Seinverwerking van die gemete puls-frekwensie kan nog verder ontwikkel word. 2012-08-27T11:33:15Z 2012-08-27T11:33:15Z 2004-04 Thesis http://hdl.handle.net/10019.1/50132 en_ZA Stellenbosch University 118 p. : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Radar Radar -- Antennas Continuous wave radar Dissertations -- Electronic engineering Kellerman, Robert A. The design of an FM-CW proximity radar |
| title | The design of an FM-CW proximity radar |
| title_full | The design of an FM-CW proximity radar |
| title_fullStr | The design of an FM-CW proximity radar |
| title_full_unstemmed | The design of an FM-CW proximity radar |
| title_short | The design of an FM-CW proximity radar |
| title_sort | design of an fm cw proximity radar |
| topic | Radar Radar -- Antennas Continuous wave radar Dissertations -- Electronic engineering |
| url | http://hdl.handle.net/10019.1/50132 |
| work_keys_str_mv | AT kellermanroberta thedesignofanfmcwproximityradar AT kellermanroberta designofanfmcwproximityradar |