Optimized holographic pattern for diffused infrared wireless communication
This thesis consists of 2 parts. Wireless communications offer a viable alternative to radio frequency (RF) communication for indoor use and other applications where high performance are needed. These systems use infrared technology (IR), which has significant advantages over RF. The most important...
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| Format: | Thesis |
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2008
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| Online Access: | http://hdl.handle.net/10356/4114 |
| _version_ | 1811678650145177600 |
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| author | Ramalingam Ramya |
| author2 | Chung, George Kit Chen |
| author_facet | Chung, George Kit Chen Ramalingam Ramya |
| author_sort | Ramalingam Ramya |
| collection | NTU |
| description | This thesis consists of 2 parts. Wireless communications offer a viable alternative to radio frequency (RF) communication for indoor use and other applications where high performance are needed. These systems use infrared technology (IR), which has significant advantages over RF. The most important advantages offered by infrared over radio are the availability of a virtually unlimited, unregulated spectrum, and the fact that infrared radiation does not pass through walls or other opaque barriers. Diffused infrared transmission is one of the preferred techniques used in indoor wireless communication. The project explores in the area of holographic diffuser for infrared wireless communication. The objective of the project is to reduce the zero order intensity or the central spot in holographic diffuser, and to get a better distribution of light. The hologram act as a beam splitter dividing the original laser beam from the transmitter into multiple beams. The hologram was fabricated using photolithography, followed by reactive ion etching on quartz substrate. |
| first_indexed | 2024-10-01T02:56:38Z |
| format | Thesis |
| id | ntu-10356/4114 |
| institution | Nanyang Technological University |
| last_indexed | 2024-10-01T02:56:38Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/41142023-07-04T15:03:10Z Optimized holographic pattern for diffused infrared wireless communication Ramalingam Ramya Chung, George Kit Chen School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems This thesis consists of 2 parts. Wireless communications offer a viable alternative to radio frequency (RF) communication for indoor use and other applications where high performance are needed. These systems use infrared technology (IR), which has significant advantages over RF. The most important advantages offered by infrared over radio are the availability of a virtually unlimited, unregulated spectrum, and the fact that infrared radiation does not pass through walls or other opaque barriers. Diffused infrared transmission is one of the preferred techniques used in indoor wireless communication. The project explores in the area of holographic diffuser for infrared wireless communication. The objective of the project is to reduce the zero order intensity or the central spot in holographic diffuser, and to get a better distribution of light. The hologram act as a beam splitter dividing the original laser beam from the transmitter into multiple beams. The hologram was fabricated using photolithography, followed by reactive ion etching on quartz substrate. Master of Science (Microelectronics) 2008-09-17T09:44:46Z 2008-09-17T09:44:46Z 2006 2006 Thesis http://hdl.handle.net/10356/4114 Nanyang Technological University application/pdf application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems Ramalingam Ramya Optimized holographic pattern for diffused infrared wireless communication |
| title | Optimized holographic pattern for diffused infrared wireless communication |
| title_full | Optimized holographic pattern for diffused infrared wireless communication |
| title_fullStr | Optimized holographic pattern for diffused infrared wireless communication |
| title_full_unstemmed | Optimized holographic pattern for diffused infrared wireless communication |
| title_short | Optimized holographic pattern for diffused infrared wireless communication |
| title_sort | optimized holographic pattern for diffused infrared wireless communication |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems |
| url | http://hdl.handle.net/10356/4114 |
| work_keys_str_mv | AT ramalingamramya optimizedholographicpatternfordiffusedinfraredwirelesscommunication |