Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Alexeff, I. Kang, W.L. Rader, M. Douglass, C. Kintner, D. Ogot, R. Norris, E. |
| Copyright Year | 1998 |
| Description | Author affiliation: Tennessee Univ., Knoxville, TN, USA (Alexeff, I.) |
| Abstract | Summary form only given, as follows. We have received a Phase 1 SBIR contract from the US Navy to develop a plasma stealth antenna. The concept is to use plasma discharge tubes as antenna elements. When the tubes are energized, they become conductors and can transmit and receive radio signals. When they are de-energized, they revert to nonconducting elements (in present tests, glass tubes), and do not reflect probing radio signals. The reflection problem is most acute for probing signals near the resonant frequency of the antenna, which produces a large reflection cross section. A second feature of the plasma antenna, is that it can be reconfigured during operation, by selectively energizing only some of the elements. It can therefore be "steered" electronically. This cannot be done with metal conductor antennas. A third feature of the plasma antenna, is that it can be turned off rapidly, reducing ringing on pulse transmission. Preliminary tests before receiving the SBIR successfully demonstrated both the operation of the antenna in transmission and reception, and the stealth features on a Navy test range in San Diego. The tubes used in that demonstration were modified neon sign discharge tubes filled with helium, neon, argon, and a neon-argon mixture. More detailed experiments are under way to explore such topics as optimizing the system with respect to antenna-feeder coupling, radiation-pattern peaking, and signal-to-noise ratio. |
| File Size | 96768 |
| File Format | |
| ISBN | 0780347927 |
| ISSN | 07309244 |
| DOI | 10.1109/PLASMA.1998.677860 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1998-06-01 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Plasmas Electron tubes Testing Receiving antennas Conductors Reflection Transmitting antennas Contracts Glass Resonant frequency |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|