Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Shams, S.I. Kishk, A.A. |
| Copyright Year | 2014 |
| Description | Author affiliation: ECE Dept., Concordia Univ., Montreal, QC, Canada (Shams, S.I.; Kishk, A.A.) |
| Abstract | Summary form only given. The ridge gap waveguides is one of the highly recommended guided structures in high frequency applications. This is due to its ability to carry the signal with low losses. The signal pass through this structure in the form of Quasi TEM mode, which grantee less dispersion compared to other structures working in the same operating band with ridge gap waveguide, like SIW. One of the major drawbacks of the ridge gap waveguide is related to the used excitation technique. It is always difficult in fabrication and in many cases, it is responsible for limiting the possible bandwidth of the structure. One simple and straightforward idea is to connect the ridge gap waveguide to one of the standard 50Ω lines, such as Microstriop lines or Coplaner waveguides. This work is focused on the Microstrip line case. It is required that the ridge waveguide is directly connected with the 50Ω Microstrip line. The direct connection will have a certain level of mismatch and the reflection increases as the dielectric constant of the microstrip line substrate increases. As a first step of the transition design, a low relative permitivity substrate is chosen. This initially reduces the reflection occurs at the transition. The second step of the transition design is to insert two sections of matching between the microstrip line and the ridge gap waveguide with the help of lower dielectric constants substrates than those used in the microstrip line. The substrates with these lower dielectric constants can be achieved by using the same substrate and apply perforation. Controlling the perforation density will adjust the relative permitivity of the substrate at the required value to achieve matching. Using the previously described technique, the ridge gap waveguide can be attached directly to a 50Ω microstrip line. Connecting the microsrtip line to one of the standard coaxial connectors, like (SMA, 2.4mm, 3.5mm or 1.85mm), is a well-established connection. This provides a very easy procedure for ridge gap waveguide measurements. It is worth to mention that the fabrication process for such a transition is very simple as it is a two dimensions printed structure. To eliminate the radiation of this transition, an extension of the periodic cells is placed in the microstrip line side. Within the microstrip line part, the periodic cells will introduce some sort of packaging to get rid of leakage due to radiation. This extension also provides more smooth transition between the ridge gap waveguide and the microstrip line packaged with similar periodic structure. One important point that should be taken into consideration is that the substrate thickness of the microstrip line must be exactly the same as the gap height in the ridge gap structure. |
| Starting Page | 215 |
| Ending Page | 215 |
| File Size | 34972 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781479937462 |
| DOI | 10.1109/USNC-URSI.2014.6955597 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-07-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Waveguide transitions Fabrication Dielectric constant Educational institutions Microstrip Substrates |
| Content Type | Text |
| Resource Type | Article |
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...
|