Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Mokhti, Z.A. Tasker, P.J. Lees, J. |
| Copyright Year | 2014 |
| Description | Author affiliation: Centre for High Freq. Eng., Cardiff Univ., Cardiff, UK (Mokhti, Z.A.; Tasker, P.J.; Lees, J.) |
| Abstract | Achieving optimal efficiency in FET-based power amplifiers used in envelope tracking (ET) architectures can be difficult, mainly due to the dynamic variation of drain-to-source capacitance $(C_{ds})$ with applied drain voltage. If, for example class-F or inverse class-F high-efficiency modes are used, there is clearly a motivation to maintain devices in high-efficient states, over as much of the dynamic range as possible, where the operating supply voltage varies quite dramatically. In order to identify optimal matching solutions, the optimum fundamental and harmonic impedances need to be determined and understood at different drain voltages $(V_{ds}).$ Using time-domain waveform measurements and active harmonic load-pull at the device current generator plane, this paper analyzes the behavior of the current and voltage waveforms present at the output of a 10W high-voltage laterally diffused metal oxide semiconductor (HVLDMOS) device in an emulated ET setting. The measurement system is used to robustly engineer optimized class-F operation at different drain voltages at an operating frequency of 900MHz. A design methodology is then discussed that allows optimized power amplifier performance for different average $V_{ds},$ within the operational ET supply voltage range, and the impact this has on overall efficiency. |
| Starting Page | 357 |
| Ending Page | 360 |
| File Size | 583315 |
| Page Count | 4 |
| File Format | |
| ISBN | 9782874870361 |
| DOI | 10.1109/EuMIC.2014.6997866 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-10-06 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | European Microwave Association - EUMA |
| Subject Keyword | Voltage measurement Class F Harmonic analysis Generators Microwave amplifiers inverse class F ET Current measurement envelope tracking Power amplifiers high efficiency waveform engineering power amplifiers Impedance |
| 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...
|