Refine
Year of publication
Document Type
- Conference Proceeding (36)
- Article (reviewed) (8)
- Part of a Book (4)
- Contribution to a Periodical (4)
- Article (unreviewed) (3)
- Patent (1)
Conference Type
- Konferenzartikel (31)
- Konferenz-Abstract (2)
- Konferenz-Poster (2)
- Sonstiges (1)
Language
- English (56) (remove)
Keywords
- E-Learning (4)
- Couplings (3)
- Design automation (3)
- Finite difference methods (3)
- Mobile Learning (3)
- Virtuelle Realität (3)
- mobile learning (3)
- Algorithmus (2)
- FETs (2)
- Finite-Elemente-Methode (2)
- Frequency (2)
- Integrated circuit interconnections (2)
- Microwave devices (2)
- Mikrowelle (2)
- Optik (2)
- Photonik (2)
- Resonator (2)
- Semiconductor device packaging (2)
- Transceivers (2)
- content adaptation (2)
- device independent learning (2)
- e-learning (2)
- m-learning (2)
- virtual reality (2)
- (COM) (1)
- 3D User Interface (1)
- 3D displays (1)
- 3D modeling (1)
- 3D printing (1)
- 3D virtual reality (1)
- Agent based sensor (1)
- Aircraft (1)
- Android (1)
- App <Programm> (1)
- Approximation (1)
- Attenuation (1)
- Beschichtung (1)
- Blended Learning (1)
- CAD (1)
- Ceramic band pass filters (1)
- Closed-form solution (1)
- Cloud Security (1)
- Cloud Service Provider (1)
- Cloud User (1)
- Cloud computing (1)
- Coatings (1)
- Collaborative learning (1)
- Communication networks (1)
- Computersysteme (1)
- Couplers (1)
- DVB-T (1)
- Data communications (1)
- Data modeling (1)
- Databases (1)
- Datenerfassung (1)
- Datenmanagement (1)
- Device independency (1)
- Differential equations (1)
- Downlink (1)
- Dynamically Generated Content (1)
- Electromagnetic compatibility (1)
- Electromagnetic fields (1)
- Electromagnetic scattering (1)
- Elektromagnetismus (1)
- Energy storage (1)
- Enhanced Security (1)
- Equivalent circuits (1)
- Eye tracking (1)
- Filters (1)
- Finite-Differenzen-Methode (1)
- Flashcards (1)
- Funktechnik (1)
- Gratings (1)
- Handy (1)
- In-flight entertainment (1)
- Intelligentes Stromnetz (1)
- Internet Overlay networks (1)
- Joining Processes (1)
- Joining processes (1)
- Knowledge sharing (1)
- Kupplung (1)
- Language acquisition (1)
- Language learning (1)
- M-learning (1)
- Mathematik (1)
- Microwave integrated circuits (1)
- Microwave integrated circuits Equivalent circuits (1)
- Microwave theory and techniques (1)
- Mobile device (1)
- Mobile devices (1)
- Mobiles Endgerät (1)
- Mobilfunk (1)
- Network topology (1)
- Netzwerk (1)
- Online Learning (1)
- Online Student Services (1)
- Peer to peer computing (1)
- Peer to peer network (1)
- Propagation losses (1)
- Rails (1)
- Random call model (1)
- Routing (1)
- S-parameters (1)
- Segmentierung (1)
- Smart grids (1)
- Spannung (1)
- Spektrum-Monitoring (1)
- Spiel (1)
- Sprachkurs (1)
- Student activities (1)
- Time series data (1)
- Transducers (1)
- Transmission (1)
- Transmission line matrix methods (1)
- Transmission lines (1)
- User generated content (1)
- User interface (1)
- VR (1)
- Virtual Reality (1)
- Virtual private networks (1)
- Virtual reality (1)
- agent (1)
- agent based systems (1)
- approximate histograms (1)
- bio-inspired models (1)
- circuit CAD (1)
- collaborative learning (1)
- content formatting (1)
- content synchronization (1)
- coupled-mode formalism (1)
- device detection (1)
- device independency (1)
- dielectric resonators (1)
- distributed computing (1)
- electronic engineering computing (1)
- flashcard (1)
- generalized content (1)
- guided waves (1)
- kanal (1)
- language learning (1)
- microwave circuits (1)
- mobile applications development (1)
- mobile devices market (1)
- mobile web (1)
- mobile web design guidelines (1)
- multidimensional flashcard (1)
- optics (1)
- peer to peer network (1)
- photonics (1)
- reliability (1)
- remote laboratory (1)
- self-organizing networks (1)
- sensor node (1)
- strip line components (1)
- time series data (1)
- transmission-matrix approach (1)
- wireless comunication (1)
- Überwachung (1)
Institute
- Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) (49)
- Fakultät Medien und Informationswesen (M+I) (bis 21.04.2021) (11)
- Fakultät Elektrotechnik, Medizintechnik und Informatik (EMI) (ab 04/2019) (1)
- ivESK - Institut für verlässliche Embedded Systems und Kommunikationselektronik (1)
Open Access
- Open Access (22)
- Closed (19)
- Bronze (10)
- Closed Access (7)
- Gold (1)
The embedding of microwave devices is treated by applying the finite-difference method to three-dimensional shielded structures. A program package was developed to evaluate electromagnetic fields inside arbitrary transmission-line connecting structures and to compute the scattering matrix. The air bridge, the transition through a wall, and the bond wire are examined as interconnecting structures. Detailed results are given and discussed regarding the fundamental behavior of embedding.
Structures for interconnecting active microwave semiconductor-devices, e.g. FET's and MIC's, with the electrical surrounding or with each other have to be designed more and more carefully when increasing the desired upper frequency limit. Therefore, several connecting structures for device embedding have been examined. Mainly, their applicability for the frequency range from 10 GHz to 100 GHz was considered. Additionally, different equivalent circuits were developed to approximately describe their behaviour for CAD-applications.
It is demonstrated that microwave structures incorporating dielectric resonators (DR) are accurately characterised by means of a 3-dimensional finite-difference CAD package. All major assumptions made so far have been dropped, offering the possibility of a rigorous analysis of the embedding of dielectric resonators into microwave structures. In particular, a finite thickness for the microstrip conductor has been taken into account. The coupling of the DR to a microstrip placed in a metallic housing has been theoretically and experimentally investigated. Theoretical and experimental results are in good agreement and give new insight into DR coupling to microstrip circuits.
The advantages of the coupling-of-modes (COM) formalism and the transmission-matrix approach are combined to create exact and computationally efficient analysis and synthesis CAD tools for the design of SAW-resonator filters. The models for the filter components, especially gratings, interdigital transducers (IDTs). and multistrip couplers (MSCs), are based on the COM approach, which delivers closed-form expressions. In order to determine the relevant COM parameters, the integrated COM differential equations are compared with analytically derived expressions from the transmission-matrix approach. The most important second-order effects such as energy storage, propagation loss and mechanical and electrical loading are fully taken into account. As an example, the authors investigate a two-pole, acoustically coupled resonator filter at 914.5 MHz on AT quartz. Excellent agreement between theory and measurement is found.
The advantages of the coupled-mode (COM) formalism and the transmission-matrix approach are combined in order to create exact and computationally efficient analysis and synthesis tools for the design of coupled surface acoustic wave resonator filters. The models for the filter components, in particular gratings, interdigital transducers (IDTs) and multistrip couplers (MSCs), are based on the COM approach that delivers closed-form expressions. To determine the pertinent COM parameters, the COM differential equations are solved and the solution is compared with analytically derived expressions from the transmission-matrix approach and the Green's function method. The most important second-order effects, such as energy storage, propagation loss, and mechanical and electrical loading, are fully taken into account. As an example, a two-pole, acoustically coupled resonator filter at 914.5 MHz on AT quartz is investigated. Excellent agreement between theory and measurement is found.
Nowadays the processing power of mobile phones, smartphones and PDAs is increasing as well as the transmission bandwidth. Nevertheless there is still the need to reduce the content and the need of processing the data. We discuss the proposals and solutions for dynamic reduction of the transmitted content. For that, device specific properties are taken into account, as much as for the aim to reduce the need of processing power at the client side to be able to display the 3D (virtual reality) data. Therefore, well known technologies, e.g. data compression are combined with new developed ideas to reach the goal of adaptive content transmission. To achieve a device dependant reduction of processing power the data have to be preprocessed at the server side or the server even has to take over functionality of weak mobile devices.