Blar i USN Open Archive på forfatter "Hanke, Ulrik"
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Competing anticlastic and piezoelectric deformation at large deflections
Salmani, Hamed; Hanke, Ulrik; Halvorsen, Einar (Peer reviewed; Journal article, 2021)In bending of a purely elastic beam or plate, it is well established that the cross-sectional shape changes character with decreasing bending radius-of-curvature and that the transition can be characterized by the Searle ... -
Constitutive Equations of Piezoelectric Layered Beams with Interdigitated Electrodes
Nguyen, Cuong Hung; Hanke, Ulrik; Halvorsen, Einar (Peer reviewed; Journal article, 2018)This paper establishes the constitutive equations, or linear two-port models, of piezoelectric layered beams with interdigital electrodes (IDEs). The effect of the nontrivial field on the transduction is analyzed. Based ... -
Design and Fabrication of a High-Frequency Lithium Niobate (LN) Resonator for 5G Applications
Ali, Ibrahim Abdo Yousef (Master thesis, 2024)Laterally excited bulk acoustic wave resonators (XBARs) have gained increasing interest in the past few years for their large bandwidth at high-frequencies utilized in 5G applications. This thesis aims to develop a fabrication ... -
Design and Simulation of Surface Acoustic Wave Resonators using Multiple Models
Hoang Van, Nhat (Master thesis, 2024)The development of the modern mobile telecommunication system standards has posed new performance requirements for all devices in this domain. The increase in the amount of data transmission means that more filtering ... -
Design of a switchable driving coil for Magnetic Resonance Wireless Power Transfer
Zhaksylyk, Yelzhas; Hanke, Ulrik; Azadmehr, Mehdi (Chapter; Peer reviewed, 2019)This paper presents design and analysis of a switchable inductor suited for active impedance matching in magnetic resonance wireless power transfer systems. The switchable inductor is compact and can be used as both driving ... -
Detection of Ungrounded Objects on Mutual Capacitance Touch Screens
Thoresen, Christian Bjørge; Hanke, Ulrik; Øvergård, Kjell Ivar (Chapter, 2015)Mutual capacitance touch screens are responsible for detecting billions of human fingers touching them around the world every day. Being able to use such screens for detection of ungrounded objects as well, would make it ... -
Improved quality factor on lamb wave resonators using a phononic crystal structure array
Hasle, Sander (Master thesis, 2023)This thesis explores the possibility of increasing the quality factor of a lamb wave resonator device with the use of a phononic crystal structure array on the surface of the bridge suspending the device. In the growing ... -
Modal analysis of piezoelectrically actuated plates with built-in stress by computationally augmented interferometric experiments
Salmani, Hamed; Bodo, Elisabetta; Hanke, Ulrik; Vogl, Andreas; Jain, Shruti; Merlo, Sabina; Halvorsen, Einar (Peer reviewed; Journal article, 2022)The conventional laser doppler vibrometers for modal analysis of micro-structures are expensive and sometimes inaccessible. In this work, a compact, fiber-based interferometric setup is used to carry out the modal analysis ... -
Modeling of Ungrounded Tangibles on Mutual Capacitance Touch Screens
Thoresen, Christian Bjørge; Hanke, Ulrik (Peer reviewed; Journal article, 2019)Tangible user interface for touch screens, where interaction happens through tangible objects placed on the screen, is one possible option for addressing the lack of haptic feedback in touch screens. For the development ... -
Numerical simulation of microplastics trapping in a microfluidic channel utilizing travelling acoustic waves
Farahi Bolamiri, Farshad (Master thesis, 2023)A numerical simulation based on a novel acoustofluidics model with travelling surface acoustic waves has been provided. An acoustic radiation force equation from travelling acoustic waves has been introduced to COMSOL ... -
Optimized DRIE process for different size membranes fabricated simultaneously
Tang, Jin (Master thesis, 2023)The rapid development of wireless communication systems raises the high demand for high Q factor resonators. To fabricate a high Q factor resonator, a precise membrane is important. It requires fabricating different sizes ... -
Recent developments in optical detection technologies in Lab-on-a-Chip devices for biosensing applications
Pires, Nuno Miguel Matos; Dong, Tao; Hanke, Ulrik; Hoivik, Nils (Journal article; Peer reviewed, 2014)The field of microfluidics has yet to develop practical devices that provide real clinical value. One of the main reasons for this is the difficulty in realizing low-cost, sensitive, reproducible, and portable analyte ... -
The Characterisation and Quantification of Immobilised Concanavalin A on Quartz Surfaces Based on The Competitive Binding to Glucose and Fluorescent Labelled Dextran
Hoang, Trinh Bich; Stokke, Bjørn Torger; Hanke, Ulrik; Johannessen, Agne; Johannessen, Erik Andrew (Journal article; Peer reviewed, 2019)The competition between various carbohydrates in the binding to Concanavalin A (Con A) can be exploited in gravimetric microsensors that detect changes in mass or viscoelasticity as a function of glucose concentration. ... -
The impact of area on BAW resonator performance and an approach to device miniaturization
Nguyen, Ngoc; Johannessen, Agne; Rooth, Stig; Hanke, Ulrik (Journal article; Peer reviewed, 2018)The dependence of the performance of thin film bulk acoustic resonator (FBAR) and solidly mounted resonator (SMR), on their areas is studied with the aid of finite element method (FEM) software. Dual step frame method is ... -
Trial functions for reduced-order models of piezoelectrically actuated microelectromechanical systems tunable lenses
Farghaly, Mahmoud A.; Hanke, Ulrik; Akram, Muhammad Nadeem; Halvorsen, Einar (Journal article; Peer reviewed, 2018)Piezoelectrically actuated microelectromechanical systems (MEMS) lens structures can be composed of a clamped square elastic diaphragm partially covered with a thin piezoelectric film leaving a circular transparent region ... -
Tunable lowpass filter with RF MEMS capacitance and transmission line
Saha, Shimul Chandra; Hanke, Ulrik; Sagberg, Håkon; Fjeldly, Tor A; Sæther, Trond (Journal article; Peer reviewed, 2012)We have presented an RF MEMS tuneable lowpass filter. Both distributed transmission lines and RF MEMS capacitances were used to replace the lumped elements. The use of RF MEMS capacitances gives the flexibility of tuning ... -
A unified approach for the calculation of in-plane dielectric constant of films with interdigitated electrodes
Ræder, Trygve Magnus; Hanke, Ulrik; Halvorsen, Einar; Grande, Tor (Peer reviewed; Journal article, 2020)Interdigitated electrodes (IDEs) on dielectric films is an important electrode design in electrical components such as transducers and sensors. Further development and use of IDEs for characterization of the in-plane ...