Sökning: "Frequency sensitive mode"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Frequency sensitive mode.

1. 1. mmWave Coverage Extension Using Reconfigurable Intelligent Surfaces in Indoor Dense Spaces

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Zhenyu Li; [2023]
   Nyckelord :mmWave Communication; Reconfigurable Intelligent Surface; Ray Tracing; Indoor Dense Spaces;

   Sammanfattning : Millimeter-wave (mmWave) is widely investigated for indoor communication scenarios thanks to the available rich spectrum. However, the shortened antenna size and the high frequency make mmWave extra sensitive to blockages. LÄS MER

3. 2. Coexistence of Dual Inductive Wireless Power Transfer Systems

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Eneas Hållsten; [2022]
   Nyckelord :Technology and Engineering;

   Sammanfattning : Wireless power transfer is emerging into everyday life. The idea is to create a more convenient way of charging, or at least powering, devices. LÄS MER

4. 3. Enhancing Sensing in Nanoscale: Investigation of Smart Nanomechanical Cantilever Array

   Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Författare :Hiruy Michael Weldegiorgish; [2022]
   Nyckelord :Cantilever; AFM; Biosensor; Piezoresistive sensor; Piezoelectric actuator; Kantilever; AFM; Biosensor; Piezo -resistorer; Piezo-elektiska pådrivare;

   Sammanfattning : In this report, a novel smart nanocantilever with self-deflection sensor using embedded piezo-resistor and self-actuation using integrated piezo-electric actuator is proposed, designed and simulated to enable highly sensitive label free biosensor and ultra-short cantilever probe for AFM applications. The smart nanocantilever comprises of a triangular Si3N4 nanocantilever (10µm long, 400nm width and 100nm thickness) connected to a multi-layer support structure (Si3N4 (100nm)/PZT (100nm)) having n-type silicon piezo resistor (7µm long ,2µm width and 20nm thickness) embedded in the Si3N4 layer in both the support structure and nanocantilever. LÄS MER

5. 4. Capacitive Micromachined Ultrasonic Transducers for Underwater Applications

   Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Patrick Johansson; [2021]
   Nyckelord :CMUT; capacitive; micromachined; ultrasonic; transducer; model;

   Sammanfattning : Capacitive micromachined ultrasonic transducers (CMUT:s) are often used in medical imaging and they show some promise as underwater transducers. This thesis collates the available information about how CMUT:s operate, their strengths and weaknesses and investigates their efficiency as an underwater transducer. LÄS MER

7. 5. System modelling of a tightening tool

   Master-uppsats, KTH/Teknisk mekanik

   Författare :Caroline Eriksson; [2020]
   Nyckelord :;

   Sammanfattning : With the help of modern computational power it has become much more common to employ simulation driven development. When performing simulations before creating prototypes and actual test, companies can reduce both the time spent on the development and the cost. LÄS MER