Essays about: "låga frekvenser"

Showing result 1 - 5 of 27 essays containing the words låga frekvenser.

  1. 1. Off-State Stress Effects in AlGaN/GaN HEMTs : Investigation of high-voltage off-state stress impact on performance of and its retention in hybrid-drain ohmic gate AlGaN/GaN HEMTs

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Ivan Krsic; [2023]
    Keywords : HEMT; GaN; off-state stress; memory effects; drain leakage current; dynamic RDSon; threshold voltage instabilities; charge redistribution; HEMT; GaN; stress i avslaget tillstånd; minneseffekter; läckströmmen; dynamisk RDSon; instabiliteten hos styrets tröskelspänning; omfördelningen av laddningar;

    Abstract : High electron mobility transistors (HEMTs) realized using AlxGa1-xN/GaN are relatively new technology which is prominent for high-speed and high-power applications. Some of the main problems with this technology were identified as dynamic RDSon, current collapse and threshold voltage instabilities due to the off-state stress. READ MORE

  3. 2. 6G RF Waveform with AI for Human Presence Detection in Indoor Environments

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Eirini Stratigi; [2022]
    Keywords : CNN; SVM; DBScan; MIMO; Bandwidth; frequencies; human presence detection; CNN; SVM; DBScan; MIMO; Bandbredd; frekvenser; mänsklig närvaro detektering;

    Abstract : Wireless communication equipment is widely available and the number of transmitters and receivers keeps increasing. In addition to communications, wireless nodes can be used for sensing. READ MORE

  4. 3. Dual-polarized geodesic lens in sub-THz

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Wenfu Fu; [2022]
    Keywords : beam scanning; dual polarization; fully metallic; geodesic lens; Luneburg lens antenna; THz; strålskanning; korspolarisering; fullt metallisk; geodetisk lins; Luneburg linsantenn; THz;

    Abstract : In the sub-THz frequency range, the geodesic lens can realize low losses and beam scanning capability with high gain and high aperture efficiency due to its fully metallic property and rotational symmetry. Therefore, in high-frequency applications, a geodesic lens is considered a more promising solution in comparison to phased arrays or other beamforming techniques. READ MORE

  5. 4. Vibration reduction over junctions in buildings

    University essay from KTH/Marcus Wallenberg Laboratoriet MWL

    Author : Alexander Forsberg; Aras Wali; [2021]
    Keywords : Vibration reduction; Junction; Building acoustics; Vibrations minskning; Knutpunkt; Byggnadsakustik;

    Abstract : Structure borne sound can travel multiple paths from one office to another and choosing to sound insulate a specific building element can be difficult since all the building elements are connected together and form a coupled system. The current approach by engineers when investigating transmission paths between spaces in a building is using a computer model and assuming that the junctions are firmly clamped or free. READ MORE

  6. 5. Investigating the Spectral Bias in Neural Networks

    University essay from KTH/Matematik (Avd.)

    Author : Filip Thor; [2021]
    Keywords : spectral bias; frequency principle; neural networks; machine learning; applied mathematics; spectral bias; neurala nätverk; maskininlärning; tillämpad matematik;

    Abstract : Neural networks have been shown to have astounding performance on a variety of different machine learning tasks and data sets, both for synthetic and real-world data.However, in spite of their widespread usage and implementation, the convergence and the training dynamics of neural networks are neither trivial, nor completely understood. READ MORE