Sökning: "RF Measurement Techniques"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden RF Measurement Techniques.

1. 1. Developing an ML-based model for RF tuning of the DTL machine at ESS

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

   Författare :Amin Hosseini Nejad; [2023]
   Nyckelord :Technology and Engineering;

   Sammanfattning : The European Spallation Source (ESS) infrastructure is being constructed in Lund, and will be one of the most powerful research facilities of its type in the world. The ESS linear accelerator (linac) utilizes different accelerating sections where a wide variety of techniques should be employed to accelerate a beam of protons to 2 GeV kinetic energy through Radio Frequency (RF) cavities before being collided with a tungsten target for the final production of neutrons, through the process of spallation. LÄS MER

3. 2. Property Valuation by Machine Learning and Hedonic Pricing Models : A Case study on Swedish Residential Property

   Master-uppsats, KTH/Fastigheter och byggande

   Författare :Kanha Teang; Yiran Lu; [2021]
   Nyckelord :Real estate valuation; Machine learning; Hedonic Pricing Models; Random Forest; Stockholm; Fastighetsvärderingar; Maskininlärning; hedoniska prissättningsmodeller; Random Forest; Stockholm;

   Sammanfattning : Property valuation is a critical concept for a variety of applications in the real estate market such as transactions, taxes, investments, and mortgages. However, there is little consistency in which method is the best for estimating the property value. LÄS MER

4. 3. Implementation of Spectrum Analysis Functionality for IQ-Signal.

   Master-uppsats, Högskolan i Gävle/Avdelningen för elektroteknik, matematik och naturvetenskap

   Författare :Gedion Biredaw Anbessa; [2020]
   Nyckelord :RF Measurement Techniques; Spectrum Analyzer; Synthetic Spectrum Analysis; Synthetic Instrument; Signal Processing; Vector Signal Analyzer; IQ-signal;

   Sammanfattning : The spectrum analyzer is a standard tool used to measure signals in the frequency domain. Traditional spectrum analyzers are based on sweeping a local oscillator and using this to mix signals down to an intermediate frequency (IF) and, subsequently filter them with a filter of settable characteristics, called the Resolution Bandwidth (RBW). LÄS MER

5. 4. Characterization of Passive Intermodulation Distortion in MultiBand FDD Radio Systems

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

   Författare :Tomás Soares da Costa; [2019]
   Nyckelord :;

   Sammanfattning : Intermodulation distortion (IMD) is a phenomenon that results in generation of spurious distortion signals when two or more signals of different frequencies pass through a nonlinear system. In general, IMD occurs in active circuits of a radio system, however, passive wireless components such as filters, transmission lines, connectors, antennas, attenuators etc. LÄS MER

7. 5. Ray-tracing based analysis of channel characteristics and capacity improvement capabilities of spatial multiplexing and beamforming at 15 and 28 GHz

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

   Författare :Qingbi Liao; [2016]
   Nyckelord :5G; 15 GHz; 28 GHz; beamforming; capacity; channel multiplexing richness; hybrid beamforming; MIMO; mm-Wave; ray-tracing; spatial multiplexing; Technology and Engineering;

   Sammanfattning : In the previous decades, mm-Wave frequency bands have largely been ignored for cellular communication because of the high free space attenuation as well as the cost and complexity of mm-Wave RF circuits. However, with the improvement of RF and antenna technologies over the last decade, it has become feasible to con- sider mm-Wave bands for cellular communications. LÄS MER