Sökning: "anechoic chamber"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden anechoic chamber.

1. 1. Propagation environment modeling using scattered field chamber

   Författare :Magnus Otterskog; Dag Stranneby; Pertti Vainikainen; Örebro universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reverberation Chamber; Scattered Field Chamber; Propagation environments; Antenna measurements; Electrical engineering; Elektroteknik; Elektronik; Electronics;

   Sammanfattning : This thesis covers the development of the Reverberation Chamber as a measurement tool for cell phone tests in electronic production. It also covers the development of the Scattered Field Chamber as a measurement tool for simulations of real propagation environments. LÄS MER

3. 2. Studies of Three Different Methods to Estimate the Up-link Performance of Mobile Phone Antennas

   Författare :Sathyaveer Prasad; Peter Händel; Claes Beckman; Jan Carlsson; Högskolan i Gävle; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antenna measurements; mobile phones; total radiated power; reverberation chamber; anechoic chamber; Telia Scattered Field Method; Maximum likelihood Estimator; Telecommunication; Telekommunikation;

   Sammanfattning : Antennas play an important role in determining the overall radio performance for wireless communications. If all other radio components perform according to their specifications, the performance of a mobile phone can be entirely determined by measuring the efficiency of its antenna. LÄS MER

4. 3. Effects of Lightning Electromagnetic Pulse and High Power Microwaves on Military Electric Systems

   Författare :Stefan Silfverskiöld; Michel Ianoz; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; LEMP; HPM; electronic warfare; anechoic chamber; reverberation chamber; Teknisk fysik; Engineering physics; Teknisk fysik; Electricity; Esp The Study Of Transients and Discharges; elektricitetslära; ssk studiet av transienter och urladdning;

   Sammanfattning : The awareness of the threat posed by Lightning Electromagnetic Pulse (LEMP) and High Power Microwaves (HPM) against the operational reliability of electric systems is rapidly growing. This has led to an increasing need for reliable tools, experimental as well as theoretical, for design, analysis and verification of system immunity against electromagnetic threats. LÄS MER

5. 4. Evaluation of the Random-LOS Measurement System for Vehicular Communication Applications

   Författare :Madeleine Schilliger Kildal; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reverberation Chamber; Over-the-Air; Anechoic Chamber; Random Line-of-Sight; Rich Isotropic Multipath; wireless communication; car measurements; throughput;

   Sammanfattning : The automotive industry is progressively closing on the Telecom industry as wireless data connection and transmission become more and more important for vehicles. In both future and present cars, the safety and infotainment systems depend on reliable wireless data transmission. This is especially the case when autonomous cars will reach the market. LÄS MER

7. 5. The Random Line-of-Sight Over-the-Air Measurement System

   Författare :Madeleine Schilliger Kildal; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; random line-of-sight; anechoic chamber; reverberation chamber; over-the-air; vehicular communication; wireless communication; throughput; rich isotropic multipath;

   Sammanfattning : As our society becomes increasingly connected, a growing number of devices rely on wireless connectivity. The type, use and form factor of these devices range from wearables to entire vehicles. Additionally, the fifth generation of wireless communication (5G) introduces new communication bands, also at higher frequencies. LÄS MER