Sökning: "Reverberation chamber"

Visar resultat 16 - 20 av 22 avhandlingar innehållade orden Reverberation chamber.

  1. 16. A Method of Moments Solution for Wires Inside a Reverberation Chamber using Spectral Domain Techniques

    Författare :Kristian Karlsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis describes a method of moment code that can be used for analyzing PEC objects in a reverberation chamber. A major part of the thesis deals with the derivation of an efficient Green¡¯s functions for a PEC cavity in general and a reverberation chamber in particular. LÄS MER

  3. 17. Transmission loss of vehicle seals

    Författare :Qi Li; Leping Feng; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vehicle seals; reverberation room test; contact analysis; simple model; mass law; FEM analysis; distorted circular duct model; Acoustics; Akustik;

    Sammanfattning : Sound transmission loss of vehicle seals was studied in this thesis. Reverberation room test and semi-anechoic chamber test were respectively studied. LÄS MER

  4. 18. Over-the-Air Performance Estimation of Wireless Device Antennas

    Författare :Sathyaveer Prasad; Peter Händel; Gert Frölund Pedersen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis work presents studies on the available measurement methods for estimating the over-the-air (OTA) performance of wireless device antennas. This thesis is divided into two parts. LÄS MER

  5. 19. Antennas and Antenna Measurement Techniques for Mobile Communication Terminals

    Författare :Paul Hallbjörner; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Mobile communication is expanding rapidly, finding new uses and pushing the development of terminals. There are many systems in use today, for example mobile phone systems for voice communication, satellite navigation/positioning systems, and short range data communication. LÄS MER

  7. 20. Multiport Antenna Systems for Space-Time Wireless Communications

    Författare :Nima Jamaly; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spatial Correlation; Multiport Matching Efficiency; Multiport Antennas; Uncorrelated Multipath.; Richness Threshold; Multiport Effective Length; Pattern Overlap Matrix; Multiport Effective Area; Non-rich Multipath; Covariance Matrix; Predictor Antenna System; Correlated Multipath;

    Sammanfattning : Multiport antenna systems are indispensable part of modern wireless communication systems. Their crucial impact on the overall performance requires sufficient regard and dedication to a precise design and characterisation. This concern has been to a considerable extent addressed in the frame of the current thesis. LÄS MER