Sökning: "aperiodic array"

Hittade 3 avhandlingar innehållade orden aperiodic array.

  1. 1. Aperiodic Array Synthesis for Telecommunications

    Författare :Carlo Bencivenni; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PtP; mutual coupling; SATCOM; compressive sensing; aperiodic array; density taper; MU-MIMO; maximally sparse array; LoS-MIMO;

    Sammanfattning : Arrays of antennas offer important advantages over single-element antennas and are thus a key part of most advanced communication systems. The majority of current arrays are based on a classical regular layout, which offer simple design criteria despite some limitations. LÄS MER

  3. 2. Sparse Array Synthesis of Complex Antenna Elements

    Författare :Carlo Bencivenni; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mutual coupling; array signal processing; maximally sparse array; aperiodic array; symmetric layout.; phase scanning; compressive sensing;

    Sammanfattning : Arrays of antennas can significantly improve the performances and extend the capabilities of single-element antennas. However, antenna arrays are expensive solutions and therefore it is critical to keep the costs to a minimum. LÄS MER

  4. 3. Effects of aperiodic order for Josephson junction arrays and discrete breathers

    Författare :Erik Lennholm; Linköpings universitet; []
    Nyckelord :Aperiodic order; Josephson junction array; Discrete breather;

    Sammanfattning : Effects of the combination of nonlinearities and aperiodic order is studied in this thesis. The nonlinear systems considered are Josephson junction arrays (JJA) and Fermi-Pasta-Ulam (FPU) lattices. Both systems are discrete and one-dimensional. The traveling waves in a JJA are solitons, i. LÄS MER