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    Effect of the interference from conducting plates on OAM based wireless communication
    (2019-09)
    Wang, Lei
    ;
    Yang, Cheng
    ;
    Brüns, Heinz-Dietrich
    ;
    Schuster, Christian
    Wireless communication of radio waves carrying orbital angular momentum (OAM) has been extensively studied in the past in a free space environment. In this paper, emphasis is put on the investigation of the interference due to a finite, electrically conducting plate on wireless communication based on OAM waves. First, the effect on the electromagnetic field distribution is demonstrated for varying sizes and locations of the conducting plate. Then, the effect on the wireless communication based on OAM waves in different modes is explored by using mixed-mode matrices. All investigations are based on the simulation of a circular array of electrically short dipoles using an adapted Method of Moments simulation tool. It is found in general that compared to the communication between two single dipoles, the effect of the conducting plate on OAM waves is similar but shows further dependencies. The obtained results imply that conducting surfaces in the vicinity of OAM based communication should be taken into consideration in the system design in realistic applications.
    Publicationtype: Conference Paper
      109
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    Item type:Publication, Access status: without files ,
    Numerical complexity study of solving hybrid multiport field-circuit problems for diode grids
    (2019-09)
    Wendt, Torben
    ;
    Yang, Cheng
    ;
    Schuster, Christian
    ;
    Grivet-Talocia, Stefano
    Nonlinearly loaded multiport structures have promising features for the application of controlling scattered fields. Modelling such structures can lead to investigations up to hundreds or even thousands of ports, which poses a challenge to full-wave simulation techniques. In order to identify limitations for large scale problems, a hybrid simulation method using macromodeling and recursive convolution is adopted due to its scalability. A numerical complexity analysis is carried out for the extraction of frequency data, macromodeling of the network parameters and computation of transient responses. Of particular interest are the number of ports, load types, wave excitations and field probes. Bottlenecks are identified and possible improvements of the adopted method are proposed.
    Publicationtype: Conference Paper
      254