On the FEM treatment of wedge singularities in waveguide problems

In modern micro- and millimeter wave technology, there exist many different devices based on microstrip lines. These include coplanar waveguides, patch antennas, filters, power dividers, directional couplers etc. In this work, a simple and computationally advantageous extension to a standard 2D polynomial finite element basis is introduced to cope with wedge singularities in uniform cylindrical structures. To enhance the computation, variable-order elements are used.

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