A port element for p-adaptive S-parameter calculation

• Published in: IEEE transactions on magnetics Vol. 35; no. 3; pp. 1530 - 1533
• Main Authors: Gavrilovic, M.M., Webb, J.P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.05.1999; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Boundary conditions; Circuit properties; Convergence; Devices; Electric, optical and optoelectronic circuits; Electronics; Equations; Exact sciences and technology; Finite element methods; Impedance; Mathematical analysis; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwave devices; Microwaves; Polynomials; Ports; Rectangular waveguides; Scattering; Scattering parameters; Segments; Voltage; Waveguides, transmission lines, striplines; Finite element method; Wave scattering; Theoretical study; Microwave; Numerical simulation; Waveguide; Adaptation
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.767259

A new element is proposed for the treatment of ports in p-adaptive finite-element analysis of microwave devices. The element consists of a number of segments, on each of which the field is represented by high-order, hierarchical polynomials that match those used in the interior. As the p-adaption proceeds, the number of waveguide modes taken into account on the port increases, and so does the accuracy of the port boundary condition. Results for several H-plane problems in rectangular waveguide demonstrate that, with the new element, adaptive convergence to the same scattering parameters can be achieved no matter how closely the ports are placed.