Title :
Full-wave, finite element analysis of irregular microstrip discontinuities
Author :
Jackson, Robert W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
1/1/1989 12:00:00 AM
Abstract :
Finite-element expansion currents are used to formulate a full-wave analysis of microstrip discontinuities. With this approach, a rigorous analysis of fairly irregular structures is possible, including radiation and surface wave effects as well as coupling between closely spaced junctions. The step, stub, and bent-stub discontinuities are analyzed using this technique. Measurements are made of three stub structures. Measured resonant frequencies agree with full-wave calculations to within 2% when the nominal measured dielectric constant and structure dimensions are used as input. Using the absolute worst case dielectric constants and dimensions as input gives an error of 3% for the low-frequency stub and less than that for the other stubs
Keywords :
finite element analysis; strip lines; waveguide theory; bent-stub; closely spaced junctions; coupling; dielectric constant; finite element analysis; finite element expansion currents; full-wave analysis; irregular structures; microstrip discontinuities; radiation effects; resonant frequencies; step type; stub structures; surface wave effects; Coupling circuits; Design automation; Finite element methods; Frequency; Integrated circuit measurements; Microstrip antennas; Microwave theory and techniques; Millimeter wave integrated circuits; Passive circuits; Surface waves;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
