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A generalized method for distinguishing between radiation and surface-wave losses in microstrip discontinuities

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4 Author(s)
Tzyy-Sheng Horng ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Wu, S.-C. ; Yang, H.-Y. ; Alexopoulos, N.G.

A generalized method for calculating both radiation and surface-wave losses is developed for microstrip discontinuities. The losses are determined by a rigorous Poynting vector analysis where the current distribution over the microstrip discontinuities is a result of a full-wave moment method solution. The power loss mechanism of such microstrip discontinuities as open-end, right-angle-bend, gap and stub lines, EMC lines, and rectangular patches are investigated. A self-consistency check of the result based on power conservation is performed to confirm the numerical results. It is found that, above a certain frequency, the surface-wave loss becomes more important than the radiation loss

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:38 ,  Issue: 12 )