Return Path Discontinuity Analysis of an Edge Mount SMA Launch Structure in Multilayer Boards
Return-path discontinuity of an edge-mount SubMiniature version A (SMA) launch structure in multilayer boards, widely used in high-frequency fixtures and boards, is analyzed, and a simple equation to quantitatively estimate the frequency bandwidth without signal distortions is proposed. The proposed equations are experimentally validated for various physical dimensions, and a simple circuit model is demonstrated to take the return-path discontinuity into account in the channel simulations. In addition, based on the understanding of the return current discontinuity, quantitative design guides are drawn and a technique using an edge plating to enhance the bandwidth up to 50 GHz is demonstrated.
C. Hwang et al., "Return Path Discontinuity Analysis of an Edge Mount SMA Launch Structure in Multilayer Boards," IEEE Transactions on Electromagnetic Compatibility, vol. 60, no. 2, pp. 453-458, Institute of Electrical and Electronics Engineers (IEEE), Apr 2018.
The definitive version is available at https://doi.org/10.1109/TEMC.2017.2735802
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
De-embedding; Fixture; Launch structure; Multilayer high-speed board; SubMiniature version A (SMA) connector
International Standard Serial Number (ISSN)
Article - Journal
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