Millimeter‐wave six‐port in combined microstrip and substrate‐integrated waveguide technologies

A millimeter-wave six-port implementation using combined substrate-integrated waveguide (SIW) and microstrip technologies, and low-loss short transition between microstrip and SIW is presented. The six-port is implemented using SIW hybrid couplers with continuous metalized grooves and Wilkinson power dividers. The proposed circuit is suitable for 77-GHz radar sensor front ends. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2488–2493, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25538

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