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Item type:Publication, Access status: without files , Ultra-wideband small antenna subarray module with narrow elevation patternWe propose a small ultra-wideband antenna subarray module with narrow elevation pattern for future use in antenna arrays providing spatial processing capabilities such as Direction-Of-Arrival estimation in the azimuth plane, for the frequency range from 5 GHz to 8 GHz. The proposed subarray design is based on four mutually coupled Vivaldi antennas stacked on a common substrate in the E-Plane, with an element distance of delem ≤ λ 0, high/2. We optimize the antenna element in an infinite E-plane array configuration and show that the truncation effects when reducing the infinite array to only four elements do even improve the total scan element reflection for broadside excitation. In addition our design does not utilize a parallel-plate to microstrip balun at the feed point of each antenna element. Instead we use a novel ultra-wideband and geometrically small hybrid ring coupler to realize an ultra-wideband corporate feed network directly in parallel plate technology.Publicationtype: Conference Paper92 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , 61 GHz Six-Port radar frontend for high accuracy range detection applications(2013-09); ; ; ; Range detection is an challenging task, especially if high accuracy has to be reached. The hereby proposed 61 GHz continuous wave radar system is based on a phase detector using Six-Port technique. For accuracy enhancement an improved isolation radar coupler has been introduced for broadband frequency modulated continuous wave radar as well as narrow band radar techniques. Furthermore, a Six-Port network based on four hybrid couplers is presented. Finally, the most important system sub-components have been validated by measurements.Publicationtype: Conference Paper83