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Item type:Publication, Access status: without files , A planar 24 GHz switched-beam antenna based on Pin diodes for remote sensing applicationsThis paper presents a planar switched-beam antenna for remote sensing applications at 24 GHz. The antenna consists of 9x8 radiating patches, arranged as nine linear arrays that are connected by phase shifters based on PIN diodes, which allow to quickly switch the main lobe between two symmetric states by using a small control current. The single array elements were designed and simulated in CST Microwave Studio and the array feed network including the phase shifters was analyzed using Keysight ADS. Measurements of all individual components and the final array antenna were taken to confirm the simulations and to prove the concept.Publicationtype: Conference Paper90 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Contactless carotid pulse measurement using continuous wave radarCardiovascular diseases are one of the major causes of death. Regular checkups and preventive actions can drastically help reducing fatal incidences. This can be achieved by monitoring the carotid artery or rather the carotid pulse signal. Commonly, ultrasound devices are used for that purpose. However, these devices are costly, mostly stationary and their usage requires training and experience. This paper investigates the possible usage of radar systems as a contactless and low-cost alternative for carotid pulse measurements. Theoretical investigations reveal a linear relationship between the measurands of both devices and synchronous recordings from three test persons further confirm the feasibility of using radar systems as a potential device for monitoring cardiovascular diseases.Publicationtype: Conference Paper111 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Evaluation of ISAR-based autofocus methods for estimation of true-speed-over-ground using a 24 GHz FMCW-RadarThis paper presents a novel approach for the determination of True-Speed-Over-Ground for trains. The approach utilizes the inverse synthetic aperture radar (ISAR) technique. Several focus metrics are evaluated and tested. The tests were carried out in an laboratory environment. The results are compared to an alternative correlation-based approach.Publicationtype: Conference Paper82 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Advanced terminal antenna concepts for mobile satellite communications(2018-11); ; This paper reports on recent progress in the field of terminal antennas for Ka-band satellite communications, the focus being on mobility scenarios requiring beam steering agility. Selected European activities are briefly reviewed, before a more in-depth view of ongoing work performed at the Hamburg University of Technology is given. Three different approaches are reported. © 2018 IEICEPublicationtype: Conference Paper140