Search Results - "Nickel, Matthias"
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Microwave Liquid Crystal Technology
Published in Crystals (Basel) (01-09-2018)“…Tunable Liquid Crystal (LC)-based microwave components are of increasing interest in academia and industry. Based on these components, numerous applications…”
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2
Liquid Crystal Based Dielectric Waveguide Phase Shifters for Phased Arrays at W-Band
Published in IEEE access (2019)“…In this work, the feasibility of microwave liquid crystal based dielectric waveguide phased shifters is investigated in a phased rod antenna array for the…”
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3
Ridge Gap Waveguide Based Liquid Crystal Phase Shifter
Published in IEEE access (2020)“…In this paper, the gap waveguide technology is examined for packaging liquid crystal (LC) in tunable microwave devices. For this purpose, a line based passive…”
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4
Reconfigurable Millimeter-Wave Components Based on Liquid Crystal Technology for Smart Applications
Published in Crystals (Basel) (01-05-2020)“…This paper presents recent development of tunable microwave liquid crystal (LC) components in the lower millimeter wave (mmW) regime up to the W-band. With the…”
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5
Local positivity and effective Diophantine approximation
Published in Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg (01-10-2022)“…In this paper we present a new approach to prove effective results in Diophantine approximation. This approach involves measures of local positivity of…”
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6
Performance Analysis of Reconfigurable Bandpass Filters With Continuously Tunable Center Frequency and Bandwidth
Published in IEEE transactions on microwave theory and techniques (01-11-2017)“…This paper presents a comparison and performance evaluation of three different technologies for the implementation of tunable filters utilizing semiconductor…”
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7
Tunable Liquid Crystal Filter in Nonradiative Dielectric Waveguide Technology at 60 GHz
Published in IEEE microwave and wireless components letters (01-01-2019)“…This letter presents a continuously tunable nonradiative dielectric waveguide three-pole bandpass filter based on liquid crystal (LC) technology at 60 GHz. LC…”
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8
A Millimeter-Wave Beam-Steering Lens Antenna With Reconfigurable Aperture Using Liquid Crystal
Published in IEEE transactions on antennas and propagation (01-08-2019)“…For the first time, a liquid crystal (LC) filled lens antenna is investigated for beam steering in this paper. The LC's anisotropy is applied inside a…”
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9
Bounded Volume Denominators and Bounded Negativity
Published in International mathematics research notices (01-12-2021)“…Abstract In this paper, we study the question of whether on smooth projective surfaces the denominators in the volumes of big line bundles are bounded. In…”
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10
Liquid-Crystal-Based Fully Dielectric Lateral Wave Beam-Steering Antenna
Published in IEEE antennas and wireless propagation letters (01-12-2019)“…This letter presents a fully dielectric beam-steering lateral antenna operating at the V-band (50 GHZ). The antenna consists of a semicircular Rexolite body…”
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11
Hybrid Time-Frequency Modulation Scheme for Chipless Wireless Identification and Sensing
Published in IEEE sensors journal (01-10-2018)“…This paper presents a novel hybrid time-frequency modulation scheme for the integration of chipless wireless identification and sensors. Combining the wide…”
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12
Algebraic volumes of divisors
Published in European journal of mathematics (01-12-2019)“…The volume of a Cartier divisor on a projective variety is a nonnegative real number that measures the asymptotic growth of sections of multiples of the…”
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13
Towards an Embedded System for Failure Diagnosis in Drones Using AI and SAC-DM on FPGA
Published in 2024 Design, Automation & Test in Europe Conference & Exhibition (DATE) (25-03-2024)“…We present a way of failure detection in real-time unmanned aerial vehicles (UAVs) by integrating Chaos Theory and AI techniques on an FPGA board. The Signal…”
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Conference Proceeding -
14
A Fully Dielectric Lightweight Antenna Array Using a Multimode Interference Power Divider at W-Band
Published in IEEE antennas and wireless propagation letters (01-01-2017)“…In this letter, we present a fully dielectric antenna array for the first time, including a single multimode interference power divider as feeding network…”
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15
A Compact Two-dimensional Power Divider for a Dielectric Rod Antenna Array Based on Multimode Interference
Published in Journal of infrared, millimeter and terahertz waves (01-12-2018)“…In this work, multimode interference is investigated for the design of a two-dimensional fully dielectric power divider, well suited for the usage of…”
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16
Miniaturized Liquid Crystal Slow Wave Phase Shifter Based on Nanowire Filled Membranes
Published in IEEE microwave and wireless components letters (01-08-2018)“…This letter presents the realization of a miniaturized liquid crystal slow wave phase shifter at <inline-formula> <tex-math notation="LaTeX">V…”
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17
Liquid Crystal Phase Shifter Based on Nonradiative Dielectric Waveguide Topology at W-Band
Published in 2019 IEEE MTT-S International Microwave Symposium (IMS) (01-06-2019)“…This paper presents a continuously tunable nonradiative dielectric waveguide (NRD) phase shifter based on liquid crystal (LC) technology at W-band. LC is…”
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Conference Proceeding -
18
Local positivity and effective Diophantine approximation
Published 13-05-2020“…In this paper we present a new approach to prove effective results in Diophantine approximation. We then use it to prove an effective theorem on the…”
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Journal Article -
19
Hybrid time-frequency modulation scheme for chipless wireless identification and sensing
Published in 2017 IEEE SENSORS (01-10-2017)“…In this paper, a novel hybrid time-frequency modulation scheme for the integration of chipless wireless identifications and sensors is presented. This approach…”
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Conference Proceeding -
20
A Dielectric Waveguide Switch based on Tunable Multimode Interference at W-band
Published in 2018 IEEE/MTT-S International Microwave Symposium - IMS (01-06-2018)“…This work presents a compact and lightweight dielectric waveguide (DW) switch at W-band, which uses liquid crystal (LC) technology for tuning multimode…”
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Conference Proceeding