Results 21 to 30 of about 46,496 (224)
IEEE Access, 2022 This paper proposes the design of a gain enhanced single circular patch radiator (SCPR) with a cavity-backed structure using multiple substrate integrated waveguide (SIW) feeders for monopulse systems.
Sangwoon Youn +3 more
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A Novel Nonlinear LPDA Design for HF Direction Finding
International Journal of Antennas and Propagation, 2019 A novel design of log-periodic dipole array (LPDA) for high-frequency direction finding (DF) is presented. The traditional Carrel method employs fixed values of scale factor and spacing factors in LPDA designs. Here, we propose a design method which uses
Xiaofei Ren, Hu Li, Shuxi Gong
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Two Rapid Power Iterative DOA Estimators for UAV Emitter Using Massive/Ultra-Massive Receive Array
Drones, 2023 To provide rapid direction finding (DF) for unmanned aerial vehicle (UAV) emitters in future wireless networks, a low-complexity direction of arrival (DOA) estimation architecture for massive multiple-input multiple-output (MIMO) receiver arrays is ...
Yiwen Chen +10 more
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An Ultra-Wide Band Antenna System for Pulsed Sources Direction Finding
Sensors, 2020 Electric discharges in high-voltage power distribution systems can be localized through their electromagnetic signature in the radio-frequency range.
Razvan D. Tamas, Stefania Bucuci
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Design of a Broadband Coupled-Fed Printed Dipole Antenna as an Array Element for Direction Finding Systems [PDF]
Journal of Electromagnetic Engineering and Science, 2019 This article proposes the design of a coupled-fed printed dipole antenna for direction finding (DF) systems. The antenna consists of a radiating 50° angled expanded-arm printed dipole as well as a fan-shaped feeder that is located on the opposite side of
Sungsik Wang +4 more
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Direction finding of auroral VLF hiss in auroral zone
Antarctic Record, 1981 A newly developed direction finding ('DF') for auroral hiss based on the measurement of time differences of wave arrival among three spaced points was carried out around Syowa Station (geomag. lat. -70.4°), Antarctica in 1978-1979. It has been found that
Masanori Nishino, Takeo Hirasawa
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Quality Control for Ocean Current Measurement Using High-Frequency Direction-Finding Radar
Remote Sensing, 2023 High-frequency radars (HFRs) are important for remote sensing of the marine environment due to their ability to provide real-time, wide-coverage, and high-resolution measurements of the ocean surface current, wave height, and wind speed.
Shuqin He +6 more
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Performance analysis of rank reduction estimator in the presence of unexpected modeling errors
Tongxin xuebao, 2011 A performance analysis of the RARE was presented in presence of unexpected modeling errors.First,the closed-form expression of direction-finding（DF） error was given through the first-order Taylor series expansion of the spatial spectrum function,and then
WANG Ding, WU Ying
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IOAM: A Novel Sensor Fusion-Based Wearable for Localization and Mapping
Remote Sensing, 2022 With the development of indoor location-based services (ILBS), the dual foot-mounted inertial navigation system (DF-INS) has been extensively used in many fields involving monitoring and direction-finding.
Renjie Wu +6 more
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On Calibration and Direction Finding with Uniform Circular Arrays
International Journal of Antennas and Propagation, 2019 Antenna array calibration methods and narrowband direction finding (DF) techniques will be outlined and compared for a uniform circular array. DF is stated as an inverse problem, which solution requires a parametric model of the array itself.
Stephan Häfner +2 more
doaj +1 more source