Results 11 to 20 of about 359,797 (235)
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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The Direction Finding Ambiguity Analysis for 3 Element and 4 Element Phase Interferometer DF System
Journal of the Korea Institute of Military Science and Technology, 2014 ABSTRACT In this paper, we have proposed a novel method which can analysis the direction finding ambiguity analysis for array geometry in 3 channel and 4 channel multiple baseline direction finding system. Generally, the direction finding ambiguity in the 3 element and 4 element phase interferometer direction finding system is calculated by the ...
Jung-Hoon Lee, Jong-Myung Woo
openaire +2 more sources
Not only the butterflies: managing ants on road verges to benefit Phengaris (Maculinea) butterflies [PDF]
, 2010 Obligate myrmecophilic butterfly species, such as Phengaris (Maculinea) teleius and P. nausithous, have narrow habitat requirements. Living as a caterpillar in the nests of the ant species Myrmica scabrinodis and M.
Gestel, R., van +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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The enigma of facial asymmetry:is there a gender specific pattern of facedness? [PDF]
, 2005 Although facial symmetry correlates with facial attractiveness, human faces are often far from symmetrical with one side frequently being larger than the other (Kowner, 1998). Smith (2000) reported that male and female faces were asymmetrical in opposite
Carson, Derek +5 more
core +4 more sources
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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Strongly Monotone Drawings of Planar Graphs [PDF]
, 2016 A straight-line drawing of a graph is a monotone drawing if for each pair of vertices there is a path which is monotonically increasing in some direction, and it is called a strongly monotone drawing if the direction of monotonicity is given by the ...
Felsner, Stefan +5 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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