Results 41 to 50 of about 14,576 (298)
Directive Microstrip Antennas for Specific Below −2.45 GHz Applications
International Journal of Antennas and Propagation, 2012 Microstrip printed antennas are the preferred choice in high data ratio modern communications, mainly at 2.45 GHz and above. In this paper, we propose two different approaches of microstrip printed antennas for lower frequency usage.
E. Ávila-Navarro, C. Reig
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Sensors, 2022 Four novel substrate-integrated waveguide (SIW) antennas are proposed, in order to obtain K-band beam scanning through the coplanar meta-surfaces of properly devised complementary split-ring resonators.
Chunli Wang +3 more
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Measurement results of transmit delay diversity for DVB-T networks [PDF]
, 2008 This paper describes work carried out by Brunel University and Broadreach systems (UK) to quantify the advantages that can be achieved if transmit diversity is applied to systems employing the DVB standard.
Di Bari, R
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim +8 more
wiley +1 more source
Investigation into a Miniaturized Wideband Parasitic Array Antenna
Applied SciencesCompact antennas with broad bandwidth and high gain are essential for modern communication systems, where efficient performance and miniaturization are critical.
Lauryn Paige Smith, Yen Le, Sungkyun Lim
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Design of slant polariser for directional antennas and antenna arrays
IET Microwaves, Antennas & Propagation, 2019 In this study, a slant polariser design for directional antennas and antenna arrays is proposed. The polariser changes linear polarisation (vertical or horizontal polarisation) to slant (45°) polarisation of a directional antenna and arrays. The polariser consists of five layers that are formed by metallic strips with different angular orientations on ...
Surmeli, Koray, Kizilay, Ahmet
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Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
Optimizations of Patch Antenna Arrays Using Genetic Algorithms Supported by the Multilevel Fast Multipole Algorithm [PDF]
, 2014 We present optimizations of patch antenna arrays using genetic algorithms and highly accurate full-wave solutions of the corresponding radiation problems with the multilevel fast multipole algorithm (MLFMA).
Ergül, Özgür Salih, Onol, Can
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FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
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Antenna Array Design for Directional Modulation [PDF]
, 2020 Directional modulation (DM) has been applied to linear antenna arrays to increase security of signal transmission. However, only the azimuth angle is considered in the design, due to inherent limitation of the linear array structure, since linear antenna array lacks the ability to scan in the three dimensional (3-D) space.
Zhang, B., Liu, W., Wang, C.
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