Results 21 to 30 of about 185,245 (299)
Optical Antennas for Enhanced Efficiency
Solar Energy: New Materials and Nanostructured Devices for High Efficiency, 2008 High efficiency solutions for photovoltaics requires taking advantage of IR photons energy. Possible solutions are based on up-conversion processes which have a low cross section. We will discuss different solutions to enhance the absorption.
Esteban, Ruben +2 more
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IEEE Access, 2020 We evaluated a 16-channel loop + dipole (LD) transceiver antenna array with improved specific absorption rate (SAR) efficiency for 10.5 Tesla (T) human head imaging applications.
Myung Kyun Woo +8 more
doaj +1 more source
Fundamental Limitations for Antenna Radiation Efficiency [PDF]
IEEE Transactions on Antennas and Propagation, 2018 Small volume, finite conductivity and high frequencies are major imperatives in the design of communications infrastructure. The radiation efficiency $η_r$ impacts on the optimal gain, quality factor, and bandwidth. The current efficiency limit applies to structures confined to a radian sphere $ka$ ($k$ is the wave number, $a$ is the radius).
Morteza Shahpari, David V. Thiel
openaire +3 more sources
A Low-Profile Hollow Waveguide Slot Array Antenna with Full-Corporate Feeding Network at K-Band
Advanced Electromagnetics, 2022 A hollow waveguide slot array antenna with a total of 338x106.5x28.9 mm3 is proposed as a sensor for radar applications at K-band. The proposed antenna consists of a radiating slot plate with 8x32 slots, a middle plate with 64 cavities and apertures ...
Y. E. Yamaç +3 more
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International Journal of Antennas and Propagation, 2022 In this paper, a low profile and high-efficiency decoupling antenna pair for multiunit smartphones is proposed using a similar π-shaped feed structure that can excite the dipole radiation mode of microstrip antenna.
Di Wu +4 more
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Robust, wearable, on-body antenna relying on half mode substrate integrated waveguide techniques [PDF]
, 2014 A compact, robust, wearable antenna for body-worn applications in the 2.4 GHz Industrial Medical and Scientific band is designed, fabricated and tested.
Agneessens, Sam +3 more
core +2 more sources
Design of Flexible and Dual Band Antenna for Vehicular Communication
International Transactions on Electrical Engineering and Computer Science, 2023 The antenna with bowtie and meander lines shaped elements for the vehicular communication in this paper. The dimensions of the proposed antenna are 40.5*91.5*0.1. The substrate used in this antenna is polyamide substrate with a permittivity of 4.3.
K Appala Raju +4 more
doaj
Efficiency Improvement of Vehicular Antenna Systems for Ubiquitous Intelligent Systems
Information, 2014 This paper describes the design of a high-efficiency vehicular roof-mounted antenna for wireless access for vehicular environment (WAVE) communication systems used for ubiquitous intelligent systems.
Kyubong Yeon, Duho Lee, Byeongwoo Kim
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H-Shaped Slot Antenna with Harmonic Tuning Function and Integrated Power Amplifier
Energies, 2023 This study proposes a patch antenna with an H-shaped slot with direct matching and harmonic tuning (rejection) functions for microwave power transfer. This antenna enables an integrated active antenna in which the power amplifier and antenna are directly
Yuto Narita +4 more
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Optimization of photomixers and antennas for continuous-wave terahertz emission [PDF]
, 2005 We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the
Baker, C. +7 more
core +1 more source