Results 61 to 70 of about 55,571 (304)
International Journal of Antennas and Propagation, 2016 A broadband dual circularly polarized magnetoelectric dipole antenna (MEDA) fed by a miniaturized six-branch hybrid coupler (SBHC) is presented in this paper.
Changhong Zhang +3 more
doaj +1 more source
Dual-Polarized Backscatter Features of Surface Currents in the Open Ocean during Typhoon Lan (2017)
Remote Sensing, 2018 Ocean surface current measurements from satellites have historically been limited. We propose a new approach to detect ocean surface currents as observed by dual-polarized (VV and VH) spaceborne synthetic aperture radar (SAR).
Guosheng Zhang, William Perrie
doaj +1 more source
Applied Sciences, 2022 A gap waveguide (GW)-based 4 × 4 dual-band, dual-circularly polarized antenna array is proposed. The antenna is composed of two stacked layers which are responsible for right-handed circularly polarized (RHCP) radiation in K-band and left-handed ...
Sifan Wu +5 more
doaj +1 more source
Dual polarization fiber grating laser hydrophone
Optics Express, 2009 A novel fiber optic hydrophone based on the integration of a dual polarization fiber grating laser and an elastic diaphragm is proposed and experimentally demonstrated. The diaphragm transforms the acoustic pressure into transversal force acting on the laser cavity which changes the fiber birefringence and therefore the beat frequency between the two ...
Guan, BO, Tan, YN, Tam, HY
openaire +3 more sources
Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
High Efficiency Dual-Band Dual-Circularly Polarized Transmitarray Antenna
MicromachinesA dual-band dual-circularly polarized transmitarray antenna (TA) operating in the 28/39 GHz millimeter-wave band is proposed in this article. The TA unit consists of two parts: a broadband linearly polarized (LP) receiving part and a dual-band dual ...
Tianling Zhang +5 more
doaj +1 more source
A Dual-polarized Broadband Planar Antenna and Channelizing Filter Bank for Millimeter Wavelengths
, 2013 We describe the design, fabrication, and testing of a broadband log-periodic antenna coupled to multiple cryogenic bolometers. This detector architecture, optimized here for astrophysical observations, simultaneously receives two linear polarizations ...
Ade, Peter +11 more
core +1 more source
The phase-switched screen [PDF]
, 2004 Conventional (passive) radar-absorbent materials operate either by phase cancellation or by absorbing incident electromagnetic energy and converting it into heat. This paper examines a new type of active "absorber," called the phase-switched screen (PSS).
Chambers, B., Tennant, A.
core +1 more source
Advanced Engineering Materials, EarlyView.Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin +5 more
wiley +1 more source
Circular Dichroism and Cross Polarization Conversion Using Chiral Metasurface
IEEE Open Journal of Antennas and PropagationThis paper presents a novel dual-mode chiral metasurface (CM) designed to achieve strong circular dichroism (CD) in both transmission and reflection mode within the Ku-band.
Muhammad Noman +6 more
doaj +1 more source