Results 41 to 50 of about 68,631 (303)

Pattern-Reconfigurable Cylindrical Dielectric Resonator Antenna Based on Parasitic Elements

open access: yesIEEE Access, 2017
A novel pattern-reconfigurable cylindrical dielectric resonator antenna is presented. By the incorporation of four p-i-n diode switches and four parasitic elements, the mode of dielectric resonator excited by the probe changed.
Bei-Jia Liu   +3 more
doaj   +1 more source

Design of a Metal 3D Printed Double-Ridged Horn Antenna With Stable Gain and Symmetric Radiation Pattern Over a Wide Frequency Range

open access: yesIEEE Access, 2023
In this paper, we propose a metal 3D printed double-ridged horn antenna with a truncated cone feeding structure, curve-shaped cavity, and mode suppressor for a feeder of a reflector antenna.
Namkang Lee   +3 more
doaj   +1 more source

Space Leakage of Power from the Slotline [PDF]

open access: yes, 2001
In this paper we present the comprehensive dispersion characteristics of the slotline on thin and low permittivity substrate with a wide slotwidth comprising the bound and space leaky waves with even and odd electric field symmetry.
Lorenz, Petr   +2 more
core   +1 more source

Mass spectrometry based identification of AMP‐O‐Tris generated by Thermococcus onnurineus Cas10

open access: yesFEBS Open Bio, EarlyView.
Isolated Thermococcus onnurineus Cas10 generates the noncanonical ATP‐derived product AMP‐O‐Tris while in Tris‐containing buffer as identified via mass spectrometry, revealing relaxed nucleophile selectivity under isolated conditions. These findings suggest that multiprotein Csm complex assembly restricts Cas10 reactivity toward canonical cyclic ...
Su‐Jin Lee   +6 more
wiley   +1 more source

A Small UWB Antenna with Dual Band-Notched Characteristics

open access: yesInternational Journal of Antennas and Propagation, 2012
A small novel ultrawideband (UWB) antenna with dual band-notched functions is proposed. The dual band rejection is achieved by etching two C-shaped slots on the radiation patch with limited area.
J. Xu   +5 more
doaj   +1 more source

Synthesis of flat‐top beampatterns based on simple polynomial transforms of Gaussian excitations

open access: yesIET Microwaves, Antennas & Propagation, 2023
In the design of antenna arrays which require fast and robust flat‐top beam synthesis, computationally efficient methods are preferred. This feature is usually met by analytical techniques or simple optimisation procedures. On the other hand, in the flat‐
Goran Molnar   +2 more
doaj   +1 more source

Hyperactive ice‐binding proteins stabilize cell membranes and improve resistance to dehydration stress in Caenorhabditis elegans

open access: yesFEBS Open Bio, EarlyView.
TisIBP8, a fungal‐derived hyperactive ice‐binding protein, helps Caenorhabditis elegans survive dehydration. It localizes near cell membranes, reduces cell damage, and helps maintain membrane structure during drying. These results suggest that ice‐binding proteins can protect cells from dehydration stress as well as freezing stress.
Daiki Shimose   +9 more
wiley   +1 more source

Radiation from a Millimeter-Wave Rectangular Waveguide Slot Array Antenna Enclosed by a Von Karman Radome [PDF]

open access: yesJournal of the Korean Institute of Electromagnetic Engineering and Science, 2018
In this paper, electromagnetic radiation from a slot array antenna enclosed by a Von Karman radome is analyzed by using the ray tracing method and Huygens’s principle. We consider the rectangular slot array antenna and the Von Karman radome.
Jihyung Kim   +3 more
doaj   +1 more source

Monopole Antenna with Enhanced Bandwidth and Stable Radiation Patterns Using Metasurface and Cross-Ground Structure

open access: yesSensors, 2022
In this paper, a printed monopole antenna with stable omnidirectional radiation patterns is presented for applications in ocean buoy and the marine Internet of Things (IoT).
Patrick Danuor   +2 more
doaj   +1 more source

Orbiting multi-beam microwave radiometer for soil moisture remote sensing [PDF]

open access: yes, 1985
The effects of soil moisture and other factors on soil surface emissivity are reviewed and design concepts for a multibeam microwave radiometer with a 15 m antenna are described. Characteristic antenna gain and radiation patterns are shown and losses due
Lawrence, R. W., Shiue, J. C.
core   +1 more source

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