Results 11 to 20 of about 56,467 (257)

Gravitational collapse of null radiation and a string fluid [PDF]

open access: yesPhysical Review D, 2003
RevTeX 4.0 (8 pages - no figures). submitted to Phys Rev D.
Govinder, K S, Govender, M
openaire   +2 more sources

A Wideband Filtering Dielectric Patch Antenna With Reconfigurable Bandwidth Using Dual-Slot Feeding Scheme

open access: yesIEEE Access, 2021
A wideband filtering dielectric patch (DP) antenna with reconfigurable bandwidth is investigated in this paper. Adjusting the aspect ratio of the DP resonator can make the high-order TE121 mode close to the dominate TM101 mode to facilitate the design of
Xiao-Ke Zhang   +4 more
doaj   +1 more source

Extreme Electron Acceleration with Fixed Radiation Energy

open access: yesEntropy, 2022
We examine the extreme situation of radiation from an electron that is asymptotically accelerated to the speed of light, resulting in finite emission energy.
Michael R. R. Good   +2 more
doaj   +1 more source

Removing broadside null of symmetric long‐slot antennas by using a coating layer

open access: yesIET Microwaves, Antennas & Propagation, 2021
This study presents a new concept in the design of symmetric long‐slot leaky‐wave antennas. Theoretically, a radiation null in the broadside direction of these antennas exists.
Mohaddeseh Shahrbandian   +1 more
doaj   +1 more source

Mechanism of the X-ray and Soft Gamma-ray Emissions from the High Magnetic Field Pulsar: PSR B1509-58 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
We use the outer gap model to explain the spectrum and the energy dependent light curves of the X-ray and soft γ-ray radiations of the spin-down powered pulsar PSR B1509-58.
Yu Wang, Jumpei Takata, Kwong Sang Cheng
doaj   +1 more source

Design of a Cylindrical Crossed Dipole Phased Array Antenna for Weather Surveillance Radars

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
We present a cylindrical dual-polarization phased array antenna for weather surveillance radars that features high isolation, matched copolar beams, low sidelobe levels, and adaptive null steering.
Mohammad-Hossein Golbon-Haghighi   +3 more
doaj   +1 more source

Substrate Integrated Waveguide Filtenna With Two Controllable Radiation Nulls [PDF]

open access: yesIEEE Access, 2020
In this paper, a novel substrate integrated waveguide (SIW) filtenna with two controllable radiation nulls is proposed, which has the advantage of good radiation characteristics. Radiation nulls are generated by electric and magnetic mixed coupling structure and fundamental mode, respectively.
Chuanyun Wang   +4 more
openaire   +2 more sources

A Broadband Filtering Patch Antenna Using T-Probe, Transverse Stubs, and U-Slots

open access: yesIEEE Access, 2019
This paper presents a broadband filtering patch antenna. This antenna consists of a rectangular patch, a rectangular ground plane, and an upright substrate.
Weimin Wang   +3 more
doaj   +1 more source

Metabolomic Analysis Reveals Unique Biochemical Signatures Associated with Protection from Radiation Induced Lung Injury by Lack of cd47 Receptor Gene Expression

open access: yesMetabolites, 2019
The goal of this study was to interrogate biochemical profiles manifested in mouse lung tissue originating from wild type (WT) and cd47 null mice with the aim of revealing the in vivo role of CD47 in the metabolic response to ionizing radiation ...
Elizabeth R. Stirling   +3 more
doaj   +1 more source

Methods for null control and their effects on the radiation pattern [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 1986
Several methods for synthesis of array antenna patterns with prescribed nulls are reviewed. Methods based on full amplitude/phase control at each array element and methods with a restricted number of degrees of freedom are compared, with attention focused on the characteristic features of the resultant patterns.
Steyskal, H., Shore, R., Haupt, R.
openaire   +2 more sources

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