Results 61 to 70 of about 847,419 (234)

A Novel High Suppression Multilayer Frequency‐Selective Surface Based on Hexagonal Grids

IET Microwaves, Antennas & Propagation
This paper addresses the issue of achieving excellent overall performance for frequency selective surface (FSS) radomes. A dual‐layer frequency selective surface based on a hexagonal structure is proposed, which offers broadband suppression, roll‐off ...
Boyang Wang, Xuewu Cui, Wei Yang, Lei Han, Suli Guo   +4 more
doaj   +1 more source

Radar echoes at 2.66 and 40.92 MHz from the mesosphere, part 2.6A [PDF]

During recent decades, the ionospheric D region has been scanned extensively by radar in the frequency range from 1 to 60 MHz. Progress has been made in understanding the reflection/scattering of radio waves in that area.
Royrvik, O.
core   +1 more source

MIMO Radar Ambiguity Properties and Optimization Using Frequency-Hopping Waveforms [PDF]

, 2008
The concept of multiple-input multiple-output (MIMO) radars has drawn considerable attention recently. Unlike the traditional single-input multiple-output (SIMO) radar which emits coherent waveforms to form a focused beam, the MIMO radar can transmit ...
Chen, Chun-Yang, Vaidyanathan, P. P.
core   +2 more sources

Radar Anti‐Jamming Performance Evaluation: A Novel Model Based on Measurement Error and RCS Distributions

IET Radar, Sonar & Navigation
The growing complexity of the electromagnetic environment makes accurate radar anti‐jamming performance evaluation essential for assessing the effectiveness of electronic countermeasure systems.
Linqi Zhao, Liang Yan, Xiaojun Duan, Zhengming Wang, Yike Xiao   +4 more
doaj   +1 more source

Phenomenological approach to scatterometer data interpretation [PDF]

A graphic method of analyzing radar scatterometer sea clutter data leading to linear relations between scattering cross sections and tan angle of incidence of the radiation is proposed.
Alzofon, F. E.
core   +1 more source

Observations of the daytime boundary layer in deep alpine valleys [PDF]

, 2006
Peer ...
Chemel, C., Chollet, J.P.
core   +3 more sources

User's manual for three dimensional FDTD version D code for scattering from frequency-dependent dielectric and magnetic materials [PDF]

The Penn State Finite Difference Time Domain Electromagnetic Scattering Code Version D is a three dimensional numerical electromagnetic scattering code based upon the Finite Difference Time Domain Technique (FDTD). The supplied version of the code is one
Beggs, John H., Kunz, Karl S., Luebbers, Raymond J.   +2 more
core   +4 more sources

Analysis of Current Distributions and Radar Cross Sections of Line Source Scattering from Impedance Strip by Fractional Derivative Method

Advanced Electromagnetics, 2019
In this paper, we have studied the analysis of current distributions and radar cross sections of line source scattering from impedance strip. The problem was solved with fractional derivative method previously.
K. Karacuha, E. I. Veliyev, V. Tabatadze, E. Karaçuha   +3 more
doaj   +1 more source

Surface processes on Venus [PDF]

Magellan synthetic aperture radar (SAR) and altimetry data were analyzed to determine the nature and extent of surface modification for venusian plains in the Sedna Planitia, Alpha Regio, and western Ovda Regio areas. Specific cross sections derived from
Arvidson, R. E.
core   +1 more source

The composite scattering model for radar sea return [PDF]

, 1972
A composite scattering model, suitable for explaining the behavior of measured scattering cross sections of the ocean surface, is presented. Furthermore, utilizing this scattering model, the spectrums of the small gravity, gravity-capillary, waves will ...
Krishen, K.
core   +1 more source