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Everything about Directivity
Measure of how much of an antenna's signal is transmitted in one direction
In electromagnetics, directivity is a parameter of an antenna or optical system which measures the degree to which the radiation emitted is concentrated in a single direction. It is the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions. Therefore, the directivity of a hypothetical isotropic radiator, a source of electromagnetic waves which radiates the same power in all directions, is 1, or 0 dBi. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: DirectivityA 5-minute orientation
- Skim a recent paper: Fundamental Approaches to Robust Differential Beamforming With High Directivity FactorsInfluential work since 2022
- Pick up a classic book: Double DownThe most-reprinted book on the subject
- Read the landmark paper: Modification of Empirical Strong Ground Motion Attenuation Relations to Include the Amplitude and Duration Effects of Rupture DirectivityCited 1,183 times
- Go sideways: Kernel function for solving integral equation of surface radiation exchangesA closely related topic
- Go sideways: Two-ray ground-reflection modelA closely related topic
📖 Definitions
Noun A measure of the performance of an antenna compared to an isotropic antenna; the ratio of the maximum value of radiation intensity to the average radiation intensity.
Noun Anisotropy in the propagation of earthquake waves in the direction of rupture.
Noun Directionality
🏆 Landmark papers (most cited)
Modification of Empirical Strong Ground Motion Attenuation Relations to Include the Amplitude and Duration Effects of Rupture Directivity
Characterization of forward-directivity ground motions in the near-fault region
Effects of Fling Step and Forward Directivity on Seismic Response of Buildings
Magnitude scaling of the near fault rupture directivity pulse
An Empirically Calibrated Framework for Including the Effects of Near-Fault Directivity in Probabilistic Seismic Hazard Analysis
Directivity and apparent velocity of the coseismic ionospheric disturbances observed with a dense GPS array
Blockage and directivity in 60 GHz wireless personal area networks: from cross-layer model to multihop MAC design
The effect of near‐fault directivity on building seismic collapse risk
🆕 Influential since 2022
Fundamental Approaches to Robust Differential Beamforming With High Directivity Factors
Array Signal Processing on Distributed Acoustic Sensing Data: Directivity Effects in Slowness Space
Simple and High-Sensitivity Dielectric Constant Measurement Using a High-Directivity Microstrip Coupled-Line Directional Coupler
Machine learning-based technique for directivity prediction of a compact and highly efficient 4-port MIMO antenna for 5G millimeter wave applications
A Novel Method for Maximum Directivity Synthesis of Irregular Phased Arrays
📚 Books worth reading
Double DownJeff Kinney · 2007
Who's Afraid of Virginia Woolf?Edward Albee · 1962
Human resource managementR. Wayne Mondy, Robert M. Noe · 1990
Basic Conducting TechniquesJoseph A. Labuta, Joseph A Labuta · 1982
Principle-Centered LeadershipStephen R. Covey · 1989
The cinema as artRalph Stephenson, Jean R. Debrix · 1965
Theatrical design and productionJ. Michael Gillette · 1987
The one minute managerKenneth H. Blanchard, Spencer Johnson · 1981
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
- Kernel function for solving integral equation of surface radiation exchanges In physics and engineering, the radiative heat transfer from one surface to another is the equal to the difference of incoming and outgoing radiation from…
- Two-ray ground-reflection model The two-rays ground-reflection model is a multipath radio propagation model which predicts the path losses between a transmitting antenna and a receiving…
- Radiation pattern An antenna radiation pattern (or antenna pattern or far-field pattern) is the directional (angular) dependence of the field strength (sometimes also the…
- Aperture (antenna) In electromagnetics and antenna theory, the aperture of an antenna is defined as "A surface, near or on an antenna, on which it is convenient to make assumption…
- Wrapped exponential distribution In probability theory and directional statistics, a wrapped exponential distribution is a wrapped probability distribution that results from the "wrapping"…
- Gegenbauer polynomials In mathematics, Gegenbauer polynomials or ultraspherical polynomials C(α) n(x) are orthogonal polynomials on the interval [−1,1] with respect to the weight…
- Wrapped asymmetric Laplace distribution In probability theory and directional statistics, a wrapped asymmetric Laplace distribution is a wrapped probability distribution that results from the…
- Grating lobes For discrete aperture antennas (such as phased arrays) in which the element spacing is greater than a half wavelength, a spatial aliasing effect allows…