enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    Note the format of the parameter notation SXYab, where "S" stands for scattering parameter or S-parameter, "X" is the response mode (differential or common), "Y" is the stimulus mode (differential or common), "a" is the response (output) port and b is the stimulus (input) port. This is the typical nomenclature for scattering parameters.

  3. Dynamic light scattering - Wikipedia

    en.wikipedia.org/wiki/Dynamic_light_scattering

    Hypothetical dynamic light scattering of two samples: Larger particles on the top and smaller particles on the bottom. Dynamic light scattering (DLS) is a technique in physics that can be used to determine the size distribution profile of small particles in suspension or polymers in solution. [1]

  4. Network analyzer (electrical) - Wikipedia

    en.wikipedia.org/wiki/Network_analyzer_(electrical)

    A VNA is a test system that enables the RF performance of radio frequency and microwave devices to be characterised in terms of network scattering parameters, or S parameters. The diagram shows the essential parts of a typical 2-port vector network analyzer (VNA). The two ports of the device under test (DUT) are denoted port 1 (P1) and port 2 ...

  5. Perfectly matched layer - Wikipedia

    en.wikipedia.org/wiki/Perfectly_matched_layer

    Fortunately, there is a simple solution in a left-handed medium (for which all waves are backwards): merely flip the sign of σ. A complication, however, is that physical left-handed materials are dispersive: they are only left-handed within a certain frequency range, and therefore the σ coefficient must be made frequency-dependent.

  6. Scattering rate - Wikipedia

    en.wikipedia.org/wiki/Scattering_rate

    The scattering rate w(k) is determined by summing all the possible finite states k' of electron scattering from an initial state k to a final state k', ...

  7. Scattering - Wikipedia

    en.wikipedia.org/wiki/Scattering

    This object scatters part of the wave field, although at any individual point, the wave's frequency and wavelength remain intact. In mathematical physics, scattering theory is a framework for studying and understanding the interaction or scattering of solutions to partial differential equations.

  8. Cross section (physics) - Wikipedia

    en.wikipedia.org/wiki/Cross_section_(physics)

    The scattering of X-rays can also be described in terms of scattering cross sections, in which case the square ångström is a convenient unit: 1 Å 2 = 10 −20 m 2 = 10 000 pm 2 = 10 8 b. The sum of the scattering, photoelectric, and pair-production cross-sections (in barns) is charted as the "atomic attenuation coefficient" (narrow-beam), in ...

  9. Structure factor - Wikipedia

    en.wikipedia.org/wiki/Structure_factor

    Consider the scattering of a beam of wavelength by an assembly of particles or atoms stationary at positions , =, …,.Assume that the scattering is weak, so that the amplitude of the incident beam is constant throughout the sample volume (Born approximation), and absorption, refraction and multiple scattering can be neglected (kinematic diffraction).