Results 121 to 130 of about 632 (194)

Influence of Sample Position on Strain Monitoring in Composite Materials Using Magnetic Microwires. [PDF]

open access: yesSensors (Basel)
Garcia-Etxabe R   +4 more
europepmc   +1 more source

Radar for Europa Assessment and Sounding: Ocean to Near-Surface (REASON). [PDF]

open access: yesSpace Sci Rev
Blankenship DD   +108 more
europepmc   +1 more source

Surface properties of the seas of Titan as revealed by Cassini mission bistatic radar experiments. [PDF]

open access: yesNat Commun
Poggiali V   +11 more
europepmc   +1 more source

The elliptical Fresnel-zone plate antenna

open access: closedNinth International Conference on Antennas and Propagation (ICAP), 1995
The growing number of direct broadcast satellites (DBS) asks for simple, low-cost home receiving systems. The use of the Fresnel-zone plate antenna (FZPA), which is related to the optical lens, is also promising for this application. The aperture of the FZPA is plane and its structure is determined by the well-known Fresnel ellipsoids.
J.M. van Houten
  +5 more sources

Design procedure for a Fresnel-zone plate antenna

open access: closedInternational Journal of Infrared and Millimeter Waves, 1993
A design procedure for two types of Fresnel-zone plate antennas is presented: viz. antennas with absorbing/transparent zones and phase-correcting zones. Design objectives are the optimization of the gain of the lens of the antenna and the side-lobe envelope of its radiation pattern. The design rules are derived from numerical simulations.
L. C. J. Baggen, M.H.A.J. Herben
openalex   +3 more sources

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