However, the sieve is dotted with millions of holes precisely placed on silicon in a circular pattern that takes the place of conventional Fresnel zones
As is well known, the use of reflectors or lenses based on diffractive Fresnel zones
introduces a loss of gain and bandwidth when compared with parabolic reflectors.
Modeling of Transmission Circular Binary Fresnel Zone
For example, if both the jammer and the desired transmitter are beyond the Fresnel zone
, the J/S equation is as follows:
This area, known as the Fresnel Zone
, must be kept clear of all obstructions (see figure).
The length of the Fresnel zone
from a uniform aperture of width D is [2D.
The essence of the near shadowing phenomenon  is that the line of sight (LOS) or the first Fresnel zone
between transmitter (Tx) and receiver (Rx) is (partially) blocked by the user itself.
Focus X-rays in this system must be carried out using diffractive optical X called Fresnel Zone
As shown in Figure 3, the determination as to which propagation model to use can be made by calculating the Fresnel Zone
An algorithm is presented for assembling tiles into a variable spaced grating, the one-dimensional analog of a Fresnel zone
The Fresnel zone
plate is a planar device that produces lens-like focusing and imaging of electromagnetic waves.
When the large-size vehicle is in front of the transmitter (Tx), the signal power of receiver (Rx) suffers strong attenuation because the first Fresnel zone
is blocked by the vehicle itself to some extent .