Applying this technique, he was able to visualise numerous optical principles, including refraction, diffraction, and phase delay
In another implementation, we use modulated light and measure the phase delay
of returning light.
"This phase delay
is biologically driven in adolescents," Ji said.
Two kinds of delays, group delay and phase delay
, were calculated from the phase spectra in this study.
Let the atmospheric phase delay
in layer H be [PHI](x).
Compared with the propagation in complete air medium with the same length, there exists substantial phase delay
as sound waves travel through the subunit, which shows promise for the altering of reflected phase in space.
Hence, special attentions have been paid to design various broadband and multiband RA antennas, such as using stacked patches with variable-length phase delay
lines, aperture-coupled patches, and multilayer patch elements [6-9].
However, it can not compensate the phase delay
of controlled object.
In order to eliminate this drawback, new sensor less algorithms are proposed and this will introduce some phase delay
due to the presence of low pass filters (LPF).
where [[phi].sub.src,i] is the phase of the source output signal; [[theta].sub.src,ref] is the phase delay
between the reference output from the source and the reference input of the delay generator, which is constant; [[theta].sub.dg] is the phase delay
between the pulse output of the delay generator and the pulse selector (its purpose is described in more detail in Sec.