Browsing by Keywords "Attenuation"
Now showing items 1-5 of 5
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Characterization and imaging with lamb wave lens at gigahertz frequencies
(IEEE, 1994-10-11)Lamb wave lenses with conical refracting surfaces are fabricated for use at 400 MHz and 1 GHz. The conical surfaces are ground and polished with mechanical means and they are sufficiently smooth for the frequencies of ... -
Laser-micromachined millimeter-wave photonic band-gap cavity structures
(American Institute of Physics, 1995)We have used laser-micromachined alumina substrates to build a three-dimensional photonic band-gap crystal. The rod-based structure has a three-dimensional full photonic band gap between 90 and 100 GHz. The high resistivity ... -
Maximizing the signal-to-noise ratio of diverging ultrasonic waves in multiple scattering, attenuating, and diffracting media
(Bilkent University, 2022-09)Diverging wave imaging is an unfocused imaging method in which a diverging beam is transmitted to insonify the entire region of interest. This diverging beam is formed by applying appropriate time delays to each transducer ... -
Multipath fading effect on terrestrial microwave LOS radio links
(IEEE, 2015-07)In this paper, the calculation of both the total received power with the effect of the ground reflection and the fade margin to find out the link availability for terrestrial microwave LOS (line-of-sight) radio links is ...
