Tunable time-reversal cavity for high-pressure ultrasonic pulses generation: A tradeoff between transmission and time compression
نویسندگان
چکیده
منابع مشابه
Ultrasonic Time Reversal Mirrors
For more than ten years, time reversal techniques have been developed in many different fields of applications including detection of defects in solids, underwater acoustics, room acoustics and also ultrasound medical imaging and therapy. The essential property that makes time reversed acoustics possible is that the underlying physical process of wave propagation would be unchanged if time were...
متن کاملMiso Time Reversal and Time Compression
This paper illustrates that the application of the time reversal technique in multiple inputsingle output (MISO) communications systems can effectively limit the perceived delay spread of the channel. Fixed wireless access channels in the 5GHz band have been measured with 8 element uniform linear antenna arrays at both ends, thus providing an 8x8 MIMO configuration. The measurements were perfor...
متن کاملIterative time reversal with tunable convergence
Introduction: Spatiotemporal focusing of waves has applications in fields such as imaging and communication. Time reversal (TR) mirrors have been used to focus waves in both space and time [1]. An ideal TR mirror consists of a wave source located inside a lossless medium that is completely enclosed by a surface of transceivers, which record and absorb the signal initially broadcast by the sourc...
متن کاملTime reversal in photoacoustic tomography and levitation in a cavity
A class of photoacoustic acquisition geometries in n is considered such that the spherical mean transform admits an exact filtered back projection reconstruction formula. The reconstruction is interpreted as a time reversion mirror that reproduces exactly an arbitrary source distribution in the cavity. A series of examples of non-uniqueness of the inverse potential problem is constructed based ...
متن کاملGeneration of Tunable THz Pulses
Many phenomena in materials science, physics, chemistry, biology and medicine involve fundamental processes with a spectral signature in the THz range [20]. However, for many years, these processes have been little studied due to the lack of high quality THz sources. Fortunately, the recent developments in THz technology have filled this so-called THz gap [28]. With the emergence of reliable TH...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2012
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.4742930