نتایج جستجو برای: microwave technique
تعداد نتایج: 658606 فیلتر نتایج به سال:
Microwave imaging for breast cancer detection is becoming a promising alternative technique to current imaging modalities. The significant contrast between dielectric properties of normal and malignant breast tissues makes microwave imaging a useful technique to provide important functional information for diagnoses. However, one of its limitations is that it intrinsically cannot produce high r...
Muscle blood flow was measured using a radioactive tracer technique in five normal subjects. Flow values obtained during application of 2450 MHz microwave therapy were compared with resting values and in each case the treatment produced a significant increase; the mean values being 2.9 ml/100g/min at rest and 11.4 ml/100g/min during application of the microwave therapy. Comparison is made with ...
Microwave engineering now a days plays a vital tool in diagnostic and therapeutic medicine. A quality evaluation of human semen at microwave frequencies using the measurements made at different intervals of time by cavity perturbation technique in the S-band of microwave spectrum is presented in this paper. Semen samples were also examined in the microscopic as well as macroscopic level in clin...
Microwave engineering now a days plays a vital tool in diagnostic and therapeutic medicine. A quality evaluation of human semen at microwave frequencies using the measurements made at different intervals of time by cavity perturbation technique in the Sband of microwave spectrum is presented in this paper. Semen samples were also examined in the microscopic as well as macroscopic level in clini...
We use a microwave field to control the quantum state of optical photons stored in a cold atomic cloud. The photons are stored in highly excited collective states (Rydberg polaritons) enabling both fast qubit rotations and control of photon-photon interactions. Through the collective read-out of these pseudospin rotations it is shown that the microwave field modifies the long-range interactions...
growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...
Microwave drying technology has the potential for large production time and energy cost savings versus traditional vacuum drying methods for active pharmaceutical ingredient (API) applications. One of the most critical parameters in the drying process is the determination of the end point, usually at a specified moisture content. On-line mass spectrometry (MS) was used as a tool to monitor micr...
A microwave technique for the measurement of average moisture content of stacked timber during kiln drying has been developed. This technique based upon a linear array of slots in a waveguide has been modelled and experimentally verified. The experimental trials using standard kiln drying schedules have shown the technique to be accurate to within 1%.
This paper reports the experimental demonstration of frequency upshifting of microwave radiation by a relativistic ionization front. Source radiation at 34.8 GHz has been upshifted to greater than 116 GHz in a continuously tunable fashion. It is a new technique for generating high-power, tunable radiation in short pulses, and has potential applications in plasma diagnostics, time-resolved micro...
We study the variation in the differential conductance G=dj /dV of a normal metal wire in a superconductor/ normal metal heterostructure with a cross geometry under external microwave radiation applied to the superconducting parts. Our theoretical treatment is based on the quasiclassical Green’s functions technique in the diffusive limit. Two limiting cases are considered: first, the limit of a...
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