نتایج جستجو برای: ku band
تعداد نتایج: 138127 فیلتر نتایج به سال:
Methods and results Prick-prick carried out with flaxseed showed a strong positivity. Skin prick test to inhaled allergens were positive to mites, dog and cat danders, plain tree and grasses. Skin prick test to food allergens were positive to almond, hazelnut, peanut, chestnut, walnut, mustard, lentils, soybeans, rice, oat, corn and lupine. Total IgE was: 291 UI/ml. Specific IgE (CAP, ThermoFis...
This paper presents a Ku-band (14–16 GHz) CMOS frequency-modulated continuous-wave (FMCW) radar transceiver developed to measure dry-snow depth for water management purposes and to aid in retrieval of snow water equivalent. An on-chip direct digital frequency synthesizer and digital-toanalog converter digitally generates a chirping waveform which then drives a ring oscillator-based Ku-Band phas...
Active microwave sensors, especially high-frequency radar systems, are highly sensitive to snow pack parameters, including Snow Water Equivalent (SWE), which is a crucial parameter in the studies of hydrology and climatology. For example, studies using Ku-band observations from scatterometer QuickSCAT and POLSCAT have shown significant radar backscattering responses on SWE variations. It has be...
Global Precipitation Measurement (GPM) is poised to be the next generation precipitation observations from space after the TRMM mission. The GPM will carry a dual-frequency precipitation radar (DPR), operating at Ku and Ka band frequencies. Since space-borne precipitation observations have never been done in Ka band before, extensive research work on dualfrequency radar, including electromagnet...
The design and analysis of ellipse shaped broad band micro strip patch antenna are discussed in this paper. In modern wireless communication system at the higher frequency, this basically needs all its components to be in compact size. The proposed antenna inspired by ellipse shaped which offer the better performance compare to the conventional antenna. Here, the proposed antenna is one such co...
Taking into account the needs for improved, spatially detailed observations of snow and ice in climate research, hydrology, and glaciology, the satellite mission COld REgions Hydrology High-resolution Observatory, CoRe-H2O, was proposed to ESA. As payload a coand cross-polarized Ku-band (17.2 GHz) and X-band (9.6 GHz) SAR was selected, because of its sensitivity to dry snow, thin sea ice, and t...
Progressive phase distribution is an important consideration in reflectarray antenna design which is required to form a planar wave in front of the reflectarray aperture. This paper presents a detailed mathematical model in order to determine the required reflection phase values from individual element of a reflectarray designed in Ku-band frequency range. The proposed technique of obtaining re...
Thanks to the facilities offered by telecommunications, telemedicine today allows physicians and clinicians to access, monitor and diagnose patients remotely. Telemedicine includes several applications such as remote monitoring of chronically ill patients, monitoring people in their everyday lives to provide early detection and intervention for various types of diseases, computer-assisted physi...
Ka-band offers the promise of very low-cost broadband terminals deployed in quantities an order of magnitude greater than the total number of all the two-way Cand Ku-band terminals installed since the birth of satellite communications. For small terminals, installation and commissioning costs can easily overwhelm equipment cost unless the terminal is pre-qualified for interference-limiting perf...
The India–France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applica...
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