منابع مشابه
K/Ka-band Channel Characterization for Mobile Satellite Systems
Mobile satellite systems allow truly ubiquitous wireless communications to users anywhere and anytime, NASA’s Advanced Communications Technology Satellite (ACTS) provides an ideal spacebased platform for the measurement of K/Ka-band propagation characteristics in a land mobile satellite application. Field tests for K-band propagation were conducted in three basic environments: clear line-ofsigh...
متن کاملKa - Band Linearization
The new Ka-band communications services require highly linear, high power amplifiers (HPAs). Traveling wave tube amplifiers (TWTAs) offer the best millimeter wave HPA performance in terms of power and efficiency, but are inferior to solid state power amplifiers (SSPAs) in linearity. This paper discusses techniques for improving millimeter wave HPA linearity. The significance and methods for eva...
متن کاملKa Band Transmit Antenna Array
Active antenna arrays working at higher frequencies result in higher packaging densities. The antenna array under consideration operates at about 30 GHz and will be installed in an aircraft. Commercially available power amplifiers at these frequencies have an efficiency of typically 20 %, which results in high amounts of dissipated heat for the required high radiated power. The dissipated power...
متن کاملTypical Ka band Satellite Beacon Receiver Design for Propagation Experimentation
This paper presents the design and simulation of a typical Ka band satellite beacon receiver for propagation experimentation. Using satellite beacon signal as a reference signal in satellite wave propagation study, is one of the most important methods. Satellite beacons are frequently available for pointing large antennas, but such signals can be used for measuring the effect of natural phenome...
متن کاملDesign and Development of Ka Band Digital Beacon Receiver for Ka Band Propagation Studies Experiment
India is planning to conduct its own Ka band propagation studies experiment in order to validate the existing ITU model and to develop a more accurate prediction model for its unique climate condition for guaranteed QoS. This experiment involves measurement of signal attenuation due to rain and development of appropriate mathematical propagation models. This requires a ground receiver to receiv...
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ژورنال
عنوان ژورنال: Physical Review Special Topics - Accelerators and Beams
سال: 2007
ISSN: 1098-4402
DOI: 10.1103/physrevstab.10.082001