06

utorak

rujan

2011

RADIO FREQUENCY AND MICROWAVE : RADIO FREQUENCY


Radio frequency and microwave : Frigidaire microwave installation.



Radio Frequency And Microwave





radio frequency and microwave






    radio frequency
  • an electromagnetic wave frequency between audio and infrared

  • Radio frequency (RF) is a rate of oscillation in the range of about 30 kHz to 300 GHz, which corresponds to the frequency of electrical signals normally used to produce and detect radio waves.

  • A frequency or band of frequencies in the range 104 to 1011 or 1012 Hz, suitable for use in telecommunications

  • (Radio frequencies (RF)) Periodic electrical signals transmitted through air or space.





    microwave
  • An electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation. Microwaves are used in radar, in communications, and for heating in microwave ovens and in various industrial processes

  • cook or heat in a microwave oven; "You can microwave the leftovers"

  • a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data

  • kitchen appliance that cooks food by passing an electromagnetic wave through it; heat results from the absorption of energy by the water molecules in the food











radio frequency and microwave - Radio Frequency




Radio Frequency and Microwave Power Measurement (IEE Electrical Measurement Series, 7)


Radio Frequency and Microwave Power Measurement (IEE Electrical Measurement Series, 7)



Includes: Introduction to calorimeters. Dry load calorimeters. Thermoelectric power meters. Diode power meters. Calibration and comparison techniques. Connectors and adapters. Instruments and techniques for pulsed power measurements. Voltage current measurements.
Also available:
Radio Frequency and Microwave Power Measurement - ISBN 0863411207
Ferrites at Microwave Frequencies - ISBN 0863410642
The Institution of Engineering and Technology is one of the world's leading professional societies for the engineering and technology community. The IET publishes more than 100 new titles every year; a rich mix of books, journals and magazines with a back catalogue of more than 350 books in 18 different subject areas including:
-Power & Energy
-Renewable Energy
-Radar, Sonar & Navigation
-Electromagnetics
-Electrical Measurement
-History of Technology
-Technology Management










83% (7)





Swiss Weather Anomaly #2 - 24.Apr.2009




Swiss Weather Anomaly #2 - 24.Apr.2009





On the morning of the 24th of April 2009 employees at MeteoSwiss (Switzerland's Federal Office of Meteorology and Climatology) got the surprise of their lives. Huge circular fields hovering over Switzerland were picked up by their radars. The question was asked as to whether a massive UFO was in the upper-atmosphere above the scenic mountainous nation or perhaps these circles were signs of an imminent hurricane or maybe some sort of electromagnetic radio frequency/microwave technology is in use to cause such an anomaly.

Felix Schacher, a senior Meteorologist at MeteoSwiss claimed the circles were not UFOs or the signs of a hurricane about to wreak havoc on his country. Mr Schacher told the Swiss news site '20 Minutes' that they were merely caused by the reflection of water droplets that just happened to form a circular shape.

A few minutes after being queried on the issue the radar images were hurriedly removed from the departments website. Many Swiss UFO researchers have left comments on various internet forums expressing their doubt on the 'reflection water droplets' story, asking why was the image so quickly removed and who ordered its removal.

Many people also left some comments on forums asking if the interference patterns shown on the meteorological map, could be caused by trials in relation to the startup of the LHC - Large Hadron Collider near Geneve also, in Switzerland.

Please, feel free to comment!!











AUTO/BOOTH (repainted)




AUTO/BOOTH (repainted)





Radio frequencies occupy the range from a few tens of hertz to three hundred gigahertz, although commercially important uses of radio use only a small part of this spectrum. Other types of electromagnetic radiation, with frequencies above the RF range, are microwave, infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.

A boy is a young male human (usually child or adolescent), as contrasted to its female counterpart, girl, or an adult male, a man.
The term "boy" is primarily used to indicate biological sex distinctions, cultural gender role distinctions or both. The latter most commonly applies to adult men, either considered in some way immature or inferior, in a position associated with aspects of boyhood, or even without such boyish connotation as age-indiscriminate synonym. The term can be joined with a variety of other words to form these gender-related labels as compound words.
Ongoing debates about the influences of nature versus nurture in shaping the behavior of girls and boys raises questions about whether the roles played by boys are mainly the result of inborn differences or of socialization. Images of boys in art, literature and popular culture often demonstrate assumptions about gender roles.









radio frequency and microwave








radio frequency and microwave




Foundations and Industrial Applications of Microwave and Radio Frequency Fields: Physical and Chemical Processes






Foundations and Industrial Applications of Microwaves and Radio Frequency Fields Physical and Chemical Processes G. Roussy Universite de Nancy 1, France J. A. Pearce University of Texas at Austin, USA This book presents microwave and radio frequency techniques from the point of view of industrial applications, with special attention to electromagnetic energy and material interaction at the microscopic level. Starting with a review of the complete set of macroscopic governing equations--including conduction processes--it then addresses microscopic interaction effects, describing many results from spectroscopic studies. Finally, industrial applications, including the emerging new field of microwave catalysis, are addressed. The technology presented is applied in the mineral, textile, paper, ceramic, chemical and last, but not least, the food industry.










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