2.A range of radio frequencies assigned by a regulatory agency for use by a given group or organization. 3. a.A range of values of a quantity or set of related quantities:the income spectrum. b.A sequence or range of related qualities, ideas, activities, entities, or phenomena:the whole...
< / p & gt; & lt; p & gt; application: generators of radioelectric waves of power to a few tens of gigahertz, especially to radars. < / p>JIYORUJIYU MURIE
11.Enter frequency range, and then connect constraint to constrained role(s).输入频率范围,然后将约束连接到被约束的角色。 12.picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources.从外陆来源的无线电频率范围内接受电磁射线。 13.extension of ultra high frequency...
notice some inconsistencies in the table above. For example, the 17-meter ham radio band is actually higher in frequency than the 16-meter broadcasting band. These inconsistencies have come about from years of use (misuse?) of a particular "meter band" to refer to a certain range of ...
Radar range equation Detection of objects using radar involves sophisticated signal processing. For a single pulse the following signal to noise ratio is: Observe that the received power drops with the fourth power of the range, so radar systems must cope with very large dynamic ranges in the re...
radio frequency n.Abbr.RF 1.The frequency of the waves transmitted by a specific radio station. 2.A frequency within the range at which radio waves are transmitted, conventionally from 3 hertz to 300 megahertz, immediately below the range of microwave frequencies in the electromagnetic spectrum. ...
Radio frequency (RF) is a frequency or rate of oscillation within the range of about 3 Hz to 300 GHz. This range corresponds to frequency of alternating current electrical signals used to produce and detect radio waves. Since most of this range is beyond the vibration rate that most ...
THE recent discovery of solar radio noise, in the range 30-1,000 megacycles, raises the question whether lower frequencies may not also exist. Variable magnetic fields exist on the sun and probably in the stars as well. Small and rapid pulsations of spot fields may well occur, even though...
Radio frequency is measured in units calledhertz(Hz), which represent the number of cycles per second when a radio wave is transmitted. One hertz equals one cycle per second; radio waves range from thousands (kilohertz) to millions (megahertz) to billions (gigahertz) of cycles per second. In...