Betekenis van:
radio wave

radio wave
Zelfstandig naamwoord
    • an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m

    Synoniemen

    Hyperoniemen

    Hyponiemen


    Voorbeeldzinnen

    1. He listens to a short wave radio station.
    2. What Jansky had observed was the 14.6m wavelength radio wave from the Milky Way's core.
    3. Operating frequencies above 3 GHz; b. An average output power density exceeding 80 W/kg; and c. A volume of less than 400 cm3; Note: 3A001.b.8. does not control equipment designed or rated for operation in any frequency band which is "allocated by the ITU" for radio-communications services, but not for radio-determination. c. Acoustic wave devices, as follows, and specially designed components therefor: 1. Surface acoustic wave and surface skimming (shallow bulk) acoustic wave devices (i.e., "signal processing" devices employing elastic waves in materials), having any of the following: a. A carrier frequency exceeding 2,5 GHz;
    4. ‘RFID reader or writer’ or ‘reader’ means a fixed or mobile data capture and identification device using a radio frequency electromagnetic wave or reactive field coupling to stimulate and effect a modulated data response from a tag or group of tags;
    5. Digital integrated circuits, other than those described in 3A001.a.3. to 3A001.a.10. and 3A001.a.12., based upon any compound semiconductor and having any of the following: a. An equivalent gate count of more than 3000 (2 input gates); or b. A toggle frequency exceeding 1,2 GHz; 12. Fast Fourier Transform (FFT) processors having a rated execution time for an N-point complex FFT of less than (N log2N)/20480 ms, where N is the number of points; Technical Note: When N is equal to 1024 points, the formula in 3A001.a.12. gives an execution time of 500 μs. b. Microwave or millimetre wave components, as follows: 1. Electronic vacuum tubes and cathodes, as follows: Note 1: 3A001.b.1. does not control tubes designed or rated for operation in any frequency band which meets all of the following characteristics: a. Does not exceed 31,8 GHz; and b. Is "allocated by the ITU" for radio-communications services, but not for radio-determination. Note 2: 3A001.b.1. does not control non- "space-qualified" tubes which meet all of the following characteristics: a. An average output power equal to or less than 50 W; and b. Designed or rated for operation in any frequency band which meets all of the following characteristics: 1. Exceeds 31,8 GHz but does not exceed 43,5 GHz; and 2. Is "allocated by the ITU" for radio-communications services, but not for radio-determination. a. Travelling wave tubes, pulsed or continuous wave, as follows: 1. Operating at frequencies exceeding 31,8 GHz; 2. Having a cathode heater element with a turn on time to rated RF power of less than 3 seconds; 3. Coupled cavity tubes, or derivatives thereof, with a "fractional bandwidth" of more than 7 % or a peak power exceeding 2,5 kW; 4. Helix tubes, or derivatives thereof, with any of the following characteristics: a. An "instantaneous bandwidth" of more than one octave, and average power (expressed in kW) times frequency (expressed in GHz) of more than 0,5;