Significant research and development in this area have transformed the inexpensive, miniaturized technology of RFIDs without chip inside. Chipless Radio Frequency IDentification (CRFID) is a striking wireless technology based on radar principle to sense, identify and track th...
electromagnetic spectrum词源英文解释 The first known use of electromagnetic spectrum was in 1924 electromagnetic spectrum儿童词典英英释义 electromagnetic spectrumnoun the entire range of wavelengths or frequencies of electromagnetic waves extending from gamma rays to the longest radio waves and including vis...
known as radiofrequency radiation, which is a kind of non-ionizing radiation ontheelectromagneticradiationspectrum. legco.gov.hk legco.gov.hk 衞生福利及食物局局長:主席女士,與流動電話轉發站有關的輻射統稱為射 頻輻射(radiofrequency),屬於電磁波(electromagneticwave)頻譜中的一種非電離輻射(non-ionizing ...
Radio wave: Wave from the portion of theelectromagnetic spectrumat lower frequencies than microwaves. 无线电波: 电磁波谱中比红外辐射频率更低的电波部分. 互联网 Spread spectrum technology competes in the unregulated portion of the radioelectromagnetic spectrum. ...
Electromagnetic spectrum: a chart showing the relative position of all electromagnetic radiation by their wavelength.(电磁光谱:各个辐射能的有关波长位置图表。) Visible light is part of the electromagnetic spectrum and 10,000 times bigger than the radio spectrum, affording potentially unlimited capacity....
Electromagnetic spectrum, the entire distribution of electromagnetic radiation according to frequency or wavelength.
Electromagnetic radiation - Radio Waves, Frequency, Wavelength: Radio waves are used for wireless transmission of sound messages, or information, for communication, as well as for maritime and aircraft navigation. The information is imposed on the electr
Radiofrequency electromagnetic radiation (RFR), a form of energy between 10 KHz-300 GHz in the electromagnetic spectrum, is used in wireless communication and emitted from antennae of mobile telephones (handys) and from cellular masts. RFR can penetrate into organic tissues and be absorbed and conv...
电磁波频谱如以下表格:Electromagnetic spectrumFrequency (Hz)PhotonenergyeV NameWavelength () Gamma ray < 0.02 nm > 15 EHz > 62.1 keV X-ray 0.01 nm – 10 nm 30 EHz – 30 PHz 124 keV – 124 eV Ultraviolet 10 nm – 400 nm 30 PHz – 750 THz 124 eV – 3 eV Visible light 390 nm –...
Figure 2. Spectrum of the radiofrequency electromagnetic field (RF-EMF) (30 kHz to 300 GHz) predominantly used for telecommunications applications (adapted from Kim et al. [13]). This frequency range causes biological and health effects that are classified as thermal and nonthermal. This classif...