Radio bands defined

Industrial, scientific, and medical bands are reserved portions of the radio spectrum, defined by the ITU Radio Regulations [23], that are employed in body-centric wireless communication applications and, more in general, for other industrial, medical, and scientific applications. The majority of textile antennas developed to date are intended for operation in some of those ISM bands, especially in the 2.45 GHz, by far the most popular for wearable antennas, and 5.8 GHz bands. The first band represents a good trade-off between antenna dimensions (inversely proportional to fiequency) and path loss (increasing with frequency), whereas the second is more convenient when... 

The rapid growth of satellite and mobile radio communications has led to a requirement for narrow band, frequency-stable filters and oscillators. Selectivity and stability are necessary to ensure that signals are confined to closely defined allotted frequency bands and to prevent the intrusion of unwanted signals which would interfere with the satisfactory performance of the system. Antennae are also critical components of any wireless communications system. The need for compactness in satellite and hand-held mobile systems is self-evident. 

Figure 3.2 The NMR spectrum of ethanol C2H5OH (lower diagram) in its liquid phase. The upper curve in the form of steps that appear at same S s as bands in the lower spectrum is the integrated spectrum, offset for clarity. S is the chemical shift in parts per million . The (not labelled) ordinate is the absorbed power of the radio wave that defines the NMR intensity. From Canet (42) with permission.

Mobile Telephone — A mobile communication device that falls under or uses any commercial mobile radio service as defined in 47 CFR 20.3. It does include two-way or Citizens Band (CB) Radio... 

A mobile telephone (cell phone) is defined in this case as a mobile commrmication device defined by the Federal Communications Commission (FCC) as a cellular phone. It does not include two-way or citizen band radios. However, it does include push-to-talk phones as these devices are classified as cell phones by the FCC and they require the driver to hold it while it is in operation. 

Figure 4 shows a block scheme of the experimental apparatus. The S-band signals were post-processed as recorded samples of the signal complex envelope. Real time processing in our software defined radio receiver (Kovaf, 2010) is in preparation. 

---