Development of Wireless Communication Systems in the Subterahertz Frequency Range
- 9 Downloads
The subterahertz and terahertz frequency ranges are promising for the creation of high-speed wireless communication systems because of the possibility to achieve a bandwidth of about several dozen gigahertz, which ensures a high channel capacity. However, rapid attenuation of a signal during its propagation in the atmosphere complicates the operation of communication systems in these ranges. The use of fixed narrow-beam antennas with a high power gain provides a direct surface communication distance of up to a few kilometers. The communication distance limitation can be partially removed by decreasing the frequency down to 200 GHz and narrowing the channel bandwidth down to a few gigahertz. In this paper, we present a radically new approach that was developed to create a wideband (up to one gigahertz) communication channel based on rapid modulation of a centimeter wavelength signal followed by the carrier-frequency multiplication up to 230 GHz without the modulating-signal distortion. This approach was not used in the previous communication systems. The model of a transmit–receive system (200–220 GHz) based on modern semiconductor devices is described in detail. The possibility of digital signal transmission at a speed of up to 1 Gbit/s is experimentally shown. According to calculations, an output power of the transmitter about several hundreds of microwatt is enough for data transmission to a distance of up to 1.5 km with an antenna gain of no less than 50 dB.
Unable to display preview. Download preview PDF.
- 1.V. Vishnevsky, S. Frolova, and I. Shakhnovich, Elektron. Nauka, Tekhn. Biznes, No. 1, 90 (2011).Google Scholar
- 2.I. Kallfass, J. Antes, T. Schneider, et al., IEEE Trans. Terahertz Sci. Technol ., 1, No. 2, 477 (2011).Google Scholar
- 4.A. Hirata, T. Kosugi, H. Takahashi, et al., in: IEEE Int. Wireless Inform. Technol. Syst. Conf. 28 August–3 September 2010, Honolulu, 5611945.Google Scholar
- 6.I.P. Zaikin, A.V.Totsky, and S.K.Abramov, Designing the Antenna Devices of Radio-Relay Communication Lines [in Russian], Kharkov Aircraft Institute of the National Aerospace University, Kharkov (2006).Google Scholar