РАДІОРЕЛЕЙНА СТАНЦІЯ V–ДІАПАЗОНУ “КАССІОПЕЯ”

Abstract

The paper briefly reviews the results of an analytical review of the state of development of technical means for creating communication lines of the millimeter (mm) range of the electromagnetic spectrum: 59–64 GHz (V–band), 71–76 GHz and 81–86 GHz  (E–band). The results of the analytical review of the state of development of technical means for the creation of communication lines of this range and the calculation of the energy potential of the radio line are presented. The optimal variant of construction of perspective radio relay station (RRS) of mm range is substantiated. The functional scheme and appearance of an experimental full-duplex sample of V–band RRS with separate antennas for transmitting (offset) and receiving (horn) paths with different gain (in total about 60 dBi) are given. The radiation power of the transmitting path of the experimental sample RRS was 20 dBm, BPSK modulation was used to transmit information signals, no additional measures were taken to ensure the separation between the receiving and transmitting paths. The Q–Flex modem from Teledyne Paradise Datacom LLC, USA was used as a digital modem with the function of automatic error correction by turbo coding methods. In field trials of the experimental radio of special communication, the speed of information transmission was 10 Mbit per second (determined by the capabilities of the digital modem used) in the communication interval of 1.75 km. It is concluded that the use of special communication radio lines at the intervals of the "first (last) mile" in the V–range, given the difficulty of creating artificial interference to their operation due to the effect of anomalous attenuation of radio waves due to resonant absorption of atmospheric atomic oxygen.