KravchukS. A. *, Bulgakov В. M. **, NarytnikT. N. **** Research Institute of Telecommunications, National Technical University of Ukraine ‘Kyiv Polytechnical Institute’

2   Industrialnyy Provulok, Kyiv, Ukraine, 03056 phone 2417723, 4411685 e-mail: sakrav@users. ntu-kpi. kiev. ua **A. Ya. Usikov Institute of Radiophysics and Electronics, NAS of Ukraine 12 Akademika Proskury St., Kharkiv, Ukraine, 61085 phone 448319 *** lnstitute of Electronics and Communications, UASNP 2-Б Prospekt 50-Letiya Oktyabrya, Kyiv, Ukraine, 03148 phone 4779430; 4783463, e-mail: iec@naverex.kiev. ua

Abstract The design of mm and submm-wave broadband telecommunications systems is outlined with regard to the features of the given wavebands and based on the quasi-optical approach to the development of new radio systems.

I.  Introduction

At present the lack of frequency bands for installing new and developing the existing radio systems is observed along all allocated frequency ranges (right up to cm band). Mastering new ranges would certainly provide more opportunities for the design of new radio systems; however, one should be aware that the mechanisms of radiopropagation at these new ranges differ from those at well-mastered ones and will require additional research.

In this connection the mastering of mm and submm ranges is becoming quite urgent, especially regarding the development of new radio telecommunications systems utilizing the fundamental advantages of these wavebands.

II.  Features of mm and submm bands

The practical value of mm and submm bands for telecommunications purposes is determined by their large information capacity. In fact, all the bands between kilometric and centimetric waves take up a frequency range of 30GHz, while millimeter and submillimeter bands cover about 3000GHz. Therefore, they are capable of transmitting 100 times more information in the same time period compared to other lower frequency bands. Moreover, the wide frequency range of these bands allows for high-quality transmission of high-speed information flows using robust broadband modulation techniques.

II.    Conclusion

Mm and submm radio systems allow for ecologically safe broadband telecommunications. These systems would be most promising for the applications requiring high transmission rates and short radiopaths. Developing such systems in enclosed spaces, tunnels and mines is of chief interest. A quasi-optical approach in the design of such mm and submm radio systems has a great potential.

Джерело: Матеріали Міжнародної Кримської конференції «СВЧ-техніка і телекомунікаційні технології», 2003р.