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Telecommunications and Radio Engineering

Publication de 12  numéros par an

ISSN Imprimer: 0040-2508

ISSN En ligne: 1943-6009

SJR: 0.185 SNIP: 0.268 CiteScore™:: 1.5 H-Index: 22

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DESIGN AND MODELING OF BAND-PASS FILTERS ON COAXIAL RESONATORS FOR THE CELLULAR COMMUNICATION SYSTEMS

Volume 79, Numéro 13, 2020, pp. 1121-1127
DOI: 10.1615/TelecomRadEng.v79.i13.20
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RÉSUMÉ

The provided analysis shows the need to ensure non-interference operation of radio electronic facilities (REF) by eliminating the incompatible radio technologies in the adjacent frequency bands or by minimizing interference as far as possible. A presented example based on the cellular communication systems suggests that one of the factors influencing the size of a guard interval is the need to 'filter-out' nearby radio technologies operating in opposite directions of transmission. In such instances, filters shall be used to avoid interference. Filters will allow, in the first place, to create necessary attenuation in the reception band of the base station (BS) of nearby radio technology to suppress out-of-band and spurious emissions, furnishing by BS own transmitter; and in the second place, to create attenuation in the transmission band of nearby radio technology to reduce signals coming from BS transmitters of nearby radio technology at the input of own BS receiver. Additional high slope AFR filters may be required for both the BS transmitters and BS receivers in some frequency ranges in Ukraine. This article contains the results of modeling, designing, experimental research and testing of the band-pass electric filter with cross-links in a wide range of UHF bands (820-843 MHz and 890-915 MHz, 1920-1980 MHz and 2510-2570 MHz) using the low-frequency filter prototype method.

RÉFÉRENCES
  1. Slobodyanyuk, P.V., Narytnik, T.M., Blagodarny, V.G., Saiko, V.G., et al., (2012) Theory and practice of radio frequency resource management, Manual. State University Information and Communication Technologies Publ, Kyiv, Ukraine: 596 p., (in Ukrainian).

  2. Matthaei, George L., Young, Leo, and Jones, Edward M., (1963) Microwave Filters, Impedance-Matching Networks, and Coupling Structures. Vol. 2, McGraw-Hill Book Company, New York, San Francisco, Toronto, London, 1080 p.

  3. Ness, J.B., (1998) A unified approach to the design, measurement, and tuning of coupled-resonator filters, IEEE Transactions on Microwave Theory and Techniques, 46(4), pp. 343-351. D0I:10.1109/22.664135.

  4. Korsak, V.F., Narytnik, T.M., Voitenko, O.G., Porshnev, V.L., and Lutchak, O.V., (2014) Frequency sampling device for radio monitoring of cellular base stations of the CDMA-800 standard, Trans. of the 4th International Scientific and Practical Conference "Infocommunications - Present and Future", 1, pp. 51-54, (in Ukrainian).

  5. Korsun, V.I., Korsak, V.F., Narytnik, T.M., and Lutchak, O.V., (2017) The latest solutions to ensure electromagnetic compatibility of base stations of communication systems in adjacent frequency bands, Trans. of the 6th International Radioelectronic Forum "Applied Radioelectronics. Status and prospects of development", 1, pp. 273-277, (in Ukrainian).

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