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    Wyświetlanie 1-3 z 3
    Tytuł:
    The Idea of Enhancing Directional Energy Radiation by a Phased Antenna Array in UHF RFID System
    Autorzy:
    Jankowski-Mihułowicz, P.
    Kawalec, D.
    Węglarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/227164.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFID
    phased antenna array
    interrogation zone
    Opis:
    The interrogation zone IZ is the most important parameter when RFID systems are considered. Its predictability is determined by the construction and parameters of antenna built in a read/write device. The IZ should be of sufficient size and appropriate to requirements established for an application of object automated identification. The method of shaping an antenna radiation pattern provides effective yet unconventional opportunities in this area. The idea and practical solution of the phased antenna array dedicated to UHF read/write devices are presented in the paper. On the basis of tests carried out, the authors pointed out the possibility of using developed devices for the synthesis of a determined IZ in anti-collision RFID system.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 2; 115-120
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using the phased array antenna to increase geometric size of the interrogation zone in a UHF RFID system
    Autorzy:
    Jankowski-Mihułowicz, P.
    Kawalec, D.
    Węglarski, M.
    Lichoń, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/141093.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phased array antenna
    anti-collision identification
    interrogation zone
    RFID
    Opis:
    An attempt to increase the geometric size of the interrogation zone in UHF RFID systems with a phased array antenna is presented in this paper. The interrogation zone should be as large as possible. However, energy can be transferred to transponders only to a limited distance. The greatest flexibility in developing RFID applications and shaping the interrogation zone can be achieved using a phased array antenna. The perceived issues have been effectively dealt with and the solution has been proposed on the basis of an elaborated model. Conducted studies have been used to develop a software tool in the Mathcad environment. The research results are analyzed in detail for different system configurations and can be implemented in practical projects to be developed in cooperation with the industry.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 4; 761-772
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accurate Phase Calibration for Digital Beam-Forming in Multi-Transceiver HF Radar System
    Autorzy:
    Nguyen, H. Q.
    Whittington, J. S.
    Devlin, J. C.
    Vu, H. L.
    Vu, N. V.
    Custovic, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/227073.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital beamforming
    phased array antenna
    phase calibration
    radar
    transceivers
    Opis:
    The TIGER-3 radar is being developed as an “all digital” radar with 20 integrated digital transceivers, each connected to a separate antenna. Using phased array antenna techniques, radiated power is steered towards a desired direction based on the relative phases within the array elements. This paper proposes an accurate phase measurement method to calibrate the phases of the radio output signals using Field Programmable Gate Array (FPGA) technology. The method sequentially measures the phase offset between the RF signal generated by each transceiver and a reference signal operated at the same frequency. Accordingly, the transceiver adjusts its phase in order to align to the reference phase. This results in accurately aligned phases of the RF output signals and with the further addition of appropriate phase offsets, digital beamforming (DBF) can be performed steering the beam in a desired direction. The proposed method is implemented on a Virtex-5 VFX70T device. Experimental results show that the calibration accuracy is of 0.153 degrees with 14 MHz operating frequency.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 3; 245-254
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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