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    Wyświetlanie 1-4 z 4
    Tytuł:
    A CPW-fed Sigma-shaped MIMO Antenna for Ka Band and 5G Communication Applications
    Autorzy:
    Madhav, B. T. P.
    Devi, G. J.
    Lakshman, P.
    Anilkumar, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/309564.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    5G
    coplanar waveguide
    Ka band
    MIMO
    satellite downlink
    Opis:
    This article presents a MIMO compact antenna measuring 45×45×1.6 mm, on the FR4 substrate, proposed for Ka band and 5G communication applications. The proposed design is suitable to overcome the issues connected with massive MIMO. It has four-sigma-shaped radiating elements and a c-shaped ground plane with coplanar waveguide feeding. Its compact dimensions suit it for most existing communications systems. The aerial operates in the 21–30 GHz range, which covers Ka and 5G communication bands. The proposed antenna exhibits the average efficiency of more than 76% within its operating band and gives a minimum signal to noise plus interference ratio. The presented antenna covers several services, such as Ka band satellite downlink applications and future 5G communication applications.
    Źródło:
    Journal of Telecommunications and Information Technology; 2018, 4; 97-106
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of errors in on-wafer measurements due to multimode propagation in CB-CPW
    Autorzy:
    Lewandowski, A.
    Wiatr, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/307779.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    on-wafer measurements
    multimode propagation
    error analysis
    conductor-backed coplanar waveguide (CB-CPW)
    microstrip-like mode
    numerical electromagnetic analysis
    on-wafer probe
    calibration
    de-embedding
    monolithic microwave integrated circuit (MMIC)
    Opis:
    We study for the first time errors in on-wafer scattering parameter measurements caused by the parasitic microstrip-like mode propagation in conductor-backed coplanar waveguide (CB-CPW). We determine upper bound for these errors for typical CPW devices such as a matched load, an open circuit, and a transmission line section. To this end, we develop an electromagnetic-simulations-based multimode three-port model for the transition between an air-coplanar probe and the CB-CPW. Subsequently, we apply this model to examine errors in the device S parameters de-embedded from measurements affected by the parasitic MSL mode. Our analysis demonstrates that the multimode propagation in CB-CPW may significantly deteriorate the S-parameters measured on wafer.
    Źródło:
    Journal of Telecommunications and Information Technology; 2005, 2; 16-22
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compact coplanar-fed tree-shaped antenna
    Autorzy:
    Malinowska, Małgorzata
    Kitliński, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/226372.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    broadband antenna
    fractal antenna
    reflection coefficient,
    defected ground structure
    coplanar waveguide
    Opis:
    The paper presents the concept of a fully planar tree-shaped antenna with quasi-fractal geometry. The shape of the proposed radiator is based on a multi-resonant structure. Developed planar tree has symmetrical branches with different length and is fed by a coplanar waveguide (CPW) with modified edge of the ground plane. The antenna of size 29 mm x25 mm has been designed on Taconic - RF-35 substrate (er = 3.5, tgde= 0.0018, h = 0.762 mm). The paper shows simulated and measured characteristics of return loss, as well as measured radiation patterns. The proposed antenna could be a good candidate for broadband applications (for instance: wideband imaging for medical application and weather monitoring radars in satellite communication etc.)
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 2; 175-180
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio
    Autorzy:
    Nachouane, H.
    Najid, A.
    Tribak, A.
    Riouch, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/226370.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cognitive radio
    microstrip antenna
    UWB
    coplanar waveguide
    sensing and communication tasks
    sensing antenna
    Opis:
    Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the same layer of an FR4 substrate, for manufacturing cost constraint. Therefore, the isolation between them must take into consideration. The measured mutual coupling of less than -18 dB is achieved over the whole impedance bandwidth. The proposed sensing antenna covers a wide range frequency bands ranging from 2 to 5.5 GHz. While the communication antenna operates at 2.8 GHz, and by adding inductors to the antenna, the resonant frequency can be tuned from 2.6 to 2.7 GHz. The whole antenna system was designed, fabricated, and tested. Measurement and simulation results prove the feasibility of the proposed structure for cognitive radio applications.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 2; 121-127
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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