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    Wyświetlanie 1-6 z 6
    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:
    Analysis of Substrate Integrated Waveguide (SIW) Resonator and Design of Miniaturized SIW Bandpass Filter
    Autorzy:
    Rhbanou, A.
    Bri, S.
    Sabbane, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/226670.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    integrated waveguide
    dielectric materials
    cavity resonator
    band-pass filter
    low temperature cofired ceramic
    Opis:
    In this paper, the substrate integrated waveguide (SIW) resonator is designed to study the influence of dielectric materials on its operating parameters (insertion loss, fractional bandwidth and unloaded Q-factor). The results obtained show that the use of high permittivity substrate in the SIW resonator by increasing its thickness allows reducing the size of resonator by causing the increase in its unloaded Q-factor. A SIW bandpass filter is designed using low temperature co-fired ceramic (LTCC) technology and high permittivity substrate. The filter has a fractional bandwidth of 27 % centered at 14.32 GHz with insertion loss of 0.7 dB.
    Źródło:
    International Journal of Electronics and Telecommunications; 2017, 63, 3; 255-260
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent advances in mode converters for a mode division multiplex transmission system
    Autorzy:
    Memon, A. K.
    Chen, K. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818205.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    integrated optical device
    mode converters
    mode division multiplex
    optical waveguide
    Opis:
    Adopting mode division multiplex (MDM) technology as the next frontier for optical fiber communication and on-chip optical interconnection systems is becoming very promising because of those remarkable experimental results based on MDM technology to enhance capacity of optical transmission and, hence, making MDM technology an attractive research field. Consequently, in recent years the large number of new optical devices used to control modes, for example, mode converters, mode filters, mode (de)multiplexers, and mode-selective switches, have been developed for MDM applications. This paper presents a review on the recent advances on mode converters, a key component usually used to convert a fundamental mode into a selected high-order mode, and vice versa, at the transmitting and receiving ends in the MDM transmission system. This review focuses on the mode converters based on planar light wave circuit (PLC) technology and various PLC-based mode converters applied to the above two systems and realized with different materials, structures, and technologies. The basic principles and performances of these mode converters are summarized.
    Źródło:
    Opto-Electronics Review; 2021, 29, 1; 13--32
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compact Transverse Electric Silicon-on-Insulator Mode Converter for Mode-Division Multiplexer
    Autorzy:
    Sharaf, Mohamed H.
    El-Mashade, Mohamed B.
    Emran, Ahmed A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2055263.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    integrated optics
    silicon-on-insulator waveguide
    WDM & MDM systems
    perturbation theory
    integrated optical
    devices
    hybrid modes
    guided waves
    Opis:
    On-chip optical-interconnect technology emerges as an attractive approach due to its ultra-large bandwidth and ultra-low power consumption. Silicon-on-insulator (SOI) wire waveguides, on the other hand, have been identified to potentially replace copper wires for intra-chip communication. To take advantage of the wide bandwidth of SOI waveguides, wavelengthdivision multiplexing (WDM) has been implemented. However, WDM have inherent drawbacks. Mode-division multiplexing (MDM) is a viable alternative to WDM in MIMO photonic circuits on SOI as it requires only one carrier wavelength to operate. In this vein, mode converters are key components in on-chip MDM systems. The goal of this paper is to introduce a transverse electric mode converter. The suggested device can convert fundamental transverse electric modes to first-order transverse electric ones and vice versa. It is based on small material perturbation which introduces gradual coupling between different modes. This device is very simple and highly compact; the size of which is 3 μm². Mathematical expressions for both the insertion loss and crosstalk are derived and optimized for best performance. In addition, three-dimensional finite-difference time-domain (3D-FDTD) simulations are performed in order to verify the mathematical model of the device. Our numerical results reveal that the proposed device has an insertion loss of 1.2 dB and a crosstalk of 10.1 dB. The device’s insertion loss can be decreased to 0.95 dB by adding tapers to its material perturbation.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 2; 275--280
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bandwidth Enhancement for Half Mode Substrate Integrated Waveguide Antenna using Defected Ground Structures
    Autorzy:
    Astuti, Dian Widi
    Rivayanto
    Muslim
    Simanjuntak, Imelda
    Firmansyah, Teguh
    Cahyasiwi, Dwi Astuti
    Natali, Yus
    Powiązania:
    https://bibliotekanauki.pl/articles/27311970.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Bandwidth enhancement
    dual cavity
    half modesubstrate integrated waveguide
    defected ground structure
    U-slot
    Opis:
    The SIW antenna suffers from the narrow bandwidth for a single cavity and single resonant. Defected ground structure (DGS) with a dual cavity was the solution to solve narrow bandwidth by resulting in hybrid resonance. The hybrid resonance with 14.83% impedance bandwidth is proposed in this antenna design. The first resonance resulted from the combination of the TE101 modes from inner and outer HMSIW cavities while the second resonance resulted from the combination of the strong TE101 and the weak TE102 mode from the inner HMSIW cavity and the addition of the weak TE101 from the outer HMSIW cavity. The measurement antenna design has a broadband antenna with a 14.31% (5.71 – 6.59 GHz) impedance bandwidth by using substrate Rogers RO 5880.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 3; 449--454
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mitigating the bending losses of the silica-titania-based rib waveguide structure
    Autorzy:
    Shahbaz, Muhammad
    Kozłowski, Łukasz
    Butt, Muhammad A.
    Piramidowicz, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/2204159.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    photonic integrated chips
    waveguides
    silica-titania
    ridge waveguide
    strip waveguide
    Opis:
    Optical waveguides (WGs) are widely used as interconnects in integrated optical circuits both for telecommunication and sensing applications. There are different kind of optical WG designs that offers different guiding parameters, opening a vast number of possibilities. A silica-titania (SiO₂:TiO₂) rib WG is discussed and examined by a numerical analysis in this article with a great emphasis on the analysis of bending losses and optimization. A modal analysis for different basic parameters of the WG is presented with a detailed wavelengthbased modal analysis. Various potential fabrication methods are discussed, however, a solgel method and dip-coating deposition technique are proposed for the low-cost development of such WGs. Moreover, an approach towards minimizing the bending losses by adding an upper cladding layer on the rib WG is presented and described.
    Źródło:
    Opto-Electronics Review; 2023, 31, 1; art. no. e145551
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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