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    Wyświetlanie 1-4 z 4
    Tytuł:
    Design and Analysis of Circular Slotted Microstrip Patch Antenna
    Autorzy:
    Bhattacharyya, Kaustubh
    Thangjam, Rupanda
    Goswami, Sivaranjan
    Sarmah, Kumaresh
    Baruah, Sunandan
    Powiązania:
    https://bibliotekanauki.pl/articles/963802.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    impedance matching
    microstrip
    resonance frequency
    complementary
    split ring resonators
    Opis:
    This paper presents a novel complementary CPWfed slotted microstrip patch antenna for operation at 2.4 GHz, 5.2 GHz and 6.3 GHz frequencies. The primary structure consists of the complementary split ring resonator slots on a patch and the design is fabricated on FR-4 epoxy substrate with substrate thickness of 1.6 mm. The described structure lacks the presence of a ground plane and makes use of a number of circular complementary SRRs along with rectangular slots on the radiating patch. The structure provides a wide bandwidth of around 390 MHz, 470 MHz and 600 MHz at the three bands with return losses of -11.5 dB, -24.3996dB and -24.4226 dB, respectively. The inclusion of the rectangular slots in the CSRR based slot antenna with stairecase structure improved the performance with respect to return loss.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 3; 339-345
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perturbation Element Effect on Frequency Stability in Dual Mode Reconfigurable Filters Based on Circular Microstrip Ring Resonators
    Autorzy:
    Albahnassi, Muhammad Haitham
    Malki, Adnan
    Almekdad, Shokri
    Powiązania:
    https://bibliotekanauki.pl/articles/227210.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dual mode ring resonators
    dual-mode filters
    perturbation element arrangement
    BW reconfigurability
    Opis:
    A detailed study about the suitable perturbation element shape and location for tunable BW dual mode microstrip filter which has circular ring resonator is presented. BW tuning is achieved by resonator geometry modification. The study explains the effect of a perturbation element on the stability of the center frequency during BW tuning. Different cases have been studied for two shapes of perturbation element; which one is a rectangular and the other is a radial. The treated cases discuss whether the perturbation element is located in the inner or in the outer circumference of the ring, and whether it is a patch or a notch. BW tuning simulation treated the case of FBW3dB increase for two and three times. The best case of perturbation element which has the best center frequency stability has been modeled, simulated, and fabricated at 2.4 GHz. Geometry modification of the filter took into account the RF MEMS modeling. The filter has an elliptic frequency response, and its FBW has been increased in five steps from 1.7% to 5%. The designed filters were evaluated experimentally and by simulation with very good agreement.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 4; 731-737
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heterostructure photonic crystal multichannel drop filter based on microcavities and ring resonators
    Autorzy:
    Amirkhani-Shahraki, A
    Shahraki, M N
    Mosavi, M.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/174469.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    finite difference time domain method
    ring resonators
    heterostructure
    microcavities
    photonic crystal integrated circuits
    Opis:
    In this paper, a heterostructure photonic crystal multichannel drop filter based on ring resonators and microcavities is presented. This structure has been made in the form of a two-dimensional square lattice with two regions with refractive indexes of 3.464 and 3.86. The refractive indexes are so chosen as to allow the easy and practical fabrication of the device. The presented heterostructure photonic crystal multichannel drop filter consists of a waveguide, two ring resonators and a microcavity. This microcavity is placed at the end of the bus waveguide. The ring resonators have been installed in two regions with different refractive indexes. These ring resonators act as energy couplers, and at their resonance frequencies, they capture the electromagnetic energy which is transmitted in the bus waveguide. Filter characteristics have been obtained by using the finite difference time domain method. Finally, we will demonstrate that in the optimal structure, at ports B and D (vertical), drop efficiencies close to 90% and 67%, respectively, can be obtained within the third communication window, and at port C (horizontal), an efficiency of almost 80% can be achieved within the second communication window.
    Źródło:
    Optica Applicata; 2014, 44, 1; 5-15
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study on Metamaterial-based Bio-inspired Microstrip Antenna Array for 5G Enabled Mobile Health Technology
    Autorzy:
    Colaco, John
    Cotta, Jillian
    Powiązania:
    https://bibliotekanauki.pl/articles/2055230.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstrip
    antenna
    bio-inspired
    array
    split-ring
    resonators
    metamaterial
    5G
    Opis:
    5G is a fifth-generation wireless technology that enables extremely fast data transfers and massive connection capacity. Existing Mobile health technology requires more reliable connection power and data transfer rates. The purpose of this research is to design, analyse, and compare the performance of a bio-inspired lotus-shaped microstrip patch antenna array with two to three radiating elements. The proposed antenna utilizes proximity coupled indirect microstrip transmission line feeding technique operating in the 24 GHz-30 GHz frequency band. The results indicate that performance continues to improve as the number of radiating elements increases. Moreover, each radiating element is loaded with complementary and non-complementary split-ring resonators (SRRs). The performance of the proposed microstrip antenna array is then analysed and compared with and without split-ring resonators. The findings validate that the proposed bio-inspired metamaterial-based microstrip patch array antenna is more reliable and performs better than an antenna without SRRs.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 2; 201--207
    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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