Temat: dielectric resonator - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Design and Development of Biodegradable 3D Printed RDRA for Polarization Reconfigurability
Autorzy:: Apparao, Maganti
Karunakaran, Godi
Powiązania:: https://bibliotekanauki.pl/articles/2200726.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: polarization switching
circular polarization
linear polarization
dielectric resonator antennas
Opis:: In this article, a 3D printed rectangular dielectric resonator antenna which is capable of polarization reconfiguration has been designed. Dielectric resonator is composed of environment friendly and biodegradable material, which is Polylactic Acid. In the proposed model, the polarization can be switch from a linear to a circular by changing the state of a switch, electonically. The antenna switch between two different polarizations: Linear polarization during OFF STATE and Lefthand circular polarization during ON STATE. The proposed 3D printed dielectric resonator antenna is designed to operate in Cband of microwave spectrum, with a broad effective bandwidth (overlapped impedance bandwidths of both states) of 14.542% with centre frequency at 5.845GHz and peak gain 5.5dBi. Further, validated simulated results with experiment and both results are in good agreement.
Źródło:: International Journal of Electronics and Telecommunications; 2023, 69, 1; 69--74
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Whispering gallery resonator method for permittivity measurements
Autorzy:: Derzakowski, K.
Abramowicz, A.
Krupka, J.
Powiązania:: https://bibliotekanauki.pl/articles/308148.pdf
Data publikacji:: 2002
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: dielectric resonator
permittivity
loss tangent
measurement method
whispering gallery modes
Opis:: The new method of measuring permittivity is described. The measurements are performed using whispering gallery mode open dielectric resonators. The accuracy is assured by applications of the mode matching method. Three resonant modes (HE511, HE611 and HE711) are used in measurement procedure. Accuracy of the method is much better than 0.3% for the relative permittivity having values from 20 to 50.
Źródło:: Journal of Telecommunications and Information Technology; 2002, 1; 43-47
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Micromechanically Tunable Dielectric Rod Resonator
Autorzy:: Savin, Kostiantyn
Golubeva, Irina
Kazmirenko, Victor
Prokopenko, Yuriy
Vandenbosch, Guy A. E.
Powiązania:: https://bibliotekanauki.pl/articles/2055216.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: dielectric resonator
resonant frequency
electromechanical tuning
quality factor
mode matching technique
Opis:: A resonant frequency control method for dielectric rod resonators is discussed. A dielectric rod of cylindrical shape is placed inside a metal cavity. The bottom face of the dielectric rod is fixed at the metal base plate. Resonant frequency tuning is achieved by lifting the top metal plate above the dielectric rod upper face. The paper presents simulations using the mode matching technique and experimental study of this tunable resonator. Resonant frequency of the basic mode can be tuned by more than an octave with displacements of only tens of micrometres, which is in range of piezoactuators, MEMS, etc. A distinct feature of the proposed tuning technique is that the quality factor of the system does not degrade throughout the tuning range.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 4; 615--621
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Rectangular Dielectric Resonator Antenna with Single Band Rejection Characteristics
Autorzy:: Debab, Mohamed
Mahdjoub, Zoubir
Powiązania:: https://bibliotekanauki.pl/articles/958120.pdf
Data publikacji:: 2019
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: band-stop function
C-shaped slot
dielectric resonator antenna (DRA)
planar monopole
Opis:: In this paper, a rectangular dielectric resonator antenna (DRA) suitable for wideband applications is presented and a band notch of WLAN (5.15–5.75) GHz is proposed. The DRA is mainly composed of a 20 × 20 mm rectangular dielectric resonator, coated with metal on the top surface, and a circular monopole excitation patch with an air gap insert. A coaxial line feed is used to excite the circular, planar monopole. An open-ended quarter wavelength C-shaped slot is embedded in the circular patch to create the notched band. The simulated results demonstrate that the proposed design produces an impedance bandwidth of more than 80%, ranging from 3.10 to 7.25 GHz for a reﬂection coeﬃcient of less than −10 dB and with a band rejection at 5.50 GHz. Band notch characteristics, VSWR, and radiation patterns are studied using the HFSS high-frequency simulator and CST Studio software.
Źródło:: Journal of Telecommunications and Information Technology; 2019, 1; 76-82
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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

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