Theoretical and Experimental Study of the Resonant Frequency of a Cylindrical Dielectric Resonator

1983 ◽  
Vol 31 (10) ◽  
pp. 844-848 ◽  
Author(s):  
D. Maystre ◽  
P. Vincent ◽  
J.C. Mage
Keyword(s):  
Experimental Study ◽  
Resonant Frequency ◽  
Dielectric Resonator

scholarly journals Experimental Study on LTCC Glass-Ceramic Based Dual Segment Cylindrical Dielectric Resonator Antenna

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Ravi Kumar Gangwar ◽  
S. P. Singh ◽  
Meenakshi Choudhary ◽  
D. Kumar ◽  
G. Lakshmi Narayana Rao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Contact Angle ◽  
Resonant Frequency ◽  
Glass Ceramic ◽  
Material Properties ◽  
Dielectric Resonator ◽  
Return Loss ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Dielectric Resonator Antenna

The measured characteristics in C/X bands, including material properties of a dual segment cylindrical dielectric resonator antenna (CDRA) fabricated from glass-ceramic material based on B2O3–La2O3–MgO glass and La(Mg0.5Ti0.5)O3 ceramic, are reported. The sintering characteristic of the ceramic in presence of glass is determined from contact angle measurement and DTA. The return loss and input impedance versus frequency characteristics and radiation patterns of CDRA at its resonant frequency of 6.31 GHz are studied. The measured results for resonant frequency and return loss bandwidth of the CDRA are also compared with corresponding theoretical ones.

scholarly journals THE USE OF (Mg0.9Zn0.1)TiO3+2wt.% Bi2O3 CERAMICS AS A DIELECTRIC RESONATOR OSCILLATOR MATERIAL AND CHARACTERISATION OF STRUCTURE, MICROSTRUCTURE, AND DENSITY

2021 ◽  
Vol 13 (2) ◽  
pp. 67-79
Author(s):  
Afandy Kadarosman ◽  
Frida Ulfah Ermawati
Keyword(s):  
Sinter Temperature ◽  
Resonant Frequency ◽  
Bulk Density ◽  
Dielectric Resonator ◽  
Milled Powder ◽  
Telecommunications Industry ◽  
Lattice Parameter ◽  
Solid Surfaces ◽  
Microwave Frequencies ◽  
Frequency Position

Magnesium titanate (MgTiO3)-based ceramics have the potential for use in the telecommunications industry at microwave frequencies, including as a resonator in dielectric resonator oscillator (DRO) circuit. This research is intended to study the application of (Mg0.9Z0.1)TiO3+2wt.% Bi2O3 (abbreviated MZT01-2) ceramics as DRO material and characterize the structure, microstructure, and bulk density. Fabrication was carried out by ball milling between (Mg0.9Z0.1)TiO3 crystalline powder and 2wt.% Bi2O3 powder. The milled powder was compacted at certain pressure using a die press to become pellets. All pellets were sintered at 1000, 1100, 1200°C for 4 h to obtain ceramics. The structural characterization using XRD showed that the three ceramics contained the main MgTiO3 phase, each 93.63, 93.83, and 90.78% molar, the rest was the MgTi2O5 phase. The increase in sinter temperature causes the lattice parameter and the unit cell volume to decrease. The Archimedes bulk density was 2.928; 2.832 and 2.736 g/cm3. The microstructure is solid surfaces with a grain diameter of 1.9-2.3 μm accompanied by pores. As DRO materials, the three ceramics exhibited a resonant frequency at 5.11, 5.08, and 5.12 GHz which shows that the ceramics can be applied as DRO materials at microwave frequencies. The sinter temperature variation tends not to affect the resonant frequency position.

Experimental Study of Liquid Slosh Dynamics in a Partially-Filled Tank

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Guorong Yan ◽  
Subhash Rakheja ◽  
Kamran Siddiqui
Keyword(s):  
Experimental Study ◽  
Resonant Frequency ◽  
Excitation Frequency ◽  
Longitudinal Mode ◽  
Longitudinal Force ◽  
Scale Model ◽  
Fill Volume ◽  
Pitch Moment ◽  
Close Proximity ◽  
Rigid Mass

This article reports on an experimental study conducted to investigate slosh forces and moments caused by fluid slosh within a partly-filled tank subjected to lateral and longitudinal excitations applied independently. The experiments were performed on a scale model cleanbore and a baffled tank with laterally placed single- and multiple-orifice baffles. The experiments were conducted for three different fill volumes and different types of excitations: continuous harmonic and single-cycle sinusoidal excitations of different amplitudes and discrete frequencies. The dynamic forces and moments caused by fluid slosh with the baffled and cleanbore tank configurations were measured for different fill volumes and excitations using three-axis dynamometers. It is shown that the resulting forces and moments comprise many spectral components that can be associated with the excitation, resonance, and vibration and beat frequencies. Modulation of excitation frequency with the resonant frequency was also evident for all fill conditions and tank configurations when the two were in close proximity. The results also showed that the peak amplifications of forces and moments occur in the vicinity of the resonant frequency. At higher frequencies, the peak magnitudes of the forces, however, reduced significantly to values lower than the inertial forces developed by an equivalent rigid mass. At a given excitation condition, the slosh force amplitude increased with a decrease in the fill volume. It was also observed that the presence of baffles has negligible effect on the lateral slosh force and the corresponding resonant frequency. However, it caused a significant increase in the longitudinal mode resonant frequency. The baffles greatly reduced the amplifications in longitudinal force and pitch moment under longitudinal acceleration excitations.

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