Analysis of natural frequency and Q-factor estimation for open dielectric resonators with variation of coupling by means of fractional-rational approximation of reflection response

2011 ◽  
Author(s):  
M. V. Andreev ◽  
O. O. Drobakhin ◽  
D. Yu. Saltykov
Keyword(s):  
Natural Frequency ◽  
Rational Approximation ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Factor Estimation

Q-FACTOR AND EXCITATION EFFICIENCY OF LAMINAR QUASI-OPTICAL DIELECTRIC RESONATORS

2014 ◽  
Vol 73 (1) ◽  
pp. 73-81 ◽  
Author(s):  
A. Ya. Kirichenko ◽  
G. V. Golubnichaya ◽  
I. G. Maximchuk ◽  
V. B. Yurchenko
Keyword(s):  
Dielectric Resonators ◽  
Q Factor ◽  
Excitation Efficiency ◽  
Optical Dielectric

Dielectric-loaded L-band filters for high-power space applications

2021 ◽  
pp. 1-11
Author(s):  
Paolo Vallerotonda ◽  
Fabrizio Cacciamani ◽  
Luca Pelliccia ◽  
Alessandro Cazzorla ◽  
Davide Tiradossi ◽  
...  
Keyword(s):  
High Power ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Rf Power ◽  
Space Applications ◽  
High Q ◽  
Critical Issues ◽  
L Band ◽  
Multipactor Discharge ◽  
Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

Q factor estimation from the aftershock sequence of the 13 May 1995 Kozani earthquake

1998 ◽  
Vol 26 (2-4) ◽  
pp. 367-374 ◽  
Author(s):  
I.G. Baskoutas ◽  
G.N. Stavrakakis ◽  
I.S. Kalogeras
Keyword(s):  
Aftershock Sequence ◽  
Q Factor ◽  
Factor Estimation

Ceramic Materials for High-Quality Dielectric Resonators of Microwave Range

1992 ◽  
Vol 269 ◽  
Author(s):  
Yelizaveta A. Nenasheva
Keyword(s):  
Alkaline Earth ◽  
Ceramic Materials ◽  
Calcium Titanate ◽  
Dielectric Resonators ◽  
Microwave Range ◽  
Q Factor ◽  
High Quality ◽  
Lanthanum Aluminate ◽  
Alkaline Earth Elements ◽  
Frequency Temperature

ABSTRACTThe dielectric properties of ceramic materials and dielectric resonators on the basis of oxides of Ba,Ti and alkaline earth elements, and also of the calcium titanate-lanthanum aluminate system, with ε =82 and ε =40…48, frequency temperature coefficient (TCf) from - 10ppm/°C to + 10ppm/°C have been studied. Ceramics with ε =82 ensures the DR Q-factor of 3000 and more at f=3GHz. The Q-factor of DR made of ceramics with ε=42, TCf =0 reaches 8000 at f=7GHz.

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