Journal ArticleDOI
Analysis and Simulation of Reentrant Cylindrical Cavities
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In this paper, reentrant circular cylindrical cavities are analyzed on the basis of a mathematically simple formalism extending the range of validity of expressions for resonant frequency and quality factor obtained from lumped RLC constant models.Abstract:
Of applications ranging from electron spin resonance to detection of gravitational waves, reentrant circular cylindrical cavities are analyzed on the basis of a mathematically simple formalism extending the range of validity of expressions for resonant frequency and quality factor obtained from lumped RLC constant models. Several cavity configurations in the 1 – 3 GHz range are analytically examined in excellent agreement with frequencies obtained from Superfish code.read more
Citations
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Journal ArticleDOI
A High-Sensitivity Microfluidic Sensor Based on a Substrate Integrated Waveguide Re-Entrant Cavity for Complex Permittivity Measurement of Liquids.
TL;DR: Experimental results demonstrate that the designed sensor is capable of characterizing the complex permittivities of various liquids with an accuracy of higher than 96.76% (compared with the theoretical values obtained by Debye relaxation equations), and it is available for quantifying the concentration ratio of a given binary mixture.
Journal ArticleDOI
Rigorous analysis of highly tunable cylindrical transverse magnetic mode re-entrant cavities.
Jean-Michel Le Floch,Yaohui Fan,Michel Aubourg,Dominique Cros,N. C. Carvalho,Qingxiao Shan,Jeremy Bourhill,Eugene Ivanov,Georges Humbert,Valérie Madrangeas,Michael E. Tobar +10 more
TL;DR: This work designs a highly tunable cavity that can be tuned from 2 GHz to 22 GHz just by inserting a post into a fixed dimensioned cylindrical cavity, and shows this is possible, as the mode structure transforms from a re-entrant mode during the tuning process to a standard cylINDrical transverse magnetic mode.
Journal ArticleDOI
A Millimeter-Wave Klystron Upconverter With a Higher Order Mode Output Cavity
Graeme Burt,Lei Zhang,D. A. Constable,Huabi Yin,Christopher James Lingwood,Wenlong He,Claudio Paoloni,Adrian W. Cross +7 more
TL;DR: In this article, the authors proposed a solution to overcome the reduced impedance by utilizing an upconverter, where all cavities except the output cavity are designed to work in high-order mode.
Journal ArticleDOI
A Modified SIW Re-Entrant Microfluidic Microwave Sensor for Characterizing Complex Permittivity of Liquids
TL;DR: In this article, a modified substrate integrated waveguide (SIW) reentrant microwave sensor is implemented by an annular slot loaded SIW re-entrant cavity resonator to evaluate complex permittivity of liquid under test (LUT).
Journal ArticleDOI
The Schenberg data acquisition and analysis: results from its first commissioning run
César A. Costa,Odylio D. Aguiar,Nei F. Oliveira,Xavier Gratens,Sergio Turano de Souza,S R Furtado +5 more
TL;DR: An overview of the Mario Schenberg gravitational wave detector and its data acquisition system is presented, some results from the first commissioning run and solutions for some problems it has identified are presented.
References
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Journal ArticleDOI
General Treatment of Klystron Resonant Cavities
TL;DR: In this paper, it was shown that a reentrant cavity can be expressed as a low-frequency series LCR/sub se/ circuit or a shunt L CR/sub sh/ circuit, taking L as the inductance of a toroidal coil with one turn and with a cross section the same as the cavity, C as the gap capacitance plus the equivalent capacitance of the cavity.
Journal ArticleDOI
On the Resonant Frequency of Closed Concentric Lines
TL;DR: In this article, a new and more exact method of calculating the resonant frequency of closed concentric line resonators of the type shown in Fig. 1 is developed, which becomes more accurate as the length of the line becomes small by comparison with a quarter wave length.
Journal ArticleDOI
A mode-locked microchip laser optical transmitter for fiber radio
A.J.C. Vieira,Peter R. Herczfeld,Arye Rosen,M. Ermold,E.E. Funk,W.D. Jemison,Keith J. Williams +6 more
TL;DR: In this article, the authors describe a mode-locked millimeter-wave optical transmitter based on simple electrooptic microchip laser technology, which can operate from a few gigahertz to 100 GHz and beyond.
Journal ArticleDOI
New results for coaxial re-entrant cavity with partially dielectric filled gap
TL;DR: In this article, a set of varied parameters of a coaxial re-entrant cavity with a gap partially filled with a dielectric was analyzed using the mode matching technique.
Journal ArticleDOI
The Brazilian spherical detector: progress and plans
Odylio D. Aguiar,L A Andrade,Joaquim J. Barroso,L. Camargo Filho,L A Carneiro,Cecília Silva de Castro,Pedro J. Castro,C. A. Costa,K M F Costa,J. C. N. de Araujo,A U de Lucena,W. de Paula,E C de Rey Neto,S.L.T. de Souza,A C Fauth,Carlos Frajuca,Giorgio Frossati,S R Furtado,Lucrecia Camilo De Lima,Nadja S. Magalhães,Rubens M. Marinho,E S Matos,J L Melo,Oswaldo D. Miranda,Nei F. Oliveira,Bruno Woltzenlogel Paleo,M Remy,K L Ribeiro,C Stellati,W F Velloso,J. Weber +30 more
TL;DR: The Schenberg gravitational wave detector at the Physics Institute of the University of Sao Paulo (UPS) was built by the Brazilian Graviton Project (BGP) as mentioned in this paper.
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