numerical analysis, design and two port equivalent circuit

... Split ring resonator (SRR) is a metamaterial structure which displays negative permeability values over a relatively small bandwidth around its magnetic resonance frequency. Unit SRR cells and arrays have been used in various novel applications including the design of miniaturized microwave devices ...

... Split ring resonator (SRR) is a metamaterial structure which displays negative permeability values over a relatively small bandwidth around its magnetic resonance frequency. Unit SRR cells and arrays have been used in various novel applications including the design of miniaturized microwave devices ...

tuning application guide for andrea.cdr

... same material. Although construction details have been addressed previously, it should be mentioned that the mounting bushing with its associated locking nut is frequently used as a "coarse" frequency adjustment while the rotor finalizes the intended frequency. At microwave frequencies, the configur ...

... same material. Although construction details have been addressed previously, it should be mentioned that the mounting bushing with its associated locking nut is frequently used as a "coarse" frequency adjustment while the rotor finalizes the intended frequency. At microwave frequencies, the configur ...

Microwave Engineering

... that the ideal of capacitor, inductor and resistance are first defined in DC. i. Circuit theory only apply in lower frequency. ii. Balance between two extreme: circuit and ...

... that the ideal of capacitor, inductor and resistance are first defined in DC. i. Circuit theory only apply in lower frequency. ii. Balance between two extreme: circuit and ...

as a PDF

... is capable of giving sparking potentials in uniform and non-uniform fields. The numerical values of a, b, and are 0.915, 0.21, and 0.85 respectively for SF6-N2, SF6-air and SF6-N20 mixtures. The value ofK is 502.40 for the first two mixtures and 527.70 for SF6-N20 mixtures. If U is 1, this expressio ...

... is capable of giving sparking potentials in uniform and non-uniform fields. The numerical values of a, b, and are 0.915, 0.21, and 0.85 respectively for SF6-N2, SF6-air and SF6-N20 mixtures. The value ofK is 502.40 for the first two mixtures and 527.70 for SF6-N20 mixtures. If U is 1, this expressio ...

Investigation of Bias-Temperature Instability in

... voked to describe the relaxation of dispersive systems, and  has the attributes of a dispersion parameter.4 The recoverable component R is reported at trelax = 0 s, i.e., the moment immediately after the removal of stress gate voltage. The permanent component P共tstress兲 reported here then represent ...

... voked to describe the relaxation of dispersive systems, and  has the attributes of a dispersion parameter.4 The recoverable component R is reported at trelax = 0 s, i.e., the moment immediately after the removal of stress gate voltage. The permanent component P共tstress兲 reported here then represent ...

Torsional Vibration Testing of a Non

... by a solenoid encircling a test structure. Cost-effectiveness is another advantage of the proposed transducer. To check the performance of the proposed method, the torsional natural frequencies and mode shapes on a hollow aluminum shaft were extracted. The results obtained by the proposed transducer ...

... by a solenoid encircling a test structure. Cost-effectiveness is another advantage of the proposed transducer. To check the performance of the proposed method, the torsional natural frequencies and mode shapes on a hollow aluminum shaft were extracted. The results obtained by the proposed transducer ...

High Reliability Principles and Verifications in Solid

... Fig. 7. DCL distribution in Ta/MnO2 capacitors D-case 22 uF – 20 V before (left) and after (right) 2000 hours of accelerated Life test at 85o C and 1.32 rated voltage. As one can see, DCL before the test is practically identical in Ta capacitors manufactured with traditional technology and F-Tech (F ...

... Fig. 7. DCL distribution in Ta/MnO2 capacitors D-case 22 uF – 20 V before (left) and after (right) 2000 hours of accelerated Life test at 85o C and 1.32 rated voltage. As one can see, DCL before the test is practically identical in Ta capacitors manufactured with traditional technology and F-Tech (F ...

Miter Bend Loss and Higher ... Measurements in Overmoded Millimeter-Wave Transmission Lines

... higher order modes on power loss in overmoded corrugated transmission line systems. This thesis derives the linearly polarized basis set of modes for corrugated cylindrical waveguides. These modes are used to quantify the loss in in overmoded transmission line components, such as a gap in waveguide ...

... higher order modes on power loss in overmoded corrugated transmission line systems. This thesis derives the linearly polarized basis set of modes for corrugated cylindrical waveguides. These modes are used to quantify the loss in in overmoded transmission line components, such as a gap in waveguide ...

Applying the Kelvin probe to biological tissues: Theoretical and

... are typically ionic; the fixed molecular constituents have insulating and often polar properties; and the charge relaxation process is not as instantaneous as it is in metal. In order to understand the factors contributing to the Kelvin probe measurements in biological specimens, this study develops ...

... are typically ionic; the fixed molecular constituents have insulating and often polar properties; and the charge relaxation process is not as instantaneous as it is in metal. In order to understand the factors contributing to the Kelvin probe measurements in biological specimens, this study develops ...

Mechanical Properties of Nanowires and Nanobelts

... region as small as 1 nm. It is feasible to receive a full structure characterization from TEM. A powerful and unique approach could be developed if we can integrate the structural information of a nanostructure provided by TEM with the properties measured in situ from the same nanostructure.[3–5] Th ...

... region as small as 1 nm. It is feasible to receive a full structure characterization from TEM. A powerful and unique approach could be developed if we can integrate the structural information of a nanostructure provided by TEM with the properties measured in situ from the same nanostructure.[3–5] Th ...

Literature review 7

... Correspondingly, the total electrostatic potential variation, as represented by the bending of the bands, increases so that Ei at the surface crosses over EF. This is called the intrinsic condition. Beyond this point, the concentration n of electrons (minority carriers) is larger than the concentrat ...

... Correspondingly, the total electrostatic potential variation, as represented by the bending of the bands, increases so that Ei at the surface crosses over EF. This is called the intrinsic condition. Beyond this point, the concentration n of electrons (minority carriers) is larger than the concentrat ...

electromagnetic theory - Faculty of Engineering

... system. In this condition, the cavity is said to be in resonance with the signal frequency. The resonant frequency can be calculated by solving Maxwell’s equations with the dimensions of the cavity defining the boundary conditions. Varying the cavity size will alter the resonant frequency. Some cavi ...

... system. In this condition, the cavity is said to be in resonance with the signal frequency. The resonant frequency can be calculated by solving Maxwell’s equations with the dimensions of the cavity defining the boundary conditions. Varying the cavity size will alter the resonant frequency. Some cavi ...

A Novel Soft-Switching Bidirectional DC–DC Converter With Coupled Inductors Student Member, IEEE

... direction of power flow. It is very beneficial to the battery as the low side voltage source. In [28], a unidirectional ZVS topology with coupled inductor is presented, and the recycled energy is critical for ZVS conditions. However, the drawback of this converter is the recycled energy, which incre ...

... direction of power flow. It is very beneficial to the battery as the low side voltage source. In [28], a unidirectional ZVS topology with coupled inductor is presented, and the recycled energy is critical for ZVS conditions. However, the drawback of this converter is the recycled energy, which incre ...

KTa0.6Nb0.4O3 Ferroelectric Thin Film Behavior at Microwave

... the emergence of new services. Ferromagnetic materials and microelectromechanical systems have shown interesting performances in this way. A collaboration between our laboratory (LEST) and that of Unité Sciences ChimiquesRennes (USC) has been started in order to investigate the integration of ferro ...

... the emergence of new services. Ferromagnetic materials and microelectromechanical systems have shown interesting performances in this way. A collaboration between our laboratory (LEST) and that of Unité Sciences ChimiquesRennes (USC) has been started in order to investigate the integration of ferro ...

Dielectric model of point charge defects in insulating paraelectric

... external filed changes not only the lengths of the polarized regions, but also the permittivity in these regions-considered in the next section. V. APPARENT (MEASUREABLE) PERMITTIVITY ...

... external filed changes not only the lengths of the polarized regions, but also the permittivity in these regions-considered in the next section. V. APPARENT (MEASUREABLE) PERMITTIVITY ...

A MathCAD Program to Calculate the RF Waves Coupled from a

... changes of the external quality factors (Qext): increasing the Qext from 3.4~7.6×106 to 8×106 on 5-cell cavities to reduce klystron power at operating gradients and decreasing the Q ext from 1.7~2.4×107 to 8×106 on 7-cell cavities to simplify control of Lorenz Force detuning. To understand the react ...

... changes of the external quality factors (Qext): increasing the Qext from 3.4~7.6×106 to 8×106 on 5-cell cavities to reduce klystron power at operating gradients and decreasing the Q ext from 1.7~2.4×107 to 8×106 on 7-cell cavities to simplify control of Lorenz Force detuning. To understand the react ...

Acta Mechanica Solida Sinica, Vol. 23, No. 6, December, 2010 Pu b

... (4) In changing from state D to state A, the transducer is under an open-circuit condition and the electrodes maintain the constant charge QL . A change in the applied force decreases the spacing between the two electrodes, lowering the voltage to ΦL . This cycle of operation of an electromechanical ...

... (4) In changing from state D to state A, the transducer is under an open-circuit condition and the electrodes maintain the constant charge QL . A change in the applied force decreases the spacing between the two electrodes, lowering the voltage to ΦL . This cycle of operation of an electromechanical ...

and ferrimagnetic materials based on the modified steinmetz equation

... drawback for the implementation in power electronic applications. Gradzki [21] and Severns [22] try to overcome this problem by using a Fourier expansion of the arbitrary nonsinusoidal waveforms. Equation (1) is then applied to each single Fourier component. Finally, the individual losses of the fu ...

... drawback for the implementation in power electronic applications. Gradzki [21] and Severns [22] try to overcome this problem by using a Fourier expansion of the arbitrary nonsinusoidal waveforms. Equation (1) is then applied to each single Fourier component. Finally, the individual losses of the fu ...

Piezoelectricity

... minerals: when subjected to a mechanical force, the crystals became electrically polarized. Tension and compression generated voltages of opposite polarity, and in proportion to the applied force. Subsequently, the converse of this relationship was confirmed: if one of these voltage-generating cryst ...

... minerals: when subjected to a mechanical force, the crystals became electrically polarized. Tension and compression generated voltages of opposite polarity, and in proportion to the applied force. Subsequently, the converse of this relationship was confirmed: if one of these voltage-generating cryst ...

Chapter 6 . Integrated Optics

... the properties of multilayer slab waveguides play an important role in waveguide analysis, a more comprehensive general formulation is outlined below. This task is more tractable using the field solutions of Maxwell’s equations than the ray-optics approach. A general multilayer slab is shown in Fig. ...

... the properties of multilayer slab waveguides play an important role in waveguide analysis, a more comprehensive general formulation is outlined below. This task is more tractable using the field solutions of Maxwell’s equations than the ray-optics approach. A general multilayer slab is shown in Fig. ...

Electronicon Capacitor Datasheet

... Kondensatorenwerk Gera) have been associated with the manufacture of capacitors in Gera since the late 1930s, when the SIEMENS organisation moved part of their production facility from Berlin to eastern Thuringia in the heart of Germany. Since then, the company has extended considerably. Highest qua ...

... Kondensatorenwerk Gera) have been associated with the manufacture of capacitors in Gera since the late 1930s, when the SIEMENS organisation moved part of their production facility from Berlin to eastern Thuringia in the heart of Germany. Since then, the company has extended considerably. Highest qua ...

Types of Wound Film Capacitors

... densities are possible. However, Polyester is considered a high loss film and typically not used in applications that require high current or high frequency. Polypropylene Capacitors are second in use only to Polyester. Capacitor grade Polypropylene is available in thicknesses ranging from 3 um to 1 ...

... densities are possible. However, Polyester is considered a high loss film and typically not used in applications that require high current or high frequency. Polypropylene Capacitors are second in use only to Polyester. Capacitor grade Polypropylene is available in thicknesses ranging from 3 um to 1 ...

Basics of Measuring the Dielectric Properties of Materials

... in the Keysight Application Note 1369-11. It is important to note that permittivity and permeability are not constant. They can change with frequency, temperature, orientation, mixture, pressure, and molecular structure of the ...

... in the Keysight Application Note 1369-11. It is important to note that permittivity and permeability are not constant. They can change with frequency, temperature, orientation, mixture, pressure, and molecular structure of the ...

Decoupling Capacitor with Low Inductance for High

... the air and O2 films are more than double those of ...

... the air and O2 films are more than double those of ...

# Non-radiative dielectric waveguide

The non-radiative dielectric (NRD) waveguide has been introduced by Yoneyama in 1981. In Fig. 1 the cross section of NRD guide is shown: it consists of a dielectric rectangular slab of height a and width b, which is placed between two metallic parallel plates of suitable width. The structure is practically the same as the H waveguide, proposed by Tischer in 1953. Due to the dielectric slab, the electromagnetic field is confined in the vicinity of the dielectric region, whereas in the outside region, for suitable frequencies, the electromagnetic field decays exponentially. Therefore, if the metallic plates are sufficiently extended, the field is practically negligible at the end of the plates and therefore the situation does not greatly differ from the ideal case in which the plates are infinitely extended. The polarization of the electric field in the required mode is mainly parallel to the conductive walls. As it is known, if the electric field is parallel to the walls, the conduction losses decrease in the metallic walls at the increasing frequency, whereas, if the field is perpendicular to the walls, losses increase at the increasing frequency. Since the NRD waveguide has been deviced for its implementation at millimeter waves, the selected polarization minimizes the ohmic losses in the metallic walls.The essential difference between the H waveguide and the NRD guide is that in the latter the spacing between the metallic plates is less than half the wavelength in a vacuum, whereas in the H waveguide the spacing is greater. In fact the conduction losses in the metallic plates decrease at the increasing spacing. Therefore, this spacing is larger in the H waveguide, used as a transmission medium for long distances; instead, the NRD waveguide is used for millimeter wave integrated circuit applications in which very short distances are typical. Thus an increase in losses is not of great importance.The choice of a little spacing between the metallic plates has as a fundamental consequence that the required mode results below cut-off in the outside air-regions. In this way, any discontinuity, as a bend or a junction, is purely reactive. This permits radiation and interference to be minimized (hence the name of non-radiative guide); this fact is of vital importance in integrated circuit applications. Instead, in the case of the H waveguide, the above-mentioned discontinuities cause radiation and interference phenomena, as the desired mode, being above cutoff, can propagate towards the outside. In any case, it is important to notice that, if these discontinuities modify the symmetry of the structure with reference to the median horizontal plane, there is anyway radiation in the form of TEM mode in the parallel metallic plate guide and this mode results above cutoff, the distance between the plates may be no matter short. This aspect must always be considered in the design of the various components and junctions, and at the same time much attention has to be paid to the adherence of the dielectric slab to the metallic walls, because it is possible that the above-mentioned phenomena of losses are generated. This occurs when in general any asymmetry in the cross section transforms a confined mode into a ""leaky"" mode.