where L is the overall inductance of the resonator circuit and C its total capacitance. Several resonator designs have been published in the literature for low frequency EPR spectroscopy and imaging. 149–159 Birdcage and Litz coils (both in NMR and EPR) as well as other structures with distributed inductances and capacitances (known as lumped circuit elements) have been …

The base of the resonator is an important geometrical parameter as it will serve not only to give structural support for the resonator but also for its attachment to the host structure. In the next section, a novel resonator design is proposed, which is inspired by the double-lever mechanism analyzed in this section.

The WG resonator is essentially “oversized” for millimeter wavelengths and thus enables the designer to use larger structures. In case of an NRD-guide resonator, the dielectric block may be in the form of a rectangle made of a relatively low permittivity and low-cost dielectric material. Thus, size is not a problem.

A resonator, in this cotext, is any device in which a wave can travel back and forth between reflectors.At frequencies above ∼1 MHz a convenient implementation (Fig. 2) is a plate of piezoelectric material, crystal or ceramic, as the transmission medium for sound waves, with force-free end faces at which the sound waves, with force-free end faces at which the sound …

2024年12月16日 · Resonator A with the four-ring spoke array and relatively smaller support radius has a Q value up to 91000 in vacuum, resulting in an f × Q product of 2.14 × 10 12, while the resonator B without four-ring spoke array achieves Q value of 16900 Simultaneously, the motional impedance 30.34 kΩ of resonator A is only about one-fifth of that of ...

2015年1月25日 · The resonator is a zero-level packaged polysilicon free-free resonator operating at 25.6 MHz and exhibiting a Q-factor of 334 with a motional resistance of 5 MΩ when biased at 7 V. In this case, an additional mask is required to protect aluminum pads during metal deposition for device sealing.

The resonator must contain a neck connected to the cavity filled with a large volume of fluid. The large volume of fluid acts as the spring, while the neck acts as the mass. For the specific shape of the Helmholtz resonator example used here (see Fig. 24), the natural frequency of a 2-D Helmholtz resonator as given by Mechel (2013) is approximately

2025年2月1日 · Each resonator has a cavity and an aperture, as shown in Fig. 1. The dimensions of Helmholtz resonator are as follows: outer circle diameter R = 115 mm, inner circle diameter r = 100 mm, cavity height H = 125 mm, resonator thickness t = 7.5 mm, aperture diameter d = 10 mm, and aperture depth w = 7.5 mm. The Helmholtz resonator was made of ...

2024年7月1日 · The ends of the micro-resonator are anchored and connected to gold electrodes, which are linked to an external electrical source. We use the upper pole plate of the micro-resonator for electrostatic excitation, and apply a mixed voltage V D C + V A C cos Ω t to generate periodic excitation. The vibration signals of the micro-resonator are ...

1998年1月1日 · The scattering and absorption effects of a quarter-wave resonator can be illustrated by particle velocity vectors in 124 C. D. Field, F. R. Fricke the field of a plane wave normally incident on a Helmholtz resonator at resonance.5 Fahy5 also reports that examination of the reactive component of intensity in the vicinity of the resonator neck ...