Total Quality Factor Research Articles

Coupled mode theory-based analytical model of a ring resonator refractive index sensor incorporating bending loss and dispersion

This paper presents an analytical model of a silicon nitride-based 2D ring resonator refractive index (RI) sensor using coupled mode theory (CMT). The proposed model decomposes the ring resonator into two coupling regions and employs coupled-mode equations to describe input and output amplitudes via scattering matrix analysis. The proposed sensor, operating with varying refractive indices in the background cladding, demonstrates a sensitivity of 218 nm/RIU and a total quality factor of 1198. A comprehensive analysis of the bending loss in the proposed sensor is conducted, elucidating its impact on sensitivity, coupling quality factor, and intrinsic quality factor. This analysis aids in the selection of optimal ring resonator parameters, including radius, width, and gap, to achieve superior sensing performance. Furthermore, the paper examines the effect of dispersion on sensitivity and quality and compares the results with those obtained from CMT-based silicon core ring resonator and disk resonator RI sensors. This study provides valuable insights for the design and optimization of high-performance silicon nitride-based RI sensors for various applications.

Selective active resonance tuning for multi-mode nonlinear photonic cavities

Resonant enhancement of nonlinear photonic processes is critical for the scalability of applications such as long-distance entanglement generation. To implement nonlinear resonant enhancement, multiple resonator modes must be individually tuned onto a precise set of process wavelengths, which requires multiple linearly-independent tuning methods. Using coupled auxiliary resonators to indirectly tune modes in a multi-resonant nonlinear cavity is particularly attractive because it allows the extension of a single physical tuning mechanism, such as thermal tuning, to provide the required independent controls. Here we model and simulate the performance and tradeoffs of a coupled-resonator tuning scheme which uses auxiliary resonators to tune specific modes of a multi-resonant nonlinear process. Our analysis determines the tuning bandwidth for steady-state mode field intensity can significantly exceed the inter-cavity coupling rate g if the total quality factor of the auxiliary resonator is higher than the multi-mode main resonator. Consequently, over-coupling a nonlinear resonator mode to improve the maximum efficiency of a frequency conversion process will simultaneously expand the auxiliary resonator tuning bandwidth for that mode, indicating a natural compatibility with this tuning scheme. We apply the model to an existing small-diameter triply-resonant ring resonator design and find that a tuning bandwidth of 136 GHz ≈ 1.1 nm can be attained for a mode in the telecom band while limiting excess scattering losses to a quality factor of 106. Such range would span the distribution of inhomogeneously broadened quantum emitter ensembles as well as resonator fabrication variations, indicating the potential for the auxiliary resonators to enable not only low-loss telecom conversion but also the generation of indistinguishable photons in a quantum network.

Monitoring the mass, eigenfrequency, and quality factor of mammalian cells

The regulation of mass is essential for the development and homeostasis of cells and multicellular organisms. However, cell mass is also tightly linked to cell mechanical properties, which depend on the time scales at which they are measured and change drastically at the cellular eigenfrequency. So far, it has not been possible to determine cell mass and eigenfrequency together. Here, we introduce microcantilevers oscillating in the Ångström range to monitor both fundamental physical properties of the cell. If the oscillation frequency is far below the cellular eigenfrequency, all cell compartments follow the cantilever motion, and the cell mass measurements are accurate. Yet, if the oscillating frequency approaches or lies above the cellular eigenfrequency, the mechanical response of the cell changes, and not all cellular components can follow the cantilever motions in phase. This energy loss caused by mechanical damping within the cell is described by the quality factor. We use these observations to examine living cells across externally applied mechanical frequency ranges and to measure their total mass, eigenfrequency, and quality factor. The three parameters open the door to better understand the mechanobiology of the cell and stimulate biotechnological and medical innovations.

Ultrasonic P-Wave to Acquire Parameters of Boise Sandstone

Boise sandstone has a variety of grain diameter, and the heterogeneity makes it difficult to characterize. In this paper, a model of viscous squirt is used to simulate velocity and attenuation of ultrasonic P-wave in the sandstone saturated with water. Phase velocity yielding from the model is fitted against the velocity measured at frequency of 500 kHz, which determinates the quality factor due to viscous squirt ( Q p s ) as a function of frequency. The resulting Q p s appears to be 14.64 at frequency of 0.8 MHz. With the use of the measured total quality factor ( Q p ) of 6.9 at 0.8 MHz, the dry quality factor ( Q p d ) appears to be 13.0 at 0.8 MHz. The resulting dimension of the rock unit is 0.150 multiplied by 0.140 mm, pretty consistent with the mean grain diameter of 0.150 mm. The relative first and second porosities are ascertained to be 0.976 and 0.024, respectively, and the aperture distance of the second porosity is 0.84 μm. Nonetheless, the model represents analytical continuation of small rock samples. Consequently, seismic attenuation predicted by the model is far smaller than field observation. The discrepancy shows that strong seismic attenuation in the field is associated with a scale much larger than pore scale.

Semen Characteristics and Blood Metabolites of Hi-Plus Buck Rabbits Fed on Microalgae Nannochloropsis oculata Meal during the Summer Season

Feeding tiny amounts of micro-algae meal to animals enhances animal physiology by improving immune response, disease resistance, and gut function, as well as enhancing anti-inflammatory and antibacterial protection, reproductive performance, feed conversion ratio, and weight gain. The purpose of this study was to identify the impact of dietary microalgae meal (Nannochloropsis oculata) on physical semen quality, serum biochemical parameters, and oxidative status of Hi-Plus buck rabbits for 12 weeks during the summer. A total of 45, Hi-Plus buck rabbits aged 20-24 weeks were divided into three equally comparable experimental groups. Bucks in the first, second, and third groups were daily supplemented in their diets with 0% (control), 0.50% (T1), and 1.0% (T2) microalgae meal, respectively. Semen and blood samples were collected to evaluate semen quality traits and some serum biochemical constituents, and oxidative status, as well as serum triiodothyronine (T3) and testosterone (Ts) hormones concentrations. The obtained data revealed that dietary supplementation of Nannochloropsis oculata meal significantly improved most physical semen characteristics, including ejaculate volume, progressive sperm motility, semen pH value, sperm cell concentration, total sperm output, live sperm, and semen quality factor. Blood serum glucose, total proteins, and their fractions increased significantly in T1 and T2, compared with the control group, while total serum cholesterol and hepatic enzymes concentrations recorded a significant decrease in bucks supplemented with T1 and T2, compared with the control group. The total antioxidant capacity of serum significantly increased in both two levels of microalgae, compared with the control group. Serum T3 concentration significantly increased in both levels of dietary microalgae compared with the control group. In conclusion, dietary supplementation with Nannochloropsis oculata meal (1.0%) was advised to improve semen quality, serum constituents, and antioxidative status without any adverse effects on the liver and kidney functions of rabbits.

Adherence to lifelines diet score and risk factors of metabolic syndrome among overweight and obese adults: A cross-sectional study.

Metabolic syndrome (MetS) is one of the most significant public health issues worldwide, and diet quality is an important controllable environmental factor influencing the incidence of MetS. Numerous dietary scores have been established to assess compliance with dietary recommendations or eating patterns, many of which are not entirely food-based. Hence, Lifelines Diet Score (LLDS) was developed in response to the shortcomings of existing tools. This study aimed to assess any possible links between total food quality and cardiometabolic risk factors among overweight and obese adults. This cross-sectional study included 338 overweight and obese individuals [body mass index (BMI) > 25 kg/m2] aged 20-50 years in Tabriz, Iran. To collect dietary data, we used a validated semi-quantitative Food Frequency Questionnaire (FFQ) for Iranian population. Enzymatic-colorimetric methods were used to assess serum glucose and lipids, and enzyme-linked immunosorbent assay (ELISA) kits were used to measure insulin levels. In addition, the Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) and Quantitative Insulin Sensitivity Check Index (QUICKI) were calculated. BMI and hip circumference (HC) were significantly different (P < 0.05) amongst LLDS tertiles. Adherence to the highest tertile of LLDS was associated with lower SBP, and the subjects in higher LLDS tertiles significantly had lower systolic blood pressure (SBP) (P = 0.04). Triglyceride (TG) levels were also lower in the third tertile of LLDS with a near-significant P-value (P = 0.05). According to our results, a higher diet quality score, determined by LLDS, can be associated with a lower risk of MetS. Further experimental and longitudinal studies are needed to better understand this relationship.

Performance evaluation of silicon-chip-based mid-infrared Kerr optical frequency combs with ridge cross section

We present a complementary metal-oxide-semiconductor (CMOS) compatible platform for on-chip frequency comb generation in the mid-infrared region based on a silicon-on-insulator (SOI) microring resonator with ridge cross section. Flat dispersion tailoring is performed with dispersion variation of 4.04 × 10−6 ps/nm/km by adjusting the geometry parameter and the low-loss SOI microring resonator with total quality factor (Q) up to 106 can be realized at wavelengths from 3.3 to 3.6 µm. Furthermore, the thresholdless frequency combs consisting of 50 comb lines spanning from 3.1 to 4.0 µm (over 900 nm) can be realized using SOI microring resonator with 50 mW pump power. Besides, the study shows that the frequency interval of the comb is related to the selection of the dual-pumped wavelength. The influences of the coupling coefficient and the radius of microring on the bandwidth of mid-infrared OFC are also investigated numerically which shows that remarkable enhancement of mid-infrared OFC bandwidth can reach 449 nm when the coupling coefficient varies from 0.012 to 0.05. This research work is instructive for realizing highly integrated photonics and achieving the experimental generation of mid-infrared optical frequency combs, which could enable substantial progress in spectroscopy applications.

Design of a G-Band Extended Interaction Klystron Based on a Three-Coupling-Hole Structure

A four-cavity, large-sized beam tunnel, G-band extended interaction Klystron (EIK) is here proposed. A three-hole coupling cavity has been optimized to ensure a sufficient beam–wave interaction. The beam conductance and the total quality factor of each cavity have been analyzed to evaluate the stability of the beam–wave interaction for a 0.2-A beam current and 14.5-kV operating voltage. The particle-in-cell (PIC) simulation results show that the maximum output power is 134.5 W, with a gain of 30.3 dB and an efficiency of 4.6%, with a 3-dB bandwidth of 1 GHz.

Magnet Strength Dependence of Levitated Magnets in a Microwave Cavity

We report on the behavior of a superconducting microwave cavity containing levitated permanent magnets having a range of magnet strengths. By observing the changes in the cavity&#x2019;s loaded quality factor and resonance frequency as functions of temperature and magnet remanence, we gain an understanding of the transient motion of the magnet as well as its steady-state levitation height when the temperature drops below 1 K. Experimental measurements of Meissner-effect levitation within a 10 GHz superconducting aluminum coaxial quarter-wave stub cavity are performed for a sequence of identically shaped millimeter-scale neodymium magnets having varying strengths. Magnet levitation within the cavity is accompanied by both gradual and abrupt shifts in the resonance frequency (with a height sensitivity as large as 400 MHz/mm) as well as changes in the total quality factor (8%-17%) as a function of temperature during the superconducting transition of the aluminum cavity. Prior to magnet motion and levitation, the Q of the cavity changes quadratically with temperature, as expected, as the walls of the cavity undergo the superconducting transition. We observe, however, a deviation from the quadratic trend which is attributable to magnet movement within the cavity. Such an electromechanical system is a transducer between mechanical and microwave oscillators enabling coupling of low-frequency mechanical motion of the magnet to other quantum objects, such as magnons and transmons, which are used for sensing and quantum information processing.

Seismic scattering and absorption of oceanic lithosphericSwaves in the Eastern North Atlantic

SUMMARYThe scattering and absorption of high-frequency seismic waves in the oceanic lithosphere is to date only poorly constrained by observations. Such estimates would not only improve our understanding of the propagation of seismic waves, but also unravel the small-scale nature of the lithosphere and its variability. Our study benefits from two exceptional situations: (1) we deployed over 10 months a mid-aperture seismological array in the central part of the Eastern North Atlantic in 5 km water depth and (2) we could observe in total 340 high-frequency (up to 30 Hz) Po and So arrivals with tens to hundreds of seconds long seismic coda from local and regional earthquakes in a wide range of backazimuths and epicentral distances up to 850 km with a travel path in the oceanic lithosphere. Moreover, the array was located about 100 km north of the Gloria fault, defining the plate boundary between the Eurasian and African plates at this location which also allows an investigation of the influence of an abrupt change in lithospheric age (20 Ma in this case) on seismic waves. The waves travel with velocities indicating upper-mantle material. We use So waves and their coda of pre-selected earthquakes to estimate frequency-dependent seismic scattering and intrinsic attenuation parameters. The estimated scattering attenuation coefficients are between 10−4 and 4 × 10−5 m−1 and are typical for the lithosphere or the upper mantle. Furthermore, the total quality factors for So waves below 5 Hz are between 20 and 500 and are well below estimates from previous modelling for observations in the Pacific Ocean. This implies that the Atlantic Ocean is more attenuative for So waves compared to the Pacific Ocean, which is inline with the expected behaviour for the lithospheric structures resulting from the slower spreading rates in the Atlantic Ocean. The results for the analysed events indicate that for frequencies above 3 Hz, intrinsic attenuation is equal to or slightly stronger than scattering attenuation and that the So-wave coda is weakly influenced by the oceanic crust. Both observations are in agreement with the proposed propagation mechanism of scattering in the oceanic mantle lithosphere. Furthermore, we observe an age dependence which shows that an increase in lithospheric age is associated with a decrease in attenuation. However, we also observe a trade-off of this age-dependent effect with either a change in lithospheric thickness or thermal variations, for example due to small-scale upwellings in the upper mantle in the southeast close to Madeira and the Canaries. Moreover, the influence of the nearby Gloria fault is visible in a reduction of the intrinsic attenuation below 3 Hz for estimates across the fault. This is the first study to estimate seismic scattering and absorption parameters of So waves for an area with several hundreds of kilometres radius centred in the Eastern North Atlantic and using them to characterize the nature of the oceanic lithosphere.

Numerical analysis of low-RI WGM resonators excited by a periodically arranged multilayer dielectric planar waveguide

In the applications of whispering gallery mode (WGM) resonators, especially those with low refractive indices (RIs), optical excitation is always a critical issue due to the lack of suitable and matching waveguide materials. The Bloch surface wave (BSW) can facilitate achieving an effective coupling, resulting from its field distribution extending a large portion of its mode energy around the external surface and its easy adjustment of the effective refractive index. In this paper, a BSW waveguide platform for adaptive excitation of spherical WGM resonators is proposed, designed, and numerically analyzed. The simulation results show that the WGM resonator stimulated by BSW exhibits a resonance depth (RD) as large as ∼98% and a high total quality factor Qtotal∼3.13×104 which is in the same order of magnitude as its intrinsic value Qintrinsic of 5.8×104. Moreover, less limited by its constitutive materials, this BSW-WGM platform is robust and especially suitable for fully integrated applications.

Control the Frequency Response of a Loudspeaker by Changing Its Enclosure

This article analyzes how to control frequency response of a loudspeaker by changing the volume of its closed-box enclosure. The calculation is performed by the method of Thiele-Small on the basic of a pre-calculated loudspeaker, the parameters of which are given in third section. This became possible because of the simplification of the circuit on figure 1 to the form of circuit on figure 2. This allowed us to consider it as a second order filter (presence of two reactive elements). Obtained results are compared with corresponding characteristics of open-box enclosure of the same loudspeaker, that was pre-calculated by the author too. Results are presented graphically in figure 3 and 4. As can be seen from them, the resonant frequency of the loudspeaker in the closed-box enclosure is higher than the resonant frequency of the loudspeaker in the open box. The result in the form of a ratio is listed in table 2. Analyzing the obtained data, it can be noticed that with the change of the internal volume of the closed box (and hence its total quality factor), it is possible to affect both the resonance frequency and the peak amplitude values in these frequencies by changing the FR. The result shown in figure 3 and 4 is achieved by taking into account effect of radiation only on the one side of the driver (in the case of open-box enclosure). Closed box was calculating by taking into account both sides radiation of the driver. Shifting the resonance frequency of the system towards higher frequencies and increasing the sound pressure on the resonance generally worsens the FR of the loudspeaker (reduces the reproduction of low-frequency components of sound and increases the unevenness of the frequency). However, certain variants of this group of frequency characteristics may be useful depending on the reproducible frequency range and need of emphasize the low-frequency components (for example, in rock music). If you need a smoothed low-frequency sound, it is appropriate to use systems with low overall quality and increased internal volume or open-box enclosure. Therefore, the volume of the closed-box enclosure significantly affects the resonant frequency and the shape of the frequency response of the loudspeaker. Reducing the volume of the enclosure of the loudspeaker leads to a decrease in its frequency range due to low frequencies and at the same time increase in the unevenness of the frequency response. The change in the resonant frequency of the system as the volume of the closed-box enclosure decreases, the less the volume of the closed-box.

A comprehensive nutritional supplement made from germinated wheat to enrich drinks

The creation of new enriched and functional products contributes to the formation of a healthy type of nutrition in the population. The combination of processed wheat grain processing products into a complex nutritional supplement that can be used for enrichment will expand the range of functional products. As objects of study, a concentrate from germinated wheat grains and juice from green wheat sprouts were determined. Samples of complex nutritional supplements were prepared with different component ratios. Comparative results of organoleptic evaluation and physicochemical parameters of complex nutritional supplement samples are presented. The formulation of the complex nutritional supplement was optimized by the total quality factor, the most effective ratio of the concentrate from germinated wheat grains and juice from green wheat sprouts - 40:60. The study of the conditions and shelf life of the finished complex food additives, packaged in a vacuum bag, was carried out at a temperature of -18 ± 2 °C, air humidity of 75%. Quality control was carried out at 3 control points during 48 days of storage. The developed complex food additive, packed in a vacuum bag and frozen at a temperature of -18 ± 2 °C, air humidity of 75% has a shelf life of 40 days and can be widely used in the enrichment of drinks. The complex nutritional supplement from germinated wheat has the following indicators: dry matter content - 21.89%, vitamin C - 4.3 mg, vitamin B1 - 0.13 mg, vitamin B2 - 0.1 mg, vitamin B6 - 0.17 mg, fiber - 0.72 g. The resulting complex nutritional supplement has increased nutritional value.

New methodology to determine the loss tangent of dielectric planar samples by using electrically coupled resonators

A new methodology to determine the loss tangent of dielectric planar samples by using electrically coupled resonators is presented. The coupling between the resonators is disrupted by the sample under test (SUT). The proposed methodology is based on the analysis of the equivalent circuit of the sensor in differential and common modes. This work demonstrates that the total quality factor of the electric wall is suitable to determine the losses of the SUT for a wide range of loss tangent values. Additionally, the methodology was experimentally tested with a microstrip sensor and planar samples whose loss tangent values are between 0.000303 and 0.02. The results show that the proposed method achieves an accuracy higher than 97.74%.

Habitual Night Eating Was Positively Associated with Progress of Arterial Stiffness in Chinese Adults

Abstract Objectives Night eating habits have been associated with elevated risk of obesity, dyslipidemia, and cardiovascular disease (CVD). However, longitudinal study is lacking on whether habitual night eating, regardless of overall diet quality and total energy intake, is associated with arterial stiffness, a major preclinical pathologic change of CVD. The objective of this study was to longitudinally examine night eating habits and progression of arterial stiffness in an adult population free of major chronic disease at baseline. Methods Included were 7771 Chinese participants aged 18 years or older without history of cardiovascular disease, cancer, and diabetes prior to dietary assessment by validated semi-quantitative food frequency questionnaire in 2014–2015 (baseline), from the Kailuan Study. Participants were categorized into 3 groups based on baseline self-reported night eating habits – almost never, some days (1–5 times/wk), or most days (6 + times/wk). Arterial stiffness was assessed by brachial-ankle pulse wave velocity (baPWV) at baseline and repeatedly during follow-up visits. Progression of arterial stiffness was calculated as yearly change rate of baPWV (cm/s per year). Multiple linear regression models were used to calculate adjusted mean differences and 95% confidence intervals (CIs) across three groups, adjusting for age, sex, socioeconomic status, smoking and drinking habits, sleep quality, total energy intake, diet quality, breakfast frequency, and other cardiovascular risk factors. Results At baseline, 6625 (85.2%), 610 (7.8%), and 536 (6.9%) participants reported night eating habits as never, some days, or most days, respectively. During 3.19 ± 1.88 years of follow-up, we observed a positive association between frequency of night eating and progression of arterial stuffiness (p-trend = 0.01). The adjusted difference in change rate of baPWV between participants who ate at night almost every day and those who almost never ate at night was 14.1(95% CI: 0.6, 27.5) cm/s per year. This association was more pronounced in women than in men (p-interaction = 0.03). Conclusions In an adult population free of major chronic diseases, habitual night eating was positively associated with progression of arterial stiffness, a hallmark of arteriosclerosis and biological aging. Funding Sources None.

Simultaneous field enhancement and loss inhibition based on surface plasmon polariton mode hybridization

Abstract In common plasmonic configurations, energy loss and field enhancement are mutually restricted. In a vast majority of cases, high confinement goes together with high loss, which is a serious limitation for some applications. In an attempt of breaking this rule, which holds true for surface plasmon polariton (SPP) resonators, a multilayer trench grating microstructure with an asymmetric waveguide is considered. It supports both Fabry-Perot (FP) and cavity modes, whose hybridization exhibits unusual properties. The electric field enhancement was modulated by regulating the corresponding absorption and radiation quality factors. At the same time, energy loss was reduced, which is fundamentally ascribed to the mutual recycling of radiation energy between FP and cavity resonators. The maximum total quality factor and strongest field enhancement were both observed at the vicinity of quasi-static limit, thereby signifying that the structure exhibited simultaneous optimizations of field enhancement and loss inhibition, which is crucial to the design of high-quality SPP-based devices.

Effects of Academic dishonesty on research production in the light of Total Quality Management- an Empirical Study on Malaysian Educational Institutions – Malaysia: الانتحال المعرفي وأثره على الإنتاج البحثي في ضوء إدارة الجودة الشاملة – دراسة ميدانية على المؤسسات التعليمية الماليزية – ماليزيا

The field study aimed to investigate the causal relationship between the indicators of cognitive plagiarism represented by weak research skills, lack of deterrent punishment, different culture, certainty of impunity, peer behavior, feedback on the one hand, and the will to plagiarism on the other. It also aimed to examine the relationship between the will of plagiarism and plagiarism behavior and its role on overall quality in Malaysian educational institutions. The study followed the descriptive approach. The study sample consisted of 768 students (males = 292, females = 476). They were appointed by way of random stratified. The result of the analysis showed that the indicators of cognitive plagiarism have a positive and strong statistical relationship with the will of plagiarism, and that plagiarism has a positive statistical relationship with the behavior of cognitive plagiarism. In addition, the study revealed that the behavior of cognitive plagiarism has a strong statistical relationship with total quality factors. This finding indicates that intentional or unintentional cognitive plagiarism affects overall quality at all levels. The study recommends amending university regulations on offenses of scientific plagiarism. In addition, the development of universal laws of regulations and procedures by global educational bodies.

An Implantable Wideband Microstrip Patch Antenna Based on High-Loss Property of Human Tissue

In this paper, an approach was designed to develop an implantable wideband microstrip patch antenna (MPA) by the high-loss property of human tissue. In order to reduce the detuning effect, an extensive investigation was conducted, demonstrating the effects of high-loss human tissue on the total quality factor (Q T ), effective relative permittivity, and effective loss tangent of the deeply implanted MPA. To the best of our knowledge, the exact three parameters for the deeply implanted MPA are firstly studied. From the evolutionary point of view, a deeply implanted MPA can be treated as a resonator with the extremely low and stable Q T . As such, its wide impedance bandwidth can be easily achieved through two inherent radiative modes of the embedded MPA under the high-loss environment. Finally, the proposed MPA will be fabricated and tested, and the final outcomes are consistent with the corresponding simulated results.

Numerical investigation of disordered patch resonator absorbers

In this paper, the absorption properties of resonant patch absorbers are analyzed using the quality factor approach. The total quality factor contributing from both the dissipative quality factor and radiative quality factor is deduced. The resonant circular patch absorbers are studied under the influence of position randomness with increasing filling factor. It is observed that by introducing position disorder, it is possible to enhance the absorption bandwidth of the otherwise periodic circular patch resonant absorbers. This enhancement in absorption bandwidth is obtained due to the coupling among neighboring resonators, which results in broadening of collective resonances. The designed disordered resonant patch absorbers also exhibit polarization insensitivity for oblique incidences for both polarizations. In addition, square patch absorbers are also investigated under the periodic and disordered setting. It is found that the enhancement in the bandwidth of the disordered absorber structures is independent of the shape of the patch resonators, and depends solely on the coupling among the neighboring resonators.

Energy Loss in a MEMS Disk Resonator Gyroscope.

Analysing and minimizing energy loss is crucial for high performance disk resonator gyroscopes (DRGs). Generally, the primary energy loss mechanism for high vacuum packaged microelectromechanical system (MEMS) resonators includes thermoelastic damping, anchor loss, and electronic damping. In this paper, the thermoelastic damping, anchor loss, and electronic damping for our DRG design are calculated by combining finite element analysis and theoretical derivation. Thermoelastic damping is the dominant energy loss mechanism and contributes over 90% of the total dissipated energy. Benefiting from a symmetrical structure, the anchor loss is low and can be neglected. However, the electronic damping determined by the testing circuit contributes 2.6%–9.6% when the bias voltage increases from 10 V to 20 V, which has a considerable impact on the total quality factor (Q). For comparison, the gyroscope is fabricated and seal-packaged with a measured maximum Q range of 141k to 132k when the bias voltage varies. In conclusion, thermoelastic damping and electronic damping essentially determine the Q of the DRG. Thus, optimizing the resonance structure and testing the circuit to reduce energy loss is prioritized for a high-performance DRG design.