Q factor Research Papers - Academia.edu (original) (raw)

46 Followers

Recent papers in Q factor

A novel optical technique is proposed for the characterization of MEMS resonators. The proposed technique is based on measuring the response of the resonator (resonance frequency and quality factor) optically, which eliminates the... more

A novel optical technique is proposed for the characterization of MEMS resonators. The proposed technique is based on measuring the response of the resonator (resonance frequency and quality factor) optically, which eliminates the electrical parasitic effects. The proposed technique was applied to a comb-drive resonator and the obtained results show good agreement with the standard electrical technique with 2-5% deviation in the resonance frequency and 2-10% in the quality factor.

In this paper, a new cross-coupled microstrip filter based on the grounded patch resonators is designed, fabricated and measured. Coupling characteristics of three basic coupling structures encountered in this class of filters are... more

In this paper, a new cross-coupled microstrip filter based on the grounded patch resonators is designed, fabricated and measured. Coupling characteristics of three basic coupling structures encountered in this class of filters are investigated using full-wave electromagnetic simulations, and the design curves for coupling coefficients and the external quality factor are presented. As the demonstration, a fourth order cross-coupled filter of this type is designed, fabricated and measured.

SUMMARY A batch-compatible, post-fabrication annealing technique based upon filament-like heating of microstructures is demon-strated as an effective means for trimming the reSonance fre-quencies (fa's) and increasing the quality... more

SUMMARY A batch-compatible, post-fabrication annealing technique based upon filament-like heating of microstructures is demon-strated as an effective means for trimming the reSonance fre-quencies (fa's) and increasing the quality factors (Q's) of surface-micromachined, ...

To what extent are firms kept out of a market by patents covering related technologies? Do patents held by potential entrants make it easier to enter markets? We estimate the empirical relationship between market entry and patents for 27... more

To what extent are firms kept out of a market by patents covering related technologies? Do patents held by potential entrants make it easier to enter markets? We estimate the empirical relationship between market entry and patents for 27 narrowly defined categories of software products during the period 1990-2004. Controlling for demand, market structure, average patent quality, and other factors,

We present a method of making low-loss split-ring resonators (SRRs) for microfluidic sensing at microwave frequencies using silver-coated copper wire. We show that a simple geometric modification and the use of square cross-section wire... more

We present a method of making low-loss split-ring resonators (SRRs) for microfluidic sensing at microwave frequencies using silver-coated copper wire. We show that a simple geometric modification and the use of square cross-section wire give greater electric field confinement in the capacitive region of the resonant sensor. We use a combination of theoretical analysis, finite-element simulations, and empirical measurements to demonstrate the subsequent increases in the sensitivity of these SRRs for complex permittivity measurements of some common solvents.

This paper presents the design and optimisation of a very high quality (Q) factor inductor using MEMS technology for 10 GHz to 20 GHz frequency band. The effects of various parameters of a symmetric inductor structure on the Q-factor and... more

This paper presents the design and optimisation of a very high quality (Q) factor inductor using MEMS technology for 10 GHz to 20 GHz frequency band. The effects of various parameters of a symmetric inductor structure on the Q-factor and inductance are thoroughly analysed. The inductor has been designed on silicon-on-sapphire (SOS) substrate because it offers superior characteristics of low

Chromatic dispersion is very serious issue for communication engineers while designing a wave division multiplexing for optical communication. In the present scenario there is a increasing demand of high speed internet which require more... more

Chromatic dispersion is very serious issue for communication engineers while designing a wave division multiplexing for optical communication. In the present scenario there is a increasing demand of high speed internet which require more capacity and more bandwidth. The effect of chromatic dispersion can be reduced by compensation technique. [1, 2] The chromatic dispersion also has inverse relationship with FWM. In this paper we used post dispersion compensation along with the fiber Bragg grating to reduce the effect of chromatic dispersion. Also we can compare the Bit error rate at different power levels 5 db, 10 db and 20 db while the length of fiber is fixed. After simulation it is proven that bit error rate is a function of input power level. The pulse broadening is a function of length of fiber which has been shown in this work When the BER increases quality factor decreases and overall fiber optic system degraded. In this paper we also prove that the BER is also a function of Length of Fiber. As the fiber length increases BER also increases. The whole simulationn is performed by Optisystem simulation software. Also by examine the eye diagram it is clear that link performance is improved by using dispersion compensation.

Thermal noise is generated naturally by thermal agitation of electrons in a conductor commonly found in opto-electronic devices. The fact that the optical medium is totally immune to noise does not exclude its occurrence in receiver... more

Thermal noise is generated naturally by thermal agitation of electrons in a conductor commonly found in opto-electronic devices. The fact that the optical medium is totally immune to noise does not exclude its occurrence in receiver parts. In communication, thermal noise has a major influence to the quality of the receiver. The lower the thermal noise the higher and more expensive is receiver sensitivity. This paper starts with a tutorial on thermal noise in common communication technologies. The major contribution factor to thermal noise power is also discussed analytically. For more comprehensive view, the includes a study on thermal noise effects network performance in terms of BER, maximum Q-factor, eye height and maximum distance. The fiber-to-the-home network is used as a test field to study the impact of two different values of thermal noise on network parameters. At the end of this paper, thermal noise minimizing techniques are also listed.

This paper presents a multi-band CMOS VCO using a double-tuned, current-driven transformer load. The dual frequency range oscillator is based on enabling/disabling the driving current in the secondary port of the transformer. This... more

This paper presents a multi-band CMOS VCO using a double-tuned, current-driven transformer load. The dual frequency range oscillator is based on enabling/disabling the driving current in the secondary port of the transformer. This approach eliminates the effect of switches connected directly to the VCO tank whose capacitance and on-resistance affect both the tuning range and the phase noise of a

Log In