Spelling suggestions: "subject:"resonator.""
11 |
Conventional and holographic Ti:sapphire laser oscillatorsMinassian, Ara January 2001 (has links)
No description available.
|
12 |
Electrostatic testing of simple MEMS structuresCheng, Kar Mun 12 July 2006 (has links)
In this thesis, an adapted form of dynamic Electrostatic Force Microscopy is presented as an alternative technique for non-contact dynamic characterization of beam resonators. The actuation of the test resonant beam was accomplished by applying a modulated signal to a probe cantilever that was positioned closely above the resonant beam. The frequency response of the coupled electrostatic interaction between the conductive beams was studied close to the resonance of the test beams. Modulation of the input signal allowed the test resonator to be actuated without requiring on-chip circuitry, and the probing frequency range kept independent of the resonant frequency of the probe cantilever. The resonant response of three test cantilever beams were experimentally characterized using two softer probe cantilevers. A model was constructed to describe the coupled electrostatic interaction and simulations were performed to compare predictions from the model to experimental data. The amplitude response shape, resonant frequency and quality factor from the model fit well with experimental results, showing that the resonant response of a resonator can be characterized using this technique. However, the
phase and voltage variation responses were not well characterized, indicating further work to develop the force expressions in the model is needed. / October 2006
|
13 |
Analysis, modeling and simulation of ring resonators and their applications to filters and oscillatorsHsieh, Lung-Hwa 30 September 2004 (has links)
Microstrip ring circuits have been extensively studied in the past three decades. A magnetic-wall model has been commonly used to analyze these circuits. Unlike the conventional magnetic-wall model, a simple transmission-line model, unaffected by boundary conditions, is developed to calculate the frequency modes of ring resonators of any general shape such as annular, square, or meander ring resonators. The new model can be used to extract equivalent lumped element circuits and unloaded Qs for both closed- and open-loop ring resonators. Several new bandpass filter structures, such as enhanced coupling, slow-wave, asymmetric-fed with two transmission zeros, and orthogonal direct-fed, have been proposed. These new proposed filters provide advantages of compact size, low insertion
loss, and high selectivity. Also, an analytical technique is used to analyze the
performance of the filters. The measured results show good agreement with the
simulated results.
A compact elliptic-function lowpass filter using microstrip stepped impedance hairpin resonators has been developed. The prototype filters are synthesized from the equivalent circuit model using available element-value tables. The filters are evaluated by experiment and simulation with good agreement. This simple equivalent circuit model provides a useful method to design and understand this type of filters and other relative circuits.Finally, a tunable feedback ring resonator oscillator using a voltage controlled piezoelectric transducer is introduced. The new oscillator is constructed by a ring resonator using a pair of orthogonal feed lines as a feedback structure. The ring resonator with two orthogonal feed lines can suppress odd modes and operate at even modes. A voltage controlled piezoelectric transducer is used to vary the resonant frequency of the ring resonator. This tuned oscillator operating at high oscillation frequency can be used in many wireless and sensor systems.
|
14 |
Gain enhancement of microstrip patch antenna using dielectric DNG superstrate /Ali, Abdulbaset M. M. January 2009 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2009. / Typescript. Includes bibliographical references (leaves 87-93).
|
15 |
On the use of sympathetic resonators to improve low frequency transducer performanceEllsworth, John Merle. January 1990 (has links) (PDF)
Thesis (M.S. in Engineering Acoustics and M.S. in Applied Science (Antisubmarine Warfare))--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Baker, Steven R. Second Reader: Wilson, Oscar B. "September 1990." Description based on title screen as viewed on December 17, 2009. DTIC Identifier(s): Acoustic resonators, acoustic transducers, coupled network analysis, theses. Author(s) subject terms: Low frequency active, multiple scatter, sympathetic resonance, quasiresonance, coupled network analysis. Includes bibliographical references (p. 54). Also available in print.
|
16 |
Complex-source-point theory of the higher-order modes in an open resonator /Luk, Kwai-man. January 1985 (has links)
Thesis--Ph. D., University of Hong Kong, 1985.
|
17 |
Measurement of the dielectric properties of liquids, using an open resonator.Wong, Sik-kei, January 1976 (has links)
Thesis--M. Phil., University of Hong Kong, 1977.
|
18 |
Design and characterization of silicon micromechanical resonatorsHo, Gavin Kar-Fai. January 2008 (has links)
Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Member: David R. Hertling; Committee Member: Farrokh Ayazi; Committee Member: Gary S. May; Committee Member: Oliver Brand; Committee Member: Paul A. Kohl. Part of the SMARTech Electronic Thesis and Dissertation Collection.
|
19 |
Electric control of acoustic impedanceCheung, Sung-man., 張宋文. January 2010 (has links)
published_or_final_version / Mechanical Engineering / Master / Master of Philosophy
|
20 |
Complex-source-point theory of the higher-order modes in an open resonator陸貴文, Luk, Kwai-man. January 1985 (has links)
published_or_final_version / Electrical Engineering / Doctoral / Doctor of Philosophy
|
Page generated in 0.0769 seconds