Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 60 for “"band pass"”.
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An enhanced design procedure for microstrip band pass filters
Low cost bandpass filters (less than $100) at microwave frequencies cannot be purchased commercially. However, such filters are essential in the design of RF circuits in communications and radar equipment. Reliable microstrip band pass filters which provide an accurate filter response at microwave …
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Noise analyzer--band-pass filter of variable width and mean frequency
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1941.
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The realisation of band-pass amplifier by utilising negative feedback principle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1939.
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Integrated realizations of reconfigurable low pass and band pass filters for wide band multi-mode receivers
… chosen architecture, the filters can exhibit low pass or band pass frequency responses.The idea of reconfigurable frequency parameters has been introduced since the beginning of modern filtering applications due to the required precision of the frequency response. However, the reconfiguration of …
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Competition and band-pass filtering in biology: modelling and experimental validation in membrane trafficking and post-transcriptional gene regulation
L'abstract è presente nell'allegato / the abstract is in the attachment
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Design multilayer bandpass filter using hairpin resonator for digital broadcasting
This research presents 2.52-2.65 GHz band-pass filter using multilayer hairpin resonator for digital broadcasting applications . Four-pole resonators are centered at 2.58 GHz with bandwidth of 130 MHz .This filter is simulated using Computer Simulation Technology software (CST) and Advance Design …
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Filter Design for Interference Cancellation for Wide and Narrow Band RF Systems
… They are employed for different purposes of band selection, channel selection, interference cancellation, image rejection, etc. These are all translated in selecting the wanted signal while mitigating the rest. This can be performed by either selecting the desired frequency range by a band …
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Tunable Filters and Interference Rejection System for Interferer Suppression at RF and Microwave Bands
… or cognitive radios which access a wideband or multiband spectrum dynamically. It is desirable for the wireless systems to have high frequency selectivity early in the receiver chain at RF to relax the dynamic range requirements of subsequent stages. However, integration of high …
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Bio-inspired error-tolerant and energy-efficient signal processing
… is achieved using low cost, overlapping band-pass filters rather than conventional non-overlapping band-pass filters. Energy savings are also achieved by operating the hardware at a voltage lower than the nominal voltage (voltage overscaling), which leads to hardware timing errors. In the …
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A Complex-Envelope FDTD Formulation Using Real-Valued Field-Variables
… of the complex-envelope (CE) representation of band-pass limited sources and their resulting fields increases the allowable time-step in finite-difference time-domain (FDTD) simulations. The complex envelope representation transforms band-pass limited fields and sources to complex-valued …
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Control and monitoring of an intra-aortic balloon pump for cardiac assist
… Intra-Aortic Balloon Pump is described. A narrow band-pass filter is used to reduce noise and limit the input to the detector to the spectrum within which the R-wave of an ECG signal lies. A safety circuit to prevent the heart pumping against an inflated balloon is incorporated. History of the 8 …
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Study of Multiple ASE-Noise Effects and A Filtering Solution For Soliton Propagation Through Optical Fibers
… frequency shift, followed by a fixed-frequency band-pass filter. After several considerations, it is determined that acousto-optic tunable filters (AOTF)s are capable of providing the narrowband filtering capabilities required for the design as well as the necessary frequency shifting aspects of …
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Sistema autônomo tri-banda de aquisição e armazenamento de dados para caracterização de paisagem acústica submarina
… system. As a project differential, a tri-band filter was developed, aiming to separate the frequency bands (low-pass, band-pass and high-pass filters), including amplifiers with gain adjustable through the microcontroller. Based on the design, a prototype was built, its features were …
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Acoustic correlates of word stress in American English
… and noise at high frequencies, determined by band-pass filtering the F3 region of the spectrum. Furthermore, the results indicate that word stress cues are augmented when the high focal pitch accent is on the target word.
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The use of chemiluminescence for the detection of temperature and fuel-to-air ratio in turbulent premixed flames
… An optical system using fiber optics and band pass interference filters was also investigated. The spectra of turbulent, premixed methane flames of known stoichiometry were recorded. A high temperature Pt-Pt10%Rh thermocouple was used to establish flame temperature. The ratio of signal …
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Integrated Tunable LC Higher-Order Microwave Filters for Interference Mitigation
… radio is able to cover multiple bands and multiple operating standards. However, in the increasingly hostile RF environment, filtering becomes a bottleneck for SDRs as the traditional off-chip filters are fixed frequency and bulky. Therefore, tunable filtering is a critical …
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Design of Miniaturized On-Chip Passive Circuits in Silicon-Based Technology for 5G Communications
… to perform the process of selecting frequency band for different RF signals, and to reduce the spurious items in the transmitter and receiver chain and interference signals outside the whole transceiver system. As far as on-chip filtering solutions are concerned, the recent solutions are mainly …
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Bandpass filter design with spurious frequency reduction capability
Passband microstrip coupled line filter are widely used in daily microwave engineering practice. There are various topologies to implement microstrip bandpass filters such as end-coupled, parallel coupled, hairpin, interdigital and combine filters. This thesis discusses design, simulation, …
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Hand and elbow gesture recognition based on electromyography signal
… is presented using a 6th order Butterworth band pass filter, low and high pass filter with normalization. Furthermore, the features are evaluated using Variance (VAR), Standard Deviation (SD) and Root Mean Square (RMS) to test the significance of the features. Nevertheless, the K-Nearest …
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