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 14 of 14 for “"Transmission zeros"”.
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Physical meaning of zeros and transmission zeros from bond graph models
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Method for theoretically determining the locus and location of the transmission zeros in microwave filter networks
… quantitatively the locations and loci of complex transmission zeros (TZ's) of positively and negatively cross-coupled RF or microwave bandpass filter networks. Bandpass filters can be effectively designed by adjusting the locations of TZ's in the complex s-domain. To locate TZ's, this practical …
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Theory and design of mixed lumped-distributed cross-coupled filters with applications to linear phase shifter and tunable filters
Using cross-coupled networks of a new concept, transmission zeros were efficiently located in the complex frequency-domain. With this approach, the group delay and attenuation slope of the circuit network can be controlled to get both sharp rejection characteristics and linear phase slopes. In …
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Gap Waveguide Array Element Filters
… of 100 GHz and a bandwidth of 5 GHz, implements transmission zeros in a novel structure that fits under a slotted waveguide antenna. The structure implements two transmission zeros in the upper passband of the structure at 103.7 and 107.5 GHz with a minimum passband return loss of 14 dB. Due to …
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Safety Assurance of Non-Deterministic Flight Controllers in Aircraft Applications
… that the plant being controlled has no unstable transmission zeros and has a nonzero high frequency gain. Because most conventional aircraft do not readily meet these requirements, a process known as sensor blending was used. Sensor blending consists of using a linear combination of the plant’s …
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ΚΥΜΑΤΙΚΑ ΦΙΛΤΡΑ ΔΙΑΚΟΠΤΟΜΕΝΟΥ ΠΥΚΝΩΤΗ
… SIMULATED LC FILTERS AND FILTERS WITH TRANSMISSION ZEROS ARE DEVELOPED. BILINEAR S-Z TRANSFORMATION IS APPLIED FOR ALL CIRCUITS, THUS, THE DESIGN IS EXACT AND THERE IS NO REQUIREMENT FOR A HIGH CLOCK FREQUENCY. DETAILED EXAMPLES OF DIFFERENT DESIGNS ARE GIVEN. THE SIMULATED RESPONCES OF …
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Additive manufacturing of novel metal microwave components for space application
… multiband waveguide filters using an in-band transmission zeros approach (four variations of res onators and topologies), and integrated wideband waveguide diplexer and Continuous Transverse Stub (CTS) antenna array. The proposed models were experimentally vali dated using prototypes …
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Dynamic operability assessment : a mathematical programming approach based on Q-parametrization
… in the early 1980's identified right-half-plane transmission zeros, time delays, input constraints and model uncertainty as factors that limit the achievable closedloop performance of a process. Quantifying the performance-limiting effect of combinations of these factors has proven to be a …
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Novel miniature microwave quasi-elliptical function bandpass filters with wideband harmonic suppression
… filters has been improved by inserting a pair of transmission zeros between the passband edges, and implementing notched rejection bands in the filter’s frequency response to widen its stopband performance. The filter structures have been analysed theoretically and modelled by using Keysight …
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Novel microwave devices based on multi-port filtering networks
… of joining two or more filters using the transmission based line junctions or circulators is eliminated. It is replaced by a common resonant junction which also contributes to the resonant poles of filtering network. In this thesis, the methodology for MPFNs is developed and a number of …
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Novel narrowband microstrip filters for wireless communications systems
… methods for these resonators includes a transmission-line theory, ABCD matrix, and EM simulation based on method of moments. The measured results are used to validate the performance of the devices developed and show good agreement with the theory and simulation results. The various …
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Miniaturised and reconfigurable planar filters for ultra-wideband applications
… convenient design approach generating a pair of transmission zeros between both passband edges and a single zero in the stop band for harmonic suppression is discussed in the second section. Moreover, the development of notched rejection bands are studied and several novel methods to create a …
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Novel metamaterial frequency discriminating devices for next generation wireless communication systems
… of these microstrip devices involved the use of transmission-line theory and EM simulation tools which were based on the method of moments and finite element analyses. Measured results were used to validate the predicted behavior and performance of these devices. In fact there was good agreement …