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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Wafer-level encapsulated high-performance mems tunable passives and bandpass filters

Rais-Zadeh, Mina. January 2008 (has links)
Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Farrokh Ayazi; Committee Member: James D. Meindl; Committee Member: Joy Laskar; Committee Member: Mark G. Allen; Committee Member: Paul A. Kohl. Part of the SMARTech Electronic Thesis and Dissertation Collection.
62

A novel Q tuning technique for high-Q high-frequency IF bandpass filter

Kumar, Ajay 12 1900 (has links)
No description available.
63

Design of filter banks for subband coding systems

Alexandrou, Alexandros. January 1985 (has links)
No description available.
64

Signals in nonlinear bandpass systems / Ian W. Dall

Dall, Ian W. (Ian William) January 1991 (has links)
Bibliography: leaves 222-230 / xiv, 230 leaves : ill ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1992
65

A tunable coplanar patch antenna, a polymer MEMS based tunable bandpass filter, and a chip-In-polymer packaging technology

Holland, Brian Russell, Ramadoss, Ramesh. January 2007 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references (p.40-41).
66

Study of a compact microwave ceramic coaxial resonator filter : Estudo de um filtro compacto para microondas feito com ressonadores coaxias ceramicos / Estudo de um filtro compacto para microondas feito com ressonadores coaxias ceramicos

Llerena Castro, Oscar Enrique, 1984- 26 August 2018 (has links)
Orientador: Hugo Enrique Hernandez-Figueroa / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-26T16:04:15Z (GMT). No. of bitstreams: 1 LlerenaCastro_OscarEnrique_M.pdf: 5834212 bytes, checksum: f007c788f1123ca923e5f860548252f0 (MD5) Previous issue date: 2014 / Resumo: Os filtros passa-faixa feitos com ressonadores coaxiais cerâmicos são um tipo de tecnologia de filtro que fornece características de alta performance como a alta seletividade, ótimo desempenho em aplicações de alta potência, excelente rejeição, baixa perda de inserção na banda passante, etc. , e dado que os ressonadores são feitos de materiais de alta constante dielétrica consideravelmente, consequentemente, todas as características elétricas mencionadas anteriormente são compactadas em uma estrutura protegida o qual faz que este tipo de filtros sejam adequados para aplicações onde precisam-se de dispositivos de tamanho pequeno. A parte mais difícil no momento de projetar este tipo de filtros é encontrar as dimensões certas da estrutura, sejam as alturas dos ressonadores ou as dimensões da estrutura dos capacitores de acoplamento. Esta tese presenta um estudo feito neste tipo de filtro e propõe um procedimento analítico-empírico com formulas para projeção para facilitar a construção do arranjo de ressonadores e a estrutura dos capacitores de acoplamento. Este procedimento pode ser extrapolado para filtros passa-faixa com um maior número de ressonadores. As formulas de projeção permitem uma transição fácil do modelo circuital ao modelo eletromagnético do filtro. Isto deve-se com as formulas é fácil calcular os comprimentos dos ressonadores e os valores das capacitâncias requeridas para acoplar corretamente os ressonadores. A comparação entre as simulações no modelo circuital e o entorno eletromagnético mostram que as formulas de projeção propostas são uma ótima primeira aproximação para a projeção deste filtro / Abstract: Bandpass filters made with ceramic coaxial resonators are a kind of filter technology that provides high performance features like high selectivity, high power handling, excellent rejection, low passband insertion loss, etc. and given that the resonators are made of with materials of high dielectric constant it considerably reduces their size, consequently, all the electric characteristics mentioned before are "compacted" in a small shielded structure which make these filters suitable for applications where small sized devices are a necessity. The most difficult task when projecting this kind of filters is to find the correct dimensions of the structure, either the length of the resonators or the dimensions of the coupling capacitors structure. This thesis presents a study on this type of filter and propose an analytical-empirical procedure with design formulas to facilitate construction of the resonators array and the coupling capacitors structure. This procedure can be extrapolated to bandpass filters with a greater number of resonators. The design formulas allow an easy transition from the circuital model to the electromagnetic model of the filter. This is because they easily allow to compute the length of the resonators and the value of the capacitances required for a correctly resonators coupling. The comparison between the simulations in the circuital and the electromagnetic environment show that the proposed design formulas are a good first approximation for this filter design / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica
67

Design considerations for the implementation of the front end of an optimum VLF receiver

Marsicano, Dennis Vincent. January 1976 (has links)
Thesis: Elec. E., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1976 / Bibliography: leaves 255-263. / by Dennis V. Marsicano. / Elec. E. / Elec. E. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
68

Design and Simulation of Microwave Filters Using Non-uniform Transmission Line and Superformula

Zhaoyang Li (8120606) 12 December 2019 (has links)
In this study, a novel and systematic methodology for the design and optimization of lowpass filters (LPFs), and multiorder-bandpass filters (BPFs) are proposed. The width of the LPF signal traces consistently follow Fourier truncated series, and the thickness of the substrate as well. By studying different lengths and other physical constraints, the design meets predefined electrical requirements. Moreover, superformula is used in split ring resonators (SRRs) designs to obtain a BPF response and significant structural compactness. Non-uniform transmission lines, as well as superformula equations, are programmed in MATLAB, which is also used for analytical validations. Traces are drawn in AutoCAD. The substrate of LPF is constructed in Pro/e. Finally, the optimized layouts are imported to Ansys High Frequency Structure Simulation (HFSS) software for simulation and verification. Nonuniform LPFs are optimized over a range of 0-6 GHz with cutoff frequency 3.5 GHz. Superformula implemented multiorder-BPFs are optimized with cutoff frequency of 1.1 GHz.
69

Analysis of Propagation Across Multilayered Metamaterials for Subwavelength Focusing and Bandpass Filtering Applications

Chen, Guo 10 August 2022 (has links)
No description available.
70

Microwave bandpass filters utilizing transversal and recursive signal flow concepts

Mount, Mason B. January 1989 (has links)
No description available.

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