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Dissertations / Theses on the topic 'Band reject'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Fischer, Timothy W. "An analog approach to interference suppression in ultra-wideband receivers." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5769.

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Because of the huge bandwidth of Ultra-Wideband (UWB) systems, in-band narrowband interference may hinder receiver performance. In this dissertation, sources of potential narrowband interference that lie within the IEEE 802.15.3a UWB bandwidth are presented, and a solution is proposed. To combat interference in Multi-Band OFDM (MB-OFDM) UWB systems, an analog notch filter is designed to be included in the UWB receive chain. The architecture of the filter is based on feed-forward subtraction of the interference, and includes a Least Means Squared (LMS) tuning scheme to maximize attenuation. The

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2

Šimůnek, Martin. "Analýza elektronických obvodů programem Mathcad." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218602.

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The main idea of this thesis is a propose by designing filters in Mathcad program. This paper deals with a basic principle in filters design and these principles are implemented into the Mathcad program. In the introductory part is described aproximation which was used in Mathcad script. In the other parts of this project is described program which was created on designed filters.

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3

Jeleček, Jiří. "Pseudo-diferenční kmitočtové filtry vyššího řádu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401954.

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This Master's thesis deals with pseudo-differential frequency higher order filters working in voltage mode. The thesis deals with the description of frequency filters, their types and applications. Follows an analysis of differential and pseudo-differential transmissions. Next part contains a description of used active elements (conveyors) at thesis (CCII, DVCC, DDCC, UCC). In the last part the thesis is devoted to the own design of the pseudo-differential filter. Design functionality is verified by experimental simulation.

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4

Sládok, Ondřej. "Diferenční a pseudodiferenční kmitočtové filtry." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-241951.

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This thesis deals with fully differential and pseudo-differential frequency filters. Significant emphasis is placed on the characteristics of common-mode signal. Further, the text deals with the design issue of fully-differential structure and transformation of non-differential to pseudo-differential structures. In the thesis one non-differential structure, one fully-differential and three pseudo-differential structures are proposed, one of them working in current mode. The thesis also describes the analysis from the perspective of non-ideal properties of the active element of two circuit solu

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5

Cardoso, Marcos Vaz. "Síntese de filtros rejeita-faixa de micro-ondas de banda-larga e dupla-banda empregando estruturas periódicas EBG." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-20032012-112022/.

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Esta dissertação de mestrado apresenta um estudo da aplicação de estruturas Electromagnetic Bandgap (EBG) em circuitos planares de micro-ondas, com a proposição de topologias originais de filtros rejeita-faixa de banda ultra-larga e dupla-banda e de uma metodologia de síntese desses filtros. Foi proposta uma metodologia de projeto de filtros EBG, que foi aplicada a um filtro em microlinha de transmissão utilizando duas estruturas EBG simultâneas, com a finalidade de se obter um filtro com banda de rejeição ultra-larga. Esse filtro foi construíd

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6

SOUZA, Márcio Francisco Alves de. "Discriminadores para IFMS de 5 BITS baseados em filtros rejeita-banda em microfita." Universidade Federal de Pernambuco, 2008. https://repositorio.ufpe.br/handle/123456789/24978.

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Submitted by Fernanda Rodrigues de Lima (fernanda.rlima@ufpe.br) on 2018-07-04T20:32:47Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) DISSERTAÇÃO Marcio Francisco Alves de Souza.pdf: 9117283 bytes, checksum: a424671e2699cf987637d3885a709ab9 (MD5)<br>Made available in DSpace on 2018-07-04T20:32:47Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) DISSERTAÇÃO Marcio Francisco Alves de Souza.pdf: 9117283 bytes, checksum: a424671e2699cf987637d3885a709ab9 (MD5) Previous issue date: 2008-09-12<br>C

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7

Fröhlich, Lubomír. "Aktivní kmitočtové filtry pro vyšší frekvence." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233616.

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This thesis deals with the synthesis and optimization of frequency analogue filters with modern active elements usable for higher frequencies. The thesis is divided into three parts, the first part deals with the problematic concerning Leap-Frog combined ARC structure. Due to a difficult design, this method is not described in a detail and used in practice, although it shows e.g. low sensitivity. Firstly, a complete analysis of individual filters was made (for and T endings) and consequently these findings were used during implementation of this method to NAF program. Finally, samples of real

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8

Bin-Melha, Mohammed S. "Design and implementation of band rejected antennas using adaptive surface meshing and genetic algorithms methods. Simulation and measurement of microstrip antennas with the ability of harmonic rejection for wireless and mobile applications including the antenna design optimisation using genetic algorithms." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/6358.

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With the advances in wireless communication systems, antennas with different shapes and design have achieved great demand and are desirable for many uses such as personal communication systems, and other applications involving wireless communication. This has resulted in different shapes and types of antenna design in order to achieve different antenna characteristic. One attractive approach to the design of antennas is to suppress or attenuate harmonic contents due to the non-linear operation of the Radio Frequency (RF) front end. The objectives of this work were to investigate, design and i

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9

Binmelha, Mohammed Saeed. "Design and implementation of band rejected antennas using adaptive surface meshing and genetic algorithms methods : simulation and measurement of microstrip antennas with the ability of harmonic rejection for wireless and mobile applications including the antenna design optimisation using genetic algorithms." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/6358.

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With the advances in wireless communication systems, antennas with different shapes and design have achieved great demand and are desirable for many uses such as personal communication systems, and other applications involving wireless communication. This has resulted in different shapes and types of antenna design in order to achieve different antenna characteristic. One attractive approach to the design of antennas is to suppress or attenuate harmonic contents due to the non-linear operation of the Radio Frequency (RF) front end. The objectives of this work were to investigate, design and im

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10

Turková, Daniela. "Revize systému Jidoka." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229780.

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The goal of this thesis was to devise appropriate improvements for the quality control tool JIDOKA used in Continental Automotive Systems Czech Republic s.r.o based in Frenštát pod Radhoštěm. First, three areas of concern requiring improvement pro-posals were identified. These were: visualization of the maximum amount of rejects, physical handling of rejects and documentation updates. This work comprises an introduction to the issue and the company, application principles of JIDOKA in Continental company and a description of the areas of concern. As a conclusion, solution proposals for given a

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11

Wang, Pei-Yu, and 王培宇. "New Microwave Coplanar-Waveguide Band-Reject Filters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16268251241304353691.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>98<br>The thesis uses the method of defected ground structure (DGS) with the etching of the ground planes of coplanar waveguide (CPW) to design and analyze the unit cell of new band-stop filters. The periodic cascade and cascode structures of the filters are studied also. The band-stop filters have the periodic CPW DGS structures so that the electromagnetic bandgap (EBG) characteristics with the bandpass and bandstop properties in certain frequency bands are obtained. The new band-stop filters are designed and measured in the thesis. The influences of the geometric

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12

Lai, Hung-Yi, and 賴浤毅. "Tunable-Active-Element-OnlyLow-pass, Band-pass and Band-reject Filter Structure." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38066696362375785182.

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碩士<br>中原大學<br>電機工程研究所<br>94<br>Abstract It is worthy of research to do the analogue circuit design using Operational Transconductance Amplifiers (OTAs) and Capacitors (Cs) because an OTA is equivalent to both an active element and a resistor leading to a more condensed integrated circuit without resistors, and because the equivalent resistor value can be electronically tuned varying the bias current. Due to the difficulty to precisely fabricate the capacitance in integrated circuits, it becomes an important research work to find a tunable element for the replacement of the capacitor used

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13

Wu, Chih-Ting, and 吳誌庭. "Tunable OA, tunable OTA-grounded CLow-pass, Band-pass and Band-reject Filter Structure." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/46328316415999909782.

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碩士<br>中原大學<br>電機工程研究所<br>94<br>It is worthy of research to do the analogue circuit design using Operational Transconductance Amplifiers (OTAs) and Capacitors (Cs) because an OTA is equivalent to both an active element and a resistor leading to a more condensed integrated circuit without resistors, and because the equivalent resistor value can be electronically tuned varying the bias current. Due to the difficulty to precisely fabricate the capacitance in integrated circuits, it becomes an important research work to find a tunable element for the replacement of the capacitor used to realize th

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14

Chen, Jian-Zh, and 陳建智. "Design for 60Hz band reject elliptic filter circuit of ECG." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/3amd3x.

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碩士<br>中原大學<br>電機工程研究所<br>99<br>ECG monitoring equipment that picks up feeble body physical signals and the other hand this usually had a great effect upon the accuracy of the output signals by the test environment and equipment.It designs analog filter circuit that points on the accuracy of the output signal. It can be the output signal makes sure to operation at a predetermined frequency range. OTA (Operational Transconductaance Amplifier) is best candidate for analog filter circuit design identified by savants recently. The main character of OTA is Io=Gm(V+-V-), where Io stands for output c

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15

Guo, Zhe-Yu, and 郭哲宇. "OTRA-Based Voltage Mode Low-Pass,Band-Pass, High-Pass, and Band-Reject Biquadratic Filter Structure." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/sdf5wb.

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碩士<br>中原大學<br>電機工程研究所<br>98<br>Abstract This theory realized a voltage-mode second-order Butterworth filter contains low-pass, band-pass, high-pass and notch in the high frequency. In this circuit design, using OTRA to be the main active components that is the dual element of OTA . Operational Trans-Resistance Amplifier (Abbreviation: OTRA) have a Characteristic is virtual grounded at input extremities, it can reduce the parasitic effect for achieve the high accurate output signal. Using node analysis design method, we propose two Operational Trans-Resistance Amplifier and three capacitors, an

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16

Chan, Chen-I., and 詹振義. "Design of a 60Hz Parallel-type Band-reject Elliptic Filter in ECG." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11536723171103643657.

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碩士<br>中原大學<br>電機工程研究所<br>100<br>Abstract The ECG signals are easy to be interfered with by the power noises. The power line interference needs to be minimized in order to obtain a clean ECG signal for accurate diagnosis of a heart condition. This brief discusses a current-mode fourth-order elliptic filter, The goal is to reduce the parasitic effects and to obtain an accurate output signal. The experiment used the Analytical Synthesis Method (ASM) for fourth-order elliptic transfer function to design the circuit. It can reduce circuit node numbers, so the parasitic effects can be reduced. The N

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17

Chen, Yang-Xing, and 陳揚星. "Tunable Active Element-Grounded C Lowpass, Bandpass, Band-reject and Highpass Filter Structure." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/35242840250700203979.

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碩士<br>中原大學<br>電機工程研究所<br>94<br>Abstract It is worthy of research to do the analogue circuit design using Operational Transconductance Amplifiers (OTAs) and Capacitors (Cs) because an OTA is equivalent to both an active element and a resistor leading to a more condensed integrated circuit without resistors, and because the equivalent resistor value can be electronically tuned varying the bias current. Due to the difficulty to precisely fabricate the capacitance in integrated circuits, it becomes an important research work to find a tunable element for the replacement of the capacitor used to

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18

Wu, Jhong-Han, and 吳忠翰. "Band-reject filter using U-H shaped defect ground structure for coplanar waveguide." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/27521653987515262985.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>100<br>In, this thesis, a U-H-shaped coplanar waveguide defect ground structure (CPWDGS) is used for the design of unit cells, periodic structures, and two-dimensional structures of band-reject filters (BRF). The thesis proposes a band-reject filter with U-H-shaped coplanar-waveguide defect ground structure. We utilize electromagnetic bandgap (EBG) and other physical characteristics of the structure to generate the pass and forbidden frequency bands. The physical characteristics of the filter as a function of different physical parameters are discussed and analyzed.

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19

Liao, Chia-Yu, and 廖家毓. "Design of Third-Order and Sixth-Order Band Reject Filters Using DDCC(s) and a Single FDCCII." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6h82bh.

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碩士<br>中原大學<br>電機工程研究所<br>102<br>Abstract In this paper, using Matrix Analysis and Design Method to achieve differential difference current conveyor (DDCC) and a second-generation fully differential current conveyor (FDCCII) to be the active components designed for third-order and six-order band reject filter circuit whose operating frequency of 100kHz, and using HSPICE with TSMC 0.35μm process parameters to circuit simulation and analysis. In this paper, the third-order band reject filter circuit simulation and analysis of the main simulation results with theoretical values close; due to the

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20

Zhu, F., S. Gao, A. T. S. Ho, et al. "Multiple Band-Notched UWB Antenna With Band-Rejected Elements Integrated in the Feed Line." 2013. http://hdl.handle.net/10454/9770.

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No<br>To mitigate potential interferences with coexisting wireless systems operating over 3.3-3.6 GHz, 5.15-5.35 GHz, or 5.725-5.825 GHz bands, four novel band-notched antennas suitable for ultra-wideband (UWB) applications are proposed. These include UWB antennas with a single wide notched band, a single narrow notched band, dual notched bands, and triple notched bands. Each antenna comprises a half-circle shaped patch with an open rectangular slot and a half-circle shaped ground plane. Good band-notched performance is achieved by using high permittivity and low dielectric loss substrate, and

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21

Wu, Yeng-Fu, and 吳彥甫. "Band-Rejected Design of the Printed Monopole Antenna for WLAN / WiMAX System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/14562775018884533313.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>99<br>This thesis proposes a coplanar waveguide feed of a broadband monopole antenna. The proposed antenna structure can meet the requirement for UWB band operation(3.1 GHz~10.6 GHz),and the same time by including a notch function can eliminate the interference of WLAN/WiMAX. The proposed antenna design can meet the requirement for UWB operation(3.1 GHz~10.6 GHz). Furthermore, the proposed antenna can refrain the compact size by including a notch function to eliminate the interference due to co-existence of WLAN/WiMAX bands. The first design to be studied is a

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22

Mohammed, Husham J., Abdulkareem S. Abdullah, R. S. Ali, Raed A. Abd-Alhameed, Yasir I. Abdulraheem, and James M. Noras. "The Design of a Uniplanar Printed Triple Band-Rejected UWB Antenna using Particle Swarm Optimization and the Firefly Algorithm." 2015. http://hdl.handle.net/10454/7601.

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Yes<br>A compact planar monopole antenna is proposed for ultra-wideband applications. The antenna has a microstrip line feed and band-rejected characteristics and consists of a ring patch and partial ground plane with a defective ground structure of rectangular shape. An annular strip is etched above the radiating element and two slots, one C-shaped and one arc-shaped, are embedded in the radiating patch. The proposed antenna has been optimized using bio-inspired algorithms, namely Particle Swarm Optimization and the Firefly Algorithm, based on a new software algorithm (Antenna Optimizer). Mul

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23

Dambaza, Marx. "Credit risk measurement model for small and medium enterprises : the case of Zimbabwe." Thesis, 2020. http://hdl.handle.net/10500/26765.

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Abstracts in English, Zulu and Southern Sotho<br>The advent of Basel II Capital Accord has revolutionised credit risk measurement (CRM) to the extent that the once “perceived riskier bank assets” are now accommodated for lending. The Small and Medium Enterprise (SME) sector has been traditionally perceived as a riskier and unprofitable asset for lending activity by Commercial Banks, in particular. But empirical studies on the implementation of the Basel II internal-ratings-based (IRB) framework have demonstrated that SME credit risk is measurable. Banks are still finding it difficult to foreca

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