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Dissertations / Theses on the topic 'Notch band'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Thomas, James W. "Efficient narrow-band notch filter." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-02022010-020151/.

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2

Dai, L. Barbara. "Design and realization methods for IIR multiple notch filters and high-speed narrow-band and wide-band filters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ56117.pdf.

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3

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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4

O'Brien, Jonathan M. "Design and Modeling of a High-Power Periodic Spiral Antenna with an Integrated Rejection Band Filter." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7431.

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This work details the design and fabrication of an ultra-wideband periodic spiral antenna (PSA) with a notch filter embedded directly into the radiating aperture. Prototype fabrication of the PSA reveals long assembly time due to forming the antenna element, therefore modifications are made to allow fabricating the antenna elements on a thin, flexible, Polyimide substrate. A transmission line model is develop to support the updated configuration of the antenna elements. In addition, a symmetric spurline filter is integrated into the arms of the spiral antenna in order to ad

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5

Zargarzadeh, MohammadReza. "Filter Design for Interference Cancellation for Wide and Narrow Band RF Systems." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81132.

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In radio frequency (RF), filtering is an essential part of RF transceivers. 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 pass filter or rejecting the unwanted part by a band stop filter. Although there has been tremendous effort to design RF tunable filters, there is still lack of designs with frequency and bandwidth software-tuning capability at fr

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6

Kamoun, Leila. "Etude de filtres MMIC hyperfréquences en technologies GaN et AsGa." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0265/document.

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Ces travaux de thèse portent sur l‟étude de filtres « multi-fonctions » dont l‟objectif serait de réduire les dimensions des circuits réalisant les fonctions de filtrage dans les systèmes aéroportés. Ces travaux ont donc conduit à la réalisation de filtres large bande (2 – 18 GHz) réjecteurs développés en technologie MMIC utilisant la filière GaN, ainsi que des filtres large bande développés suivant la filière AsGa en technologie MMIC. Les différents filtres réjecteurs ont été conçus suivant deux principes :- Le premier basé sur une structure à résonateurs à lignes couplées. Les différents pro

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7

Oruc, Sacid. "Electronically Tunable Microwave Bandstop Filter Design And Implementation." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612419/index.pdf.

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In modern broadband microwave applications, receivers are very sensitive to interference signals which can come from the system itself or from hostile emitters. Electronically tunable bandstop filters can be used to eliminate these interference signals with adaptation to changing frequency conditions. In this thesis, electronically tunable bandstop filter design techniques are investigated for microwave frequencies. The aim is to find filter topologies which allow narrowband bandstop or &lsquo<br>notch&rsquo<br>filter designs with low-Q resonators and with tuning capability. Tunability will be

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Papantonis, Dimitrios Papantonis. "Tightly-Coupled Arrays with Reconfigurable Bandwidth." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503046689468305.

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9

Ciomber, Isabelle, and Roland Jakel. "Systematic Analysis and Comparison of Stress Minimizing Notch Shapes : Obtaining a stress concentration factor of Kt=1 without FEM-Code." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-141533.

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Als Stand der Technik sind einfache, kreisförmige Verrundungen zur Reduktion von Kerbspannungen an Querschnittsübergängen bekannt, für die aus Tabellenwerken / Diagrammen in der Literatur die Formzahl einfach abgelesen werden kann. Die Effizienz der Spannungsreduktion solcher Lösungen ist jedoch sehr begrenzt. Ziel der Arbeit ist es daher, dem Konstrukteur bzw. Berechnungsingenieur ein Verfahren in die Hand zu geben, mit dem er für Standardquerschnittsübergänge und Standardlastfälle "Nicht-Kreiskerben" ohne teure und zeitaufwendige FEM-Analyse einfach durch Nutzung geeigneter Formzahldiagramme

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10

Kuo, Chi-Ren, and 郭啟仁. "Dual-band notch antennas and printed diversity antennas." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/91648104178536739648.

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碩士<br>國立交通大學<br>電信工程系<br>89<br>The thesis aims at developing an innovative dual-band antenna structure with simple fabrication and excellent performances, named “ dual-band notch antenna.” Major port of dual-band applications in antenna design is based on the extensions of patch antenna. The merits of applying patch antennas to dual-band applications include promoting or lowering the frequency ratio for specific utilizations, enhancing impedance bandwidth and miniaturizing dimensions. However, utilizing patch antenna as a basis of dual-band antennas involves complexities in feedline network an

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11

Huang, Meng-Chieh, and 黃盟傑. "Design of UWB Antenna with Band-Notch Filter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/54797818756512072791.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>96<br>The purpose of this thesis is to design antennas and filters which can be used in UWB wireless communication system. In this thesis, planar antennas and filters are investigated and verified for UWB. A novel CPW ultra-wideband (UWB) antenna combined with a compact band-pass filter is proposed. The proposed antenna with band-notch function is to use embedded resonance cell. The band-notch antenna satisfies the return loss requirement of less than -10 dB over the frequency range of 3.1 to 10.6 GHz with a rejection band around 5.34 to 5.97 GHz. The proposed UW

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12

Hsu, Pei-Hsiang, and 徐培翔. "Dual-band LNA with notch filter for WLAN and WiMAX." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/41610311773190299481.

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碩士<br>國立交通大學<br>電機學院碩士在職專班電子與光電組<br>97<br>Because of the advances of wireless communications in recent years, utilization of radio frequency bands has become more and more frequent. As a result, some issues arise gradually, especially the problem of signal interference. Therefore, it is necessary to avoid loss of system sensitivity to interferences by careful receiver front-end circuitry design. Usually band-pass filter (BPF) is used in receiver front-end to suppress interfering signal strength. Also, LNA provides gain control to avoid loss of sensitivity due to interferences. For multi-band

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13

Chen, Yen-jen, and 陳彥仁. "Direct Synthesis of Multi-Band Bandstop Filters Using Multiple Notch Filters." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/s33sm8.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>94<br>A synthesis method of bandstop filters using discrete-time domain technique is presented. By decomposing the discrete -time prototype of Chebyshev type II filter into the factorized terms, a transmission line shunted with a two-section shunt -open stub is developed to implement the notch filter. A cascade connection of serial lines shunted with multiple two-section shunt-open stubs is employed to emulate the bandstop filter. Both single-band and dual-band bandstop filters are implemented to illustrate the validity of this design method. We can use multiple notc

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14

Elfergani, Issa T., Abubakar S. Hussaini, Chan H. See, et al. "Printed monopole antenna with tunable band-notched characteristic for use in mobile and ultra-wide band applications." 2015. http://hdl.handle.net/10454/8535.

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Yes<br>A tunable band-notch printed monopole antenna is presented, exhibiting a wide impedance bandwidth from 1.5 to 5.5 GHz with good impedance matching (VSWR ≤ 2) and a tunable rejected frequency band from 2.38 to 3.87 GHz. The band-notching is achieved by adding an inner chorded crescent element within a driven element of a similar shape. By varying the value of the varactor which is placed between the inner and outer arcs, the desired variable rejected can be obtained. Simulated and measured results show wide impedance bandwidth with a tunable band notch, stable radiation patterns, and co

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15

HSIA, WEI-CHUN, and 夏偉鈞. "Studies of planar ultra wideband antenna having a frequency band notch function." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/92162592305384296705.

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碩士<br>國立高雄師範大學<br>物理學系<br>93<br>Novel designs of planar ultra wideband antenna with a frequency band notch function have been investigated in the thesis. As the era of digitization will come, it is indispensable that the generous and fast materials are conveyed. In order to solve the problem of the traditional narrow band, there is a tendency towards ultra wide-band technology. The UWB technology will cause the interference issue of narrow band communication system. We will propose an ideal to solve this problem from antenna aspect in the thesis. We can easily to remove the unwanted bandwidth

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16

洪崇育. "Design of Novel Ultra-wideband (UWB) Planar Antennas With Band-Notch Function." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/59680161547090415303.

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碩士<br>國立交通大學<br>電信工程系所<br>94<br>In this thesis two novel ultra wide-band planar printed antennas have been designed. An introduction begins with a printed monopole antenna with arc-edged structure. The concept of designing this antenna, which makes it different from the traditional monopole antenna, is to modify its shape of ground plane. This design causes its return loss lower than – 10 dB at 3GHz ~ 10.6GHz frequency range and the radiation pattern within this range is highly similar to the monopole antenna. The second ultra wide-band antenna is based on the first planar monopole antenna. U

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17

Lin, Yi-cong, and 林宜聰. "Dual band-notch Trapezoid CPW-fed monopole antenna for WiMAX(2-11GHz) application." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/92271644187080599544.

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碩士<br>國立臺南大學<br>通訊工程研究所碩士班<br>98<br>A new dual band-notch (2.4–2.5 GHz and 5–6 GHz) dual trapezoid coplanar waveguide (CPW-fed) monopole antenna is proposed and investigated experimentally. This antenna utilizes the coplanar waveguide line to simplify the antenna principal part and ground plane into a single metallic patch. The two trapezoid modes of the proposed antenna are associated with various lengths of two monopoles, The designed antenna operates over 2–11 GHz for VSWR &lt; 2 including the wireless local area network (WLAN) band notched at the vicinity of 5.2 GHz and (ISM) industria

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18

Liu, Chen-Zheng, and 劉昌正. "Study of Multi-Elliptical Stacked Shaped UWB Mircostip Antenna with Dual Band-Notch Characterisitic." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/50446836061096237894.

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碩士<br>中華科技大學<br>飛機系統工程研究所<br>98<br>In this thesis, four types of novel UWB(Ultra-Wideband) antenna are designed and implement. The first type is a multi-elliptical stacked shaped UWB microstrip antenna. The radiator configuration is comprised of eight stacked elliptical, and it was fed by taper microstrip line, the measured S11＜-10dB operation frequency band is 1.93GHz -11GHz and its impedance bandwidth ratio is 140%, the peak gain of antenna is 4.45dBi and as well as omnidirectional radiation patterns. This antenna can be used in UWB and bluetooth band. The second type is multi-elliptical st

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19

Tsai, Po-Yao, and 蔡柏瑤. "Design of CMOS Tunable Band-notch Low-noise Amplifier for DS-UWB Wireless RF Receiver." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/03099838609941591656.

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碩士<br>國立交通大學<br>電機學院碩士在職專班電信組<br>97<br>This thesis discusses the design and analysis of a band notch low-noise amplifier applied in the receiver of DS-UWB. The design in this thesis is based on a finished circuit “Notch LNA” and then makes it tunable in virtue of the adding varactor. The signal within the operation band of UWB (3.1 ~ 10.6GHz), includes not only the signal of DS-UWB but the WLAN signal of IEEE 802.11a (5~ 6GHz). These undesired signals will cause inter-modulation and hence interfere with the signal of DS-UWB. Thus, the operation band of DS-UWB doesn’t include 5~6 GHz to prevent

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20

Chen, Wei-Jei, and 陳暐傑. "UWB Antenna Using Slot-Type Split Ring Resonators and L Slot Notch Dual Band a Study." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/15409959498346481581.

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碩士<br>龍華科技大學<br>電子工程系碩士班<br>104<br>The new configuration of ultra-wideband (UWB) monopole antennas design for ultra wideband (UWB) applications is proposed. These antennas are designed on PCB FR4 substrate with relative permittivity εr=4.4, loss tangent tanδ=0.0245, and thickness h=1.6mm. By adjusting the different parameters, simulated and experimental results of the antenna are suitable for UWB operations. With adjusting the size and the position of two slot-type SRRs on the ground plane and two L-shaped slots on conducting patches, the UWB antennas produce two band-notched filters and dec

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21

Yu, Chih-Chieh, and 游智傑. "Biquadratic current-mode band-pass, notch, and all-pass filter employing a single second-generation current conveyor." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/93890957397373038489.

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碩士<br>中原大學<br>電機工程研究所<br>104<br>This paper adopts single CCII(Second-generation Current Conveyor) is an active element , used four resistors and two grounded capacitors among cascades of one resistor and one capacitor especially, In this paper, design CCII(Second-generation Current Conveyor)using one input and one output filter, to achieve full(All-pass)filter signal丶bandpass(Band-Pass) filter signals丶Notch filter signals. In this paper, after the most simplified circuit design as the goal, and the use of nodal analysis method to complete its matrix of relationships in the use of Cramer’s rul

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22

Chen, Huan Neng, and 陳煥能. "Design and Implementation of a Band-Notch Ultra-wideband LNA with Band Shaping Capability and a 2.5-11GHz Active Matching Ultra-wideband Low Noise Amplifier." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/93093459745113932524.

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碩士<br>國立交通大學<br>電信工程系所<br>94<br>This thesis describes the design and analysis of low-noise amplifier for UWB system. The features of the UWB LNA are wide bandwidth and flatness of gain. The first part studies on a band-notch ultra-wideband LNA with band shaping capability.For a start , the measured performances of a LC resonance matching ultra-wideband LNA are as follow: The bandwidth of the LNA is ranged from 3 GHz to 10 GHz. The gain is 5 dB ± 2 dB. The input return loss is below -4dB. The output return loss is below -8.5dB . The power consumption is 16.2 mW. The simulation performances of

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23

Yu, Hsiang-Yi, and 游祥益. "Design of the Low-pass、Band-pass and Notch Filter Structures using Adjustable Active elements and a Single Grounded Capacitor." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/51168648926000862417.

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碩士<br>中原大學<br>電機工程研究所<br>94<br>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 the s terms in transfer function. The input-and-output relationship of an Operational Amplifier (OA) is show as below. In which A0 is the gain, ω0 the bandwidth, and B0 the product of both gain and bandwidth. It is exhibited that an OA can also be used to realize the s terms in transfer functions. We have found that the B0 is variable tuning either the bias curren

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24

Chang, Ching-Lung, and 張景隆. "Non-ideal Effect and Improvement of the Voltage-Mode High-Frequency OTA-C Low-pass、High-pass、Band-pass and Notch Biquad Filters with the Minimum Components." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/54409509967876425937.

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碩士<br>中原大學<br>電機工程研究所<br>95<br>There are several kinds of parasitic capacitances, including input and output parasitic capacitances of an OTA and the nodal parasitic capacitance at the internal node in an OTA-C (Operational Transconductance Amplifier and Capacitor) circuit. This leads to the difficulty to have the same places for both given capacitors and all the parasitic capacitances. When the differential-input OTA and floating capacitances are employed in the circuit structure, and the impossibility to obtain a high–frequency circuit with precise output responses by giving a proper capacit

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25

Chang, shu-Wei, and 張書瑋. "Tri-notch Bands Mushroom-like Structure With UWB Application." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/84415548597819763665.

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碩士<br>國立交通大學<br>電信工程研究所<br>100<br>In this thesis, a tri-notch (rejection) bands mushroom-like structure is designed and fabricated. By utilizing the characteristic of bandstop of mushroom-like structure, a tri-notch bands (TNB) bandstop resonator (BSR) with high selectivity and rejection level is realized by three etched square ring slots and numerous embedded vias on the metallic patch of mushroom to eliminate the interference of radio frequencies, such as WiMAX bands and some satellite communication system. Moreover, since the TNB BSR provides flexible and independent current paths to posses

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26

Kaiser, Ramona. "Auditory frequency processing during wakefulness and sleep." Thèse, 2017. http://hdl.handle.net/1866/21159.

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