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Dissertations / Theses on the topic 'Tunable bandpass filter'

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Published: 4 June 2021

Last updated: 5 February 2022

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1

Terblanche, Phillip. "Electronically adjustable bandpass filter." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17966.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: This thesis presents the study, analysis and design of electronically tunable filters, that can be tuned over a wide frequency range (20-500MHz), for use in a direct sampling receiver. The final design does not have to be a single filter, but may be comprised of a filter bank which enables switching between the filters. The band of interest is too low to use normal transmission lines and lumped elements have to be used. Different topologies that can implement Coupled Resonator filters with lumped elements are investigated

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2

Kaveri, Srinidhi V. "Design of Tunable Edge Coupled Microstrip Bandpass Filters." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/190.

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This thesis is a study of tunability of edge-coupled filters. Microstrip edge-coupled bandpass filters are planar structures and have advantages such as easy design procedures and simple integration into circuits. Three tuning techniques were implemented. The first technique involved the loading of one open end of each coupled into tunable capacitors. The second technique used a tunable resonator in series with the edge-coupled blocks. The final design made use of tunable feedback sections. A detailed mathematical analysis of each design was performed. MATLAB code based on the analyses was wri

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Ramirez, Daniel Alex. "Tunable Combline Filter and Balun: Design, Simulation, and Test." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6629.

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Reconfigurable filters are an attractive solution for many military and commercial applications due to their ability to alter the partitioned frequency band in an RF system without requiring a bank of fixed filters. The onset of this technology has the potential to revolutionize the RF industry by allowing for agile devices which consume less size, weight, and power while providing greater performance. However, at the present state, reconfigurable filters present a reduction in performance when compared to filter banks. This has led to exciting research in the field of RF tunable filters. For

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Rais-Zadeh, Mina. "Wafer-level encapsulated high-performance mems tunable passives and bandpass filters." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29626.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>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.

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Holland, Brian Russell Ramadoss Ramesh. "A tunable coplanar patch antenna, a polymer MEMS based tunable bandpass filter, and a chip-In-polymer packaging technology." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Fall%20Theses/Holland_Brian_3.pdf.

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6

Javaid, Usman. "Modeling of a Tunable Film Bulk Acoustic Resonator and Bandpass Filter Design by using Ferroelectric Film." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9432.

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Filters having smallest size, high power handling capability, high Q factor, operating frequency up to several gigahertz’s (GHz) and low cost are the demand of the market to use in front end wireless/radio communication systems. In this regard several filter technologies have been introduced and utilized commercially. The increasing demand of such type of filters has opened a new challenge for filter designers. The purpose of this thesis is to design of a Tunable Bandpass Filter based on Barium Strontium Titanate (BSTO) Ferroelectric Film. A single Film bulk acoustic resonator (FBAR) is measur

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Prasetiadi, Ananto Eka [Verfasser], Rolf [Akademischer Betreuer] Jakoby, and Michael [Akademischer Betreuer] Höft. "Tunable Substrate Integrated Waveguide Bandpass Filter and Amplitude Tuner Based on Microwave Liquid Crystal Technology / Ananto Eka Prasetiadi ; Rolf Jakoby, Michael Höft." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/114058670X/34.

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El, Mostrah Abbas. "Étude de filtres semi-volumiques pour les charges utiles flexibles des futurs satellites de télécommunications." Brest, 2011. http://www.theses.fr/2011BRES2062.

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Malgré les nombreux services (téléphonie, multimédia,. . . ) offerts par les satellites de télécommunication, les utilisateurs ne se contentent plus de ces services traditionnels et sont en permanence demandeurs de services de qualité répondant à leurs attentes. Il n’est donc pas étonnant qu’apparaisse le besoin de flexibilité au niveau de la charge utile pour permettre au satellite de suivre en vol l’évolution des services. Ce travail de thèse avait pour objet d’étudier l’impact des besoins de flexibilité sur les fonctions de filtrage de la charge utile du satellite. En effet, ce nouveau beso

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Akra, Mirna. "Etude de filtres RF planaires miniatures. Amélioration de la réjection hors-bande et accordabilité." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT024/document.

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Le but de ce travail était de développer des filtres passe-bande RF dans la technologie de PCB, avec trois objectifs principaux. Le premier objectif était de développer des formules de synthèse tosimplify la procédure de conception du filtre. Le deuxième était de parvenir à un rejet wideout bande sans modifier les caractéristiques de la bande de filtrage. Le troisième objectif est de contrôler la fréquence centrale du filtre en utilisant diode varicap<br>The purpose of this work was to develop RF bandpass filters in PCB technology,with three main objectives. The first objective was to develop

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Blais, Sébastien R. "Superstructured Fiber Bragg Gratings and Applications in Microwave Signal Processing." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30358.

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Since their discovery in 1978 by Hill et al. and the development of the transverse holographic technique for their fabrication by Meltz et al. in 1989, fiber Bragg gratings (FBG) have become an important device for applications in optical communications, optical signal processing and fiber-optical sensors. A superstructured fiber Bragg grating (SFBG), also called a sampled fiber Bragg grating, is a special FBG that consists of a several small FBGs placed in close proximity to one another. SFBGs have attracted much attention in recent years with the discovery of techniques allowing the creation

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Al-Mahmoud, Abdulrazzak M. "Microwave passive tunable and active bandpass filters." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309711.

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Wiser, Robert. "Tunable bandpass RF filters for CMOS wireless transmitters /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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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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Lacorte, Caniato Serrano Ariana Maria da Conceição. "Synthesis and design of tunable microwave bandpass filters using planar patch resonators." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT029/document.

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L'objectif de la thèse était la conception et la synthèse de filtres RF passe-bande reconfigurables, basés sur des résonateurs de type “Patch”. Une méthode de conception dédiée à la synthèse des filtres reconfigurables a été développée et appliquée à deux filtres reconfigurables basés sur des « patchs » triangulaire et circulaire. La technique de synthèse repose sur l'analyse de la matrice de couplage, facilitée par une analyse électromagnétique des modes propres des résonateurs « Patch ». Les filtres reconfigurables ont été conçus et optimisés à l'aide de simulations électromagnétiques 3D en

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Conceicao, lacorte c. serrano Ariana maria. "Synthesis and design of tunable microwave bandpass filters using planar patch resonators." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00648414.

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L'objectif de la thèse était la conception et la synthèse de filtres RF passe-bande reconfigurables, basés sur des résonateurs de type "Patch". Une méthode de conception dédiée à la synthèse des filtres reconfigurables a été développée et appliquée à deux filtres reconfigurables basés sur des " patchs " triangulaire et circulaire. La technique de synthèse repose sur l'analyse de la matrice de couplage, facilitée par une analyse électromagnétique des modes propres des résonateurs " Patch ". Les filtres reconfigurables ont été conçus et optimisés à l'aide de simulations électromagnétiques 3D en

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Diedhiou, Daouda Lamine. "Étude de dispositifs hyperfréquences accordables en technologie microfluidique." Phd thesis, Université de Bretagne occidentale - Brest, 2012. http://tel.archives-ouvertes.fr/tel-00857484.

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La multiplication des besoins des utilisateurs dans le domaine des télécommunications a conduit à une surexploitation du spectre de fréquence. Ceci a engendré la raréfaction des bandes de fréquence conduisant à une nécessité de gestion rationnelle des fréquences. Des contraintes ont été rajoutées aux systèmes d'émission / réception et en particulier sur les filtres pour éviter la saturation des services. Dans cette thèse, les travaux s'orientent surtout vers la conception de résonateurs, de filtres planaires et volumiques (3D) accordables dans le domaine des fréquences millimétriques (>= 30 GH

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Sun, Hang Yong, and 孫航永. "A digitally-controlled tunable bandpass filter." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/06991444580322817652.

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Li, Jia-Jiun, and 李佳峻. "THE TUNABLE BANDPASS FILTER USING QUADRATURE MODULATION STRUCTURE." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/20363500296515790897.

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碩士<br>大同大學<br>通訊工程研究所<br>96<br>In this thesis, we will introduce the application of generalized quadrature modulation structure. The focus is discussed and modified the tunable bandpass filter which is obtained by using the principles of quadrature modulation structure. The tunable finite-impulse response (FIR )bandpass filter can be obtained by using the principles of quadrature modulation structure. First, we mention that tunable bandpass filter which is obtained by using the principles of quadrature modulation structure had overlap in pass band. If the prototype filter is a FIR filter with

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Hu, Ruhai, and 胡如海. "Dual-Band Bandpass Filter with Tunable Center Frequencies." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/01743705135440316125.

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碩士<br>國立中央大學<br>電機工程學系<br>103<br>This study mainly introduces the design method and procedure of a type of center-frequency tunable dual-band bandpass filter, and presents the results of fabrication and measurement. This design integrates tunability with dual-band features on a single filter circuit, aiming to miniaturize the circuit area, and provide more flexibility in application. This configuration of proposed filter is based on two-mode stub-loaded open-loop resonators, with each mode resonating at the frequency of the band which to be designed. Tunability is provided by the varactors loa

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Elfergani, Issa T., Abubakar S. Hussaini, Jonathan Rodriguez, P. Marques, and Raed A. Abd-Alhameed. "Tunable RF MEMS bandpass filter with coupled transmission lines." 2015. http://hdl.handle.net/10454/9142.

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Passive and active devices are essential devices in mobile and base stations’ transceiver. Consequently, these devices dominated the large part of the PCB of the today’s transceiver. However, the tomorrow’s mobile terminals without circuit tunability would be extremely large in size to accommodate present and future radio access technologies (RATs). The stand-alone transceiver for one single RAT is comprised of single passive and active devices and adding two or more RATs for the same transceiver would require adding two or more devices, since all of these RATs standards work on different freq

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Fang, Po-sheng, and 方柏勝. "Polarization Independent THz Photonics : Phase Shifter and Tunable Bandpass Filter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/rv674c.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>102<br>In recent years, terahertz (THz) photonics have attracted plenty of attraction due to its remarkable progress. As its potential in the field of communication, spectrum analysis and so on, the demand of high performance quasi-optic components such as phase shifters, band pass filters or polarizers is strongly increasing. However, these devices need polarizer or other polarization control system to achieve polarization independency. The first part of this thesis, polarization independent electrical controlled 2p THz phase shifter with sub-second modulation spe

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CHENG, CHIH-YUAN, and 鄭至淵. "A Tunable Balanced Bandpass Filter With Controllable Common-Mode Suppression." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/16186182348875400065.

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碩士<br>國立臺南大學<br>電機工程學系碩博士班<br>105<br>The main purpose of this thesis is to design a tunable balanced bandpass filter with controllable common-mode suppression, and implement it in printed circuit board. In the first part of this thesis, the basic theory of balanced bandpass filter is discussed. Through the formula derivation, we can convert the scattering parameters of a four-port single-ended network into scattering parameters of a two-port balanced mixed-mode, which can be used to describe the characteristics of differential-mode、common-mode and the mode conversion. The analysis and extracti

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Liu, Kun-Hsing, and 劉坤興. "Analysis and Design of Wide-band Bandpass Filter with Tunable Bandwidth." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/99842714784944497362.

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碩士<br>國立中正大學<br>電機工程所<br>96<br>In this thesis, wideband bandpass filters with fixed and tunable bandwidth are investigated. On the wideband bandpass filter with fixed bandwidth, the generation of wide bandwidth is analyzed based on the odd-even mode theory and the passband insertion loss flatness is enhanced by using input and output impedance compensation circuit. The microwave substrate with the dielectric constant of 3.38, loss tangent of 0.0025, and the thickness of 1.6 mm is used. The measurement result shows that the insertion loss is 0.61 to 0.98 dB and the return loss is greater than 2

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Tsai, Tzung-Ying, and 蔡宗穎. "Compact Tunable 1.7 – 2.7 GHz 2-Pole Tunable Bandpass Filter with Bandwidth and Transmission-Zeros Control." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/buw4f5.

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碩士<br>國立交通大學<br>電信工程研究所<br>103<br>In this thesis, the design method two-pole tunable bandpass filter is presented, with tuning center frequency, bandwidth and transmission zero control. Conventional filter which requires different circuits to realize system in different circumstances, its center frequency and bandwidth require specific similar circuit to realize. Since loading tunable capacitor, it combines all different requirements but similar standard circuits. By the way of improving voltage can change tunable capacitor’s capacitance, can make the center frequency and bandwidth change. It

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Chang, Shih-Chieh, and 張世杰. "Design of Bandpass Filter With Wide Stopband/Tunable Frequency and Mutiband Antenna." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/36524552973276688509.

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碩士<br>國立中正大學<br>電機工程研究所<br>100<br>This paper is divided into three parts. The first part introduce two bandpass filter with wide stopband. By cascading bandstop filter to produce multiple transmission zeros, reaching the effect of wide stopband, and design two various cases by using the feature of bandstop filter. The second part introduce a tunable bandpass filter, which using varactor connected to the end of transmission line to reach the feature of frequency tuning. The third part introduce a multiband antenna. Using CPW-fed by multiple route Structure and impedance matching to design (1.9/

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Huang, Chun-Hao, and 黃俊豪. "Design of Ring-Resonator Bandpass Filter with Tunable center Frequency and Bandwidth." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/99740741815448105434.

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碩士<br>國立中正大學<br>電機工程所<br>97<br>This thesis investigates bandpass filters with respectively tunable center frequency and bandwidths. The tuning capability is generated from the control of varactor reactance on a dual-mode closed-loop resonator, whereas the perturbation intensity of the resonator is changed to separate the even and odd mode’s resonator frequencies. The input and output feeding network must be modified simultaneously to achieve theoretically perfect impedance match. Three tuning functions are accomplished: a) tunable center frequency with a fixed fractional passband width (FBW),

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Lewis, Brian Patrick. "Study of Compact Tunable Filters Using Negative Refractive Index Transmission Lines." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9262.

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Today's microwave circuits, whether for communication, radar, or testing systems, need compact tunable microwave filters. Since different microwave circuit applications have radically different size, power, insertion loss, rejection, vibration, and thermal requirements, new filter technologies with different balances between these requirements are always desirable. Negative Refractive Index (NRI) transmission media was discovered 10 years ago with the unique property of negative phase propagation. A literature review was conducted to identify potential NRI methods for filters and other devi

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Arabi, Eyad A. "Miniaturized and Ferrite Based Tunable Bandpass Filters in LCP and LTCC Technologies for SoP Applications." Diss., 2015. http://hdl.handle.net/10754/552097.

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Wireless systems with emerging applications are leaning towards small size, light-weight and low cost. Another trend for these wireless devices is that new applications and functionalities are being added without increasing the size of the device. To accomplish this, individual components must be miniaturized and the system should be designed to maximize the integration of the individual components. The high level of 3D integration feasible in system on package design (SoP) concept can fulfill the latter requirement. Bandpass filters are important components on all wireless systems to rejec

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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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Lee, Jongwon. "Broadly wavelength-tunable bandpass filters based on long-range surface plasmon-polaritons." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4649.

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Broad spectral tunability is a desired feature of many photonic and plasmonic components, such as optical filters, semiconductor lasers, and plasmonic materials. Here I show that unique properties of long-range surface plasmon polaritons (LR SPP) allow one to produce optical components with very wide tuning range using small variations in the refractive index of the dielectric cladding material. As a proof-of-concept demonstration, I present operation of LR-SPP-based bandpass optical filters in which a 0.004 variation in the refractive index of the cladding dielectric translates into 210 nm of

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Chen, Chih-Chia, and 陳致嘉. "The Design of a Tunable Inductorless CMOS Narrow-Band Bandpass Filter for UHF System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/57130953210952117021.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>95<br>In this thesis, a tunable inductorless CMOS narrow-band bandpass filter at UHF (ultra-high-frequency, 300MHz-3GHz) band is presented. Issues related to active-inductor design and filter design procedure is discussed in detail. The filter is fabricated in 0.18μm CMOS process, measured an insertion loss of 0.1dB, a return loss of 18dB and a 0.51dB in-band ripple with a 436MHz center frequency and 24MHz bandwidth. The filter occupies a chip size of 333 x 653 μm2, with a -27.1dBm input 1dB compression point , a 17.6dB noise figure and a 62.5 mW power consumption.

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Chen, Chih-Chia. "The Design of a Tunable Inductorless CMOS Narrow-Band Bandpass Filter for UHF System." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2007200715353500.

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Jyun-ShuChen and 陳俊樹. "Design of Multi-Band Microstrip Bandpass Filter of Cross-Coupled Structure with Tunable Transmission Zeros." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17111185885160679164.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>98<br>A multi-band microstrip band-pass filter using cross-coupled structure is presented in this paper. We investigated two kinds of multi-band microstrip band-pass filter structures ,including a dual-band filter and a tri-band filter. For the dual-band filter, we implemented the novel dual-band filters based on coupled open loop resonator and uniform impedance ring resonator with cross-coupled structure. The tri-band band-pass filter was referred to a periodic step impedance resonator structure with ring resonator. By using the theory of tri-section step impeda

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Prasetiadi, Ananto Eka. "Tunable Substrate Integrated Waveguide Bandpass Filter and Amplitude Tuner Based on Microwave Liquid Crystal Technology." Phd thesis, 2017. https://tuprints.ulb.tu-darmstadt.de/6803/1/Dissertation-Prasetiadi-New.pdf.

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Tunable microwave devices are needed to fulfill the requirement of the modern wireless systems. In this work, two major devices have been developed: a tunable filter and an amplitude tuner. Specifically synthesized liquid crystals (LC) have been employed as tuning elements for those devices due to their low loss property at frequency bands above 10 GHz, where printed circuit board (PCB) and low temperature co-fired ceramic (LTCC) technologies are employed for the hardware implementation. By inserting the LC inside a filter structure, a tunable filter is obtained, so that the center frequenc

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Tang, Shao-Chan, and 唐紹展. "Extraction of Electric and Magnetic Coupling for Coupled Symmetric Microstrip Resonators Bandpass Filter with Tunable Transmission Zeros." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/78651910225586238376.

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碩士<br>國立交通大學<br>電信工程研究所<br>99<br>A more effective approach is demonstrated for extracting the electric and magnetic coupling components from the coupling coefficient between two coupled symmetric microstrip resonators. It is found that the extraction provides an extra degree of freedom for circuit design. A transmission zero near passband can be created without any cross-coupling scheme but by properly selecting the electrical parameters of the resonators. An equivalent circuit is derived for characterizing the extraction of the coupling and the control of the zero. Moreover, in order to enhan

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Ding, Hsiang-En, and 丁祥恩. "Tunable Hairpin Bandpass Filters Using Varactor Diodes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/29887539318533179241.

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碩士<br>國立交通大學<br>電信工程研究所<br>104<br>The thesis introduces the design methods and the structures of the two types of tunable hairpin bandpass filters using varactor diodes. One is the filter with center-frequency tunable, and the other one is the filter with both bandwidth and center-frequency tunable. Several example circuits are realized and the comparisons between simulated and measured results are given. 　　The center frequency tunable filters are the third order Chebyshev response where the equivalence between J/K inverters and microstrip coupled lines are applied. The varactor diodes at the

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Chen, Yu-Wei, and 陳佑瑋. "Microstrip Bandpass Filters with Harmonic Suppression and Tunable/Non-Tunable Feature." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/15694591516632831414.

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碩士<br>國立彰化師範大學<br>電子工程學系<br>94<br>In this thesis, the author proposed three different bandpass filters (including a diplexer) for wireless LAN and mobile communication systems with good electrical performances. Distinguishing by resonator type, two of them are in the forms of stepped impedance resonators (SIRs) and the rest is in that of parallel-coupled lines (PCL). In the first structure, a novel bandpass filter using a stepped impedance hairpin resonator (SIHR) with the resonant frequency set at 2.45 GHz for ISM band application is reported with the function of harmonic suppression and

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Hong, Jin-Yu, and 洪俊榆. "Tunable Micro Bandpass Filters with Low Driving Voltage." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86648434834035589561.

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碩士<br>國立中興大學<br>機械工程學系所<br>95<br>This study investigates the fabrication of tunable micro bandpass filters using the standard TSMC 0.35μm 2P4M (double polysilicon four metal) CMOS (complementary metal oxide metal semiconductor) process. The micro tunable bandpass filters are tuned by the inductance of the series inductors, which are controlled by p-n junction switches. The driving voltage of the tunable micro bandpass filters is approximately 2V. In addition, its power consumption is less than the type of tunable capacitance filters. When the p-n junction switches are unactuated, the inser

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Lin, Hung-Hsuan. "The Study of Tunable Microwave Bandpass Filters with MEMS Components." 2004. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0707200415214500.

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Lin, Hung-Hsuan, and 林弘萱. "The Study of Tunable Microwave Bandpass Filters with MEMS Components." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/12458919165475506839.

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博士<br>國立臺灣大學<br>應用力學研究所<br>92<br>This research addresses the design and the analysis of MEMS based tunable microwave filters for switching between different satellite navigation standards. In order to precisely switch between these two bands, theories and techniques for filter design are studied and organized. Thin-film lumped realization is our choice for constructing our tunable filter after considering pros and cons of all possible topologies. Mechanical and electrical behaviors of MEMS components are described and analyzed. MEMS switches equipped tunable filters are fabricated, measured, a

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Chao, Tai-Chuan, and 趙泰全. "Design of Tunable Combline Bandpass Filters with Multiple Transmission Zeros." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/67094982641174995076.

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碩士<br>國立中正大學<br>電機工程研究所<br>101<br>This thesis investigates two broadband bandpass filters with tunable center frequency, based on the varactor-loaded combline topology. The first circuit uses uniform-impedance microstrip resonator, and the source-load coupling to creates transmission zeros on both side of passband. The measured performance show that a 50% tuning range from 1.0 GHz to 1.5 GHz is achieved with 1 dB bandwidth of 71 MHz. The insertion loss is 2.2-2.8 dB and the stopband suppression is more than 32 dB. The circuit area is 11.1 mm 15.6 mm, equivalent to . The second circuit uses s

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Miao, Dong-Lin, and 繆東霖. "Design of Tunable Filters Using z-Transform Technique and Induced Bandpass Method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/79631557790990997211.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>98<br>In this thesis, we propose the two design method of tunable filters, one is equal-length two-section stubs and another one is the composite method adopting both the discrete-time domain method and induced passband scheme. We determine the construction of filter and design method according to the frequency response. Finally, we propose the design method that we can implement three types of filters including tunable bandstop/bandpass filter and tunable narrow bandpass filter. Microwave tunable bandstop and bandpass filter design using equal-length transmission

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