Academic literature on the topic 'Multi-band microwave filters'
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Journal articles on the topic "Multi-band microwave filters"
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Gomez-Garcia, Roberto, and Andrew C. Guyette. "Reconfigurable Multi-Band Microwave Filters." IEEE Transactions on Microwave Theory and Techniques 63, no. 4 (April 2015): 1294–307. http://dx.doi.org/10.1109/tmtt.2015.2405066.
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Sazali, M. A., N. A. Shairi, and Z. Zakaria. "Hybrid Microstrip Diplexer Design for Multi-band WiMAX Application in 2.3 and 3.5 GHz Bands." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 1 (February 1, 2018): 576. http://dx.doi.org/10.11591/ijece.v8i1.pp576-584.
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In this paper, a design of hybrid microstrip diplexer is proposed for multi-band Worldwide Interoperability for Microwave Access (WiMAX) application in 2.3 and 3.5 GHz bands. The diplexer consists of a combination of two different filter designs. These filters were designed based on microstripline coupling techniques in order to obtain minimum insertion losses and achieve the desired frequency bandwidth. Therefore, a coupled open loop ring resonator was chosen for the filter design in 2.3 GHz band and a folded coupled line resonator was chosen for the filter design in 3.5 GHz band. Then, these filters were combined with a ring manifold matching network to be a hybrid microstrip diplexer. Based on the results, good agreements were achieved between the simulation and measurement results in terms of insertion loss, return loss and bandwidth in the 2.3 and 3.5 GHz bands.
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Mrvic, Marija, Snezana Stefanovski-Pajovic, Milka Potrebic, and Dejan Tosic. "Design of microwave waveguide filters with effects of fabrication imperfections." Facta universitatis - series: Electronics and Energetics 30, no. 4 (2017): 431–58. http://dx.doi.org/10.2298/fuee1704431m.
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This paper presents results of a study on a bandpass and bandstop waveguide filter design using printed-circuit discontinuities, representing resonating elements. These inserts may be implemented using relatively simple types of resonators, and the amplitude response may be controlled by tuning the parameters of the resonators. The proper layout of the resonators on the insert may lead to a single or multiple resonant frequencies, using single resonating insert. The inserts may be placed in the E-plane or the H-plane of the standard rectangular waveguide. Various solutions using quarter-wave resonators and split-ring resonators for bandstop filters, and complementary split-ring resonators for bandpass filters are proposed, including multi-band filters and compact filters. They are designed to operate in the X-frequency band and standard rectangular waveguide (WR-90) is used. Besides three dimensional electromagnetic models and equivalent microwave circuits, experimental results are also provided to verify proposed design. Another aspect of the research represents a study of imperfections demonstrated on a bandpass waveguide filter. Fabrication side effects and implementation imperfections are analyzed in details, providing relevant results regarding the most critical parameters affecting filter performance. The analysis is primarily based on software simulations, to shorten and improve design procedure. However, measurement results represent additional contribution to validate the approach and confirm conclusions regarding crucial phenomena affecting filter response.
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Ashley, Andrea, Dakotah J. Simpson, and Dimitra Psychogiou. "Quasi-elliptic dual-band bandpass filters based on series-cascaded multi-resonant cells." International Journal of Microwave and Wireless Technologies 12, no. 7 (June 22, 2020): 609–14. http://dx.doi.org/10.1017/s1759078720000756.
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AbstractThis paper reports on quasi-elliptic dual-band bandpass filters (BPFs) that were designed for the Filter Student Design Competition of the 2019 European Microwave Week. The proposed lumped-element (LE) BPF concept is based on two dual-band transversal cells and one multi-resonant cell that allow the realization of symmetric and asymmetric dual-band transfer functions shaped by six poles and five transmission zeros. A compact implementation scheme based on LE series resonators is proposed for size compactness and wide spurious free out-of-band response. For proof-of-concept demonstration purposes, a dual-band LE prototype with two passbands centered 1 and 1.5 GHz was designed, manufactured, and measured. It exhibited the following radio frequency measured performance characteristics. Passbands centered at 1.02 and 1.45 GHz, minimum insertion loss levels of 2.0 and 2.7 dB, and bandwidth of 146 and 105 MHz, respectively, for the first and the second passband, and out-of-band rejection >30 dB between 0 and 894 MHz, 1.17–1.34 GHz, and 1.72–6.9 GHz.
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CASSINESE, A., A. ANDREONE, P. ORGIANI, F. PALOMBA, G. PICA, R. VAGLIO, G. PANARIELLO, F. SCHETTINO, M. CIRILLO, and R. RUSSO. "HIGH POWER HANDLING SUPERCONDUCTING PLANAR FILTERS FOR TELECOMMUNICATION APPLICATIONS." International Journal of Modern Physics B 14, no. 25n27 (October 30, 2000): 3092–97. http://dx.doi.org/10.1142/s0217979200003368.
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Passive microwave filters based on HTS films are very promising for telecommunication applications. We report on the design, obtained using a commercial 2.5D software, and the realization of filters, fabricated with double sided YBCO films grown on LaAlO 3 substrates, for both receiving and transmission systems. For the receiving side, planar multi-pole interdigital L-band filters with 75 MHz transmission bandwidths have been fabricated on 2" substrates. Up to 80 K this kind of filter, based on a Tchebischev response, shows an insertion loss lower than 0.5 dB with a ripple of 0.3 dB for a maximum input power of 2 Watts. For the transmitting side, dual-mode filters represent one of the main interesting configuration to exploit since they can combine a high power handling capability with miniaturization requirements. A novel kind of dual-mode C-band filter based on cross slotted square resonators is presented. The novelty of the proposed structure is to use a pair of unequal crossed slots that are formed on a square patch resonator such that its structure size can be significantly reduced. A prototypal device operating at 3.7 GHz is fabricated with different type of couplings on 10 × 10 mm 2 LaAlO 3 substrate to showcase our proposal. The behavior of the filter as a function of the input power has been tested up to 2 Watts limited by the amplified power supply.
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Hsue, C. W., J. W. Hsu, C. H. Lu, and S. T. Peng. "Design and implementation of microwave multi-band/multi-level filters using equal-length transmission lines and Yule–Walker scheme." IET Microwaves, Antennas & Propagation 3, no. 5 (2009): 826. http://dx.doi.org/10.1049/iet-map.2008.0231.
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Mitkov, A. S., A. A. Stolyarenko, and M. G. Rubanovich. "FILM ATTENUATORS BASED ON FILTER STRUCTURES WITH DISSIPATIVE LOSSES." Issues of radio electronics, no. 4 (May 10, 2019): 84–89. http://dx.doi.org/10.21778/2218-5453-2019-4-84-89.
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The article presents the results of a study of the frequency properties of a multi-stage high-power attenuator with attenuation of 10 dB in the frequency range 0–3 GHz, obtained on a dielectric substrate made of beryllium ceramics. For its construction, microstrip filters with quarter-wave couplings and dissipative losses are used, as well as additional film resistors made in the form of trapezoidal plumes. These loops have a minimum size in the area of a short circuit. The design features of wide-band microwave attenuators of high power are determined, including the conditions for ensuring uniform distribution of the dissipated microwave power and distribution of the resonant frequencies of low-Q resonators. Equivalent circuits were compiled, which allow to determine the initial structure of the attenuator and optimize its frequency characteristics for any power level.
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Sagues, Mikel, Raimundo García Olcina, Alayn Loayssa, Salvador Sales, and José Capmany. "Multi-tap complex-coefficient incoherent microwave photonic filters based on optical single-sideband modulation and narrow band optical filtering." Optics Express 16, no. 1 (2008): 295. http://dx.doi.org/10.1364/oe.16.000295.
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Goudos, Sotirios K., Zaharias D. Zaharis, and Traianos Yioultsis. "APPLICATION OF A DIFFERENTIAL EVOLUTION ALGORITHM WITH STRATEGY ADAPTATION TO THE DESIGN OF MULTI-BAND MICROWAVE FILTERS FOR WIRELESS COMMUNICATIONS." Progress In Electromagnetics Research 109 (2010): 123–37. http://dx.doi.org/10.2528/pier10081704.
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Sorrentino, Roberto, Paola Farinelli, Alessandro Cazzorla, and Luca Pelliccia. "RF-MEMS Application to RF Tuneable Circuits." Advances in Science and Technology 100 (October 2016): 100–108. http://dx.doi.org/10.4028/www.scientific.net/ast.100.100.
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The bursting wireless communication market, including 5G, advanced satellite communication systems and COTM (Communication On The Move) terminals, require ever more sophisticated functions, from multi-band and multi-function operations to electronically steerable and reconfigurable antennas, pushing technological developments towards the use of tunable microwave components and circuits. Reconfigurability allows indeed for reduced complexity and cost of the apparatuses. In this context, RF MEMS (Micro-Electro-Mechanical-Systems) technology has emerged as a very attractive solution to realize both tunable devices (e.g. variable capacitors, inductors and micro-relays), as well as complex circuits (e.g. tunable filters, reconfigurable matching networks and reconfigurable beam forming networks for phased array antennas). High linearity, low loss and high miniaturization are the typical advantages of RF MEMS over conventional technologies. Micromechanical components fabricated via IC-compatible MEMS technologies and capable of low-loss filtering, switching and frequency generation allow for miniaturized wireless front-ends via higher levels of integration. In addition, the inherent high linearity of the MEMS switches enables carrier aggregations without introducing intermodulation distortions. This paper will review the recent advances in the development of the RF MEMS to RF tunable circuits and systems.
Dissertations / Theses on the topic "Multi-band microwave filters"
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Nikolina, Janković. "Mikrotalasni filtri sa više nezavisno kontrolisanih propusnih opsega realizovani u mikrostrip arhitekturi." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2013. https://www.cris.uns.ac.rs/record.jsf?recordId=83681&source=NDLTD&language=en.
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Filtri predstavljaju nezaobilazan deo svakog mikrotalasnog uređaja. Skorašnji veoma brz razvoj bežičnih sistema pred mikrotalasne filtre postavlja nove zahteve kao što su visoke performanse, kompaktnost i rad na više proizvoljno odabranih učestanosti koje se mogu nezavisno kontrolisati.Naučni doprinos ove doktorske disertacije predstavlja pet novih konfiguracija mikrotalasnih multi-band filtara koji su realizovani u mikrostrip arhitekturi. Od toga tri konfiguracije predstavljaju dual-band filtre, a preostale dve konfiguracije tri-band filtre. Filtri su realizovani korišćenjem fraktalnih krivih i/ili savijenih λ/4 rezonatora, i to u klasičnoj tehnologiji štampanih ploča i u višeslojnoj tehnologiji nisko-temperaturne zajedno pečene keramike.Detaljno je analiziran i opisan način rada predloženih filtara. Filtri su fabrikovani, a njihove performanse izmerene i upoređene sa drugim rezultatima dostupnim u literaturi. Pokazano je da predložene filtre karakteriše mogućnost nezavisne kontrole propusnih opsega što je iskorišćeno za realizaciju dual-band filtara koji rade na WLAN 2.4/3.5 GHz opsezima i tri-band filtara koji rade na WLAN 2.4/3.5/5.2 GHz opsezima. Štaviše, predložene tri-band strukture predstavljaju najmanje tri-band filtre do danas predložene u literaturi.Filters are indispensable components in any microwave device. Recent rapid development of wireless systems posed new demands to microwave filters, such as high performance, compact size and the ability to simultaneously operate on several independently selected frequencies.Scientific contribution of this dissertation are five novel microwave multi-band filters realized in microstrip architecture. Out of the five, three configurations are dual-band filters, while the remaining two are tri-band filters. Filters are designed using fractal curves and/or folded λ/4 resonators, in the conventional printed circuits technology or in low-temperature cofired ceramics technology.Operating principles of the proposed filters have been analyzed and explained in detail. Their performances have been measured and compared to other recently published results. It has been shown that the proposed filters allow independent control of the passbands. This has been used to design dual-band filters operating at WLAN frequencies of 2.4/3.5 GHz and tri-band filters operating at WLAN frequencies of 2.4/3.5/5.2 GHz. Moreover, the proposed tri-band filters are the most compact tri-band filters published so far.
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Melgarejo, Lermas Juan Carlos. "Advanced Techniques for the Design and Optimization of Multi-Band and Reconfigurable Microwave Waveguide Filters." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/172728.
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[ES] El creciente número de dispositivos intercambiando datos ha empujado a las empresas del sector espacial a utilizar bandas de frecuencia cada vez más altas, como Ku, K y Ka, ya que permiten emplear canales de frecuencia más anchos. A medida que disminuye la longitud de onda, el tamaño de los filtros se reduce y, por tanto, son más sensibles a las desviaciones de fabricación. Para compensar estos errores, es necesario emplear elementos de sintonía en la etapa de diseño.
En este contexto presentamos una estrategia de diseño que permite incluir todos los factores no ideales, como elementos de sintonía o esquinas redondeadas, en las simulaciones finales de filtros y multiplexores.
Una vez se han fabricado los filtros es necesario ajustar manualmente los elementos de sintonía hasta recuperar la respuesta objetivo. Sin embargo, para realizar esta tarea con éxito es necesario tener mucha experiencia previa y, aún así, conlleva un tiempo considerable. Por tanto, también proponemos un procedimiento de sintonización eficiente y sistemático que permite a cualquier persona, independientemente de su experiencia previa en sintonización, realizar esta tarea con éxito.
Además del aumento de las tasas de transmisión, otros desafíos del sector espacial son reducir el tamaño y peso de sus componentes, así como dotarlos de capacidad dereconfiguración. Emplear dispositivos multifunción como filtros multibanda o dispositivos reconfigurables es una posible solución. En este contexto, proponemos una nueva familia de filtros multibanda en guía de ondas que puede adaptarse a las futuras necesidades del sector espacial. Con el mismo objetivo, también proponemos una familia de dispositivos reconfigurables de varios estados discretos que pueden modificar su comportamiento de forma remota.[CA] El creixent nombre de dispositius intercanviant dades ha empés a les empreses del sector espacial a utilitzar bandes de freqüència cada vegada més altes, com Ku, K i Ka, ja que permeten fer servir canals de freqüència més amples. A mesura que la longitud d'ona disminueix, la mida dels filtres es redueix i, per tant, són més sensibles a les desviacions de fabricació. Per compensar aquests errors, és necessari fer servir elements de sintonia en l'etapa de disseny. En aquest context presentem una estratègia de disseny que permet incloure tots els factors no ideals, com a elements de sintonia o cantonades arrodonides, en les simulacions finals de filtres i multiplexors. Una vegada s'han fabricat els filtres és necessari ajustar manualment els elements de sintonia fins a recuperar la resposta objectiu. Però, per realitzar aquesta tasca amb èxit és necessari tenir molta experiència prèvia i, així i tot, comporta un temps considerable. Per tant, també proposem un procediment de sintonització eficient i sistemàtic que permet a qualsevol persona, independentment de la seua experiència prèvia en sintonització, realitzar aquesta tasca amb èxit. A més de l'augment de les taxes de transmissió, altres desafiaments de el sector espacial són reduir la mida i pes dels seus components, així com dotar-los de capacitat de reconfiguració. Emprar dispositius multifunció com filtres multibanda o dispositius reconfigurables és una possible solució. En aquest context, proposem una nova família de filtres multibanda en guia d'ones que pot adaptar-se a les futures necessitats del sector espacial. Amb el mateix objectiu, també proposem una família de dispositius reconfigurables de diversos estats discrets que poden modificar el seu comportament de forma remota.
[EN] The need for ever increasing data rate of modern communication systems has motivated companies in the space sector to exploit higher frequency bands, such as Ku, K and Ka, in order to offer wider bandwidths to their customers. However, as the frequency increases, the wavelength decreases, and all waveguide hardware becomes smaller and more sensitive to deviations from the ideal dimensions that normally occur when manufacturing the devices. In order to compensate for these deviations (or errors), tuning elements must then be added to the hardware and included in the design process. In this context, therefore, we focus on the investigation of novel design strategies for filters and multiplexers with the objective of including all necessary non-ideal factors in the design process. It is important to note in this context that, once the filters are manufactured, the tuning elements are usually adjusted manually until the desired target performance has been achieved. However, successfully performing this task requires a considerable amount of time and very significant previous experience in tuning microwave filters. Consequently, an additional goal of our research work is to propose efficient and systematic tuning procedures so that anyone, regardless of their previous tuning experience, can successfully perform this difficult task. In addition to the increasing data rates, another current challenge of advanced communication systems is the ability to be reconfigured remotely to adjust to changes in costumer demands. The use of multi-function or reconfigurable devices is then an attractive possible solution. In this context, therefore, we also investigate new families of multi-band waveguide filters that can be used to accommodate several pass bands in the same filtering device. Furthermore, we also propose a new family of reconfigurable devices with several discrete states that can be easily controlled remotely.
Melgarejo Lermas, JC. (2021). Advanced Techniques for the Design and Optimization of Multi-Band and Reconfigurable Microwave Waveguide Filters [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/172728
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Genc, Alper. "Metamaterial-Inspired Miniaturized Multi-Band Microwave Filters and Power Dividers." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/700.
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Integration of more communication standards in one microwave wireless device created a demand on developing compact, low-cost, and robust multi-band microwave components.
This dissertation presents three studies for designing miniaturized and multi-band circuits that can be used for multi-band radio frequency (RF) front-ends. These three studies are the design of dual-band and tunable bandpass filters as well as dual- and triple-band equal-split power dividers/combiners. The dual-band filter is based on split ring resonators and double slit complemantary split ring resonators. A dual-band prototype three-stage Chebyshev filter, with a fractional bandwidth of 2% at 0.9 GHz and a fractional bandwidth of 3% at 1.3 GHz with equal-ripple of 0.4 dB at both passbands, is presented. The overall size of the dual-band filter is three times smaller compared to edge-coupled microstrip filters. Good out-of-band signal rejection (< 38 dB) and insertion losses (< 4.9 dB for the lower passband and <2.7 dB for the upper passband) are achieved. The proposed tunable filter is designed from varactor loaded split ring resonators. The size of the tunable filter is reduced by a factor of 3.5 compared to quarter wavelength-based coupled line filters.The power divider is based on composite right- and left-handed transmission lines. Dual-band and triple-band power divider prototypes are designed, fabricated, and tested. The passbands of the triple-band Wilkinson power divider are centered at 0.8 GHz, 1.3 GHz, and 1.85 GHz, and the passbands of the dual-band Wilkinson power divider are centered at 0.7 GHz, 1.5 GHz. The triple-band divider has a length of 0.66 wavelength in the substrate and its size is reduced to 3/4 of right-handed transmission line-based Wilkinson power dividers. The dual-band power divider has wide fractional bandwidths ( 20% at the lower passband and 41% at the upper passband). Excellent input matchings (input return losses < 29 dB), output matchings (output return losses < 23 dB), and output port isolations (< 24 dB) are achieved at all passbands of the power dividers. The proposed filters and power dividers are compact and low-cost, and are promising candidates for the miniaturization and cost-reduction of multi-band microwave wireless system.
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Gupta, Saurabh. "Miniature Printed Antennas and Filters Using Volumetric Reactive Pins and Lumped Circuit Loadings." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5369.
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This dissertation presents a new technique for miniaturization of printed RF circuits and antennas. The technique is based on lumped circuit elements and volumetric reactive pin loadings. The vertical arrangement of the pins is shown to provide a meandered current path within the device volume enhancing the miniaturization achieved with sole application of lumped circuit components. The technique is applied for antenna and filter size reduction. In antenna applications, it is shown that due to the presence of the reactive pin loading the overall size of a printed antenna can be miniaturized without affecting the radiation efficiency performance. One of the major advantages of this approach over the existing miniaturization techniques is that it allows reducing the overall size of the antenna (i.e. the substrate size) in addition to its metallization footprint area. Specifically, three antenna designs are presented for GPS and ISM applications. Firstly, a miniaturized wide-band CDL antenna has been introduced. The antenna consists of two loops which are loaded with lumped inductors and coupling capacitors. The design is shown to exhibits 49% smaller footprint size as compared to a traditional patch antenna without degrading the bandwidth performance. Secondly, a circular polarized compact dual-band CDL GPS antenna loaded with lumped capacitors and vertical pins is shown. The antenna operates with >50% lesser area as compared to a traditional L2 patch antenna without degrading its radiation performance. Thirdly, a patch antenna with its cavity loaded with CSRRs is presented. The novelty of the design is that it provides circularly symmetric arrangement of CSRRs thereby enabling the antenna to exhibit circular polarization (CP). Apart from CSRR, further size reduction is obtained by simultaneously reducing the substrate size and ground plane metallization around the CSRRs and loading it with pins. The antenna is 44% smaller than a traditional patch antenna without causing degradation in the antenna's radiation efficiency performance. To extend the volumetric loading to filter applications, the last chapter of the dissertation presents a detailed analysis to understand how geometrical factors (e.g. periodicity, radius, width of the host transmission line, etc) affect the miniaturization performance and quality factor. As a design example, a 2GHz pin loaded hairline filter with 17% -3dB |S21| bandwidth and 1.5dB insertion loss is demonstrated. The footprint size of the filter is ~λ0/16×λ0/9 @ 2GHz and is 45% smaller than its traditional counterpart.
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Durán-Sindreu, Viader Miguel. "Miniaturization of Planar Microwave Components Based on Semi-Lumped Elements and Artificial Transmission Lines: Application to Multi-Band Devices and Filters." Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/51004.
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La miniaturización de componentes de microondas es uno de los retos de los
dispositivos de comunicación actuales y futuros. Por esta razón, esta tesis está
orientada al estudio de nuevas estrategias de miniaturización de componentes
planares de microondas no radiativos. A lo largo de este trabajo, se han aplicado
diferentes técnicas de miniaturización para el diseño de diversos componentes de
microondas como dispositivos multi-banda o filtros, incluyendo también
implementaciones eléctricamente reconfigurables.
Para obtener esta compactación de tamaño requerida y/o funcionalidad multi-banda,
se proponen nuevas líneas artificiales basadas en los resonadores semi-discretos
open split ring resonators (OSRRs) y open complementary split ring resonators
(OCSRRs). De esta forma, se presentan nuevas líneas de transmission compuestas
zurdo diestras (composite right-left handed o CRLH) aplicándose al diseño de
inversores de impedancia, divisores de potencia y filtros paso banda de banda ancha.
Adicionalmente, mediante la combinación de estos resonadores con componentes
semi-disctretos adicionales, se presentan líneas CRLH extendidas (E-CRLH) y se
aplican a la implementación de inversores de impedancia, divisores de potencia y
híbridos en cuadratura con funcionalidad en cuatro bandas (quad-band), así como
filtros paso banda de banda dual. Para demostrar y validar su funcionalidad, se
implementan y fabrican diferentes demostradores de prueba de concepto para todos
los dispositivos anteriormente mencionados, obteniendo un buen ajuste entre las
simulaciones y la medida. Además, también se presentan los modelos circuitales, así
como la metodología de diseño basada en el método de extracción de parámetros. A
través de este método, se demuestra que los modelos circuitales proporcionan una
descripción precisa de las estructuras consideradas.
También se estudia la reconfigurabilidad de las líneas CRLH presentadas
considerando sustratos ferroeléctricos, específicamente titanato de bario estroncio
(barium-strontium-titanate o BST). Mediante esta técnica, se demuestra la
reconfigurablidad de estas líneas CRLH, obteniendo un rango de sintonía simulada y
medida del 36.6%. Una vez experimentalmente validada esta técnica, se dota de
reconfigurabilidad a los componentes mono banda y de banda dual basados en líneas
CRLH previamente presentados, explorando tanto la metodología como sus
limitaciones.
Finalmente, también se presentan nuevos filtros compactos con respuestas abruptas
basados en los resonadores de salto de impedancia (stepped-impedance-resonators
o SIRs) acoplados a una línea de transmisión coplanar. Tras analizar el resonador
aislado y su modelo circuital, se diseñan filtros elípticos paso bajo y paso alto, así
como filtros paso banda con ceros de transmisión mediante la teoría de filtros
convencional, obteniendo estructuras con un alto grado de compactación y buena
funcionalidad.The miniaturization of microwave components is one of the challenges of present and future communication devices. For this reason, this thesis is focused on the study of new miniaturization strategies for planar non-radiating microwave components. Throughout this work, different miniaturization approaches have been applied to the design of several microwave components such as multi-band devices and filters, including also electronically tunable implementations. To obtain the required compact sizes and/or multi-band functionality, new artificial lines based on the semi-lumped open split ring resonators (OSRRs) and open complementary split ring resonators (OCSRRs) are proposed. Firstly, composite right-/ left-handed (CRLH) transmission lines are presented, applying such lines to the design of dual-band impedance inverters and Y-junction power dividers, as well as wideband band-pass filters. In addition, by combining these resonators with additional semilumped components, extended composite right-/left-handed (E-CRLH) transmission lines are also reported and applied to implement quad-band impedance inverters, power dividers, branch-line couplers and dual-band band-pass filters. To demonstrate and validate its functionality, different proof-of-concept demonstrators for all the aforementioned devices are implemented and fabricated, where a good agreement between simulations and measurement is obtained. Furthermore, the circuit models and the design methodology for all the presented devices are also reported, based on a parameter extraction method. Through this method it is demonstrated that the circuit models provide an accurate description of the considered structures. The tunability of such CRLH lines is also analyzed by means of barium-strontiumtitanate (BST) thick-films. With this approach, a tunable CRLH line with simulated and measured tunability range of 36.6% is demonstrated. Once this approach is experimentally validated, the previously presented mono-band and dual-band components based on the CRLH lines are provided with this tunability, exploring both its methodology and limitations. Finally, new compact filters with sharp responses are also presented based on stepped-impedance-resonators (SIRs) coupled to coplanar waveguide (CPW) host transmission lines. After analyzing the isolated resonator and its circuit model, elliptictype low-pass and high-pass filters, as well as band-pass filters with transmission zeros are designed through the conventional filter theory, where a high-degree of compactness as well as good performance is demonstrated.
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Al-Yasir, Yasir, Yuxiang X. Tu, M. S. Bakr, Parchin Naser Ojaroudi, Abdalfettah S. Asharaa, W. Mshwat, Raed A. Abd-Alhameed, and James M. Noras. "Design of multi-standard single/tri/quint-wideband asymmetric stepped-impedance resonator filters with adjustable TZs." IET Microwaves, Antennas & Propagation, 2019. http://hdl.handle.net/10454/17154.
Full textAbstract:
YesThis study presents an original asymmetric stepped-impedance resonator filter combined with meander coupled-line structures and enabling the realisation of finite transmission zeros (TZs) and the implementation of multi-band bandpass filters. The meander coupled sections (MCSs) tune the TZs and resonant frequencies: with higher-order spurious frequencies cancelled by the TZs, a single wideband with wide stopband from 1.18 to 1.84 GHz is possible. Furthermore, by positioning the finite TZs between the high-order spurious frequencies and adjusting the coupling strength between resonators, a quint-wideband filter can be realised, with centre frequencies of 1.19, 4.29, 5.43, 6.97, 9.9 GHz and fractional bandwidths of 31.9, 15.4, 15.8, 4.3, 39.2%, respectively. More importantly, two filters with single/quad-wideband performance can be realised by tuning the parameters of the MCS, and therefore they can be designed separately by using only one original structure. The triple-wideband filter is realised with the help of the asymmetric parallel uncoupled microstrip section. These filter structures enjoy the advantage of single/multi-band versatility, structure reusability and simplicity. The good in-band and out-of-band performance, low loss and simple structure of the proposed single/tri/quint-wideband filters make them very promising for applications in future multi-standard wireless communication.
European Union's Horizon 2020 research and innovation programme under Grant agreement H2020-MSCA-ITN-2016 SECRET-722424.
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Hsu, Ko-wen, and 徐克文. "Design of Multi-band Bandpass Filters for Microwave Applications." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/17121929973482871637.
Full textAbstract:
博士國立中央大學
電機工程學系
103
This dissertation employed three methods to design multi-band bandpass filter: (a) double-layered substrate; (b) asymmetrical resonator and (c) semi-lumped resonator. (a) Double-layered structure In the first section, a double-layered structure was proposed to design the multi-band bandpass filter, and explore the use of double-layered structure and stepped-impedance resonators. In the design of double-layered substrate, the useful circuit layout has twice area than the general single-layered substrate provide more design freedom; in the use of stepped-impedance resonator, the fundamental frequency and harmonics can be controlled by the design of the electrical length ratio and impedance ratio. Such design method not only can provide the multi-band bandpass filter design, but also reduce the use of circuit area. In this study, the double-layer structure was used to design the quad-band bandpass filter, quad-band bandpass filter with wide stopband response and quint-band bandpass filter. (b) Asymmetrical resonator In the second section, the asymmetrical resonator is composed of three microstrip uniform impedance resonator with different electrical length. By using theoretical analysis, projected herein, may be accurately design asymmetrical center of the resonator frequency and mode of high-frequency wave bands, and then design to achieve the desired passband response. In this study, the use of asymmetrical resonator design tri-band-pass filter, and tri-band pass filter with suppression of a wide stopper. (c) semi-lumped resonator In the third section, the semi-lumped resonator was proposed to design multi-band bandpass filter, and it is composed of two microstrip uniform impedance resonator and a lump inductor. Compared with previous general microstrip uniform impedance resonator, the proposed semi-lumped resonator has the characteristic of size reduction and harmonic control by designing the microstrip line and inductance. In this study, the use of the semi-lumped resonator was used to design the distributed sext-band bandpass filter and sharp-rejection sext-band bandpass filter.
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"Advanced microwave circuit design for multi-band applications." 2008. http://library.cuhk.edu.hk/record=b5893657.
Full textAbstract:
Law, Carlos.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references (leaves 119-122).
Abstracts in English and Chinese.
Abstract --- p.i
論文摘要 --- p.iii
Acknowledgement --- p.v
Table of Content --- p.vi
List of Figures --- p.ix
List of Tables --- p.xv
List of Abbreviations --- p.xvi
Chapter Chapter 1: --- Introduction --- p.1
Chapter 1.1 --- Emergence of Multi-band Microwave Circuits --- p.1
Chapter 1.2 --- Original Contribution --- p.2
Chapter 1.3 --- Overview of the Thesis Organization --- p.3
Chapter 1.4 --- "Research Approach, Assumptions and Limitations" --- p.5
Chapter Chapter 2： --- Fundamentals in Filter and Power Divider Design --- p.7
Chapter 2.1 --- Filter --- p.7
Chapter 2.1.1 --- Introduction to Filters --- p.7
Chapter 2.1.2 --- Transfer Function --- p.8
Chapter 2.1.3 --- Low-pass Prototype and Elements --- p.11
Chapter 2.1.4 --- Admittance Inverters --- p.13
Chapter 2.2 --- Power Divider --- p.20
Chapter 2.2.1 --- Introduction to Power Dividers --- p.20
Chapter 2.2.2 --- Wilkinson Power Divider --- p.21
Chapter 2.2.3 --- Multi-section Power Divider --- p.25
Chapter 2.2.4 --- Power Divider with Unequal Power Division --- p.27
Chapter Chapter 3： --- Conventional Multi-band Designs --- p.29
Chapter 3.1 --- Micro-strip Multi-band Filters --- p.29
Chapter 3.1.1 --- Parallel Connection of Two Single-band Filters --- p.29
Chapter 3.1.2 --- "Wide-band, Band-pass Filter and a Band-stop Filter in Cascade" --- p.32
Chapter 3.1.3 --- Parallel-coupled SIR-based Dual-band Filter --- p.33
Chapter 3.1.4 --- Vertical-stacked SIR-based Dual-band Filter --- p.34
Chapter 3.1.5 --- Cross-coupled Hairpin SIR Dual-band Filter --- p.37
Chapter 3.1.6 --- Folded Open-loop Ring Resonator-based Multi-band Filters --- p.38
Chapter 3.1.7 --- Stubbed SIR-based Single-band Filter --- p.40
Chapter 3.1.8 --- Open and Short-circuited Stub-based Dual-band Filter --- p.41
Chapter 3.1.9 --- Open Stub-based Dual-band Filter --- p.42
Chapter 3.2 --- Spurious Suppression Techniques for Filters --- p.43
Chapter 3.2.1 --- Insertion of Band-reject Filters --- p.43
Chapter 3.2.2 --- Equalization of Eigen-mode Phase Velocities --- p.43
Chapter 3.2.3 --- Insertion of Open Stubs --- p.45
Chapter 3.2.4 --- Coupled SIR-based Structures --- p.47
Chapter 3.2.5 --- Parallel Coupled Line --- p.49
Chapter 3.2.6 --- Others --- p.50
Chapter 3.3 --- Dual-band Power Dividers --- p.51
Chapter 3.3.1 --- Two-section Transmission Line Topology --- p.51
Chapter 3.3.2 --- Lumped Element-based Topology --- p.53
Chapter 3.3.3 --- Shunt Stub Topology --- p.56
Chapter Chapter 4: --- New Dual-band Filter with Wide Upper Stop-band … --- p.59
Chapter 4.1 --- Proposed Topology --- p.60
Chapter 4.2 --- Design and Analysis --- p.61
Chapter 4.3 --- Design Example --- p.73
Chapter 4.4 --- Summary --- p.79
Chapter Chapter 5: --- New Tri-band Filter Design --- p.80
Chapter 5.1 --- Proposed Topology --- p.80
Chapter 5.2 --- Design and Analysis --- p.82
Chapter 5.3 --- Design Example --- p.86
Chapter 5.4 --- Summary --- p.91
Chapter Chapter 6: --- New Dual-band Power Divider Design I --- p.92
Chapter 6.1 --- Proposed Topology --- p.92
Chapter 6.2 --- Design and Analysis --- p.94
Chapter 6.3 --- Design Example --- p.98
Chapter 6.4 --- Summary --- p.107
Chapter Chapter 7: --- New Dual-band Power Divider Design II --- p.108
Chapter 7.1 --- Proposed Topology --- p.108
Chapter 7.2 --- Design and Analysis --- p.109
Chapter 7.3 --- Design Example --- p.112
Chapter 7.4 --- Summary --- p.115
Chapter Chapter 8: --- Conclusion --- p.116
Recommendation for Future Work --- p.118
References --- p.119
Author's Publications --- p.123
Appendix 1: ABCD Parameters --- p.124
Appendix 2: Program for Tri-band Filter --- p.125
Appendix 3: Comparison of Dual-band Power Dividers --- p.129
Appendix 4: Sensitivity of Power Divider to Resistor Variation --- p.146
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Chen, Jing Peng, and 陳景鵬. "Miniaturized Microwave Multi-band Bandpass Filters Constructed With Different Circuit Structures." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/02267502403775575184.
Full textAbstract:
碩士長庚大學
電子工程學系
101
In our environment, The radio signals are transited everywhere to help people to communicate with each others . Therefore, the band-pass filter is commonly used in the wireless commutation system to reject unwanted signal and noises. Recently, the multi-band communication system are more and more popular. Thus many researches about multi-band filters have been reported. In this thesis, we present the designs of two kinds of multi-band filters, which are dual-band dual-mode ring filter and a tri-band filter consisting of different resonant structures. The ring filter are constructed by new feeding features that are different from conventional structure, so that the filter can adjust the locations of transmission zeros by using different filter structure. The size of dual-band filter is about 11×33 mm^2 and the measured insertion losses in the two passbands are less than 2.28 dB,1.95dB . The microstrip tri-band filter, which is designed by using two kinds of loop resonators and one lumped element resonator. This filter is constructed by using inductive coupled lumped resonator for the lowest passband and two folded loop resonators for the other passbands to minimize the size of the filter and minimize insertion loss of the higher passbands. The size of the filter is about 12×21 mm^2 and the measured insertion losses in the three passbands are less than 2.03 dB, 2.5 dB and 3 dB.
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Esmaeili, Mahbubeh. "Novel single-band and multi-band bandstop filters for modern wireless communication systems." Thesis, 2016. http://hdl.handle.net/1828/7236.
Full textAbstract:
The objective of this thesis is to introduce novel procedures and guidelines to design
bandstop microwave filters for modern terrestrial and satellite wireless communication
systems. Among all available microwave filter technologies, planar structures
of microstrip and substrate integrated waveguide (SIW) are chosen, due to ease of
fabrication, low profile, weight and manufacturing cost. Particularly, SIW structures
are more attractive because they have a better insertion loss, quality factor, and
power handling capability in comparison to their microstrip counterparts, and can
also be easily integrated into other planar circuitries.
A comprehensive hybrid analytic-optimization method is developed to synthesize
any single-band as well as multi-band bandstop coupling matrix. In this method, the
location of reflection zeros (RZs) and the attenuations in stopbands can be determined
in advance.
Several novel single-band, dual-band, and triple-band bandstop filters are designed
using regular and ridged SIW resonators, in-line coupled singlet resonators,
cross-coupled resonators, and bandstop stubs. The designed filters have fractional
bandwidths up to 23% . Moreover, a tunable ridged SIW bandstop resonator and a
tunable CPW resonator, etched into the top plate of the SIW transmission line, are introduced. Combining these two resonators, a dual-band SIW filter is designed that
permits one of its stopband to be tuned while another stopband is fixed.
All introduced filters in this thesis are verified by commercial electromagnetic
software, analytic investigations using Matlab codes, and measurements.Graduate
Books on the topic "Multi-band microwave filters"
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Crnojević-Bengin, Vesna. Advances in Multi-Band Microstrip Filters. Cambridge University Press, 2015.
Find full textBook chapters on the topic "Multi-band microwave filters"
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Liu, Haiwen, Baoping Ren, Xuehui Guan, Pin Wen, and Tao Zuo. "Multi-band HTS Filters Based on Hybrid-Mode Square Ring Loaded Resonator (SRLR)." In High-Temperature Superconducting Microwave Circuits and Applications, 117–51. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6868-4_5.
Full text
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Liu, Haiwen, Baoping Ren, Xuehui Guan, Pin Wen, and Tao Zuo. "Multi-band HTS Filter Based on Degenerate Mode Resonator." In High-Temperature Superconducting Microwave Circuits and Applications, 39–46. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6868-4_3.
Full textConference papers on the topic "Multi-band microwave filters"
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Bila, S., R. Cameron, P. Lenoir, V. Lunot, and F. Seyfert. "Chebyshev Synthesis for Multi-Band Microwave Filters." In 2006 IEEE MTT-S International Microwave Symposium Digest. IEEE, 2006. http://dx.doi.org/10.1109/mwsym.2006.249430.
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Lunot, V., S. Bila, and F. Seyfert. "Optimal Synthesis for Multi-Band Microwave Filters." In 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380268.
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Macchiarella, Giuseppe, and Stefano Tamiazzo. "Dual-Band Filters for Base Station Multi-Band Combiners." In 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380429.
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"TH3A: Multi-band and multi-mode planar filters." In 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. IEEE, 2011. http://dx.doi.org/10.1109/mwsym.2011.5973188.
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Zhang, Yunchi, Kawthar A. Zaki, Jorge A. Ruiz-Cruz, and Ali E. Atia. "Analytical Synthesis of Generalized Multi-band Microwave Filters." In 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380425.
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Yu, Xumin, Xiaohong Tang, Fei Xiao, and Fei Xu. "A new class of multi-band waveguide filters." In 2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT). IEEE, 2012. http://dx.doi.org/10.1109/icmmt.2012.6230337.
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Gomez-Garcia, Roberto, Manuel Sanchez-Renedo, Bernard Jarry, Julien Lintignat, and Bruno Barelaud. "Microwave multi-path dual-passband filters for wide-band applications." In 2009 39th European Microwave Conference (EuMC). IEEE, 2009. http://dx.doi.org/10.23919/eumc.2009.5296152.
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Lee, Jahyeon, and Yeongseog Lim. "Design of a microstrip multi-band bandpass filters using the filter synthesis method." In 2012 42nd European Microwave Conference (EuMC 2012). IEEE, 2012. http://dx.doi.org/10.23919/eumc.2012.6459250.
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Psychogiou, Dimitra, Roberto Gomez-Garcia, and Dimitrios Peroulis. "A class of fully-reconfigurable planar multi-band bandstop filters." In 2016 IEEE/MTT-S International Microwave Symposium (IMS). IEEE, 2016. http://dx.doi.org/10.1109/mwsym.2016.7540362.
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Meyer, P., and T. G. Brand. "Design equations for multi-band coupled-resonator filters using reactance mapping." In 2015 Asia-Pacific Microwave Conference (APMC). IEEE, 2015. http://dx.doi.org/10.1109/apmc.2015.7411630.
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