Relevant bibliographies by topics / Planar filters

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Planar filters'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 June 2025

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Journal articles on the topic "Planar filters"

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Hong, Jia-sheng. "Reconfigurable planar filters." IEEE Microwave Magazine 10, no. 6 (2009): 73–83. http://dx.doi.org/10.1109/mmm.2009.933590.

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CASSINESE, A., A. ANDREONE, P. ORGIANI, et al. "HIGH POWER HANDLING SUPERCONDUCTING PLANAR FILTERS FOR TELECOMMUNICATION APPLICATIONS." International Journal of Modern Physics B 14, no. 25n27 (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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Dean, Robert, and Jonathan Richard. "Testing of Flexible Metamaterial RF Filters Implemented through Micromachining LCP Substrates." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, DPC (2012): 001115–38. http://dx.doi.org/10.4071/2012dpc-tp35.

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Metamaterials have a wide range of potential uses in areas such as optics, transmission lines, and RF design. The simplest metamaterial structures are Split-Ring Resonators (SRR) and Complementary Split-Ring Resonators (CSSR). Through the combination of various forms of these structures, different applications in the areas previously stated can be achieved. Under this investigation, a metamaterials transmission line was realized through micromachining a Liquid Crystal Polymer (LCP) substrate. Not only does LCP possess useful RF properties, it is flexible and micromachinable. This transmission line consisted of several CSSRs in series, which performed as a high-order, high-frequency filter. This structure was unique to most metamaterial structures because LCP is a flexible substrate. Prototype filters were fabricated and evaluated. One test involved flexing the devices over various radii of PVC pipe sections to evaluate the effects of flexing the substrate on the filter's performance. The filter properties were shown to maintain approximately the same frequency and roll-off while being bent over the various radii of curvature. Therefore, arrays of these filters could be fabricated with planar processes and attached to non-planar surfaces, such as airfoils, for uses such as radar cloaking.
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Su, Te-Jen, Tsang-Chi Yang, Wen-Pin Tsai, and Jia-Wei Liu. "Design Two-Dimensional IIR Filters Based on Clonal Selection Algorithm with Singular Value Decomposition." Research Letters in Signal Processing 2007 (2007): 1–5. http://dx.doi.org/10.1155/2007/32081.

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In this letter, clonal selection algorithm (CSA) with singular value decomposition (SVD) method is investigated for the realization of two-dimentional (2D) infinite-impulse response (IIR) filters with arbitrary magnitude responses. The CSA is applied to optimize the sampled frequencies of transition band of digital filters, then producing a planar response matrix of a 2D IIR digital filter. By using the SVD, 2D magnitude specifications can be decomposed into a pair of 1D filters, and thus the problem of designing a 2D digital filter can be reduced to the one of designing a pair of 1D digital filters or even only one 1D digital filter. The stimulation results show the proposed method has the better performance of the minimum attenuation between the passband and stopband.
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Al-Yasir, Yasir, Naser Ojaroudi Parchin, Raed Abd-Alhameed, Ahmed Abdulkhaleq, and James Noras. "Recent Progress in the Design of 4G/5G Reconfigurable Filters." Electronics 8, no. 1 (2019): 114. http://dx.doi.org/10.3390/electronics8010114.

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Currently, several microwave filter designs contend for use in wireless communications. Among various microstrip filter designs, the reconfigurable planar filter presents more advantages and better prospects for communication applications, being compact in size, light-weight and cost-effective. Tuneable microwave filters can reduce the number of switches between electronic components. This paper presents a review of recent reconfigurable microwave filter designs, specifically on current advances in tuneable filters that involve high-quality factor resonator filters to control frequency, bandwidth and selectivity. The most important materials required for this field are also highlighted and surveyed. In addition, the main references for several types of tuneable microstrip filters are reported, especially related to new design technologies. Topics surveyed include microwave and millimetre wave designs for 4G and 5G applications, which use varactors and MEMSs technologies.
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Simpson, Dakotah J., Roberto Gómez-García, and Dimitra Psychogiou. "Mixed-technology quasi-reflectionless planar filters: bandpass, bandstop, and multi-band designs." International Journal of Microwave and Wireless Technologies 11, no. 5-6 (2019): 466–74. http://dx.doi.org/10.1017/s1759078719000230.

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AbstractThe design of mixed-technology quasi-reflectionless planar bandpass filters (BPFs), bandstop filters (BSFs), and multi-band filters is reported. The proposed quasi-reflectionless filter architectures comprise a main filtering section that determines the power transmission response (bandpass, bandstop, or multi-band type) of the overall circuit network and auxiliary sections that absorb the reflected radio-frequency (RF) signal energy. By loading the input and output ports of the main filtering section with auxiliary filtering sections that exhibit a complementary transfer function with regard to the main one, a symmetric quasi-reflectionless behavior can be obtained at both accesses of the overall filter. The operating principles of the proposed filter concept are shown through synthesized first-order BPF and BSF designs. Selectivity-increase techniques are also described. They are based on: (i) cascading in-series multiple first-order stages and (ii) increasing the order of the filtering sections. Moreover, the RF design of quasi-reflectionless multi-band BPFs and BSFs is discussed. A hybrid integration scheme in which microstrip-type and lumped-elements are effectively combined within the filter volume is investigated for size miniaturization purposes. For experimental validation purposes, two quasi-reflectionless BPF prototypes (one- and two-stage architectures) centered at 2 GHz and a second-order BSF prototype centered at 1 GHz were designed, manufactured, and measured.
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Nedelchev, M., and A. Kolev. "Synthesis of Planar Filters Using Defected Ground Structure Miniaturized Hairpin Resonators." Engineering, Technology & Applied Science Research 9, no. 1 (2019): 3734–38. http://dx.doi.org/10.48084/etasr.2424.

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This paper presents an effective technique to suppress the spurious passbands in planar filters by using defected ground structure (DGS) resonators etched in the ground plane. The proposed miniaturized hairpin DGS slot resonator is researched in terms of its resonance frequency, corresponding coupling topologies, and filter design. The resonator and the topologies of coupled DGS resonators are simulated in a fullwave electromagnetic (EM) simulator. Using a curve-fitting technique, useful design formulas are proposed for filter synthesis. Using the synthesis procedure, a 3rd order filter design is simulated, manufactured and measured. The insertion loss of -3dB in the passband of 280MHz is observed, while the suppression of the spurious passbands up to 12GHz is more than 24dB.
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Gomez-Garcia, Roberto, Miguel-Angel Sanchez-Soriano, Kam-Weng Tam, and Quan Xue. "Flexible Filters: Reconfigurable-Bandwidth Bandpass Planar Filters with Ultralarge Tuning Ratio." IEEE Microwave Magazine 15, no. 5 (2014): 43–54. http://dx.doi.org/10.1109/mmm.2014.2321094.

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Kondapalli, Soumya, Arjuna Madanayake, and Len Bruton. "Digital Architectures for UWB Beamforming Using 2D IIR Spatio-Temporal Frequency-Planar Filters." International Journal of Antennas and Propagation 2012 (2012): 1–19. http://dx.doi.org/10.1155/2012/234263.

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A design method and an FPGA-based prototype implementation of massively parallel systolic-array VLSI architectures for 2nd-order and 3rd-order frequency-planar beam plane-wave filters are proposed. Frequency-planar beamforming enables highly-directional UWB RF beams at low computational complexity compared to digital phased-array feed techniques. The array factors of the proposed realizations are simulated and both high-directional selectivity and UWB performance are demonstrated. The proposed architectures operate using 2's complement finite precision digital arithmetic. The real-time throughput is maximized using look-ahead optimization applied locally to each processor in the proposed massively-parallel realization of the filter. From sensitivity theory, it is shown that 15 and 19-bit precision for filter coefficients results in better than 3% error for 2nd- and 3rd-order beam filters. Folding together with Ktimes multiplexing is applied to the proposed beam architectures such that throughput can be traded forK-fold lower complexity for realizing the 2-D fan filter banks. Prototype FPGA circuit implementations of these filters are proposed using a Virtex 6 xc6vsx475t-2ff1759 device. The FPGA-prototyped architectures are evaluated using area (A), critical path delay (T), and metricsATandAT2. TheL2error energy is used as a metric for evaluating fixed-point noise levels and the accuracy of the finite precision digital arithmetic circuits.
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Danilov, V. V., S. L. Skripka, and A. Yu Nechiporuk. "Rejector and coupling filters in planar realization." Radioelectronics and Communications Systems 52, no. 2 (2009): 106–8. http://dx.doi.org/10.3103/s0735272709020101.

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Dissertations / Theses on the topic "Planar filters"

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Basti, Ahmed. "Développement de méthodes de synthèse pour la conception de filtres hyperfréquences compacts et optimisés en pertes." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0023/document.

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Pour les systèmes de communication par satellite, des filtres avec de très bonnes performances électriques sont indispensables afin de rejeter les signaux indésirables dans de nombreuses parties de la chaîne de communication. Les technologies fort-Q peuvent répondre à cette exigence mais elles conduisent souvent à des dispositifs encombrants. D'autre part, les technologies compactes faible-Q souffrent généralement d'une dégradation des performances électriques en termes de pertes d'insertion, de sélectivité et de platitude. Pour répondre à une demande croissante concernant la réduction de la taille, il est essentiel de développer des filtres hyperfréquences compacts avec des performances électriques améliorées.Pour le filtre de réception, le défi est de concevoir un filtre passe-bande compact avec une réponse plate dans la bande passante et une forte réjection hors bande. Les pertes d'insertion ne sont pas cruciales et peuvent être compensées par un amplificateur en laissant ainsi un espace pour la conception de filtre à pertes. Un tel filtre accepte des pertes supplémentaires, qui peuvent être distribués dans le réseau afin de fournir une transmission plate dans la bande passante et une forte sélectivité hors bande.Dans le cadre de cette thèse, des nouvelles méthodes de synthèse de dispositifs de filtrage ont été étudiées et développées dans le but d’améliorer les performances tout en conservant un encombrement réduit. Ces méthodes ont été validées pour la conception de filtres de récepteur dans la charge utile de satellites de télécommunication dans le cadre d’une collaboration entre le laboratoire Xlim, le Centre National d’Etudes Spatiales et Thales Alenia Space<br>For satellite communication systems, high performance filters are needed in order to reject unwanted signals in many parts of the communication chain. High quality factor (Q) technologies can meet this requirement, but they often lead to bulky devices. On the other hand, compact technologies are generally low Q and suffer from a degradation of electrical performances in terms of insertion loss, selectivity and flatness. To meet a growing demand concerning size reduction, it is essential to develop compact microwave filters with improved electrical performances.For a receive filter, the challenge is to design a compact bandpass filter with a flat response in the passband and a sharp transition in the passband edges. The insertion loss is not crucial and it can be compensated by the amplifier, leaving a room to the design of a lossy filter. Such a filter accepts additional losses, which can be distributed in the network in order to provide a flat transmission in the passband and a sharp selectivity.In this thesis, new synthesis methods for filtering devices have been studied and developed to improve performances while maintaining a small footprint. These methods have been validated for the design of filters for a receiver in payload satellites as part of collaboration between the Xlim laboratory, the France National Space Centre and Thales Alenia Space
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Kelly, James. "Planar microwave filters with reconfigurable or enhanced characteristics." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/12081.

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This thesis presents two frequency switchable micro strip line filters. It also presents a third filter that has the potential for frequency and bandwidth reconfiguration. All of these filters are reconfigured using an optically activated silicon switch. This method of tuning is very simple, cheap, and effective. Three new, fixed frequency, filters were also developed as a bi-product of the research presented in this thesis. These filters are smaller than their predecessors, or conventional counterparts. Two Metallodielectric Electromagnetic BandGap (MEBG) low-pass filters, number amongst the new filter designs. These low-pass filters offer a sharper rate of cut-off than is associated with the conventional stepped-impedance filter. They also provide a deep, broad, and well defined stop-band. A miniatursed triangular patch band-pass filter is also presented. This work develops on research by Hong, Lancaster, et al. Design equations and/or modelling aids are presented for each of the new filter structures. On occasions these modelling aids take the form of a lumped-element equivalent circuit together with a series of polynomial equations for determining the element values. Modelling aids, of this nature, are presented for the cymbal resonator band-pass filter. The study into frequency tuneable filters led to an investigation of a particular conduct polymer and the production of a tutorial on dielectric measurement.
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Beukman, Theunis Steyn. "Tune-all wideband planar filters for KAT-7." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17791.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: A new type of wideband lters, with tunability in both the centre frequency and bandwidth, is presented in this thesis. These lters are based on perturbed ring-resonators in cascade, while varactor diodes are used for electronic tuning. The Karoo Array Telescope (KAT-7) requires a front-end lter that has the ability for ne-tuning the response after fabrication, in order to obtain the designed ltering response. Not only are tune-all characteristics required, but also wide bandwidth, at passband, high selectivity and implementation in microstrip technology. In this thesis an extensive investigation of both tunable and wideband lters is done, in order to nd a possible solution for the KAT-7 speci cations. Following this investigation, it is concluded that no suitable design approach for tune-all wideband lters, implemented in microstrip, exists in current literature. Therefore, this thesis proposes a new type of lter along with the development of a complete design procedure. Two lters are designed with this procedure to achieve the required passband from 1.2 to 1.95 GHz (i.e. a fractional bandwidth of 49%). In the rst lter design, with a network consisting of 4 cascaded ltering-sections, the centre frequency is 5% tunable and the bandwidth 17.5%. With the second lter consisting of 6 cascaded ltering-sections, higher selectivity is achieved but with lower return loss. Here the centre frequency is 8.5% tunable and the bandwidth 18.8%. The theoretical results are validated with the fabrication of both lters. This design is very unique in that it achieves wide bandwidth, is realisable in microstrip and most importantly is tunable in both the centre frequency and bandwidth. An advantage of this design procedure is that full wave simulations are minimal, due to the complete circuit models used for optimisation.<br>AFRIKAANSE OPSOMMING: 'n Nuwe soort van wye-band lters, met verstelbaarheid in beide senter frekwensie en bandwydte, word voorgelê in hierdie tesis. Hierdie lters is gebaseer op versteurde ringresoneerders in kaskade, terwyl varaktordiodes gebruik word vir elektroniese verstelling. Die Karoo Array Telescope (KAT-7) vereis 'n voorkant lter wat die vermoë het vir die instemming van die respons na fabrikasie, sodat die geontwerpde lter respons behaal kan word. Nie net word verstel-als eienskappe vereis nie, maar ook wye bandwydte, plat deurlaatband, hoë selektiwiteit en implimentering in mikrostrook tegnologie. In hierdie tesis is 'n veelomvattende ondersoek gedoen van beide verstelbare en wyeband lters, sodat 'n moontlike oplossing vir die KAT-7 spesi kasies gevind kan word. Na aanleiding van hierdie ondersoek, is die gevolgtrekking dat daar geen gepaste ontwerp benadering vir verstel-als wye-band lters, wat geïmplimenteer is in mikrostrook, in huidige literatuur bestaan nie. Daarom stel hierdie tesis, saam met die ontwikkeling van 'n volledige ontwerp prosedure, 'n nuwe tipe lter voor. Twee lters is ontwerp met hierdie prosedure om die vereiste deurlaatband vanaf 1.2 tot 1.95 GHz (dit is 'n fraksionele bandwydte van 49%) te behaal. In die eerste lter ontwerp, met 'n netwerk wat uit 4 kaskade lter-seksies bestaan, is die senter frekwensie 5% verstelbaar en die bandwydte 17.5%. Met die tweede lter bestaande uit 6 kaskade lter-seksies, word hoër selektiwiteit behaal maar met laer eggoverswakking. Hier is die senter frekwensie 8.5% verstelbaar en die bandwydte 18.8%. Die teoretiese resultate is geldig bewys deur die fabrikasie van albei lters. Hierdie ontwerp is baie uniek in dat dit wye bandwydte behaal, is realiseerbaar in mikrostrook en mees belangrikste dat dit verstelbaar is in beide senter frekwensie en bandwydte. 'n Voordeel van hierdie prosedure is dat heelgolf simulasies minimaal is, a.g.v. die volledige stroombaan modelle wat gebruik word vir optimering.
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Rabbi, Khondker M. F. "Miniaturised and reconfigurable planar filters for ultra-wideband applications." Thesis, University of Westminster, 2014. https://westminsterresearch.westminster.ac.uk/item/8yv57/miniaturised-and-reconfigurable-planar-filters-for-ultra-wideband-applications.

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An increasing demand for electromagnetic spectrum has resulted from the emergence of feature-rich and faster throughputs wireless applications. This necessitates the developments of dynamic reconfigurable or multifunctional systems to better exploit the existing spectrum. Future wireless devices will be expected to communicate over several bands with various other devices in order to fine tune the services they provide to the user. Each band may require a separate RF transceiver and such modern wireless multi-band multi-mode communication systems call for high performance, highly integrated compact modules. Since the Federal Communications Commission (FCC) released the unlicensed frequency band 3.1-10.6 GHz for ultra-wideband (UWB) commercial communications, the development race for commercialising UWB technology has seen a dramatic increase around the world. The aim of this research is to develop reconfigurable planar microwave filters for ultrawideband applications. The project investigates some key design issues of reconfigurable filters, which are being observed constantly in the latest development and realisation of microwave filters. Both analytical and numerical methods are performed to construct a realistic and functional design. Two different types of frequency reconfigurability are investigated in this thesis: discrete (e.g. PIN diode, Optical switch) and continuous (e.g. varactor diode). Using the equivalent circuits and considering the direct coupled filter structure in most cases, several topologies with attractive features are developed for future communication systems. The proposed works may be broadly categorised into three sections as follows. The first section explores a square ring shape close loop resonator along with an opencircuited stub in the symmetry plane. To realise a reconfigurable frequency states within the same spectrum, an innovative approach is developed for this case. An optical or photoconductive switch, comprised of a silicon die activated using near infrared light is investigated as a substitute of PIN diode and performances are evaluated to compare the feasibilities. In addition, a in-band interference rejection technique via externally coupled Tshape resonator is shown. However, it is observed that both structures achieve significant size reductions by utilising the inner part of the resonators. To improve the filter selectivity, a convenient design approach generating a pair of transmission zeros between both passband edges and a single zero in the stop band for harmonic suppression is discussed in the second section. Moreover, the development of notched rejection bands are studied and several novel methods to create a single and multiple notched bands employing the square ring shape structure are proposed. On inspection, it is found that the notch structure can be implemented without deteriorating the filter performances. The discussions are supplemented with detailed design examples which are accompanied by theoretical, simulated and experimental results in order to illustrate the filter development process and showcase practical filter performance. The third section reveals a novel highly compact planar dual-mode resonator with sharp rejections characteristics for UWB applications. A bandwidth reconfiguring technique is demonstrated by splitting its even-mode resonance. Filter structure with the dual-mode resonator is shown to have a relatively wide tuning range, significantly low insertion loss and a constant selectivity along with frequency variations in comparison to similar published works. Finally, the earlier dual-mode structure are modified to realise a dual wideband behaviour. A detail analysis with comprehensive design procedures is outlined and a solution for controlling the frequency bandwidths independently according to the application interest is provided. In line with the previous section, experimental verification is presented to support and supplement the discussions.
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Nepaya, Leokadia Ndeapo Popyeni. "Practical realisation of multiband planar filters on multilayer substrates." Doctoral thesis, Faculty of Engineering and the Built Environment, 2019. http://hdl.handle.net/11427/30347.

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This research presents the design of planar microwave filters implemented on microstrip multi-layer technology. These should be able to attain and realize specified essential requirements such as multi-band operation, compact size, and without significant deteriorated filter performance in comparison with single-band filters. The focus is placed on new synthesis and design procedures for multiband responses. In some cases, the possibility to include re-configurable characteristics of these filters is required. The focus of the research is entirely on examining the properties and implications of a previously proposed reactance transform method for multiband filter synthesis. The research commences with reviews of multi-band filter synthesis methods. The research specifically examines a full analytical synthesis approach based on reactance transforms method and the implications for practical design approaches Investigations on narrowband with coupled resonator filters representation and wide-band with quasi-lumped element filters representation of up to quad-bands based on reactance transform method are undertaken. With the emphasis on practical aspects such as losses and selectivity, which are related to the physical implementation on multi-layer substrate, the key differences between multiband and single-band filters based on a reactance transform are highlighted. It is illustrated that, in addition to the order of the basis filter, selectivity is influenced by the number of bands, the spacing of the bands and the relative bandwidths. It is also shown that loss has a significant effect on multiband filter responses, in a somewhat different way from that for single-band filters. Physical designs of narrow- band coupled resonators filters are implemented with the aim of examining the degrees of design freedom for multi-layer substrate design, considering the resonance properties and couplings between resonators and considering loss for resonators on different layers. Mercurywave 9350, a low-cost multi-layer substrate is chosen and deemed suitable for a number of reasons, including relatively constant permittivity over frequency. The designs consist of novel topologies: parallel connected multi-path referred to as transversal and also all-pole topologies. A transversal topology includes a dual-band dual-path design as well as a dual-band triple-path design while the all-pole topology is a quad-band design. The research explores re-configurable characteristics of narrow-band coupled resonators of a dual-band dual-path design. A process to obtain a re-configurable multi-band filter with electronically selected pass-bands, based on a reactance transform method for coupled resonator filters, is described. A dual-band multi-band filter realized on multi-layer substrate is designed for passive space applications and reconfigurability is demonstrated using a pre-selection method. For wide-band, quasi-lumped element filters are realized on multi-layer substrate, the inductors are implemented as rectangular spiral inductors and Capacitors as broadside coupling plates connected from two different layers through metallic vias. Parasitic that may influence the relative bandwidths.
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Tang, Wenxing. "Planar microwave filters with electronically tunability and other novel configurations." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2445.

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In order to meet the increasing demands of advance wireless communications and radar systems, several novel types of bandpass filters and bandstop filters have been developed in this thesis. A new type of varactor-tuned dual-mode bandpass filters have been presented to achieve a nearly constant absolute bandwidth over a wide tuning range by using a single DC bias circuit. Since the two operating modes (i.e., the odd and even modes) in a dualmode microstrip open-loop resonator do not couple to each other, tuning the passband frequency is accomplished by merely changing the two modal frequencies proportionally. Design equations and procedures are derived, and two two-pole tunable bandpass filters and a four-pole tunable bandpass filter of this type are demonstrated experimentally. Miniature microstrip doublet dual-mode filters that exhibit quasi-elliptic function response without using any cross coupling have been developed. It shows that a single two-pole filter or the doublet can produce two transmission zeros resulting from a double behaviour of the dual-mode resonator of this type. Electromagnetic (EM) simulation and experiment results of the proposed filters are described. Parallel feed configuration of a microstrip quasi-elliptic function bandpass filter has been built with a pair of open-loop dual-mode resonators. By employing this new coupling scheme, a novel filter topology with three-pole quasi-elliptic function frequency response can be obtained, leading to good passband performance, such as low insertion loss and good matching at the mid-band of passband. A designed three-pole bandpass filter of this type is demonstrated experimentally. A new class of dual-band filters based on non-degenerate dual-mode microstrip slow-wave open-loop resonators, which support two non-degenerate modes that do not couple, have been introduced. Different feed schemes that affect the filtering characteristics are investigated. Examples of dual-band filters of this type are described with simulation and experiment results. iii In order to achieve a wide spurious-free upper passband, a novel design of bandstop filter with cancellation of first spurious mode by using coupled three-section step impedance resonators (SIRs) has been developed. This cancellation occurs when two transmission poles coincide with the first spurious mode (transmission zero) by properly choosing the step impedance ratio and the gap between the SIR and the main transmission line. A stripline bandstop filter and a microstrip bandstop filter of this type are designed, fabricated and tested. As a preliminary investigation, the microstrip filter is tuned electronically using ferroelectric thin film varactors.
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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 incluant le modèle électrique des composants localisés utilisés, diodes varactors et capacités fixes. Les deux filtres reconfigurables ont été réalisés en technologie circuit imprimé. Les dimensions minimum du « layout » ont été choisies afin d'être compatibles avec une technologie bas coût, la dimension la plus faible n'étant pas inférieure à 0,5 mm<br>The objective of this thesis is the design and synthesis of tunable bandpass filters at microwave frequencies using planar patch resonators. A methodology for the design and synthesis of tunable patch filters is developed and applied to two filters with triangular and circular topologies. The methodology provides techniques to extract the coupling scheme that models the filter behavior and the necessary equations for calculating the corresponding coupling matrix. Then, the theoretical filter response resulting from the analysis of the coupling matrix coefficients is compared to the results of complete simulations. The complete simulations combine the results of the 3D electromagnetic (EM) simulation of the filter layout with the results of the electrical simulation of the tuning devices, represented by their lumped elements equivalent model. This allows the correct model of the tuning effect and the definition of the tuning possibilities and limits. In order to validate the methodology, the tunable patch filters are fabricated using Microwave Integrated Circuit (MIC) technology on flexible substrates. The minimum dimensions are greater than 0.5 mm, ensuring a low cost fabrication process
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Zayniyev, Damir. "Development of planar filters and diplexers for wireless transceiver front ends." Thesis, University of Westminster, 2010. https://westminsterresearch.westminster.ac.uk/item/908q7/development-of-planar-filters-and-diplexers-for-wireless-transceiver-front-ends.

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The central theme of this work is the design of compact microstrip bandpass filters and diplexers and the investigation of applications of these circuits in integrated transceiver RF front-end. The core of this thesis therefore presents the following stages of the work: - Analysis of coupled pseudo-interdigital resonators and lines; formulation of approximate transmission zero conditions and the investigation of coupling between these two resonators and related structures. - Development of compact, low loss and high selectivity microstrip pseudointerdigital bandpass filters. The design procedure of the filter consists of three simple steps, starting from the design of a parallel-coupled bandpass filter using the image parameter method applied to coupled microstrip lines. The development of compact microstrip diplexers composed of these filters uses the optimized common-transformer diplexing technique. An experimental verification of the developed filters and diplexers is made. - Investigation of the use of stepped impedance resonators (SIR) for the design of pseudo-interdigital bandpass filters with advanced characteristics. The design of compact dual-band filter using SIR. The investigation of possible improvement of the stopband of bandpass filters using bandstop generating structures. The application of SIR, defected ground structures (DGS), spur-lines, and opencircuited stubs in the design of compact bandpass filters with improved stopband. - The application of the proposed filters and diplexers in the design of integrated antenna filters and antenna diplexers. Improvement of performance of patch antennas, such as suppression of spurious harmonics of single-band antenna and improvement of bandwidth and selectivity of dual-band antenna, as a result of integration with filters. Separation of antennas’ bands and reduction of component count in integrated antenna diplexers
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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 incluant le modèle électrique des composants localisés utilisés, diodes varactors et capacités fixes. Les deux filtres reconfigurables ont été réalisés en technologie circuit imprimé. Les dimensions minimum du " layout " ont été choisies afin d'être compatibles avec une technologie bas coût, la dimension la plus faible n'étant pas inférieure à 0,5 mm.
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Sans, Soler Marc. "Unattended design of wideband planar filters based on stepped impedance resonators (SIRs) through aggressive space mapping (ASM)." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/664688.

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La síntesis de circuitos planares de microondas capaces de satisfacer un conjunto de especificaciones es un tema de interés en la actualidad dentro del campo de la ingeniería de microondas. A pesar de que la mayoría de las herramientas software de diseño asistido y los simuladores electromagnéticos disponibles en el mercado incluyen optimizadores, obtener la topología del circuito que cumple con las especificaciones es generalmente complicado. La convergencia a la solución óptima no está siempre garantizada a no ser que el layout inicial sea muy próximo al que ya proporciona la respuesta objetivo y la experiencia del diseñador juega un papel clave en este proceso de optimización a medida que la complejidad del circuito aumenta. Por otro lado, los filtros de microondas single-ended y, más concretamente, los filtros de microondas balanceados, se han convertido en dispositivos esenciales debido a los recientes avances en el desarrollo de las tecnologías de comunicación modernas, dónde elevados niveles de integración y sistemas más complejos son requerimientos fundamentales. Por lo tanto, un proceso sistemático capaz de proporcionar el layout del filtro que cumple con las especificaciones requeridas sería muy bien recibido para la comunidad de los ingenieros de microondas. Esta tesis está orientada a la síntesis automática de filtros de microondas planares single-ended y balanceados que proporcionan respuestas pasa banda y de banda ancha. Estas estructuras se basan en elementos resonantes semi-concentrados, implementados mediante una combinación de secciones de líneas de transmisión de alta y baja impedancia, más conocidos como Resonadores de Salto de Impedancia (SIRs). La estrategia de optimización, basada en la técnica de Aggressive Space Mapping (ASM), tiene el objetivo de generar el layout del filtro que satisface las especificaciones siguiendo un proceso totalmente desasistido. De este modo, este método de síntesis automática puede dar lugar a la implementación de una herramienta de optimización asociada a este tipo de filtros basados en SIRs, adecuada para ser incorporada en cualquier software existente en el mercado dedicado al diseño de dispositivos de microondas Con este propósito, algoritmos basados en ASM son desarrollados en esta tesis para la síntesis automática de distintas topologías de filtros de microondas single-ended y balanceados basados en SIRs. Los procedimientos para el diseño automático de éstos dispositivos son descritos en detalle y su funcionalidad es validada mediante su aplicación a la generación de distintos layouts destinados a satisfacer un conjunto particular de especificaciones en cada caso. Los procesos de síntesis automática desarrollados y los resultados obtenidos revelan que esta metodología de optimización puede ser aplicada a muchos otros tipos de filtros, y han conducido a este trabajo de investigación a contribuir en el estado del arte con nuevas estrategias en la formulación del ASM y con innovadoras topologías de filtros pasa banda de banda ancha.<br>The synthesis of planar microwave circuits able to satisfy a set of given specifications has been a subject of interest in the microwave community for years. Despite the fact that most commercially available computer aided design tools and electromagnetic solvers include optimizers, obtaining the circuit topologies that satisfy the design requirements is generally cumbersome. Convergence to the optimum solution is not always guaranteed unless the seeding layout is already very close to the one providing the target response, and designer experience plays a key role in such optimization process as long as the circuit complexity increases. On the other hand, single-ended and, more specially, balanced microwave filters have become essential devices with the recent advances in the development of wireless communication technologies, where higher levels of integration and more complex microwave systems are key requirements. Therefore, a systematic procedure able to provide the filter layout satisfying the required specifications would be very welcomed by microwave engineers. This thesis is focused on the automatic synthesis of single-ended and balanced planar microwave filters providing wideband bandpass responses. Such filter structures are based on semi-lumped resonant elements, implemented by a combination of high and low impedance transmission line sections, also known as Stepped Impedance Resonators (SIRs). The optimization approach, based on the Aggressive Space Mapping (ASM) technique, is aimed to generate the filter layout from design specifications following a completely unattended scheme. Therefore, such filter optimization scheme can represent the first step towards an optimization tool for this type of SIR-based filters suitable to be part of any commercially available engineering software focused on microwave design. To this end, specific ASM-based algorithms are developed in order to automatically synthesize multiple single-ended and balanced filter topologies based on SIRs. The proposed automatic design procedures are thoroughly detailed and validated through its application to generate several filter layouts starting from different sets of practical specifications. The reported procedures and the results obtained reveal that this optimization methodology can be extended to many other filter structures, and have lead this research work to contribute to the state of the art with innovative strategies in the ASM formulation as well as with novel synthesized passband filter topologies.
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Books on the topic "Planar filters"

1

Helszajn, J. Microwave planar passive circuits and filters. J. Wiley, 1994.

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Helszajn, J. Synthesis of lumped element, distributed and planar filters. McGraw-Hill, 1990.

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Helszajn, J. Synthesis of lumped element, distributed and planar filters. McGraw-Hill, 1989.

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Rozzi, T. Advanced electromagnetic analysis of passive and active planar structures. Institution of Electrical Engineers, 1999.

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Sherstnev, Nikolay. Maintenance and repair of ship pipelines, valves and filters. INFRA-M Academic Publishing LLC., 2019. http://dx.doi.org/10.12737/1048799.

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The tutorial shows the design features of ship pipelines, valves and filters that affect the conditions of their operation and methods of maintenance and repair. Recommendations for external inspection and control of their elements are given. The features of disassembly and Assembly of various types of valves and filters are shown. With examples from ship practice typical defects of the specified elements, ways of their definition and elimination are considered.&#x0D; It is intended for students of higher educational institutions (specialization in the specialty "Operation of ship power plants") and University teachers. It can also be used in the system of secondary vocational education in the specialty "Operation of ship power plants".
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Booth, Stephen. Minimizing operational interruption during filter bed surveillance. Awwa Research Foundation, 2006.

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Booth, Stephen. Minimizing operational interruption during filter bed surveillance. Awwa Research Foundation, 2006.

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Booth, Stephen. Minimizing operational interruption during filter bed surveillance. Awwa Research Foundation, 2006.

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Booth, Stephen. Minimizing operational interruption during filter bed surveillance. Awwa Research Foundation, 2006.

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Cornwell, David A. Innovative applications of treatment processes for spent filter backwash. Water Research Foundation, 2010.

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Book chapters on the topic "Planar filters"

1

Hrobak, Michael. "Planar Directional Couplers and Filters." In Critical mm-Wave Components for Synthetic Automatic Test Systems. Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-09763-9_3.

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Zakharov, Alexander, Mykhailo Ilchenko, Sergii Rozenko, and Ludmila Pinchuk. "Planar Bandpass Filters with Mixed Couplings." In Advances in Information and Communication Technology and Systems. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58359-0_21.

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Mazierska, Janina, and Mohan Jacob. "High-Temperature Superconducting Planar Filters for Wireless Communication." In Novel Technologies for Microwave and Millimeter — Wave Applications. Springer US, 2004. http://dx.doi.org/10.1007/978-1-4757-4156-8_6.

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Ulas, Cihan, and Hakan Temeltas. "Planar-Feature Based 3D SLAM Using Randomized Sigma Point Kalman Filters." In Advances in Estimation, Navigation, and Spacecraft Control. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44785-7_7.

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Nedelchev, Marin, Zlatica Marinkovic, and Alexander Kolev. "ANN Modelling of Planar Filters Using Square Open Loop DGS Resonators." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23976-3_32.

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Sans, Marc, Jordi Selga, Ana Rodríguez, et al. "Unattended Design of Wideband Planar Filters Using a Two-Step Aggressive Space Mapping (ASM) Optimization Algorithm." In Simulation-Driven Modeling and Optimization. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27517-8_6.

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Tong, Flora, and Chikezie Nwaoha. "Filters and Membranes." In Process Plant Equipment. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118162569.ch6.

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Sevcik, L. "The Design of the Device for the Manufacture of Planar Filter." In The Latest Methods of Construction Design. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22762-7_14.

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Nicot, Philippe C., Nicolas Morison, and Marie Mermier. "Optical Filters against Grey Mould of Greenhouse Crops." In Physical Control Methods in Plant Protection. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04584-8_9.

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Utku, H., H. Koksel, and S. Kayhan. "Classification of wheat grains by digital image analysis using statistical filters." In Developments in Plant Breeding. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-4896-2_32.

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Conference papers on the topic "Planar filters"

1

Excell, P. S. "Compact multi-meander superconducting planar dual-mode filters." In IEE Seminar Microwave Filters and Multiplexers. IEE, 2000. http://dx.doi.org/10.1049/ic:20000652.

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"WE3E: Wideband Planar Filters." In 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380043.

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Menzel, Wolfgang, Lei Zhu, Ke Wu, and Frank Bogelsack. "Compact Broadband Planar Filters." In 31st European Microwave Conference, 2001. IEEE, 2001. http://dx.doi.org/10.1109/euma.2001.338962.

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Loeches-Sanchez, Raul, Dimitra Psychogiou, Roberto Gomez-Garcia, and Dimitrios Peroulis. "Miniaturized signal-interference planar filters." In 2015 European Microwave Conference (EuMC 2015). IEEE, 2015. http://dx.doi.org/10.1109/eumc.2015.7345820.

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Greda, Lukasz A., and Reinhold Pregla. "Modeling of Planar Microwave Filters." In 33rd European Microwave Conference, 2003. IEEE, 2003. http://dx.doi.org/10.1109/euma.2003.340840.

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Greda, L. A., and R. Pregla. "Modeling of planar microwave filters." In 33rd European Microwave Conference Proceedings. IEEE, 2003. http://dx.doi.org/10.1109/eumc.2003.177663.

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Abbosh, A., M. Bialkowski, and D. Thiel. "Design of planar wide bandpass filters from wideband planar antennas." In amp; USNC/URSI National Radio Science Meeting. IEEE, 2009. http://dx.doi.org/10.1109/aps.2009.5172264.

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"TH1B: Non-Planar Filters and Multiplexers." In 2007 IEEE/MTT-S International Microwave Symposium. IEEE, 2007. http://dx.doi.org/10.1109/mwsym.2007.380424.

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Levy, M., L. Eldada, R. Scarmozzino, R. M. Osgood, P. S. D. Lin, and F. Tong. "Sub-Angstrom Planar Channel-Dropping Filters." In Integrated Photonics Research. OSA, 1993. http://dx.doi.org/10.1364/ipr.1993.itub2.

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"TH2A: Innovative planar filters and multiplexers." In 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011. IEEE, 2011. http://dx.doi.org/10.1109/mwsym.2011.5973148.

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Reports on the topic "Planar filters"

1

Kilpatrick, L. L. Technical task plan for testing filter box sorbent-paint filter test. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10107714.

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Wilson, K. B., J. C. Haas, and M. B. Eshelman. Granular-bed and ceramic candle filters in commercial plants: A comparison. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10107775.

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Nash, C. A., S. A. Budenstein, and M. D. Boersma. Late Wash Filter Demonstration Unit program plan. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/6690247.

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Nash, C. A., S. A. Budenstein, and M. D. Boersma. Late Wash Filter Demonstration Unit program plan. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10125680.

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Moore, Murray, and Kirk Reeves. Nuclear Canister Filter Test System UPC Plan. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1764123.

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Ritter, G. A. ,. Westinghouse Hanford. B-Plant D-Filter detector system qualification test report. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/657442.

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Kirchner, K. N., K. G. Cummings, W. C. Leck, and J. K. Fretthold. Technology development: HEPA filter service life test plan. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/73030.

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Howard, Heidi, Chad Helmle, Raina Dwivedi, and Daniel Gambill. Stormwater Management and Optimization Toolbox. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/39480.

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As stormwater regulations for hydrologic and water quality control become increasingly stringent, Department of Defense (DoD) facilities are faced with the daunting task of complying with multiple laws and regulations. This often requires facilities to plan, design, and implement structural best management practices (BMPs) to capture, filter, and/or infiltrate runoff—requirements that can be complicated, contradictory, and difficult to plan. This project demonstrated the Stormwater Management Optimization Toolbox (SMOT), a spreadsheet-based tool that effectively analyzes and plans for compliance to the Energy Independence and Security Act (EISA) of 2007 pre-hydrologic conditions through BMP implementation, resulting in potential cost savings by reducing BMP sizes while simultaneously achieving compliance with multiple objectives. SMOT identifies the most cost-effective modeling method based on an installation’s local conditions (soils, rainfall patterns, drainage network, and regulatory requirements). The work first demonstrated that the Model Selection Tool (MST) recommendation accurately results in the minimum BMP cost for 45 facilities of widely varying climatic and regional conditions, and then demonstrated SMOT at two facilities.
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Chakravartty, A. C. HEPA filter leaching concept validation trials at the Idaho Chemical Processing Plant. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/114015.

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DICK, J. D. Test plan for N2 HEPA filters assembly shop stock used on PFP E4 exhaust system. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/798024.

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