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Статті в журналах з теми "Open resonators"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Nelin, E. A. "Resonator With Reflectors Based on Open-Circuited Stub." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 98 (December 30, 2024): 66–72. https://doi.org/10.20535/radap.2024.98.66-72.

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Анотація:

Introduction. A two-stub resonator is considered as an analogue of a parallel resonant circuit. Another scheme of the resonator is similar to the Fabry-Perot optical resonator, formed by a resonator cavity and two reflectors. In the presented paper it is proposed a combined reflector formed by a stepped-impedance one and an open-circuited stub. Resonators with such reflectors have a higher quality factor Q than those known based on open-circuited stubs and than the Fabry-Perot resonator. 1 Half wavelength resonator. One of the analogues of the Fabry-Perot resonator is a half wavelength section

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2

Nelin, E. A., and Yu V. Nepochatykh. "Increasing Quality Factor of Two-Stub Resonator." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 94 (December 30, 2023): 58–63. https://doi.org/10.20535/radap.2023.94.58-63.

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Анотація:

Introduction. Narrowband filters and oscillators based on resonators are used in radiolocation, wireless and mobile communications, testing and measuring equipment. Coupled resonators form a bandpass characteristic. Resonance structures based on transmission line stubs are widely used, in particular, a two-stub resonator with open-circuited stubs. The advantages of such a resonator are a high steepness of the transmission response and the presence of zeros near the passband. The purpose of this paper is to increase two-stub resonator quality factor by replacing conventional open-circuited one-

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3

Trubin, A. A. "Mutual Coupling Coefficients of Rotated Rectangular Dielectric Resonators in Open Space." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 88 (June 30, 2022): 60–68. https://doi.org/10.20535/radap.2022.88.60-68.

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The coefficients of mutual coupling of rectangular dielectric resonators in open space are calculated under the condition of their rotation relative to one of the axes of a given rectangular coordinate system. Analytical formulas for complex coupling coefficients are obtained. The expressions found give complete information about the frequencies and Q-factor of coupled oscillations of dielectric resonators. The dependences of the coupling coefficients on the angles of rotation and spatial coordinates of resonators in the case of excitation of the main magnetic types of natural oscillations in

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4

El-Busaidy, Said, Bernd Baumann, Marcus Wolff, and Lars Duggen. "Shape Optimization of an Open Photoacoustic Resonator." Applied Sciences 11, no. 6 (2021): 2571. http://dx.doi.org/10.3390/app11062571.

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Photoacoustic (PA) measurements with open resonators usually provide poor detection sensitivity due to signal leakage at the resonator opening. We have recently demonstrated three different approaches for modelling the photoacoustic signal of open resonators. In this work, one of the approaches is applied for the optimization of the geometry of the T-shaped resonator for improved signal strength and thus sensitivity. The results from the numerical optimization show an increase in the photoacoustic signal by a factor of approximately 7.23. They are confirmed using numerical methods other than t

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5

Obadiah, Ali Nyangwarimam, Mohamad Rijal Hamid, Mohamad Kamal Abd Rahim, and Noor Asniza Murad. "A Compact Bandpass Filter Using A T-Shaped Loaded Open-ended Stub Resonator." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 3 (2018): 867. http://dx.doi.org/10.11591/ijeecs.v10.i3.pp867-874.

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This paper proposes a compact bandpass filter using a loaded open-ended T-shaped stub. The open-ended T-shaped stub is loaded with vertical resonators placed across. The key advantage of using vertical resonators in the design is the simplicity and low insertion loss it provides. The structure used is an open-ended stub attached on one end to the transmission line (λ/2) to form a T-shaped resonator (λ/4) having vertical resonators placed across. The vertical resonator position alters the position at which the transmission zero occurs. A pair of the T-shaped resonator is placed on parallel side

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6

Ali, Nyangwarimam Obadiah, Rijal Hamid Mohamad, Kamal Abd Rahim Mohamad, and Asniza Murad Noor. "A Compact Bandpass Filter Using a T-shaped Loaded OpenEnded Stub Resonator." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 3 (2018): 867–74. https://doi.org/10.11591/ijeecs.v10.i3.pp867-874.

Повний текст джерела

Анотація:

This paper proposes a compact bandpass filter using a loaded open-ended Tshaped stub. The open-ended T-shaped stub is loaded with vertical resonators placed across. The key advantage of using vertical resonators in the design is the simplicity and low insertion loss it provides. The structure used is an open-ended stub attached on one end to the transmission line (λ/2) to form a T-shaped resonator (λ/4) having vertical resonators placed across. The vertical resonator position alters the position at which the transmission zero occurs. A pair of the T-shaped resonator is placed on

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7

Long, T., M. J. Brennan, and S. J. Elliott. "Design of smart machinery installations to reduce transmitted vibrations by adaptive modification of internal forces." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 212, no. 3 (1998): 215–28. http://dx.doi.org/10.1243/0959651981539415.

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There is a requirement to isolate machinery from their surroundings to reduce the transmission of noise and vibration. Reducing the input disturbance of a system can reduce vibration levels, but this is not always a feasible option. One of the simplest ways to overcome these problems is to retrofit a vibration attenuation device. The method used for vibration isolation discussed in this paper is semi-active control and involves using tunable resonators at the mounting positions. These resonators operate by continually adjusting their characteristics such that a large force is generated, achiev

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8

E., Mohd, and H. Dahlan S. "Miniaturization of Resonator based on Moore Fractal." TELKOMNIKA Telecommunication, Computing, Electronics and Control 15, no. 3 (2017): 1433–39. https://doi.org/10.12928/TELKOMNIKA.v15i3.7211.

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This paper presents the simulation and fabrication of miniaturized half wavelength resonator design using Moore fractal iteration technique. These resonators have been prepared for wireless application at a centre frequency of 2.45GHz using a substrate with dielectric constant of 2.2. The size and performance are compared with the conventional half wavelength open line resonator. It can be shown that the Moore fractal iteration technique able to reduce 46% of the size of conventional half wavelength resonator through first iteration, and 30% through second iteration while maintaining the reson

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9

Dian, Widi Astuti, Ramadhan Putra Rizki, Muslim, and Alaydrus Mudrik. "Substrate integrated waveguide bandpass filter for short range device application using rectangular open loop resonator." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 5 (2021): 3747–56. https://doi.org/10.11591/ijece.v11i5.pp3747-3756.

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Анотація:

The substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave application. It because of SIW structure can integrate with any component in one substrate than others structure. A kind components using SIW structure is a filter component, especially bandpass filter. This research recommended SIW bandpass filter using rectangular open loop resonator for giving more selectivity of filter. It can be implemented for short range device (SRD) application in frequency region 2.4-2.483 GHz. Two types of SIW bandpass filter are propos

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10

Zhang, Zhuo-Zhi, Xiang-Xiang Song, Gang Luo, et al. "Coherent phonon dynamics in spatially separated graphene mechanical resonators." Proceedings of the National Academy of Sciences 117, no. 11 (2020): 5582–87. http://dx.doi.org/10.1073/pnas.1916978117.

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Vibrational modes in mechanical resonators provide a promising candidate to interface and manipulate classical and quantum information. The observation of coherent dynamics between distant mechanical resonators can be a key step toward scalable phonon-based applications. Here we report tunable coherent phonon dynamics with an architecture comprising three graphene mechanical resonators coupled in series, where all resonators can be manipulated by electrical signals on control gates. We demonstrate coherent Rabi oscillations between spatially separated resonators indirectly coupled via an inter

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11

Ma, Xing-Bing, and Ting Jiang. "Wideband Bandpass Filter with High Selectivity and an Adjustable Notched-band Adopting a Multi-mode Resonator." Frequenz 72, no. 5-6 (2018): 237–43. http://dx.doi.org/10.1515/freq-2016-0383.

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AbstractA wideband bandpass filter (BPF) with an adjustable notched-band and high selectivity is proposed. The proposed BPF consists of a multi-mode resonator (MMR), twoλ/2 resonators, and I/O feed lines with 50 ohm characteristic impedance. The MMR, connected as a whole by a wide stub, is composed of one I-shaped resonator and two open-loop resonators. Tightly coupling is built between MMR andλ/2 resonators. I/O feed lines are directly connected with twoλ/2 resonators, respectively. Due to the use of tapped-line coupling, one transmission zero (TZ) is formed near low-edge of aim passband. Hig

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12

Basit, Abdul, Muhammad Irfan Khattak, Jamel Nebhen, Atif Jan, and Gulzar Ahmad. "Investigation of external quality factor and coupling coefficient for a novel SIR based microstrip tri-band bandpass filter." PLOS ONE 16, no. 10 (2021): e0258386. http://dx.doi.org/10.1371/journal.pone.0258386.

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In this article, a new method is developed to design a three-band miniaturized bandpass filter (BPF) that uses two asymmetrically coupled resonators with one step discontinuity and open-circuited uniform impedance resonator (UIR) to achieve Global Interoperability with Microwave Access (WiMAX) and Radio Frequency Identification (RFID) applications. First, a pair of asymmetrical step impedance resonators (ASIR) is used to implement a dual band filter, then a half wavelength uniform impedance resonator is added below to the transmission line to achieve a triple band response. The proposed filter

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13

Zhao, Xi-Ning, and Xiao-Dong Yang. "Elastic Wave Properties of an Adaptive Electromechanical Metamaterial Beam." Shock and Vibration 2020 (October 20, 2020): 1–14. http://dx.doi.org/10.1155/2020/8834856.

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An adaptive metamaterial beam with a couple of electromechanical resonators in each unit cell is proposed in this study to open Bragg bandgap or locally resonant bandgap for flexural wave attenuation in Euler–Bernoulli beams. The electromechanical resonator is composed of a piezoelectric layer with segmented electrodes and shunt circuits, which affect the dynamic equivalent stiffness. It is illustrated that there is only a Bragg bandgap when the circuits of the two adjacent resonators are approximate to a short circuit or open circuit, and the locally resonant bandgap will be generated in the

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14

Du, Zhengjun, and Jin Pan. "Half-Mode Dielectric-Filled Resonator and Its Application in Bandpass Filters." Electronics 14, no. 8 (2025): 1488. https://doi.org/10.3390/electronics14081488.

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This article presents a novel design for half-mode (HM) dielectric-filled resonators based on the concept of virtual magnetic walls (VMWs). The underlying principles of the HM resonator are explored, along with a design methodology for implementing the VMW through an open aperture (OA) with no restrictions on the aspect ratio of the dielectric-filled resonator. The VMW implementation is analyzed using transmission line theory. Compared to conventional full-mode (FM) dielectric-filled resonators, the proposed HM dielectric-filled resonator achieves a 37% reduction in both size and weight. The H

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15

Astuti, Dian Widi, Rizki Ramadhan Putra, Muslim Muslim, and Mudrik Alaydrus. "Substrate integrated waveguide bandpass filter for short range device application using rectangular open loop resonator." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 5 (2021): 3747. http://dx.doi.org/10.11591/ijece.v11i5.pp3747-3756.

Повний текст джерела

Анотація:

The substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave application. It because of SIW structure can integrate with any component in one substrate than others structure. A kind components using SIW structure is a filter component, especialy bandpass filter. This research recommended SIW bandpass filter using rectangular open loop resonator for giving more selectivity of filter. It can be implemented for short range device (SRD) application in frequency region 2.4 - 2.483 GHz. Two types of SIW bandpass filter are propo

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16

Abdul-Niby, M., M. Farhat, M. Nahas, and Μ. Μ. Alomari. "A Compact Tri-Band Bandpass Filter with High Out-of-Band Rejection." Engineering, Technology & Applied Science Research 7, no. 4 (2017): 1786–90. http://dx.doi.org/10.48084/etasr.1209.

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This paper presents a planar tri-band bandpass filter with high out-of-band rejection over a wide band. The filter is based on two pairs of λ/4 resonators embedded inside an open loop ring resonator without any size increase, where each pair of resonators are electromagnetically coupled to each other and the feedlines. This results in the excitations of passbands, where the first passband is generated by the open loop resonators. The second and the third passbands are excited by λ/4 resonators. The proposed technique provides sufficient degrees of freedom to control the center frequency and ba

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17

Abdul-Niby, M., M. Farhat, M. Nahas, and Μ. Μ. Alomari. "A Compact Tri-Band Bandpass Filter with High Out-of-Band Rejection." Engineering, Technology & Applied Science Research 7, no. 4 (2017): 1786–90. https://doi.org/10.5281/zenodo.844293.

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Анотація:

This paper presents a planar tri-band bandpass filter with high out-of-band rejection over a wide band. The filter is based on two pairs of λ/4 resonators embedded inside an open loop ring resonator without any size increase, where each pair of resonators are electromagnetically coupled to each other and the feedlines. This results in the excitations of passbands, where the first passband is generated by the open loop resonators. The second and the third passbands are excited by λ/4 resonators. The proposed technique provides sufficient degrees of freedom to control the center frequency and ba

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18

Gevorkyan, Vladimir M., Yury A. Kazantsev, and Aleksandr V. Shutov. "Method for measuring the Q-factor of miniature open dielectric resonators at ultrahigh frequencies." Izmeritel`naya Tekhnika, no. 6 (2021): 29–36. http://dx.doi.org/10.32446/0368-1025it.2021-6-29-36.

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Анотація:

A simple algorithm for reliably determining the Q-factor of an open dielectric resonator made of a material with a tgδ less than 0.0001 in the shielded region is presented, based on measuring the parameters of an electromagnetically coupled system of bulk metal and open dielectric resonators. The analytical substantiation of the considered method for determining the Q-factor of an open dielectric resonator in electrodynamic and electrotechnical representations is carried out. The variants of the influence of the metal volume on the effective Q-factor of an open dielectric resonator depending o

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19

Boutejdar, A., and S. D. Bennani. "Design and Fabrication of Tri-Stopband Bandstop Filters Using Cascaded and Multi-Armed Methods." Advanced Electromagnetics 6, no. 3 (2017): 18. http://dx.doi.org/10.7716/aem.v6i3.524.

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In this paper, we proposed a compact C-open-loop ring resonator and its equivalent circuit. The second cascaded BSF are designed using this simple C-ring resonator. The double ring BPF consists of two cascaded C-ring resonators, which are placed on the RO4003 substrate, while the other triple BSF structure consists of tree cascaded C-ring resonators, which are connected with input and output through microstrip feed lines. The both filters are simulated, optimized and partially realized using MWR simulator and Anritsu E5072A vector network analyzer VNA. In order to reduce the size and to improv

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20

Lyu, Ming, Xiang Zhi, Na Yan, and Rongjian Sun. "Experimental Investigation of Mode Localization’s Bifurcation Topology Transfer in Electrostatically Coupled Tuning Fork Resonators." Sensors 24, no. 5 (2024): 1563. http://dx.doi.org/10.3390/s24051563.

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Bifurcation topology transfer phenomena in the presence of mode localization are investigated using double-ended fixed electrostatically coupled tuning fork resonators. An analytical model is proposed for the coupled tuning fork resonators, and the effects of feedthrough capacitance on the structure are also analyzed and eliminated by means of data post-processing. Then, an open-loop experimental platform is established, when the system is in balance state, the quality factor is obtained under test as Q = 9858, and comparison of the experiment with numerical simulation results is in good agree

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21

Zhou, Ziling, Jin Shi, Gu Liu, Kai Xu, and Ruirui Jiang. "A Bidirectional Quasi-Endfire Patch Antenna with Low Elevation Angle." Micromachines 15, no. 6 (2024): 777. http://dx.doi.org/10.3390/mi15060777.

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A bidirectional quasi-endfire patch antenna with a low elevation angle has promising applications for wireless communication systems that are vehicle-based, airborne, and shipborne. In this paper, the shortened patch resonators and open patch resonator are integrated to form a bidirectional quasi-endfire patch antenna with low elevation angle. The open patch resonator operates with a TM20 mode to realize bidirectional radiation. The two shortened patch resonators operate with a TM01 mode coupled with a TM20 mode to control the phase difference between them at a suitable angle, so that the shor

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22

Breslavets, A. A., Z. E. Eremenko, G. O. Rudnev, et al. "Small-sized x-band open resonator for wide-range permittivity measurements of solid-state dielectrics." Low Temperature Physics 48, no. 12 (2022): 1055–61. http://dx.doi.org/10.1063/10.0015115.

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A study using computer simulation of a compact two-mirror symmetric open resonator for use in the X band for measurements of the complex permittivity of flat samples was carried out. The possibilities of minimizing the dimensions of an open resonator with a loaded quality factor of about 104 are investigated. Comparative studies of various coupling elements of an open resonator with a waveguide are carried out. It is shown that coupling elements in the form of a slot on the mirror, which smoothly passes into a standard waveguide, have advantages for use in open resonator for permittivity measu

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23

Mondal, Pratik, Susanta Parui, and Rajesh Bera. "Finite Ground CB-CPW Bandpass Filter using Vertically Installed Coupled Open-ended Stubs." Applied Computational Electromagnetics Society 35, no. 9 (2020): 1053–58. http://dx.doi.org/10.47037/2020.aces.j.350911.

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In this paper, a conductor backed coplanar waveguide (CB-CPW) 3rd order bandpass filter is designed using coupled open-ended stub resonator placed vertically to the signal line. Vertically loaded open ended stubs are designed at quarter wavelength so as to behave like a short circuit at the input terminal thus giving a band-accepted response with lesser metallic area or minimum size. Four such coupled open ended resonators are placed in series and also in closely manner to provide greater field confinement of the proposed bandpass filter. The bandpass filter is designed for a center frequency

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24

Wang, Jianguo, Philip Rubini, Qin Qin, and Brian Houston. "A Model to Predict Acoustic Resonant Frequencies of Distributed Helmholtz Resonators on Gas Turbine Engines." Applied Sciences 9, no. 7 (2019): 1419. http://dx.doi.org/10.3390/app9071419.

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Helmholtz resonators, traditionally designed as a narrow neck backed by a cavity, are widely applied to attenuate combustion instabilities in gas turbine engines. The use of multiple small holes with an equivalent open area to that of a single neck has been found to be able to significantly improve the noise damping bandwidth. This type of resonator is often referred to as “distributed Helmholtz resonator”. When multiple holes are employed, interactions between acoustic radiations from neighboring holes changes the resonance frequency of the resonator. In this work, the resonance frequencies f

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25

Manenkov, Aleksandr A., Vladimir P. Bykov, and N. V. Kuleshov. "On open electromagnetic resonators: relation between interferometers and resonators." Quantum Electronics 40, no. 3 (2010): 217–18. http://dx.doi.org/10.1070/qe2010v040n03abeh014152.

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26

Dzyubenko, M. I., V. A. Maslov, V. P. Radionov, and A. A. Fomin. "Methods for adjusting feedback in terahertz lasers." Radiotekhnika, no. 203 (December 23, 2020): 170–75. http://dx.doi.org/10.30837/rt.2020.4.203.17.

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The optimal feedback coefficient in an active open resonator is an important condition for high lasing efficiency. For precise selection of the optimum communication and maintaining the optimum in all modes of laser operation, the ability to adjust smoothly the communication is required. Terahertz (THz) lasers have a number of features that one should take into account when choosing feedback control schemes. The paper presents a review and comparative analysis of the schemes of laser resonators (THz) in the range with a smoothly controlled radiation output. The authors consider both long known

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27

Vlasov, S. N., and E. V. Koposova. "Theory of coupled open resonators." Physics of Wave Phenomena 18, no. 1 (2010): 7–13. http://dx.doi.org/10.3103/s1541308x10010024.

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28

Rossing, Thomas. "Open and closed tube resonators." Physics Teacher 24, no. 8 (1986): 459. http://dx.doi.org/10.1119/1.2342087.

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29

El-Busaidy, Said Ali Said, Bernd Baumann, Marcus Wolff, and Lars Duggen. "Modelling of open photoacoustic resonators." Photoacoustics 18 (June 2020): 100161. http://dx.doi.org/10.1016/j.pacs.2020.100161.

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30

Veremey, V. V., A. A. Kostenko, I. K. Kuz'michev, A. E. Poyedinchuk, and G. I. Khlopov. "Excitation loss of open resonators." International Journal of Infrared and Millimeter Waves 15, no. 7 (1994): 1283–95. http://dx.doi.org/10.1007/bf02096082.

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31

Pogarsky, S. "A COMPOSITION PATCH ANTENNA." Radio physics and radio astronomy 29, no. 4 (2024): 308–16. https://doi.org/10.15407/rpra29.04.308.

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Анотація:

Subject and Purpose. The paper presents results of numerical simulation of a composition patch antenna with a complex form factor. The design combines two structures, specifically, a disc and an annular resonator. The annular resonator is fed via a coplanar structure that involves cut-ins of different geometries. The feed connections are effectuated pointwise, such as to provide for galvanic contact between the central conductor of the coplanar line and the annular resonator, owing to the distributed electromagnetic coupling of the annular resonator and the aperture of the coplanar line’s oute

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32

Bandyopadhyay, Anjan, Pankaj Sarkar, Tapas Mondal, and Rowdra Ghatak. "A high selective tri-band bandpass filter with switchable passband states." International Journal of Microwave and Wireless Technologies 12, no. 2 (2019): 103–8. http://dx.doi.org/10.1017/s1759078719001053.

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AbstractA new class of switchable bandpass filter using PIN diodes is presented in this paper. The design aims at achieving a multistate switchable bandpass filtering characteristics between the passbands centered at 2.4, 3.5, and 5.2 GHz. The proposed filter is designed by assembling two λg/2 open-ended and four short-ended λg/4 uniform impedance resonators. The open-ended resonator generates a fixed passband at 3.5 GHz, whereas the short-ended resonators loaded with PIN diodes are independently controlling the ON and OFF characteristics of the passband centered at 2.4 and 5.2 GHz. The transm

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33

Kuzmychov, I., O. Lukash, O. Senkevych, and O. Gribovsky. "SURFACE OSCILLATIONS IN OPEN RESONATORS WITH CURVILINEAR REFLECTORS." Radio physics and radio astronomy 30, no. 1 (2025): 065–73. https://doi.org/10.15407/rpra30.01.065.

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Subject and Purpose. The subject of the work is the behavior of "bouncing ball" oscillations and surface oscillations in open resonant systems with curvilinear reflectors embedded in the waveguide transmission line. We seek to determine physical patterns and features of the interaction between volume "bouncing ball" oscillations and surface oscillations in open resonant systems with curvilinear reflectors. Methods and Methodology. Basic quasi-optical techniques were employed. The electric field structures of considered oscillation types were measured using the probe-induced perturbation method

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34

Fesina, Mikhail, Igor Deryabin, and Gorina Larisa. "ON THE POROUS SOUND-ABSORBING PANELS WITH THE END LOW-FREQUENCY RESONANT CAVITIES." Akustika 32 (March 1, 2019): 10–16. http://dx.doi.org/10.36336/akustika20193210.

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Technical rooms of the construction units with noise generating technical objects inside require the use acoustic boards. To provide more effective dissipation of low-frequency sound energy, the acoustic boards made of porous sound-absorbing structures are used; and volume structural composition of these boards can contain hollow resonator elements. They can be represented as Helmholtz acoustic resonator (RIII), half wave (RII), and quarter wave (RI) acoustic resonators. Their distinctive feature is that their chamber, tube and throat parts can be made of non-air-blown sound transparent elasti

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Noman, Muhammad, Usman A. Haider, Hidayat Ullah, Muhammad Ikram, Hatem Rmili, and Farooq A. Tahir. "High-Capacity Double-Sided Square-Mesh-Type Chipless RFID Tags." Electronics 12, no. 6 (2023): 1371. http://dx.doi.org/10.3390/electronics12061371.

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This paper presents a novel methodology for designing high-capacity frequency domain chipless RFID tags based on the backscattering principle. The tag consists of multiple square open-loop resonators loaded with a varying number of square metallic patches to form a mesh structure. Thus, in contrast to conventional designs, the overall physical size of each resonator remains fixed and does not change with respect to its operating resonant frequency. The RCS response of the proposed tag can be easily manipulated by varying the loading factor of each resonator. The tag size is further miniaturize

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Papadakis, Nikolaos M., and Georgios E. Stavroulakis. "Tunable Helmholtz Resonators Using Multiple Necks." Micromachines 14, no. 10 (2023): 1932. http://dx.doi.org/10.3390/mi14101932.

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One of the uses of Helmholtz resonators is as sound absorbers for room acoustic applications, especially for the low frequency range. Their efficiency is centered around their resonance frequency which mainly depends on elements of their geometry such as the resonator volume and neck dimensions. Incorporating additional necks on the body of a Helmholtz resonator (depending on whether they are open or closed) has been found to alter the resulting resonance frequency. For this study, tunable Helmholtz resonators to multiple resonance frequencies, are proposed and investigated utilizing additiona

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Nelin, E. A., and Yu V. Nepochatykh. "Bandpass Filters on Orthogonal Resonators." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 90 (December 30, 2022): 31–36. https://doi.org/10.20535/radap.2022.90.31-36.

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Introduction. The rapid development of radioengineering, in particular telecommunication, systems leads to a constant tightening of requirements for bandpass filters, and this, in turn, the search for new, more efficient design solutions. In the article, a structure based on two orthogonal resonators (OR) is proposed as the basic structure of a bandpass filter. The transmission response (TR) of the OR-structure and filters on it has been studied.1 Structure based on OR. The structure consists of two resonators.The longitudinal (relative to the direction of wave propagation) resonator is formed

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Ibrahim, Ahmed A., Wael A. E. Ali, and Hesham A. Mohamed. "Bandpass/bandstop switching with tunable pass band operation based on split ring and open loop resonators." Journal of Instrumentation 17, no. 10 (2022): P10026. http://dx.doi.org/10.1088/1748-0221/17/10/p10026.

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Abstract In this work, a bandpass filter (BPF) using a split ring and open-loop resonators for wireless applications is discussed. The split-ring resonator (SRR) is the main part of the band stop filter (BSF) as a preliminary design for obtaining a band stop behavior. The proposed filter is printed on a RO4003 substrate with a 3.55 dielectric constant and a total size of 30 × 30 × 0.813 mm3. First, the SRR BSF is presented to operate at a center frequency of 5 GHz then an open loop resonator is added between input/output ports to achieve an extra band stop region to generate a bandpass behavio

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39

Torrent, Daniel, Marc Martí Sabaté, Junfei Li, Steven Cummer, and Bahram Djafari-Rouhani. "Bound states in the continuum in clusters of acoustic and elastic resonators." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A32. http://dx.doi.org/10.1121/10.0026684.

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This study investigates the localization of waves within highly symmetric clusters of scatterers, focusing on the resonances that emerge when resonators are strategically positioned along the perimeter of a circumference. Notably, the quality factor of these resonances exhibits a noteworthy enhancement with an increasing number of resonators. We demonstrate that, specifically for flexural waves, as the number of scatterers approaches infinity, a defining condition emerges for the formation of bound states in the continuum (BICs). Additionally, we present an analytical expression for the design

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40

Kottapalli, Shravan, Remco van de Meerendonk, Nicholas Waterson, Gunes Nakiboglu, Avraham Hirschberg, and David M. J. Smeulders. "Analytical modelling and experimental validation of compliance-based low-frequency resonators for water circuits." Acta Acustica 6 (2022): 56. http://dx.doi.org/10.1051/aacus/2022050.

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Transmission losses of compact compliance-based resonators in water circuits are investigated. Experiments are performed to measure the anechoic transmission losses (TLan) of flexible-plate resonators and a gas resonator designed for frequencies between 10 and 100 Hz. The measurements are compared to theoretical results based on a lumped-element model and a finite-element model. The TLan is measured using a robust form of the multi-microphone method, which gave identical results for open and closed pipe acoustic terminations at the transmission side of the setup. When an estimate of the reflec

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Pochanina, Irina E., and Nataliya P. Yashina. "Electrodynamic Properties of Open Wavegide Resonators." Electromagnetics 13, no. 3 (1993): 289–300. http://dx.doi.org/10.1080/02726349308908351.

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Barroso, J. J., P. J. Castro, and R. A. Corrêa. "Resonance in open coaxial cylindrical resonators." International Journal of Infrared and Millimeter Waves 17, no. 5 (1996): 921–32. http://dx.doi.org/10.1007/bf02101400.

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Vlasov, S. N., E. V. Koposova, S. E. Myasnikova, and V. V. Parshin. "Open resonators with thin dielectric plates." Radiophysics and Quantum Electronics 49, no. 3 (2006): 196–202. http://dx.doi.org/10.1007/s11141-006-0052-y.

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44

Ginzburg, Pavel. "Accelerating spontaneous emission in open resonators." Annalen der Physik 528, no. 7-8 (2016): 571–79. http://dx.doi.org/10.1002/andp.201500317.

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45

Leykam, Daniel, and Luqi Yuan. "Topological phases in ring resonators: recent progress and future prospects." Nanophotonics 9, no. 15 (2020): 4473–87. http://dx.doi.org/10.1515/nanoph-2020-0415.

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AbstractTopological photonics has emerged as a novel paradigm for the design of electromagnetic systems from microwaves to nanophotonics. Studies to date have largely focused on the demonstration of fundamental concepts, such as nonreciprocity and waveguiding protected against fabrication disorder. Moving forward, there is a pressing need to identify applications where topological designs can lead to useful improvements in device performance. Here, we review applications of topological photonics to ring resonator–based systems, including one- and two-dimensional resonator arrays, and dynamical

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46

Salif, Nabouna Dembele, Zhang Jingfu Bao Ting, Bukuru Denis, and Ammar Khan Muhammad. "Compact Dual-Band Bandpass Filter Based on Stub-Loaded Rectangular Loop Stepped Impedance Resonator." International Journal of Electromagnetics ( IJEL ) 2, no. 1 (2019): 1 to 11. https://doi.org/10.5281/zenodo.3647944.

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This work presents a compact dual-band bandpass filter (BPF) based on stub-loaded rectangular loop stepped impedance resonator (SLRLSIR). The proposed SLRLSIR consists of two outer open-circuited and two inner open-circuited stubs, which are designed to the central sides of the rectangular loop resonator. Owing to its symmetry, even-and odd-mode analysis methods are applied to deduce the equivalent-circuit equations and to justify the structural design. The second passband can be easily tuned by changing the two inner open-circuited stubs when the first passband is fixed at a desirable frequen

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47

Barmashe, Pravin, and D. K. Srivastava. "Design and Optimization of Tri-Band Open Loop Resonator Filter for BT, WiMAX, WLAN and Wi-Fi Applications." International Journal of Emerging Technology and Advanced Engineering 12, no. 4 (2022): 181–89. http://dx.doi.org/10.46338/ijetae0422_22.

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The consumer wireless frequency spectrum is getting denser and overlapping so may signals can cause interference and less data speed. There is need to either switch to new channel or to use newer technologies available. As per FCC new 6GHz band is now open for WLAN & Wi-Fi networks and to filter out other signals a microwave filter could the best mate. This paper proposed a tri-band microstrip filter having rectangular resonator with open loop has been evaluated. Because of its tiny size, lighter weight, cheaper cost, and superior performance, microstrip filters are often chosen over lumpe

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Paredes, F., G. Zamora, S. Zufanelli, F. J. Herraiz-Martínez, J. Bonache, and F. Martín. "Recent Advances in Multiband Printed Antennas Based on Metamaterial Loading." Advances in OptoElectronics 2012 (October 22, 2012): 1–12. http://dx.doi.org/10.1155/2012/968780.

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It is shown that printed antennas loaded with metamaterial resonators can be designed to exhibit multiband functionality. Two different antenna types and metamaterial loading are considered: (i) printed dipoles or monopoles loaded with open complementary split ring resonators (OCSRRs) and (ii) meander line or folded dipole antennas loaded with split ring resonators (SRRs) or spiral resonators (SRs). In the first case, multiband operation is achieved by series connecting one or more OCSRRs within the dipole/monopole. Such resonators force opens at their positions, and by locating them at a quar

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49

Chatterjee, Eric, Daniel Soh, and Matt Eichenfield. "Optimal quantum transfer from input flying qubit to lossy quantum memory." Journal of Physics A: Mathematical and Theoretical 55, no. 10 (2022): 105302. http://dx.doi.org/10.1088/1751-8121/ac4fa6.

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Abstract In a quantum network, a key challenge is to minimize the direct reflection of flying qubits as they couple to stationary, resonator-based memory qubits, as the reflected amplitude represents state transfer infidelity that cannot be directly recovered. Optimizing the transfer fidelity can be accomplished by dynamically varying the resonator’s coupling rate to the flying qubit field. Here, we analytically derive the optimal coupling rate profile in the presence of intrinsic loss of the quantum memory using an open quantum systems method that can account for intrinsic resonator losses. W

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Jian, Yupei, Yincheng Shen, Guobiao Hu, Lihua Tang, and Kean Aw. "Vibration attenuation band tuning by active stiffness control of local resonators of metamaterials." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 8 (2023): 890–97. http://dx.doi.org/10.3397/in_2023_0141.

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This paper presents a design of metamaterials with a broader bandgap by active stiffness control of local resonators. A series of cantilever beams are connected to the host structure, serving as local resonators to open the bandgap for vibration attenuation. The piezoelectric transducers bonded on the cantilever beams are shunted to a negative capacitance-negative inductance series circuit (NCNL). The variation of the effective modulus of the piezoelectric sample when connected to NCNL is discussed. In addition, the effect of the NC circuit and negative capacitance in series with positive indu

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