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Journal articles on the topic 'Wide operating frequency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Pan, Yu Fei, Shao Yong Zheng, Yong Mei Pan, Yuan Xin Li, and Yun Liang Long. "A Frequency Tunable Quadrature Coupler With Wide Tuning Range of Center Frequency and Wide Operating Bandwidth." IEEE Transactions on Circuits and Systems II: Express Briefs 65, no. 7 (2018): 864–68. http://dx.doi.org/10.1109/tcsii.2017.2738662.

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2

Alsaif, H. "Highly Compact Design of Trimmed Patch with Modified Partial Ground Structure for Extreme-Wideband Systems." Engineering, Technology & Applied Science Research 7, no. 5 (2017): 1918–21. https://doi.org/10.5281/zenodo.1037164.

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In this paper, a novel highly compact microstrip monopole antenna with adjusted ground plane for ultra-wideband (UWB) applications is proposed. The patch antenna is composed of a trimmed radiator and rectangular ground plane with four slots providing relatively extreme wide operating frequency from 2.8 till 16.2 GHz based on -10 dB criteria. The high matching impedance in the design results in ultra-wide bandwidth that covers the entire BW allocated by FCC for UWB applications. At the same time, the presented antenna is distinguished by significantly miniaturized structure with total size of 1

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3

Arslan, Saad, Syed Asmat Ali Shah, and HyungWon Kim. "An Ultra-Wide Load Range Voltage Converter Using Proactive Phase Frequency Modulation for IoT Sensors." Sensors 20, no. 21 (2020): 6279. http://dx.doi.org/10.3390/s20216279.

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Modern sensor nodes have multiple operating states, which causes a conventional voltage converter to perform poorly over a wide load range of the operating states. This paper proposes a voltage converter whose switching frequency and output voltage are proactively adjusted to maintain high conversion efficiency. This allows the converter to exploit a wider frequency range to cover a wide load range. In addition, the proposed converter uses multiple smaller capacitor banks and employs multiphase operation to provide low output ripple voltage. A distributed topology for non-overlapping signal ge

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Liao, Yilong, and Xiangning Fan. "A Low-voltage Programmable Frequency Divider with Wide Input Frequency Range." ITM Web of Conferences 17 (2018): 01007. http://dx.doi.org/10.1051/itmconf/20181701007.

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A low-voltage programmable frequency divider with wide input frequency range is fabricated in standard 0.18µm TSMC RF CMOS technology and presented in this paper. Considering the frequency division ratio of dual-modulus prescaler is relatively smaller, a programmable divider with full custom design is used to increase the frequency division ratio and the maximum operating frequency. The frequency division ratio of the programmable frequency divider covers from 64 to 255. And the measured results show that the programmable divider works correctly when the input frequency varies from 0.5 GHz to

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5

Cárcamo, Alberto, Alejandro Fernandez-Hernandez, Fernando Gonzalez-Hernando, Aitor Vázquez, and Alberto Rodríguez. "Variable Switching Frequency for ZVS over Wide Voltage Range in Dual Active Bridge." Electronics 13, no. 10 (2024): 1800. http://dx.doi.org/10.3390/electronics13101800.

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The Dual Active Bridge (DAB) converter is known for its advantageous characteristics, including bidirectionality, galvanic isolation, and soft-switching operation. However, achieving Zero Voltage Switching (ZVS) across the complete operation range is not guaranteed, particularly through a wide input–output voltage ratio. This paper explores the integration of the switching frequency as a control variable in the DAB converter to ensure ZVS operation across a wide voltage range, employing Single Phase Shift (SPS) modulation. The study evaluated the RMS and reactive currents under variable switch

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6

Abdulhussein, Nabil, and Abdulkareem Abdullah. "Design of a Wide Dual-Band Coplanar Probe Feed Antenna for WLANs Applications." 3D SCEEER Conference sceeer, no. 3d (2020): 13–16. http://dx.doi.org/10.37917/ijeee.sceeer.3rd.2.

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This paper presents a new design to obtain wide dual-band operation from a coplanar probe feed antenna loaded with two shorted walls. The lower band of proposed antenna has a 10 dB bandwidth of 611 MHz (24.18%) around the center frequency 2527MHz, and the upper band has a bandwidth of 1255 MHz (27.88%) around the center frequency 4501MHz. The obtained bandwidths cover WLANs operations on all bands. The bandwidth of the first operating frequency covers ISM band (2400-2483.5) MHz, which is required by IEEE 802.11b, g and Bluetooth standards, and the bandwidth of the second operating frequency co

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7

Kaissoine, Abdou, and Bernard Huyart. "New three-phase demodulator circuit operating in a wide frequency range." Microwave and Optical Technology Letters 57, no. 8 (2015): 1825–31. http://dx.doi.org/10.1002/mop.29205.

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8

Awan, Wahaj Abbas, Syeda Iffat Naqvi, Wael Abd Ellatif Ali, et al. "Design and Realization of a Frequency Reconfigurable Antenna with Wide, Dual, and Single-Band Operations for Compact Sized Wireless Applications." Electronics 10, no. 11 (2021): 1321. http://dx.doi.org/10.3390/electronics10111321.

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This paper presents a compact and simple reconfigurable antenna with wide-band, dual-band, and single-band operating modes. Initially, a co-planar waveguide-fed triangular monopole antenna is obtained with a wide operational frequency band ranging from 4.0 GHz to 7.8 GHz. Then, two additional stubs are connected to the triangular monopole through two p-i-n diodes. By electrically switching these p-i-n diodes ON and OFF, different operating frequency bands can be attained. When turning ON only one diode, the antenna offers dual-band operations of 3.3–4.2 GHz and 5.8–7.2 GHz. Meanwhile, the ante

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9

Kalathy, Abirami, Arpan Laha, Majid Pahlevani, and Praveen Jain. "A Low Q Three-Phase Series Resonant Converter for PV Applications." Energies 16, no. 4 (2023): 1707. http://dx.doi.org/10.3390/en16041707.

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In this paper, a soft-switched three-phase resonant converter with a low quality factor (Q) design is proposed for Photovoltaic (PV) energy harvesting systems with a very wide range of operating conditions. Due to the low quality factor (Q ≤ 1), the voltage stress across the capacitors is drastically reduced. However, a major challenge of using a low Q design is the wide switching frequency range required for operation over a wide range of load and input conditions. In order to reduce the switching frequency range, this paper introduces a hybrid modulation technique employing asymmetric pulse

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10

Morton, P. A., V. Mizrahi, P. A. Andrekson, et al. "Mode-locked hybrid soliton pulse source with extremely wide operating frequency range." IEEE Photonics Technology Letters 5, no. 1 (1993): 28–31. http://dx.doi.org/10.1109/68.185050.

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11

Apollonov, V. V., V. V. Kijko, V. I. Kislov, A. G. Suzdal'tsev, and A. B. Egorov. "High-frequency repetitively pulsed operating regime in high-power wide-aperture lasers." Quantum Electronics 33, no. 9 (2003): 753–57. http://dx.doi.org/10.1070/qe2003v033n09abeh002496.

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12

Bezzam, Ignatius, Shoba Krishnan, C. Mathiazhagan, Tezaswi Raja, and Franco Maloberti. "Wide operating frequency resonant clock and data circuits for switching power reductions." Analog Integrated Circuits and Signal Processing 82, no. 1 (2014): 113–24. http://dx.doi.org/10.1007/s10470-014-0447-1.

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13

Kleiman, A. S., P. A. Kravchenko, L. F. Kuchin, and A. D. Cherenkov. "On the Development and Application of Extremely-High-Frequency Generators Operating in a Wide Frequency Range." Telecommunications and Radio Engineering 59, no. 10-12 (2003): 104–10. http://dx.doi.org/10.1615/telecomradeng.v59.i1012.130.

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14

Amin, H. Al Ka'bi, and M. Rady Magid. "A proposed model for frequency tuned antennas used in mobile communication systems." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 1367–74. https://doi.org/10.11591/ijece.v11i2.pp1367-1374.

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The antenna is considered as one of the most fundamental elements in wireless communication systems, especially in mobile devices. Desirable specifications of antennas include covering wide range of operating frequencies, while maintaining high quality of system performance over the whole range of operating frequencies. Therefore, the ability of tuning the resonant frequency of the antenna without altering its physical dimensions would be highly recommended in up-and-coming designs of antennas in mobile devices. This research work proposes a model for tuning the operating frequency of the inve

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15

Stosiak, Michał, Irina Yatskiv (Jackiva), Olegas Prentkovskis, and Mykola Karpenko. "Reduction of Pressure Pulsations over a Wide Frequency Range in Hydrostatic Systems." Machines 13, no. 1 (2025): 25. https://doi.org/10.3390/machines13010025.

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This article points out some of the forces acting on the components of a hydraulic system. These forces can lead to changes in the spectrum of pressure pulsations under certain conditions. These forces can originate from outside the hydraulic valve and can be the result of vibrations in the machine frame or the movement of the machine over uneven ground. In addition, an immanent feature of an operating hydraulic system is the pressure pulsation resulting from the pulsation of the output. This is caused by the kinematics of the pump’s displacement components and the impedance of the hydraulic s

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16

Hassani, Vahid, and Tegoeh Tjahjowidodo. "A Generalized Inertial-Dependent Prandtl-Ishlinskii Model for Wide-Band Frequency Piezoelectric Actuator." Advanced Materials Research 622-623 (December 2012): 1357–61. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.1357.

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Smart materials such as piezoceramics used in industrial applications, are subjected to nonlinear phenomenon of hysteresis which degrades the tracking performance of the actuator in operation. Depending on the operating frequency and input magnitude applied to the piezoelectric actuators (PA), the symmetric and asymmetric hysteresis loops can be observed. A generalized inertial-dependent Prandtl-Ishlinskii (PI) model is proposed in term of the stop operator to compensate the effects of nonlinearity in asymmetric hysteresis loops for PA. A nonlinear envelope function is assigned for the thresho

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17

Sosunov, A. M., A. G. Altynnikov, T. K. Legkova, R. A. Platonov, and A. E. Komlev. "Fabry–Perot Antenna Based on an Electrically Tunable Slot Antenna and a Two-Layer Frequency-Selective Surface." Journal of the Russian Universities. Radioelectronics 26, no. 6 (2023): 16–26. http://dx.doi.org/10.32603/1993-8985-2023-26-6-16-26.

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Introduction. One of the directions in Fabry–Perot antenna design consists in increasing its operation frequency range. In the present work, we set out to develop a Fabry–Perot antenna with a smooth gain pattern across a wide frequency range. To that end, a tunable slot antenna based on a thin-film ferroelectric varactor was used. The major development criterion was a high uniformity of the gain pattern, not exceeding 1 dB in the given frequency band. Aim. To develop a Fabry–Perot antenna for the 4.9–5.5 GHz frequency range with a high gain uniformity within the operating frequency band.Materi

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18

Lee, Woochan, and Dukju Ahn. "Wireless Power Transfer under Wide Distance Variation Using Dual Impedance Frequency." Electronics 9, no. 1 (2020): 110. http://dx.doi.org/10.3390/electronics9010110.

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A dual-impedance operation, where coil impedance is controlled by operating frequency selection, is proposed to maintain optimum reflected impedance across coupling variation. More specifically, this work focuses on how high coupling between coils presents excessively high reflected resistance to transmitter (Tx) inverters, degrading the efficiency and output power of the inverter. To overcome this problem, the proposed system is equipped with dual-impedance coil and selects high- or low-impedance coil based on the ability to operate both at 200 kHz and 6.78 MHz frequencies. The reactive imped

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19

Jiang, Ming, Li Zhong Song, Xin Tong, and Liang Fang. "Experimental Research on an Antipodal Vivaldi Antenna with Wide Band." Advanced Materials Research 631-632 (January 2013): 1022–25. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.1022.

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The Vivaldi antenna is a kind of wide band antenna, which is widely used in many wide band electronic systems. This paper designed and fabricated a specific antipodal Vivaldi antenna (AVA) for practical application. The operating frequency range of fabricated AVA is from 2 GHz to 11GHz. The length and width of the fabricated AVA are 92.7millimeter and 110.4millimeter, respectively. A practical AVA was fabricated according to simulation parameters. The experimental results of the AVA are provided and analyzed. For the fabricated AVA, the measured average voltage standing wave ratio (VSWR) is 2

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20

Inam, Wardah, Khurram K. Afridi, and David J. Perreault. "Variable Frequency Multiplier Technique for High-Efficiency Conversion Over a Wide Operating Range." IEEE Journal of Emerging and Selected Topics in Power Electronics 4, no. 2 (2016): 335–43. http://dx.doi.org/10.1109/jestpe.2015.2461615.

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21

Zhang, Xiangpeng, Qiang Sun, Jiyao Yang, Jiming Cao, and Wangzhe Li. "Reconfigurable multi-band microwave photonic radar transmitter with a wide operating frequency range." Optics Express 27, no. 24 (2019): 34519. http://dx.doi.org/10.1364/oe.27.034519.

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22

Kim, Hyun Ji, and Sung Hoon Kim. "Comparative Investigation into the Electromagnetic Wave Shielding Effectiveness of Different Type Carbon-Based Fabrics." Key Engineering Materials 803 (May 2019): 81–87. http://dx.doi.org/10.4028/www.scientific.net/kem.803.81.

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Different type carbon-based fabrics, namely woven or nonwoven fabric, were employed to investigate the electromagnetic wave shielding effectiveness of the fabrics in the wide operating frequency range, namely 0.4GHz to 40GHz. The surface and cross sectional morphologies of the fabrics, their electrical conductivities, and their electromagnetic wave shielding effectiveness were investigated. In the case of woven fabric, the value of the electrical conductivity was much different according to the measuring direction in the woven fabric. For the nonwoven fabric, however, this value was independen

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23

Krylov, D. S., and O. I. Kholod. "Active rectifier with a fixed modulation frequency and a vector control system in the mode of bidirectional energy flow." Electrical Engineering & Electromechanics, no. 6 (October 21, 2023): 48–53. http://dx.doi.org/10.20998/2074-272x.2023.6.08.

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Goal. Creation of a vector control system with improved characteristics for an active rectifier-voltage source operating in the bidirectional energy flow mode with a with a fixed modulation frequency. Methodology. The physical prerequisites for the active rectifier - voltage source operation in the system of a medium-power frequency electric drive are considered. A vector control system with a fixed modulation frequency is constructed, the principles of forming the signals acting in it and the influence on its operation of the converter power circuit parameters and the power consumed by it are

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24

Arazi, Mouncif, Alireza Payman, Mamadou Baïlo Camara, and Brayima Dakyo. "Bidirectional Interface Resonant Converter for Wide Voltage Range Storage Applications." Sustainability 14, no. 1 (2021): 377. http://dx.doi.org/10.3390/su14010377.

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In this paper, a bidirectional zero voltage switching (ZVS) resonant converter with narrow control frequency deviation is proposed. Wide input–output voltage range applications, such as flywheel or supercapacitors storage units are targeted. Due to symmetrical topology of resonant circuit interfaces, the proposed converter has similar behavior in bidirectional operating mode. We call it Dual Active Bridge Converter (DABC). The proposal topology of the converter is subjected to multi resonant circuits which make it necessary to study with multiscale approaches. Thus, first harmonic approximatio

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25

Golovkov, Alexander A., Polina V. Terenteva, Alexander G. Zhuravlev, Michail S. Shmyrin, and Nikolay S. Stenyukov. "BROADBAND MICROWAVE VIVALDI ANTENNA USING COPLANAR FEED LINE." Journal of the Russian Universities. Radioelectronics, no. 6 (January 18, 2019): 13–19. http://dx.doi.org/10.32603/1993-8985-2018-21-6-13-19.

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Nowadays Vivaldi antennas are used as directional emitters with matching and balancing device at the input. As a rule, these devices cause additional losses in case of broadband operation. Besides, the use of the device leads to radiator pattern distortions, especially when operating in a wide frequency range. Stringent operating requirements (wide operating temperature, high humidity, salt fog, vibration, etc.), make the choice of proper chip very complicated. The aim of the study is to develop a slot antenna with a 50-ohm port at the input, which would be easy to manufacture and operate, whi

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26

Al Ka'bi, Amin H., and Magid M. Rady. "A proposed model for frequency tuned antennas used in mobile communication systems." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (2021): 1367. http://dx.doi.org/10.11591/ijece.v11i2.pp1367-1374.

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The antenna is considered as one of the most fundamental elements in wireless communication systems, especially in mobile devices. Desirable specifications of antennas include covering wide range of operating frequencies, while maintaining high quality of system performance over the whole range of operating frequencies. Therefore, the ability of tuning the resonant frequency of the antenna without altering its physical dimensions would be highly recommended in up-and-coming designs of antennas in mobile devices. This research work proposes a model for tuning the operating frequency of the inve

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27

I., H. Idris, R. Hamid M., Kamardin K., and K. A. Rahim M. "Wide to multiband elliptical monopole reconfigurable antenna for multimode systems applications." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 4 (2019): 1663–69. https://doi.org/10.12928/TELKOMNIKA.v17i4.12764.

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Wideband-multiband reconfigurable elliptical monopole antenna is investigated in this paper. By having conventional elliptical monopole antenna, wideband operating frequency is obtained. With the combination of dual pairs of slotted arms and a band-pass filter on the ground plane of the elliptical monopole, multiband is achieved. Dual-band operating frequencies at 1.6 GHz and 2.6 GHz while wideband operates from 3.35 GHz to 9 GHz. Therefore, wide range of wireless communication systems is obtained from the proposed antenna to support the multiband mode (i.e. GPS and LTE) and UWB systems. Frequ

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28

Zhang, Yu Fa, and Da Bin Yu. "Investigation of Microstrip Antenna Operating Frequency Based on its Parameters." Applied Mechanics and Materials 182-183 (June 2012): 535–40. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.535.

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Microstrip antenna exhibits unique properties that have led to wide range of application. The frequency is the most important factor in antenna engineering. However, antenna resonant frequency is determined by various factors. This paper focuses on some of these parameters, and studies have also been performed to obtain design guidelines for patch antenna. Parameters involved vary from -40% to +40% compare to the selected dimensions as a criterion, and the frequency shifts have been obtained, Comparatively, the patch length plays the most important rule on antenna frequency. The feed point loc

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29

Lu, Tan, Libo Ding, Keren Dai, Shaojie Ma, and He Zhang. "A High-Efficiency Wireless Information and Energy Co-Transmission System Based on Self-Compensating Inductive Temperature Sensitivity Error." Sensors 25, no. 8 (2025): 2459. https://doi.org/10.3390/s25082459.

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To address the stability issues of energy and information transmission in wireless power and information transfer system operating over a wide temperature range, this paper establishes a mathematical model of the resonant frequency of an electromagnetic coupling system under varying temperature conditions. Simulations and experiments are conducted to analyze the impact of temperature on resonance characteristics. The results show that within the temperature range of −40 °C to 50 °C, frequency deviation leads to a reduction in the power deviation coefficient to 35.93%. To mitigate this issue, a

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30

Tang, Gang, Fang Cheng, Xin Hu, et al. "A Two-Degree-of-Freedom Cantilever-Based Vibration Triboelectric Nanogenerator for Low-Frequency and Broadband Operation." Electronics 8, no. 12 (2019): 1526. http://dx.doi.org/10.3390/electronics8121526.

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With the continual increasing application requirements of broadband vibration energy harvesters (VEHs), many attempts have been made to broaden the bandwidth. As compared to adopted only a single approach, integration of multi-approaches can further widen the operating bandwidth. Here, a novel two-degree-of-freedom cantilever-based vibration triboelectric nanogenerator is proposed to obtain high operating bandwidth by integrating multimodal harvesting technique and inherent nonlinearity broadening behavior due to vibration contact between triboelectric surfaces. A wide operating bandwidth of 3

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31

Yang, Tianyue, Yuanfei Zhu, Zhiwei Fang, Haoyu Wu, Wanlu Jiang, and Ming Yang. "A Driving and Control Scheme of High Power Piezoelectric Systems over a Wide Operating Range." Sensors 20, no. 16 (2020): 4401. http://dx.doi.org/10.3390/s20164401.

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Significant variation in impedance under a wide range of loads increases the difficulty of frequency tracking and vibration control in high-power piezoelectric systems (HPPSs). This paper proposed a wide operating range driving and control scheme for HPPSs. We systematically analyzed the impedance characteristics and deduced the load optimization frequency. In order to provide sufficient drive capability, the inverter combined with an LC matching circuit is configured. With the aid of a transformer ratio arm bridge (TRAB) combined with a proposed pulse-based phase detector (PBPD), the proposed

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32

IBARRA BASABE, EDORTA, VICTOR REPECHO DEL CORRAL, DOMINGO BIEL SOLE, ANDRES SIERRA GONZALEZ, IÑIGO KORTABARRIA, and ANTONI ARIAS PUJOL. "CONTROL OF ELECTRIC DRIVES WITH HIGH SWITCHING FREQUENCY OPERATION CAPABILITIES: ENVISIONING FUTURE PROSPECTS." DYNA 99, no. 2 (2024): 119–21. http://dx.doi.org/10.6036/10974.

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Industrial drives are currently of great relevance considering the technological challenges associated with climate change mitigation. Current technologies use silicon devices with switching frequencies around 10 kHz. However, new wide bandgap (WBG) devices are expected to replace these technologies and allow operation at switching frequencies of 100 kHz or higher. This may have implications for how control algorithms for electrical drives are implemented. In this perspective paper the authors analyse and discuss the implications of high frequency operation on control, and predict the possible

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33

Haist, Blake, and Richard E. Wirz. "Network Analysis as a Method for Identifying Operational Modes of Cold Atmospheric Plasma Jets." Plasma 8, no. 1 (2025): 10. https://doi.org/10.3390/plasma8010010.

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Network analysis is a convenient method for analyzing cold atmospheric plasma (CAP) devices across a wide range of operating conditions. By using frequency and voltage as nodes in the network, edges are formed between nodes when the combination of voltage and frequency results in an ignited plasma jet. Singular value decomposition is used to identify modalities in the network that are representative of operational modes in the plasma jet. An analysis of the spectra produced by the jet provides validation of the operational modes and shows that voltage and frequency predominately affect the ope

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Cao, Dongxing, Wei Xia, and Wenhua Hu. "Low-frequency and broadband vibration energy harvester driven by mechanical impact based on layer-separated piezoelectric beam." Applied Mathematics and Mechanics 40, no. 12 (2019): 1777–90. http://dx.doi.org/10.1007/s10483-019-2542-5.

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AbstractVibration energy harvesting is to transform the ambient mechanical energy to electricity. How to reduce the resonance frequency and improve the conversion efficiency is very important. In this paper, a layer-separated piezoelectric cantilever beam is proposed for the vibration energy harvester (VEH) for low-frequency and wide-bandwidth operation, which can transform the mechanical impact energy to electric energy. First, the electromechanical coupling equation is obtained by the Euler-Bernoulli beam theory. Based on the average method, the approximate analytical solution is derived and

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35

Qian, Jingui, Wei Huang, Renhua Yang, Raymond H. W. Lam, and Joshua E. Y. Lee. "Low-cost laser-cut patterned chips for acoustic concentration of micro- to nanoparticles and cells by operating over a wide frequency range." Analyst 146, no. 10 (2021): 3280–88. http://dx.doi.org/10.1039/d1an00197c.

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36

Chen, Hao, and Erwin H. W. Chan. "Photonics-Based RF Signal Phase Detector With Wide Operating Frequency Range and High Resolution." IEEE Photonics Journal 13, no. 2 (2021): 1–9. http://dx.doi.org/10.1109/jphot.2021.3066992.

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Park, Chee-Sung, Cheol-Woo Ahn, Su-Chul Yang, and Shashank Priya. "Dimensionally gradient magnetoelectric bimorph structure exhibiting wide frequency and magnetic dc bias operating range." Journal of Applied Physics 106, no. 11 (2009): 114101. http://dx.doi.org/10.1063/1.3253739.

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38

Bhatnagar, V. P., and J. Jacquinot. "An ICRF antenna for the next step tokamak operating in a wide frequency band." Nuclear Fusion 34, no. 6 (1994): 886–95. http://dx.doi.org/10.1088/0029-5515/34/6/i12.

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Kim, Hyun, and Heung-Sik Tae. "Effects of Operating Frequency on Luminance Characteristics of Wide-Gap AC Plasma Display Panel." IEEE Transactions on Plasma Science 36, no. 3 (2008): 809–15. http://dx.doi.org/10.1109/tps.2008.922497.

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40

CHOI, S. H., Y. T. CHOI, S. B. CHOI, and C. C. CHEONG. "PERFORMANCE ANALYSIS OF AN ENGINE MOUNT FEATURING ER FLUIDS AND PIEZOACTUATORS." International Journal of Modern Physics B 10, no. 23n24 (1996): 3143–57. http://dx.doi.org/10.1142/s0217979296001586.

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Conventional rubber mounts and various types of passive or semi-active hydraulic engine mounts for a passenger vehicle have their own functional aims on the limited frequency band in the broad engine operating frequency range. In order to achieve high system performance over all frequency ranges of the engine operation, a new type of engine mount featuring electro-rheological(ER) fluids and piezoactuators is proposed in this study. A mathematical model of the proposed engine mount is derived using the bond graph method which is inherently adequate to model the interconnected hydromechanical sy

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Wu, Feng, Dejun Liu, Xiaohu Wu, Hongju Li, and Shuyuan Xiao. "Frequency-tunable wide-angle polarization selection with a graphene-based anisotropic epsilon-near-zero metamaterial." Journal of Optics 24, no. 2 (2022): 024004. http://dx.doi.org/10.1088/2040-8986/ac45d0.

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Abstract In this paper, we achieve frequency-tunable wide-angle polarization selection based on an anisotropic epsilon-near-zero (AENZ) metamaterial mimicked by a subwavelength graphene/SiO2 multilayer. The physical mechanism of wide-angle polarization selection can be explained by the analysis of the iso-frequency curve (IFC). Under transverse electric polarization, only the incident lights which are close to normal incidence can transmit through the designed multilayer since the IFC of the AENZ metamaterial is an extremely small circle. However, under transverse magnetic polarization, all th

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Arkhipenkov, D. V., I. I. Zabenkov, and S. S. Salanovich. "Methods of structural and functional implementation of ultra-wide range receiving paths." Doklady BGUIR 18, no. 7 (2020): 23–30. http://dx.doi.org/10.35596/1729-7648-2020-18-7-23-30.

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Currently, radio monitoring systems are being actively improved in the direction of expanding the range of operating frequencies and the width of the spectrum of processed signals, which in some cases requires changing approaches to the design of their receiving devices. The purpose of the article is to substantiate the methods and circuit design options for implementing a receiver of an ultra-wide-range radio monitoring system and to justify the sequence of selecting the element base and calculating the parameters of the receiving path. The research proves expedient to choose the infradine st

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Lee, Wen-Yu, Hsin-Piao Lin, and Ding-Bing Lin. "Low-Reflection Cross Section and High-Isolation 2x2 Broadband Antenna Array for the MIMO Measurement System." MATEC Web of Conferences 232 (2018): 04054. http://dx.doi.org/10.1051/matecconf/201823204054.

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The author of this paper explored Vivaldi [1] [2] line theory and technology and used it as a basis to propose a Vivaldi antenna array to replace a single Vivaldi antenna. This was to achieve a dual-polarized antenna with high directivity and high isolation in the MIMO anechoic chamber, and one that is minimally affected by the environment. The operating frequency of this antenna array covers a frequency range of 0.7–6.0 GHz and is composed of four Vivaldi units with relatively high isolation between them to reduce measurement errors caused by coupling. In each unit, two identical Vivaldi ante

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Chen, Wei, Shaozhen Li, Wenbo Sun, Kai Bi, Zhichen Lin, and Guozheng Zhang. "Wide Frequency PWM Rectifier Control System Based on Improved Deadbeat Direct Power Control." World Electric Vehicle Journal 13, no. 12 (2022): 230. http://dx.doi.org/10.3390/wevj13120230.

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The precision of deadbeat direct power control depends on the parameters of the system model. In wide frequency applications, such as multi- electric aircraft and electric vehicles, variations in frequency and resistive parameters will affect the control effect. The AC side voltage frequency of the generator rectifier varies widely, which will lead to a steady-state reactive power error in the deadbeat direct power control. In addition, the large temperature variation range during the operation of the multi-electric aircraft and electric vehicles leads to large changes in the filter inductance

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He, Qingqing, Shun Tang, Dan Ren, et al. "A Novel Wide-Gain-Range Variable-Structure DC/DC Converter Based on an LLC Resonant Converter." Energies 18, no. 14 (2025): 3664. https://doi.org/10.3390/en18143664.

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The LLC resonant converter, as an isolated DC-DC conversion topology, has been widely adopted in industrial applications. However, when operating under wide input/output voltage ranges, a broad switching frequency range is required to achieve the desired voltage gain. This wide frequency variation complicates the design of magnetic components, causes loss of soft-switching characteristics, and deteriorates electromagnetic interference (EMI) performance. To address these challenges, this paper presents a detailed analysis of the L-LCLC resonant converter. By controlling the connection/disconnec

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Liu, Baoguo, Xiang Ren, Tao Xue, and Qiang Zou. "A Slanted-Finger Interdigitated Transducer Microfluidic Device for Particles Sorting." Micromachines 16, no. 4 (2025): 483. https://doi.org/10.3390/mi16040483.

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Sorting particles or cells of specific sizes in complex systems has long been a focus of many researchers. Acoustic surface waves, which generate acoustic radiation forces on particles or cells and, thus, influence their motion, are commonly used for the non-destructive separation of particles or cells of specific sizes. In previous studies, the frequency of acoustic surface wave generation has been limited by the interdigitated transducer (IDT). To extend the effective operating frequency range of the IDT, a slanted-finger interdigitated transducer (SFIT) with a wide acoustic path and multipl

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Jia, Yong, Bangwei Tan, Wentao Zhang, Dongrong Jiang, Chao Yang, and Yunhao Wen. "A Novel Control Strategy for Hydraulic Turbines to Consider Both Primary Frequency Regulation and Ultra-Low Frequency Oscillation Suppression." Energies 17, no. 5 (2024): 1067. http://dx.doi.org/10.3390/en17051067.

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In response to the requirements of mitigating ultra-low frequency oscillation (ULFO) and enhancing primary frequency regulation (PFR) performance in hydropower-dominated systems, a novel control strategy, namely the center-frequency-structured governor-side power system stabilizer (CFS_GPSS) is proposed. In this study, the transfer function model of the hydropower system with a proportional-integral-derivative (PID)-type governor is established. Through analysis of damping torque and amplitude-frequency characteristics, the dominant links and key characteristics of ULFO are revealed. Based on

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Song, Li Zhong, Huan Feng Hong, and Jing Hong Xue. "Design and Performance Simulation of Two Kinds of Antipodal Vivaldi Antennas for Wide Band Radar Systems." Applied Mechanics and Materials 170-173 (May 2012): 2893–98. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2893.

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The Vivaldi antennas are widely used in many wide band electronic systems for its good performances. This paper designed and simulated two kinds of Vivaldi antennas for wide band passive radar applications, which are the antipodal Vivaldi antenna fed by strip line and antipodal Vivaldi antenna fed by microstrip line. The specific design parameters and the radiation performances of each kind of vivaldi antenna are provided over the operating frequency range of 3GHz to 11GHz. Furthermore a circular antenna array with six Vivaldi antenna elements fed by microstrip lines was also simulated to obta

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Vu Minh Thanh, Luong Van Trinh, Thọ Lưu, and Phung Ngoc Son. "A design of Archimedean spiral antennas applied in passive radar." Journal of Military Science and Technology 101 (February 21, 2025): 32–38. https://doi.org/10.54939/1859-1043.j.mst.101.2025.32-38.

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Currently, spiral antennas are widely studied and applied for both military and civilian purposes. However, ensuring that the antenna system operates effectively across a wide frequency range while still meeting gain and directionality requirements is a complex problem. In this article, the authors present the results of research and design of spiral antennas operating in the 2 to 4 GHz frequency range (S band). The analysis of operating principles, calculations, and simulations using CST 2019 software demonstrates that the antenna system operates over a broad frequency range, meeting the requ

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Izadkhast, Seyedmahdi, Rafael Cossent, Pablo Frías, Pablo García-González, and Andrea Rodríguez-Calvo. "Performance Evaluation of a BESS Unit for Black Start and Seamless Islanding Operation." Energies 15, no. 5 (2022): 1736. http://dx.doi.org/10.3390/en15051736.

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The main purpose of this paper is to evaluate the overall performance of a battery energy storage system (BESS) during (I) grid-connected, (II) black start, and (III) islanded operating modes. To do so, firstly, a novel three-mode controller is proposed and developed. The proportional–integral–derivative (PID) controller is implemented, including the following three components: (1) inertia emulation, (2) frequency-active power and voltage-reactive power droops, and (3) secondary frequency and voltage controllers. Secondly, to effectively evaluate the proposed controller performance under vario

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