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Journal articles on the topic 'Tunable bandpass filter'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Deng, Zhong Liang, and Xing Jie Cao. "Design and Simulation of K Band RF MEMS Tunable Combline Filter." Advanced Materials Research 875-877 (February 2014): 2219–23. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.2219.

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Tunable bandpass filters are generally preferred and are used extensively in the mobile communication systems. In this paper, a design of the RF MEMS tunable combline bandpass filter is proposed. Firstly, the theory of the RF MEMS tunable combline bandpass filter is presented. Secondly, a combline bandpass filter which have a tunable frequency range from 18GHz to 27GHz is designed and simulated by using the EDA simulation software. Its bandwidth is about 1GHz in the tunable frequency range. From the simulation results, the designed filter is not only compact and effortless to fabricate but als

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2

Zhang, Zhonghai, Fei Zhao, and Aiting Wu. "A tunable open ring coupling structure and its application in fully tunable bandpass filter." International Journal of Microwave and Wireless Technologies 11, no. 08 (2019): 782–86. http://dx.doi.org/10.1017/s1759078719000485.

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AbstractThis letter presents a novel tunable coupling structure to simplify the design complexity of the miniaturized fully tunable filter by using open ring and varactors. Based on the proposed novel tunable coupling structure, a fully tunable bandpass filter is implemented with independently tunable operating frequency and bandwidth. The tunable resonator and tunable coupling structure can be easily combined to improve Out-of-band suppression performance. The design procedure of a fully tunable bandpass filter consists of five tunable cavities and tunable coupling rings is also proposed. A p

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3

Chandler, S. R., I. C. Hunter, and J. G. Gardiner. "Active varactor tunable bandpass filter." IEEE Microwave and Guided Wave Letters 3, no. 3 (1993): 70–71. http://dx.doi.org/10.1109/75.205668.

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4

Chen, S. W., J. W. Wu, J. D. Wu, and J. S. Li. "Tunable active bandpass filter design." Electronics Letters 47, no. 18 (2011): 1019. http://dx.doi.org/10.1049/el.2011.1401.

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5

Pan, Wei-Qiang, Xiao-Lan Zhao, Yao Zhang, and Jin-Xu Xu. "High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband." International Journal of Antennas and Propagation 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/762504.

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This paper presents a novel method to design dual-band bandpass filters with tunable lower passband and fixed upper passband. It utilizes a trimode resonator with three controllable resonant modes. Discriminating coupling is used to suppress the unwanted mode to avoid the interference. Varactors are utilized to realize tunable responses. The bandwidth of the two bands can be controlled individually. Transmission zeros are generated near the passband edges, resulting in high selectivity. For demonstration, a tunable bandpass filter is implemented. Good agreement between the prediction and measu

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6

Rhoads, Jeffrey F., Steven W. Shaw, Kimberly L. Turner, and Rajashree Baskaran. "Tunable Microelectromechanical Filters that Exploit Parametric Resonance." Journal of Vibration and Acoustics 127, no. 5 (2005): 423–30. http://dx.doi.org/10.1115/1.2013301.

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Background: This paper describes an analytical study of a bandpass filter that is based on the dynamic response of electrostatically-driven MEMS oscillators. Method of Approach: Unlike most mechanical and electrical filters that rely on direct linear resonance for filtering, the MEM filter presented in this work employs parametric resonance. Results: While the use of parametric resonance improves some filtering characteristics, the introduction of parametric instabilities into the system does present some complications with regard to filtering. Conclusions: The aforementioned complications can

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7

Ramadan, A. H., J. Costantine, Y. Tawk, C. G. Christodoulou, and K. Y. Kabalan. "Frequency-Tunable and Pattern Diversity Antennas for Cognitive Radio Applications." International Journal of Antennas and Propagation 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/638627.

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Frequency-tunable microstrip antennas, for cognitive radio applications, are proposed herein. The approach is based on tuning the operating frequency of a bandpass filter that is incorporated into a wideband antenna. The integration of an open loop resonator- (OLR-) based adjustable bandpass filter into a wideband antenna to transform it into a tunable filter-antenna is presented. The same technique is employed to design a cognitive radio pattern diversity tunable filter-antenna. A good agreement between the simulated and measured results for the fabricated prototypes is obtained. The radiatio

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8

Feng, Sujuan, Yan-Lin Liao, and Yan Zhao. "Graphene-based tunable bandpass guided-mode resonance mid-infrared filter." Modern Physics Letters B 33, no. 30 (2019): 1950360. http://dx.doi.org/10.1142/s0217984919503603.

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We report a tunable bandpass mid-infrared filter with microstructure and graphene, and the transmission peaks can be tuned from [Formula: see text] to [Formula: see text] when the graphene’s Fermi level increases from 0.2 eV to 1.0 eV. This bandpass mid-infrared filter is originated from the guided-mode resonance (GMR) effect, and the tunable mechanism is mainly attributed to the change of the refractive index of the graphene. This tunable mid-infrared filter can be applied in non-dispersive infrared analyzer.

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9

Petermann, I., S. Helmfrid, O. Gunnarsson, and L. Kjellberg. "Tunable and programmable optical bandpass filter." Journal of Optics A: Pure and Applied Optics 9, no. 11 (2007): 1057–61. http://dx.doi.org/10.1088/1464-4258/9/11/015.

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10

Antonio-Lopez, J. E., A. Castillo-Guzman, D. A. May-Arrioja, R. Selvas-Aguilar, and P. LiKamWa. "Tunable multimode-interference bandpass fiber filter." Optics Letters 35, no. 3 (2010): 324. http://dx.doi.org/10.1364/ol.35.000324.

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11

Hafiz, Md Abdullah Al, Lakshmoji Kosuru, Amal Z. Hajjaj, and Mohammad I. Younis. "Highly Tunable Narrow Bandpass MEMS Filter." IEEE Transactions on Electron Devices 64, no. 8 (2017): 3392–98. http://dx.doi.org/10.1109/ted.2017.2716949.

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12

Hueber, Dennis M., Christopher L. Stevenson, and Tuan Vo-Dinh. "Fast Scanning Synchronous Luminescence Spectrometer Based on Acousto-Optic Tunable Filters." Applied Spectroscopy 49, no. 11 (1995): 1624–31. http://dx.doi.org/10.1366/0003702953965830.

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A new luminescence spectrometer based on quartz-collinear acousto-optic tunable filters (AOTFs) and capable of synchronous scanning is described. An acousto-optic tunable filter is an electronically tunable optical bandpass filter. Unlike a tunable grating monochromator, an AOTF has no moving mechanical parts, and an AOTF can be tuned to any wavelength within its operating range in microseconds. These characteristics, combined with the small size of these devices, make AOTFs an important new alternative to conventional monochromators, especially for portable instrumentation. The relevant perfo

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13

Xu, Jin, and Yan Zhu. "Tunable Bandpass Filter Using a Switched Tunable Diplexer Technique." IEEE Transactions on Industrial Electronics 64, no. 4 (2017): 3118–26. http://dx.doi.org/10.1109/tie.2016.2638402.

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14

Wu, Xin Hui, Jing Li, Chang Hai Qin, and Zhong Hai Zhang. "Bandwidth Balancing Design of Miniaturized Tunable Coaxial Cavity Filter." Applied Mechanics and Materials 40-41 (November 2010): 453–56. http://dx.doi.org/10.4028/www.scientific.net/amm.40-41.453.

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This paper proposes a method of the coupling modal, which is able to miniaturize the tunable cavity filter while keeping its bandwidth balancing. The filter consists of a tunable cavity dual-bandpass filter and a triangular twin-loop as its inter-cavities coupling structure. We analyzed and calculated the bandwidth of the filter changing with the size and position of the triangular twin-loop. To prove the advancement of the design, a tunable coaxial cavity dual-bandpass filter operating at 230MHz and 409MHz was fabricated and measured. The size is less then a half that of the conventional tuna

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15

Alahyari, Amin, Massoud Dousti, and Mohammad Bagher Tavakoli. "An Integrated Two-Mode Tunable Channelized Low-Noise Active Filter." Journal of Circuits, Systems and Computers 27, no. 06 (2018): 1850090. http://dx.doi.org/10.1142/s0218126618500901.

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In this paper, a new structure for an integrated channelized active filter is proposed. This filter can be used as a channelized bandpass filter and again as a channelized band-stop filter. This is fulfilled by using one biasing voltage. In designing a three-channel bandpass filter, a recursive differential structure is used. Moreover, by subtracting bandpass filter output from an all-pass output, the proposed three-channel band-stop filter is achieved. A wideband amplifier plays the role of an all-pass filter. In addition, to decrease the noise of this filter, a noise-canceling circuit is ado

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16

Wang, Z. P., P. S. Hall, J. Kelly, and P. Gardner. "Microstrip Tunable Bandpass Filter with the Colinear Resonators." International Journal of Antennas and Propagation 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/960138.

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This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode. The colinear resonant sections, in this filter, are not configured in parallel, as they are in a conventional combline filter. For this reason the overall area of the filter is reduced. The passband of the filter can be tuned from 0.69 GHz to 1.20 GHz by varying the capacitance of the varactor diode. The insertion loss of this filter changes from 1.2 dB to 2.1 dB across this bandwidth.

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17

Erokhin, V. V., K. V. Murasov, S. A. Zavyalov, and A. V. Kosykh. "TERMAL TEST OF ACTIVE TUNABLE BANDPASS FILTER." Dynamics of Systems, Mechanisms and Machines 7, no. 2 (2019): 196–203. http://dx.doi.org/10.25206/2310-9793-7-2-196-203.

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18

Yerokhin, V. V., K. V. Murasov, and S. A. Zavyalov. "Active tunable bandpass filter in integral design." YOUNG RUSSIA: HIGH TECHNOLOGY – INTO INDUSTRY, no. 1 (2019): 120–26. http://dx.doi.org/10.25206/2310-4597-2019-1-120-126.

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19

Karim, Muhammad Faeyz, and Mohammed Yakoob Siyal. "A COMPACT SWITCHABLE AND TUNABLE BANDPASS FILTER." Progress In Electromagnetics Research M 85 (2019): 71–81. http://dx.doi.org/10.2528/pierm19071804.

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20

Alam, A. H. M. Zahirul. "TUNABLE BANDPASS FILTER USING RF MEMS SWITCHES." IIUM Engineering Journal 10, no. 2 (2010): 69–80. http://dx.doi.org/10.31436/iiumej.v10i2.6.

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A band pass tunable RF filter is proposed by using Radio Frequency (RF) Microelectro Mechanical Systems (MEMS). The tunability is obtained by using capacitive MEMS switches that can be tuned within the bandwidth of 3.6 GHz to 4.4 GHz. The performance of the filter depends on geometry and location and types of the MEMS switches. Optimization has been done to achieve tunability by using 3-D high frequency electromagnetic simulator (HFSS).

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21

Chan, E. H. W. "Novel Continuously Tunable Microwave Photonic Bandpass Filter." IEEE Photonics Technology Letters 20, no. 5 (2008): 357–59. http://dx.doi.org/10.1109/lpt.2008.916898.

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22

Liu, B., F. Wei, H. Zhang, X. Shi, and H. Lin. "A Tunable Bandpass Filter with Switchable Bandwidth." Journal of Electromagnetic Waves and Applications 25, no. 2-3 (2011): 223–32. http://dx.doi.org/10.1163/156939311794362704.

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23

Chi, Pei-Ling, Tao Yang, and Tsung-Ying Tsai. "A Fully Tunable Two-Pole Bandpass Filter." IEEE Microwave and Wireless Components Letters 25, no. 5 (2015): 292–94. http://dx.doi.org/10.1109/lmwc.2015.2409794.

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24

Floriot, Johan, Fabien Lemarchand, and Michel Lequime. "Tunable double-cavity solid-spaced bandpass filter." Optics Express 12, no. 25 (2004): 6289. http://dx.doi.org/10.1364/opex.12.006289.

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25

Jeong, Seong-Wook, Tae-Hak Lee, and Juseop Lee. "Frequency- and Bandwidth-Tunable Absorptive Bandpass Filter." IEEE Transactions on Microwave Theory and Techniques 67, no. 6 (2019): 2172–80. http://dx.doi.org/10.1109/tmtt.2019.2914111.

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26

Xiao, Jian-Kang. "TRIANGULAR RESONATOR BANDPASS FILTER WITH TUNABLE OPERATION." Progress In Electromagnetics Research Letters 2 (2008): 167–76. http://dx.doi.org/10.2528/pierl08010606.

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27

McCallion, K., W. Johnstone, and G. Fawcett. "Tunable in-line fiber-optic bandpass filter." Optics Letters 19, no. 8 (1994): 542. http://dx.doi.org/10.1364/ol.19.000542.

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28

Lee, Jongwon, and Mikhail A. Belkin. "Widely tunable thermo-optic plasmonic bandpass filter." Applied Physics Letters 103, no. 18 (2013): 181115. http://dx.doi.org/10.1063/1.4828500.

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29

Jung, Dongjin, J. N. Hansen, and Kai Chang. "Piezoelectric transducer-controlled tunable hairpin bandpass filter." Electronics Letters 48, no. 8 (2012): 440. http://dx.doi.org/10.1049/el.2012.0182.

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30

Yang, X., J. Wu, X. Xing, et al. "Compact tunable bandpass filter on YIG substrate." Electronics Letters 48, no. 17 (2012): 1070–71. http://dx.doi.org/10.1049/el.2012.1001.

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31

Lin, Jenshan, Chi-Yang Chang, Yukio Yamamoto, and Tatsuo Itoh. "Progress of a tunable active bandpass filter." Annales Des Télécommunications 47, no. 11-12 (1992): 499–507. http://dx.doi.org/10.1007/bf02998312.

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32

Motoi, Keiichi, Naoki Oshima, Masaki Kitsunezuka, and Kazuaki Kunihiro. "A 0.4–3-GHz nested bandpass filter and a 1.1–1.7-GHz balun bandpass filter using tunable band-switching technique." International Journal of Microwave and Wireless Technologies 9, no. 6 (2017): 1279–91. http://dx.doi.org/10.1017/s1759078717000447.

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This paper presents a second-order tunable single-ended (unbalanced) bandpass filter (BPF) with continuous 0.4–3-GHz coverage and a tunable balun BPF with continuous 1.1–1.7-GHz coverage for software-defined radio transceivers with the use of band-switchable and radio frequency (RF)-micro-electromechanical systems (MEMS)-tuned resonators. The BPFs are realized with two pairs of RF switches for coarse-tuning and RF-MEMS-tunable capacitors for fine-tuning. On the one hand, for the tunable single-ended BPF, a transition between three bands is enabled using two pairs of RF switches. On the other h

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33

Zhang, Zhong‐Hai, Fei Zhao, Aiting Wu, Fang Zhihua, and Bo‐Ran Guan. "A widely tunable bandpass filter adopting novel fully tunable resonators." International Journal of RF and Microwave Computer-Aided Engineering 29, no. 6 (2018): e21684. http://dx.doi.org/10.1002/mmce.21684.

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34

Wang, San-Fu, Hua-Pin Chen, Yitsen Ku, and Yi-Chun Lin. "Versatile Tunable Voltage-Mode Biquadratic Filter and Its Application in Quadrature Oscillator." Sensors 19, no. 10 (2019): 2349. http://dx.doi.org/10.3390/s19102349.

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This paper presents a versatile tunable voltage-mode biquadratic filter with five inputs and three outputs. The proposed filter enjoys five single-ended output operational transconductance amplifiers (OTAs) and two grounded capacitors. The filter can be easily transformed into a quadrature oscillator. The filter with grounded capacitors is resistorless and electronically tunable. Either a voltage-mode five-input single-output biquadratic filter or a voltage-mode single-input three-output biquadratic filter can be operated by appropriate selecting input and output terminals. In the operation of

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35

Du, Tiejun, Boran Guan, Pengquan Zhang, Yue Gu, and Dujuan Wei. "An Intrinsically Switched Tunable CABW/CFBW Bandpass Filter." Electronics 10, no. 11 (2021): 1318. http://dx.doi.org/10.3390/electronics10111318.

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In this paper, a novel intrinsically switched tunable bandpass filter based on a dual-mode T-shaped varactor-loaded resonator is presented. The varactors loaded in the T-shaped resonator are capable of efficiently tuning the resonant frequencies of the even and odd modes, as well as the transmission-zero frequency. Without any additional RF switches, the passband of the filter can be intrinsically switched off by adjusting the transmission zero to the resonant frequencies. In the switch-on state, the constant absolute bandwidth (CABW) or constant fractional bandwidth (CFBW) passband can be ach

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36

Dinh, Anh, та Jiandong Ge. "A Q-Enhanced 3.6 GHz, Tunable, Sixth-Order Bandpass Filter Using 0.18 μm CMOS". VLSI Design 2007 (18 червня 2007): 1–9. http://dx.doi.org/10.1155/2007/84650.

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An experimental filter was designed to operate at 3.6 GHz using mainstream 0.18 μm CMOS. In the design, the Q-enhancement technique was used to overcome the low-Q characteristics of the CMOS on-chip inductors. A sixth-order bandpass filter with a wide passband and a high image rejection was built by cascading three stages of second-order Q-enhanced filters. A combination of three biquads with offset in center frequency provides wider tuning frequency and bandwidth. This high-performance filter provides a 340 MHz tunable center frequency around 3.6 GHz, an image rejection of 50 dB and a tunable

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37

Aubakirov, Konstantin Ya, and Alexander V. Makeev. "ANALOG PHASE SHIFTERS OF THE DECIMETER RANGE FOR INCREASED POWER LEVEL." Interexpo GEO-Siberia 8, no. 2 (2020): 89–93. http://dx.doi.org/10.33764/2618-981x-2020-8-2-89-93.

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The results of designing a phase control device in the decimeter wavelength range in the form of a tunable bandpass filter are presented. Tuning such a filter by 1/2 of the relative bandwidth, not exceeding 40 - 50%, provides a frequency-independent controlled phase shift. The minimization of parasitic amplitude modulation, along with an increase in the high-frequency power transmitted by the phase shifter, is achieved by optimizing the switching factor of the varicap into the quasi-polynomial bandpass filter circuit.

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38

Athamneh, Abedalgany, and Shadi A. Alboon. "Analysis of Liquid Crystal Tunable Thin-Film Optical Filters Using Signal Flow Graph Technique." International Journal of Optics 2021 (July 13, 2021): 1–4. http://dx.doi.org/10.1155/2021/5513995.

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In this paper, a liquid crystal tunable thin-film optical bandpass filter is studied and analyzed using the signal flow graph technique. This paper investigates an exact form for calculating the transmission coefficients, reflection coefficients, and the transmission intensity of the filter. The simulation results show the filter performance and the channel shape profile. In addition, the results show the tuning capability of the filter. The signal flow graph technique provides an attractive method for analyzing the thin-film optical filters since it overcomes the difficulty of the refractive

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39

Lee, Seok-Jin, and Seok-Woo Choi. "Frequency-Tunable Bandpass Filter Design Using Active Inductor." Journal of the Korea Academia-Industrial cooperation Society 14, no. 7 (2013): 3425–30. http://dx.doi.org/10.5762/kais.2013.14.7.3425.

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40

Lee, Kangho, Tae-Hak Lee, Gyu Churl Park, Hjalti H. Sigmarsson, and Juseop Lee. "Frequency-tunable bandstop-bandpass dual-function microwave filter." IEICE Electronics Express 12, no. 11 (2015): 20150313. http://dx.doi.org/10.1587/elex.12.20150313.

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41

Liu, B., F. Wei, Q. Y. Wu, and X. W. Shi. "A Tunable Bandpass Filter with Constant Absolute Bandwidth." Journal of Electromagnetic Waves and Applications 25, no. 11-12 (2011): 1596–604. http://dx.doi.org/10.1163/156939311797164819.

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42

Huang, Xiaoguo, Lei Zhu, Quanyuan Feng, Qianyin Xiang, and Dinghong Jia. "Tunable Bandpass Filter With Independently Controllable Dual Passbands." IEEE Transactions on Microwave Theory and Techniques 61, no. 9 (2013): 3200–3208. http://dx.doi.org/10.1109/tmtt.2013.2273894.

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43

Lumeau, Julien, Fabien Lemarchand, Thomas Begou, Detlef Arhilger, and Harro Hagedorn. "Angularly tunable bandpass filter: design, fabrication, and characterization." Optics Letters 44, no. 7 (2019): 1829. http://dx.doi.org/10.1364/ol.44.001829.

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44

Huang, Long, Ruoming Li, Peng Xiang, et al. "A Linearized Tunable Single Bandpass Microwave Photonic Filter." IEEE Microwave and Wireless Components Letters 26, no. 11 (2016): 963–65. http://dx.doi.org/10.1109/lmwc.2016.2615031.

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45

Peccarelli, Nicholas, and Caleb Fulton. "Adaptive Nonlinear Equalization of a Tunable Bandpass Filter." IEEE Microwave and Wireless Components Letters 29, no. 2 (2019): 149–51. http://dx.doi.org/10.1109/lmwc.2018.2887387.

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46

Ramirez-Melendez, Gustavo, M. Bello-Jimenez, O. Pottiez, and M. V. Andres. "Improved All-Fiber Acousto-Optic Tunable Bandpass Filter." IEEE Photonics Technology Letters 29, no. 12 (2017): 1015–18. http://dx.doi.org/10.1109/lpt.2017.2701644.

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47

Markov, V. B. "Tunable high-finesse narrow bandpass Fabry – Perot filter." Semiconductor Physics, Quantum Electronics and Optoelectronics 7, no. 4 (2004): 465–73. http://dx.doi.org/10.15407/spqeo7.04.465.

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48

Girbau, David, Antonio Lázaro, Esther Martínez, Diego Masone, and Lluís Pradell. "Tunable dual-band bandpass filter for WLAN applications." Microwave and Optical Technology Letters 51, no. 9 (2009): 2025–28. http://dx.doi.org/10.1002/mop.24550.

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49

Feng, Li-Ying, Hong-Xing Zheng, Cheng-Guang Sun, and Dan Cheng. "Dual-band bandpass filter with tunable upper passband." Microwave and Optical Technology Letters 53, no. 4 (2011): 888–90. http://dx.doi.org/10.1002/mop.25866.

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50

Abuelma’atti, Muhammad Taher, and Naif Almutairi. "New current-feedback operational amplifier-based bandpass shadow filter." International Journal of Electrical Engineering & Education 54, no. 1 (2016): 95–101. http://dx.doi.org/10.1177/0020720916673647.

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This article presents a new topology for implementing an electronically tunable bandpass filter using the current-feedback operational amplifier. The electronic tuning of the center frequency of the proposed circuit is achieved using an externally connected voltage amplifier in the feedback path without disturbing the constituents of the filter itself, that is a shadow filter. The proposed circuit can be used for developing an undergraduate experiment which illustrates the operation of bandpass filter and the electronic control of its center frequency using the concept of shadow filter. Experi

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