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融合协同过滤的神经Bandits推荐算法 被引量:2
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作者 张婷婷 欧阳丹彤 +1 位作者 孙成林 白洪涛 《吉林大学学报(理学版)》 CAS 北大核心 2024年第1期92-99,共8页
针对数据稀疏性和“冷启动”对协同过滤的限制以及现有的协同多臂老虎机算法不适用于非线性奖励函数的问题,提出一种融合协同过滤的神经Ba ndits推荐算法COEENet.首先,采用双神经网络结构学习预期奖励及潜在增益;其次,考虑邻居协同作用... 针对数据稀疏性和“冷启动”对协同过滤的限制以及现有的协同多臂老虎机算法不适用于非线性奖励函数的问题,提出一种融合协同过滤的神经Ba ndits推荐算法COEENet.首先,采用双神经网络结构学习预期奖励及潜在增益;其次,考虑邻居协同作用;最后,构造决策器进行最终决策.实验结果表明,该方法在累积遗憾上优于4种基线算法,推荐效果较好. 展开更多
关键词 协同过滤 多臂老虎机算法 推荐系统 冷启动
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Speech Enhancement Using Cross-Correlation Compensated Multi-Band Wiener Filter Combined with Harmonic Regeneration 被引量:1
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作者 Venkata Rama Rao Rama Murthy K. Srinivasa Rao 《Journal of Signal and Information Processing》 2011年第2期117-124,共8页
The speech signal in general is corrupted by noise and the noise signal does not affect the speech signal uniformly over the entire spectrum. An improved Wiener filtering method is proposed in this paper for reducing ... The speech signal in general is corrupted by noise and the noise signal does not affect the speech signal uniformly over the entire spectrum. An improved Wiener filtering method is proposed in this paper for reducing background noise from speech signal in colored noise environments. In view of nonlinear variation of human ear sensibility in frequency spectrum, nonlinear multi-band Bark scale frequency spacing approach is used. The cross-correlation between the speech and noise signal is considered in the proposed method to reduce colored noise. To overcome harmonic distortion introduced in enhanced speech, in the proposed method regenerate the suppressed harmonics are regenerated. Objective and subjective tests were carried out to demonstrate improvement in the perceptual quality of speeches by the proposed technique. 展开更多
关键词 SPEECH Enhancement WIENER filter Critical band and SPEECH HARMONICS
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Solar-blind ultraviolet band-pass filter based on metal–dielectric multilayer structures 被引量:1
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作者 王天娇 徐尉宗 +4 位作者 陆海 任芳芳 陈敦军 张荣 郑有炓 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第7期404-408,共5页
Solar-blind ultraviolet (UV) band-pass filter has significant value in many scientific, commercial, and military appli- cations, in which the detection of weak UV signal against a strong background of solar radiatio... Solar-blind ultraviolet (UV) band-pass filter has significant value in many scientific, commercial, and military appli- cations, in which the detection of weak UV signal against a strong background of solar radiation is required. In this work, a solar-blind filter is designed based on the concept of "transparent metal". The filter consisting of Al/SiO2 multilayers could exhibit a high transmission in the solar-blind wavelength region and a wide stopband extending from near-ultraviolet to infrared wavelength range. The central wavelength, bandwidth, Q factor, and rejection ratio of the passband are numerically studied as a function of individual layer thickness and multilayer period. 展开更多
关键词 solar-blind band-pass filter metal-dielectric multilayer
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Design and theoretical study of a polarization-insensitive multiband terahertz metamaterial bandpass filter 被引量:2
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作者 李海鹏 付文悦 +2 位作者 沈晓鹏 韩奎 王伟华 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第12期576-580,共5页
We report the design of a novel multiband metamaterial bandpass filter (BPF) in the terahertz (THz)-wave region. The designed BPF is composed of a metal-dielectric-metal sandwiched structure with three nested ring... We report the design of a novel multiband metamaterial bandpass filter (BPF) in the terahertz (THz)-wave region. The designed BPF is composed of a metal-dielectric-metal sandwiched structure with three nested rings on the top surface and a cross structure on the bottom surface. Full-wave simulation results show that the designed BPF has three transmission peaks at frequencies of 0.42, 1.27, and 1.86 THz with transmission rates of-0.87,-1.85, and-1.83 dB, respectively. Multi-reflection interference theory is introduced to explain the transmission mechanism of the designed triple-band BPF. The theoretical transmission spectrum is in good agreement with the full-wave simulated results. The designed BPF can maintain a stable performance as the incident angle varies from 0 to 30 for both transverse electric and transverse magnetic polarizations of the incident wave. The designed BPF can be potentially used in THz devices due to its multiband transmissions, polarization insensitivity, and stable wide-angle response in the THz region. 展开更多
关键词 terahertz metamaterials bandpass filter full-wave simulation multi-reflection interference theory
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Tunable Bandwidth Third Order Switched-Capacitor with Multiple Feedbacks Filter for Different Center Frequencies
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作者 Ganeshchandra N. Shinde Sanjay R. Bhagat 《Engineering(科研)》 2010年第3期179-183,共5页
This paper proposes third order tunable bandwidth active Switched-Capacitor filter. The circuit consists of only op-amps and switched capacitors. The circuit is designed for circuit merit factor Q = 10. The proposed c... This paper proposes third order tunable bandwidth active Switched-Capacitor filter. The circuit consists of only op-amps and switched capacitors. The circuit is designed for circuit merit factor Q = 10. The proposed circuit implements three filter functions low pass, band pass and high pass simultaneously in single circuit. The filter circuit can be used for both narrow as well as for wide bandwidth. For various values of cut-off frequencies the behaviour of circuit is studied. The circuit works properly only for higher central frequencies, when f0 > 10 kHz. 展开更多
关键词 Third Order filter Switched Capacitor Pass band Gain TUNABLE bandWIDTH Circuit MERIT Fac-tor
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Compact superconducting single-and dual-band filter design using multimode stepped-impedance resonator
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作者 王翔 魏斌 +2 位作者 陆喜龙 郭旭波 曹必松 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第12期617-621,共5页
This study presents two multimode stepped-impedance structures to design single-and dual-band filters. Transmission zeroes are introduced for the single-band filter by using dual-mode stepped-impedance resonators. The... This study presents two multimode stepped-impedance structures to design single-and dual-band filters. Transmission zeroes are introduced for the single-band filter by using dual-mode stepped-impedance resonators. The single-band filter with high selectivity is centered at 6.02 GHz and has a fractional bandwidth (FBW) of 25.6%. Four stubs (two low frequency and two high frequency ones) are connected to the rectangular patch in the center to construct a quadruple-mode resonator. The independent conditions of the center frequencies of the high and low bands of the resonator are analyzed. A dual-band filter, which operates at 1.53 GHz and 2.44 GHz with FWBs of 12.1% and 14.1%, respectively is designed. The single-and dual-band filters are both fabricated with double-sided YBCO films and they can be used in mobile and satellite communications. 展开更多
关键词 high-temperature superconducting bandpass filter multimode stepped-impedance resonator dual-band filter
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Lumped-equivalent circuit model for multi-stage cascaded magnetoelectric dual-tunable bandpass filter
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作者 张秋实 朱锋杰 周浩淼 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第10期481-490,共10页
A lumped-equivalent circuit model of a novel magnetoelectric tunable bandpass filter, which is realized in the form of multi-stage cascading between a plurality of magnetoelectric laminates, is established in this pap... A lumped-equivalent circuit model of a novel magnetoelectric tunable bandpass filter, which is realized in the form of multi-stage cascading between a plurality of magnetoelectric laminates, is established in this paper for convenient analysis.The multi-stage cascaded filter is degraded to the coupling microstrip filter with only one magnetoelectric laminate and then compared with the existing experiment results. The comparison reveals that the insertion loss curves predicted by the degraded circuit model are in good agreement with the experiment results and the predicted results of the electromagnetic field simulation, thus the validity of the model is verified. The model is then degraded to the two-stage cascaded magnetoelectric filter with two magnetoelectric laminates. It is revealed that if the applied external bias magnetic or electric fields on the two magnetoelectric laminates are identical, then the passband of the filter will drift under the changed external field; that is to say, the filter has the characteristics of external magnetic field tunability and electric field tunability. If the applied external bias magnetic or electric fields on two magnetoelectric laminates are different, then the passband will disappear so that the switching characteristic is achieved. When the same magnetic fields are applied to the laminates, the passband bandwidth of the two-stage cascaded magnetoelectric filter with two magnetoelectric laminates becomes nearly doubled in comparison with the passband filter which contains only one magnetoelectric laminate. The bandpass effect is also improved obviously. This research will provide a theoretical basis for the design, preparation, and application of a new high performance magnetoelectric tunable microwave device. 展开更多
关键词 microwave magnetoelectric effect lumped-equivalent circuit magnetoelectric tunable microwave device multi-stage cascaded filter
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Spoof surface plasmon-based bandpass filter with extremely wide upper stopband 被引量:2
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作者 刘小勇 祝雷 冯一军 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第3期174-177,共4页
We investigate the guiding modes of spoof surface plasmon polaritons (SPPs) on a symmetric ultra-thin plasmonic structure. From the analysis, we deduce the operating frequency region of the single-mode propagation. ... We investigate the guiding modes of spoof surface plasmon polaritons (SPPs) on a symmetric ultra-thin plasmonic structure. From the analysis, we deduce the operating frequency region of the single-mode propagation. Based on this property, a spoof SPPs lowpass filter is then constituted in the microwave frequency. By introducing a transmission zero at the lower frequency band using a pair of stepped-impedance stubs, a wide passband filter is further realized. The proposed filter is fed by.a transducer composed of a microstrip line with a flaring ground. The simulated results show that the presented filter has an extremely wide upper stopband in addition to excellent passband filtering characteristics such as low loss, wide band, and high square ratio. A prototype passband filter is also fabricated to validate the predicted performances. The proposed spoof-SPPs filter is believed to be very promising for other surface waveguide components in microwave and terahertz bands. 展开更多
关键词 spoof surface plasmon polaritons bandpass filter stop band dispersion relation
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Dual-Band Coupled-Line Bandpass Filter with Independently Tunable Bandwidths 被引量:3
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作者 Yongle Wu Lixia Nan +2 位作者 Lingxiao Jiao Weimin Wang Yuanan Liu 《China Communications》 SCIE CSCD 2016年第9期60-64,共5页
This paper reports a novel dual-band coupled-line bandpass filter.Comprising a quadruple-mode coupled-line resonator,this proposed filter could filter signals on two frequency bands.After introducing two varactors,one... This paper reports a novel dual-band coupled-line bandpass filter.Comprising a quadruple-mode coupled-line resonator,this proposed filter could filter signals on two frequency bands.After introducing two varactors,one of the four resonances could be continuously altered by changing the capacitance of the varactors,thus the two frequency bandwidths could be independently tunned.In this paper,the detailed explanation for its operation is given,and the agreement between the expected and practical performance sufficiently confirms the robustness and effectiveness of this proposed filter. 展开更多
关键词 filterS TUNABLE dual band coupled line
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Vision sensing of P-GMAW weld pool using narrow band filters with different center wavelengths 被引量:2
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作者 梁志敏 汪殿龙 王军 《China Welding》 EI CAS 2013年第1期41-46,共6页
The selection of narrow band filter's center wavelength has an important influence on the quality of the weld pool image captured in passive vision mettmd for controlling arc welding process. In this paper, 29 narrow... The selection of narrow band filter's center wavelength has an important influence on the quality of the weld pool image captured in passive vision mettmd for controlling arc welding process. In this paper, 29 narrow band filters with different center wavelengths ranging from ultraviolet to near infrared wavelength were used to capture images of weld pool during both the peak current period and the base current period of P-GMA W ( pulsed gas metal arc welding). The experimental results showed that the filters with near infrared center wavelength could weaken the arc most during the peak current period, while during the base current period the entire weld pool could be seen with the filters with wavelength above 600 nm. The camera spectral response and the radio of arc to weld pool emission were considered to analyze the phenomenon of experimental results. 展开更多
关键词 narrow band filter weld pool vision sensing pulsed gas metal arc welding
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Narrow-band high-transmittance birefringent filter and its application in wide color gamut display 被引量:1
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作者 Chi Zhang Rui Niu +3 位作者 Wenjuan Li Xiaoshuai Li Hongmei Ma Yubao Sun 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第5期401-405,共5页
We propose a narrow-band birefringent filter and its application in wide color gamut.The birefringent filter consists of five phase retarders and two polarizers,and it has both narrow band and high transmittance.In th... We propose a narrow-band birefringent filter and its application in wide color gamut.The birefringent filter consists of five phase retarders and two polarizers,and it has both narrow band and high transmittance.In the experiment,we fabricate the birefringent filter using quartz phase retarders and polarizers,and apply it in serval different displays.The color gamuts of displays are enhanced more than 30%NTSC(National Television System Committee),and the widest color gamuts that have been obtained are 126%NTSC in liquid crystal displays and 138%NTSC in organic light-emitting devices.Moreover,the deep blue light in spectrum of display can be reduced using the birefringent filter.The birefringent filter can be an efficient element to achieve wide color gamut display. 展开更多
关键词 narrow band filter wide color gamut DISPLAY
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Electrically triggered dual-band tunable terahertz metamaterial band-pass filter based on Si_3N_4–VO_2–Si_3N_4 sandwich 被引量:3
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作者 Shuai Zhao Fangrong Hu +4 位作者 Xinlong Xu Mingzhu Jiang Wentao Zhang Shan Yin Wenying Jiang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第5期111-116,共6页
We experimentally demonstrate an electrically triggered terahertz(THz) dual-band tunable band-pass filter based on Si_3 N_4–VO_2–Si_3 N_4 sandwich-structured hybrid metamaterials. The insulator–metal phase transiti... We experimentally demonstrate an electrically triggered terahertz(THz) dual-band tunable band-pass filter based on Si_3 N_4–VO_2–Si_3 N_4 sandwich-structured hybrid metamaterials. The insulator–metal phase transition of VO_2 film is induced by the Joule thermal effect of the top metal layer. The finite-integration-time-domain(FITD) method and finite element method(FEM) are used for numerical simulations. The sample is fabricated using a surface micromachining process,and characterized by a THz time-domain-spectrometer(TDS). When the bias current is 0.225 A, the intensity modulation depths at two central frequencies of 0.56 THz and 0.91 THz are about 81.7% and 81.3%, respectively. This novel design can achieve dynamically electric–thermo–optic modulation in the THz region, and has potential applications in the fields of THz communications, imaging, sensing, and astronomy exploration. 展开更多
关键词 tunable band-PASS filter hybrid metamaterials TERAHERTZ VANADIUM dioxide (VO2)
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PIM Interference Analysis under Multi-band Multi-signal Input in Duplex Indoor Distribution System 被引量:2
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作者 Pauling Huang 《China Communications》 SCIE CSCD 2007年第3期79-87,共9页
This analysis focuses on PIM interference under multi-band multi-signal input in mobile communication system.Unlike single band system that only odd order PIM(especially 3rd order) should be concerned,in multi-band mu... This analysis focuses on PIM interference under multi-band multi-signal input in mobile communication system.Unlike single band system that only odd order PIM(especially 3rd order) should be concerned,in multi-band multi-signal case,both odd and even order PIM could be interference source because of more complicated intermodulation,more IMPs generated and more receive bands.Especially,the 2nd order PIM may interfere more serious to receiving channel for its strong magnitude.In duplex indoor distribute system,the PIM interference is a potential problem to GSM900,DCS1800,CDMA,and even 3G system wireless services,because the PIM frequencies may fall in receive bands and interfere to the receiving channels.In radio system design and wireless channel assignment,precautions must be taken to minimize the PIM level and to avoid interfere to receiving channels.For practical use,the lower order possible PIM interference to 2G and 3G systems is calculated. 展开更多
关键词 PIM IMP INTERFERENCE multi-band multi-signal 2G and 3G systems
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Multi-band spectrum auction framework based on location information in cognitive radio networks 被引量:2
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作者 Yongli An Yang Xiao Guangzhi Qu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第5期671-678,共8页
Cognitive radio(CR) technology is considered to be an effective solution to allocate spectrum resources,whereas the primary users of a network do not fully utilize available frequency bands.Spectrum auction framewor... Cognitive radio(CR) technology is considered to be an effective solution to allocate spectrum resources,whereas the primary users of a network do not fully utilize available frequency bands.Spectrum auction framework has been recognized as an effective way to achieve dynamic spectrum access.From the perspective of spectrum auction,multi-band multi-user auction provides a new challenge for spectrum management.This paper proposes an auction framework based on location information for multi-band multi-user spectrum allocation.The performance of the proposed framework is compared with that of traditional auction framework based on a binary interference model as a benchmark.Simulation results show that primary users will obtain more total system revenue by selling their idle frequency bands to secondary users and the spectrum utilization of the proposed framework is more effective and fairer. 展开更多
关键词 cognitive radio spectrum auction spectrum sharing multi-band multi-USER
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Novel dual-band antenna for multi-mode GNSS applications 被引量:2
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作者 Hongmei Liu Shaojun Fang Zhongbao Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2015年第1期19-25,共7页
A novel dual-band antenna is proposed for mitigating the multi-path interference in the global navigation satellite system(GNSS) applications. The radiation patches consist of a shortedannular-ring reduced-surface-w... A novel dual-band antenna is proposed for mitigating the multi-path interference in the global navigation satellite system(GNSS) applications. The radiation patches consist of a shortedannular-ring reduced-surface-wave(SAR-RSW) element and an inverted-shorted-annular-ring reduced-surface-wave(ISAR-RSW)element. One key feature of the design is the proximity-coupled probe feeds to increase impedance bandwidth. The other is the defected ground structure band rejection filters to suppress the interaction effect between the SAR-RSW and the ISAR-RSW elements. In addition, trans-directional couplers are used to obtain tight coupling. Measurement results indicate that the antenna has a larger than 10 d B return loss bandwidth and a less than 3 d B axial-ratio(AR) bandwidth in the range of(1.164 – 1.255) GHz and(1.552 – 1.610) GHz. The gain of the passive antenna in the whole operating band is more than 7 d Bi. 展开更多
关键词 active antenna dual-band antenna multi-path interference
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HIGH-ACCURACY BAND TO BAND REGISTRATION METHOD FOR MULTI-SPECTRAL IMAGES OF HJ-1A/B 被引量:2
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作者 Lu Hao Liu Tuanjie Zhao Haiqing 《Journal of Electronics(China)》 2012年第5期361-367,共7页
Band-to-band registration accuracy is an important parameter of multispectral data. A novel band-to-band registration approach with high precision is proposed for the multi-spectral images of HJ-1A/B. Firstly, the mai... Band-to-band registration accuracy is an important parameter of multispectral data. A novel band-to-band registration approach with high precision is proposed for the multi-spectral images of HJ-1A/B. Firstly, the main causes resulted in misregistration are analyzed, and a high-order polynomial model is proposed. Secondly, a phase fringe filtering technique is employed to Phase Correlation Method based on Singular Value Decomposition (SVD-PCM) for reducing the noise in phase difference matrix. Then, experiments are carried out to build nonlinear registration models, and images of green band and red band are aligned to blue band with an accuracy of 0.1 pixels, while near infrared band with an accuracy of 0.2 pixels. 展开更多
关键词 band-to-band registration Phase correlation Singular Value Decomposition (SVD) Phase fringe filtering HJ-1A/B
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Gearbox Fault Diagnosis using Adaptive Zero Phase Time-varying Filter Based on Multi-scale Chirplet Sparse Signal Decomposition 被引量:16
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作者 WU Chunyan LIU Jian +2 位作者 PENG Fuqiang YU Dejie LI Rong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第4期831-838,共8页
When used for separating multi-component non-stationary signals, the adaptive time-varying filter(ATF) based on multi-scale chirplet sparse signal decomposition(MCSSD) generates phase shift and signal distortion. To o... When used for separating multi-component non-stationary signals, the adaptive time-varying filter(ATF) based on multi-scale chirplet sparse signal decomposition(MCSSD) generates phase shift and signal distortion. To overcome this drawback, the zero phase filter is introduced to the mentioned filter, and a fault diagnosis method for speed-changing gearbox is proposed. Firstly, the gear meshing frequency of each gearbox is estimated by chirplet path pursuit. Then, according to the estimated gear meshing frequencies, an adaptive zero phase time-varying filter(AZPTF) is designed to filter the original signal. Finally, the basis for fault diagnosis is acquired by the envelope order analysis to the filtered signal. The signal consisting of two time-varying amplitude modulation and frequency modulation(AM-FM) signals is respectively analyzed by ATF and AZPTF based on MCSSD. The simulation results show the variances between the original signals and the filtered signals yielded by AZPTF based on MCSSD are 13.67 and 41.14, which are far less than variances (323.45 and 482.86) between the original signals and the filtered signals obtained by ATF based on MCSSD. The experiment results on the vibration signals of gearboxes indicate that the vibration signals of the two speed-changing gearboxes installed on one foundation bed can be separated by AZPTF effectively. Based on the demodulation information of the vibration signal of each gearbox, the fault diagnosis can be implemented. Both simulation and experiment examples prove that the proposed filter can extract a mono-component time-varying AM-FM signal from the multi-component time-varying AM-FM signal without distortion. 展开更多
关键词 zero phase time-varying filter multi-SCALE CHIRPLET sparse signal decomposition speed-changing gearbox fault diagnosis
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Compact high-order quint-band superconducting band-pass filter
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作者 Di Wu Bin Wei +3 位作者 Xi-Long Lu Xin-Xiang Lu Xu-Bo Guo Bi-Song Cao 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第6期518-523,共6页
In this paper, we present a compact quint-band superconducting filter operating at 2.4, 3.5, 4.7, 5.3, and 5.9 GHz.Matching junctions with different impedance branch lines are used to connect a dual-band sub-filter wi... In this paper, we present a compact quint-band superconducting filter operating at 2.4, 3.5, 4.7, 5.3, and 5.9 GHz.Matching junctions with different impedance branch lines are used to connect a dual-band sub-filter with a tri-band sub-filter and to reduce the channel interactions. The quint-band filter design is divided into two sections to determine the controllable frequencies and bandwidths, while ensuring compact size and reducing design complexity. The filter is fabricated on double-sided YBCO film deposited on an Mg O substrate with a size of 26 mm×19 mm. The measured results match well with the simulations. 展开更多
关键词 high-temperature superconducting bandpass filter multi-band quint-band filter
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Design of multi-band frequency selective surfaces using multi-periodicity combined elements 被引量:1
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作者 Lu Mingyun Huang Minjie Wu Zhe 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2009年第4期675-680,共6页
Traditional multi-band frequency selective surface (FSS) approaches are hard to achieve a perfect resonance response in a wide band due to the limit of the onset grating lobe frequency determined by the array. To so... Traditional multi-band frequency selective surface (FSS) approaches are hard to achieve a perfect resonance response in a wide band due to the limit of the onset grating lobe frequency determined by the array. To solve this problem, an approach of combining elements in different period to build a hybrid array is presented. The results of series of numerical simulation show that multi-periodicity combined element FSS, which are designed using this approach, usually have much weaker grating lobes than the traditional FSS. Furthermore, their frequency response can be well predicted through the properties of their member element FSS. A prediction method for estimating the degree of expected grating lobe energy loss in designing multi-band FSS using this approach is provided. 展开更多
关键词 frequency selective surface multi-band grating lobe multi-periodicity combined element
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0.22 THz Waveguide Bandpass Filter with High Stop-Band Suppression 被引量:1
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作者 Meng-Juan Zhao Yong Zhang Shuang Liu 《Journal of Electronic Science and Technology》 CAS CSCD 2017年第3期263-266,共4页
A terahertz(THz) waveguide band-pass filter using an iris inductive window coupled structure was designed and fabricated.The filter was designed at0.22 THz with a pass band of 20 GHz.The measured results show that t... A terahertz(THz) waveguide band-pass filter using an iris inductive window coupled structure was designed and fabricated.The filter was designed at0.22 THz with a pass band of 20 GHz.The measured results show that the center frequency is 0.218 THz with a pass band of 0.205 THz to 0.231 THz,the minimum insertion loss is 1.26 d B at 0.224 THz,and the return loss is less than 13.1 d B.The stop-band suppression is65.6 d B at 0.193 THz and 51.8 d B at 0.243 THz,respectively,which means a good performance of high stop-band suppression.A good agreement exists between the measured S-parameters and the simulated ones,especially in the upper band.The proposed THz waveguide filter has potential applications in THz communications. 展开更多
关键词 Index Terms--High stop-band suppression terahertz waveguide band-pass filter
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