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oe1(光电查) - 科学论文

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出版时间
  • 2019
研究主题
  • mixed coupling
  • stepped impedance resonator (SIR)
  • dual-band filter
  • double-layer
应用领域
  • Electronic Science and Technology
机构单位
  • Tianjin University
  • University of Electronic Science and Technology of China
  • Singapore University of Technology and Design
78 条数据
?? 中文（中国） ▾

  • [IEEE 2019 IEEE/MTT-S International Microwave Symposium - IMS 2019 - Boston, MA, USA (2019.6.2-2019.6.7)] 2019 IEEE MTT-S International Microwave Symposium (IMS) - A Compact Waveguide Quasi-Elliptic Dual-Band Filter

    摘要： This paper presents a novel configuration of dual-band filter employing TE11m dual-mode elliptical cavity resonators. The proposed side-coupled configuration leads to a significant reduction of filter footprint compared to previously reported dual-band filter structures. Such configuration also facilitates cross-couplings to realize advanced quasi-elliptic filter functions. To demonstrate the concept, an 8-pole C-band elliptical cavity dual-band filter is designed, manufactured and measured.

    关键词： dual-mode resonator,transmission zeros,dual-band filter,waveguide

    更新于2025-09-12 10:27:22

  • [IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Dual-band electromagnetically induced transparency effect in asymmetrically coupled terahertz metamaterials

    摘要： In this article, we numerically and experimentally investigate a metamaterial geometry capable of exhibiting dual-band electromagnetic induced transparency (EIT) effect in terahertz frequency regime. The meta-molecule unit consists of two asymmetric C resonators, placed alternately on both sides of a cut-wire (CW). The near field coupling between the CW and C resonators of the MM structure leads to the evolution of the dual-band EIT effect. We observe that the dual-band EIT effect can be modulated by changing the distance between the CW and the 2C resonators. Our study can play an important role in the development of multi-band slow light devices, modulators and also for sensing applications.

    关键词： sensing,modulators,slow light devices,metamaterials,dual-band electromagnetically induced transparency,terahertz

    更新于2025-09-12 10:27:22

  • [IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - Dual-Band Open Metal Waveguide Slot Antennas

    摘要： The paper describes designs and simulations of new dual-band antennas. The designs exploit the resonance and radiating properties of the H00 mode of metal open waveguides. The proposed antennas are formed by two metal sheets of symmetrical shapes separated by a S-shape slot. The slot is backed by curved metal screens connected to the metal sheets forming an open waveguide. The slot ends are open and a 50Ohm transmission line connected to the middle of the slot is used as the antenna feed. It has been shown that the antenna designs can operate in WiFi bands without additional tuning. The antenna operational bandwidth in the lower band is about 70% and in the upper band is higher than 37%. The antenna designs are very simple and low-cost and can be efficiently used in various communication devices.

    关键词： open waveguide,antenna,slot antenna,directivity,dual-band antennas

    更新于2025-09-12 10:27:22

  • All-Dielectric Terahertz Plasmonic Metamaterial Absorbers and High-Sensitivity Sensing

    摘要： Two types of plasmonic metamaterial absorbers (PMAs) formed from patterned all-dielectric resonators are designed and demonstrated experimentally in the terahertz (THz) range. Both PMAs use a simple grating design on highly N-doped silicon. The first shows broadband absorption with near-perfect peak absorbance at 1.45 THz and a bandwidth of 1.05 THz for 90% absorbance, while the second is a dual-band absorber. Experiments show that the second absorber has two distinct absorption peaks at 0.96 and 1.92 THz with absorption rates of 99.7 and 99.9%, respectively. A fundamental cavity mode coupled to coaxial surface plasmon polaritons is responsible for the characteristics of both PMAs. Additionally, the optically tunable responses of these all-dielectric absorbers demonstrate that the absorption behavior can be modified. The quality factor (Q) values of the dual-band resonances are 4.6 and 7.8 times larger than those of the broadband PMAs, respectively, which leads to a better sensing performance. As an example, the two proposed PMAs act as high-sensitivity sensors and demonstrate considerable potential for chlorpyrifos detection. These results show that these PMAs can be used as sensors that can detect the presence of trace pesticides in adsorption analyses, among other practical applications.

    关键词： broadband absorption,all-dielectric resonators,plasmonic metamaterial absorbers,chlorpyrifos detection,dual-band absorber,terahertz,high-sensitivity sensors

    更新于2025-09-12 10:27:22

  • Quasi-Elliptic Waveguide Dual-Band Bandpass Filters

    摘要： This article presents a novel folded configuration of dual-band filter employing TE11m dual-mode elliptical cavity resonators. The proposed side-coupled configuration leads to a significant reduction of filter footprint compared with previously reported in-line dual-band filter structures. Such configuration also facilitates cross couplings to realize advanced quasi-elliptic filter functions. The structure employs irises for both sequential and cross couplings. The limitations of bandwidth realization and spurious-free window are analyzed in detail, and new coupling structures are proposed to improve the overall in-band and out-of-band responses. All the proposed dual-band designs have low insertion loss and allow for independent control of each frequency and coupling parameter. To demonstrate the concept, two 8-pole C-band elliptical cavity dual-band filters are designed, manufactured, measured, and compared. To the best of the authors’ knowledge, this is the first reported folded dual-band filter configuration based on metallic waveguide cavities.

    关键词： elliptical cavity,transmission zeros (TZs),waveguide,dual-band filter,dual-mode resonator,folded structure,Bandwidth

    更新于2025-09-11 14:15:04

  • Integration of MoS <sub/>2</sub> with InAlAs/InGaAs Heterojunction for Dual Color Detection in Both Visible and Near‐Infrared Bands

    摘要： At present, dual-channel or even multi-channel recording is a developing trend in the field of photodetection, which is widely applied in environment protection, security, and space science and technology. This paper proposes a novel MoS2/InAlAs/InGaAs n–i–n heterojunction phototransistor by integrating multi-layered MoS2 with InGaAs-based high electron mobility transistors (InGaAs-HEMTs). Due to the internal photocurrent amplification in the InGaAs channels with a narrow energy bandgap of 0.79 eV, this device exhibits high photoresponsivity (R) of over 8 × 105 A W–1 under near-infrared illumination of 1550 nm at 500 pW. Furthermore, with the combination of the photoconductance effect in the vertical MoS2/InAlAs/InGaAs n–i–n heterojunction and the photogating effect in the lateral phototransistor, this device possesses a unique characteristic under visible illumination that its photoresponsivity can be tuned by the top gate electrode from 6 × 105 A W–1 to -4 × 105 A W–1 by gate voltage. This may lead to a new application as an optically controlled electronic inverter, which needs further study in depth. This MoS2/InAlAs/InGaAs phototransistor builds up a new bridge between 2D materials and conventional ternary compounded semiconductor devices.

    关键词： MoS2/InAlAs/InGaAs van der Waals heterojunction,gate-tunable negative/positive responsivity,dual-band photodetection,2D electron gas

    更新于2025-09-11 14:15:04

  • [IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Independently tunable dual-band metamaterial absorber based on graphene at mid-infrared frequencies

    摘要： Despite the great achievement in understanding of the graphene-based metamaterial absorbers (GMAs), the limitations such as single narrowband absorption, low absorption peak and multiple bands that can’t be independently tuned have not been completely overcome. This paper reports a dual-band absorber through etching two cascaded metallic resonators with different sizes in the unit cell of GMA. Two independently tunable absorption bands with absorption peaks greater than 99% are obtained at mid-infrared frequencies.

    关键词： dual-band,independently tunable,metamaterial absorber,mid-infrared,graphene

    更新于2025-09-11 14:15:04

  • [IEEE 2018 IEEE International RF and Microwave Conference (RFM) - Penang, Malaysia (2018.12.17-2018.12.19)] 2018 IEEE International RF and Microwave Conference (RFM) - High Gain Dual-band Low-frequency Scaled Transparent THz Antenna for Satellite Systems

    摘要： A transparent dual-band antenna resonating at both 750 GHz and 1.1 THz fed through an aperture is designed. Loss evaluations of the applied materials for both the conductors and the transparent substrate are investigated. After simulation in THz range, the proposed antenna is low frequency scaled to resonate at (0.75 GHz, 1.1 GHz) and (7.5 GHz, 11 GHz) to show its ability of working in THz bands. The scaled antennas are fabricated on the FR4 substrate with the permittivity of 4.3 and thickness of 1.6 mm and then a layer of ITO is added to increase the gain and efficiency.

    关键词： dual-band,scaled,transparent,gain,loss

    更新于2025-09-11 14:15:04

  • [IEEE 2019 IEEE/MTT-S International Microwave Symposium - IMS 2019 - Boston, MA, USA (2019.6.2-2019.6.7)] 2019 IEEE MTT-S International Microwave Symposium (IMS) - Dual-band Bandpass Filter Design with Novel Double-layer Mixed Coupled SIR/CPW-SIR Resonators

    摘要： This paper presents a compact 2.4-/5.2GHz dual-band bandpass filter (BPF) design using novel double-layer mixed coupled SIR/CPW-SIR resonators. To miniaturize the footprint, the SIR is built on the top layer with CPW-SIR on the bottom layer. The coupling is tunable by modifying the resonator geometries. The characteristics of the novel resonator are studied which is suitable for dual-band applications. The fractional bandwidth (FBW) design graph is constructed for a straightforward dual-band filter synthesis. To validate our design theory, a fourth-order dual-band BPF prototype is design and fabricated. The measurement shows insertion losses of 1.7/2.95 dB with a 3-dB FBW of 12/10% at 2.4-/5.2-GHz bands, return loss of greater than 10 dB, inter-band isolation of greater than 30 dB, and stopband rejection above 15 dB up to 10 GHz. The filter has a compact size of 500×500 mil2.

    关键词： mixed coupling,stepped impedance resonator (SIR),dual-band filter,double-layer

    更新于2025-09-11 14:15:04

  • [IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Dual-Band Dual-Polarization Transparent Metasurface Design

    摘要： This paper proposes a dual-band dual-polarization transparent metasurface centered respectively at 2.12 GHz and 4.85 GHz. The unit cell of the proposed metasurface is composed of three metallic layers where two intermediate dielectric layers are sandwiched inbetween. When an incident wave impinges the surface, orthogonal polarizations can be obtained for transmitted waves in the two operation bands. Design details and numerical analysis are presented and discussed.

    关键词： dual-band,dual-polarization,metasurface

    更新于2025-09-10 09:29:36