- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Modified Antipodal Vivaldi Antenna with Elliptical and Sinusoidal-Shaped Loads
摘要： This paper proposes a novel method of designing an ultra-wideband Antipodal Vivaldi Antenna with Elliptical and Sinusoidal-shaped Loads. The modified antenna shows better at low cut-off frequency in terms of return loss and gain throughout a bandwidth from 800MHz to 20GHz with good performance.
关键词： Antipodal Vivaldi Antenna (AVA),Ultra wideband (UWB),loaded
更新于2025-09-19 17:15:36
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[IEEE 2020 12th International Conference on Knowledge and Smart Technology (KST) - Pattaya, Chonburi, Thailand (2020.1.29-2020.2.1)] 2020 12th International Conference on Knowledge and Smart Technology (KST) - Resource Balanced Service Chaining in NFV-enabled Inter-Datacenter Elastic Optical Networks
摘要： In this paper, a wideband ?ltering power divider (PD) with ultra-wideband harmonic suppression and isolation is proposed. The dual coupled-line sections are embedded to the conventional quarter-wavelength transmission lines, which helps to extend the passband of the PD. With the introduction of the short-circuit stubs shunted at the output ports and the coupled lines with the open-circuit stubs, the ultra-wide stopband can be implemented more ef?ciently, thus resulting in ?ve transmission zeros from 2 to 6 GHz. Furthermore, the improved isolation structure with series connected a resistor and a capacitor can be utilized to realize the ultra-wide isolation frequency band. Using a single resistor between two output ports, we have achieved an excellent in-band isolation. For demonstration, a wideband ?ltering PD operating at 1 GHz with a 20-dB bandwidth of 50% and an ultra-wide stopband better than 20 dB from 2 to 6 GHz is designed, fabricated, and measured. The measured results agree well with the anticipation.
关键词： improved isolation,harmonic suppression,ultra-wideband,coupled-line,Filtering power divider
更新于2025-09-19 17:13:59
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[IEEE 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - HangZhou, China (2018.9.5-2018.9.7)] 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - Investigation of Ultra-wideband Ridged Half-Mode Substrate-Integrated Waveguide Coupler
摘要： In this paper, a novel ultra wideband (UWB) 3-dB coupler at X and Ku band based on ridged half-mode substrate integrated waveguide (RHMSIW) and embedded the shape of metal groove is designed, fabricated, and measured, which is widely used in microwave and millimeter wave circuits. The structural parameters of new UWB RHMSIW 3-dB coupler with three cascading metal groove cells are analyzed. The structure is simulated with a relative bandwidth of 48% at the center frequency of 15 GHz. The measured results show that the proposed RHMSIW coupler keeps good performance of the HMSIW coupler. Simulated results are in agreement with the measured results. The results show that the novel UWB RHMSIW 3-dB coupler can provide better performance and have a smaller size compared with reported couplers, which illustrates its application in the wideband millimeter wave systems.
关键词： metal groove,ultra wideband,coupler,Ridged half-mode substrate integrated waveguide (RHMSIW)
更新于2025-09-19 17:13:59
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Numerical Simulation of Chaotic Ultra-Wideband Fiber Communication
摘要： A long-distance high-rate chaotic ultra-wideband fiber communication system at 1.31nm wavelength is presented and simulated successfully. The amplitude or intensity of digital modulation and demodulation of the chaotic ultra-wideband fiber communication are discussed.
关键词： Fiber communication,Ultra-Wideband,Chaos
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE Industry Applications Society Annual Meeting - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Industry Applications Society Annual Meeting - Simplified Photo-Electro-Thermal Model Applied to Resonant-Switched-Capacitor-Based OLED Drivers
摘要： The high precision ranging using ultra wideband (UWB) signals is expected for various applications. However, UWB requires mitigation of narrowband interference (NBI) from other wireless systems. There have been many studies of adaptive notch ?lters to cope with NBI at various frequencies. This paper proposes a novel NBI mitigation method which utilizes frequency dependence characteristics in array antennas. We use power inversion to direct nulls to large-power input, which realizes NBI only suppression with a small calculation cost. The results show that the proposed method can obtain lower bit error rate. The proposed method can cope with variously directional and multiple-frequency NBIs without a priori knowledge of the incident waves.
关键词： time of arrival (TOA),power inversion,Ultra wideband (UWB)
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE MTT-S International Wireless Symposium (IWS) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 IEEE MTT-S International Wireless Symposium (IWS) - A Self-Packaged Ultra-Wide Band Bandpass Filter Using Integrated Substrate Gap Waveguide
摘要： An ultra-wideband bandpass (UWB) filter using integrated substrate gap waveguide (ISGW) technology is proposed, which has ultra-wideband and high selectivity. The UWB ISGW bandpass filter structure consists of three layer dielectric substrates, the top substrate uses metallic via-holes and metallic patches to implement perfect magnetic conductor (PMC) structure, which is suitable for packaging substrate integrated waveguide (SIW) filters to avoid external interference and loss caused by radiation and internal radiation leakage, the middle layer substrate provides a stable gap layer, and the base substrate is used to obtain a SIW filter by etching the slots in the metal plane and placing metallic via-holes in the middle of the layer, i.e. a self-packaged UWB ISGW filter. The proposed filter was fabricated and tested at a center frequency of 17.5 GHz as an example. The measurements show that the filter has a passband from 14.4 to 20.7 GHz, i.e. This filter has a fractional bandwidth (FBW) of 36%, and an insertion loss of 0.91 dB. More importantly, thanks to ISGW, two transmission zeros are obtained at 12.9 and 22.1 GHz to improve high selectivity.
关键词： packaging,Integrated substrate gap waveguide (ISGW),Bandpass filter (BPF),Ultra-wideband (UWB)
更新于2025-09-12 10:27:22
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A NOVEL RECONFIGURABLE UWB FILTERING-ANTENNA WITH DUAL SHARP BAND NOTCHES USING DOUBLE SPLIT RING RESONATORS
摘要： This study presents a novel technique for designing an ultra-wideband (UWB) filtering-antenna with dual sharp band notches. This design is composed of a modified monopole antenna integrated with resonant structures. The monopole antenna is modified using microstrip transition between the feedline and the patch. In addition, block with a triangle-shaped slot is loaded on each side of the ordinary circular patch to produce wide bandwidth with better return loss and higher frequency skirt selectivity. The resonant structures are constructed using two double split ring resonators (DSRR) loaded above the ground plane of the antenna to produce dual band notches and filter out WiMAX (3.3–3.7 GHz) and HiperLAN2 (5.4–5.7 GHz) frequencies. The band notch position is controlled by varying the length of the DSRR. The reconfigurability feature is achieved by using two PIN diode switches employed in the two DSRR. The measured results show that the proposed filtering-antenna provides wide impedance bandwidth from 2.58 to 15.5 GHz with controllable dual sharp band notches for WiMAX and HiperLAN, peak realized gain of 4.96 dB and omnidirectional radiation pattern.
关键词： double split ring resonators (DSRR),dual sharp band notches,filtering-antenna,PIN diode switches,WiMAX,HiperLAN2,Ultra-wideband (UWB)
更新于2025-09-10 09:29:36
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Scatterer Surface Design for Wave Scattering Application
摘要： In this paper, radio wave scattering is considered and an optimal scatterer surface is realized. For this purpose, an ultra-wideband and high-efficiency polarization converter unit-cell is proposed. Here, the proposed polarization converter unit-cell and its mirror are combined to provide 180? phase difference for scattering purposes. The desired combination of unit-cells which produces uniform scattering pattern and maximum wave attenuation achieved employing group search optimization (GSO) algorithm. For the problem at hand, the GSO optimization algorithm is presented in bi-level format including master and slave levels. Simulation and experimental results showed that the 10 dB bandwidth of normalized RCS reduction is achieved in ultra-wideband ranging from 5.5 GHz to 20.51 GHz with a fractional bandwidth of 115%, assuring a favorable performance of the proposed method. In addition, a wide angle bistatic RCS reduction over a wide frequency band is attained.
关键词： scatterer structure,ultra-wideband,radio-wave scattering,Polarization rotation (PR)
更新于2025-09-10 09:29:36
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All-optical notch filters for ultra-wideband chaotic communications
摘要： In this paper, a wideband all-optical notch ?lter is proposed using two cascaded modi?ed add-drop resonators from chalcogenide glass (ChG) and GaAsInP-InP waveguide materials. The system consists of ChG main ring and two small side rings called phase modulators made of the GaAsInP-InP materials. The plane waves are fed at the input and add ports, from which the chaotic signal outputs can be generated by the nonlinear e?ect induced into the center ring. The results have been simulated based on the scattering matrix method. Results have shown that the generated chaotic signals can be used for switching and secured communications. An ultra-fast switching time of ～ 2 attoseconds is achieved. Moreover, the chaotic signals can be ?ltered by the stop band ?lters (notch ?lters). The free spectral range (FSR) of two cascaded ChGs is 1494.8 nm. The output wavelength of the notch ?lters is tunable from 748.0–2242.2 nm and 2242.8–3737.0 nm. The band-stop of the notch ?lter is 1494.2 nm. This approach will allow the implementation of the compact, and integrated notch ?lters in an on-chip scale circuit, which is useful for both light ?delity (LiFi) and wireless ?delity (WiFi) applications.
关键词： WiFi,all-optical notch ?lters,chalcogenide glass,GaAsInP-InP,scattering matrix method,ultra-wideband chaotic communications,LiFi
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - A Vertically-Polarized Ultra-Wideband, Low-Profile and Folded Half Vivaldi Antenna
摘要： A vertically-polarized, ultra-wideband (UWB), low-profile Vivaldi antenna is presented in this paper. Only half of the Vivaldi is placed perpendicularly to the ground plane to achieve vertical polarization. The upper part of the antenna is folded into a right angle to achieve a low-profile. The rectangular slotlines are used to improve VSWR and enhance the gain at the end-fire orientation in the operating frequency band, and a 50? coaxial probe connects directly with the end of taper slot for feeding purpose. The total sizes are 100 (length) × 50 (width) × 16 (height) mm3. Simulated results show that the designed antenna exhibits a bandwidth from 3.2 to 24 GHz (7.5:1) for VSWR<2.2, and stable radiation patterns in 3 ~ 16 GHz.
关键词： vivaldi antenna,ultra-wideband,vertical polarization,rectangular slotline
更新于2025-09-10 09:29:36