8 results on '"Chen, Hongyuan"'
Search Results
2. A novel design of microstrip patch antenna array with modified-I-shaped electromagnetic metamaterials applied in microwave wireless power transmission
- Author
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Wenran Lv, Yuan-wen Chen, Hang He, Xiao-ming Yang, Bo Ma, Yu Yang, Xiao-feng Du, Tian-qian Li, Chen Hongyuan, and Run-chun Deng
- Subjects
Power transmission ,Materials science ,business.industry ,HFSS ,Acoustics ,Metamaterial ,020206 networking & telecommunications ,02 engineering and technology ,Radiation ,021001 nanoscience & nanotechnology ,Homogenization (chemistry) ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Beamwidth ,0202 electrical engineering, electronic engineering, information engineering ,Wireless ,Electrical and Electronic Engineering ,0210 nano-technology ,business ,Microwave - Abstract
Distinguished from conventional inductive or resonant method, this paper presents a novel high radiation gain and narrower half-power beamwidth microstrip patch antenna (MPA) array loading with modified-I-shaped(MIS) electromagnetic metamaterials(MTM) to apply in the microwave wireless power transmission(MWPT). The MIS MTM unit cell is simulated in HFSS and the effective parameters of the meta-atom is extracted by homogenization retrieval method. Detailed single MPA numerical computing and modeled simulation is proposed step by step and optimetrics procedure in HFSS is conducted to optimize the design parameters for optimum performance. To better take advantages of the higher directive radiation gain and planer structure, a 6 × 10 × 1 MIS MTM array acting as superstrate is placed above a 2 × 2 MPA array with delicate feeding network and power distribution system. Experiment investigation indicates that the MPA array with superstrate obtained the peak value gain of 17.66 dB compared to original 13.18 dB in the operating frequency of 10 GHz. The half-power beamwidth decreased from 36.775° to 18.645° for the E-plane and reduced to 19.958° from 38.649° for the H-plane respectively. The measured results of the fabricated prototype are consistent with the simulation ones with slight discrepancy. This method offers valuable guidance for designing high efficiency transmitting antenna system in application of MWPT.
- Published
- 2018
3. Performance analysis of delayed acknowledgment scheme in UWB-based high-rate WPAN
- Author
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Chen, Hongyuan, Guo, Zihua, Yao, Richard Yuqi, Shen, Xuemin, and Li, Yanda
- Subjects
Mobile communication systems -- Research ,Wireless communication systems -- Research ,Ultra wideband technology -- Research ,Wireless technology ,Business ,Electronics ,Electronics and electrical industries ,Transportation industry - Abstract
The wireless personal area network (WPAN) is designed for short-range connectivity among fixed or portable moving devices. The ultra-wideband (UWB) technology is being defined as the physical-layer (PHY) support for the high-rate WPAN. At medium access control (MAC) layer of the WPAN, a delayed acknowledgment (Dly-ACK) or burst-ACK (B-ACK) scheme is introduced to improve the channel utilization by reducing the overhead of ACK. In this paper, the authors first study the delay performance of the Dly-ACK scheme. An analytical model is developed for the Dly-ACK mechanism, and the delay is decomposed into queuing delay and delivery delay. These delay metrics are derived, and some important observations are obtained. In particular, there exists an optimal burst size, which is determined by the input traffic load and is very insensitive to the channel error rate within a normal error-rate range. It is also demonstrated that Dly-ACK cannot work properly if the burst size is fixed. The authors then propose a dynamical Dly-ACK scheme that can adaptively change its burst size according to the queue buffer size. Simulation results show that the dynamical scheme can improve the delay performance significantly. Index Terms--Delay performance, delayed acknowledgment (Dly-ACK), ultra-wideband (UWB), wireless personal area network (WPAN).
- Published
- 2006
4. Establishment of multiplex allele-specific blocker PCR for enrichment and detection of 4 common EGFR mutations in non-small cell lung cancer
- Author
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Jie Zhang, Chen Hongyuan, Bo Su, Hongyan Chen, and Daru Lu
- Subjects
0301 basic medicine ,Mutation ,biology ,business.industry ,non-small cell lung cancer (NSCLC) ,Cancer ,General Medicine ,medicine.disease_cause ,medicine.disease ,Minor allele frequency ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,030220 oncology & carcinogenesis ,medicine ,Cancer research ,biology.protein ,Multiplex ,Epidermal growth factor receptor ,Liquid biopsy ,Lung cancer ,business - Abstract
Background Lung cancer is one of the most severe cancers and the majority of patients miss the best timing for surgery when diagnosed, thus having to rely on radiotherapy, chemotherapy or target therapy. Epidermal growth factor receptor (EGFR) upregulation occurs in a large percentage of patients, who can then benefit from tyrosine kinase inhibitors (TKI). However, the EGFR mutations they carry will vary the effectiveness of TKI. Circulating tumor DNA (ctDNA) contains genetic information from cancer tissue that can be used as a liquid biopsy by non-invasive sampling. This study aimed to provide a solution for minor allele detection from ctDNA. Methods Our novel method, named multiplex allele-specific blocker PCR (MAB PCR), combines amplification refractory mutation system (ARMS), blocker PCR and fluorescent-labeled probes for better discrimination and higher throughput. MAB PCR was specially designed for low-quality samples such as ctDNA. A sensitive assay based on MAB PCR was developed for enriching and detecting four common EGFR mutations. This assay was optimized and evaluated with manufactured plasmids, and validated with 34 tissue samples and 94 plasma samples. Results The limit of detection of this assay was 102 copies and the detection sensitivity reached 0.1% mutant allele fraction (MAF). The results of clinical sample testing had 100% accordance with sequencing, which proved that this assay was accurate and applicable in clinical settings. Conclusions This assay could accomplish low-cost and rapid detection of 4 common EGFR mutations sensitively and accurately, which has huge potential in clinical usage for guiding medication. Furthermore, this design could be used to detect other mutations.
- Published
- 2020
5. Gain enhancement of transmitting antenna incorporated with double-cross-shaped electromagnetic metamaterial for wireless power transmission
- Author
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Tian-qian Li, Lin Zhou, Xiao-feng Du, Yuan-wen Chen, Hang He, Xiao-ming Yang, Yong Mingyang, Bo Ma, Jiao Chen, Chen Hongyuan, and Ao Lin
- Subjects
010302 applied physics ,Patch antenna ,Materials science ,business.industry ,HFSS ,Antenna aperture ,020206 networking & telecommunications ,02 engineering and technology ,Antenna factor ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Radiation pattern ,Microstrip antenna ,Optics ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,Antenna gain ,business ,Metamaterial antenna - Abstract
This paper proposes a novel approach to enhance the aperture efficiency of the transmitting microstrip patch antenna (MPA) by designing a new inclusion of double-cross-shaped metamaterial (DCSM) superstrate applied in microwave wireless power transmission(WPT). Overall WPT model and transmitting antenna selection are briefly introduced and numerical simulation is conducted in HFSS. Homogenization retrieval method based on transmission and reflection coefficients is utilized to calculate the effective parameters of the DCSM unit cell, electric field and surface current distribution are displayed to qualitatively explain the occurrence of negative permittivity and permeability. The Matlab2008a script is also presented to calculate the geometry dimensions of the corresponding conventional patch antenna operating at desired resonant frequency. Simulation results indicate that the gain of the transmitting antenna increases from 7.46 dB to 12.35 dB after loading with the 6 × 3 × 1 array DCSM MTM as the superstrate, the measured gain increases from 7.1 dB to 12.21 dB thus an enhancement of 184% for the transmitting antenna's aperture efficiency is obtained which is of significant value for the whole WPT system. For the last section of our paper, electric field of the transmitting MPA before and after loading with DCSM superstrate are illustrated to gain insight physical mechanism of the gain enhancement.
- Published
- 2016
6. Gain and directivity enhancement of microstrip antenna loaded with multiple splits octagon-shaped metamaterial superstrate
- Author
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Yuan-wen Chen, Hang He, Jiao Chen, Bang-Ji Wang, Tian-qian Li, Chen Hongyuan, Ao Lin, Xiao-ming Yang, and Bo Ma
- Subjects
010302 applied physics ,Materials science ,HFSS ,Frequency band ,business.industry ,Mechanical Engineering ,Bandwidth (signal processing) ,Metamaterial ,Near and far field ,Condensed Matter Physics ,01 natural sciences ,Directivity ,Microstrip ,Electronic, Optical and Magnetic Materials ,Microstrip antenna ,Optics ,Mechanics of Materials ,0103 physical sciences ,Electrical and Electronic Engineering ,010306 general physics ,business - Abstract
This paper presents a novel multiple splits octagon-shaped metamaterial which exhibits double left-handed frequency bands roughly from 9.25 GHz to 9.68 GHz and from 15.28 GHz to 15.36 GHz derived from the transmission characteristics by homogenization retrieval method. Two conventional microstrip patch antennas whose resonance frequency bands are located at the first left-handed frequency band and the second one respectively are designed to further investigate the influence by loading the proposed metamaterial as its superstrate. HFSS simulation numerical results indicate that the far field radiation directivity half-power bandwidth(HPBW) of the E-plane and H-plane have reduced by 64%, 63.7% and 59.4%, 59%, and the maximal gain increases from 8.251 dB to 11.024 dB and from 8.5432 dB to 11.9653 dB respectively after loading with the multiple splits octagonal metamaterial superstrate.
- Published
- 2016
7. Aggregation based Cell Selection Methods for multi-RAT HetNet
- Author
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Kan Shanlei, Chen Hongyuan, Yuanping Zhu, and Li Wenda
- Subjects
Computer science ,business.industry ,05 social sciences ,050801 communication & media studies ,020206 networking & telecommunications ,Throughput ,02 engineering and technology ,Interference (wave propagation) ,Cell selection ,0508 media and communications ,Transmission (telecommunications) ,User equipment ,Wireless lan ,0202 electrical engineering, electronic engineering, information engineering ,business ,Heterogeneous network ,Computer network - Abstract
To tackle the challenge of surging data rate demand, heterogeneous network (HetNet) composed of multiple radio access technologies (RATs) has been proposed as one promising solution. In addition, the LTE and WLAN Aggregation (LWA) architecture was specified recently, but few existing network selection algorithm takes consideration on the cooperation between RATs. In this paper, we propose new Aggregation based Cell Selection Methods (ACSMs) in order to deal with the cell selection problem for network with LWA architecture. The ACSM calculates the transmission ability of aggregated WLAN into the corresponding eNB's utility function. Simulation results validate that ACSM is effective for user equipment (UE) to select a suitable cellular serving cell to improve the network throughput and quality of user experience as well as the fairness among users.
- Published
- 2016
8. A high mobile full solid-state medium range surveillance radar
- Author
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Zhang Yapeng, Hua Haigen, Chen Hongyuan, and Wang Jun
- Subjects
Engineering ,business.industry ,Real-time computing ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Fire-control radar ,Radar lock-on ,Continuous-wave radar ,Man-portable radar ,Bistatic radar ,Radar engineering details ,Radar imaging ,3D radar ,business ,Remote sensing - Abstract
This paper describes a new highly mobile medium range surveillance radar (YLC-6 radar), which is developed by NRIET. The YLC-6 radar utilizes highly mobile technology, full solid-state transmitter, and an advanced MTD processor to enhance the radar survival capability and tactical performance. This new generation mobile medium range low altitude surveillance radar has military and civil applications.
- Published
- 2002
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