Advances in Engineering Education最新文献_第9页

Comparing planar periodic resonant structures at GHz frequencies 比较GHz频率下的平面周期谐振结构

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293396

T. Kríz

引用次数: 1

A compact design of switched line phase shifter for a microstrip phased array antenna 微带相控阵天线开关线移相器的紧凑设计

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293436

R. L. Timsina, R. Messner, Jean L. Kubwimana

{"title":"A compact design of switched line phase shifter for a microstrip phased array antenna","authors":"R. L. Timsina, R. Messner, Jean L. Kubwimana","doi":"10.1109/PIERS-FALL.2017.8293436","DOIUrl":"https://doi.org/10.1109/PIERS-FALL.2017.8293436","url":null,"abstract":"This paper presents a 1×4 microstrip Phased Array Antenna (PAA) with a uniquely designed switch line phase shifter to obtain steerable beam pattern. The antenna is designed on a Rogers RT/Duroid 6006TM dielectric substrate with a relative permittivity of 6.15. Each element of the probe fed PAA are connected to a phase shifter on a different dielectric substrate. The phase shifter has four equal length microstrip lines placed on a circular fashion around a via that connects the antenna. The circular phase shifter network feeds the antenna through the via at the center. This design is useful if a phase shifter must be integrated with an antenna in a tight space. A diode switch is placed between the microstrip traces to change the length of the transmission line. An addition of each transmission line provides a phase shift of 90°. The Arduino controlled switches can be turned ON and OFF to steer the antenna beam pattern. The maximum steering angle obtained was ±45°. The antenna is appropriate for Wi-Fi application that requires directional beam pattern, Multiple Input Multiple Output (MIMO) communications, scanning radar, and other applications requiring steerable beam pattern.","PeriodicalId":39469,"journal":{"name":"Advances in Engineering Education","volume":"71 1","pages":"1839-1844"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75888172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Application of harmonic wavelets to processing oscillating hydroacoustic signals 谐波小波在水声振荡信号处理中的应用

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293563

D. Klionskiy, D. Kaplun, V. V. Gulvanskiy, D. Bogaevskiy, S. Romanov, S. V. Kalincev

引用次数: 3

Tunable plasmon-induced transparentcy in bilayer graphene metamaterials 可调谐等离子体诱导双层石墨烯超材料的透明度

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293582

Jiang-Yu Liu, Tie-jun Huang, Pu‐Kun Liu

引用次数: 1

Electrical impedance tomography with multiplicative regularization 乘法正则化的电阻抗层析成像

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293336

Ke Zhang, Maokun Li, Fan Yang, Shenheng Xu, A. Abubakar

引用次数: 1

A stable and fast approach for measuring brillouin frequency shift 一种稳定快速测量布里渊频移的方法

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293415

Qing Bai, Yu Zhang, Yu Wang, Dong Wang, Bao-quan Jin, Yuncai Wang

{"title":"A stable and fast approach for measuring brillouin frequency shift","authors":"Qing Bai, Yu Zhang, Yu Wang, Dong Wang, Bao-quan Jin, Yuncai Wang","doi":"10.1109/PIERS-FALL.2017.8293415","DOIUrl":"https://doi.org/10.1109/PIERS-FALL.2017.8293415","url":null,"abstract":"In a conventional scheme of a Brillouin Optical Time Domain Reflector (BOTDR), an electro-optic modulator (EOM) or an acoustic optical modulator (AOM) is generally utilized to modulate the continuous light into the pulse probe light. However, the fluctuation of the working point will result in the instability of the extinction ratio when an EOM is selected, and a slow modulation speed will bring about the inability of modulating a narrow pulse when an AOM is chosen. In view of the above issue, a scheme for stably modulating the pulse probe light based on a semiconductor optical amplifier (SOA) is proposed. Meanwhile, the scheme integrates a pulse signal source with a synchronous trigger output to simplify the hardware structure of the system. Firstly, a SOA optic pulse modulator is used in the optic link to produce the pulse probe light into the sensing fiber, and coherent detection is used to obtain the beat signal of the Brillouin scattering. Moreover, the microwave frequency-sweeping method is adopted to acquire the variation curves of power with the fiber length at different frequency points. Then, the Brillouin Frequency Shift (BFS) distribution along the sensing fiber can be figured out by processing the acquired original data. Specially, in order to speed the data process, a software kernel of underlying Levenberg-Marquardt algorithm is developed based on C language, and the MFC message response mechanism and multi-thread characteristics are used to build a man-machine interface. Finally, the strain distribution along the fiber can be calculated based on the proportionality coefficient of BFS change versus strain change. The experiment results show that the BFS measurement accuracy of ±3.74 MHz is achieved over a 10.7-kilometer sensing fiber with the spatial resolution of 1.2 m, meanwhile the data processing time is reduced by about 45 times compared to that when using the LabVIEW, which indicates the stable and fast BFS measurement is realized.","PeriodicalId":39469,"journal":{"name":"Advances in Engineering Education","volume":"1 1","pages":"1729-1734"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73687357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compact band pass filter using triangular open loop resonator 采用三角形开环谐振器的紧凑型带通滤波器

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293236

Betsy George, N. Bhuvana, S. Menon

{"title":"Compact band pass filter using triangular open loop resonator","authors":"Betsy George, N. Bhuvana, S. Menon","doi":"10.1109/PIERS-FALL.2017.8293236","DOIUrl":"https://doi.org/10.1109/PIERS-FALL.2017.8293236","url":null,"abstract":"Recent developments in wireless communication challenges microwave filters with more demanding requirements such as small size, light weight, high performance and low cost. Microstrip resonator have the higher performance than the conventional filtering technique for microwave devices. A triangular open loop resonator energized using electromagnetic (EM) and edge coupling is presented in this paper. Microstrip line is modified as a triangular open-loop resonator that introduces additional capacitance and inductance by re-orientation of electromagnetic field, there by selecting the operating frequencies. Depending on the type of coupling and position of the feed used the operating frequency of the filter changed for the same dimensions. EM and edge coupling is given to the resonator, when its gives band pass filters at 2.45 GHz and the effect of each coupling techniques are studied in detail. Better size reduction is observed for EM coupling than the edge coupling. The filters characteristics are analyzed in substrate FR4 epoxy by using ANSYS High Frequency Structure Simulator (HFSS) software. The design equations for the resonator predicts the frequency with less than 2% error with the simulated frequency. The optimized triangular open loop resonators are fabricated and validated using Keysight ENA 5080A Vector network Analyser. The simulated and measured of the resonator filter are comparable for center frequency, bandwidth, return loss and attenuation.","PeriodicalId":39469,"journal":{"name":"Advances in Engineering Education","volume":"6 1","pages":"757-760"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79276138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Classification of Chinese GaoFen-3 fully-polarimetric SAR images: Initial results 中国高分三号全极化SAR图像分类:初步结果

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293225

Lu Xu, Hong Zhang, Chao Wang, Qiaoyan Fu

引用次数: 4

A 50–62 GHz compact subharmonic passive mixer MMIC with low conversion loss 低转换损耗的50-62 GHz紧凑型亚谐波无源混频器MMIC

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293188

Changzi Xie, Kaixue Ma, Shouxian Mou, F. Meng

{"title":"A 50–62 GHz compact subharmonic passive mixer MMIC with low conversion loss","authors":"Changzi Xie, Kaixue Ma, Shouxian Mou, F. Meng","doi":"10.1109/PIERS-FALL.2017.8293188","DOIUrl":"https://doi.org/10.1109/PIERS-FALL.2017.8293188","url":null,"abstract":"This paper presents a compact 50–62 GHz monolithic passive subharmonic pumped resistive mixer (SHPRM) using a 0.15-μm GaAs pHEMT foundry process. The proposed mixer requires only a half of the LO frequency compared to a fundamentally pumped and is designed in a resistive structure advantages for no drain bias and low DC currents. The mixer includes an IF filter and a scale-down marchand balun with capacitance load. To reduce conversion loss, a quarter-wavelength shorted stub at LO frequency is in parallel with LO input line, it appearing as an open circuit to the LO frequency and also provide the return paths for the RF signals. This mixer achieve a down-conversion loss of 6.55 ± 1 dB when fix LO frequency at 25 GHz and RF frequencies range 50–58 GHz, a down-conversion loss of 4.6 ± 0.6 dB when fix LO frequency at 28 GHz and RF frequencies range 56–62 GHz. In addition, the proposed mixer exhibits more than 18 dB and 30 dB of isolation for the second harmonic of the LO signal at the radio frequency (RF) ports and at the intermediate frequency (IF) ports, respectively. The chip size is 0.85 × 1.41 mm2 only. The total dc power consumption is ∼ 0mW.","PeriodicalId":39469,"journal":{"name":"Advances in Engineering Education","volume":"89 1","pages":"490-495"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84211044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A dual-frequency satellite antenna loaded with a double-arrow array 一种装有双箭头阵列的双频卫星天线

Advances in Engineering Education Pub Date : 2017-11-01 DOI: 10.1109/PIERS-FALL.2017.8293524

B. You, Hu Xu, Jianhua Zhou, Y. Shang, W. Li, T. Xue, Haike Xu

引用次数: 0