期刊文献+
共找到16篇文章
< 1 >
每页显示 20 50 100
Analysis of electrical performances of planar active phased array antennas with distorted array plane 被引量:8
1
作者 Wang Congsi Bao Hong +1 位作者 Zhang Fushun Feng Xingang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2009年第4期726-731,共6页
The influence of the distorted plane of the active phased array antenna on the electromagnetic performance is of great significance to the research on and development of the high-performance antennas. On the bent and ... The influence of the distorted plane of the active phased array antenna on the electromagnetic performance is of great significance to the research on and development of the high-performance antennas. On the bent and bowl-shape distortion, the model is established of the relationship between the electromagnetic performance and the position error of the radiated elements. The method is presented of analyzing the far-field pattern of the distorted rectangular active phased array antenna. The analysis results of a planar phased array antenna with different distortions grades prove the validity of the model. Therefore, by the method, the antenna designers may set the reasonable requirement on the structural tolerance in manufacturing antenna. 展开更多
关键词 active phased array antenna distortion error radiated element structural tolerance
下载PDF
Photonic microwave true time delays for phased array antennas using a 49 GHz FSR integrated optical micro-comb source[Invited] 被引量:6
2
作者 XINGYUAN Xu JIAYANG Wu +6 位作者 THACH G.NGUYEN TANIA MOEIN SAI T.CHU BRENT E.LITTLE ROBERTO MORANDOTTI ARNAN MITCHELL DAVID J.Moss 《Photonics Research》 SCIE EI 2018年第5期I0055-I0061,共7页
We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectra... We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems. 展开更多
关键词 Photonic microwave true time delays for phased array antennas a 49 GHz FSR integrated optical micro-comb source
原文传递
Optical true time-delay for two-dimensional phased array antennas using compact fiber grating prism 被引量:1
3
作者 魏永峰 袁超伟 +4 位作者 黄善国 高欣璐 周静 韩曦 顾畹仪 《Chinese Optics Letters》 SCIE EI CAS CSCD 2013年第10期39-42,共4页
A two-dimensional(2D) optical true-time delay(TTD) beam-forming system using a compact fiber grating prism(FGP) for a planar phased array antenna(PAA) is proposed. The optical beam-forming system mainly consists of a ... A two-dimensional(2D) optical true-time delay(TTD) beam-forming system using a compact fiber grating prism(FGP) for a planar phased array antenna(PAA) is proposed. The optical beam-forming system mainly consists of a TTD unit based on the same compact FGP, one tunable laser for elevation beam steering, and a controlled wavelength converter for azimuth beam steering. A planar PAA using such 2D optical TTD unit has advantages such as compactness, low bandwidth requirement for tunable laser sources, and potential for large-scale system implementations. The proof-of-concept experiment results demonstrate the feasibility of the proposed scheme. 展开更多
关键词 time Optical true time-delay for two-dimensional phased array antennas using compact fiber grating prism TTD FGP
原文传递
Optical True Time Delay for Phased Array Antennas Composed of 2×2 Optical MEMS Switches and Fiber Delay Lines
4
作者 Back-Song Lee Jong-Dug Shin Boo-Gyoun Kim 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期487-488,共2页
We proposed an optical true time delay (TTD) for phased array antennas (PAAs) composed of 2×2 optical MEMS switches, single-mode fiber delay lines, and a fixed wavelength laser diode. A 3-bit TTD for 10 GHz PAAs ... We proposed an optical true time delay (TTD) for phased array antennas (PAAs) composed of 2×2 optical MEMS switches, single-mode fiber delay lines, and a fixed wavelength laser diode. A 3-bit TTD for 10 GHz PAAs was implemented with a time delay error less than ± 0.2 ps. 展开更多
关键词 for TTD in MEMS Optical MEMS Switches and Fiber Delay Lines Optical True Time Delay for phased array antennas Composed of 2 of
原文传递
Design of Ka-Band Phased Array Antenna with Calibration Function
5
作者 Xiao Liu Xingyao Zeng +5 位作者 Chengxiang Hao Haibo Zhang Zhongjun Yu Ting Lv Meng Li Zhen Zhang 《Computers, Materials & Continua》 SCIE EI 2023年第3期6251-6261,共11页
In this paper,we have proposed a novel structure of Ka-band based phased array antenna with calibration function.In the design of Kaband antenna,the active phased array system is adopted and the antenna would work in ... In this paper,we have proposed a novel structure of Ka-band based phased array antenna with calibration function.In the design of Kaband antenna,the active phased array system is adopted and the antenna would work in the dual polarization separation mode.We have given out the schematic diagram for the proposed Ka-band antenna,where the Kaband antenna is in the form of waveguide slot array antenna,with 96 units in azimuth and 1 unit in distance.Each group of units is driven by a singlechannel Transmitter/Receiver(T/R)component,and the whole array contains 192 T/R components in total.The size of the T/R component is 55mm(length)×50mm(width)×5.8mm(height),3 Sub-micro Sub-Miniature Push-on(SSMP)blind sockets and a 21-core low-frequency socket are designed on the two sides of the T/R component.In order to meet the technical specifications of phased array antenna,the Ka-band transceiver component is designed based on Low Temperatrue Co-fired Ceramic(LTCC)technology to achieve miniaturization and lightweight.In our approach,the feed network includes two parts:transceiver network and calibration network.The transceiver network consists of 241:8 time-delay power dividers,12 two-way power dividers and 2 six-way time-delay power dividers.The power supply required by theKaband antenna unit is provided to each active component by the power module after Ka band wavelet control distribution.Simulation and measurement results are given in the form of standing wave and scanning capability. 展开更多
关键词 KA-BAND phased array antenna T/R module
下载PDF
Optimum Design of Impedance Simulator for Phased Array Antnnas
6
作者 吕昕 李世智 《Journal of Beijing Institute of Technology》 EI CAS 1994年第1期63+59-63,共6页
The impedance of a solid state active phased array antenna varing with frequency and beam scanning scanning angle be matched with the solid state active matching network (SSAMN). In order to adjust and measure the rad... The impedance of a solid state active phased array antenna varing with frequency and beam scanning scanning angle be matched with the solid state active matching network (SSAMN). In order to adjust and measure the radar conveniently and Securely, it is necessary for the impedance of the simulator of the phased array antennas to be optimized.Having selected the PIN dilde controlling circuits and the circuit parameters optimized,the simulator circuit is determined through numerical computation The experiment is given in support of the simulation. 展开更多
关键词 phase array antennas impedance inatching simulation optimum design active circuits
下载PDF
True Time Delay Scheme for X-band Phased Array Radar
7
作者 LI Zheng 《Semiconductor Photonics and Technology》 CAS 2007年第1期53-57,共5页
The system of a true-time delay line for X-band and 8-unit phased array antennas is introduced. Changing the length of a chirp grating with piezotranslator(PZT), the variable delay is obtained. The scheme is applied t... The system of a true-time delay line for X-band and 8-unit phased array antennas is introduced. Changing the length of a chirp grating with piezotranslator(PZT), the variable delay is obtained. The scheme is applied to X-band phased array radar whose searching data rate is 56/s. It is simulated that the beam squinting is influenced by the error of real time delay. The relation between the beamforming mode and its modifying volt is discussed. 展开更多
关键词 phased array antennas true-time delay chirped grating far-field pattern
下载PDF
Beam shaping with limited amplitude weight values for satellite active phased array antenna 被引量:1
8
作者 Zhao Hongmei Wang Huali +2 位作者 Jin Jun Mu Shanxiang Xie Zehui 《Engineering Sciences》 EI 2010年第2期62-66,共5页
To gain the tradeoff between lower sidelobe and higher power amplifiers efficiency,a transmitting beam shaping scheme with limited amplitude weight values for satellite active phased array antenna is presented. The sc... To gain the tradeoff between lower sidelobe and higher power amplifiers efficiency,a transmitting beam shaping scheme with limited amplitude weight values for satellite active phased array antenna is presented. The scheme is implemented by a dual coding genetic algorithm(GA). Phase and amplitude of array weight vectors for beam shaping are encoded by real coding and finite length binary coding,respectively,which,maintaining accuracy of results,reduces the amplitude dynamic range and improves the efficiency of power amplifiers. The presented algorithm,compared with complex-coded GA,increases the convergence rate due to the search space's decrease. In order to overcome the prematurity and obtain better global optimization or quasi-global optimization,a new dual coding GA based on "species diversity retention" strategy and adaptive crossover and mutation probability are presented. 展开更多
关键词 active phased array antenna beam shaping SIDELOBE power amplifie~ efficiency dual coding genetic algorithm
下载PDF
A Novel 28 GHz Phased Array Antenna for 5G Mobile Communications 被引量:1
9
作者 LI Yezhen REN Yongli +2 位作者 YANG Fan XU Shenheng ZHANG Jiannian 《ZTE Communications》 2020年第3期20-25,共6页
A novel phased array antenna consisting of 256 elements is presented and experimentally verified for 5G millimeter-wave wireless communications.The antenna integrated with a wave control circuit can perform real-time ... A novel phased array antenna consisting of 256 elements is presented and experimentally verified for 5G millimeter-wave wireless communications.The antenna integrated with a wave control circuit can perform real-time beam scanning by reconfiguring the phase of an antenna unit.The unit,designed at 28 GHz using a simple patch structure with one PIN diode,can be electronically controlled to generate 1 bit phase quantization.A prototype of the antenna is fabricated and measured to demonstrate the feasibility of this approach.The measurement results indicate that the antenna achieves high gain and fast beam-steering,with the scan beams within±60°range and the maximum gain up to 21.7 dBi.Furthermore,it is also tested for wireless video transmission.In ZTE Shanghai,the antenna was used for the 5G New Radio(NR)test.The error vector magnitude(EVM)is less than 3%and the adjacent channel leakage ratio(ACLR)less than−35 dBc,which can meet 5G system requirements.Compared with the conventional phased array antenna,the proposed phased array has the advantages of low power consumption,low cost and conformal geometry.Due to these characteristics,the antenna is promising for wide applications in 5G millimeter-wave communication systems. 展开更多
关键词 5G mobile communications millimeter wave phased array antenna
下载PDF
Particle simulations on propagation and resonance of lower hybrid wave launched by phased array antenna in linear devices
10
作者 Guanghui ZHU Qing LI +3 位作者 Xuan SUN Jianyuan XIAO Jiangshan ZHENG Hang LI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2022年第7期119-128,共10页
In this work, we performed first-principles electromagnetic-kinetic simulations to study a phased antenna array and its interaction with deuterium plasmas within the lower hybrid range of frequency. We first gave wave... In this work, we performed first-principles electromagnetic-kinetic simulations to study a phased antenna array and its interaction with deuterium plasmas within the lower hybrid range of frequency. We first gave wave accessibility and resonance results, which agree well with theoretical prediction. In addition, we further investigated the antenna power spectrum with different antenna phases in the presence of the plasma and compared it with that in a vacuum,which directly indicates wave coupling and plasma absorption. Furthermore, for the case with zero phasing difference, our simulation results show that, albeit the launch is away from the accessibility region, tunneling effect and mode conversion occurred, which enhanced coupling and absorption. Moreover, consistent interactions between the injected wave and the plasma concerning various antenna phase differences are shown. We presented the inchoate response of the plasma in terms of the launching directions. Our results could be favorable for the engineering design of wave heating experiments with a tunable phased antenna array in linear devices, such as simple magnetic mirrors or tandem mirrors. 展开更多
关键词 LHW phased array antenna TUNNELING mode conversion particle-in-cell simulation
下载PDF
A Novel Millimeter-Wave Channel Measurement Platform for 6G Intelligent Railway Scenarios 被引量:1
11
作者 Dan Fei Chen Chen +4 位作者 Peng Zheng Dongsheng Zhang Jingya Yang Haoran Chen Bo Ai 《China Communications》 SCIE CSCD 2022年第11期60-73,共14页
This paper presented a novel millimeterwave channel measurement platform for the 6G intelligent railway.This platform used phased array antenna with 64 elements and can support instant bandwidth up to 1 GHz.Combined w... This paper presented a novel millimeterwave channel measurement platform for the 6G intelligent railway.This platform used phased array antenna with 64 elements and can support instant bandwidth up to 1 GHz.Combined with improved multi-tone sounding signals,the platform can enhance dynamic measurement capability in high-speed railway scenarios.We performed calibration works about frequency flatness,frequency offset and proved platform reliability with channel emulator based closed-loop verification.We also carried out field trials in high-speed railway carriage scenarios.Based on measurement results,we extracted channel characteristic parameters of path loss,power delay profile and delay spread to further verify the field measurement performance of the platform. 展开更多
关键词 6G MILLIMETER-WAVE channel measurement phased array antenna high-speed railway
下载PDF
Reconfigurable Pattern Patch Antenna for Mid-Band 5G:A Review 被引量:1
12
作者 Siti Rahena Isa Muzammil Jusoh +7 位作者 Thennarasan Sabapathy Jamel Nebhen Muhammad Ramlee Kamarudin Mohamed Nasrun Osman Qammer Hussain Abbasi Hasliza A.Rahim Mohd Najib Mohd Yasin Ping Jack Soh 《Computers, Materials & Continua》 SCIE EI 2022年第2期2699-2725,共27页
New requirements in communication technologies make it imperative to rehash conventional features such as reconfigurable antennas to adapt with the future adaptability advancements.This paper presents a comprehensive ... New requirements in communication technologies make it imperative to rehash conventional features such as reconfigurable antennas to adapt with the future adaptability advancements.This paper presents a comprehensive review of reconfigurable antennas,specifically in terms of radiation patterns for adaptation in the upcoming Fifth Generation(5G)New Radio frequency bands.They represent the key of antenna technology for materializing a high rate transmission,increased spectral and energy efficiency,reduced interference,and improved the beam steering and beam shaping,thereby land a great promise for planar antennas to boost the mid-band 5G.This review begins with an overview of the underlying principals in reconfiguring radiation patterns,followed by the presentations of the implemented innovative antenna topologies to suit particular advanced features.The various adaptation techniques of radiation pattern reconfigurable planar antennas and the understanding of its antenna design approaches has been investigated for its radiation pattern enhancement.A variety of design configurations have also been critically studied for their compatibilities to be operated in the midband communication systems.The review provides new insights on pattern reconfigurable antenna where such antennas are categorized as beam steering antenna and beamshaping antennas where the operation modes and purposes are clearly investigated.The review also revealed that for mid-band 5G communication,the commonly used electronic switching such as PIN diodes have sufficient isolation loss to provide the required beam performance. 展开更多
关键词 5G mid-band pattern antenna reconfigurable antenna phased array antenna antenna and propagation
下载PDF
Material Equivalent Test Based on Dimensional Analysis for Fragment Penetrating Antenna Target 被引量:1
13
作者 刘锋 石全 陈材 《Journal of Donghua University(English Edition)》 EI CAS 2016年第2期206-209,共4页
Phased array radar is the main sensor in a battlefield.Phased array antenna is the main execution unit of the phased array radar,and it greatly affects the reliability of the phased array radar. As a result,the fragme... Phased array radar is the main sensor in a battlefield.Phased array antenna is the main execution unit of the phased array radar,and it greatly affects the reliability of the phased array radar. As a result,the fragment damaged antenna test is important.As the materials of phased array antenna are not easy to get,the fragment damaged antenna test is difficult to carry out. Then we present a study on this problem and introduce the principles of dimensional analysis to solve it. Firstly, the fragments damage antenna target dimensionless model is constructed. Secondly,the finite element analysis software ANSYS / LS-DYNA are used to carry out a large number of different materials simulation test for dimensional analysis. Finally,based on dimensional test analysis,the materials equivalent empirical model between different antennas target is presented in the same damage. The results of this study provide a feasible and valuable solution for different materials' target damaged test. 展开更多
关键词 FRAGMENTS phased array antenna dimensional analysis material equivalent
下载PDF
Directional Modulation Based on a Quantum Genetic Algorithm for a Multiple-Reflection Model 被引量:1
14
作者 Yuwei Huang Xiubo Chen +2 位作者 Kaiguo Yuan Jianyi Zhang Biao Liu 《Computers, Materials & Continua》 SCIE EI 2020年第9期1771-1783,共13页
Directional modulation is one of the hot topics in data security researches.To fulfill the requirements of communication security in wireless environment with multiple paths,this study takes into account the factors o... Directional modulation is one of the hot topics in data security researches.To fulfill the requirements of communication security in wireless environment with multiple paths,this study takes into account the factors of reflections and antenna radiation pattern for directional modulation.Unlike other previous works,a novel multiple-reflection model,which is more realistic and complex than simplified two-ray reflection models,is proposed based on two reflectors.Another focus is a quantum genetic algorithm applied to optimize antenna excitation in a phased directional modulation antenna array.The quantum approach has strengths in convergence speed and the globe searching ability for the complicated model with the large-size antenna array and multiple paths.From this,a phased directional modulation transmission system can be optimized as regards communication safety and improve performance based on the constraint of the pattern of the antenna array.Our work can spur applications of the quantum evolutionary algorithm in directional modulation technology,which is also studied. 展开更多
关键词 Directional modulation quantum genetic algorithm phased antenna array multiple reflection
下载PDF
Ka-Band CTDRSS Terminal Technology for Meeting the Needs of Launch Vehicle TT&C
15
作者 LIAO Yanjie SONG Rui +2 位作者 GONG Changhui ZHANG Siyan ZHOU Lin 《Aerospace China》 2021年第2期35-41,共7页
To meet the application requirements for a Ka-band space-based TT&C terminal for a launch vehicle,this paper proposes the implementation scheme of a space-based TT&C terminal,analyzes and solves the miniaturiz... To meet the application requirements for a Ka-band space-based TT&C terminal for a launch vehicle,this paper proposes the implementation scheme of a space-based TT&C terminal,analyzes and solves the miniaturized design of equipment and the key technology for high-efficiency heat dissipation.The phased array antenna test shows that without external heat dissipation measures,the phased array antenna can work for a long time to meet the working requirements of launch vehicle,which has been verified in the LM-8 mission,and has wide engineering application prospects. 展开更多
关键词 CTDRSS relay terminal phased array antenna high density integration phase change heat storage technology
下载PDF
Analysis of airborne antenna using a FEM-UTD hybrid method
16
作者 WANG Meng ZHANG Yu LIANG Chang-hong 《Frontiers of Electrical and Electronic Engineering in China》 CSCD 2006年第2期244-247,共4页
In this paper,the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction(UTD)method for analyzing phased array antenna mounted on an airborne platform.First,... In this paper,the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction(UTD)method for analyzing phased array antenna mounted on an airborne platform.First,HFSS,a set of software based on finite element method(FEM),was utilized to find the near-field vector components of the phased array antennas,and then these vector components were used as the source of the UTD method to get the disturbed radiation pattern.Numerical results show that the hybrid of the two methods not only extends the use of the UTD program,but also effectively solves this type of challenging problems. 展开更多
关键词 FEM UTD Airborne phased array antenna pattern
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部