检索结果-内蒙古大学图书馆

14th International Symposium on Antennas Propagation and EM Theory

作者： Chen, Yanna Chen, Qiang Ma, Yanli Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China

ISBN: (纸本)9798350353129;9798350353136

This paper introduces a 1-bit broadband digital metasurface unit based on the phase-change material(PCM) GeTe in the Ka-band. The metasurface unit achieves a stable phase shift of 180 degrees +/- 25 degrees within the frequency range of 27.87GHz to 41.99GHz, with a bandwidth of 14.12GHz and a relative bandwidth of 40.42%, exhibiting stable broadband characteristics and reflection losses below 0.45dB. A 15x15 array based on this metasurface unit is designed, and simulations demonstrate that the antenna can achieve a wide-angle scanning of +/- 50 degrees with excellent beam scanning performance, reaching a peak gain of 17.57dBi.

关键词： Ka-band Phase-Change Material(PCM) GeTe Broadband Metasurface Unit reconfigurable reflectarray

来源：评论

学校读者我要写书评

暂无评论

Ultrabroadband and Multipolarized Electrically reconfigurable reflectarray Antennas

引用

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2025年第2期73卷 723-732页

作者： Tian, Jie Li, Shiyuan He, Chong Premaratne, Malin Zhu, Weiren Zhou, Ji Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China Monash Univ Dept Elect & Comp Syst Engn Adv Comp & Simulat Lab AxL Clayton Vic 3800 Australia Tsinghua Univ Sch Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China

In this article a general strategy for designingultrabroadband and multipolarized electrically reconfigurablereflectarray antennas (RRAs) is proposed. The realization ofultrabroadband reconfigurable 1-bit phases and nearly uniformreflection magnitudes results from applying the mirror-symmetryprinciple and subwavelength mechanism, respectively. Numericalsimulations reveal that the proposed element operates withinan impressive bandwidth spanning of 6.7-10.6 GHz, boastinga fractional bandwidth of 45.1% and featuring a stable 1-bitphase manipulation and reflection loss of <= 1.0 dB throughoutthis frequency range. To validate the approach experimentally,an RRA array consisting of 16x16 elements has been designed,fabricated, and measured for dynamic beam scanning. Themeasurements confirm a robust beam manipulation bandwidthextending from 7.0 to 11.0 GHz, encompassing a fractionalbandwidth of 44.4% for wide-angle beam steering capability ofup to 60 degrees. Moreover, the ability to control circularly polarized(CP) electromagnetic waves has also been validated throughtheory deduction and simulation, demonstrating manipulationbandwidths ranging from 7.0 to 10.5 GHz. This study offers freshinsights into the design of ultrabroadband and multipolarizedelectrically RRAs and holds vast potential for diverse applica-tions in the next-generation high-speed wireless communicationsystems.

关键词： Electrically mirror-symmetry multipolarized reconfigurable reflectarray ultrabroadband Electrically mirror-symmetry multipolarized reconfigurable reflectarray ultrabroadband

来源：评论

学校读者我要写书评

暂无评论

A Simplified, Double-Layer and Low-Profile 1-Bit reconfigurable reflectarray for 2-D Space-Time Beam Steering

引用

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2024年第2期23卷 658-662页

作者： Li, Guanxuan Han, Jiaqi Ma, Xiangjin Wang, Xin Liu, Haixia Li, Long Xidian Univ Sch Elect Engn Key Lab High Speed Circuit Design & EMC Minist Educ Xian 710071 Peoples R China

This letter presents a simplified, double-layer, and low-profile 1-bit reconfigurable reflectarray (RRA). To keep the 1-bit performance of the element on a single substrate, the point with the numerically weakest electric field is selected as the location of the biasing point without using additional radio frequency choke components. An L-shaped slot is cut in the ground plane to guide the biasing line, and square slots are cut to reserve enough area to route the lines of each element. A 12 x 12 RRA prototype is fabricated and tested to validate its 2-D space-time beam-steering capability. For spatial beams, the experimental results indicate a 2-D beam scanning of +/- 50 degrees and a maximum aperture efficiency of 15.7%. For spatiotemporal beams, we propose and verify a space-time coding strategy in case of phase delay introduced by the horn feed. The thickness of RRA is only 1.524 mm (1/40 lambda at 5.0 GHz). The proposed design can be a low-cost candidate for supporting RRA applications.

关键词： Reflection PIN photodiodes Encoding Beam steering Harmonic analysis Apertures Manganese 2-D beam steering double-layer low-profile reconfigurable reflectarray space-time coding

来源：评论

学校读者我要写书评

暂无评论

Single Motor-Controlled Mechanically reconfigurable reflectarray

引用

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2023年第1期71卷 190-199页

作者： Cao, Zhongyao Li, Yue Zhang, Zhijun Iskander, Magdy F. Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China Tsinghua Univ Beijing Natl Res Ctr Informat Sci & Technol Beijing 100084 Peoples R China Univ Hawaii Manoa Hawaii Ctr Adv Commun Honolulu HI 96822 USA

In this article, a mechanically reconfigurable 1-D reflectarray actuated by a single motor is proposed. The elements are designed as metal tubes that are lifted by the ejectors. To achieve continuous phase growth in a limited space, the discontinuity of the Archimedean spiral is utilized. Then, a novel drive mechanism is constructed to transfer the power of the motor to each element. The combination of the Archimedean spiral cam and the follower effectively converts the rotation of the shafts to the linear motion of the element. In conjunction with the timing pulleys and timing belts, the Archimedean spiral cams generate a periodic changing phase gradient over time. The whole structure is supported by low-cost acrylic plates with fasteners. The main parts are composed of standard components and the overall structure is easy to realize. The reflectarray at normal incidence offers a beam steering range from -60 degrees to 60 degrees in one dimension at 5 GHz. The beam coverage test demonstrates a maximum improvement in the received signal level of 16 dB in the multipath environment. This work provides a new solution to the design of mechanically reconfigurable reflectarrays.

关键词： Spirals Fasteners Timing Shafts Repeaters Pulleys Electron tubes Archimedean spiral cam drive mechanism reconfigurable reflectarray timing belts timing pulleys

来源：评论

学校读者我要写书评

暂无评论

One-bit wideband reconfigurable reflectarray with stable beam-scanning gain for X-band application

引用

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2023年第8期65卷 2323-2330页

作者： Zheng, Kailang Xu, Kuiwen Chen, Shichang Zhou, Tao Pan, Xiao-Min Zhang, Changming Yu, Xianbin Hangzhou Dianzi Univ Engn Res Ctr Smart Microsensors & Microsyst Hangzhou Peoples R China Beijing Inst Technol Sch Integrated Circuit & Elect Beijing Peoples R China Zhejiang Lab Hangzhou Peoples R China Hangzhou Dianzi Univ Engn Res Ctr Smart Microsensors & Microsyst Hangzhou 310018 Peoples R China

A wideband and electrically reconfigurable reflectarray (RRA) is presented for X-band application. The unit cell is composed of two heterogeneous resonators, that is, a split resonator ring and a metallic patch, and two positive-intrinsic-negative (PIN) diodes integrated between these two resonators. A bias circuit on the bottom layer is designed to achieve the switching of the two states via properly placing the PIN diodes on the resonators with minimal electric field. One-bit phase quantization is obtained by switching two different resonant mode via controlling the ON or OFF state of two PIN diodes. The simulated results show that the proposed unit cell can achieve one-bit phase quantization with 180 degrees +/- 20 degrees and reflection coefficients of -1 dB from 9.5 to 10.8 GHz, corresponding relative bandwidth of 12.81%. In addition, a fully functional 12 x 12 RRA fed by a linearly polarized horn is theoretically designed, simulated, and fabricated. The measured results show that the main beam can be steered from -50 degrees to +50 degrees at operating frequency, for example, 10.1 GHz with 1.5 dB gain loss within the scanning range and 20.34% aperture efficiency. In addition, the measured average gain is about 17.5 dBi and 3 dB gain bandwidth is about 15.68% from 9.4 to 11 GHz. In virtue of wide bandwidth, stable radiation gain, and good beam scanning capability, the proposed RRA is promising for future wireless communication and radar.

关键词： antenna beam scanning PIN diode reconfigurable reflectarray

来源：评论

学校读者我要写书评

暂无评论

A 1-Bit All-Metal Wide-Angle and Multipolarization Beam-Scanning reconfigurable reflectarray Antenna

引用

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2023年第5期22卷 1015-1019页

作者： Wang, Min Mo, Yuxin Xie, Wenqing Hu, Nan Chen, Zhengchuan Tian, Zhong Chongqing Univ Posts & Telecommun Sch Optoelect Engn Chongqing 400065 Peoples R China Southeast Univ State Key Lab Millimeter Waves Nanjing 210096 Jiangsu Peoples R China A INFO Inc Beijing 100084 Peoples R China Chongqing Univ Sch Microelect & Commun Engn Chongqing 400044 Peoples R China

In this letter, a 1-bit wide-angle and multipolarization beam-scanning reconfigurable reflectarray antenna (RRA) is designed, fabricated, and measured. The proposed RRA element consists of a square base, a circular turntable, and three butterfly staircases with different heights based on three-dimensional all-metal structure. The 1-bit reflected phase and orthogonal linear polarization reconfigurability can be achieved by rotating the proposed RRA element. Then, an all-metal RRA prototype with 26 x 26 rotational elements are fabricated, which is fed by an x-polarized corrugated horn with 20 degrees inclination. The multipolarization scanning beams are generated by dynamically rotating individual element on the aperture. The measured results show that the RRA prototype can achieve a 60 degrees beam scanning with maximum scan loss of 3.3 dB in x-polarization, gamma-polarization, and circular polarization at 10.0 GHz. The peak gains of 27.2, 26.7, and 27.1 dBi with aperture efficiency of 24.7%, 22.0%, and 24.2% are obtained where the 1 dB gain bandwidth is 24.0%, 14%, and 18% for x-polarization, gamma-polarization, and left-handed circular polarization (LHCP), respectively. The proposed RRA greatly reduces the cost, complexity, and RF loss.

关键词： All-metal beam-scanning low-cost multipolarization reconfigurable reflectarray rotational element

来源：评论

学校读者我要写书评

暂无评论

Dual-Polarized reconfigurable reflectarray Using Vanadium Dioxide for 5G mmWave Communication

Dual-Polarized Reconfigurable Reflectarray Using Vanadium Di...

引用

2025 International Workshop on Antenna Technology

作者： Disharoon, Walter Dasari, Sree Adinarayana Williamson, Thomas G. Kovitz, Joshua Ghalichechian, Nima Georgia Inst Technol Elect & Comp Engn Atlanta GA 30332 USA Georgia Tech Res Inst Sensors & Elect Appl Lab Atlanta GA USA Georgia Tech Res Inst Adv Concepts Lab Atlanta GA USA

ISBN: (纸本)9798331527372;9798331527365

A vanadium dioxide (VO2) reconfigurable reflectarray was designed and simulated for operation between 28-32 GHz. VO2 is an insulator-metal-transition phase-change material that exhibits a sharp, reversible conductivity change at 68 degrees C. The design is dual-polarized to support LP, dual-LP, or dual-CP applications. The simulated reflection loss is less than 1 dB over the entire band. The phase difference is 180 +/- 20 degrees between 28-33 GHz. The simulated realized gain of the finite array peaks at 22.9 dBi, which corresponds to an aperture efficiency of 29%. The 3-dB Gain bandwidth covers 27.7-33.2 GHz, which is an 18% bandwidth. Ongoing fabrication and measurement results will be presented at the conference.

关键词： Vanadium dioxide phase-change material reconfigurable reflectarray dual-pol dual-polarized mmWave

来源：评论

学校读者我要写书评

暂无评论

A Varactor-Based and Dual-Polarized reconfigurable reflectarray with 2-Bit Phase Resolution 13

A Varactor-Based and Dual-Polarized Reconfigurable Reflectar...

引用

13th International Electrical Engineering Congress, iEECON 2025

作者： Sangmahamad, Pubet Pechrkool, Tanaporn Sangpet, Patchadaporn Pirajnanchai, Virote Janpugdee, Panuwat Zhao, Yan Rajamangala University of Technology Thanyaburi Department of Electronics and Telecommunication Engineering Pathum Thani Thailand Chulalongkorn University Department of Electrical Engineering Bangkok Thailand Chulalongkorn University International School of Engineering Bangkok Thailand

ISBN: (纸本)9798331543952

A varactor-based 2-bit dual linear-polarized reconfigurable reflectarray (RRA) is presented, featuring a unit cell with a cross-shaped structure on the top layer and a ground plane on the bottom layer. Each unit cell includes two orthogonally arranged varactors, independently biased via bias vias to generate different reflection phase shifts. Four distinct phase states are used to achieve a 2-bit phase resolution. A 16 × 16 unit cell RRA is designed and analyzed, showing that it can achieve ±60º beam steering for both linear polarizations. The maximum gain is 16.65 dBi at broadside, with cross-polarization levels below -14 dB. As the beam scans away from broadside, the gain decreases approximately as cos(θ). Compared to a 1-bit configuration, the proposed 2-bit RRA shows improved performance in gain, sidelobe levels, and beam direction accuracy. © 2025 IEEE.

关键词： 2-bit Phase Resolution Radiation Beam Control reconfigurable reflectarray Varactor

来源：评论

学校读者我要写书评

暂无评论

A Wideband 1-Bit reconfigurable reflectarray Antenna at Ku-Band

引用

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2022年第3期21卷 566-570页

作者： Zhou, Shi-Guo Zhao, Gang Xu, He Luo, Chuan-Wei Sun, Ji-Qiu Chen, Guan-Tao Jiao, Yong-Chang Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian 710071 Peoples R China

In this letter, a wideband high-efficiency 1-bit 16 x 16 reconfigurable reflectarray antenna (RRA) is proposed. First, a wideband and low loss 1-bit RRA element is designed. It consists of double-layer patches printed on two dielectric substrates, respectively, forming a multiresonant behavior to expand the *** to the relatively thin thickness of the double-layer dielectric substrate (0.05 lambda(0)), the element has low reflection loss. Therefore, the high efficiency and wide bandwidth performances can be obtained simultaneously. The phase difference between the two states of the RRA element is stable within 180 +/- 20 degrees in the frequency range of 12.9-16.5 GHz. Based on the broadband RRA element, a 16 x 16 RRA was fabricated and measured. Tested results show that the proposed RRA achieves 22.5% of 1 dB gain bandwidth and 25% of maximum aperture efficiency.

关键词： PIN photodiodes Pins Manganese Broadband antennas Feeds Wideband Dielectric substrates Beam scanning high efficiency p-i-n diode reconfigurable reflectarray wideband

来源：评论

学校读者我要写书评

暂无评论

A 2-Bit reconfigurable reflectarray Unit Design Using Only 2 PIN Diodes

A 2-Bit Reconfigurable Reflectarray Unit Design Using Only 2...

引用

IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)

作者： Liu, Luohao Yang, Fan Xu, Shenheng Li, Maokun Tsinghua Univ Dept Elect Engn Beijing Peoples R China

ISBN: (纸本)9781665478342

This paper proposes a 2-bit reconfigurable reflectarray (RRA) unit design using only two PIN diodes. A 2-bit phase resolution can be achieved by controlling the on/off state of the diodes respectively. The operation principal is presented, and a unit is designed at 5.8 GHz (5.6 similar to 6GHz), with an average reflection loss of around 1dB.

关键词： reconfigurable reflectarray 2-bit phase-shift circuit pin diodes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：