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4 × 4 RHCP Array Antenna Base on LTCC and Quartz Interposer

Progress in Electromagnetics research C 2024年 150卷 81-88页

作者： Wei, Hao Han, Wei Zhang, Naibo Shijiazhuang050051 China National Engineering Research Center of Communication Software and ASIC Design Shijiazhuang050051 China

This paper designs, simulates, fabricates, and measures a right hand circular polarization (RHCP) array antenna, which is based on a low temperature co-fired ceramic (LTCC) and quartz interposer. The proposed array antenna consists of 4 × 4 antenna cells, and axis ratio of the antenna element in array antenna can be optimized after array expansion. This RHCP antenna’s wide frequency band and good axial ratio band are obtained by the stacked patches. The thickness of the proposed antenna without fixed structure is about 1.7 mm, and it is realized by a LTCC substrate with 14 layers and a quartz interposer with the thickness of 0.254 mm. The measured results demonstrate that for the operated frequency band of 17.5 GHz ∼ 21.5 GHz, the VSWR of the proposed antenna is better than 1.7, the RHCP gain more than 15.5 dB, the axial ratio less than 3 dB, and the size of the proposed antenna without connectors is 29.6 mm × 29.6 mm × 1.7 mm. © 2024, Electromagnetics Academy. All rights reserved.

关键词： Microwave antennas

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Two Compact Hybrid Band-Pass Filters Using Eighth-Mode Substrate-Integrated Waveguide and Microstrip Resonators

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Progress in Electromagnetics research C 2025年 151卷 167-175页

作者： Tang, Luyao Han, Wei Wei, Hao Li, Yanbin The 54th Research Institute of China Electronics Technology Group Corporation China National Engineering Reasearch Center of Communication Software and Asic Design China

Two compact substrate-integrated waveguide (SIW) filters with hybrid coupling of eighth-mode substrate integrated waveg-uide (EMSIW) resonators and microstrip are proposed in this paper. Hybrid coupled filters were achieved by etching two half-wavelength microstrip resonators (BPF I) or two quarter-wavelength microstrip resonators (BPF II) on the top of traditional second-order EMSIW filters. The topology of the two filters was analyzed. Due to the cross coupling between resonator 1 and resonator 4, two transmission zeros were achieved outside the band of BPF I, which increased the selectivity of the filter. Due to the mixed electromagnetic coupling between resonator 2 and resonator 3, a transmission zero is realized in the stopband of BPF II. To confirm the validity of the two filter models, two filters were designed, produced, and measured. Based on the findings of the measurements, the central frequency of BPF I is recorded at 7.7 GHz, with a fractional bandwidth (FBW) of 18.2%. The insertion loss (IL) within the passband is minimal at 0.8 dB, and the size of the filter is only 8 mm * 4 mm (0.53λg *0.26λg). The filter exhibits enhanced out-of-band suppression due to the presence of two transmission zeros located at frequencies of 6.4 GHz and 10 GHz. The center frequency of BPF II is 19.5 GHz,; the FBW is 20.5%; the IL within the passband is only 0.49 dB; and the size of the filter is only 2 mm ∗ 2 mm (0.34λg *0.34λg). As a result of the mixed electromagnetic coupling effects, a transmission zero occurs at a frequency of 26.7 GHz. The simulation outcomes are consistent with the experimental findings. Compared with other reported SIW filters, the two filters introduced in this study exhibit favorable characteristics such as reduced insertion loss and compact dimensions. © 2025, Electromagnetics Academy. All rights reserved.

关键词： Bandpass filters

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Tiled Phased Array Antennas by 3D Hybrid Integration Technology 10

Tiled Phased Array Antennas by 3D Hybrid Integration Technol...

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10th International Conference on Systems and Informatics, ICSAI 2024

作者： Hao, Wei Wei, Han Naibo, Zhang Shijiazhuang050051 China National Engineering Research Center of Communication Software and ASIC Design Shijiazhuang050051 China

ISBN: (纸本)9798331510138

In order to decrease the weight and size of phased array antennas (PAA) with the performance of high reliability, the novel tiled PAA by three-dimensional (3D) hybrid integration technology was designed. The proposed PAA include 36-element antenna units in package (AiP) based on high temperature co-fired ceramic (HTCC) substrate, 36-channel ratio frequency (RF) transmit/receive (T/R) module, a beam-form networks using hybrid power dividers, a beam-form control circuit and other devices. The tiled integration of the PAA use the ceramic interposer with multilayer circuits, fuzz buttons and balls grid array(BGA), whose size and weight are less than 60 mm}× 60 mm× 18 mm and 134g, respectively. To improve the circular polarization of the AiP, a unit cell of every 4-element is designed by sequentially clockwise by 90 degree. Measured results demonstrate that, from 21GHz to 21.5GHz, the PAA's normal EIRP and G/T are better than 49dBm and -10dB/K, respectively. The scan angle of the beam form is more than ± 45°. The measured results achieve a good agreement with the simulated results. © 2024 IEEE.

关键词： Antenna phased arrays

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A High-Octave UWB LNA with a Positive Slope Gain by Using Current Reuse Technique 9

A High-Octave UWB LNA with a Positive Slope Gain by Using Cu...

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9th International Conference on Integrated Circuits and Microsystems, ICICM 2024

作者： Yang, Zhehui Yang, Geliang Wu, Di Liao, Chunlian National Engineering Research Center of Communication Software and Asic Desgin China CETC 54th Research Institute Shijiazhuang China

ISBN: (纸本)9798331509453

This paper presents a high-performance GaAs low-noise amplifier (LNA) designed for wideband applications spanning from 1 GHz to 9 GHz. The LNA exhibits consistent positive slope gain characteristics across a range of operating temperatures, including -40°C, +25°C, and +85°C. Measured gain values are stable within a robust 24 to 27.5 dB window. With an impressively low noise figure (NF) of no more than 1.4 dB, the amplifier maintains excellent signal integrity. Its output power at 1 dB compression point (OP1dB) exceeds 13.3 dBm, while the third-order intercept point (OIP3) is greater than 25.5 dBm, indicating strong linearity and dynamic range. The LNA demonstrates superior matching performance and operates with a quiescent current of 42 to 44 mA under a supply voltage of 5V. Notably, the compact chip footprint measures just 1.8 mm x 1.1 mm, making it ideal for space-constrained systems. © 2024 IEEE.

关键词： Ultra-wideband (UWB)

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A High-Octave UWB LNA with a Positive Slope Gain by Using Current Reuse Technique

A High-Octave UWB LNA with a Positive Slope Gain by Using Cu...

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International Conference on Integrated Circuits and Microsystems (ICICM)

作者： Zhehui Yang Geliang Yang Di Wu Chunlian Liao National Engineering Research Center of Communication Software and Asic Desgin CETC 54th Research Institute shijiazhuang China

ISBN: (数字)9798331509453

ISBN: (纸本)9798331520243

This paper presents a high-performance GaAs low-noise amplifier (LNA) designed for wideband applications spanning from 1 GHz to 9 GHz. The LNA exhibits consistent positive slope gain characteristics across a range of operating temperatures, including −40°C, +25°C, and +85°C. Measured gain values are stable within a robust 24 to 27.5 dB window. With an impressively low noise figure (NF) of no more than 1.4 dB, the amplifier maintains excellent signal integrity. Its output power at 1 dB compression point (OP1dB) exceeds 13.3 dBm, while the third-order intercept point (OIP3) is greater than 25.5 dBm, indicating strong linearity and dynamic range. The LNA demonstrates superior matching performance and operates with a quiescent current of 42 to 44 mA under a supply voltage of 5V. Notably, the compact chip footprint measures just 1.8 mm x 1.1 mm, making it ideal for space-constrained systems.

关键词： Temperature measurement Temperature distribution Low-noise amplifiers Semiconductor device measurement Current measurement Gain measurement Gain Wideband Signal integrity Power generation

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Tiled Phased Array Antennas by 3D Hybrid Integration Technology

Tiled Phased Array Antennas by 3D Hybrid Integration Technol...

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International Conference on Systems and Informatics (ICSAI)

作者： Wei Hao Han Wei Zhang Naibo The 54th Research institute of China Electronics Technology Group Corporation (CETC-54) Shijiazhuang China National Engineering Research Center of Communication Software and ASIC Design Shijiazhuang China

ISBN: (数字)9798331510138

ISBN: (纸本)9798331510145

In order to decrease the weight and size of phased array antennas (PAA) with the performance of high reliability, the novel tiled PAA by three-dimensional (3D) hybrid integration technology was designed. The proposed PAA include 36-element antenna units in package (AiP) based on high temperature co-fired ceramic (HTCC) substrate, 36-channel ratio frequency (RF) transmit/receive (T/R) module, a beam-form networks using hybrid power dividers, a beam-form control circuit and other devices. The tiled integration of the PAA use the ceramic interposer with multilayer circuits, fuzz buttons and balls grid array(BGA), whose size and weight are less than $\mathbf{60}\mathbf{mm}\times \mathbf{60}\mathbf{mm}\times \mathbf{18}\mathbf{mm}$ and 134g, respectively. To improve the circular polarization of the AiP, a unit cell of every 4-element is designed by sequentially clockwise by 90 degree. Measured results demonstrate that, from 21GHz to 21.5GHz, the PAA's normal EIRP and G/T are better than 49dBm and -10dB/K, respectively. The scan angle of the beam form is more than $\pm \mathbf{45}^{\circ}$ . The measured results achieve a good agreement with the simulated results.

关键词： Phased arrays Antenna measurements Wiring Three-dimensional displays Transmitting antennas Seals Nonhomogeneous media Ceramics Temperature control Antenna radiation patterns

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SFedXSL: Semi-Synchronous Federated Cross-Sharpness Learning for UAV Swarm 24

SFedXSL: Semi-Synchronous Federated Cross-Sharpness Learning...

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24th IEEE International Conference on communication Technology, ICCT 2024

作者： Zhao, Mingxiong Zhao, Shihao Feng, Chenyuan Yang, Howard H. Quek, Tony Q. S. Yunnan University Engineering Research Center of Cyberspace National Pilot School of Software China Eurecom Department of Communication France Zhejiang University/University of Illinois Urbana-Champaign Institute Zhejiang University China Singapore University of Technology and Design Information Systems Technology and Design Pillar Singapore

ISBN: (纸本)9798350363760

Federated learning (FL) emerges as an innovative approach to manage a collection of client UAVs in order to co-train machine-learning models that are readily integrated into an Unmanned Aerial Vehicle (UAV) swarm. However, due to more erratic communication conditions than in terrestrial wireless networks, synchronous aggregation - which is utilized in traditional FL - is no longer feasible in UAV swarm. Additionally, because of the various deployment zones or specifications of UAVs, the data gathered by them are frequently heterogeneous. A significant amount of unlabeled data will be collected by the UAV swarm in light of its new flight trajectory and unseen scenarios. To address these issues, we propose a unique Semi-synchronous Federated Cross-Sharpness Learning (SFedXSL) framework to tackle the problems of semisynchronous devices and unlabeled data. This framework incorporates unsupervised pre-training and client UAV clustering scheduling. These proposed techniques aim to unlock the full potential of unlabeled and labeled user data, expediting the training process. Simulation results demonstrate that our proposed algorithm surpasses state-of-the-art FL techniques in terms of objection recognition accuracy and service latency. © 2024 IEEE.

关键词： Federated learning

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SFedXSL: Semi-Synchronous Federated Cross-Sharpness Learning for UAV Swarm

SFedXSL: Semi-Synchronous Federated Cross-Sharpness Learning...

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International Conference on communication Technology (ICCT)

作者： Mingxiong Zhao Shihao Zhao Chenyuan Feng Howard H. Yang Tony Q. S. Quek Engineering Research Center of Cyberspace National Pilot School of Software Yunnan University China Department of Communication EURECOM France Zhejiang University/University of Illinois Urbana-Champaign Institute Zhejiang University China Information Systems Technology and Design Pillar Singapore University of Technology and Design Singapore

ISBN: (数字)9798350363760

ISBN: (纸本)9798350363777

Federated learning (FL) emerges as an innovative approach to manage a collection of client UAVs in order to co-train machine-learning models that are readily integrated into an Unmanned Aerial Vehicle (UAV) swarm. However, due to more erratic communication conditions than in terrestrial wireless networks, synchronous aggregation—which is utilized in traditional FL—is no longer feasible in UAV swarm. Additionally, because of the various deployment zones or specifications of UAVs, the data gathered by them are frequently heterogeneous. A significant amount of unlabeled data will be collected by the UAV swarm in light of its new flight trajectory and unseen scenarios. To address these issues, we propose a unique Semi-synchronous Federated Cross-Sharpness Learning (SFedXSL) framework to tackle the problems of semisynchronous devices and unlabeled data. This framework incorporates unsupervised pre-training and client UAV clustering scheduling. These proposed techniques aim to unlock the full potential of unlabeled and labeled user data, expediting the training process. Simulation results demonstrate that our proposed algorithm surpasses state-of-the-art FL techniques in terms of objection recognition accuracy and service latency.

关键词： Training Accuracy Federated learning Simulation Wireless networks Semisupervised learning Autonomous aerial vehicles communications technology Trajectory Optimization

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Coordinated control method of virtually coupled train formation based on multi agent system 2nd

Coordinated control method of virtually coupled train format...

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2nd International Conference on Smart Vehicular Technology, Transportation, communication and Applications, VTCA 2018

作者： Liu, Ling Wang, Ping Zhang, Bo Wei, Wei School of Software and Microelectronics Peking University Beijing102600 China Beijing National Railway Research and Design Institute of Signal and Communication Group Co. Ltd. Beijing100070 China Beijing Engineering Technology Research Center of Operation Control Systems for High Speed Railways Beijing100070 China National Engineering Research Center for Software Engineering Peking University Beijing102600 China Key Laboratory of High Confidence Software Technologies Peking University Beijing102600 China

ISBN: (纸本)9783030045814

As China has become the country with the longest operating mileage and largest construction scale of high-speed railway (HSR) in the world, how to improve the operational excellence and customer satisfaction draws increasing attention. In order to further optimize the allocation of transport resource and improve the transportation efficiency of HSR, a coordinated control method using the idea of virtual coupling (VC) based on multi agent system (MAS) is proposed in this paper firstly. At last, the efficiency and feasibility of proposed model and method are demonstrated using a simulation case, which shows that the coordinated control model based on MAS can not only ensure the safety of operation, but also improve the efficiency of a whole train group. © Springer Nature Switzerland AG 2019.

关键词： Multi agent systems

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Intelligent Dispatching and Coordinated Control Method at Railway Stations for Virtually Coupled Train Sets*

Intelligent Dispatching and Coordinated Control Method at Ra...

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International Conference on Intelligent Transportation

作者： Ling LIU Ping WANG Wei WEI Qing LI Bo ZHANG School of Software and Microelectronics Peking University Beijing China National Engineering Research Center for Software Engineering Peking University School of Software and Microelectronics Peking University and Type of dynamic tracing point Beijing China Beijing National Railway Research & Design Institute of Signal &Communication Beijing China

ISBN: (纸本)9781538670255

Virtual coupling is a new train operation control mode, which can realize cooperative operation of multiple trains at extremely small intervals through wireless communication without physical connection. It significantly improves the section carrying capacity of the railway line. However, the transportation capacity of railway is more restricted by stations rather than sections. Efficient dispatching and coordinated control of virtually coupled train set (VCTS) at stations are crucial to improve railway transportation capacity. This study analysed the characteristics of trains' approaching and departing operations at railway stations. A novel concept was presented for station operation unlike the current method based on blocks and routes. It divided the train operation routes into segments, allowed the turnout to provide continuous locking for multiple trains, and enabled that the train set occupies each operation segment continuously in close formation. An intelligent dispatching and coordinated control method for VCTS was proposed. The effectiveness and applicability of the proposed method were further verified using the actual data of Nanjing South High-Speed Railway Station. The results showed that the proposed method can effectively reduce the train operation time interval and significantly improve station capacity.

关键词： Dispatching Rail transportation Network topology Topology Optimization Safety

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