Explanipedia

Coupling coordination degree pattern and influencing factors of digital economy and agricultural ecological resilience: Evidence from China Open

Yufei Wang, Zhengpeng Wang, Bo Xia, Zhenshuang Wang, Ning Zhao · 2025

The synergistic improvement of digital economy (DE) and agricultural ecosystem resilience (AER) was important for achieving sustainable agricultural development. This study analyzed the coupling coordination degree (CCD) between the DE and…

A Sidelobe-Reduced Wideband Flat-Gain Low-Profile Transmitarray Using a Simple Amplitude Control and Phase Error Compensation Open

Xiaonan Jiang, Wentao Xu, Steven Gao, Qingfeng Zhang, Zhengpeng Wang , et al. · 2025

Improved Mid-field Phased Array Calibration Method Based on Complex Interpolated Signals Open

Junhao Zheng, Zhengpeng Wang, Binhui Liu, Huaqiang Gao, Xiaoming Chen · 2024

In this brief paper, an improved method of separate amplitude and phase interpolations is presented for the mid-field phased array calibration system. Since the amplitude is relatively continuous and the phase suffers from phase wrapping, …

A reconfigurable transmitarray unit cell employing liquid metal Open

Zhishu Qu, Yihua Zhou, James R. Kelly, Zhengpeng Wang, Kenneth Lee Ford , et al. · 2024

In this paper, a reconfigurable transmitarray unit cell using liquid metal is presented. It consists of three conducting layers where the geometries of the resonators, on the different layers, differ and consist of an arrow shape together …

Deep Reinforcement Learning-aided Transmission Design for Energy-efficient Link Optimization in Vehicular Communications Open

Zhengpeng Wang, Yanqun Tang, Yingzhe Mao, Tao Wang, Xiunan Huang · 2024

This letter presents a deep reinforcement learning (DRL) approach for transmission design to optimize the energy efficiency in vehicle-to-vehicle (V2V) communication links. Considering the dynamic environment of vehicular communications, t…

Digital Self-Interference Canceler with Joint Channel Estimator for Simultaneous Transmit and Receive System Open

Shiyu Song, Yanqun Tang, Xianjie Lu, Yu Zhou, Xizhang Wei , et al. · 2024

Simultaneous transmit and receive wireless communications have been highlighted for their potential to double the spectral efficiency. However, it is necessary to mitigate self-interference (SI). Considering both the SI channel and remote …

Liquid Metal Reconfigurable Phased Array Antenna Open

Shaker Alkaraki, Quan Wei Lin, Fuad Erman, Syeda Fizzah Jilani, Zhengpeng Wang , et al. · 2024

A design for a phased array antenna using liquid metal (LM) technology is presented. The phased array antenna uses substrate integrated waveguides (SIW) feeding structure to excite a 1×4 printed dipole antenna array. The phase distribution…

Multiprobe-Enabled Over-the-Air Calibration of Millimeter-Wave Antenna Arrays: <i>Concepts and experimental validations</i> Open

Fengchun Zhang, Zhengpeng Wang, Tian Hong Loh, Yunsong Gui, Si Long Tang , et al. · 2024

Millimeter wave (mm-wave) antenna array systems with high-gain beam-steerable capability play a key role in fulfilling the high data-rate demands of the 5G and beyond wireless technologies. Rigorous array calibration is essential to ensure…

A Low-frequency Compact Lightweight Dual-polarization CATR Feed Antenna Open

Linhuan Zhu, Ning Dai, Linqian Jin, Zhengpeng Wang · 2024

To address the issue of a large axial distance for low-frequency feed antennas, this paper presents a low-frequency compact lightweight dual-polarization CATR feed antenna. This feed antenna consists of a near-rhombus-shaped crossed dipole…

A Low-Complexity Range Estimation with Adjusted Affine Frequency Division Multiplexing Waveform Open

Jiajun Zhu, Yanqun Tang, Xizhang Wei, Haoran Yin, Jinming Du , et al. · 2023

Affine frequency division multiplexing (AFDM) is a recently proposed communication waveform for time-varying channel scenarios. As a chirp-based multicarrier modulation technique it can not only satisfy the needs of multiple scenarios in f…

10-GHz Low-Loss Liquid Metal SIW Phase Shifter for Phased Array Antennas Open

Shaker Alkaraki, Quan Wei Lin, Alejandro L. Borja, Zhengpeng Wang, Hang Wong , et al. · 2023

This article presents a proof of concept demonstrator for a pair of novel phase shifters based on substrate integrated waveguide (SIW) technology. Gallium-based liquid metal (LM) is used to reconfigure each phase shifter. This article pres…

Digital Self-Interference Cancellation With Robust Multi-layered Total Least Mean Squares Adaptive Filters Open

Shiyu Song, Yanqun Tang, Xizhang Wei, Yu Zhou, Xianjie Lu , et al. · 2023

In simultaneous transmit and receive (STAR) wireless communications, digital self-interference (SI) cancellation is required before estimating the remote transmission (RT) channel. Considering the inherent connection between SI channel rec…

Combined Application of Partition Clustering Classification and Gerchberg-Papoulis Optimization Algorithm for Spherical Near Field Antenna Measurements Open

Fangyun Peng, Yuchen Ma, Yuxin Ren, Bo Liu, Xiaobo Liu , et al. · 2023

An adaptive sampling and optimized extrapolation scheme for spherical near-field antenna testing is proposed. The method relies on the partition clustering classification algorithm and Voronoi classification to divide a small amount of ini…

An Ultra-Wideband Plane Wave Generator for 5G Base Station Antenna Measurement Open

Xinzhong Li, Litao Chen, Zhengpeng Wang, Ke Yang, Jungang Miao · 2023

Plane-wave generators (PWGs) for over-the-air testing of 5G base stations offer the advantages of efficiency and economy. Many new bands, such as n28, are progressively being introduced, driving the bandwidth improvement of PWGs. The cost …

Phased Array Antenna Calibration Method Experimental Validation and Comparison Open

Chong Pan, Xinran Ba, Yuanhua Tang, Fengchun Zhang, Yusheng Zhang , et al. · 2023

This paper investigates the calibration methods appropriate to the phased array calibration in practical measurement setups. The rotating element electric field vector (REV) method, fast amplitude-only calibration method, and complex ampli…

An avalanche-and-surge robust ultrawide-bandgap heterojunction for power electronics Open

Feng Zhou, Hehe Gong, Ming Xiao, Yunwei Ma, Zhengpeng Wang , et al. · 2023

Source data of Figures in manuscript and the Supplementary Information have been included.

Phased Array Antenna System Enabled by Liquid Metal Phase Shifters Open

Shaker Alkaraki, Quan Wei Lin, James R. Kelly, Zhengpeng Wang, Hang Wong · 2023

This paper introduces a proof of concept design for the first phased array antenna design enabled by liquid metal (LM) technology. The proposed LM phased array antenna system is based on substrate integrated waveguides (SIW) to excite an 1…

A Reconfigurable Microstrip Patch Antenna With Switchable Liquid-Metal Ground Plane Open

Zhishu Qu, James R. Kelly, Zhengpeng Wang, Shaker Alkaraki, Yue Gao · 2022

This letter presents a novel reconfigurable microstrip patch antenna that is reconfigured using liquid metal. The proposed antenna employs two approaches in unison to switch the direction of the main beam. Specifically, the antenna uses th…

Fast Array Diagnosis for Subarray Structured 5G Base Station Antennas Open

Mengting Li, Fengchun Zhang, Zhengpeng Wang, Wei Fan · 2022

Antenna array composed of subarrays is a widely used array structure in the fifth-generation (5G) base stations (BSs), which can offer both high gain beam and beam-steering capability. Generally, subarray-structured BS antennas consist of …

A Novel Polarization and DOA Reliable Auto-Tracking Antenna System Open

Xinran Ba, Chen Xi Lin, Yincheng Zhong, Guanjiao Ren, Zhengpeng Wang , et al. · 2022

In this study, a novel compact auto-tracking antenna system was developed to ensure the high reliability of practical applications. The system consisted of three antennas (two anchor antennas and a tag antenna), three ultra-wide band (UWB)…

Reconfigurable Antenna Using Liquid Metal Vias Open

Shaker Alkaraki, James R. Kelly, Zhengpeng Wang · 2021

This paper presents a moderately high directivity (10 dBi) antenna having a reconfigurable radiation pattern. Specifically, the direction of the main beam can be altered. The radiation pattern control is achieved with the aid of a single-p…

Measurement Uncertainty of Antenna Efficiency Measured Using the Two-Antenna Method in a Reverberation Chamber Open

Wei Xue, Yuxin Ren, Xiaoming Chen, Zhengpeng Wang, Yingsong Li , et al. · 2021

With decades of development, the reverberation chamber (RC) has been proven to be a popular facility to determine antenna efficiency. One-, two- and three- antenna methods have been proposed to measure antenna efficiency without the need o…

On Angular Sampling Intervals for Reconstructing Wideband Channel Spatial Profiles in Directional Scanning Measurements Open

Wei Fan, Fengchun Zhang, Zhengpeng Wang, Ole Kiel Jensen, Gert Frølund Pedersen · 2020

Directional scanning measurement is the dominant
strategy taken to measure channel spatial profiles for millimeter
wave (mmWave) frequency bands. The focus of the
paper is on wideband channel spatial profile reconstruction
…

Design and Experimental Validation of Automated Millimeter-Wave phased Array Antenna-in-Package (AiP) Experimental Platform Open

Huaqiang Gao, Weimin Wang, Wei Fan, Fengchun Zhang, Zhengpeng Wang , et al. · 2020

Antenna-in-package (AiP) technology has been a main design scheme of millimeter-wave (mmWave) phased array antennas for 5G communications. The beamforming pattern of mmWave phased array AiP is steered by controlling the amplitude and phase…

Design and Implementation of a Wideband Dual-Polarized Plane Wave Generator With Tapered Feeding Nonuniform Array Open

Yusheng Zhang, Zhengpeng Wang, Xuelei Sun, Zhaolong Qiao, Wei Fan , et al. · 2020

This letter presents a sub-6 GHz cost-effective wideband dual-polarized plane wave generator (PWG) design for the fifth-generation (5G) base station over-the-air test. The proposed nonuniform PWG design is composed of 256 elements and has …

Achieving Wireless Cable Testing of High-Order MIMO Devices With a Novel Closed-Form Calibration Method Open

Fengchun Zhang, Wei Fan, Zhengpeng Wang · 2020

Highly integrated multiple-input-multiple-output (MIMO) system designs have posed great challenges to MIMO device performance testing in conventional cable conducted setups. A wireless cable method, which can achieve cable testing function…

On Uncertainty Investigation of mmWave Phased-Array Element Control With an All-On Method Open

Huaqiang Gao, Wei Fan, Weimin Wang, Fengchun Zhang, Zhengpeng Wang , et al. · 2020

Accurate control of complex excitation of array
elements is key to ensure spatial discrimination capability of
millimeter-wave (mmWave) phased array, e.g. beamforming to
target signal directions and nulling towards interference…

Low Scattering Plane Wave Generator Design Using a Novel Non-Coplanar Structure for Near-Field Over-the-Air Testing Open

Zhaolong Qiao, Zhengpeng Wang, Wei Fan, Xue Zhang, Steven Gao , et al. · 2020

Plane Wave Generator (PWG) has recently attracted great attention from industry and academia for over-the-air (OTA) testing of base station (BS) antennas in the fifth-generation (5G) wireless communication systems. This paper aims to reduc…

Robust Plane Wave Generator Design in Small Anechoic Chamber Setup Using Parameterized Field Method Open

Zheyi Yang, Zhengpeng Wang, Yusheng Zhang, Steven Gao · 2020

Plane Wave Generator (PWG) has attracted great research interest in the industry and academia for sub-6 GHz massive MIMO base station (BS) measurement, thanks to its low-cost and smaller system setup. One major concern in the small setup i…

Liquid Metal Bandwidth-Reconfigurable Antenna Open

Khaled Yahya Alqurashi, James R. Kelly, Zhengpeng Wang, Carol Crean, R. Mittra , et al. · 2019

This letter shows how slugs of liquid metal can be used to connect/disconnect large areas of metalization and achieve a radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwi…

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