Junping Geng

Efficient Pattern Synthesis of Separable Cylindrical Antenna Array Employing Alternating Fast Segmented Cyclic Convolution and FFT

Jianpeng Sun, Sihao Liu, Deqiang Yang, Junping Geng et autres

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Quad-Port 2D Wide-Angle Scanning Phase Mode Antenna

Minrui Zou, Junping Geng, Jinke Shi, Heci Liu et autres

This paper introduces a broadband four-port fullspace two-dimensional scanning phase-mode antenna based on spoof surface plasmon polaritons (SSPPs) structures. By leveraging folded multi-branch SSPPs radiators and multi-port feeding with phase-mode excitation techniques, the proposed design achieves flexible and precise full-space beam scanning. …

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Harmonic Equalizer for Decoupling Communication Bandwidth From Modulation Frequency in Time-Modulated Arrays

Tong Wu, Jingfeng Chen, Xianling Liang, Junping Geng et autres

In this letter, a harmonic equalizer to mitigate aliasing-induced inter-harmonic interference in time-modulated arrays (TMAs) is proposed, which conventionally restricts the usable communication bandwidth. By prepending a pilot signal spanning integer modulation period to the communication signal at the transmitter, the harmonic …

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Phased Array Calibration Based on Fast Rotating-Element Harmonic Electric-Field Vector

Shiyuan Li, Kebin Liu, Y. H. Xie, Chi Zhang et autres

Calibration is essential to ensure the optimal performance of phased arrays, as amplitude and phase mismatches degrade radiation characteristics. While amplitude-only calibration methods are attractive when direct phase measurements are infeasible, traditional techniques often suffer from high measurement overhead. This article proposes …

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An All-Metal High-Efficiency Wide-Angle Scanning Phased Array Based on Dual-Port PMA

Xudong Tang, Jianzhong Chai, Han Dong Zhou, Xuepeng Li et autres

In this paper, an all-metal high-efficiency dual-port phase mode antenna (PMA) is proposed. By adjusting the phase difference between the two ports in the PMA, distinct characteristic modes are excited, enabling a continuous transition of the radiation pattern from a conical beam …

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A Scannable Directional Modulation Secure Communication Method With Time-Modulated Array

Shuanghong Ge, Xiaonan Zhao, Junping Geng, Jingfeng Chen et autres

This paper presents a scannable directional modulation secure communication method based on a single-sideband time-modulated array. By optimizing the modulation parameters that generate equivalent amplitude-phase weighting for each antenna element in the radio frequency channel, the main beam of the first-order harmonic …

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Multiconstraint Evolutionary Algorithm Based on Decomposition for the Synthesis of Concentric Ring Sparse Array

Zeyang Jin, Ronghong Jin, Junping Geng, Yuxuan Zhao et autres

For the local convergence phenomenon in the multiobjective evolutionary algorithm based on decomposition (MOEA/D) when applied to multiconstraint sparse array optimization, a multiconstraint evolutionary algorithm based on decomposition (MCEA/D) is proposed in this communication. Unlike MOEA/D, which constructs subproblems through weighted aggregation …

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A Single-Channel FMCW Radar Based on 1-bit Time-Modulated Array

Xinyu Li, Jingfeng Chen, Xianling Liang, Junping Geng et autres

In this paper, a single-channel frequency-modulated continuous-wave (FMCW) radar based on 1-bit time modulated array (TMA) is proposed. By utilizing the spectrum folding phenomenon introduced by harmonics de-chirping, the frequency spectrums of beat signals generated by different harmonics are distributed in independent …

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A Novel Dual-Port Phase Mode Antenna Based on Folded Fishbone Structure and Its Application in Wide-Angle Scanning Phased Array With Polarization Switching Ability

Haotian Li, Han Dong Zhou, Junping Geng, Rui Zhao et autres

In this paper, a novel dual-port phase mode antenna (PMA) based on folded fishbone structure is proposed and is applied in phased arrays to achieve wide-angle scanning with polarization switching ability. The PMA antenna mainly consists of a folded fishbone structure placed …

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A Novel Reconfigurable Leaky Wave Antenna With Beam Scanning Ability at Fixed Frequency

Xuepeng Li, Xiaonan Zhao, Han Dong Zhou, Junping Geng et autres

A reconfigurable leaky-wave antenna (RLWA) with a low-profile ground plane is proposed, utilizing mode-switchable units with multi-feed patches to enable fixed-frequency beam scanning. Each patch element is equipped with three feed lines on both left and right sides, with individual PIN diode …

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Single-Antenna Direction Finding With Harmonic Analysis Based on Phasor Beam-Steering Antenna

Shuangshuang Zhu, Ziheng Ding, Junping Geng, Ronghong Jin

A novel single-antenna azimuthal direction-finding (DF) method with harmonic analysis is proposed in this letter. Leveraging the Phasor Beam Steering (PBS) antenna's capability of reconfiguring both the amplitude and phase patterns, a one-to-one relationship between the incident angles and the amplitude ratio, …

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A Planar Quad-Port Phase Mode Antenna Based on Radial SSPPs Radiator and Its Arrays

Nian Chen, Jianzhong Chai, Han Dong Zhou, Junping Geng et autres

A planar quad-port phase mode antenna (PMA) based on radial spoof surface plasmon polaritons (SSPPs) radiator and two arrays of it are proposed with extended 3-D scanning and polarization controlling characteristics. The proposed quad-port PMA is composed of a tri-layer PCB with …

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