Yongjun Xie

Design of the reconfigurable Mmwave-metasurface based on liquid crystals

Xingcheng Zhou, Yongjun Xie, Chunyu Li, Xiaofei Yan et autres

Abstract Dynamically tunable metasurface, a new generation of electromagnetic manipulation devices, has shown significant application potential in millimeter-wave communication, intelligent sensing, phased array antennas, and other related domains. Nonetheless, the majority of current dynamically tunable metasurface continue to face significant hurdles regarding …

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Four-leaf-clover slot planar antenna based on all-metal back cavity structure

Yongkang Shi, Hao Liu, Yongjun Xie, Xiaonan Wu et autres

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On-demand high gain and directional surface wave antenna with 100° field of view based on grounded dielectric metasurface

Ke Pang, Yongjun Xie, Weikang Si, Pei‐Yu Wu et autres

We present a surface wave antenna based on a grounded dielectric metasurface-integrated Luneburg lens. This innovative design achieves a compact footprint, superior efficiency, and cost-effectiveness relative to traditional phased array antennas. The metasurface unit cells are optimized through an efficient approach to …

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Study on Fabrication and Optical Imaging Performance of Photosensitive Polyimide Hollow-Film Photon Sieves

Yuliang Dong, Yongjun Xie, Hua Liu

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High-Endfire-Gain Dielectric Image Line-Based Periodic Leaky-Wave Antenna With Planar Feeding

Ke Pang, Yongjun Xie, Pei Jia, Peiyu Wu

A high-endfire-gain periodic leaky-wave antenna (LWA) based on dielectric image line (DIL) and fed by a planar transition is proposed. The unit cell of the periodic DIL consists of two dielectric blocks with different permittivity, and space harmonics (SHs) are then generated. …

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Design of compact off-axis three-mirror freeform optical system with small F number

mo ning, Xianglong Mao, Jiadong Yu, Yuan Ying et autres

In the field of space optics, the compact freeform optical imaging system with small F number can realize the miniaturization and lightweight of the load, which is beneficial to enhance the ability of target recognition. In this paper, according to the vector …

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High Density Feed Network Arrangement for E-Band Dual-Polarized Antenna Array

Shaoqian Liu, Yan Zhang, Jinjing Zhao, Siyuan Liu et autres

This paper presents a wideband dual polarization feed network in E-band. By multiplexing substrate integrated coaxial line (SICL) into substrate integrated waveguide (SIW) and stripline, the function of dual-polarization feed under high density is realized. The whole feed network is fed using …

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Design of Dual-Polarization End-Fire Package Antenna for 6G Applications

Jianfeng Zhang, Shaoqian Liu, Jinjing Zhao, Fangyuan Wan et autres

In this paper, referring to the requirements of LTCC processing technology, two end-fire magnetoelectric dipoles with different polarizations were designed respectively, and combined to form the dual-polarized end-fire antenna unit. Results show that the dual-polarized end-fire antenna unit can achieve relative bandwidth …

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Optical freeform reflective imaging system design method with manufacturing constraints

Zhaohan Cai, Jinpeng Li, Jiadong Yu, Cheng Huang et autres

With the development of space optics, optical freeform surfaces have gradually been utilized in reflective optical imaging systems in recent years. Freeform surfaces not only bring many benefits to the optical imaging system, but also present many challenges to their manufacture. Regardless …

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Post Optical Freeform Compensation Technique for Machining Errors of Large-Aperture Primary Mirror

Cheng Huang, Jinpeng Li, Zhaohan Cai, Jiadong Yu et autres

Large-aperture space optical systems are important tools for observing our planet and conducting deep-space scientific research. More requirements have been put forward for large-aperture optical systems as the depth and breadth of related applications continue to increase. However, achieving the desired surface …

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Freeform surface compensation design for machining error of primary mirror

Cheng Huang, Yongjun Xie, Xianglong Mao

The Opto-Mechanical–Thermal Coupling Analysis and Verification of an All-Aluminum Freeform Imaging Telescope

Rong Gao, Jinpeng Li, Peng Wang, Jiadong Yu et autres

A freeform imaging telescope (FIT) can achieve a large field of view, high resolution, light weight, and small volume at the same time. Single-point diamond turning (SPDT) is usually used to fabricate FITs, which is made entirely of aluminum alloy. Compared with …

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