Article
Engineering, Electrical & Electronic
Yizhen Xu, Zilin Peng, Sichao Wen, Yuandan Dong
Summary: This paper presents a compact omnidirectional circularly polarized (OCP) linear antenna array with a planar configuration. By analyzing a shorted half mode patch antenna and introducing periodic structure changes, two naturally parallel arrays are obtained and integrated into a compact format to achieve OCP radiation. Experimental results verify the effectiveness of the design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Kam Eucharist Kedze, Heesu Wang, Ikmo Park
Summary: This study presents a metasurface-based circularly polarized microstrip patch antenna with high performance in terms of global bandwidth and gain. Through the interaction between the metasurface and the microstrip patch with crossed slot, the antenna achieves wide global bandwidth and stable broadside gain.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Lin-Xiao Wu, Ke Chen, Tian Jiang, Junming Zhao, Yijun Feng
Summary: This article proposes a cascaded metasurface (MS) with circular-polarization-selective properties that can achieve high reflection for left-handed circular polarization (LCP) and high transmission for right-handed circular polarization (RCP). By cascading two kinds of MS sheets, the MS conducts decoupled geometric phase modulations for the LCP reflection channel and RCP transmission channel. The practical applications of the proposed MS are demonstrated by designing a reconfigurable circularly polarized (CP) transmit-reflect-array antenna and a CP bidirectional antenna, both of which exhibit high-gain and high-purity LCP radiations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Huy Hung Tran, Khoa Nguyen-Dang, Niamat Hussain
Summary: This paper presents a single-layer design of non-uniform metasurface circularly polarized antenna with wideband operation characteristic. By placing the non-uniform metasurface in the same layer with the driven patch, it not only increases the impedance bandwidth, but also generates two additional circularly polarized bands in the high frequency band, significantly improving the antenna's performance.
CMC-COMPUTERS MATERIALS & CONTINUA
(2021)
Article
Crystallography
Tao Zhang, Haoran Wang, Chongmei Peng, Zhaohui Chen, Xiaoyi Wang
Summary: This paper presents the design and experimental verification of a linear polarization metasurface converter with arbitrary polarization rotating angle and stable oblique incident response. By changing the transmission line length of the metasurface unit cell, different polarization rotation angles can be achieved. The experimental results confirm that the proposed metasurface polarization converter has a high polarization conversion ratio under up to 50° oblique incident wave.
Article
Engineering, Electrical & Electronic
Jin Yang, Shang Tong Chen, Mao Chen, Jun Chen Ke, Ming Zheng Chen, Cheng Zhang, Rui Yang, Xin Li, Qiang Cheng, Tie Jun Cui
Summary: The proposed low-profile broadband planar circularly polarized folded transmitarray antenna demonstrates significant advantages including broad bandwidth, high gain, lower profile, planar geometry, and easy integration.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Tu Tuan Le, Yong-Deok Kim, Tae-Yeoul Yun
Summary: An all-textile broadband circularly polarized (CP) antenna assisted by a nonuniform metasurface (MS) is proposed for 5.8 GHz wireless body area networks. The antenna achieves a wide operating bandwidth and meets safety standards for wearable applications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hong-Gang Hao, Xuehong Ran, Yihao Tang, Sen Zheng, Wei Ruan
Summary: A transmissive single-layer Huygens unit cell based on induced magnetism is proposed for designing low-profile and multi-focus metasurface. The optimized full phase coverage and compensating phase distribution allow the incident plane wave to converge to designated points with outstanding manipulation capability. The designed metasurface shows good multi-focus focusing characteristics with high efficiency, indicating promising application prospects in various fields.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2021)
Article
Engineering, Electrical & Electronic
Cho Hilary Scott Nkimbeng, Heesu Wang, Gangil Byun, Yong Bae Park, Ikmo Park
Summary: This paper introduces a high-gain wideband circularly polarized antenna that combines an end-fire dipole array antenna with a metasurface. The antenna consists of a two-layer cascaded non-uniform metasurface comprising circular patches with cross-slots of unequal lengths above an end-fire dipole array antenna. The metasurface and cross-slots are used for polarization conversion. The measured results show good performance with high gain, wide bandwidth, and high radiation efficiency.
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Chang-Feng Liang, Yun-Peng Lyu, Dong Chen, Wanping Zhang, Chong-Hu Cheng
Summary: This article discusses the design and performance of a low-profile, wideband circularly polarized patch antenna, which achieves wideband property by utilizing TM11, TM21 modes, and orthogonal mode. The antenna demonstrates a 109% fractional bandwidth and 95% 3 dB axial ratio fractional bandwidth, with realized LHCP gain exceeding 3 dBic over a frequency range of 1.27 to 2.99 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Chemistry, Multidisciplinary
Touhidul Alam, Mohammad Tariqul Islam, Mohammad Lutful Hakim, Khalid H. Alharbi, Mandeep Singh Jit Singh, Muntasir M. Sheikh, Rabah W. Aldhaheri, Md. Shabiul Islam, Mohamed S. Soliman
Summary: The concept of nanosatellite technology is important for reducing cost and build time in earth and space observation research. The communication aspect of a satellite is crucial, and the antenna plays a key role in establishing a communication link between the nanosatellite and the earth. This paper proposes a compact metamaterial-based Ku-band antenna with circular polarization for nanosatellite communication, which has been tested and found suitable for integration with metallic and nonmetallic surfaces of miniature nanosatellites.
Article
Engineering, Electrical & Electronic
Deven G. Patanvariya, Anirban Chatterjee
Summary: This paper introduces a new technique for generating a difference pattern in a microstrip patch antenna array for monopulse applications. By utilizing a specific layout and a uniform power divider, the array is able to achieve lower sidelobe levels and stable radiation patterns. Experimental results demonstrate that the array has good gain and radiation efficiency.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Gaddam Ravindher Reddy, Nirupama Malavalli Prasad, Ajay Kumar Dwivedi, Vivek Singh, Nagesh Kallollu Narayanaswamy, Anand Sharma
Summary: A ceramic-based multiple input, multiple output (MIMO) radiator has been structured and investigated. The proposed antenna features a suspended metasurface that reduces |S-12| by -25 dB, alters linearly polarized waves into circularly ones, and includes the polarization diversity concept to improve isolation by more than 35 dB. Experimental verification confirms its working over the frequency range of 5.25-5.85 GHz, producing a 3-dB axial ratio from 5.3 GHz to 5.51 GHz, making it suitable for WLAN (5.4 GHz) applications.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Weihua Tan, Xiaoyong Shan, Zhongxiang Shen
Summary: This communication presents a low-profile ultrawideband circularly polarized antenna made of Rogers RT/Duroid 5880 PCB board, which demonstrates a wide 10 dB return loss bandwidth and is suitable for indoor positioning applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Huy Hung Tran, Cong Danh Bui, Nghia Nguyen-Trong, Truong Khang Nguyen
Summary: This paper introduces a low-profile circularly polarized antenna with wideband and polarization-reconfigurable characteristics, utilizing a non-uniform metasurface for performance enhancement. The antenna achieves an overlapped bandwidth between -10 dB impedance and 3-dB axial ratio of 25.6% with a peak broadside gain of 7.3 dBic.
Article
Physics, Applied
Yinuo Li, Juan Chen, Hongyu Shi, Jianxing Li
Summary: An ultra-thin transmitarray (TA) operating at 10 GHz, with a bandwidth of 1.15 GHz, is proposed in this study. The TA consists of two types of phase-shifting cells and has a thickness of only 2.8 mm (0.09 lambda (0)). It demonstrates a significant convergence effect for plane waves, enhancing the electric field intensity by 11.85 dB at the focus and transforming incident spherical waves into plane waves. When the TA is integrated with a substrate cylinder antenna, the peak gain increases by 8.8 dB to reach 17.8 dBi, while the half-power beamwidth reduces from 84 degrees to 11 degrees. Fabrication and measurement of the TA show a high consistency with the simulated results, validating its excellent performance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Yuchen He, Sihong Duan, Jianxing Li, Hui Chen, Yuan Yuan, Huaibin Zheng, Jianbin Liu, Yu Zhou, Zhuo Xu
Summary: Different from conventional imaging methods, ghost imaging (GI) tests the response of an object to different spatial spectrums, which has potential advantages. However, there are still challenges in the application of GI, such as the need for a high-modulation-rate, high-resolution, and low-cost light source. This study proposes a architecture called Speckle-Driving De-Artifact Nets (SDDAN) for GI, which effectively removes artifacts in reconstructed images and achieves higher peak signal-to-noise ratio compared to other methods.
OPTICS COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Xiao Ma, Shangyi Li, Zechuan Guan, Jianxing Li, Hao Sun, Yong Wang, Hui Guo
Summary: To address the challenges posed by the large space-time range and limited onboard resources, we propose a multilevel queue-based technique that uses latency requirements as an indicator for traffic scheduling in LEO satellite networks. Simulation results show that our method significantly improves network throughput, reduces packet loss ratio, and accommodates more time-sensitive flows with acceptable latency requirements.
Article
Physics, Multidisciplinary
Yanlei Yang, Chong Lv, Wei Sun, Xiaona Ban, Qiushi Liu, Zhigang Deng, Wei Qi, Guoqing Yang, Xiaohua Zhang, Feng Wan, Zhao Wang, Baozhen Zhao, Jianxing Li, Weimin Zhou
Summary: A novel scheme to enhance neutron yields by irradiating a multi-channel target with a relativistic femtosecond laser has been proposed. Particle-in-cell simulations show that the multi-channel target significantly enhances neutron yield compared to the plane target. The excited transverse sheath electric field in the channel accelerates D+ ions in the transverse direction, leading to more effective D-D fusion reactions and neutron production.
FRONTIERS IN PHYSICS
(2023)
Article
Oncology
Fangming Wang, Shuai Liu, Fei Liu, Tianli Xu, Jianlin Ma, Jing Liang, Jing Wang, Donghua Liu, Feiya Yang, Jianxing Li, Nianzeng Xing
Summary: The TIGIT monoclonal antibody vibostolimab enhances the antitumor effect of expanded NK cells against CRPC by enhancing cytotoxicity and cytokine production. This finding supports the translational application of TIGIT mAb and NK cell combination strategies for CRPC treatment.
Article
Physics, Fluids & Plasmas
Wen-Qing Wei, Jia-Lin Zhang, Xu-Lei Ge, Meng Liu, Bo-Yuan Li, Jian-Xing Li, Yong-Tao Zhao, Xiao-Hui Yuan
Summary: The competition and transition of dominant mechanisms for proton acceleration were investigated experimentally by tuning the preplasma density profile using an additional femtosecond pre-ablation laser beam. A transition from target normal sheath acceleration to relativistically induced transparency (RIT) domination was observed with increasing prepulse intensity. The experimental observations were qualitatively verified by two-dimensional particle-in-cell simulations, which showed that the proton component along the laser axis is mainly generated by RIT-induced breakout afterburner from a tailored pre-expanded ultrathin front-layer foil.
PHYSICS OF PLASMAS
(2023)
Article
Urology & Nephrology
Bo Xiao, Xiaolin Diao, Xue Zeng, Song Jin, Gang Zhang, Wenjie Bai, Jianxing Li
Summary: This study evaluated the efficacy and safety of needle-perc-assisted endoscopic surgery (NAES) in the treatment of staghorn renal stones. The results showed that NAES had less blood loss, shorter hospital stay, lower pain scores, and lower rates of severe complications compared to traditional methods. The postoperative recurrence rate was also better with NAES.
UROLOGIA INTERNATIONALIS
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyan Yu, Jianxing Li, Jianping Hu, Yuan Yao, Jianwu Li, Sen Yan
Summary: A dual-polarized antenna based on a substrate-integrated waveguide (SIW) horn antenna and Vivaldi antenna is proposed, achieving both horizontal and vertical polarization. A dielectric lens is designed for impedance matching and directivity enhancement. The measured results show a 20.04-25.5 GHz overlapped dual-polarized impedance bandwidth and the maximum gains of 5.2 dBi and 8.2 dBi for the HP and VP, respectively. With good isolation of 35 dB, this proposed antenna meets the demand for simultaneous transmission and reception of signals in two polarization directions for wireless communication.
APPLIED SCIENCES-BASEL
(2023)
Meeting Abstract
Urology & Nephrology
Yubao Liu, Jianxing Li
JOURNAL OF UROLOGY
(2023)
Article
Astronomy & Astrophysics
Qian Zhao, Yan-Xi Wu, Mamutjan Ababekri, Zhong-Peng Li, Liang Tang, Jian-Xing Li
Summary: The advent of laser-driven high-intensity gamma-photon beams has opened up new opportunities for designing advanced photon-photon colliders. In our recent work, we investigated the polarization characteristics of linear Breit-Wheeler pair production in circularly-polarized gamma-photon collisions. By using a new spin basis for positrons and electrons, we were able to decouple the transverse and longitudinal spin components, and found that the linear polarization of photon can induce highly angle-dependent pair yield and polarization distributions.
Article
Urology & Nephrology
Tianfu Ding, Bo Xiao, Xue Zeng, Lei Liang, Chaoyue Ji, Jianxing Li
Summary: The purpose of this study is to investigate the use of tubularized incised plate (TIP) urethroplasty for distal second-and third-degree hypospadias. The results show that using dysplastic corpus spongiosum and Buck's fascia to cover the new urethra reduces the incidence of urinary fistula but may increase the incidence of urethral stricture.
Article
Urology & Nephrology
Tianfu Ding, Xiao Bo, Zeng Xue, Liang Lei, Chaoyue Ji, Jianxing Li
Summary: The purpose of this study was to investigate the temperature changes around the fibres of the super pulse thulium fibre laser (SP-TFL) during in vitro lithotripsy. The results showed that without irrigation, the temperature rapidly reached the safety threshold of 43°C within 24 s. When the laser power was less than 15 W, 25 W, and 30 W, the irrigation rate should be maintained at more than 15 ml/min, 25 ml/min, and 35 ml/min, respectively.
Article
Engineering, Electrical & Electronic
Jianxing Li, Weiyu He, Kai-Da Xu, Juan Chen, Xiu Yin Zhang
Summary: This letter proposes a compact microstrip broadband filtering attenuator based on variable resistors with high-frequency selectivity. It can achieve tunable attenuation characteristics over a broad frequency band by changing the resistance of the variable resistors. The circuit structure is analyzed using odd- and even-mode methods. A fabricated prototype of the filtering attenuator operates from 1.3 to 2.8 GHz and realizes tunable attenuation from 3.26 to 15.61 dB. The results of theoretical calculations, simulations, and measurements agree well, validating the feasibility of the proposed design.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Urology & Nephrology
Xue Zeng, Bo Xiao, Weiguo Hu, Chunyu Liu, Haijie Xie, Linguo Xie, Wenzeng Yang, Feng An, Zhenyu Cui, Feng Zhu, Zhiguo Zhang, Jianbin Bi, Yining Li, Jianxing Li
Summary: The purpose of this study was to evaluate the efficacy and safety of a modified triangular double-J (DJ) stent in 1-2 cm renal or ureter calculi patients after retrograde intrarenal surgery (RIRS) through a randomized, controlled clinical study. The results showed that patients who received the modified triangular DJ stent had a higher stone-free rate but lower general health.
WORLD JOURNAL OF UROLOGY
(2023)
Article
Urology & Nephrology
Bo Xiao, Xue Zeng, Gang Zhang, Chaoyue Ji, Song Jin, Wenjie Bai, Yuzhe Tang, Bixiao Wang, Jianxing Li
Summary: The study aimed to assess the safety and efficacy of ultrasound-guided percutaneous nephrolithotomy (PCNL) for complex renal stones performed in a modified supine position. Results showed that successful renal access was achieved and the procedure was safe. However, the stone clearance rate was not ideal, indicating that the modified supine position may not be suitable for US-guided PCNL for complex renal stones.
UROLOGIA INTERNATIONALIS
(2023)
