Results 21 to 30 of about 5,167,279 (311)

Synthesizing Wide-beam Array Patterns Using Phase-only Control and Trapezoidal Amplitudes for Satellite-based Internet Access

Journal of Telecommunications and Information Technology
Low Earth orbit satellite systems are capable of providing global Internet access due to their high downlink rate and low link budget. In such systems, wide beam array patterns are used to efficiently cover the required areas.
Zahraa Turki Hassan, Jafar Mohammed
doaj   +1 more source

By-example synthesis of structurally sound patterns [PDF]

ACM Transactions on Graphics, 2015
Several techniques exist to automatically synthesize a 2D image resembling an input exemplar texture. Most of the approaches optimize a new image so that the color neighborhoods in the output closely match those in the input, across all scales. In this paper we revisit by-example texture synthesis in the context of additive manufacturing.
Jérémie Dumas, An Lu, Sylvain Lefebvre 0001, Jun Wu 0005, Christian Dick   +4 more
openaire   +1 more source

Optimization of Three-Dimensional Multi-Shell Dielectric Lens Antennas to Radiate Multiple Shaped Beams for Cellular Radio Coverage

IEEE Access, 2019
In this paper, a multi-shell spherical dielectric lens antenna is synthesized to radiate multi-beams with optimum shaped patterns for radio coverage at millimeter wave (mmW) frequencies.
Hsi-Tseng Chou, Yi-Sheng Chang, Hao-Ju Huang, Zhi-Da Yan, Titipong Lertwiriyaprapa, Danai Torrungrueng   +5 more
doaj   +1 more source

Efficient Numerical Synthesis of Radiation Patterns Using Circuit Model for Substrate Integrated Waveguide Leaky Wave Antennas

IEEE Access
A novel approach is presented for synthesizing radiation patterns of substrate-integrated waveguide leaky wave antennas in two stages. In the first stage, the antenna is considered an equivalent rectangular waveguide with slots, and a comprehensive ...
Nasim Zahra, Farooq Mukhtar, Inam Elahi Rana, Mahrukh Khan   +3 more
doaj   +1 more source

Simple Matrix Equation (SME) Method for Pattern Synthesis of Conformal Antenna Array with Arbitrary Architecture

International Journal of Antennas and Propagation, 2023
A novel noniterative method for pattern synthesis of conformal antenna array is put forward. First, a new pattern function formula for general conformal antenna array is derived.
Jie Chen
doaj   +1 more source

Physics-Informed Deep Neural Network for Low Sidelobe Time-Modulated Antenna Array Synthesis With Harmonic Suppression

IEEE Access
This paper introduces an innovative approach utilizing a deep neural network (DNN) to optimize the modulation scheme for time-modulated antenna array (TMAA) to verify specific side lobe and maximum harmonics levels.
Tarek Sallam, Qun Wang, Ahmed M. Attiya
doaj   +1 more source

Pattern Compensation for Faulty Phased Array Antenna Based on Deep-Learning Technique

IEEE Open Journal of Antennas and Propagation
This study proposes an approach to compensate for pattern distortion in a phased array antenna caused by antenna element failures. The proposed approach utilizes a deep-learning network explicitly trained for a phased array antenna with damaged elements ...
Shu-Min Tsai, Ming-Tien Wu, Yu-Han Chen, Hong-Wei Yan, Ming-Lin Chuang   +4 more
doaj   +1 more source

Cuckoo search optimization for linear antenna arrays synthesis [PDF]

Serbian Journal of Electrical Engineering, 2013
A recently developed metaheuristic optimization algorithm, the Cuckoo search algorithm, is used in this paper for the synthesis of symmetric uniformly spaced linear microstrip antennas array.
Ahmed Haffane, Abdelhafid Hasni
doaj   +1 more source

Therapeutic Apheresis in Nigeria: A Multi‐Center Summary of Abstracts From the Inaugural Nigerian Society for Apheresis Scientific Meeting

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Therapeutic apheresis (TA) is an established treatment modality for hematologic, neurologic, and immunologic disorders, yet access remains severely limited in sub‐Saharan Africa. Donor apheresis, including platelet apheresis collection from healthy donors, represents an important complementary modality supporting blood product ...
Nosa Bazuaye, Chimezie Okwuonu, Evelyn Idam, Folasade Adelekan‐Popoola, Shakirat Gold‐Olufadi, Olufunto Olufela Kalejaiye, Abdullateef Ogala, Zinnah Aloziem, Blossom Amamchukwu, Patience Elimia, Mkpoikanabasi Obot‐Obot, Henry Mbakwe, Praises Maduagwuna, Olatunji Akinrodoye, Chiamaka Anyanwu, Benjamin Anyanwu, Adedamola Akinsiku, Oluwatoyin A. Akinsiku, Muzamil O. Hassan, Fatiu A. Arogundade, Olalekan E. Ojo, Homayemem Weli, Jesupelumi Adenihun, Aderemi Adelaja, Ebun Bamgboye, Olalekan Olatise, Ade E. Faponle, Ayoola Odeyemi, Michael Muoka, Stephen Asaolu, Qudrat Busari, Blessing Dawudu, Michael Naiyeju, Rasheed A. Balogun   +33 more
wiley   +1 more source

Research on Multibeam Pattern Synthesis of Time Modulated Array Based on Convex Optimization

International Journal of Antennas and Propagation, 2021
An efficient multibeam pattern synthesis method for time modulated array (TMA) is proposed in this paper. The aim of this method is to generate a beam pattern on the specified sideband of TMA. The pattern synthesis problem is divided into two stages.
Jiawen Hu, Xikuan Dong, Jing Tan, Yachao Jiang, Hailin Li   +4 more
doaj   +1 more source