Results 81 to 90 of about 1,254 (122)

Analytical Design Method and Implementation of Broadband 4 × 4 Nolen Matrix

IEEE Transactions on Microwave Theory and Techniques, 2022
Beamforming techniques are widely used in antenna array systems. One of the most popular beamforming networks (BFNs) is Nolen matrix, which can achieve flexible phase progression. However, due to the lack of analysis on phase slope alignments between internal components, the conventional topology-based Nolen matrix exhibits narrow bandwidth.
Ye Yang, Yu Fei Pan, Shao Yong Zheng, Wonbin Hong, Wing Shing Chan   +4 more
openaire   +4 more sources

A Novel Planar Nolen Matrix Phased Array for MIMO Applications

2019 IEEE International Symposium on Phased Array System & Technology (PAST), 2019
In this paper, a novel Nolen matrix phased array for MIMO applications is presented. The proposed $4\times 4$ Nolen feeding network consists of six couplers and eight phase shifters in a triangular lattice. Each coupler represents a node in the lattice, and each phase shifter connects two adjacent couplers.
Han Ren, Hanxiang Zhang, Peizhao Li, Yixin Gu, Bayaner Arigong   +4 more
openaire   +3 more sources

Design of 3×3 Nolen Matrix With Integrated Filter Function

Microwave and Optical Technology Letters
ABSTRACT This letter proposes a novel approach for designing a 3×3 Nolen matrix with integrated filter function. The proposed Nolen matrix is realized by utilizing the combination of two 90° couplers, a compensation filter, and a 180° filtering coupler, providing phase increments of −90°, 30°, and 150° at the output ports.
Qiang Shao, Yi Lu, Rui‐Sen Chen, Guan‐Long Huang, Fu‐Chang Chen, Yi Wang, Xian‐Hui He, Mustafa K. Taher Al‐Nuaimi   +7 more
openaire   +3 more sources

A Wideband 3 x 3 Nolen Matrix With Flat Phase Differences

2021 Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC), 2021
Ye Yang, Y. F. Pan, W. S. Chan, Z. X. Yang, S. Y. Zheng   +4 more
openaire   +3 more sources

A Novel 3 × 3 Nolen Matrix Based on Trans-directional Coupled Lines

2021 Photonics & Electromagnetics Research Symposium (PIERS), 2021
Zhongbao Wang, Chengze Li, Peng Han, Hongmei Liu, Shaojun Fang   +4 more
openaire   +3 more sources

A tunable 3×5 Nolen matrix for sidelobe-reduced and beamforming applications

AEU - International Journal of Electronics and Communications
Tian-Gui Huang, Fu-Chang Chen, Jia-Zuo Cao, Kai-Ran Xiang, Yun Wang   +4 more
openaire   +3 more sources

Beamforming networks using the Nolen matrix for 5G applications

Waves in Random and Complex Media, 2023
A design of a wideband low loss 3 × 3 Nolen matrix is presented at 3.5 GHz. The proposed Nolen matrix is designed with the implementation of three branch-line couplers and two phase shifters. The interdigital capacitor unit cell is implemented in both the coupler and phase shifter to reduce the size and improve the bandwidth.
Hussam Keriee, Mohamad Kamal A. Rahim, Osman Ayop, Nawres Abbas Nayyef   +3 more
openaire   +2 more sources

Design of Extended Nolen Matrix With Enhanced Beam Controllability and Widened Spatial Coverage

IEEE Transactions on Circuits and Systems II: Express Briefs
Haiwen Liu, Xinyi Gu, Hongliang Tian
openaire   +3 more sources

Full 3D Coverage Beamforming Phased Array with Reduced Phase Shifters and Control 2D Tunable 3 × 3 Nolen Matrix

2022 IEEE International Symposium on Phased Array Systems & Technology (PAST), 2022
Hanxiang Zhang, Bayaner Arigong
openaire   +3 more sources

Design and Analysis of Planar 3 × 3 Nolen Matrix for Beamforming Applications

2024 IEEE Wireless Antenna and Microwave Symposium (WAMS)
Akkala Sowmya, Bharath Kunooru, Vahini N Srujana, D. Ramakrishna   +3 more
openaire   +3 more sources