Miniaturized 1D beam switching and 2D printed Yagi‐Uda antenna arrays

2021 ◽  
Author(s):  
Nivedita Parthasarathy ◽  
Brian Tjahjadi ◽  
Ramesh Abhari
Keyword(s):  
Antenna Arrays ◽  
Beam Switching

scholarly journals Low-Power Beam-Switching Technique for Power-Efficient Collaborative IoT Edge Devices

2021 ◽  
Vol 11 (4) ◽  
pp. 1608
Author(s):  
Semyoung Oh ◽  
Daejin Park
Keyword(s):  
Energy Consumption ◽  
Antenna Arrays ◽  
Optimization Problem ◽  
Signal To Noise Ratio ◽  
Optimal Combination ◽  
Wireless Sensor ◽  
Greedy Search ◽  
Signal To Noise ◽  
Power Efficient ◽  
Beam Switching

Collaborative beamforming (CB) enables uplink transmission in a wireless sensor network (WSN) composed of sensors (nodes) and far-away access points (APs). It can also be applied to the case where the sensors are equipped with beam-switching structures (BSSs). However, as the antenna arrays of the BSSs are randomly headed due to the irregular mounting surface, some sensors form beams that do not illuminate a desired AP and waste their limited energy. Therefore, to resolve this problem, it is required to switch the beams toward the desired AP. While an exhaustive search can provide the globally optimal combination, a greedy search (GS) is utilized to solve this optimization problem efficiently. Simulation and experimental results verify that under certain conditions the proposed algorithm can drive the sensors to switch their beams properly and increase the received signal-to-noise ratio (SNR) significantly with low computational complexity and energy consumption.

Leaky-wave Antenna Arrays for Flexible Dual-beam Switching

2021 ◽  
pp. 1-1
Author(s):  
Xiaowen Li ◽  
Junhong Wang ◽  
Zheng Li ◽  
Yujian Li ◽  
Meie Chen ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Dual Beam ◽  
Beam Switching

scholarly journals Low-Cost Beamforming Concept for the Control of Radiation Patterns of Antenna Arrays Installed onto UAVs

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4265
Author(s):  
Leonardo C. dos Santos ◽  
Edson R. Schlosser ◽  
Marcos V. T. Heckler
Keyword(s):  
Antenna Arrays ◽  
Low Cost ◽  
Antenna Gain ◽  
Electromagnetic Modeling ◽  
Radiation Patterns ◽  
Complete Structure ◽  
Swarm Optimization ◽  
Ground Station ◽  
Integrated Antennas ◽  
Beam Switching

This paper presents a low-cost architecture that allows for beamforming with antenna arrays installed onto unmanned aerial vehicles (UAVs). Beam switching is proposed to improve the antenna gain towards the ground station with two three-element arrays installed below the wings of the UAV. The electromagnetic modeling of the complete structure (UAV and integrated antennas) was performed with commercial electromagnetic simulator Ansys HFSS. The radiation patterns were synthesized with particle swarm optimization (PSO). By employing lumped surface-mount device (SMD) components and switches, the design of the feeder to deliver proper excitation coefficients to the antennas is presented, and its performance was assessed by simulations. The proposed approach is demonstrated to be very effective with low-cost production.

Specific Features Pertinent to the Use of Planar Antenna Arrays with Central Symmetry in Interference Cancellers

Vestnik MEI ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 123-128
Author(s):  
Pavel S. Gribov ◽  
◽  
Maria A. Gribova ◽  
Aleksandr Yu. Shatilov ◽  
◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Central Symmetry ◽  
Planar Antenna

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays

2011 ◽  
Vol 57 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Mariusz Zamłyński ◽  
Piotr Słobodzian
Keyword(s):  
Antenna Arrays ◽  
Mutual Coupling ◽  
Planar Antenna ◽  
Sidelobe Level ◽  
Edge Diffraction ◽  
Narrow Angle ◽  
Compensation Technique ◽  
Diffraction Effects ◽  
Linear Antenna Arrays

Influence of the Aperture Edge Diffraction Effects on the Mutual Coupling Compensation Technique in Small Planar Antenna Arrays In this paper the quality of a technique to compensate for mutual coupling (and other phenomena) in small linear antenna arrays is investigated. The technique consists in calculation of a coupling matrix, which is than used to determine corrected antenna array excitation coefficients. Although the technique is known for more than 20 years, there is still very little information about how different phenomena existing in a real antenna arrays influence its performance. In this paper two models of antenna arrays are used. In the first model the effect of mutual coupling is separated from the aperture edge diffraction. In the second model antenna both mutual coupling and aperture edge diffraction effects are included. It is shown that mutual coupling itself can be compensated very well and an ultralow sidelobe level (i.e. -50 dB) could be achieved in practice. In the presence of diffraction effects -46.3 dB sidelobe level has been attained, but radiation pattern can be controled only in narrow angle range (i.e. up to ±60°).

A Beam Switching Planar Yagi-patch Array for Automotive Applications

PIERS Online ◽  
2010 ◽  
Vol 6 (4) ◽  
pp. 350-354 ◽  
Author(s):  
Shao-En Hsu ◽  
Wen-Jiao Liao ◽  
Wei-Han Lee ◽  
Shih-Hsiung Chang
Keyword(s):  
Automotive Applications ◽  
Beam Switching
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