A 900 MHz Beam Steering Parasitic Antenna Array for Wearable Wireless Applications

2013 ◽  
Vol 61 (9) ◽  
pp. 4520-4527 ◽  
Author(s):  
Md. Rashidul Islam ◽  
Mohammod Ali
Keyword(s):  
Antenna Array ◽  
Beam Steering ◽  
Wireless Applications

scholarly journals A Miniaturized Butler Matrix Based Switched Beamforming Antenna System in a Two-Layer Hybrid Stackup Substrate for 5G Applications

Electronics ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 1232 ◽  
Author(s):  
Soyeon Kim ◽  
Seongjo Yoon ◽  
Yongho Lee ◽  
Hyunchol Shin
Keyword(s):  
Antenna Array ◽  
Return Loss ◽  
Lower Layer ◽  
Beam Steering ◽  
System Size ◽  
Antenna System ◽  
Wireless Applications ◽  
Butler Matrix ◽  
Antenna Performance ◽  
Circuit Components

This work presents a Butler matrix based four-directional switched beamforming antenna system realized in a two-layer hybrid stackup substrate for 28-GHz mm-Wave 5G wireless applications. The hybrid stackup substrate is composed of two layers with different electrical and thermal properties. It is formed by attaching two layers by using prepreg, in which the circuit components are placed in both outer planes and the ground layers are placed in the middle. The upper layer that is used as antenna substrate has εr = 2.17, tanδ = 0.0009 and h = 0.254 mm. The lower layer that is used as a Butler matrix substrate has εr = 6.15, tanδ = 0.0028 and h = 0.254 mm. By realizing the antenna array on the lower-εr layer while the Butler matrix on the higher-εr layer, the Butler matrix dimension is significantly reduced without sacrificing the array antenna performance, leading to significant overall antenna system size reduction. The two-layer substrate approach also significantly suppresses parasitic radiation leaking from the Butler matrix toward the antenna side, allowing overall radiation pattern improvement. The fabricated beamforming antenna is composed of 1 × 4 patch antenna array and a 4 × 4 Butler matrix. The measured return loss is lower than −8 dB at all ports in 28-GHz. It demonstrates the switched beam steering toward four distinct angles of—16°, +36°, −39°, and +7°, with the sidelobe levels of −12, −11.7, −6, and −13.8 dB, respectively. Antenna gain is found to be about 10 dBi. Due to the two-layer hybrid stackup substrate, the total antenna system is realized only in 1.7λ × 2.1λ, which shows the smallest form factor compared to similar other works.

scholarly journals A NOVEL OF RECONFIGURABLE PLANAR ANTENNA ARRAY (RPAA) WITH BEAM STEERING CONTROL

2010 ◽  
Vol 20 ◽  
pp. 125-146 ◽  
Author(s):  
Mohd Tarmizi Ali ◽  
Mohd Nor Md Tan ◽  
Tharek bin Abd Rahman ◽  
Muhammad Ramlee Bin Kamarudin ◽  
Mohd Faizal Jamlos ◽  
...  
Keyword(s):  
Antenna Array ◽  
Beam Steering ◽  
Planar Antenna ◽  
Steering Control ◽  
Planar Antenna Array

scholarly journals BEAM STEERING ANTENNA ARRAY FOR 5G TELECOMMUNICATION SYSTEMS APPLICATIONS

2018 ◽  
Vol 67 ◽  
pp. 197-207 ◽  
Author(s):  
Mohamed Hadi Habaebi ◽  
Mohanad Janat ◽  
Md. Rafiqul Islam
Keyword(s):  
Antenna Array ◽  
Beam Steering ◽  
Telecommunication Systems
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