Mm-Wave Beam Steering Antenna Based on Extended Hemispherical Lens Antenna Subarrays

Shila, Kiran A.; Mumcu, Gökhan

doi:10.1109/ieeeconf35879.2020.9330402

Cited by 4 publications

(1 citation statement)

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“…For example, beamforming networks such as butler matrices can perform beam steering with only switches, but at the expense of a large device footprint and by sacrificing the precision in the scan direction. Combinations of such switched beamforming concepts (butler matrices [15], [16] and lens antenna subarrays [17], [18]) with PSs have also been considered to reduce complexity, but usually at the expense of side lobe performance.…”

Section: Introductionmentioning

confidence: 99%

Mm-Wave Beam Steering Antenna Arrays Using Microfluidically Reconfigurable Beamforming Networks

Mendoza,

Mumcu

2023

IEEE J. Microw.

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A microfluidically reconfigurable beamforming network is introduced for beam steering mmwave antenna arrays. The beamforming network consists of a selectively metallized plate (SMP) that is encapsulated within a microfluidic channel in close proximity to multiple microstrip lines. Metallization traces of the SMP capacitively loads the microstrip lines to realize multiple slow-wave phase shifters. Varying the position of SMP over the lines creates variable phase shifts of the device. Strategically designing the SMP traces on each microstrip line leads to progressive phase shifting, resulting in operation with a single actuator. The manuscript presents a circuit model to facilitate the design of the beamforming network and presents experimental verification with a four-element antenna array operating at 28.5 GHz. The array exhibits continuous beam steering capability within ±30 • when its SMP is actuated within its 100 to +100 μm displacement range. The beam steering speed from −30 • to +30 • is 75 ms. The realized gain is 5.6 dBi at broadside and 6.8 dBi at 30 • scan angle corresponding to a radiation efficiency of 64% (including all losses in the system). The device is expected to handle 10 W of continuous RF power INDEX TERMS Beam steering, phased antenna array, microfluidics, beamforming network, phase shifter, millimeter wave.

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Section: Introductionmentioning

confidence: 99%

Mm-Wave Beam Steering Antenna Arrays Using Microfluidically Reconfigurable Beamforming Networks

Mendoza,

Mumcu

2023

IEEE J. Microw.

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A Millimeter-Wave 2D Beam Steering Antenna Using Extended Hemispherical Dielectric Lens Antenna Subarrays

Shila

Mumcu

2022

IEEE Access

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Recent work has proposed that millimeter-wave beam steering antennas consisting of lens antenna subarrays (LASs) reduce hardware complexity. This manuscript extends the concept to 2D beam steering with extended hemispherical dielectric lenses (EHDLs). To accomplish this, we introduce a design process to maximize scan range and side lobe level (SLL) performance. The design process first employs the solution of the geometric disk covering problem to identify the initial positions of the feed antennas such that the subarray size, M , is minimized. This process is followed by systematic 3D full-wave simulationbased parametric sweeps of lens geometry and feed antenna positions to maximize scan range and minimize SLL. Finally, we demonstrate this process with a 38 GHz antenna consisting of L = 7 LASs and M = 17 feed antennas per LAS. The resulting antenna has a ±36°field of view, -9.5 dB SLL, 5°half-power beamwidth, and ∼20 dBi maximum realized gain. Compared to the existing literature on subarray-based beam-steering antennas, this antenna performs with a more extensive scan range while offering a comparable SLL performance.

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Fully Metallic Gradient Index Lens Array Antenna for Wide-Angle Scanning Phased Array

Nie

Liu

et al. 2023

IEEE Trans. Antennas Propagat.

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Mm-Wave Beam Steering Antenna Based on Extended Hemispherical Lens Antenna Subarrays

Cited by 4 publications

References 5 publications

Mm-Wave Beam Steering Antenna Arrays Using Microfluidically Reconfigurable Beamforming Networks

Mm-Wave Beam Steering Antenna Arrays Using Microfluidically Reconfigurable Beamforming Networks

A Millimeter-Wave 2D Beam Steering Antenna Using Extended Hemispherical Dielectric Lens Antenna Subarrays

Fully Metallic Gradient Index Lens Array Antenna for Wide-Angle Scanning Phased Array

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