Transmitarray Antenna for Conical Beam Scanning

Papathanasopoulos, Anastasios; Rahmat‐Samii, Y.

doi:10.1109/tap.2022.3191212

Cited by 5 publications

(2 citation statements)

References 35 publications

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“…Passive TAs, on the other hand, can only provide a fixed phase shift once their dimensions are determined. Nevertheless, the beams of the passive TAs can be mechanically steered by moving the feed source [12], [13], [14], [15], [16], [17], [18], [19], which causes a high gain roll-off issue. This occurs when the feed source veers from the center to scan the beams in a unifocal TA with an aperture designed for the center-located feed source.…”

Section: Introductionmentioning

confidence: 99%

An Optimized Ka-Band Low Profile Dual-Polarized Transmitarray Antenna With 2D Beam Switching

Tuloti,

Lamecki,

Mrozowski

2024

IEEE Access

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This article presents an optimized dual-polarized transmitarray antenna (TA) designed for MIMO applications at the Ka-band, capable of switching beams in two directions. The antenna aperture uses a small unit cell with three layers of Taconic RF-35 dielectric substrates, which can be easily fabricated using PCB technology. The unit cell achieved a 360-degree phase shift and a transmission magnitude exceeding -0.4 dB at 28 GHz. We used nine dual-polarized patch antennas in a cross shape, each with a 10.5 dBi gain at 28 GHz, to switch the beams in two directions without changing the feed location. We optimized the phase distribution in the TA aperture and adjusted the feed antenna's F/D and tilt to achieve a high-gain antenna with low-gain roll-off during beam switching. The fabricated TA exhibited excellent agreement with the full-wave simulation results. It achieved ±15 degrees and ±30 degrees beam tilts in the x-and y-directions, with less than 0.8 dB gain roll-off for both polarizations.INDEX TERMS Transmitarray antennas, 2D beam switching, low profile, dual-polarized, gain roll-off

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Section: Introductionmentioning

confidence: 99%

An Optimized Ka-Band Low Profile Dual-Polarized Transmitarray Antenna With 2D Beam Switching

Tuloti,

Lamecki,

Mrozowski

2024

IEEE Access

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show abstract

“…To achieve directional radiation, several techniques have been reported [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. e end-re directivity of a linear periodic array with N isotropic radiators can reach N 2 by decreasing spacing between elements, provided that the magnitudes and phases of the input excitations are properly chosen [2,4].…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Dual-Band Directional Antenna for Unmanned Aerial Vehicle Applications

Jin

Han

et al. 2022

International Journal of Antennas and Propagation

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A low-profile dual-band directional antenna operating at both 2.4 and 5 GHz for wireless local area networks (WLANs) for unmanned aerial vehicles (UAVs) applications is proposed in the paper. Two pairs of dipole antenna arrays with different electrical lengths are utilized to achieve dual-band directional radiation performance, which is desirable for a remote-control unit of the UAVs. Note that the directional radiation characteristic is obtained according to the double-dipole antennas driven by antiphase signals (W8JK), provided the distances between different dipole antennas are properly optimized. Note that the distance between the two longer dipoles, as well as the two shorter dipoles, can be calculated by equations. For each pair of dipoles with equal electrical lengths, an antiphase along the two dipoles can be obtained, and directional radiation characteristics can be achieved in the dual band. Coplanar strips (CPS) are employed as feeding networks, which lie on the same substrate layer as the antenna arrays, resulting in a low profile of merely 0.762 mm. Also, the overall size of the antenna together with the feeding network is 58.42 × 32.58 × 0.762 mm3. To verify the performance of the proposed antenna, a prototype is fabricated and measured. The measured gain is 5.2 and 7.0 dBi, respectively, in the 2.4 and 5.8 GHz bands. The measured reflection coefficients as well as radiation patterns are consistent with those of the simulated results. The proposed antenna scheme can be a good candidate for UAV applications with the advantages of a lower profile, dual-band characteristics, directional radiation characteristics, and a simple assembly. Since the remote-control unit operates at 2.4 GHz and 5.8 GHz to control the UAV unit, the low-profile dual-band directional radiation antenna has extensive application prospects when integrated into the space-limited unit.

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The Evolution of Printed Lens and Transmitarray Antennas: Navigating representative past, present, and future designs and manufacturing techniques

Rahmat-Samii,

Wang,

Papathanasopoulos

2024

IEEE Antennas Propag. Mag.

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Transmitarray Antenna for Conical Beam Scanning

Cited by 5 publications

References 35 publications

An Optimized Ka-Band Low Profile Dual-Polarized Transmitarray Antenna With 2D Beam Switching

An Optimized Ka-Band Low Profile Dual-Polarized Transmitarray Antenna With 2D Beam Switching

A Low-Profile Dual-Band Directional Antenna for Unmanned Aerial Vehicle Applications

The Evolution of Printed Lens and Transmitarray Antennas: Navigating representative past, present, and future designs and manufacturing techniques

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