60 GHz Ultrawideband Polarimetric MIMO Sensing for Wireless Multi-Gigabit and Radar

Ariza, Alexis Paolo García; Müller, Robert; Wollenschläger, Frank; Schulz, Alexander; Elkhouly, Mohamed; Sun, Yongli; Glisic, Srdjan; Trautwein, U.; Stephan, Ralf; Müller, Jens; Thomä, Reiner S.; Hein, M.

doi:10.1109/tap.2013.2243398

Cited by 32 publications

(7 citation statements)

References 23 publications

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“…The combination of multiple beams significantly improves the signal coverage. 6,7 The MIMO antenna provides multiple paths, increasing diversity. 8,9 Various methods are being proposed to generate multiple beams effectively using passive beam forming networks, such as buttler matrix and rotman lens configuration.…”

Section: Introductionmentioning

confidence: 99%

Multibeam digital metasurface reflectarray antenna for 5G millimeter wave applications

Bashir,

Singh,

Dubey

2023

Micro & Optical Tech Letters

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A phase‐graded multibeam high gain digital metasurface reflector array (DMSRA) antenna for 5G millimeter wave communication is proposed in this letter. The DMSRA unit‐cell element is composed of a dipole loaded with endstubs. The variation of load across the diploe manipulates the reflection phase response of the incoming electromagnetic wave. A discretized phase state of 0° and 180° is obtained for an optimized loaded dipole. The phase states mimic the binary meta bit‐0 and meta bit‐1. The metabits are distributed along the reflecting surface using a digital coding sequence to form multiple beams in the desired direction. A coding sequence of 010101… is employed to design a two‐dimensional phase‐graded metasurface to generate a four‐beam radiation pattern. The designed digital metasurface reflectarray antenna of dimensions is fabricated and measured to validate the performance. The DMSRA is excited by an antipodal Vivaldi antenna positioned at an optimized focal point of 28 mm. The measured results show a four‐beam radiation pattern obtained over the frequency range of 27.5–28.5 GHz along azimuthal and elevation planes, with a peak beam gain of 10.5 dBi at 28 GHz.

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Section: Introductionmentioning

confidence: 99%

Multibeam digital metasurface reflectarray antenna for 5G millimeter wave applications

Bashir,

Singh,

Dubey

2023

Micro & Optical Tech Letters

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Section: Introductionmentioning

confidence: 99%

“…The polarization has been utilized to facilitate polarimetric radar systems for accurate target detecting, measuring, and identification in complex surroundings by providing additional scattering information with multiple polarizations, which may lead to new opportunities in geographical characterization, meteorological sounding, and precise target recognition. [2][3][4] Traditionally, polarization optics are globally managed by cascading several optical polarization components, including DOI: 10.1002/lpor.202200479 polarizers and waveplates based on anisotropic materials. [5] However, such methods commonly suffer from bulky volume, which is not favored by cuttingedge miniaturized systems and integrated optics where compact polarization manipulations are required within limited space.…”

Section: Introductionmentioning

confidence: 99%

On‐Demand Dynamic Polarization Meta‐transformer

Chen

Zhao

et al. 2022

Laser & Photonics Reviews

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Polarization is one of the key characteristics of light; hence its versatile manipulation plays a pivotal role in wave‐matter interaction, communication, detection, etc. Although metasurfaces have emerged as a promising platform for polarization optics, most of them only support limited polarization controls even in reconfigurable fashion. Here, an on‐demand dynamic polarization meta‐transformer operating for full Poincaré sphere by means of an ultrathin transmissive time‐varying metasurface is proposed. By temporally and independently modulating co‐polarized transmission coefficients of the metasurface for a pair of orthogonal linearly polarized incidence, the effective transmission metasurface anisotropy can be modified to mimic the desired arbitrary birefringence, thus enacting the polarization transformation between incidence and transmission waves with arbitrary polarization states. Experiments have been conducted in the microwave region to verify the design theory. This study may provide a new architecture in polarization optics and may advance the applications in vectorial polarimetry imaging, polarimetry radars, and optical/wireless communications.

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“…High reliability and temperature stability completed by a wide freedom in design and the possible integration of low resistivity conductor paths made of gold or silver boosts their application as radio frequency (RF) devices [18][19][20][21] and for smart system integration [22][23][24]. The composite character of the fired ceramic allows the variation of functional properties, such as permittivity, thermal expansion, or insulation resistance [25,26].…”

Section: Introductionmentioning

confidence: 99%

Magnetron Sputtered AlN Layers on LTCC Multilayer and Silicon Substrates

et al. 2018

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This work compares the deposition of aluminum nitride by magnetron sputtering on silicon to multilayer ceramic substrates. The variation of sputter parameters in a wide range following a fractional factorial experimental design generates diverse crystallographic properties of the layers. Crystal growth, composition, and stress are distinguished because of substrate morphology and thermal conditions. The best c-axis orientation of aluminum nitride emerges on ceramic substrates at a heater temperature of 150 • C and sputter power of 400 W. Layers deposited on ceramic show stronger c-axis texture than those deposited on silicon due to higher surface temperature. The nucleation differs significantly dependent on the substrate. It is demonstrated that a ceramic substrate material with an adapted coefficient of thermal expansion to aluminum nitride allows reducing the layer stress considerably, independent on process temperature. Layers sputtered on silicon partly peeled off, while they adhere well on ceramic without crack formation. Direct deposition on ceramic enables thus the development of optimized layers, avoiding restrictions by stress compensating needs affecting functional properties.

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60 GHz Ultrawideband Polarimetric MIMO Sensing for Wireless Multi-Gigabit and Radar

Cited by 32 publications

References 23 publications

Multibeam digital metasurface reflectarray antenna for 5G millimeter wave applications

Multibeam digital metasurface reflectarray antenna for 5G millimeter wave applications

On‐Demand Dynamic Polarization Meta‐transformer

Magnetron Sputtered AlN Layers on LTCC Multilayer and Silicon Substrates

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