Study of Folded Reflector Multibeam Antenna With Dielectric Rods as Primary Source

Nguyen, T. P.; Pichot, Ch.; Migliaccio, Claire; Menzel, Wolfgang

doi:10.1109/lawp.2009.2026298

Cited by 19 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To keep the feed horn diameter small (2.67 mm) and to adjust an optimal illumination of the upper reflector, a dielectric rod has been taken from the antenna described in [31]. Using this dielectric rod, its phase center is situated 2 mm above the reflector.…”

Section: B Lower Reflectormentioning

confidence: 99%

Reconfigurable Folded Reflectarray Antenna Based Upon Liquid Crystal Technology

Bildik

Dieter²,

Fritzsch

et al. 2015

IEEE Trans. Antennas Propagat.

201

View full text Add to dashboard Cite

A reconfigurable antenna based on the liquid crystal technology is presented in this paper. The antenna comprises a planar lower reflector with an incorporated feed at its center and a polarizing grid on top as an upper reflector. The lower reflector is utilized to collimate the beam and to twist the polarization. The polarizing grid selects the polarization for the transmission and reflects the orthogonally polarized waves toward the lower reflector. Combining reflector elements with a polarizing grid allows performing additional phase adjustment on the upper reflector for beam steering. Reconfigurability is maintained by the upper reflector, in which a liquid crystal mixture is used as a tunable substrate. The liquid crystal layer is tuned with a bias voltage configuration to obtain an appropriate phase adjustment for the beam steering. As a proof of concept, the beam steering capability of the antenna is demonstrated by steering the main beam to , 0 , and 6 at 78 GHz. The measured gain at 78 GHz is 25.1 dB. The proposed antenna configuration is a promising candidate for reconfigurable, high-gain, low-profile, and low-cost antennas.Index Terms-Beam steering, liquid crystals, microstrip antenna arrays, microwave antennas, millimeter wave technology, reflectarrays.

show abstract

Section: B Lower Reflectormentioning

confidence: 99%

Reconfigurable Folded Reflectarray Antenna Based Upon Liquid Crystal Technology

Bildik

Dieter²,

Fritzsch

et al. 2015

IEEE Trans. Antennas Propagat.

201

View full text Add to dashboard Cite

show abstract

“…Another solution for the beam misalignment problem is using antennas with simultaneous multiple beams [4]. Various multi-beam techniques are reported in the literature, and they can be divided into lens antennas [5][6][7] and planar antennas [8][9][10][11][12][13][14][15]. Lens antennas achieve multibeam functionality through placement of an array of individual antennas in the focal plane of a dielectric or metasurface lens.…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Millimeter-Wave 5G V2X Multi-Beam Dual-Polarized Windshield Antenna

Nasr

Sarabandi

2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

Design procedure and experimental validation for a millimeter-wave (MMW) vehicular antenna with simultaneous multi-beam, for 5G V2X application, is presented. The design overcomes the constraint for requiring both wide angular coverage and high gain through a compact multi-array design. Each array is designed to have a fixed beam direction and sufficient beamwidth so that the overall pattern guarantees simultaneous coverage in the elevation plane. The multi-array idea is a cost-effective technique compared to employing phase shifters and beam steering of a single array and avoids latency associated with beam steering. The proposed design is composed of three compact dual polarized patch arrays. Each array covers different elevation angles, and their beam maxima are chosen to be at 10 o , -20 o and -40 o with respect to the normal of the windshield. The antenna covers the entire 28 GHz 5G band which ranges from 26.5 GHz to 29.5 GHz. Each feeding network is designed to minimize beam scanning with frequency. Dual-polarized antenna arrays are implemented to provide polarization diversity. Antenna mounting behind the laminated windshield have been investigated and proven to have a negligible effect on the antenna matching and a minor effect on the radiation pattern.INDEX TERMS Antenna arrays, millimeter wave antenna, multi-beam antenna, vehicle-to-everything communication, and 5G antenna

show abstract

“…High-gain multi-beam antennas [1][2][3][4][5][6][7][8][9] can provide multiple concurrent yet independent beams covering wide angular ranges. They can increase spectrum efficiency and reduce co-channel interference.…”

Section: Introductionmentioning

confidence: 99%

A broadband circularly polarized multi‐beam folded transmitarray antenna

Chen

et al. 2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

The multi‐beam reflectarray and transmitarray (TA) antennas are new antennas that can have wide angular coverage. However, they are generally of large profiles. To address the issue, this article proposes a folded TA antenna of high gain and low profile that can produce circularly polarized (CP) multi‐beams. It consists of a main‐reflector, a TA, and a linearly polarized (LP) planar feeding array. It reflects an incident electromagnetic wave twice and converts polarization three times. It has a metasurface that carries out the broadband LP‐to‐CP conversion. A prototype is developed with a height of 1.8λ at 13 GHz. The experimental results show that the antenna can achieve a scanning range of ±10°, a peak gain of 22 dBi, and an aperture efficiency of 20.8%. It has a 3‐dB axial ratio bandwidth of 2.2 GHz (or 16.6%), covering 12.1–14.3 GHz. It features a low profile, high gain, low cost, and easy integration with communication systems (e.g., MIMO transceiver systems).

show abstract

Study of Folded Reflector Multibeam Antenna With Dielectric Rods as Primary Source

Cited by 19 publications

References 7 publications

Reconfigurable Folded Reflectarray Antenna Based Upon Liquid Crystal Technology

Reconfigurable Folded Reflectarray Antenna Based Upon Liquid Crystal Technology

A Low-Cost Millimeter-Wave 5G V2X Multi-Beam Dual-Polarized Windshield Antenna

A broadband circularly polarized multi‐beam folded transmitarray antenna

Contact Info

Product

Resources

About