The Experts below are selected from a list of 44106 Experts worldwide ranked by ideXlab platform

Makoto Ando - One of the best experts on this subject based on the ideXlab platform.

  • Continuous Beam Steering Antenna with Large 2D Coverage for 5G Applications
    2017
    Co-Authors: Karim Tekkouk, Jiro Hirokawa, Makoto Ando, Ronan Sauleau
    Abstract:

    A gap waveguide Continuous Beam steering antenna is proposed in the 60-GHz band for 5G applications. The antenna is composed of two parts i) a quasi-TEM feeding network, ii) a slotted radiating plate. The relative mechanical rotation between the two parts generates a phase gradient across the radiating part and the Beam radiated in the upper hemisphere can be scanned Continuously. The antenna is developed in hollow waveguide with a contactless technology to ease the mechanical movement between the antenna parts. The proposed antenna has been validated numerically and experimentally in the 60-GHz band. Very good agreement has been obtained between simulations and measurements. The antenna field of view reaches +/- 60 degrees. and its bandwidth equals 13% for VSWR

  • wideband and large coverage Continuous Beam steering antenna in the 60 ghz band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to ±60°. The antenna bandwidth is up to 13% for VSWR <2. The loss within the antenna structure is estimated to be around 0.86 dB.

  • Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Junko Hirokawa, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to +/- 60 degrees. The antenna bandwidth is up to 13% for VSWR

Karim Tekkouk - One of the best experts on this subject based on the ideXlab platform.

  • Continuous Beam Steering Antenna with Large 2D Coverage for 5G Applications
    2017
    Co-Authors: Karim Tekkouk, Jiro Hirokawa, Makoto Ando, Ronan Sauleau
    Abstract:

    A gap waveguide Continuous Beam steering antenna is proposed in the 60-GHz band for 5G applications. The antenna is composed of two parts i) a quasi-TEM feeding network, ii) a slotted radiating plate. The relative mechanical rotation between the two parts generates a phase gradient across the radiating part and the Beam radiated in the upper hemisphere can be scanned Continuously. The antenna is developed in hollow waveguide with a contactless technology to ease the mechanical movement between the antenna parts. The proposed antenna has been validated numerically and experimentally in the 60-GHz band. Very good agreement has been obtained between simulations and measurements. The antenna field of view reaches +/- 60 degrees. and its bandwidth equals 13% for VSWR

  • wideband and large coverage Continuous Beam steering antenna in the 60 ghz band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to ±60°. The antenna bandwidth is up to 13% for VSWR <2. The loss within the antenna structure is estimated to be around 0.86 dB.

  • Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Junko Hirokawa, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to +/- 60 degrees. The antenna bandwidth is up to 13% for VSWR

Ronan Sauleau - One of the best experts on this subject based on the ideXlab platform.

  • Adaptive Continuous Beam steering in quasi-optical antenna solutions
    2018
    Co-Authors: M.r.d. Kodnoeih, Ronan Sauleau, R. Negrier, E.m. Cruz, Y. Letestu, Laurent Ferro-famil
    Abstract:

    This paper introduces a novel adaptive Continuous Beam steering (ACBS) solution for quasi-optical antenna technologies. The main advantages of this solution compared to disContinuous Beam switching approaches are small steering angle steps (high resolution), improved Beam crossing level and lower RF losses. This solution is based on a phase correcting aperture transfer function and the relation between a focal array amplitude tapering and its phase center displacement. The proposed solution is verified by comparing its calculated results with 3D full-wave simulations. Using a 2u2 focal source array illuminating a Fresnel dielectric lens, it is possible to achieve a scanning range of 1.6° with a steering angle step of 0.3° and a Beam crossing level of 0.2 dB. The ACBS solution can be integrated into active antennas for self-alignment purposes. © Institution of Engineering and Technology.All Rights Reserved.

  • Continuous Beam Steering Antenna with Large 2D Coverage for 5G Applications
    2017
    Co-Authors: Karim Tekkouk, Jiro Hirokawa, Makoto Ando, Ronan Sauleau
    Abstract:

    A gap waveguide Continuous Beam steering antenna is proposed in the 60-GHz band for 5G applications. The antenna is composed of two parts i) a quasi-TEM feeding network, ii) a slotted radiating plate. The relative mechanical rotation between the two parts generates a phase gradient across the radiating part and the Beam radiated in the upper hemisphere can be scanned Continuously. The antenna is developed in hollow waveguide with a contactless technology to ease the mechanical movement between the antenna parts. The proposed antenna has been validated numerically and experimentally in the 60-GHz band. Very good agreement has been obtained between simulations and measurements. The antenna field of view reaches +/- 60 degrees. and its bandwidth equals 13% for VSWR

  • wideband and large coverage Continuous Beam steering antenna in the 60 ghz band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to ±60°. The antenna bandwidth is up to 13% for VSWR <2. The loss within the antenna structure is estimated to be around 0.86 dB.

  • Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Junko Hirokawa, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to +/- 60 degrees. The antenna bandwidth is up to 13% for VSWR

Jiro Hirokawa - One of the best experts on this subject based on the ideXlab platform.

  • Continuous Beam Steering Antenna with Large 2D Coverage for 5G Applications
    2017
    Co-Authors: Karim Tekkouk, Jiro Hirokawa, Makoto Ando, Ronan Sauleau
    Abstract:

    A gap waveguide Continuous Beam steering antenna is proposed in the 60-GHz band for 5G applications. The antenna is composed of two parts i) a quasi-TEM feeding network, ii) a slotted radiating plate. The relative mechanical rotation between the two parts generates a phase gradient across the radiating part and the Beam radiated in the upper hemisphere can be scanned Continuously. The antenna is developed in hollow waveguide with a contactless technology to ease the mechanical movement between the antenna parts. The proposed antenna has been validated numerically and experimentally in the 60-GHz band. Very good agreement has been obtained between simulations and measurements. The antenna field of view reaches +/- 60 degrees. and its bandwidth equals 13% for VSWR

  • wideband and large coverage Continuous Beam steering antenna in the 60 ghz band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to ±60°. The antenna bandwidth is up to 13% for VSWR <2. The loss within the antenna structure is estimated to be around 0.86 dB.

  • Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Junko Hirokawa, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to +/- 60 degrees. The antenna bandwidth is up to 13% for VSWR

Junko Hirokawa - One of the best experts on this subject based on the ideXlab platform.

  • Wideband and Large Coverage Continuous Beam Steering Antenna in the 60-GHz Band
    IEEE Transactions on Antennas and Propagation, 2017
    Co-Authors: Karim Tekkouk, Ronan Sauleau, Junko Hirokawa, Jiro Hirokawa, Makoto Ando
    Abstract:

    A wideband and Continuous Beam steering flat antenna is proposed in the 60-GHz band. The antenna consists of two layers and is made of two parts: 1) a feeding network and 2) a slotted plate. The relative rotation movement between the two antenna parts generates a phase gradient across the radiating part, and a Continuous Beam is generated in the upper hemisphere. The mechanical movement between the two antenna parts is facilitated by the use of gap waveguides; therefore, no electrical contact is needed between the two metallic parts. To validate the antenna concept, an antenna has been designed and fabricated in the 60-GHz band. Good agreement has been obtained between the simulations and the measurements. The antenna field of view is up to +/- 60 degrees. The antenna bandwidth is up to 13% for VSWR