Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a new design concept of a beam-steerable, two-element array of microstrip patch antennas for 5G smartphone applications. The main beam is steered toward different directions through the use of a tunable phase shifter based on nematic liquid crystals (N-LC). The relative phase introduced at the input terminals of the two patch antennas is controlled through a bias voltage between 0 and 10 Volts. This external bias voltage changes the orientation of the LC molecules inside a cavity underneath the microstrip line, thus affecting the dielectric constant of the material, and effectively, the time delay. The antennas are fed through a feed network of microstrip lines. This design was optimized to provide impedance matching and low reflection coefficient. Simulation results using ANSYS HFSS reveal that the main beam can be switched toward different directions through the use of a low-intensity, low-frequency AC voltage that is applied externally between the microstrip line of the phase shifter and the common ground.

Original languageEnglish
Title of host publication13th European Conference on Antennas and Propagation, EuCAP 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788890701887
Publication statusPublished - 1 Mar 2019
Event13th European Conference on Antennas and Propagation, EuCAP 2019 - Krakow, Poland
Duration: 31 Mar 20195 Apr 2019

Publication series

Name13th European Conference on Antennas and Propagation, EuCAP 2019

Conference

Conference13th European Conference on Antennas and Propagation, EuCAP 2019
CountryPoland
CityKrakow
Period31/03/195/04/19

Fingerprint

Liquid Crystals
Phase shifters
Microstrip lines
Microstrip antennas
Liquid Crystal
Liquid crystals
Antenna
Voltage
Antenna feeders
Bias voltage
Patch
Line
Nematic liquid crystals
Reflection Coefficient
Smartphones
Dielectric Constant
ANSYS
Nematic Liquid Crystal
Impedance
Low Frequency

Keywords

  • Nematic liquid crystals
  • reconfigurable antennas
  • steerable arrays
  • tunable phase shifters

Cite this

Nestoros, M., Papanicolaou, N. C., & Polycarpou, A. C. (2019). Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters. In 13th European Conference on Antennas and Propagation, EuCAP 2019 [8740163] (13th European Conference on Antennas and Propagation, EuCAP 2019). Institute of Electrical and Electronics Engineers Inc..
Nestoros, Marios ; Papanicolaou, Nectarios C. ; Polycarpou, Anastasis C. / Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters. 13th European Conference on Antennas and Propagation, EuCAP 2019. Institute of Electrical and Electronics Engineers Inc., 2019. (13th European Conference on Antennas and Propagation, EuCAP 2019).
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abstract = "In this paper, we propose a new design concept of a beam-steerable, two-element array of microstrip patch antennas for 5G smartphone applications. The main beam is steered toward different directions through the use of a tunable phase shifter based on nematic liquid crystals (N-LC). The relative phase introduced at the input terminals of the two patch antennas is controlled through a bias voltage between 0 and 10 Volts. This external bias voltage changes the orientation of the LC molecules inside a cavity underneath the microstrip line, thus affecting the dielectric constant of the material, and effectively, the time delay. The antennas are fed through a feed network of microstrip lines. This design was optimized to provide impedance matching and low reflection coefficient. Simulation results using ANSYS HFSS reveal that the main beam can be switched toward different directions through the use of a low-intensity, low-frequency AC voltage that is applied externally between the microstrip line of the phase shifter and the common ground.",
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Nestoros, M, Papanicolaou, NC & Polycarpou, AC 2019, Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters. in 13th European Conference on Antennas and Propagation, EuCAP 2019., 8740163, 13th European Conference on Antennas and Propagation, EuCAP 2019, Institute of Electrical and Electronics Engineers Inc., 13th European Conference on Antennas and Propagation, EuCAP 2019, Krakow, Poland, 31/03/19.

Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters. / Nestoros, Marios; Papanicolaou, Nectarios C.; Polycarpou, Anastasis C.

13th European Conference on Antennas and Propagation, EuCAP 2019. Institute of Electrical and Electronics Engineers Inc., 2019. 8740163 (13th European Conference on Antennas and Propagation, EuCAP 2019).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters

AU - Nestoros, Marios

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AU - Polycarpou, Anastasis C.

PY - 2019/3/1

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N2 - In this paper, we propose a new design concept of a beam-steerable, two-element array of microstrip patch antennas for 5G smartphone applications. The main beam is steered toward different directions through the use of a tunable phase shifter based on nematic liquid crystals (N-LC). The relative phase introduced at the input terminals of the two patch antennas is controlled through a bias voltage between 0 and 10 Volts. This external bias voltage changes the orientation of the LC molecules inside a cavity underneath the microstrip line, thus affecting the dielectric constant of the material, and effectively, the time delay. The antennas are fed through a feed network of microstrip lines. This design was optimized to provide impedance matching and low reflection coefficient. Simulation results using ANSYS HFSS reveal that the main beam can be switched toward different directions through the use of a low-intensity, low-frequency AC voltage that is applied externally between the microstrip line of the phase shifter and the common ground.

AB - In this paper, we propose a new design concept of a beam-steerable, two-element array of microstrip patch antennas for 5G smartphone applications. The main beam is steered toward different directions through the use of a tunable phase shifter based on nematic liquid crystals (N-LC). The relative phase introduced at the input terminals of the two patch antennas is controlled through a bias voltage between 0 and 10 Volts. This external bias voltage changes the orientation of the LC molecules inside a cavity underneath the microstrip line, thus affecting the dielectric constant of the material, and effectively, the time delay. The antennas are fed through a feed network of microstrip lines. This design was optimized to provide impedance matching and low reflection coefficient. Simulation results using ANSYS HFSS reveal that the main beam can be switched toward different directions through the use of a low-intensity, low-frequency AC voltage that is applied externally between the microstrip line of the phase shifter and the common ground.

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KW - steerable arrays

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M3 - Conference contribution

T3 - 13th European Conference on Antennas and Propagation, EuCAP 2019

BT - 13th European Conference on Antennas and Propagation, EuCAP 2019

PB - Institute of Electrical and Electronics Engineers Inc.

ER -

Nestoros M, Papanicolaou NC, Polycarpou AC. Design of Beam-Steerable Array for 5G Applications Using Tunable Liquid-Crystal Phase Shifters. In 13th European Conference on Antennas and Propagation, EuCAP 2019. Institute of Electrical and Electronics Engineers Inc. 2019. 8740163. (13th European Conference on Antennas and Propagation, EuCAP 2019).