Novel 1-Bit Beam-Scanning Reflectarray With Switchable Linear, Left-Handed, or Right-Handed Circular Polarization

This article proposes a novel reconfigurable reflectarray (RRA) with 1 bit beam scanning and switchable linear, left-handed (LH) circular, or right-handed (RH) circular polarization. To realize a multipolarization switchable RRA fed by a horn of arbitrarily fixed polarization, the unit cell's r...

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Published inIEEE transactions on antennas and propagation Vol. 71; no. 2; pp. 1548 - 1556
Main Authors Hu, Jianjia, Chi, Pei-Ling, Yang, Tao
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Apertures
Beam scanning
Circular polarization
Feeds
Linear polarization
p-i-n diode
P-i-n diodes
Phased arrays
PIN diodes
Polarization
Quantization (signal)
reconfigurable
reflectarray
Reflection
right-/left-handed (RH/LH) circular polarization
Scanning
switchable polarization
Switches
Switching
Unit cell
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Abstract This article proposes a novel reconfigurable reflectarray (RRA) with 1 bit beam scanning and switchable linear, left-handed (LH) circular, or right-handed (RH) circular polarization. To realize a multipolarization switchable RRA fed by a horn of arbitrarily fixed polarization, the unit cell's reflection phases in <inline-formula> <tex-math notation="LaTeX">x </tex-math></inline-formula>- and <inline-formula> <tex-math notation="LaTeX">y </tex-math></inline-formula>-directions are independently controlled to meet the required differential phase in each state. Explicit reflection-phase relation will be given for switching from one polarization to another while fulfilling the 1 bit beam scanning. A <inline-formula> <tex-math notation="LaTeX">10\times 10 </tex-math></inline-formula> RRA was prototyped with each unit cell using only two p-i-n diodes to implement dual functions. The fabricated RRA was tested and it can experimentally demonstrate 2-D beam scanning and polarization switching among 45°/135° linear polarization and LH/RH circular polarization. In circular polarization, the measured peak gain, aperture efficiency, and 1 dB gain bandwidth are 17.2 dBic, 26%, and 8.2%, respectively. In linear polarization, the measured cross-polarization discrimination (XPD) of greater than 15 dB, peak gain of 16.8 dBi, aperture efficiency of 23.9%, and 1 dB bandwidth of 5.3% are obtained.
AbstractList This article proposes a novel reconfigurable reflectarray (RRA) with 1 bit beam scanning and switchable linear, left-handed (LH) circular, or right-handed (RH) circular polarization. To realize a multipolarization switchable RRA fed by a horn of arbitrarily fixed polarization, the unit cell’s reflection phases in [Formula Omitted]- and [Formula Omitted]-directions are independently controlled to meet the required differential phase in each state. Explicit reflection-phase relation will be given for switching from one polarization to another while fulfilling the 1 bit beam scanning. A [Formula Omitted] RRA was prototyped with each unit cell using only two p-i-n diodes to implement dual functions. The fabricated RRA was tested and it can experimentally demonstrate 2-D beam scanning and polarization switching among 45°/135° linear polarization and LH/RH circular polarization. In circular polarization, the measured peak gain, aperture efficiency, and 1 dB gain bandwidth are 17.2 dBic, 26%, and 8.2%, respectively. In linear polarization, the measured cross-polarization discrimination (XPD) of greater than 15 dB, peak gain of 16.8 dBi, aperture efficiency of 23.9%, and 1 dB bandwidth of 5.3% are obtained.
This article proposes a novel reconfigurable reflectarray (RRA) with 1 bit beam scanning and switchable linear, left-handed (LH) circular, or right-handed (RH) circular polarization. To realize a multipolarization switchable RRA fed by a horn of arbitrarily fixed polarization, the unit cell's reflection phases in <inline-formula> <tex-math notation="LaTeX">x </tex-math></inline-formula>- and <inline-formula> <tex-math notation="LaTeX">y </tex-math></inline-formula>-directions are independently controlled to meet the required differential phase in each state. Explicit reflection-phase relation will be given for switching from one polarization to another while fulfilling the 1 bit beam scanning. A <inline-formula> <tex-math notation="LaTeX">10\times 10 </tex-math></inline-formula> RRA was prototyped with each unit cell using only two p-i-n diodes to implement dual functions. The fabricated RRA was tested and it can experimentally demonstrate 2-D beam scanning and polarization switching among 45°/135° linear polarization and LH/RH circular polarization. In circular polarization, the measured peak gain, aperture efficiency, and 1 dB gain bandwidth are 17.2 dBic, 26%, and 8.2%, respectively. In linear polarization, the measured cross-polarization discrimination (XPD) of greater than 15 dB, peak gain of 16.8 dBi, aperture efficiency of 23.9%, and 1 dB bandwidth of 5.3% are obtained.
Author Yang, Tao
Chi, Pei-Ling
Hu, Jianjia
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SubjectTerms Apertures
Beam scanning
Circular polarization
Feeds
Linear polarization
p-i-n diode
P-i-n diodes
Phased arrays
PIN diodes
Polarization
Quantization (signal)
reconfigurable
reflectarray
Reflection
right-/left-handed (RH/LH) circular polarization
Scanning
switchable polarization
Switches
Switching
Unit cell
Title Novel 1-Bit Beam-Scanning Reflectarray With Switchable Linear, Left-Handed, or Right-Handed Circular Polarization
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