A Compact Reconfigurable NRI-TL Metamaterial Phase-Shifter for Antenna Applications

Muhammad Ali Babar Abbasi; Marco A. Antoniades; Symeon Nikolaou

doi:10.1109/TAP.2017.2777520

A Compact Reconfigurable NRI-TL Metamaterial Phase-Shifter for Antenna Applications

Muhammad Ali Babar Abbasi, Marco A. Antoniades, Symeon Nikolaou

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

542 Downloads (Pure)

Abstract

This paper presents a compact reconfigurable phase-shifter based on negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. Two inter-switchable NRI-TL metamaterial unit cells are collocated within the same board area, and can be reconfigured based on the biasing polarity of embedded PIN diodes to provide two discrete phase states. The PIN diodes are located on the shunt branches of the metamaterial line in order to reduce losses in the direct signal path. Design limitations in terms of return loss and insertion loss are discussed in relation to the two phase states. A proof-of-concept module with a size of 17.8 × 21.6 mm2 is designed at 1 GHz, with measured insertion phases of −14.5° and +58.5° in the two phase states leading to a differential phase shift of 73°, while exhibiting insertion losses of 1.43 dB and 0.89 dB, respectively. The combined bandwidth for which the reflection coefficient in both states remains simultaneously below −10 dB is 0.46 GHz (46%), from 0.83 GHz to 1.29 GHz.

Original language	English
Pages (from-to)	1-1
Journal	IEEE Transactions on Antennas and Propagation
Early online date	24 Nov 2017
DOIs	https://doi.org/10.1109/TAP.2017.2777520
Publication status	Early online date - 24 Nov 2017
Externally published	Yes

Keywords

Impedance matching
Inductors
Loading
metamaterial
Metamaterials
Negative-refractive-index transmission-line (NRI-TL)
phase shifter
Phase shifters
Power transmission lines
reconfigurable
Shunts (electrical)

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

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A Compact Reconfigurable NRI-TL Metamaterial Phase-Shifter for Antenna Applications
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Cite this

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title = "A Compact Reconfigurable NRI-TL Metamaterial Phase-Shifter for Antenna Applications",

abstract = "This paper presents a compact reconfigurable phase-shifter based on negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. Two inter-switchable NRI-TL metamaterial unit cells are collocated within the same board area, and can be reconfigured based on the biasing polarity of embedded PIN diodes to provide two discrete phase states. The PIN diodes are located on the shunt branches of the metamaterial line in order to reduce losses in the direct signal path. Design limitations in terms of return loss and insertion loss are discussed in relation to the two phase states. A proof-of-concept module with a size of 17.8 × 21.6 mm2 is designed at 1 GHz, with measured insertion phases of −14.5° and +58.5° in the two phase states leading to a differential phase shift of 73°, while exhibiting insertion losses of 1.43 dB and 0.89 dB, respectively. The combined bandwidth for which the reflection coefficient in both states remains simultaneously below −10 dB is 0.46 GHz (46%), from 0.83 GHz to 1.29 GHz.",

keywords = "Impedance matching, Inductors, Loading, metamaterial, Metamaterials, Negative-refractive-index transmission-line (NRI-TL), phase shifter, Phase shifters, Power transmission lines, reconfigurable, Shunts (electrical)",

author = "Abbasi, {Muhammad Ali Babar} and Antoniades, {Marco A.} and Symeon Nikolaou",

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AU - Nikolaou, Symeon

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AB - This paper presents a compact reconfigurable phase-shifter based on negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. Two inter-switchable NRI-TL metamaterial unit cells are collocated within the same board area, and can be reconfigured based on the biasing polarity of embedded PIN diodes to provide two discrete phase states. The PIN diodes are located on the shunt branches of the metamaterial line in order to reduce losses in the direct signal path. Design limitations in terms of return loss and insertion loss are discussed in relation to the two phase states. A proof-of-concept module with a size of 17.8 × 21.6 mm2 is designed at 1 GHz, with measured insertion phases of −14.5° and +58.5° in the two phase states leading to a differential phase shift of 73°, while exhibiting insertion losses of 1.43 dB and 0.89 dB, respectively. The combined bandwidth for which the reflection coefficient in both states remains simultaneously below −10 dB is 0.46 GHz (46%), from 0.83 GHz to 1.29 GHz.

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KW - Power transmission lines

KW - reconfigurable

KW - Shunts (electrical)

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