Broadband, Efficient, Electrically Small Metamaterial-Inspired Antennas Facilitated by Active Near-Field Resonant Parasitic Elements

Jin, Peng; Ziolkowski, Richard W.

doi:10.1109/tap.2009.2037708

Cited by 81 publications

(2 citation statements)

References 17 publications

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“…Meta-surface can be used to minimize negative effects of surface waves on any resonators. It can also be used to alter the scattering characteristics of resonators simply by patterning the exterior of the resonator with meta-surface, the scattering characteristics can be altered to a more desired pattern [8][9].…”

Section: Introductionmentioning

confidence: 99%

Radiation Enhancement Using Circular Split Ring Meta-Surface Mirror for a Small Patch Resonator

Ezanuddin

Ismail

Azmi

2015

AMM

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This paper investigate the radiation efficiency enhancement for a small square patch resonator with the integration of single layer circular split ring metasurface mirror (CSRMM) operating at 5.8 GHz using Transmission Line Matrix (TLM) method. The single layer CSRMM provide an appropriate reflection phase to act as a mirror and is able to enhance the resonator gain and efficiency. This work shows a linear phase response from 5.8 GHz to 5.9929 GHz that is sufficient for 50 Ω wireless communication system operation. A siginificant improvement of 0.391 to 0.741 dBi IEEE gain over the whole frequency range was demonstrated. The resonator has an initial radiation efficiency of 0.246 and incremented to 0.406 once CSRMM is inserted. The resonator small size configuration provides adequate space for mounting the mirror close to the resonator, making it more fitting for modern wireless devices.

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Section: Introductionmentioning

confidence: 99%

Radiation Enhancement Using Circular Split Ring Meta-Surface Mirror for a Small Patch Resonator

Ezanuddin

Ismail

Azmi

2015

AMM

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“…A promising technique at microwave frequencies involves the use of negative impedance converter (NIC) circuits as loads to modulate the impedance of the constituent unit cells of an effective medium [8,12]. The idea is well known in the antenna engineering community, where NIC loads have been used to significantly improve the impedance matching bandwidth of electrically small antennas [13][14][15]. In a similar manner, the impedance properties of, for example, electric or magnetic dipoles may be modified in order to control the electric or magnetic properties of a material.…”

Section: Introductionmentioning

confidence: 99%

Characterization of active metamaterials based on negative impedance converters

Rajab

Fan

Yan-Ming

2012

J. Opt.

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Negative impedance converters (NICs) are used to create impedance loads that can effectively cancel the inductive properties of magnetic dipoles, resulting in active metamaterials with increased bandwidth and reduced loss for µ-near-zero (MNZ) and negative-Re(µ) (MNG) media. We demonstrate techniques for analyzing the stability and characterizing the magnetic properties of effective media loaded with NICs. Specifically, we apply the Nyquist criterion to validate the stability of sample active metamaterials. It is shown that the practical NIC-loaded metamaterial may maintain stability and reduce dispersion, albeit with reduced performance as compared to the ideal NIC load.

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Electrically Small Antenna Advances for Current 5G and Evolving 6G and Beyond Wireless Systems

Ziolkowski

2022

Antenna and Array Technologies for Future Wireless Ecosystems

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Broadband, Efficient, Electrically Small Metamaterial-Inspired Antennas Facilitated by Active Near-Field Resonant Parasitic Elements

Cited by 81 publications

References 17 publications

Radiation Enhancement Using Circular Split Ring Meta-Surface Mirror for a Small Patch Resonator

Radiation Enhancement Using Circular Split Ring Meta-Surface Mirror for a Small Patch Resonator

Characterization of active metamaterials based on negative impedance converters

Electrically Small Antenna Advances for Current 5G and Evolving 6G and Beyond Wireless Systems

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