A Broadband and Electrically Small Planar Monopole Employing Metamaterial Transmission Line

Liang-yuan, Liu; Wang, Bing‐Zhong

doi:10.1109/lawp.2015.2388762

Cited by 22 publications

(6 citation statements)

References 13 publications

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“…The design challenges associated with the electrically small antennas (ESA) are achieving proper resonating conditions, compact size, etc. [71]. As the size of the antenna reduces operating wavelength shrinks and therefore it is difficult to maintain impedance matching.…”

Section: A Mtm Loadingmentioning

confidence: 99%

Electromagnetic Metamaterials: A New Paradigm of Antenna Design

2021

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The progress of technology in consumer electronics demand an antenna having a compact size, high gain and bandwidth, and multiple antennas at transmitter and receiver to enhance the channel capacity. Over the last decade, numerous techniques are proposed to improve the performance of the antenna. One such technique is the use of metamaterials (MTMs) in antenna design. MTMs are artificial structures to provide unique electromagnetic properties that are not available in natural materials. The unique properties of these materials allow the design of high-performance antennas, filters, and microwave devices which cannot be obtained using traditional antennas. Loading antenna with the one, two, and three-dimensional MTM structures comprised of a periodic subwavelength unit cell exhibits RLC resonant structures and allows to manipulate electromagnetic waves in the antenna system. These structures offer low resonant frequency compared to the antenna resonant frequency resulting in antenna miniaturization and manipulation of electromagnetic waves helps in enhancing the gain and bandwidth, and achieving circular polarization (CP) of an antenna system. Also, metamaterial loading enhances isolation between the antenna elements in the multiple-input-multiple output (MIMO) system by suppressing the surface waves. In this paper, the electromagnetics of MTM with analytical expressions and its application in antenna design are discussed in detail. The MTM-based antennas are classified into MTM loading, MTM inspired antenna, metasurface loading, and composite right/left hand (CRLH) based antennas. The recent development in MTM inspired antenna and its application in antenna miniaturization, enhancing gain and bandwidth, achieving CP and mutual coupling suppression in MIMO antenna systems are discussed to make it useful for further research. INDEX TERMS Circular Polarization (CP), Metamaterial (MTM), gain, bandwidth, high impedance surface (HIS), mutual coupling, antenna miniaturization, composite right/left hand (CRLH).

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Section: A Mtm Loadingmentioning

confidence: 99%

Electromagnetic Metamaterials: A New Paradigm of Antenna Design

2021

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“…However, the applications of these antennas are limited due to their narrow bandwidths. Recently, three types of metamaterial‐based antennas that are characterized with a wide working bandwidth have been proposed 4–10 . The first type of antennas are loaded with electromagnetic bandgap structures.…”

Section: Introductionmentioning

confidence: 99%

“…A good impedance matching can be obtained by adding an electromagnetic bandgap on the ground of the antenna, and the bandwidth is increased to 69.2%. In Liu and Wang, 5 the broadband antenna has been presented. The electromagnetic coupling between the patch and ground can be adjusted by introducing an electromagnetic bandgap that is loaded on the ground; therefore, an extended bandwidth of up to 21.5% can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Wideband asymmetric coplanar waveguide antenna using composite right/left‐handed transmission line

Shi

Zeng

Wang

et al. 2022

Micro & Optical Tech Letters

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A broadband asymmetric coplanar waveguide antenna is designed. In this design, two periodical composite right/left‐handed transmission line (CRLH‐TL) unit cells were chosen to generate three resonating modes. The broadband characteristic of this antenna can be achieved by combining the first‐negative‐order resonance, zeroth‐order resonance, and first‐positive‐order resonance of CRLH‐TL. A prototype structure of our proposed antenna has been fabricated and tested. The dimensions of the antenna are 30.0 × 40.0 × 1.6 mm3, which corresponds to 0.19 λ 0 ${\lambda }_{0}$ × 0.25 λ 0 ${\lambda }_{0}$ × 0.01 λ 0 ${\lambda }_{0}$, where λ 0 ${\lambda }_{0}$ is the free‐space wavelength at 1.88 GHz. The measured band in which S11 is below −10 dB ranges from 1.80 to 3.75 GHz with the fractional bandwidth of 70.27%. The radiation patterns of the proposed antenna are highly consistent throughout the operating band, which covers the band of WiMAX, with the measured average peak gain of 2.77 dBi and radiation efficiency of 86.63%.

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“…Different techniques such as employing a shorting post [1], microstrip fed slot techniques [2] and defected ground structure [3] have been proposed by researchers for developing ESAs for various applications. The performance of ESAs and larger antennas are more or less equal under matched conditions.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial Inspired Electrically Small Multiband Monopole Antenna Using Single DNG MTM and Ring Resonators

Thankachan

Paul

2021

Preprint

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This paper proposes a new metamaterial inspired electrically small multi-band monopole antenna. The proposed antenna is capable of operating at DCS 1800 in the lower band. At the same time, in the higher band, it covers two wireless local area network (WLAN) bands at 2.4 and 5.2 GHz. This paper describes the design and detailed analysis of an electrically small (ka = 0.64 < 1) antenna with a -10dB fractional bandwidth of 2.01%, 1.64% and 2.71% for triple-band operations with centre frequencies 1.80, 2.45 and 5.17 GHz. The compactness is achieved by the application of double negative metamaterial on a monopole antenna operating at 9 GHz. The proposed antenna has an overall compact electrical size 0.14 λ0 × 0.14λ0 × 0.01 λ0 at 1.8 GHz and physical dimensions 24 × 24 × 1.6 mm3 including the ground. In this proposed ESA a second DNG structure is also incorporated to enhance its gain. This enables reliable operations at DCS 1800 and WLAN frequencies 2.4 and 5.2 GHz.

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A Broadband and Electrically Small Planar Monopole Employing Metamaterial Transmission Line

Cited by 22 publications

References 13 publications

Electromagnetic Metamaterials: A New Paradigm of Antenna Design

Electromagnetic Metamaterials: A New Paradigm of Antenna Design

Wideband asymmetric coplanar waveguide antenna using composite right/left‐handed transmission line

Metamaterial Inspired Electrically Small Multiband Monopole Antenna Using Single DNG MTM and Ring Resonators

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