Isolation Enhancement and Radar Cross Section Reduction of MIMO Antenna With Frequency Selective Surface

Thummaluru, Sreenath Reddy; Kumar, Rajkishor; Chaudhary, Raghvendra Kumar

doi:10.1109/tap.2018.2794417

Cited by 109 publications

(54 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reference demonstrates that mushroom structure can enhance the isolation of a four‐element antenna system. In Reference , the conventional ground plane in the MIMO system is replaced with FSS, which is beneficial for improving the isolation between the antenna elements as well as reducing MIMO antenna radar cross section. In addition, Reference presents that metamaterial integration is also a potential method to reduce the mutual coupling.…”

Section: High‐isolation Mimo System Using the Proposed Fssmentioning

confidence: 99%

A graphene‐based tunable miniaturized‐element frequency selective surface in terahertz band and its application in high‐isolation multiple‐input multiple‐output system

Luo

Zeng

Yan

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

Graphene is a promising material for terahertz (THz) reconfigurable devices due to the tunability of the surface conductivity. Here, a graphene-based THz miniaturizedelement tunable band-stop frequency selective surface (FSS) is demonstrated. The proposed FSS unit cell consists of convoluted metallic strips with graphene embedded between adjacent metallic strips. The center resonance frequency of the stop band shows an obvious blue shift from 1.76 to 2.56 THz when increasing the chemical potential of the graphene from 0 to 0.5 eV. Particularly, the convoluted design leads to an ultra-small cell dimension of 11.73% of the free space wavelength at resonance frequency (1.76 THz). In addition, the positive role of the proposed FSS in enhancing the isolation of the multiple-input multiple-output (MIMO) system has been verified through two simple models. This work provides an effective method to design miniaturizedelement graphene-based tunable FSSs, and gives a simple way to realize high-isolation MIMO systems. K E Y W O R D S frequency selective surface, graphene, isolation enhancement, MIMO, terahertz

show abstract

Section: High‐isolation Mimo System Using the Proposed Fssmentioning

confidence: 99%

A graphene‐based tunable miniaturized‐element frequency selective surface in terahertz band and its application in high‐isolation multiple‐input multiple‐output system

Luo

Zeng

Yan

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Patch type FSS exhibits the response of a band stop filter and aperture type FSS behaves like a band pass filter when the unit cell dimension is compatible to the wavelength corresponding to the resonating frequency. Owing to its diverse merits, several researches are going on now a days to design and develop application specific FSS to fulfill its applicability in various modern applications such as electromagnetic shielding, 2 polarizers, 3 absorbers, 4 RFID, 5 cloaking, 6 radomes, 7 reduction of radar cross section 8 and satellite communication 9 . One more modern use of FSS can be noted as antenna gain augmentation when it is integrated to the antenna 10‐21 .…”

Section: Introductionmentioning

confidence: 99%

A compact uniplanar ultra‐wideband frequency selective surface for antenna gain improvement and ground penetrating radar application

Kundu

2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A simple structured single layered frequency selective surface (FSS) that has unit cell size of 11 × 11 mm2, substrate thickness of 0.8 mm only and capable to work in a very widespread band from 0.001 to more than 17 GHz is proposed in this article. The FSS is competent to augment the gain of a UWB monopole antenna by 2 to 3.5 dBi when integrated at the back of antenna. The performances of “antenna‐FSS” structure is evaluated by simulation and experimental measurement where good correlations are obtained. The integrated structure provides wide impedance band (S11 < −10 dB) from 2.82 to 19.94 GHz (more than 150%) with improved broadside radiation and high radiation efficiency profile. The transient and frequency domain characteristics of “antenna‐FSS” composite structure are also evaluated in close proximity of diverse sub‐surfaces such as dry sand, wet sand, wood and concrete where an almost unaltered impedance band profile, linear transfer function response and non‐varying group delay responses are achieved which establishes the applicability of the composite structure in ground penetrating radar for low depth sub‐surface scanning applications.

show abstract

“…In reported literatures, various design techniques have been implemented to principally reduce the mutual coupling in MIMO system such as with implemen-tation of stubs and neutralization lines [2], [3], split ring and complementary split ring resonators [4][5][6], polarization isolation converters [7], various parasitic resonant elements [8], [9], metamaterial based decoupling structure [10], [11] etc. In [12], a novel design utilizing frequency selective surface (FSS) based unconventional ground plane is demonstrated for simultaneous improvement of isolation and radar cross section (RCS) reduction in MIMO antenna. However, to improve gain performance of MIMO system along with reduction in mutual coupling, various metamaterial based designs offer a viable solution as they increase the gain of antenna system and also has the potential to meet the design requirement of reduced mutual coupling that lead us to explore the new possibilities of metamaterial based superstrate designs [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Isolation and Gain Enhancement Using Metamaterial Based Superstrate for MIMO Applications

Mark¹,

Rajak²,

Mandal³

et al. 2019

RADIOENGINEERING

View full text Add to dashboard Cite

In this paper, a metamaterial superstrate inspired multiple-input-multiple-output (MIMO) for gain and isolation enhanced antenna system is investigated for WLAN applications. The superstrate layer generates a resonant cavity effect which results in gain enhancement of the antenna system by 3.73 dBi (65%). The superstrate consists of a novel hexagonal nested ring structure, placed at a height of 0.175λ 0 above antenna and confines the near field coupling between the antenna elements, thereby reducing the mutual coupling. The isolation between each antenna elements is better than 20 dB over the entire band of operation with reduced edge-to-edge spacing of 0.057 λ 0 which makes it suitable for the larger MIMO configurations. The prototype of the proposed design is fabricated and validated through proper measurement that shows the measured impedance bandwidth of 7. . The measured gain and simulated efficiency remains above 8.6 dBi and 84% along with envelope correlation coefficient ˂0.003 over the operating band making the design suitable for high gain MIMO WLAN applications.

show abstract

Isolation Enhancement and Radar Cross Section Reduction of MIMO Antenna With Frequency Selective Surface

Cited by 109 publications

References 19 publications

A graphene‐based tunable miniaturized‐element frequency selective surface in terahertz band and its application in high‐isolation multiple‐input multiple‐output system

A graphene‐based tunable miniaturized‐element frequency selective surface in terahertz band and its application in high‐isolation multiple‐input multiple‐output system

A compact uniplanar ultra‐wideband frequency selective surface for antenna gain improvement and ground penetrating radar application

Isolation and Gain Enhancement Using Metamaterial Based Superstrate for MIMO Applications

Contact Info

Product

Resources

About