Electromagnetic-wave beam-scanning antenna using near-field rotatable graded-dielectric plates

Afzal, Muhammad U.; Lalbakhsh, Ali; Esselle, Karu P.

doi:10.1063/1.5049204

Cited by 54 publications

(22 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unlike most of the above-mentioned techniques which have a by-product of slight gainreduction, metasurfaces can be utilized for mutual coupling reduction. Metasurfaces are 2D form of metamaterials and have exceptional abilities for controlling electromagnetic waves, which can be used for variety of applications, such as suppressing unwanted coupling effects, beamsteering [6,8]. In [6], a waveguide based metasurface was designed to exhibit a bandgap with two transmission zeros, which attributed to negative permeability and negative permittivity in the vicinity of magnetic resonance and electric resonance, respectively.…”

Section: Introductionmentioning

confidence: 99%

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mohamadzade¹,

Lalbakhsh²,

Simorangkir³

et al. 2020

PIER M

Self Cite

View full text Add to dashboard Cite

This paper presents the simultaneous application of Minkowski fractal geometry and EBG structures for mutual coupling reduction in microstrip array antennas for the first time. In this approach, a modified version of Minkowski fractal geometry is applied on the patch elements, and at the same time 1D electromagnetic bandgap (EBG) structures, composed of 4 EBG elements, are placed between the array elements in a very close distance. Unlike many other coupling reduction methods, which have at least one of the issues of gain reduction or complex fabrication, the proposed method does need any via or double-sided etching and slightly increases the gain of the antenna, while an excellent reduction level of 22.7 dB has been achieved. To verify the concept, 2 array antennas with the spacing of λ 0 and λ 0 /3 were fabricated and tested, showing very good agreement between predicted and measured results.

show abstract

Section: Introductionmentioning

confidence: 99%

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mohamadzade¹,

Lalbakhsh²,

Simorangkir³

et al. 2020

PIER M

Self Cite

View full text Add to dashboard Cite

show abstract

“…Working as a spatial filter, traditional frequency selective surface (FSS) is constituted by an infinite array of metallic patterns printed on a dielectric substrate to control the transmission and reflection of an incident electromagnetic wave [1]. Additionally, it is reported that FSSs can be made of different materials, like all-dielectric materials [2], printed surfaces [3], or all metal structures [4]. Since natural materials do not possess the characteristic of frequency selectivity, FSS is also classified as the concept of metasurface by some scholars, which has gained a lot of attention over the past decade [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Frequency Selective Surface With Two Non-Interfering Passbands

Wang¹,

Wang²

2020

PIER Letters

View full text Add to dashboard Cite

A novel dual-band frequency selective surface (FSS) operating at Ku-and Ka-bands is presented in this paper. The proposed FSS is an aperture element constituted by a square loop loaded with four symmetrical umbrella-shaped stubs on the front side of the dielectric substrate. A good angular stability up to 60 • angle of incidence for both TE and TM polarizations is provided by the FSS. Moreover, the two passbands of FSS can be controlled independently and flexibly by changing corresponding structural parameters. A prototype of the FSS is fabricated and measured. The good agreement between simulation and measurement results further proves the performance of the FSS.

show abstract

“…Frequency selective surfaces (FSSs) are basically two-dimensional arrays of patches on a dielectric slab or that of apertures within a metallic screen to perform the desired filtering operation [1]. There are some other FSSs made of only dielectrics [2][3][4] which are useful for large bandwidth, wideband near-field correction, and beam-scanning applications, respectively. Though the use of traditional LC filters fulfills the requirement of a filtering system in some cases, its use is not suitable at all situations.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Mobile Phone Radiation Exposure Using Multi-Stopband Frequency Selective Surface

Paul¹,

Mandal²,

Acharjee³

et al. 2019

PIER M

View full text Add to dashboard Cite

Here, a multi-stopband frequency selective surface (FSS), covering commercial frequency bands CDMA, GSM-900, GSM-1800, LTE-2200 MHz, Wi-Fi, and Bluetooth for mobile communication applications has been proposed employing a pair of concentric square ring patches as a unit cell. Possibilities of annular ring patch type FSS are explored first. Finally, the design comes up with a compact square ring patch type single layer FSS. It is also explored that by increasing the width of the inner ring, operating bandwidth can be enhanced to cover closely spaced commercial frequency bands in a single band. Thereby the mutual coupling between the closely spaced resonators for multiple bands can be minimized. The proposed design is flexible enough to tune the desired resonance frequency by changing the length of the individual ring resonators. The design concept has been formulated using linear polynomial regression (LPR) techniques and validated through proper measurement of the fabricated prototype. This FSS can be used as a mobile back cover to protect mobile users from harmful radiations.

show abstract

Electromagnetic-wave beam-scanning antenna using near-field rotatable graded-dielectric plates

Cited by 54 publications

References 24 publications

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

A Novel Frequency Selective Surface With Two Non-Interfering Passbands

Reduction of Mobile Phone Radiation Exposure Using Multi-Stopband Frequency Selective Surface

Contact Info

Product

Resources

About