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Abhijyoti Ghosh

Bio: Abhijyoti Ghosh is an academic researcher from Mizoram University. The author has contributed to research in topics: Microstrip antenna & Patch antenna. The author has an hindex of 8, co-authored 35 publications receiving 257 citations. Previous affiliations of Abhijyoti Ghosh include Siliguri Institute of Technology.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically, which will reduce the XP radiation field compared to a conventional micro-strip antenna without affecting its copolarised (CP) radiation characteristics.
Abstract: A simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically. This will reduce the XP radiation field compared to a conventional microstrip antenna without affecting its copolarized (CP) radiation characteristics.

69 citations

Journal ArticleDOI
TL;DR: In this paper, a compact rectangular microstrip antenna with a shorted nonradiating edge was proposed and experimentally investigated for signifi cant suppression of cross-polarized (XP) radiation compared to maximum co-Polarized gain.
Abstract: A straightforward and compact rectangular microstrip antenna with a shorted nonradiating edge was proposed and experimentally investigated for signifi cant suppression of cross-polarized (XP) radiation compared to maximum co-polarized gain, without affecting the co-polarized radiation pattern. The proposed antenna was thoroughly studied using simulation and experimental results. A modifi ed cavity model (MCM) was also demonstrated to understand the behavior of the cross-polarized radiation and the complete resonance behavior for the new structure. The proposed theory helps to germinate a real and clear view of the observed phenomena. The proposed idea was experimentally confi rmed with the present structure on three different substrate materials, with different dielectric constants. The new approach presented here provides an insightful visualization-based understanding of cross-polarized suppression with the present structure.

57 citations

Journal ArticleDOI
TL;DR: In this article, a simple rectangular microstrip patch antenna (RMPA) with dumbbell shaped defected ground structure has been proposed and investigated experimentally for significant suppression of cross polarised (XP) radiation compared with maximum co-polarised gain without affecting the co polarised radiation pattern.
Abstract: A simple and compact rectangular microstrip patch antenna (RMPA) with dumbbell shaped defected ground structure has been proposed and investigated experimentally for significant suppression of cross polarised (XP) radiation compared with maximum co-polarised gain without affecting the co-polarised radiation pattern. The investigation shows that the proposed antenna has an excellent co-polarised radiation to XP radiation isolation over wide elevation angle around the broadside for different aspect ratio (width to length ratio or W/L) of RMPA. The proposed idea is justified in the light of concrete theoretical analysis.

36 citations

Journal ArticleDOI
TL;DR: In this article, a rectangular patch with dumbbell-shaped defected patch surface has been studied theoretically and experimentally to improve polarization purity over wide angular range and broad impedance bandwidth, and more than 30 dB co-to-cross-polarization (CP-XP) ratio over entire angular range around the broadside direction with wide impedance bandwidth is obtained.
Abstract: Rectangular patch with dumbbell-shaped defected patch surface has been studied theoretically and experimentally to improve polarization purity over wide angular range and broad impedance bandwidth. More than 30 dB co- to cross-polarization (CP-XP) ratio over entire angular range around the broadside direction with wide impedance bandwidth is obtained. Moreover, the present structure is free from back radiation in terms of XP fields, and it can efficiently suppress the XP radiation in different diagonal planes. The present structure is very simple and easy to manufacture. The present investigation provides an insightful visualization-based understanding of concurrent improvement in impedance bandwidth and the XP radiation characteristics with the present structure.

35 citations

Journal ArticleDOI
TL;DR: In this paper, a simple and compact microstrip antenna of circular geometry with circular cut defected patch surface has been proposed for significant suppression of cross-polarized (XP) radiation compared with maximum co polarized gain.
Abstract: A simple and compact microstrip antenna of circular geometry with circular cut defected patch surface has been proposed for significant suppression of cross-polarized (XP) radiation compared with maximum co-polarized gain without affecting the co-polarized radiation pattern at its dominant mode. This will enhance the polarization purity in the radiation performance of the proposed antenna. About 27–28 dB isolation between co-polarized and XP radiations is achieved with the proposed structure. The present structure is simple and easy to develop commercially. The investigation of the new structure is carried out with a view to eliminate orthogonal resonance, which is generally attributed for high XP radiation from the microstrip patch antenna with conventional circular geometry. Comprehensive study on the resonance and radiation characteristics of the new geometry is presented. The present investigation provides an insightful visualization-based understanding of XP suppression with the present structure.

30 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically, which will reduce the XP radiation field compared to a conventional micro-strip antenna without affecting its copolarised (CP) radiation characteristics.
Abstract: A simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically. This will reduce the XP radiation field compared to a conventional microstrip antenna without affecting its copolarized (CP) radiation characteristics.

69 citations

Journal ArticleDOI
TL;DR: In this article, a shape defected ground structure (DGS) that is asymmetric in a specific radiating plane of a microstrip element has been explored with a view to addressing the cross-polarization (XP) issues.
Abstract: A shaped defected ground structure (DGS) that is asymmetric in a specific radiating plane of a microstrip element has been explored with a view to addressing the cross-polarization (XP) issues. The asymmetric configuration has been conceived from an insight of the inherent asymmetry of the modal fields underneath a probe-fed microstrip patch and has been experimentally demonstrated as the best possible design compared to its predecessors in terms of the reduction in XP fields, angular span of suppression around boresight, and the space occupied by the defects. Different orientations of the defects with reference to the patches of different aspect ratio values have been thoroughly examined. More than 28-dB isolation between co-pol and cross-pol has been achieved over 190° angular range, which is indeed 140° more if compared with a conventional ground plane. Its superior characteristics with respect to the earlier designs have also been documented.

65 citations

Journal ArticleDOI
TL;DR: In this article, a compact, high gain, directive, and superstrate configuration-based metasurface (MS) antenna has been designed, which incorporates a fractal-shaped slotted patch having a periodic arrangement of square patches along with a shorting via at its center and a couple of rectangular slots in the ground plane.
Abstract: In this paper, a novel, compact, high-gain, directive, and superstrate configuration-based metasurface (MS) antenna has been designed, which incorporates a fractal-shaped slotted patch having a periodic arrangement of square patches along with a shorting via at its center and a couple of rectangular slots in the ground plane. The MS is designed over the FR4 dielectric by introducing a periodic arrangement of unit cells in which the unit cell is structured by a C-type patterned patch in the center surrounded by a couple of L-type-shaped patches. The MS is separated by a layer of Teflon from the conventional patch antenna designed over the FR4 dielectric, thereby acting as a superstrate. The proposed antenna provides good impedance matching across the frequency region of 10.14–10.94 GHz with a unidirectional radiation pattern. A fractional bandwidth of 7.6% and a maximum return loss of 24 dB have been realized at 10.44 GHz. The measured realized gain of 7.57 dBi was obtained at the same operating frequency. As the proposed antenna is more efficient, it can be promoted for $X$ -band operations, such as satellite communication, defense purpose, and medical supervision.

64 citations

Journal ArticleDOI
TL;DR: In this paper, a simple wideband magnetoelectric (ME) dipole antenna with a defected ground structure (DGS) is proposed and investigated, and the dimensions of the pair of the quarter-wavelength patch antennas and the halfwavelength electric dipole antennas are changed to extend the impedance bandwidth.
Abstract: In this letter, a simple wideband magnetoelectric (ME) dipole antenna with a defected ground structure (DGS) is proposed and investigated. The dimensions of the pair of the quarter-wavelength patch antennas and the half-wavelength electric dipole antennas are changed to extend the impedance bandwidth. A DGS is used for impedance matching, which is novel in the ME dipole antenna design. A prototype of the proposed antenna is designed, fabricated, and measured. On combining impedance bandwidth and radiation pattern, measured results show that the proposed ME dipole antenna achieves an operating bandwidth of 86.9% (1.38–3.5 GHz) for ${{\vert S}}_{11}\vert , and a stable gain of 7.2 ± 1.2 dBi is realized. A low cross-polarization level and low backlobe radiation level are found across the operating bandwidth.

54 citations