Dr. Arpan Desai
Charotar University of Science and Technology (CHARUSAT)
+1
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Academic Career Length
12Years (2015-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 January 2021 in AEU - International Journal of Electronics and Communications
Journal Article
27 October 2021 in IEEE Access
Journal Article
Arpan DesaiMPMerih Palandoken
Merih PalandokenJKJayshri Kulkarni
Jayshri Kulkarni
Gangil ByunTNTruong Nguyen
Truong NguyenA flexible transparent wideband four-element MIMO antenna with a connected ground plane is proposed with numerical computation and experimental measurement studies. The optical transparency is obtained using flexible conductive oxide material AgHT-4 and Melinex substrate. The radiating elements are in the form of circular stub-loaded C-shaped resonators, which are positioned in a carefully structured flexible Melinex substrate with an interconnected partial ground plane structured in the form of an L-shaped resonator, attaining an overall antenna size of $0.33\lambda \times 0.48\lambda $ at the lowest operating frequency. The proposed antenna spans over a −10 dB impedance bandwidth of 2.21–6 GHz (92.32%) with an isolation level greater than 15dB among all elements. The maximum gain is 0.53dBi with a minimum efficiency of 41%, respectively which is satisfactory considering flexible structure and sheet impedance of $4\Omega $ /sq. MIMO antenna parameters in terms of the envelope correlation coefficient (ECC) and diversity gain (DG) are also extracted where all the values are satisfactory for MIMO applications. The bending analysis of the proposed transparent MIMO antenna along the X and Y axis has revealed good performance in terms of scattering parameters and radiation pattern along with MIMO diversity performance. All of these technical points make the flexible MIMO antenna suitable for smart devices using sub-6 GHz 5G and WLAN band in IoT applications where visual clutter and co-site location issues need to be mitigated with the integration ease of conformal placement on the curved component/device surfaces.
23 October 2020 in IEEE Access
Journal Article
Arpan DesaiCBCong Danh Bui
Cong Danh Bui
JPJay Patel
Jay Patel
Trushit Kirtikumar UpadhyayaGangil ByunTNTruong Nguyen
Truong NguyenA four-element compact wide-band optically transparent MIMO antenna with a full ground plane is proposed. The four elements transparent MIMO system has a compact size of $24\times 20$ mm 2 with the undivided ground plane as most of the real-time systems demand a common reference. The complete antenna system achieves around 85% transparency due to a combination of AgHT-8 and Plexiglas which forms the transparent conductive patch/ground and substrate, respectively. The antenna geometry leads dual-band operation ranging from 24.10 - 27.18 GHz (Impedance bandwidth = 12%) and 33 - 44.13 GHz (Impedance bandwidth $=28.86$ %) targeting the mm-wave 5G applications. The 4-element antenna system achieves isolation between inter-elements >16 dB and maximum gain value of greater than 3 dBi with more than 75% efficiency. The proposed transparent MIMO antenna is evaluated in terms of diversity gain (DG), envelope correlation coefficient (ECC), total active reflection coefficient (TARC), and mean effective gain (MEG) where decent MIMO performance with isolation more than >16 dB between the adjacent and other elements is achieved. Transparent MIMO antenna achieves directional patterns for the operating band with the value of DG >9, ECC < 0.1, TARC value less than −15dB, and the ratio of MEG within the agreed limit of ±3 dB confirming acceptable MIMO/diversity performance.
30 May 2022 in IEEE Access
Journal Article
Arpan DesaiJKJayshri Kulkarni
Jayshri Kulkarni
M M KamruzzamanSHStepan Hubalovsky
Stepan Hubalovsky
Heng-Tung Hsu
Ahmed IbrahimA coplanar waveguide (CPW) fed flexible interconnected 4-port MIMO antenna is proposed for UWB, X, and Ku band applications having a size $0.67\lambda \times 0.81\lambda \times 0.0028\lambda $ (at 3.58 GHz). The antenna parameters are characterized by using sets of real measurements to validate the antenna design and modelling. A precise milling machine is used for fabricating the single and 4-port antennas over a flexible FR-4 Substrate. Vector network analyser (VNA) is used for measuring scattering and transmission coefficients. As well as, a shielded anechoic chamber is utilised for measuring the far field radiations and the gain of the antenna under test (AUT). The basic antenna that is a part of the 4-port structure consists of a CPW fed octagonal structure surrounded by an octagonal-shaped slot. The MIMO ability is achieved by arranging the 4 identical elements symmetrically in a successive rotational means for achieving good polarization diversity. The connected ground between the elements is achieved by introducing a plus-shaped slotted structure separated by a slotted diamond at the center in the 4-port structure. None of the slots touches each other thus ensuring the common reference while maintaining the inter-element isolation better than 15 dB. The antenna demonstrated maximum gain and minimum efficiency of 6.8 dBi and 89%, respectively besides attaining a 10-dB impedance bandwidth of 125.83% (3.89-17.09 GHz) and envelope correlation coefficient (ECC) < 0.02. Finally, the 4-port flexible antenna is tested in terms of S parameters and ECC under bending conditions along the X and Y axis followed by a time-domain analysis that exhibited very good performance.
3 February 2020 in Microwave and Optical Technology Letters
Journal Article
Arpan DesaiTrushit Kirtikumar UpadhyayaJPJay Patel
Jay Patel
Riki Patel
Merih Palandoken13 April 2021 in International Journal of RF and Microwave Computer-Aided Engineering
Journal Article
About Me
I have received a B.E. degree in Electronics and Communication Engineering from Sardar Patel University, Gujarat, India, in 2006; M.Sc. Degree in Wireless Communication Systems from Brunel University, London, United Kingdom in 2008; and a Ph.D. degree from Charotar University of Science and Technology, Gujarat, India in the field of Transparent Antennas in January 2020.
Currently, I am working as a Postdoctoral Researcher at Ton Duc Thang University, Ho Chi Minh, Vietnam.
My current research interests include transparent antennas for MIMO applications, energy harvesting devices, transparent DRAs, and flexible wearable antennas.
I am also working as an Assistant Professor in the Electronics and Communication Engineering Department, Charotar University of Science and Technology, Gujarat, India. Additionally I am serving as a Technical Activity Chair for IEEE Signal Processing Society, Gujarat Section.
I have published more than 40 research articles, mostly in SCI/ Scopus journals, international conferences and book chapters.