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Your search keyword '"Kingsly, Saffrine"' showing total 29 results
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29 results on '"Kingsly, Saffrine"'

11. Characterization of Delamination in Fiber-Reinforced Epoxy-Based PCB Laminates, Using an EBG-Enhanced Planar Microwave Sensor

Author

K. Malathi, Kingsly Saffrine, Paneerselvam Yogeshwari, Y. V. Ramana Rao, Esther Florence Sundarsingh, Sangeetha Subbaraj, and Vimal R. Samsingh

Subjects
Materials science, 010401 analytical chemistry, Delamination, Metamaterial, 020206 networking & telecommunications, 02 engineering and technology, Band-stop filter, 01 natural sciences, Industrial and Manufacturing Engineering, Microstrip, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Printed circuit board, Planar, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering, Composite material, Reflection coefficient, Microwave
Abstract

A strategy to detect the extent of delamination in fiber-reinforced epoxy-based thermoset polymer used in printed circuit board (PCB) laminates by a planar microwave microstrip sensor has been proposed in this paper. The sensitivity of the sensor probe is improved using electromagnetic band gap (EBG) structures surrounding the planar sensor. The proposed EBG cells acts as a bandstop filter and suppress the propagation of surface wave current. The sensitivity measured in terms of the reflection coefficient of the sensor on the sample was found to increase by 9.5 dB for the sensor with EBG when compared to the sensor without EBG. The sensor is designed and verified through finite-integration-based simulations and validated through measurements after fabrication. The delamination factors for various extents of delamination are detected using the probe and exhibit an accuracy of about 85%.

Published
2017

15. Tunable Band-Notched High Selective UWB Filtering Monopole Antenna

Author

Kingsly, Saffrine, primary, Thangarasu, Deepa, additional, Kanagasabai, Malathi, additional, Alsath, M. Gulam Nabi, additional, Palaniswamy, Sandeep Kumar, additional, Rao, Thipparaju Rama, additional, Subbaraj, Sangeetha, additional, Selvam, Yogeshwari Panneer, additional, Sambandam, Padmathilagam, additional, and Ganesan, Geetha, additional

Published
2019
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19. Bandwidth reconfigurable microwave filter using stepped impedance c‐shaped resonator.

Author

Kingsly, Saffrine, Kanagasabai, Malathi, Mohammed, Gulam Nabi Alsath, Thirunavukkarasu, Manimekalai, Subbaraj, Sangeetha, Palaniswamy, Sandeep Kumar, Bilvam, Sridhar, and Kulandhaisamy, Indhumathi

Subjects
*MICROWAVE filters, *VARACTORS, *AGILE software development, *BANDWIDTHS, *RESONATORS, *INSERTION loss (Telecommunication)
Abstract

This article presents a compact reconfigurable filter performing bandwidth reconfiguration covering the entire L‐band frequency range. The reconfigurable filter is developed using a C‐shaped resonator coupled to the source and load through varactor diodes. To reverse bias the diodes symmetrically both the diodes are fed with a common bias voltage. Hence the DC bias voltage is administered evenly to the diodes resulting is equi‐proportional coupling between the resonator and the nodes. This results in reconfiguring the bandwidth of the operating frequency. The designed filter is capable of tuning 3‐dB bandwidth from 0.613 to 1.353 GHz with the center frequency as 1.5 GHz. The percentage bandwidth of the filter is varied from 44.5% to 91.76%. The insertion loss offered by the filter is very less with the minimum value of 0.42 dB. The proposed filter is simple, compact and finds it application in power agile systems operating with different transmission power levels at different time instances. [ABSTRACT FROM AUTHOR]

Published
2021
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22. A Patch-Slot Antenna Array With Compound Reconfiguration

Author

Panneer Selvam, Yogeshwari, primary, Alsath, M. Gulam Nabi, additional, Kanagasabai, Malathi, additional, Elumalai, Lavanya, additional, Palaniswamy, Sandeep Kumar, additional, Subbaraj, Sangeetha, additional, Kingsly, Saffrine, additional, Konganathan, Gunaseelan, additional, and Kulandhaisamy, Indhumathi, additional

Published
2018
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24. A Low-Profile Frequency- and Pattern-Reconfigurable Antenna

Author

Selvam, Yogeshwari Panneer, primary, Kanagasabai, Malathi, additional, Alsath, M. Gulam Nabi, additional, Velan, Sangeetha, additional, Kingsly, Saffrine, additional, Subbaraj, Sangeetha, additional, Ramana Rao, Y. V., additional, Srinivasan, Raju, additional, Varadhan, Abhai Kumar, additional, and Karuppiah, Meenakshisundaram, additional

Published
2017
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27. Signal integrity analysis on a microstrip ultra-wideband coupled-line coupler.

Author

Kingsly, Saffrine, Velan, Sangeetha, Kanagasabai, Malathi, Subbaraj, Sangeetha, Panneer Selvam, Yogeshwari, and Balasubramaniyan, Bhuvaneswari

Subjects
*SIGNAL integrity (Electronics), *MICROSTRIP transmission lines, *ACOUSTIC couplers, *BANDWIDTHS, *PROTOTYPES
Abstract

In this paper, a compact, single-section, Ultra-wideband (UWB) coupled-line coupler designed using concentric loop in the signal plane and defect in the ground plane is presented. Bandwidth enhancement is achieved with low coupling at the X-band satellite downlink range to improve the signal strength for defence applications. Return loss greater than 15 dB and isolation greater than 20 dB is achieved over the entire UWB band. The prototype is fabricated and tested to validate the simulation results. Further to detect the quality of the output signal, signal integrity analysis is performed and metrics such as error vector magnitude (EVM), magnitude and phase error, eye pattern, constellation plots and signal to noise ratio are presented for the proposed UWB coupled-line coupler. [ABSTRACT FROM AUTHOR]

Published
2019
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29. An Integrated Tri-Band/UWB Polarization Diversity Antenna for Vehicular Networks.

Author

Alsath, M. Gulam Nabi, Arun, Henridass, Selvam, Yogeshwari Panneer, Kanagasabai, Malathi, Kingsly, Saffrine, Subbaraj, Sangeetha, Sivasamy, Ramprabhu, Palaniswamy, Sandeep Kumar, and Natarajan, Rajesh

Subjects
VEHICULAR ad hoc networks, ANTENNAS (Electronics), ULTRA-wideband devices, DIODES, UNIT cell, RADIATORS
Abstract

The design, fabrication, and testing of an integrated polarization diversity antenna array for maximizing the wireless channel link in vehicular networks are presented in this paper. The diversity antenna is constructed using unit cell radiators that provide two operating modes. The mode transition is achieved using a pair of PIN diodes. In one state, the antenna provides multiband operation centered at 2.4, 3.5, and 5.8 GHz. In the other state, the antenna covers the entire ultra-wideband (UWB) spectrum. The unit cell radiators are distributed in the horizontal and vertical plane to achieve polarization diversity. Apart from offering a polarization diversity antenna, the orientation of antennas offers a reliable link with the communication devices. The prototype antenna array is fabricated and tested for diversity performance. The performance metrics such as envelope correlation coefficient, diversity gain, and mean effective gain under isotropic, indoor, and outdoor conditions are evaluated and presented. [ABSTRACT FROM AUTHOR]

Published
2018
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