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Papers by Sellakkutti Suganthi

2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

Trends in Sciences

A novel Defected Ground Structure (DGS) is proposed to miniaturize a 2×2 Modified Corporate Feed ... more A novel Defected Ground Structure (DGS) is proposed to miniaturize a 2×2 Modified Corporate Feed Planar Antenna Array (M-CFPA) with a modified corporate feeding network. The DGS altered the surface current distribution and shifted the resonance frequency to the lower side. After running a parametric sweep of length and width of the patch antenna element, achieved the miniaturized antenna array resonating at 2.4 GHz frequency. The proposed antenna array is designed using Rogers/RT Duroid 5,880 ( ) substrate with a thickness of 1.6 mm. The overall dimensions of the proposed Planar Array with DGS (PA-DGS) is 25.2723 % lesser than M-CFPA. The M-CFPA has a peak gain of 11.53 dB with a - 10 dB reflection coefficient bandwidth of 118 MHz. The proposed PA-DGS array exhibits a peak gain of 9.51 dB with 100 MHz -10 dB bandwidth. HIGHLIGHTS One of the major challenges faced in antenna array design is creating an efficient feed network An optimum feed network is designed to miniaturize the ante...

Journal of Physics: Conference Series, 2021

This paper investigates the design and implementation of a novel hybrid metamaterial unit cell to... more This paper investigates the design and implementation of a novel hybrid metamaterial unit cell to improve a beamforming Wi-Fi antenna’s performance. The proposed metamaterial unit cell is created on an FR-4 substrate (εγ = 4.4) and a thickness of 1.6 mm. The metallization height of the unit cell is maintained at 0.035 mm. The designed metamaterial unit cell is simulated using HFSS Ver. 18.2 to verify the double negative behaviour. The unit cell consists of five Split Ring Resonators (SRR’s) at the bottom and a hexagonal ring of six triangles. Initially, a conventional inset fed microstrip patch antenna is designed then an array of the proposed unit cell is created and used as a superstrate to study the performance. A Three Element Antenna Array (TEAA) is designed to operate at 2.4 GHz Wi-Fi band, and the superstrate created out of the proposed unit cell is used to study its effect. Metamaterial superstrate improved the conventional Single Element Antenna (SEA) gain by approximately ...

2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)

Progress In Electromagnetics Research C, 2020

The aim of this paper is to highlight and elaborate the construction and establishment of a recta... more The aim of this paper is to highlight and elaborate the construction and establishment of a rectangular anechoic chamber (AC) of dimensions 7 m × 4 m × 3 m working from 0.1 GHz to 40 GHz. It is an informative checklist giving an insight on the reckoning of chamber dimensions and selection of appropriate absorbers as per the required specifications. It briefs the key features of validation of an anechoic chamber, namely, shielding effectiveness and reflectivity (quiet zone). It describes the intricacies of the integration of systems such as vector network analyzer (VNA), antenna mounting stands, three-axes motorized antenna rotation control circuitry, and customized software. The validation of the established chamber is accomplished for overall shielding effectiveness of −80 dB and reflectivity of −40 dB in one cubic meter area at the receiving antenna or the antenna under test (AUT) region far away from transmitter say, at 5.5 m separation. This paper covers the measurement results of three broadband horn antennas which can be used as reference antennas for characterization of other antennas in the chosen frequency range. The entire report will certainly be a guideline for any reader or aspirant who is interested in the development of a similar anechoic chamber and looking for complete intricacies.

2019 TEQIP III Sponsored International Conference on Microwave Integrated Circuits, Photonics and Wireless Networks (IMICPW), 2019

This paper reports the performance of hexagonal patch antenna whose return loss, bandwidth and ga... more This paper reports the performance of hexagonal patch antenna whose return loss, bandwidth and gain are influenced by a four ring square split ring resonator structure printed at the rear side of a 0.508 mm thick Rogers Duroid 5880 substrate board whose dielectric permittivity is 2.2. There are many occasions where gain and bandwidth cannot go high together but the demand is very crucial for the same. In this work HFSS v18.2 was used to design and simulate the entire antenna structure with resonant frequency of 2.5 GHz. The radiating portion is a hexagonal shaped patch of side length of 23.70 mm (λ/5.1), fed by a Co-Planar Waveguide type feed system. The patch structure is adjusted with a small slit to accommodate inset feed for impedance matching. The overall size of the substrate is 93 mm χ 63 mm χ 0. 508 mm. A gain of 7.78 dB is achieved at designed resonance frequency of 2.5 GHz with a lowest return loss of -17.4 dB along with a large bandwidth of 1.54 GHz, and a fractional band...

Progress In Electromagnetics Research C

The aim of this paper is to highlight and elaborate the construction and establishment of a recta... more The aim of this paper is to highlight and elaborate the construction and establishment of a rectangular anechoic chamber (AC) of dimensions 7 m × 4 m × 3 m working from 0.1 GHz to 40 GHz. It is an informative checklist giving an insight on the reckoning of chamber dimensions and selection of appropriate absorbers as per the required specifications. It briefs the key features of validation of an anechoic chamber, namely, shielding effectiveness and reflectivity (quiet zone). It describes the intricacies of the integration of systems such as vector network analyzer (VNA), antenna mounting stands, three-axes motorized antenna rotation control circuitry, and customized software. The validation of the established chamber is accomplished for overall shielding effectiveness of −80 dB and reflectivity of −40 dB in one cubic meter area at the receiving antenna or the antenna under test (AUT) region far away from transmitter say, at 5.5 m separation. This paper covers the measurement results of three broadband horn antennas which can be used as reference antennas for characterization of other antennas in the chosen frequency range. The entire report will certainly be a guideline for any reader or aspirant who is interested in the development of a similar anechoic chamber and looking for complete intricacies.

2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)

2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)

Trends in Sciences

A novel Defected Ground Structure (DGS) is proposed to miniaturize a 2×2 Modified Corporate Feed ... more A novel Defected Ground Structure (DGS) is proposed to miniaturize a 2×2 Modified Corporate Feed Planar Antenna Array (M-CFPA) with a modified corporate feeding network. The DGS altered the surface current distribution and shifted the resonance frequency to the lower side. After running a parametric sweep of length and width of the patch antenna element, achieved the miniaturized antenna array resonating at 2.4 GHz frequency. The proposed antenna array is designed using Rogers/RT Duroid 5,880 ( ) substrate with a thickness of 1.6 mm. The overall dimensions of the proposed Planar Array with DGS (PA-DGS) is 25.2723 % lesser than M-CFPA. The M-CFPA has a peak gain of 11.53 dB with a - 10 dB reflection coefficient bandwidth of 118 MHz. The proposed PA-DGS array exhibits a peak gain of 9.51 dB with 100 MHz -10 dB bandwidth. HIGHLIGHTS One of the major challenges faced in antenna array design is creating an efficient feed network An optimum feed network is designed to miniaturize the ante...

Journal of Physics: Conference Series, 2021

This paper investigates the design and implementation of a novel hybrid metamaterial unit cell to... more This paper investigates the design and implementation of a novel hybrid metamaterial unit cell to improve a beamforming Wi-Fi antenna’s performance. The proposed metamaterial unit cell is created on an FR-4 substrate (εγ = 4.4) and a thickness of 1.6 mm. The metallization height of the unit cell is maintained at 0.035 mm. The designed metamaterial unit cell is simulated using HFSS Ver. 18.2 to verify the double negative behaviour. The unit cell consists of five Split Ring Resonators (SRR’s) at the bottom and a hexagonal ring of six triangles. Initially, a conventional inset fed microstrip patch antenna is designed then an array of the proposed unit cell is created and used as a superstrate to study the performance. A Three Element Antenna Array (TEAA) is designed to operate at 2.4 GHz Wi-Fi band, and the superstrate created out of the proposed unit cell is used to study its effect. Metamaterial superstrate improved the conventional Single Element Antenna (SEA) gain by approximately ...

2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)

Progress In Electromagnetics Research C, 2020

The aim of this paper is to highlight and elaborate the construction and establishment of a recta... more The aim of this paper is to highlight and elaborate the construction and establishment of a rectangular anechoic chamber (AC) of dimensions 7 m × 4 m × 3 m working from 0.1 GHz to 40 GHz. It is an informative checklist giving an insight on the reckoning of chamber dimensions and selection of appropriate absorbers as per the required specifications. It briefs the key features of validation of an anechoic chamber, namely, shielding effectiveness and reflectivity (quiet zone). It describes the intricacies of the integration of systems such as vector network analyzer (VNA), antenna mounting stands, three-axes motorized antenna rotation control circuitry, and customized software. The validation of the established chamber is accomplished for overall shielding effectiveness of −80 dB and reflectivity of −40 dB in one cubic meter area at the receiving antenna or the antenna under test (AUT) region far away from transmitter say, at 5.5 m separation. This paper covers the measurement results of three broadband horn antennas which can be used as reference antennas for characterization of other antennas in the chosen frequency range. The entire report will certainly be a guideline for any reader or aspirant who is interested in the development of a similar anechoic chamber and looking for complete intricacies.

2019 TEQIP III Sponsored International Conference on Microwave Integrated Circuits, Photonics and Wireless Networks (IMICPW), 2019

This paper reports the performance of hexagonal patch antenna whose return loss, bandwidth and ga... more This paper reports the performance of hexagonal patch antenna whose return loss, bandwidth and gain are influenced by a four ring square split ring resonator structure printed at the rear side of a 0.508 mm thick Rogers Duroid 5880 substrate board whose dielectric permittivity is 2.2. There are many occasions where gain and bandwidth cannot go high together but the demand is very crucial for the same. In this work HFSS v18.2 was used to design and simulate the entire antenna structure with resonant frequency of 2.5 GHz. The radiating portion is a hexagonal shaped patch of side length of 23.70 mm (λ/5.1), fed by a Co-Planar Waveguide type feed system. The patch structure is adjusted with a small slit to accommodate inset feed for impedance matching. The overall size of the substrate is 93 mm χ 63 mm χ 0. 508 mm. A gain of 7.78 dB is achieved at designed resonance frequency of 2.5 GHz with a lowest return loss of -17.4 dB along with a large bandwidth of 1.54 GHz, and a fractional band...

Progress In Electromagnetics Research C

The aim of this paper is to highlight and elaborate the construction and establishment of a recta... more The aim of this paper is to highlight and elaborate the construction and establishment of a rectangular anechoic chamber (AC) of dimensions 7 m × 4 m × 3 m working from 0.1 GHz to 40 GHz. It is an informative checklist giving an insight on the reckoning of chamber dimensions and selection of appropriate absorbers as per the required specifications. It briefs the key features of validation of an anechoic chamber, namely, shielding effectiveness and reflectivity (quiet zone). It describes the intricacies of the integration of systems such as vector network analyzer (VNA), antenna mounting stands, three-axes motorized antenna rotation control circuitry, and customized software. The validation of the established chamber is accomplished for overall shielding effectiveness of −80 dB and reflectivity of −40 dB in one cubic meter area at the receiving antenna or the antenna under test (AUT) region far away from transmitter say, at 5.5 m separation. This paper covers the measurement results of three broadband horn antennas which can be used as reference antennas for characterization of other antennas in the chosen frequency range. The entire report will certainly be a guideline for any reader or aspirant who is interested in the development of a similar anechoic chamber and looking for complete intricacies.