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Your search keyword '"Gulam Nabi Alsath, M."' showing total 6 results
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6 results on '"Gulam Nabi Alsath, M."'

3. Miniaturized Band Stop FSS Using Convoluted Swastika Structure

Author

Sridhar Bilvam, Malathi Kanagasabai, Sanjay Baisakhiya, Ramprabhu Sivasamy, and Gulam Nabi Alsath M

Subjects
Optics, Materials science, business.industry, 020208 electrical & electronic engineering, Electromagnetic shielding, 0202 electrical engineering, electronic engineering, information engineering, Structure (category theory), 020206 networking & telecommunications, 02 engineering and technology, Electrical and Electronic Engineering, business
Abstract

This paper presents a miniaturized frequency selective surface (FSS) with stop band characteristics at the resonant frequency of 5.12 GHz. The unit cell size of the proposed FSS design is in the order of 0.095 λ×0.095 λ. The proposed unit cell is obtained by convoluting the arms of the basic swastika structure. The design provides fractional bandwidth of 9.0 % at the center frequency of 5.12 GHz in the 20 dB reference level of insertion loss. The symmetrical aspect of the design delivers identical response for both transverse electric (TE) and transverse magnetic (TM) modes thereby exhibiting polarization independent operation. The miniaturized design provides good angular independency for various incident angles. The dispersion analysis is done to substantiate the band stop operation of the convoluted swastika FSS. The proposed FSS is fabricated and its working is validated through measurements.

Published
2016

6. Polarisation diverse multiple input-multiple output antenna with enhanced isolation.

Author

Sarma, Aswathy K., Arun, Henridass, Kanagasabai, Malathi, Velan, Sangeetha, Raviteja, Chinnambeti, and Gulam Nabi Alsath, M.

Subjects
POLARIZATION (Electricity), ANTENNAS (Electronics), BANDWIDTH allocation, SWASTIKAS, VALUE engineering
Abstract

In this article, two-element monopole multiple input-multiple output (MIMO) antenna with polarisation diversity for 4G and other applications has been presented. The designed antenna covers 16% (1701-2001 MHz) of bandwidth around the design frequency (1850 MHz) which includes both DCS-1800 and DCS-1900 bands. The two antennas are placed orthogonally and symmetrically with edge-to-edge spacing of 5.5 mm (λ0/30). With the placement of interconnected swastika-shaped resonator between the two monopole antennas, there is an isolation enhancement of 60 dB thus reducing the envelope correlation coefficient value ranging from 0.016 to 6.12 × 10-10 and improving the diversity gain ranging from 9.9 to 10 dB within the -10 dB bandwidth. A prototype has been fabricated and validated using measurements. [ABSTRACT FROM AUTHOR]

Published
2015
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