volume | PIER Journals

Abstract

In this work FSS (Frequency Selective Surface) based broadband, compact and improved gain microstrip patch antenna with defected ground structure for WLAN and WiMAX applications are proposed. A comparative study has been done by the proposed antenna. It is designed on a Rogers RT/duroid substrate (dielectric constant 2.2, thickness 1.6 mm, and loss tangent 0.0009). The structure of the rectangular patch is 0.10λ₀×0.18λ₀ at 5.5 GHz, where λ₀ is the free space wavelength. The lateral ground plane dimensions are 0.29λ₀×0.27λ₀×0.03λ₀ mm³. A patch type FSS is loaded under the ground plane with separation 10 mm from the antenna. Broad frequency band is obtained along with three resonant frequencies at 5.25 GHz, 6.7 GHz and 11.05 GHz. The achieved frequency band and peak gain are 6.79 GHz (4.93 GHz-11.72 GHz) and 8.82 dBi, respectively. Maximum size reduction of 86% is achieved. The designed antenna is simulated, fabricated and measured to verify the results. The measured results are in good agreement with simulated data. It may be applied in WLAN, WiMAX 5.5/5.8 GHz wireless communication and X band applications.

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Dr. Kalyan Mondal

Dr. Debasree Chanda Sarkar

Dr. Partha Pratim Sarkar