A miniaturized microstrip patch antenna with multifrequency operation is proposed in this paper. The effect of rectangular notch loading on microstrip patch is investigated in this paper. Two rectangular notches are introduced on the radiating patch and multifrequency response has been obtained. The first resonant frequency has been drastically reduced to 3.44 GHz due to incorporation of rectangular notches. Compared to the conventional rectangular patch antenna, the proposed antenna can achieve reduction in patch size up to 64.3% with a frequency ratio of about 1.80. The proposed antenna resonates at 3. 44, 4.72, and 6.32 GHz in microwave S and C band. The characteristic parameters of the proposed antenna are investigated by method of momentbased IE3D software. Theoretical results have been validated by measured results. Good agreement is observed between the theoretical and practical results. The proposed antenna could be promising for a number of applications such as Wi-Max, INSAT, and radar communications.
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Das et al. (2017) studied this question.
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