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Abstract

In this paper, a Quadband Octagon Patch Antenna is designed whose operating frequencies are 20.22 GHz, 23.64 GHz, 27.35 GHz, 28 GHz, 28.37 GHz which achieved return losses of -19.67 dB, -19.14 dB, -19.66 dB, -19.04 dB, -19.04 dB, -20.41 dB and gain of 6.1 dB, respectively. The substrate employed in this antenna is FR4, which features a dielectric constant value 4.4 and a loss tangent value of 0.002. With a radiation efficiency of 90.85%. This antenna is small, measuring only 15 × 25 × 1.6 mm³ dimensions. Multiple slots of different lengths are inserted in an antenna to form a 5G Quadband Octagon Patch Antenna in order to accommodate more operating frequencies. Later, a 2*2 MIMO octagon patch antenna having a 3.6 mm radius, 50 × 30 × 1.6 mm³ of dimensions, 4.4 dielectric constant, and 1.6 mm thickness with defective ground structure is designed. Here this single quad band antenna was turned to a broadband MIMO antenna by means of a defective ground structure.

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Mr. Katari Manjunath

Prof. Sanam Narayana Reddy