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Sub strate Integrated Waveguide (SIW) antennas are considered as main radiators for RF and microwave wireless systems due to their low profile, low cost and soft integration with the other devices. The gain of a SIW patch antenna may b e enhanced using different techn iques such as Artificial Neural Networks (ANN) b y modifying the antenna's geometry with high efficiency comparing to electromagnetic techniques that take more time. This paper describ es a novel structure of a circular SIW patchdoi:10.12928/telkomnika.v16i1.8011 fatcat:5npaqkekivdgjmlrc6isigh4ha