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Directivity plot using the Rogers RT Duroid 5880 substrate for the range of −180° to +180°. The maximum directivity and the normalized directivity for all of the modes are 6.86 dB with 24° and 7°, 6.84 dB with 15°, 25°, 14°, and 4.47 dB with 32° and 4.74 dB with 29°.
