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An extremely wide-band tightly coupled dipole antenna array (TCDA) is presented. A novel balun is developed with a spoof surface plasmon polariton (SSPP) structure and a RC resonant circuits to achieve impedance matching and a conversion from unbalanced dipole feeding to balanced feeding. According to the simulation, the proposed TCDA demonstrates a remarkable 60: 1 bandwidth (0. 08GHz-4. 83GHz) with VSWR0. 03{{ }}₋₎ₖ (where {{ }}₋₎ₖ is the wavelength at the lowest frequency of operation, 80 MHz). The final array design consists of 12 dipole unit cells arranged in a one-dimensional configuration.
Ying et al. (Mon,) studied this question.
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