Abstract

This paper presented the design of a side-feeding resistance-loaded antipodal Vivaldi antenna. The dimensions of the antenna have been simulated and analyzed with highfrequency electromagnetic simulation software HFSS. A sidefeeding antipodal Vivaldi antenna for 0.38~4.8GHz was designed and fabricated. And its impedance and radiation characteristics have been measured. The results show that the Vivaldi antenna can match well within the 0.38-4.8GHz and has a good radiating directivity. Compared with traditional Vivaldi antenna, a side-feeding and resistance-loaded antipodal antenna can reduce the antenna's size effectively on the one hand and an increase of the parasitic patch can improve antenna's gain on the other hand. Keywords-antipodal Vivaldi antenna;side-feeding;resistanceloaded

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