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Study on the Radiation Mechanism and Design of a TEM Horn Antenna

Chinchu G. Nair, Prof. A.K. Prakash, Mr. KuruvillaGeorge

Antenna is a device that can transmit or receive radio waves. TEM horn antenna is a wideband antenna having many applications in fields such as EMI testing, radar, UWB communication etc. This antenna consists of two triangular metal plates and a feeding structure. Although the shape of the antenna resembles to a horn antenna the radiation mechanism is different from that of a typical horn antenna. Also, horn antenna differs from TEM horn in terms of its inability to support TEM mode of propagation. Here, we conduct a study on the basic radiation mechanism of TEM horn antenna. This antenna can be viewed as a parallel plate transmission line. The design considerations of this antenna are also discussed. Simulation of a TEM horn antenna according to the design is implemented in HFSS and the results are provided.