Abstract
The minimum-phase property of a broadband asymmetric TEM horn is investigated on and off the boresight axis. It is found that the transfer function conforms very closely to the minimum-phase criterion on boresight, but that off axis there is a significant deviation in the H-plane and in the E-plane at angles above the ground plane, but not below. This behavior can be qualitatively explained in terms of a simple model based on rays representing major sources of radiation. In general, the frequency-domain, minimum-phase criterion will be satisfied only if the time-domain field from the strongest radiation source is the first to arrive at the observation point.
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McLean, J.S., Medina, A., Sutton, R., Foltz, H. (2014). Directional Dependence of the Minimum-Phase Property of the TEM Horn Transfer Function. In: Sabath, F., Mokole, E. (eds) Ultra-Wideband, Short-Pulse Electromagnetics 10. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9500-0_16
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DOI: https://doi.org/10.1007/978-1-4614-9500-0_16
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