Transient UWB antenna characterization in GTEM cells

This contribution presents a novel measurement approach to characterize the pulse reception behavior of UWB antennas using a GTEM cell. By evaluating the respective reception properties the transmit characteristics are calculated via the Lorentz´s reciprocity theorem. The cell is excited at its feeding port by an UWB pulse covering a frequency range up to 10 GHz. The antenna is placed inside the testing volume. Due to the fact, that pure TEM propagation predominates within a distinct time interval, electrical small antennas can be characterized with a negligible influence of either field distortion or pulse dispersion effects. Hence, the time-gated receive signal of the antenna can be used to compute the impulse response directly via deconvolution of the incident electric field and the voltage at the antenna´s feeding port.