Ultra-Wideband Antennas and Propagation. Volume 2: Antenna Measurements and Signal Processing.

TL;DRAbstract

Abstract : In Volume 1 of this report we described the design and predictions for two reflector and lens Impulse Radiating Antennas (IRAs), with 23-centimeter diameters. In this report (Volume 2) we complete the measurements of those antennas, and the data is processed and compared to theory. Antenna measurements were obtained using the two-antenna technique. Using signal processing, we extracted the one-way antenna response. The boresight step response in transmission (impulse response in reception) was measured to be as fast as 25 Ps, Full Width Half Max (FWHM) for the reflector IRA, and 21 Ps for the lens IRA. The impulse response on boresight for the reflector antenna has an impulse area of 87% of the theoretically predicted value, and that for the lens is 101% of the predicted value. The angular dependence of the antennas was measured, and the half-power points for both antenna types occurred approximately four degrees off-axis for step-function excitation. The dielectric-filled l

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