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The numerical analysis and experimental characterization of an ultra-wideband (UWB) probe designed for near-field target detection and imaging are reported. The configuration, based on transverse electromagnetic (TEM) horn, has two curved launching planes terminated with resistively loaded feedback loop and a U-shaped plane serving as the reflector. Resistive loads have been added to improve the performance...
A coaxial-fed dual-band bow-tie antenna with two arms printed on top and bottom of dielectric substrate of epsivgamma = 2.2 is proposed to operate at both the CDMA/GSM band ranging from 800-960 MHz and the 3G/WLAN band ranging from 1.7-2.5 GHz. The two arms of the bow-tie are overlapped to tune the two operation bands, and asymmetrical arms are designed to generate beam tilt as required in 3G/WLAN...
The time sequence control scheme of exciting pulses for ultra-wideband (UWB) antenna array is investigated in consideration of the angle-dependent pulse distortion in UWB short pulse radiation. For a linear UWB antenna array with 5 rectangular aperture antennas as elements, three different time sequence control scheme, viz. the conventional initial-range delay scheme, the peak-range delay scheme,...
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