Experimental Demonstration of Highly Localized Pulses (X Waves) at Microwave Frequencies
Journal Article - Open Access
NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States
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A device that radiates transverse magnetic Bessel beams in the radiative near field is reported. The cone angle of the emitted radiation remains constant over a wide frequency range 18-30 GHz, allowing highly localized pulses X waves to be generated under a broadband excitation. The design process, based on ray optics, is discussed. Both frequency and time domain experimental results for a prototype are presented. The measured fields show close agreement with simulation results, and demonstrate the radiators ability to emit X waves within its nondiffracting range.