Localized wave representations of acoustic and electromagnetic radiation

Article Abstract:

The studies into localized wave (LW) transmission have resulted in physics, mathematics and engineering issues surfacing regarding questions of causality, localization, space-time field representations, complex source interpretations of beam fields and time domain antenna effects. Pulse-driven, independently addressable arrays have been constructed so that nonstandard methods of wave energy transmission can be investigated. Different signals can be transmitted from different locations in the array so that spectral features can be shaded to be seen by the array, as well as the amplitudes, when independently addressable arrays are implemented. LW pulse-driven arrays produce better beam transmission, maintaining shapes and amplitudes, better than monochromatic, continuous waves, such as Gaussian beams.

Electromagnetic radiation, Wave propagation, Continuous Simulation, Acoustics, Arrays, Local Variables

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Single reference, three target calibration and error correction for monostatic, polarimetric free space measurements

Article Abstract:

A single reference calibration technique for monostatic, polarimetic free space measurements, in which only one calibration standard is relevant for absolute amplitude and phase calibration, is introduced and measured. Other standards have only relative character in this technique. Previously developed procedures, including remote sensing, are not appropriate for high precision antenna or radar cross section measurements and are somewhat complicated. This procedure will improve antenna and radar cross section measurements. Reliable, calibrated cross-polarization purity is possible as well as accurate co- and cross-polarization measurement. This technique also improves electromagnetic compatibility measurements through its single reference calibration.

Linear programming, Calibration, Radar, Performance Measurement, Radar Systems, Antennas, Error-Correcting Codes

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