This book presents contributions of deep technical content and high scientific quality in the are... more This book presents contributions of deep technical content and high scientific quality in the areas of electromagnetic theory, scattering, UWB antennas, UWB systems, ground penetrating radar (GPR), UWB communications, pulsed-power generation, time-domain computational electromagnetics, UWB compatibility, target detection and discrimination, propagation through dispersive media, and wavelet and multi-resolution techniques. Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. Like previous books in this series, Ultra-Wideband Short-Pulse Electromagnetics 10 serves as an essential reference for scientists and engineers working in these applications areas.
The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The anten... more The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The antenna is simulated in both the time and the frequency domains. The radiation pattern has been observed for various values of ka signifying all the ranges of operation of the antenna. It is seen that for large values of ka the radiation pattern is limited within an angular sector determined by the cone angles of the bicone. The transient radiated and received responses of the antenna for wideband operation have been obtained. The waveshapes of the transient fields bear a certain relationship with the shape of the input pulse.
To understand the target-like artifacts in radar returns called sea spikes 1 that are induced by ... more To understand the target-like artifacts in radar returns called sea spikes 1 that are induced by ocean scatter,2 the WIPL-D3 and WIPL-DP4 electromagnetics codes are used to calculate monostatic and bistatic radar cross sections (RCSs) of a trihedral comer reflector at 1.5, 3.8, and 7 GHz for vertically and horizontally polarized fields. These computations are part of a larger effort to provide theoretical comparisons for recent scatter data from a 1-m trihedral reflector that was collected over 1.9 to 11.5 GHz in the open ocean with a short-pulse ultrawideband (UWB) system. Over the last eight years, this UWB experimental radar, called the microwave microscope (MWM), has been used in a series of measurements at the Atlantic Underwater Test and Experiment Center (AUTEC) in the Bahamas to investigate the low-elevation (grazing angles less than 4°)scatter of RF signals from the open ocean in an attempt to understand and mitigate the sea-spike phenomenon.
An ultrawideband, dual polarized, dual waveform, instrumentation radar has been described and exp... more An ultrawideband, dual polarized, dual waveform, instrumentation radar has been described and experimental measurements of fixed test objects and of a disturbed sea surface have been presented. The two cm range resolution of the system separates the contributions of individual scattering features on the ocean surface and is providing an increased understanding of the composition and behavior of radar sea clutter at low grazing angles. The experimental results have emphasized fundamental differences in the character of the clutter as a function of both polarization and radar resolution
The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The anten... more The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The antenna is simulated in both the time and the frequency domains. The radiation pattern has been observed for various values of ka signifying all the ranges of operation of the antenna. It is seen that for large values of ka the radiation pattern is limited within an
ABSTRACT This paper develops a data model and corresponding imaging operation for multistatic pol... more ABSTRACT This paper develops a data model and corresponding imaging operation for multistatic polarimetric radar. The mathematical model describes the processes of radiation from a transmitting antenna, scattering from a moving target, and reception at a receiving antenna. A bistatic scattering matrix based on physical optics and the fast-time Doppler effects of a moving target are incorporated. Simulations are presented that consider a moving target in multiple transmitter and receiver configurations with multiple transmit waveforms and polarization schemes.
ABSTRACT This paper advances the theory for multistatic imaging of non-interacting moving targets... more ABSTRACT This paper advances the theory for multistatic imaging of non-interacting moving targets through the development of a vector radar data model for multiple transmitters and receivers and accompanying imaging operations for visualizing multistatic radar data in a common reference frame. The electromagnetic data model incorporates polarization and antenna effects, and the transmit waveform and scattering behavior of the target are left arbitrary for greater flexibility to model multiple scenarios. Two imaging operations are derived that combine the data collected at each receiver, first assuming that the contributions from all transmitters in the scene are separable and then assuming that the contributions from all transmitting antennas cannot be separated. The data model and imaging operations are used to simulate multiple antenna geometries and transmission schemes. Images produced from simulated data exhibit angle- and polarization-dependent scattering behavior consistent with the antenna geometry, transmit waveforms, and target specific to each scenario.
This book presents contributions of deep technical content and high scientific quality in the are... more This book presents contributions of deep technical content and high scientific quality in the areas of electromagnetic theory, scattering, UWB antennas, UWB systems, ground penetrating radar (GPR), UWB communications, pulsed-power generation, time-domain computational electromagnetics, UWB compatibility, target detection and discrimination, propagation through dispersive media, and wavelet and multi-resolution techniques. Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. Like previous books in this series, Ultra-Wideband Short-Pulse Electromagnetics 10 serves as an essential reference for scientists and engineers working in these applications areas.
The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The anten... more The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The antenna is simulated in both the time and the frequency domains. The radiation pattern has been observed for various values of ka signifying all the ranges of operation of the antenna. It is seen that for large values of ka the radiation pattern is limited within an angular sector determined by the cone angles of the bicone. The transient radiated and received responses of the antenna for wideband operation have been obtained. The waveshapes of the transient fields bear a certain relationship with the shape of the input pulse.
To understand the target-like artifacts in radar returns called sea spikes 1 that are induced by ... more To understand the target-like artifacts in radar returns called sea spikes 1 that are induced by ocean scatter,2 the WIPL-D3 and WIPL-DP4 electromagnetics codes are used to calculate monostatic and bistatic radar cross sections (RCSs) of a trihedral comer reflector at 1.5, 3.8, and 7 GHz for vertically and horizontally polarized fields. These computations are part of a larger effort to provide theoretical comparisons for recent scatter data from a 1-m trihedral reflector that was collected over 1.9 to 11.5 GHz in the open ocean with a short-pulse ultrawideband (UWB) system. Over the last eight years, this UWB experimental radar, called the microwave microscope (MWM), has been used in a series of measurements at the Atlantic Underwater Test and Experiment Center (AUTEC) in the Bahamas to investigate the low-elevation (grazing angles less than 4°)scatter of RF signals from the open ocean in an attempt to understand and mitigate the sea-spike phenomenon.
An ultrawideband, dual polarized, dual waveform, instrumentation radar has been described and exp... more An ultrawideband, dual polarized, dual waveform, instrumentation radar has been described and experimental measurements of fixed test objects and of a disturbed sea surface have been presented. The two cm range resolution of the system separates the contributions of individual scattering features on the ocean surface and is providing an increased understanding of the composition and behavior of radar sea clutter at low grazing angles. The experimental results have emphasized fundamental differences in the character of the clutter as a function of both polarization and radar resolution
The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The anten... more The wide-angle discone antenna terminated by a truncated spherical cap is investigated. The antenna is simulated in both the time and the frequency domains. The radiation pattern has been observed for various values of ka signifying all the ranges of operation of the antenna. It is seen that for large values of ka the radiation pattern is limited within an
ABSTRACT This paper develops a data model and corresponding imaging operation for multistatic pol... more ABSTRACT This paper develops a data model and corresponding imaging operation for multistatic polarimetric radar. The mathematical model describes the processes of radiation from a transmitting antenna, scattering from a moving target, and reception at a receiving antenna. A bistatic scattering matrix based on physical optics and the fast-time Doppler effects of a moving target are incorporated. Simulations are presented that consider a moving target in multiple transmitter and receiver configurations with multiple transmit waveforms and polarization schemes.
ABSTRACT This paper advances the theory for multistatic imaging of non-interacting moving targets... more ABSTRACT This paper advances the theory for multistatic imaging of non-interacting moving targets through the development of a vector radar data model for multiple transmitters and receivers and accompanying imaging operations for visualizing multistatic radar data in a common reference frame. The electromagnetic data model incorporates polarization and antenna effects, and the transmit waveform and scattering behavior of the target are left arbitrary for greater flexibility to model multiple scenarios. Two imaging operations are derived that combine the data collected at each receiver, first assuming that the contributions from all transmitters in the scene are separable and then assuming that the contributions from all transmitting antennas cannot be separated. The data model and imaging operations are used to simulate multiple antenna geometries and transmission schemes. Images produced from simulated data exhibit angle- and polarization-dependent scattering behavior consistent with the antenna geometry, transmit waveforms, and target specific to each scenario.
Skip to Main Content. IEEE.org | IEEE Xplore Digital Library | IEEE Standards Association | Spect... more Skip to Main Content. IEEE.org | IEEE Xplore Digital Library | IEEE Standards Association | Spectrum Online | More IEEE Sites. IEEE Xplore Digital Library. Search Term(s). Advanced Search | Preferences | Search Tips. ...
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