Accession Number:

ADA621245

Title:

A Huygens Surface Approach to Antenna Implementation in Near-Field Radar Imaging System Simulations

Descriptive Note:

Final rept. for period ending Jun 2014

Corporate Author:

ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE

Personal Author(s):

• Dogaru, Traian
• Liao, DaHan

Report Date:

2015-08-01

Pagination or Media Count:

36.0

Abstract:

This study introduces a new hybrid approach to implementing the radar transmitters and receivers in the NAFDTD simulation software, by replacing the physical antennas with equivalent currents sheets on a surrounding closed surface. After validating the code for several simple scenarios, we present a large-scale simulation in the presence of multiple targets embedded in a rough ground environment. The model consists of an ultra-wideband, forward-looking radar imaging system, equipped with a multi-static antenna array and mounted on a forward-moving platform. The resulting scattering data from the 2-dimensional synthetic aperture are used in creating maps of the terrain in front of the platform via a time-reversal technique. We consider several target types, placed on the ground surface or buried, and clutter from rough surfaces with different statistics.

Descriptors:

• *FINITE DIFFERENCE TIME DOMAIN
• *NEAR FIELD
• *RADAR IMAGES
• *RADAR TRANSMITTERS
• *RECEIVERS
• ANTENNA ARRAYS
• BROADBAND
• CLUTTER
• COMPUTER PROGRAMS
• COMPUTERIZED SIMULATION
• EMBEDDING
• FORWARD LOOKING
• HYBRID SYSTEMS
• MULTIPLE TARGETS
• SURFACE ROUGHNESS
• TWO DIMENSIONAL

Subject Categories:

• Active and Passive Radar Detection and Equipment
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE