The Beam Patterns of UWB Radars with Uniform Linear Tx and Rx Antenna Arrays

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Authors
  1. Hung, E.K.L.
  2. Gauthier, S.M.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
This report presents a study of the energy density patterns, or beam patterns, of ultrawideband (UWB) short-pulse radars with transmit and receive antenna arrays. These patterns include the patterns of transmit array beams in space as well as the patterns at the receive array beamformer output. The pattern at the receive array beamformer output verifies the generally accepted property that the range resolution of UWB radars is close to 0.5cDt, where c is the speed of light in the propagation medium and Dt is the pulse width. It also shows that the angular resolution of targets in UWB radars is close to that of narrowband radars operating at the same central frequency as the UWB signal. UWB short-pulse radars usually transmit signals with pulse widths less than 1.0 nanosecond to detect targets. The short pulse widths give these radars many desirable properties the standard narrowband radars don't have. They include high accuracy in range measurements, improved target classification in types and classes, reduced clutter and multipath interference in the received echo signal, improved immunity to narrowband jamming and low probability of detection radio frequency signatures.

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Keywords
UWB (Ultra WideBand);Nanosecond pulses;Radar pulses;Ultrawideband receiver;Ultrawideband transmitter;Transmit and receive antenna arrays;Energy density patterns;Short-pulse radar
Report Number
DRDC-OTTAWA-TM-2002-168 — Technical Memorandum
Date of publication
01 Dec 2002
Number of Pages
56
DSTKIM No
CA022007
CANDIS No
518814
Format(s):
Hardcopy;CD ROM

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