A half circle also acts as a similar reflector. A corner reflector is two flat surfaces joining together to create a 90° angle. Corner reflectors can be surprisingly small, yet present a large reflection back to the sensor.Certain objects are prone to causing corner reflections. These types of detections are the result of reflectors present in the environment. Sometimes when using an ultrasonic sensor, users experience detection of unwanted objects that appear outside the expected beam pattern. Illustration 1: Two common shapes of corner reflectors. Spencer, Optical theory of the corner reflector, MIT Radiation Laboratory Report 433, Cambridge MA, 1944.Corner Reflectors Can Cause Surprise Clutter Yu, High frequency scattering from trihedral comer reflectors and other benchmark targets: SBR versus experiment, IEEE Trans. Currie (ed.), Artech House, Norwood, 1989, pp. Trebits, Radar cross section, in Radar Reflectivity Measurement: Techniques & Applications, N. Sarkar, Preliminary calculated scatter from trihedral comer reflector with WIPL-D, in 20th Annual Review of Progress in Applied Computational Electromagnetics, April 19–23, Syracuse, NY, 2004. Peters, Passive bistatic radar enhancement devices, Proc. Chiu, Optimum comer reflectors for calibration of imaging radars, IEEE Trans. Bachman, Radar Targets, Lexington Books, Lexington, 1982, pp. Card, Development of a parallel scene generation electromagnetic modeling tool, in 20th Annual Review of Progress in Applied Computational Electromagnetics, April 19–23, Syracuse, NY, 2004.Ĭ.
#Trihedral reflector software#
Sarkar, WIPL-D: Electromagnetic Modeling of Composite Metallic and Dielectric Structures- Software and User’s Manual, Artech House, Norwood, 2000.Ĭ. Skolnik (ed.), McGraw-Hill, New York, 1990.ī. Wetzel, Sea clutter, in Radar Handbook, Ch. Tomas, Dual frequency measurements of ocean forward scatter with an ultrawideband radar, in Proceedings of the 2001 IEEE Radar Conference, May 1–3, Atlanta GA, 2001, pp. This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors.
#Trihedral reflector series#
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. 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. To understand the target-like artifacts in radar returns called sea spikes 1 that are induced by ocean scatter, 2 the WIPL-D 3 and WIPL-DP 4 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.
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