### Abstract

The uniform theory of diffraction (UTD) plus an imposed edge diffraction extension is used to predict the backscatter cross sections of dihedral corner reflectors which have right, obtuse, and acute included angles. The UTD allows individual backscattering mechanisms of the dihedral corner reflectors to be identified and provides good agreement with experimental cross-section measurements in the azimuthal plane. Multiply reflected and diffracted fields of up to third-order are included in the analysis for both horizontal and vertical polarizations. The coefficients of the uniform theory of diffraction revert to those of the geometrical theory of diffraction (GTD) in far-field cross-section analyses, but finite cross sections can be obtained everywhere by considering mutual cancellation of diffractions from parallel edges. Analytic calculations are performed using UTD coefficients; hence the accuracy required in angular measurements is more critical as the distance increases. The common far-field approximation that all rays to the observation point are parallel is too gross an approxiation for the angular parameters in the UTD coefficients in the far field.

Original language | English (US) |
---|---|

Pages (from-to) | 1235-1247 |

Number of pages | 13 |

Journal | IEEE Transactions on Antennas and Propagation |

Volume | AP-35 |

Issue number | 11 |

State | Published - 1800 |

### Fingerprint

### ASJC Scopus subject areas

- Computer Networks and Communications
- Electrical and Electronic Engineering

### Cite this

*IEEE Transactions on Antennas and Propagation*,

*AP-35*(11), 1235-1247.

**DIHEDRAL CORNER REFLECTOR BACKSCATTER USING HIGHER ORDER REFLECTIONS AND DIFFRACTIONS.** / Griesser, Timothy; Balanis, Constantine.

Research output: Contribution to journal › Article

*IEEE Transactions on Antennas and Propagation*, vol. AP-35, no. 11, pp. 1235-1247.

}

TY - JOUR

T1 - DIHEDRAL CORNER REFLECTOR BACKSCATTER USING HIGHER ORDER REFLECTIONS AND DIFFRACTIONS.

AU - Griesser, Timothy

AU - Balanis, Constantine

PY - 1800

Y1 - 1800

N2 - The uniform theory of diffraction (UTD) plus an imposed edge diffraction extension is used to predict the backscatter cross sections of dihedral corner reflectors which have right, obtuse, and acute included angles. The UTD allows individual backscattering mechanisms of the dihedral corner reflectors to be identified and provides good agreement with experimental cross-section measurements in the azimuthal plane. Multiply reflected and diffracted fields of up to third-order are included in the analysis for both horizontal and vertical polarizations. The coefficients of the uniform theory of diffraction revert to those of the geometrical theory of diffraction (GTD) in far-field cross-section analyses, but finite cross sections can be obtained everywhere by considering mutual cancellation of diffractions from parallel edges. Analytic calculations are performed using UTD coefficients; hence the accuracy required in angular measurements is more critical as the distance increases. The common far-field approximation that all rays to the observation point are parallel is too gross an approxiation for the angular parameters in the UTD coefficients in the far field.

AB - The uniform theory of diffraction (UTD) plus an imposed edge diffraction extension is used to predict the backscatter cross sections of dihedral corner reflectors which have right, obtuse, and acute included angles. The UTD allows individual backscattering mechanisms of the dihedral corner reflectors to be identified and provides good agreement with experimental cross-section measurements in the azimuthal plane. Multiply reflected and diffracted fields of up to third-order are included in the analysis for both horizontal and vertical polarizations. The coefficients of the uniform theory of diffraction revert to those of the geometrical theory of diffraction (GTD) in far-field cross-section analyses, but finite cross sections can be obtained everywhere by considering mutual cancellation of diffractions from parallel edges. Analytic calculations are performed using UTD coefficients; hence the accuracy required in angular measurements is more critical as the distance increases. The common far-field approximation that all rays to the observation point are parallel is too gross an approxiation for the angular parameters in the UTD coefficients in the far field.

UR - http://www.scopus.com/inward/record.url?scp=0023670446&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0023670446&partnerID=8YFLogxK

M3 - Article

VL - AP-35

SP - 1235

EP - 1247

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

SN - 0018-926X

IS - 11

ER -