Spectral Formulation for the Solution of Full-Wave Scattering from a Conducting Wedge Tipped with a Corrugated Cylinder

Journal Article · Tue Nov 29 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3659909· OSTI ID:21612253

Polycarpou, A C ^[1]; Christou, M A ^[2]

---

1. Department of Electrical and Computer Engineering, University of Nicosia, 46, Makedonitissas Ave. P.O. Box 24005, 1700 Nicosia (Cyprus)
2. Department of Mathematics, University of Nicosia, 46, Makedonitissas Ave. P.O. Box 24005, 1700 Nicosia (Cyprus)

A spectral mode-matching technique is formulated to solve for the full-wave scattering of a corrugated cylinder-tipped wedge in the presence of an impressed electric or magnetic line source. Asymptotic approximations of large-order Bessel or Henkel functions for a fixed argument were introduced in order to overcome numerical difficulties in their regular series expansions. The corrugations on the conducting cylinder have the shape of annular sectors. The primary objective of this work is to investigate the impact of corrugations on the scattered field in the shadow region of the structure. An optimally designed corrugated cylinder placed at the tip of a conducting wedge can effectively suppress electromagnetic scattering in the shadow region. Obtained numerical results using the proposed approach prove the above concept. These results were validated against numerical data obtained using a nodal finite element method. The aim of this research is to utilize these corrugated tips in horn antenna design for the reduction of side-lobe level and the shaping of the respective E-plane radiation pattern.

• OSTI ID: 21612253
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1404; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTENNAS
APPROXIMATIONS
ASYMPTOTIC SOLUTIONS
CALCULATION METHODS
CYLINDERS
DIFFERENTIAL EQUATIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EQUATIONS
EQUIPMENT
FINITE ELEMENT METHOD
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
RADIATIONS
SCATTERING
SERIES EXPANSION
WAVE EQUATIONS