Open AccessInterval‐based analysis of pattern distortions in reflector antennas with bump‐like surface deformations
Author(s) -
Rocca Paolo,
Manica Luca,
Massa Andrea
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2014.0162
Subject(s) - beamwidth , reflector (photography) , surface (topology) , power (physics) , interval (graph theory) , effective radiated power , parabolic reflector , sensitivity (control systems) , mathematics , geometry , optics , interval arithmetic , acoustics , mathematical analysis , physics , computer science , antenna (radio) , telecommunications , electronic engineering , engineering , combinatorics , light source , quantum mechanics , bounded function
The effects on the radiated power pattern of localised defects (also called ‘bump‐like surface deformations’) in the surface of reflector antennas are studied with an innovative approach based on interval analysis (IA). By exploiting the features of the IA and the rules of the arithmetic for intervals, closed‐form relationships for the bounds (i.e. upper and lower values) of the power pattern are derived once bump‐like deformations with known locations and sizes, but unknown depths, are present. The sensitivity of the nominal power pattern and its features (i.e. sidelobe level, half‐power beamwidth and power peak) are analysed in the case of both single and multiple localised defects. Representative results from several numerical tests concerned with different sizes, locations and number of the surface deformations are reported and discussed to give the interested reader some insights on the capabilities and the effectiveness of the proposed IA‐based approach.