Title :
A rigorous integral approach for conductor losses modelling in RLSA antennas
Author :
Mazzinghi, A. ; Freni, A. ; Albani, A.
Author_Institution :
Dept. of Electron. & Telecommun., Univ. of Florence, Florence, Italy
Abstract :
This paper presents a rigorous but efficient Method of Moments (MoM) formulation for the analysis of Radial Line Slot Array (RLSA) antennas, which includes the finite conductivity of metals. First, by using both equivalence and reciprocity theorems, effective magnetic currents are defined on each slot aperture, instead of standard electric and magnetic equivalent currents. This choice halves the number of unknowns of the MoM linear system, still preserving the rigor of the electromagnetic formulation. Next, proper Green´s functions accounting for the finite conductivity of metals are derived analytically and used in the MoM admittance matrix expressions. A few RLSA realizations are analyzed to investigate the effect of ohmic losses in a practical antenna design.
Keywords :
Green´s function methods; method of moments; slot antenna arrays; Green´s functions; MoM admittance matrix expressions; MoM formulation; MoM linear system; RLSA antennas; antenna design; conductor loss modelling; electric equivalent currents; electromagnetic formulation; equivalence theorems; magnetic equivalent currents; metal finite conductivity; method of moment formulation; ohmic losses; radial line slot array antennas; reciprocity theorems; rigorous integral approach; Antenna arrays; Arrays; Conductivity; Metals; Moment methods; Slot antennas; Antenna; Green´s; RLSA; arrays; function; impedance boundary condition; moment methods;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6205980
