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This paper describes the application of the inversesource also named source-reconstruction technique [1–4] applied to the practical case of a space antenna intended for the European Navigation System GALILEO. The antenna (a pre-development flying on the GALILEO In Orbit Validation Element-B (GIOVE-B) satellite) consists in an array of 42 patch elements, divided into six sectors and fed by a two levels...
Recently, a growing research effort has been aimed at the problem of reconstructing the extreme near field radiated by the antenna from measured field data. Inverse source or the equivalent current/source method (EQC) based on discretization of integral equations has attracted considerable attention due to a host of promising applications in antenna design and diagnostics [1]–[8]. The integral equation...
We want to reconstruct equivalent sources on a “reconstruction surface” ΣR that encloses a volume Ω where the equipment under test (EUT) lies; the EUT encompasses the antenna(s) and possible neighboring scatterers, as need in the application of interest. We employ the equivalence theorem to represent the fields outside the reconstruction surface ΣR and on it. Note that it is typically desirable or...
This paper discuss recent advances in antenna diagnostics from measured field data. The method proposed is based on field representation using equivalent magnetic and electric sources on arbitrary shaped geometries enclosing the antenna under test. This paper briefly outlines the standard formulation and shows the need of enhancement for the general case of fully blind reconstruction. Subsequently,...
Operation of antennas deviates from free-space or intended deployment conditions because of interactions with neighboring objects (like support structures), and often with its own feeding (like in balancing issues); the problem is all the more evident in compact antennas. This problem is important in measurement setups. Undesired interactions affect antenna input impedance and/or radiation pattern,...
This paper presents a novel formulation of the source reconstruction problem on arbitrary three-dimensional (3-D) surfaces based on integral equations. Rigorous boundary integral field identities are employed to enforce that the two unknown currents are Maxwellian on the reconstruction surface; this leads to a dual integral-equation formulation, in contrast to the single-equation formulation found...
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