Automatic Design of CP-RLSA Antennas

Abstract

In this paper a procedure is presented, allowing the automatic design of circular polarized radial line slot antennas, with either pencil or shaped beam patterns. The antenna slot layout is refined by an optimization scheme based on the physical picture behind the working mechanism of the array. The validity of the approach has been proved by designing very efficient pencil beam antennas, either with maximum directivity or with controlled side lobe levels, and a shaped isoflux beam antenna. Index Terms-Antennaarrays, antenna optimization, moment methods, Radial Line Slot Array (RLSA) d λ apart, making an angle of 45±° with respect to the radial direction ( Fig. 1) [7]. Since the two slots in the

Automatically optimized near-field focusing radial line slot array

“…Their main features are high efficiency, planarity, and compactness [1]- [3]. The possibility to automatically design and optimize such antennas has recently provided new directions for performance enhancement [3].…”

“…Their main features are high efficiency, planarity, and compactness [1]- [3]. The possibility to automatically design and optimize such antennas has recently provided new directions for performance enhancement [3]. The efficiency, simplicity and automatic design of RLSA structures make such antennas extremely attractive for near field applications as near-field probing, radiometry, non-invasive medical imaging, etc.…”

“…In the second step, the derived aperture distribution is synthesized on the RLSA aperture by properly tuning the positions and sizes of the slots of the RLSA. The automatic design procedure proposed in [3] is extended to the near field and linked to an in-house Method of Moment (MoM) [8] to speed up the computational time and optimization process.…”

“…This distribution is evaluated from the normal component of the electric field following similar steps of those proposed in [6]. The position and size of the slots of the RLSA antenna are then automatically optimized by using an automatic design procedure as in [3].…”

Efficient Computation of the Coupling Between a Vertical Line Source and a Slot

“…UMERICAL modeling of arbitrarily-shaped slotted waveguides and antennas is a vast research topic receiving considerable attention in last years, as the degree of complexity of the analyzed structures increases and their fine details need to be correctly described [1], [2].…”