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The goal of this manuscript is to show the potential of additive manufacturing (AM) to produce cost-effective high-performance passive mm-wave components and antennas. We focus on the particular AM technique developed by SWISSto12 based on the so called Stereolithography (SLA), which consists on the 3D-printing of a skeleton of the component using a non-conductive polymer. Chemical copper plating...
A circuit model approach is here presented to characterize bi-dimensional arrangements of dual-polarized elements. This contribution is an extension of the physical insightful approach previously proposed by some of the authors. The main novelty here resides in the fact that the scatterer may support two different current profiles. This feature becomes crucial for the accurate characterization of...
A physical insightful and quasi-analytical circuit model is here proposed in order to characterize frequency selective surfaces composed by scatterers/apertures of arbitrary geometry. The present work is an extension of the approach previously proposed by some of the authors that dealt only with simple dipole-based periodic surfaces. In order to account for scatterers of more complex shape, their...
This paper presents a simple, low-cost and compact mobile ground terminal antenna for Ka-band satellite communications that operates in the downlink band (19.7–20.2 GHz). The antenna is composed of a shaped dielectric lens which tilts in front of a planar feed to direct the beam. The planar feed is a circularly polarized patch antenna placed inside a cavity. The lens allows a mechanical beam steering...
Ka-band satellite technology has been drawing growing interest from public transportation industry to military applications, due to its advantages of higher speed links, smaller terminals and reduced costs. These well-recognized characteristics have also boosted the interest in exploiting the Ka-band devices for personal use in small boats or all-terrain vehicles. This paper presents a simple, low-cost...
The disposal of an equivalent network representation to characterize the frequency behavior of grounded periodic arrays of printed patches is here combined with the assistance of full-wave electromagnetic simulator to achieve a very efficient method for analysis/design. The basic restriction of the present procedure is that the frequency band cannot be extended much beyond the first fundamental resonant...
The development of circuit-like models for the study of periodic 1D and 2D distributions of planar metallic scatterers has a long tradition in the microwaves and antenna literature, specially in the frame of the characterization of frequency-selective surfaces. In recent years, there have been developed improved models that account for extraordinary transmission/reflection phenomena and incorporate...
A circuit model is here proposed to characterize grounded arrays of printed patches. This equivalent circuit reproduces the behavior of the structure in a wide frequency range with the only restriction of dealing with single resonant scatterers. Full-wave data is required to build some elements of the equivalent circuit. However, only a reduced number of simulations is needed, in contrast to other...
This paper presents an equivalent circuit approach to study the scattering characteristics of frequency selective surfaces (FSS). The derivation of this equivalent circuit comes from the recognition of a minimal-order configuration that accounts for the interaction of the impinging plane wave with the higher-order Floquet harmonics excited by the periodically repeated unit cell. Key in this approach...
This paper presents an equivalent transmission-line circuit that accounts for the scattering of a TE polarized plane wave that impinges obliquely on a periodic array of metallic patches sandwiched in a dielectric slab. The proposed approach gives a very efficient reduced-order model of the electromagnetic phenomenon and able to reproduce all the fine quantitative details of the reflection/transmission...
This presents an equivalent transmission-line circuit that accounts for the scattering of a TE polarized plane wave that impinges obliquely on a periodic array of metallic patches sandwiched in a dielectric slab. The proposed approach gives a very efficient reduced-order model of the electromagnetic phenomenon able to reproduce all the fine quantitative details of the reflection/transmission spectrum...
This paper presents a demonstration on the possibility of one dimensional Leaky-Wave Antennas (1D LWAs) to shape the broadside-directed radiation pattern. Particularly, the symmetrically fed configuration is studied in detail for the case of a 1D LWA loaded with a Partially Reflective Surface (PRS). A design methodology is proposed in order to vary the main beam width while achieving broadside radiation...
The use of ground planes is proposed inside the spatial images technique in order to calculate the multilayered shielded Green's functions for rectangular enclosures. The positions of the ground planes are dynamically located, covering two walls of the cavity, as a function of the source position. Spatial mirror images, related to the ground planes, are used to perfectly impose the boundary conditions...
The use of ground planes is proposed inside the spatial images technique in order to calculate the multilayered shielded Green's functions for rectangular enclosures. The positions of the ground planes are dynamically located, covering two walls of the cavity, as a function of the source position. Spatial mirror images, related to the ground planes, are used to perfectly impose the boundary conditions...
This work presents a novel leaky-wave antenna (LWA), conceived from the insertion of a dipole-based frequency selective surface (FSS) into a top-open rectangular waveguide. It is explained how the printed circuit has the ability to control the radiation rate of the leaky modes that propagate through this structure at a certain frequency. This attribute makes possible the tapering of the radiation...
A new simple and rigorous analysis technique is presented to derive the complex dispersion characteristics of periodic 2-D Fabry-Pérot Leaky-Wave Antennas (LWA). In order to illustrate the basics of the method an example involving a 2-D periodic array acting as a partially reflecting surface (PRS) situated at half-wavelength distance from a ground plane is utilised. The analysis procedure is based...
We present simple and accurate analysis techniques to simulate and design high-gain Fabry-Perot resonant leaky-wave antennas (LWA). To control the radiation properties of these antennas, two metallodielectric periodic structures are used, one acting as a partially reflective surface (PRS) and a second acting as a high impedance surface (HIS). Full-wave method of moments (MoM) is employed for the estimation...
Partially reflecting surface (PRS) antennas have attracted considerable interest in recent years due to their ability to conceive high-directivity low-profile broadside 2D antennas with simple configurations. On the other hand, ID leaky-wave antennas (LWA) combining a waveguide and printed circuits have shown the ability to flexibly control the phase velocity and the radiation-rate of the leaky- mode,...
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