Showing papers by "Eva Rajo-Iglesias published in 2016"
TL;DR: In this article, a leaky-wave antenna, realized using gap waveguide concept, is proposed, where both the feeding structure and the antenna are realized in groove gap waveguarantee technology, thus simplifying the whole structure.
Abstract: A novel leaky-wave antenna, realized using gap waveguide concept, is here proposed. Both, the feeding structure and the antenna are realized in groove gap waveguide technology, thus simplifying the whole structure. A complete design procedure, starting from a given groove waveguide to the final radiation mechanism, is described in this communication. The results are supported with measurements of a prototype that operates in the X-band. The realized antenna has a gain around 18 dB between 9 and 11.5 GHz, demonstrating the potential of the proposed radiation technology.
57 citations
10 Apr 2016
TL;DR: A novel Electromagnetic Band Gap (EBG) structure based on an off-shifted periodic metasurface is presented in this paper, which can be employed for packaging of electrical circuits and gap waveguide technology.
Abstract: A novel Electromagnetic Band Gap (EBG) structure based on an off-shifted periodic metasurface is presented here. This technique can be employed for packaging of electrical circuits and gap waveguide technology. The proposed structure is easy to manufacture since it only requires drilling holes in metallic plates, reducing the cost when compared to previous works based on other textured surfaces.
21 citations
TL;DR: In this paper, a leaky-wave thinned phased array is implemented in printed circuit board (PCB) technology and the authors demonstrate that a reduction of the grating lobes, and therefore an improved gain in a thin-walled phased array, with respect to standard solutions, is achieved by virtue of the angular filtering introduced by the leaky wave cavity in the far field.
Abstract: We present a practical implementation of a leaky-wave thinned phased array in printed circuit board (PCB) technology. In this paper, we demonstrate that a reduction of the grating lobes, and therefore an improved gain in a thinned phased array, with respect to standard solutions, is achieved by virtue of the angular filtering introduced by a leaky-wave cavity in the far field. The presented array is designed in PCB and integrated with an inductive partial reflective surface. A full study of the performances of the $7\times 7$ phased array antenna for several scanning angles and frequencies is presented. This paper shows an improved gain, directivity, grating lobe level, back lobe level, beam efficiency, and active reflection coefficient with respect to a reference solution based on $2\times 2$ subarrays. The results are validated via the measurements of a $3\times 3$ array prototype.
9 citations
Proceedings Article•
01 Oct 2016
TL;DR: A 28 GHz four-beam antenna based on the combination of a 4×4 Butler matrix and a Fabry-Perot superlayer is the final goal of this work.
Abstract: A 28 GHz four-beam antenna based on the combination of a 4×4 Butler matrix and a Fabry-Perot superlayer is the final goal of this work. The matrix is designed in the low loss inverted microstrip gap waveguide technology, including the design of a transition to microstrip to enable measurements. Multibeam antennas with high efficiency are of interest for the future 5G communication systems to be used for instance in MIMO systems.
2 citations
Proceedings Article•
01 Nov 2016TL;DR: In this article, a contactless, in-line, wideband and low-loss micro strip to GrooveGap transition operating at X-band is presented, which is based on transforming EM fields from the SIW to the RidgeGap waveguide mode via near field electromagnetic coupling.
Abstract: A contactless, in-line, wideband and low-loss micro strip to GrooveGap waveguide transition operating at X-band is presented. The principle of operation is based on transforming EM fields from the SIW to the RidgeGap waveguide mode via near field electromagnetic coupling. This is advantageous, since the proposed solution avoids the use of metal contact between the SIW and one of the waveguide parts. Furthermore, metamaterial-based gap waveguide technology provides a resonance-free packaging solution for the integrated MMIC amplifier. It is the first time a transition that also provides the packaging of the active component is designed. Our device works on X-band due to present test equipment limitations, but it can be scaled to mm-wave frequencies and beyond.
01 Nov 2016
TL;DR: In this article, a contactless, in-line, wideband and low-loss micro strip to GrooveGap transition operating at X-band is presented, which is based on transforming EM fields from the SIW to the RidgeGap waveguide mode via near field electromagnetic coupling.
Abstract: A contactless, in-line, wideband and low-loss micro strip to GrooveGap waveguide transition operating at X-band is presented. The principle of operation is based on transforming EM fields from the SIW to the RidgeGap waveguide mode via near field electromagnetic coupling. This is advantageous, since the proposed solution avoids the use of metal contact between the SIW and one of the waveguide parts. Furthermore, metamaterial-based gap waveguide technology provides a resonance-free packaging solution for the integrated MMIC amplifier. It is the first time a transition that also provides the packaging of the active component is designed. Our device works on X-band due to present test equipment limitations, but it can be scaled to mm-wave frequencies and beyond.
01 Jun 2016
TL;DR: In this paper, a leaky wave antenna based on the gap waveguide technology is proposed, where a groove gap-waveguide is used as feeding and it also acts as antenna at the same time.
Abstract: A novel leaky wave antenna, based on the gap waveguide technology, is here proposed. A groove gap-waveguide is used as feeding and it also acts as antenna at the same time. The proposed antenna provides an excellent performance while maintaining a simple design. To demonstrate the potential of this radiation mechanism, an antenna was designed to operate between 9 GHz and 11.5 GHz. The antenna has a gain around 12 dB and provides a radiation pattern that steers its radiation direction with the frequency.