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Falcone F.,Tafco Metawireless | Estevez A.,Tafco Metawireless | Illescas J.,Tafco Metawireless | Torres V.,UPNA | And 2 more authors.
2010 Future Network and Mobile Summit | Year: 2010

In this paper, system simulation for future 3GPP R8 Long Term Evolution (LTE) radio access channel in indoor environment is presented. 3D ray tracing algorithms have been developed in order to analyze coverage-capacity considerations regarding high order modulation schemes present in LTE. The results aid in modeling the behavior of high speed data services in future 4G systems in indoor environments. Copyright © 2010 The authors.


A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)-a concept proposed here for the first time-are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.


Crepin T.,ONERA | Martel C.,ONERA | Gabard B.,ONERA | Boust F.,ONERA | And 8 more authors.
2014 International Radar Conference, Radar 2014 | Year: 2014

In this work, a metaradome based on a fakir's bed of nails is designed and tested in order to suppress the blind directions of a 100-element antenna array. The antenna is a microstrip array designed to operate in X-band. The fakir's bed metamaterial-like was first approximated using analytical formulas before a full-wave numerical optimization. Experimental results are exposed and confronted to numerical results. They show a significant reduction of the blind spot subsequent to the metaradome addition. © 2014 IEEE.


Navarro-Cia M.,Public University of Navarra | Beruete M.,Public University of Navarra | Falcone F.,Public University of Navarra | Illescas J.M.,TAFCO Metawireless | And 2 more authors.
IEEE Transactions on Antennas and Propagation | Year: 2011

More insight on the physics underlying the transmission through subwavelength hole arrays prism by comparing it with propagating hole arrays prism is provided. We show the critical role that the size of the holes plays in this electromagnetic propagation, changing the effective index of refraction from negative (backward wave) to positive values (forward wave) as the hole diameter increases. This causes negative refraction for the zeroth order emerging beam in the cut-off holes prism whereas positive refraction in the non-cut-off holes prism. Furthermore, we revisited from the perspective of superposition principle the explanation of these stacks based on the so-called building sub-units: horizontal rods and vertical wires. Our simple analysis reveals the drawbacks of this earlier interpretation, and reinforces the powerful model founded on a inverse transmission line. Experimental results (co-and cross-polar measurements) performed at the V-band of the millimeter-waves in the Fresnel zone are well supported by numerical analyses. As expected, higher order diffracted outgoing beams are recorded for the classical prism but not for the cut-off holes prism. © 2011 IEEE.


Jarauta E.,Public University of Navarra | Falcone F.,Public University of Navarra | Beruete M.,Public University of Navarra | Illescas J.,Tafco Metawireless
Progress in Electromagnetics Research Letters | Year: 2011

On the basis of backward coupling and left-handed microstrip line, new designs of duplexers and multiplexers will be presented and tested in different configurations. By using microstrip lines with Complementary Split Ring Resonators (CSRRs) etched on the ground plane along with series capacitive gaps in the upper conductor, forward coupling will be inverted into backward coupling. Compact size and fully planar fabrication techniques are important characteristics in the devices proposed.


Beruete M.,Public University of Navarra | Navarro-Cia M.,Public University of Navarra | Estevez A.,Tafco Metawireless | Illescas J.,Tafco Metawireless | And 2 more authors.
2011 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Integration Technologies, IMWS 2011 | Year: 2011

In this work, the application of Extraordinary Transmission properties is analyzed in order to implement practical devices within the millimeter wave band. By stacking texturized metallic layers, it is possible to engineer values of index of refraction and hence different types of devices, such as polarizers, lenses and frequency and polarization dependent multiplexers and demultiplexers. Moreover, the designs can be successfully scaled to other frequency ranges, such as infrared or optical wavelengths. © 2011 IEEE.


Torres V.,Public University of Navarra | Azpilicueta L.,Public University of Navarra | Estevez A.,Tafco Metawireless | Beruete M.,Public University of Navarra | Falcone F.,Public University of Navarra
2011 IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Integration Technologies, IMWS 2011 | Year: 2011

In this work, an analysis of the influence of topology and morphology to the physical radio channel operating at millimeter wave bands in indoor scenarios is presented. A deterministic method, based on 3D ray launching has been implemented and tested with sources transmitting at 80 GHz and 100 GHz. The results show the strong dependence of the indoor scenario in the performance of the system, revealing that the consideration of the topology of the wireless system prior to deployment leads to an optimal final configuration. © 2011 IEEE.


Antonio Marcotegui J.,Tafco Metawireless | Illescas J.M.,Tafco Metawireless | Estevez A.,Tafco Metawireless | Falcone F.,Public University of Navarra
The Scientific World Journal | Year: 2013

A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR) - a concept proposed here for the first time - are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems. © 2013 J. Antonio Marcotegui et al.


A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)-a concept proposed here for the first time-are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.

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