Exploració per tema "Antenna arrays"
Ara es mostren els items 1-20 de 75
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100 GHz retina for THz tomographic imaging
(2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn a tomographic imaging system, the key is to collect a sufficient number of scattered field points to recover the currents in the inverse scattering problem. This can be accomplished by using a real array of multiplexed ... -
2.45 GHz rectena and rectena array design
(Universitat Politècnica de Catalunya, 2015-05-22)
Treball Final de Grau
Accés restringit per decisió de l'autorIn this project, the main idea is to design a circular polarization rectenna and use this same rectenna to build a 2x2 array to capture the energy emitted at 2.45 GHz. The rectenas are antennas with a rectifier which is ... -
3D arrayed microwave tomographic system for medical imaging
(2010)
Text en actes de congrés
Accés obertIn this paper, a combined tomographic imaging system comprising the rotation of a multiplexed linear antenna array around the object under test is designed. With this system a cylindrical sampling is obtained, allowing to ... -
A Cubesat-ready phase synchronization digital payload for coherent distributed remote sensing missions
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertDistributed antenna arrays, fractionated payloads and cooperative platforms can provide unprecedented performance in the next generation of spaceborne communications and remote sensing systems. Remote phase synchronization ... -
A generic level 1 simulator for spaceborne GNSS-R missions and application to GEROS-ISS ocean reflectometry
(2017-07-18)
Article
Accés obertIn the past decade Global Navigation Satellites System Reflectometry (GNSS-R) has emerged as a new technique for earth remote sensing for various applications, such as ocean altimetry and sea state monitoring. After the ... -
A Ku band circularly polarized 2×2 microstrip antenna array for remote sensing applications
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper reports the development of a Circularly Polarized (CP) microstrip patch array working at Ku band and in particular between 16.9-17.2GHz for remote sensing applications. The design is based on a sequential ... -
A new class of antenna array with a reconfigurable element factor
(2013-04)
Article
Accés restringit per política de l'editorialA parasitic layer-based multifunctional reconfigurable antenna array (MRAA) formed by the linear combination of four (4 1) identical multifunctional reconfigurable antenna (MRA) elements is presented. Each MRA produces ... -
A new strategy to design SIW-fed arrays
(Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
Text en actes de congrés
Accés obertIn this work, a new full-wave strategy, with very low iteration times, is proposed for the optimization and design of antenna arrays fed by substrate integrated waveguides. The device is decomposed into fixed and ... -
A practical approach for NLOS mitigation in location-aware networks
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper introduces a practical two-stage approach to achieve the mitigation of the Non Line Of Sight condition by using space-time diversity in timing-based mobile subscribers positioning systems. The first stage performs ... -
A reduced-complexity and asymptotically efficient time-delay estimator
(ICASSP, 2000)
Text en actes de congrés
Accés obertThis paper considers the problem of estimating the time delays of multiple replicas of a known signal received by an array of antennas. Under the assumptions that the noise and co-channel interference (CCI) are spatially ... -
Active microwave imaging: a cylindrical system for biomedical applications
(1988)
Text en actes de congrés
Accés obertThe authors examine the use of active microwave tomography as an imaging technique which gives information on the dielectric properties of the body. They show that a cylindrical system is an efficient option to obtain ... -
An architecture analysis for millimeter-wave optically steerable antenna array
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Comunicació de congrés
Accés restringit per política de l'editorialA lens-based integrated photodiode-antenna array for a Radio over Fiber (RoF) 5G wireless base station at millimeter-wave frequencies is proposed and analyzed. The elements of the array are based on slot bow-tie antennas ... -
Antenna array configurations for massive MIMO outdoor base stations
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialMassive MIMO predicts unprecedented capacity and energy efficiency improvements in future networks, by the use of base stations with hundreds of antennas. However the crucial question of determining suitable, or even ... -
Application of the multilevel decomposition algorithm to the frequency analysis of large microstrip antenna arrays
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-03-31)
Article
Accés obertThe application of integral equation methods based in the method of moments discretization to solve large antenna arrays is difficult due to the fact that the computational requirements increase rapidly with the number ... -
Array-geometry invariant signaling for MISO feedforward opportunistic communications
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Text en actes de congrés
Accés obertThe impact of antenna array geometry on scenario- aware invariant signaling is studied in the context of feedforward opportunistic communications. Invariance plays an elemental role to guarantee the detectability in ... -
Assessment of LTCC-based dielectric flat lens antennas and switched-beam arrays for future 5G millimeter-wave communication systems
(2017-10-30)
Article
Accés obertIEEE This paper presents design, LTCC fabrication, and full experimental verification of novel dielectric flat lens antennas for future high data rate 5G wireless communication systems in the 60 GHz band. We introduce and ... -
Beamforming and Multiuser Detection in CDMA Systems with External Interferences
(ICASSP'99, 1999)
Text en actes de congrés
Accés obertMultiuser detection has been investigated to mitigate the near-far effect in CDMA systems. Antenna arrays have been shown to provide spatial diversity and cancel undesired signals. In this paper we consider the synergy of ... -
Blind multi-user combining at the base station for asynchronous CDMA systems
(Institute of Electrical and Electronics Engineers (IEEE), 1996)
Text en actes de congrés
Accés obertThis paper studies the potential benefits of antenna arrays in cellular CDMA communications and proposes a powerful scheme to undertake the array processing at the base station in CDMA mobile systems. The proposed technique ... -
Channel matrix characterization in MIMO scenario through impedance modulation
(2010)
Text en actes de congrés
Accés obertIn this paper a new measurement setup to obtain the characteristic channel matrix of a MIMO radio system is presented using a small and non intrusive device able to characterize two antennas and therefore obtaining the ... -
Design and Optimaztion of an Ultra-Wideband, Low-Profile, Dual-Polarized PUMA+ADL Array
(Universitat Politècnica de Catalunya, 2023-09-15)
Projecte Final de Màster Oficial
Accés restringit per acord de confidencialitat
Realitzat a/amb: HensoldtIn this Thesis, a novel ultra-wideband radiating element for antenna array applications has been investigated. Along with the demanding industry bandwidth requirements for next generation Electronically Steered Antennas ...