Browsing by Author "Romeu Robert, Jordi"
Now showing items 1-20 of 236
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100 GHz retina for THz tomographic imaging
(2011)
Conference report
Restricted access - publisher's policyIn 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 ... -
3-D printed UWB microwave bodyscope for biomedical measurements
(2019-02-15)
Article
Open AccessIn this letter, a three-dimensional (3-D) printed compact ultrawideband (UWB) extended gap ridge horn (EGRH) antenna designed to be used for biological measurements of the human body is described. The operational frequency ... -
3D arrayed microwave tomographic system for medical imaging
(2010)
Conference report
Open AccessIn 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 ... -
3D UWB magnitude-combined tomographic imaging for biomedical applications. Algorithm validation
(2011-06)
Article
Open AccessBiomedical microwave imaging is a topic of continuous research for its potential in different areas especially in breast cancer detection. In this paper, 3D UWB Magnitude-Combined tomographic algorithm is assessed for ... -
3D UWB tomography for medical imaging applications
(2010)
Conference report
Open AccessIn this paper, a novel 3D UWB tomographic algorithm has been presented for brain hemorrhagic stroke detection. While 2D reconstructions are unable to distinguish between features at different heights, 3D reconstructions ... -
3D-printed UHF-RFID tag for embedded applications
(Institute of Electrical and Electronics Engineers (IEEE), 2020-08-10)
Article
Open AccessThis paper presents the design, manufacture and characterization of a novel 3D passive UHF-RFID tag for embedded applications. The prototype is fabricated using additive manufacturing techniques: 3D printing and copper ... -
60GHz channel characterization using a Scatterer Mapping Technique
(2010)
Conference report
Open AccessIn this paper, a Scatterer Mapping Technique based on a Multi-Frequency Bi-focusing operator with good imaging capabilities is used to characterize the 60GHz wireless channel in an office environment. The measurement data ... -
A 3D printed lens antenna for 5G applications
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference lecture
Open AccessA switchable multi-antenna architecture for lens-assisted beamsteering in the Ka-band region allocated for 5G communications (24-30 GHz) is proposed. The radiating elements are bow-tie antennas mounted with a 3D printed ... -
A combined spectral-parabolic equation approach for propagation prediction in tunnels
(2010)
Conference report
Open AccessSeveral techniques can be used to study electromagnetic propagation in tunnels. A combination of two of such techniques is presented in this paper to model propagation inside a rectangular tunnel. They are combined in ... -
A compact dual-band planar monopole antenna using fractal rings and A Y-shaped feeding transmission line
(De Gruytr, 2018-01-01)
Article
Open AccessThis paper presents a novel design approach of a compact dual-band monopole antenna with an overall size of 18.9x13x1.6mm3. The proposed antenna is composed of a fractal ring shaped patch fed by a Y-shaped transmission ... -
A contact-less small antenna characterization through impedance modulation
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
Conference report
Open AccessIn smalls antennas S-parameters measurements are highly influenced by the measurement equipment as well as the environment. In order to avoid this inconvenience, a wireless and non-invasive characterization setup is required. ... -
A cylindrical system for quasy-real time microwave tomography
(Institute of Electrical and Electronics Engineers (IEEE), 1986)
Conference report
Open AccessA cylindrical system for biomedical microwave tomography is presented. The circular algorithms and some numerical reconstructions are discussed. Finally the experimental set-up is described and some preliminary measurements ... -
A figure of merit to assess the performance of photoconductive antennas at terahertz band
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - publisher's policyPhotoconductive antennas are one of the most efficient ways to radiate and receive EM waves around the 1 THz frequency band. The physical processes involved in photoconductive terahertz signal generation are complex enough ... -
A figure-of-merit for pattern reconfigurable antennas
(2013-03)
Article
Restricted access - publisher's policyThe performance of pattern reconfigurable antennas is evaluated with the purpose of deriving a figure-of-merit for pattern reconfigurability. A general formulation is provided for the average gain achieved by a ... -
A microwave invisibility cloak: the design, simulation, and measurement of a simple and effective frequency-selective surface-based mantle cloak
(2018-06-26)
Article
Open AccessIn recent years, there has been a growing interest in developing invisibility cloaks that can conceal an object. These techniques are often based either on coating a dielectric or conducting object with a homogeneous ... -
A model for photocurrent generation in photoconductive antennas
(2019)
Conference lecture
Restricted access - publisher's policyThe laser-induced current carrier generation and transport under large biasing voltages in photoconductive materials located in electrode gap region of photoconductive antennas is a complex process involving many different ... -
A novel compact UHF wideband antenna for near field electrical characterization of Steel Fiber Reinforced Concrete
(IEEE Computer Society Publications, 2009)
Conference report
Open AccessA novel, electrically small, UHF (350 MHz–750 MHz)microstrip slot antenna is presented. The antenna is designed for the characterization of Steel Fiber Reinforced Concrete (SFRC) segments. The antenna consists on a three ... -
A reconfigurable antenna with beam steering and beamwidth variability for wireless communications
(2018-07-12)
Article
Open AccessA reconfigurable antenna (RA) capable of steering its beam into the hemisphere corresponding to ¿ ¿ {-40°,0°,40°}, Ø ¿ {0°,45°,90°,-45°}, and of changing 3-dB beamwidth, where ¿3dB ¿ (40°,100°), Ø ¿ {45°,90°,-45°} for ... -
A simple and effective microwave invisibility cloak based on frequency selective surfaces
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference lecture
Open AccessThis paper presents the design, simulation, manufacturing and testing of a simple invisibility cloak based on a frequency selective surface (FSS). The work is focused on cloaking an electrically thin dielectric cylinder ... -
A submillimeter wave parabolic reflector by additive manufacturing
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Restricted access - publisher's policyThe manufacturing of prototype of an offset parabolic reflector to operate at 120 GHz is presented. The paper describes the different metallization options to achieve a good performance.
