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ABSTRACT: A study of the phase center position of dielectric rod waveguide (DRW) antennas (silicon and sapphire) for different millimeter-wave (mm-wave) frequencies is presented in this document. Phase center position is determined using data obtained by planar scanning and analyzed by means of different methods: least squares fit method with and without weighting coefficients and plane wave spectrum (PWS) analysis method. A study of the radiation pattern and phase center position for different mm-wave frequencies is provided and the results of the different methods are presented and compared.
IEEE Transactions on Antennas and Propagation 09/2011; · 2.15 Impact Factor
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ABSTRACT: This document presents an approach to the phase centre determination of a dielectric rod waveguide (DRW) antenna by means of measurements obtained with a planar measuring system at millimeter wave lengths. Phase centre determination by the least squares fit technique is described in this document for different DRW antennas (silicon and sapphire). Results at different operating frequencies are offered.
Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on; 05/2010
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ABSTRACT: The aim of this paper is to introduce a novel 12 GHz radiating design based on the idea of transmitarray lens device. In this document, an overview of the functioning of this kind of devices is given and the proposed transmitarray lens is studied, with architecture discussion and selection, as well as some ideas about the design, and manufacturing. In the document, some design, manufacturing and validation of the constituting elements of the lens (radiating elements, transmission circuits and transitions) are presented, together with a complete prototype of assembled transmitarray lens. Radiation pattern measurements in anechoic chamber, as well as gain and directivity values are offered.
Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on; 05/2010
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ABSTRACT: This document gives a view of certain active radiating elements for reconfigurable patch arrays. In literature it could be found different possibilities to obtain feasible reconfigurable antennas, whether placing the active circuitry in the transmission lines or directly over the radiating element. In this paper, the second option is chosen and active radiating elements are analyzed, designed, simulated and prototyped. Finally, measurements of these prototypes are shown. This work is part of a more complete and ambitious project whose purpose consists of designing and prototyping reconfigurable transmit-array structures for microwave applications.
Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on; 04/2009
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ABSTRACT: The aim of this paper is to introduce a novel 12 GHz radiating design based on the idea of active transmitarray. This structure is a kind of intelligent antenna which consists of two radio interfaces connected through microwave circuitry. A feeding horn is placed in front of the RX radio interface, which is illuminated by an incident wave. The intermediate circuits act on the received electromagnetic signal and conduct it towards the TX radio interface. Here, the electromagnetic waves are resent to open space in the form of propagating wave with specific characteristics. In this paper we present an operating prototype. Relevant measurements of the subsystems as well as complete system measurements are shown and discussed.
Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on; 04/2009
