@article {4_Omni_antenna_parasiticstripsMOTL, title = {Circularly polarized omnidirectional millimeter wave monopole with parasitic strip elements}, journal = {Microwave and Optical Technology Letters}, volume = {49}, number = {3}, year = {2007}, month = {Mar.}, pages = {664-668}, abstract = {A circularly polarized omnidirectional millimeter wave monopole with parasitic strip elements for a system of arrival signal direction detection in millimeter band is presented. As a consequence of the radiation pattern requirements, the proposed antenna consists of a conical skirt monopole with a polarizer radome. The polarizer converts a wave from linear to circular polarization. The proposed antenna has the advantage to be robust, low cost, and easy to fabricate with conventional materials and printed circuit technology. The study presents simulation and experimental results obtained with an antenna prototype that validate the design.}, keywords = {arrival signal direction detection system, Circular polarization, millimeter antenna, omnidirectional antenna}, issn = {0895-2477}, doi = {10.1002/mop.22237}, url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.22237/abstract}, author = {Fern{\'a}ndez, J M and J L Masa-Campos and Sierra-P{\'e}rez, M} } @article {5_Omni_antenna_slotsMOTL, title = {Omnidirectional circularly polarized slot antenna fed by a cylindrical waveguide in millimeter band}, journal = {Microwave and Optical Technology Letters}, volume = {49}, number = {3}, year = {2007}, month = {Mar.}, pages = {638-642}, abstract = {A circularly polarized slotted array antenna is presented. The array is fed by a circular waveguide propagating the TM01, to properly generate the required polarization. An omnidirectional azimuth radiation pattern is obtained, as well as a ?10{\textdegree}/+30{\textdegree} elevation antenna coverage. Low losses are achieved because of the waveguide feed. The slot array is mechanized over the metallic wall of the circular waveguide. Furthermore, the antenna presents a solid and rigid mechanical structure, which guarantees an optimum and repetitive response in a manufacturing process. A prototype antenna has been designed and measured. Satisfactory results have been obtained. The slotted array takes part from a signal detection system centered in 36.85 GHz.}, keywords = {Circular polarization, conformal slotted waveguide array, transversal magnetic mode, waveguide to coaxial transition}, issn = {0895-2477}, doi = {10.1002/mop.22207}, url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.22207/abstract}, author = {J L Masa-Campos and Fern{\'a}ndez, J M and Sierra-P{\'e}rez, M} } @article {3_CouplingJMOEA, title = {Coupling Characterization and Compensation Model for Antenna Arrays}, journal = {Journal of Microwaves, Optoelectronics and Electromagnetic Applications}, volume = {4}, number = {2}, year = {2005}, month = {Dec.}, pages = {95-110}, abstract = {Coupling is an important aspect to be considered in the design process of antenna arrays. The real feeding radiated coefficients can be quite different from the theoretical ones because of this effect. In this paper, a characterization and compensation model is presented. This procedure is capable of matching each element of the array. All the parameters of the array coupling model are obtained through the measurement of scattering parameters and radiation patterns of the individual elements. Some practical applications to linear patch arrays are presented.}, issn = {1516-7399}, url = {http://www.jmoe.org/site-number?id=3}, author = {J L Masa-Campos and Fern{\'a}ndez, J M and Sierra-Casta{\~n}er, M and Sierra-P{\'e}rez, M} } @article {1_CouplingmodelMOTL, title = {Estimation of the patch-array-coupling model through radiated-field measurements}, journal = {Microwave and Optical Technology Letters}, volume = {43}, number = {1}, year = {2004}, month = {Oct.}, pages = {59-65}, abstract = {In the design process of array antennas, coupling is one of the most important elements to be considered. The real feeding-radiated coefficients can be quite different from the theoretical ones because of this effect. In this paper, a characterization method is presented that allows each element to be matched from the array. All the parameters of the array-coupling model are obtained through the measurement of scattering parameters and radiation patterns. Two practical applications for a linear patch array are presented.}, keywords = {array, coupling, patch antenna, planar antenna}, issn = {0895-2477}, doi = {10.1002/mop.20375}, url = {http://onlinelibrary.wiley.com/doi/10.1002/mop.20375/abstract}, author = {Fern{\'a}ndez, J M and J L Masa-Campos and Sierra-Casta{\~n}er, M and Castellanos, D and Sierra-P{\'e}rez, M} }