@article {20_EDU_PABLO_ARRAY_GUIA_CUADRADA, title = {Dual Circularly Polarized Array Antenna based on Corporate Feeding Network in Square Waveguide Technology}, journal = {IEEE Transactions on Antennas and Propagation}, year = {2020}, pages = {1-1}, keywords = {Antenna arrays, omnidirectional antennas, Slot antennas}, issn = {1558-2221}, doi = {10.1109/TAP.2020.3019355}, author = {E Garcia-Marin and J L Masa-Campos and P Sanchez-Olivares and J A Ruiz-Cruz} } @article {20_TAP_PABLO_ESCALONA_SLOT_CONFORMAL_CIRCULAR_WAVEGUIDE, title = {High-Gain Conical-Beam Traveling-Wave Array Antenna Based on a Slotted Circular Waveguide at $Ku$ -Band}, journal = {IEEE Transactions on Antennas and Propagation}, volume = {68}, number = {8}, year = {2020}, month = {Aug}, pages = {6435-6440}, abstract = {A high-gain conical-beam traveling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band. A single radiating element is formed by a ring of eight equally spaced slots fed by a circular waveguide. The excitation of the nonfundamental TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the design rules of traveling-wave arrays. Every ring is properly designed to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite and fifth-generation communications. The proposed antenna design has been manufactured in plastic material by using a 3-D printing process and plated by a spray metallization process. A -10 dB impedance bandwidth higher than 23\%, high-gain values around 13.5 dB, or total efficiency higher than 98\% has been achieved for the whole frequency band.}, keywords = {Antenna arrays, antenna radiation patterns, circular waveguides, Couplings, Dipole antennas, omnidirectional antennas, Slot antennas}, issn = {1558-2221}, doi = {10.1109/TAP.2020.2970031}, author = {P Sanchez-Olivares and J L Masa-Campos and E Garcia-Marin and D Escalona-Moreno} } @article {19_ANT_MAG_PABLO_PAULA_CONFORMADA_DIODOSPIN_3_5GHZ, title = {Circular Conformal Array Antenna With Omnidirectional and Beamsteering Capabilities for 5G Communications in the 3.5-GHz Range [Wireless Corner]}, journal = {IEEE Antennas and Propagation Magazine}, volume = {61}, number = {4}, year = {2019}, month = {Aug}, pages = {97-108}, keywords = {5G communications, 5G mobile communication, 5G terrestrial communications, Antenna arrays, antenna radiation patterns, array elements, array signal processing, Beam steering, circular conformal array antenna, Conformal antenna, Conformal antennas, conformal structure, double-stacked microstrip patches, eight-way tunable feeding network, frequency 3.5 GHz, Frequency measurement, microstrip, microstrip antenna arrays, octagonal holding structure, omnidirectional antennas, omnidirectional radiation, P-i-n diodes, Power dividers, single radiating elements, T-junction operation modes, TFN network, tunable T-junctions}, issn = {1558-4143}, doi = {10.1109/MAP.2019.2920049}, author = {P Sanchez-Olivares and P Sanchez-Dancausa and J L Masa-Campos and M Iglesias-Menendez-de-la-Vega and E Garcia-Marin} } @article {17_AWPL_PABLO-SANCHEZ_RADIALWG_ARRAY_OMNI, title = {Compact Omnidirectional Conformal Array Antenna in Waveguide Technology}, journal = {IEEE Antennas and Wireless Propagation Letters}, volume = {16}, year = {2017}, pages = {1102-1105}, abstract = {A conformal array antenna has been designed in the waveguide technology in order to obtain an omnidirectional radiation pattern in the azimuth plane at the Ku-band. The antenna shape is a regular prism, where the single radiating elements, which consist of a rectangular waveguide ended on a cavity{\textendash}slot, are placed on the planar faces of the prism. The physical dimensions as well as the number of faces of the regular prism have been optimized following the conformal array formulation in order to achieve a minimum ripple omnidirectional pattern. An eight-faced regular prism with an apothem of 20.6 mm has been selected as the radiating structure. The single elements are fed by an eightway radial waveguide power divider symmetrically excited by a 50-Ω SMA input port. The use of waveguide technology to design the single elements and the feeding network makes the conformal array suitable for low losses and high-power applications. Several prototypes have been manufactured in order to experimentally validate the antenna performance. An omnidirectional pattern with a maximum ripple of 1.6 dB in the azimuth plane, 95.3\% efficiency, and 11.7\% input matching bandwidth has been measured..}, keywords = {Conformal antennas, omnidirectional antennas, slot arrays}, issn = {1536-1225}, doi = {10.1109/LAWP.2016.2622919}, url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=7725535}, author = {P Sanchez-Olivares and R V Haro-Baez and P P Sanchez-Dancausa and J L Masa-Campos and J A Ruiz Cruz} }