Manuel Sierra Pérez

Universidad Politécnica de Madrid

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Manuel Sierra Castañer

Universidad Politécnica de Madrid

M. Vera‐Isasa

Universidade de Vigo

Javier García-Gasco Trujillo

SES (Luxembourg)

José Luis Fernández Jambrina

Universitat Politècnica de Catalunya

José Luis Masa‐Campos

Universidad Politécnica de Madrid

Ramón Martínez Rodríguez‐Osorio

Universidad Politécnica de Madrid

Leandro de Haro Ariet

Universidad Politécnica de Madrid

Alvaro Noval Sánchez de Toca

Universidad Politécnica de Madrid

José Manuel Fernández González

Universidad Politécnica de Madrid

Ignacio Montesinos Ortego

Universidad Politécnica de Madrid

Cooperative Institutions

Universidad Politécnica de Madrid

European Telecommunications Standards Institute

Comunidad de Madrid

Gemeente Den Haag

Universidad Complutense de Madrid

Universidad Carlos III de Madrid

Universidad Autónoma de Madrid

Centre National de la Recherche Scientifique

Universidade de Vigo

École Polytechnique Fédérale de Lausanne

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Circularly polarized active antenna array system calibration for improved axial ratio performance

Miguel A. Salas‐Natera Ramón Martínez Rodríguez‐Osorio Leandro de Haro Ariet Manuel Sierra Pérez

This paper presents a novel calibration technique for circularly polarized active antenna array with improved axial ratio and polarization-agile systems. The proposed algorithm deals with the problem of calibration of active antenna arrays, proposing a calibration technique that can be implemented in offsite or on-site process depending on the system calibration and control design. The proposed calibration technique starts with the implementation of a complex circular polarization feeding network with the capability to change the response of each of the polarization circuits with signal attenuators. The expansion of equations of the proposed calibration algorithms is also presented. This algorithms deal with the compensation of mutual coupling effect and together with gain, phase and location errors.

Axial ratio

Source

Cite

Citations (0)

Surface impedance for scattered field on a dielectric-coated circular cylinder

European Conference on Antennas and Propagation (2013)

Andrés G. Aguilar Prabhakar H. Pathak Manuel Sierra Pérez

In the scattering analysis of a circular cylindrical structure, the impedance boundary condition (IBC) can approximate and simplify the perfect electric conductor (PEC) boundary condition. The circular cylinder problem can be solved with modal methods but they require a large number of terms when the cylinder radius is large in terms of the wave length. The uniform theory of diffraction (UTD) [1] is commonly used to overcome this issue. The two-dimensional problem of scattering on a circular cylinder covered by a dielectric layer has been analyzed by [2]–[5], but their solutions either do not consider oblique incidence, fail on the transition region or use a constant surface impedance.

Perfect conductor

Source

Cite

Citations (1)

Diseño de doble lente de arrays (Transmitarray)

Pablo Padilla Manuel Sierra Castañer Manuel Sierra Pérez

Source

Cite

Citations (0)

Estimación del modelo de acoplamiento en un array de parches mediante la medida del campo radiado

Óscar Sánchez José Luis Masa‐Campos José Manuel Fernández González D. Castellanos Manuel Sierra Castañer

In the design process of array antennas, coupling is one of the most important elements to be counted. The real feeding radiated coefficients can be quite different from the theoretical ones because of this effect. In this paper, a compensation method is presented allowing matching each element from the array. All the parameters which are part of the coupling process are obtained through measurements, and the model to obtain those parameters is presented. An application to linear patch array is presented as an example.

Source

Cite

Citations (0)

GEODA-SARAS: Multi-phased array planar antenna for satellite communications

European Conference on Antennas and Propagation (2013)

Alvaro Noval Sánchez de Toca J. M. Inclan-Alonso Javier García-Gasco Trujillo José Manuel Fernández González Manuel Sierra Pérez

Nowadays, earth stations have as a common feature the use of large reflector antenna for downloading data from satellites. Large reflectors have impairments such as mechanical complexity, low flexibility and high cost. Thus, the feasibility of other antenna technologies must be evaluated, such as conformal adaptive antennas based on multiple planar active arrays. In the scenery under study, the capability to track several satellites simultaneously, higher flexibility, lower production and maintenance cost, modularity and a more efficient use of the spectrum; are the most important advantage to boost up active antenna arrays over large dishes.

Conformal antenna

Reconfigurable antenna

Reflector (photography)

Communications satellite

Source

Cite

Citations (3)

Antenas de ranuras en línea biplaca sin dieléctrico

A. Álvarez Fernández M. Vera Isasa Manuel Sierra Castañer Manuel Sierra Pérez

Source

Cite

Citations (0)

Man-pack antenna at X-band

J. Alonso Manuel Sierra Pérez

In this paper a low cost man-pack antenna for satellite communications at X band is presented. The antenna has dual circular polarization in Tx and Rx.

Cite

Citations (0)

Synthesis of shaped beam antenna patterns using window currents

J.J. Gonzalez Picazo Manuel Sierra Pérez Angel Maria Benito

An analytical noniterative procedure is presented that allows a power pattern with a shaped main lobe to be obtained. The method is based on the fact that the pattern of an array is not more than the Fourier transform of the currents sequence; i.e. the sequence that results from discretizing the inverse Fourier transform of the pattern. This means that the feed currents are the coefficients of the Fourier series of the pattern with only N harmonics for a given array of N elements. The results obtained assure that, although the shape of the main beam is practically constant for all the windows, the transition from the shaped zone to the side lobes becomes more abrupt as the function which is used to convolve is elaborated. A reduction of the side lobes of the function is also accompanied by the same effect in the pattern.< >

Side lobe

Window function

Sequence (biology)

10.1109/aps.1988.94309

Cite

Citations (3)

Design, Simulation and Test of a Slot Antenna Array using one Parameter Taylor Synthesis in the GHz Range

IEEE Latin America Transactions (2015)

Lácides Antonio Ripoll Solano Manuel Sierra Pérez Diego Pardo Santos

This paper presents the design, simulation and construction of waveguide resonant slot antenna, for operation in the microwave range. The antenna design was done employing a software tool based on the synthesis of Taylor of one parameter and the analysis based on array and aperture models. Different parameters in the antenna design were simulated, like changes in the number of slots and in the sidelobe level. The final antenna design and the direct analysis based in the array model, has been compared with CST® Microwave Studio full wave analysis. The antenna prototype measurement gives satisfactory results and validates the implemented tool.

Simulation software

10.1109/tla.2015.7387223

Cite

Citations (8)

Linear polarization parallel plate slot antenna

Manuel Sierra Castañer Juan F. Izquierdo Manuel Sierra Pérez José Luis Fernández Jambrina M. Vera‐Isasa

We show the design of a linearly polarised flat antenna. The main goal is getting a low cost antenna to use for the reception of Hispasat satellite emissions in the 12 GHz band. The gain needed for the antenna is around 30 dBi. A rectangular array of slots in the upper side of a parallel plate waveguide form the main antenna structure. The guide is excited by one planar feeding structure consisting of an array of rectangular microstrip patches. We also modify the feeding network the design procedure and the materials used to build of the radiation surface.

Patch antenna

Beam waveguide antenna

10.1109/aps.2000.874541

Cite

Citations (4)