José Luis Fernández Jambrina

Universitat Politècnica de Catalunya

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Manuel Sierra Pérez

Universidad Politécnica de Madrid

Manuel Sierra Castañer

Universidad Politécnica de Madrid

José Luis Masa‐Campos

Universidad Politécnica de Madrid

Belén Galocha Iragüen

Universidad Politécnica de Madrid

Ignacio Montesinos Ortego

Universidad Politécnica de Madrid

Fernando Las‐Heras

Universidad de Oviedo

Leandro de Haro Ariet

Universidad Politécnica de Madrid

Miguel Calvo Ramón

Universidad Politécnica de Madrid

M. Vera‐Isasa

Universidade de Vigo

Ramón Martínez Rodríguez‐Osorio

Universidad Politécnica de Madrid

Cooperative Institutions

Universidad Politécnica de Madrid

Comunidad de Madrid

European Telecommunications Standards Institute

Universidad Complutense de Madrid

Universidad Autónoma de Madrid

Unidades Centrales Científico-Técnicas

Universidad Carlos III de Madrid

Polytechnic University of Puerto Rico

Aristotle University of Thessaloniki

Democritus University of Thrace

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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

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Citations (4)

Analysis of shipboard HF antennas with PDMPH2 computer code

José Luis Fernández Jambrina Fernando Las‐Heras

Code (set theory)

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Simulation of Curved Surfaces by Patch Modeling in the Study of Electromagnetic Scattering by Resonant Size Bodies

Fernando Las‐Heras José Luis Fernández Jambrina

The study of the scattering of conducting closed surfaces of resonant electric size is accomplished using the electrical field integral equation (EFIE) with the method of moments (MM) and planar triangular patch modeling. Patch models of regular polyhedrons of different number of faces are generated. The backscattering radar cross sections (RCS) of these bodies are calculated in all directions (solid angle of 4π) of incidence of the plane wave. Vertical linear polarization is used. A comparison between the results obtained with the numerical method and the theoretical results of the circumscribed sphere is made, which permits to obtain some conclusions of the limitations in the simulation of curved surfaces by planar surface patches.

Radar cross-section

10.1109/euma.1990.336257

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Review of base stations array antennas developed by UPM

José A. Encinar Manuel Sierra Pérez Mariano Barba Gea Miguel Calvo Ramón Manuel Sierra Castañer

Several array architectures developed at Universidad Politecnica de Madrid (UPM) for mobile phone and LMDS base station antennas are presented. An eight-element array and multi-beam antennas with enhanced bandwidth have been demonstrated for GSM-UMTS. A practical implementation of a smart antenna with interference cancellation has been built for a 3er generation mobile communication system based on W-CDMA. Low-cost omnidirectional and sectored antennas has been developed for LMDS base station at 3 GHz. A folded three-layer printed reflectarray with shaped pattern has been demonstrated for sector LMDS base stations at 26 GHz.

Collinear antenna array

Conformal antenna

UMTS frequency bands

Reflective array antenna

GSM

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Design and implementation of an adaptive antenna for mobile communications (ADAM)

Manuel Sierra Pérez Miguel Calvo Ramón Leandro de Haro Ariet José Luis Fernández Jambrina Belén Galocha Iragüen

This paper describes the implementation of a simplified version of an adaptive antenna that can be applied to standard UMTS Node-B, both in the up and down links. The prototype includes the radiating elements, the RF and IF subsystem, the digital MODEM and the adaptive array algorithms.

UMTS frequency bands

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Some results of the scattering of simple conducting bodies in the vicinity of a cloud of dipoles

Fernando Las‐Heras José Luis Fernández Jambrina

A method-of-moments wire model is employed to obtain the variation of the radar cross section of a perfectly conducting plate when it is placed near a cloud of resonant dipoles. The effect of the relative position between the plate and the cloud is studied. Different cases of coupling between the dipoles are also analyzed in order to study their influence on the interaction between the plate and the cloud. A time-domain response is obtained when a RF pulse is incident on a plate hidden by a cloud of dipoles.< >

Radar cross-section

Discrete dipole approximation

Position (finance)

Variation (astronomy)

10.1109/aps.1991.174764

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Geoda: Conformal Adaptive Antenna of Multiple Plannar Arrays for Satellite Communications.

International Symposium on Antennas and Propagation (2008)

Ignacio Montesinos Ortego José Luis Masa‐Campos Manuel Sierra Pérez José Luis Fernández Jambrina

This is a brief of the development of a new multiple-array antenna, working on the 1.7 GHz band. The main purpose of the project is to establish communications between a satellite constellation and the terrestrial station. Signals from the constellation is followed by the antenna by means of an adaptive beam system.

Communications satellite

Satellite constellation

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Primeras etapas de implementación de una antena inteligente para UMTS

Manuel Sierra Pérez Leandro de Haro Ariet Miguel Calvo Ramón José Luis Fernández Jambrina Belén Galocha Iragüen

UMTS frequency bands

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Radial line slot antenna design for monopulse Space Debris Radar

2022 16th European Conference on Antennas and Propagation (EuCAP) (2016)

Manuel Sierra Castañer J.I. Gaya Fuertes J. M. Segui Gomez de Olea Raul Martín Gallego José Luis Fernández Jambrina

This paper shows the design of a radial line slot antenna for Space Debris Radar Applications. The monopulse antenna has two beams, sum and difference, and requires an amplitude and phase receiver for detection of the azimuth and elevation direction of arrival. The antenna is circular polarized, and this paper focus on the design of the receiver antenna. The paper shows the optimization process of the position and length of slots in the central frequency of 94 GHz and a first analysis of the feeding network. This design will be tested with the fabrication of a prototype.

Monopulse radar

Amplitude-Comparison Monopulse

Radial line

Antenna rotator

10.1109/eucap.2016.7481860

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Diseño de antena monopulso de polarización circular en guía radial

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

The authors propose the design of one radial line slot antenna with two simultaneous beams, one broadside beam and one conical beam. The antenna is a radial line slot antenna, with the slots placed on the upper plate in concentric rings. The radiation element is a slot pair, designed for getting left hand circular polarization. The antenna has been designed for working between 13.4 and 14 GHz. Both beams are obtained independently through very simple excitation circuits (Butler Networks). Comparing both radiation patterns, amplitude and phase, theta (0o to 10o) and phi (0o -360o) angles can be obtained.

Radial line

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