Research Lines:​ From biological effects to subsystem design in
communications satellites​
Foto: ESA Grupo de Electromagnetismo Aplicado​
Biological effects of electromagnetic fields Studies of absorption rate of electromagnetic fields in tissues at different frequencies. Microwave hyperthermia and dosimetry for cancer treatment​ MORE... Computational Electromagnetism Hybridization of different techniques: MoM, FEM, domain decomposition. MORE... Integration of analysis techniques into optimization processes Implementation of efficient numerical methods in computational electromagnetism Design of waveguided devices on board communications satellites and spacecrafts MORE... Design of passive components: ​
X-band diplexer for the KMIL satellite​
Ku-band diplexer for the Amazon 5 satellite Diplexer and the OMT in Ku band for SES-12 satellite.
Periodic structures and transmission systems.
Electromagnetic metamaterials
MORE... Analysis and characterization of periodic transmission lines and waveguides. ​
Design of passive microwave devices and millimeter waves, such as electronic scanning antennas with full back-fire to end-fire sweep capability​
New antenna tecnologies for space applications GEA has led several ESA contracts to develop innovative reflectarray technologies for DBS and multi-beam satellite antennas MORE... Reconfigurable beam antennas based on liquid crystal reflectarrays Low-cost technology from microwaves to terahertz, with applications on 5G networks, radar and satellite communications MORE...


The Applied Electromagnetism Group (GEA) has more than twenty years experience in developing software tools for the analysis and design of passive devices, periodic structures and antennas for space applications. The group has implemented efficient numerical methods in computational electromagnetism, based on hybridization of MoM, MEF, Modal Analysis and Domain Decomposition.​

Different waveguide components have been designed, manufactured and measured (polarizers, filters, diplexers/triplexers, OMT, power combiners, beam forming networks) and dichroic subflectors. Some have been used in telecommunications satellites (Hispasat-1A-B-C-E, Artemis, Sesat, Astra-1K-3B-1M, Europe*Star, Newbird, Sky-Bridge, Eutelsat-W2A, Amazonas-2-5, among others) and in scientific missions (Mars Express, Venus, Express, Rosetta, Herschel-Planck, Bepi-Colombo).​

GEA has led several ESA contracts to develop innovative reflectarray technologies for space applications, including satellite antennas with different coverages in Ku-band and  for multi-beam coverage in Ka-band.​

Other areas of research are: the development of antennas to electronically scan or reconfigure the beam using different technologies (pin diodes, MEMS and liquid crystals) in the frequency range from 9 GHz to 300 GHz; design of RF components based on metamaterials; and evaluation of biological effects of electromagnetic fields, including hyperthermia and dosimetry.​


Reconfigurable antennas for 5G millimeter wave networks

New antenna technologies for satellites

Electromagnetic Metamaterials​.

Microwave hyperthermia and dosimetry for cancer treatment.

Development of efficient techniques for analysis and design of RF devices and antennas

Our designs on commercial satellites

Implementation of efficient numerical methods in computational electromagnetism, based on Method of Moments (MoM) Finite Elements (MEF), Modal Analysis (MA) and Domain Decomposition (DD).
We have designed, built and measured different waveguide components: polarizers, filters, diplexers/triplexers, OMT, power combiners, beam forming networks, as well as periodic structures and electromagnetic metamaterials.​
New antenna technologies for satellites and 5G networks in millimeter waves.​ Ultra wideband antennas, horns and dielectric lenses. ​Antennas for biomedical applications.
Components in Satellites
Hispasat-1A-B-C-E, Artemis, Sesat, Astra-1K-3B-1M, Europe*Star, Newbird, Sky-Bridge, Eutelsat-W2A, Amazonas-2-5, Mars Express, Venus Express, Rosetta, Herschel-Planck, Bepi-Colombo…



Jaime Esteban Marzo
Full Professor
José María Gil Gil
Full Professor
José Ramón Montejo Garai
Full Professor
Jorge A. Ruiz Cruz
Full Professor
Juan Córcoles Ortega
Associate professor
Jesús García Jiménez
Associate Professor
7_Gonzalez de Aza, Miguel Ángel
Miguel Ángel González De Aza
Associate Professor
9_Carrasco, Eduardo
Eduardo Carrasco Yépez
Associate Professor
10_Lopez Palomino, Gerardo
Gerardo Pérez Palomino
Associate Professor
Daniel Martínez de Rioja Del Nido
Teodoro Lora Leñador
Robert Guirado
Jesús M. Rebollar Machain
Emeritus Full Professor



Reflectarray-based Antennas for SmallGEO and LEO Communications Satellites ” PDC2021-120959-C21-2


Se ha demostrado una antena que genera haces múltiples en banda Ka para proporcionar acceso a internet desde satélite, mediante un modelo a escala ½ de una antena real.​


Space Debris Radar​

Comunidad de Madrid, S2013/ICE-3000 (2014-2018)

Several technologies were developed for  a space debris  detection radar. When located on space platforms such as the International Space Station or communications satellites, the radar would be used to prevent collision with dangerous objects.


“Multiple Beam Antennas based on Reflectarrays and Transmitarrays” ESA-AO8438​


We have shown that a four-color multi-spot coverage (two frequencies and two polarizations) can be obtained with only two reflectarray antennas, instead of four conventional reflector.

Innovative Reconfigurable Systems Based on Liquid Crystals (ESA-AO6419)


We have successfully designed, manufactured and tested a beam-scanning antenna at 100 GHz, made of a parabolic main reflector and a reconfigurable reflectarray subreflector  based on Liquid Crystals (LC)


“Artificial Intelligence Aided D-band Network for 5G Long Term Evolution”


Different technologies are developed and integrated (Artificial InteligenceMaching LearningRadiofrecuency above 100 GHz) for wideband wireless communication systems beyond 5G. We are developing at GEA an antenna, based on liquid crystal technology capable of electronically adapting indoor coverage.

ESA Innovation Triangle Initiative (ITI)​ Compact K/Ka band antenna feed for multi‐beam satellite communications


Development of antenna feed-chain for communications satellites with multi-beam technology in dual-band K/Ka bands.

New hybrid methods for optimizing high-frequency circuits and antenna arrays (TEC2017-83352-C2-1-P)


New hybrid methods have been implemented, which add new capabilities for efficient analysis of passive microwave circuits and antennas. Some of them are design-oriented in SIW (Substrate Integrate Waveguide) technology, since it is an emerging low cost technology.


New additive manufacturing technologies for passive devices in  microwave and millimeter bands (TEC2016-76070-C32R)


New additive manufacturing techniques are changing the development model in many technology sectors. The objective of the Project has been to develop waveguide devices for space applications and power combination using Selective Laser Sintering using aluminum and copper powder mixtures. Different devices such as modal converters, polarizers and transitions have been manufactured.


STeerable BEam Reflectarray Antenna in Q, V/W bands for Gateway Links from LEO Satellites​

In Evaluation

The goal is to demonstrate electronically reconfigurable beam antenna technology in Q V/W bands, based on liquid crystal reflectarrays (LC-RA), for broadband communications using low-orbit satellite constellations.




Passive reflectarray panels are being designed to improve coverage areas in the deployment of the new millimeter-wave 5G networks.​



A reconfigurable beam antenna was designed for high-performance base stations, by implementing liquid crystal technology in a reflectarray antenna.



Design of feed-chain for Amazonas 4B satellite and Asymmetric OMT for AMU satellite​



Design of Ka-band triplexor for Bepi-Colombo spacecraft​


“EuRAAP Antenna Award 2022”

José Antonio Encinar has received the “EuRAAP Antenna Award 2022” by the “European Association on Antennas and Propagation”, for his pioneer contributions to reflectarray antennas for space applications.

The GEA Research Group together with the Radiation Group of UPM has participated in the organization of the Conference EUCAP 2022 in hybrid format with 1100 participants.


Para el diseño de Superficies Reconfigurables Inteligentes (RIS) en el marco del proyecto: Enabling Antenna Technologies for Smart Connectivity in mm-Wave 5G and Beyond: Passive and Reconfigurable Reflectarrays for Base Station Antennas and Intelligent Reflecting Surfaces.

Extraordinary Doctoral Award (2020)​
D. Eduardo María Martínez de Rioja del Nido​
Universidad Politécnica de Madrid.

Prize HISPASAT to the best Master Thesis in the topic of New Technologies for Comunications Satellites (2019). ​

José Daniel Martínez de Rioja del Nido​

“Design and Experimental Validation of Reflectarrays to Generate Four Adjacent Beams Per Feed For Multi-Spot Satellite Antennas”

Finalist to UPM_innovatech 2T Challenge 2019, for innovatve Technologies, with the proposal: Aerialc: Low-cost and high-gain antennas based on Liquid Crystals (LC) technology for electronic beam scanning”, presented to the Industry by Gerardo Pérez Palomino y Eduardo Carrasco Yépez.


Grupo de Electromagnetismo Aplicado ​

Dpto. Señales, Sistemas y Radiocomunicaciones​

Universidad Politécnica de Madrid

E.T.S.I. de Telecomunicación
Edificio B, 4ª planta ​
Avda. Complutense nº 30
28040 Madrid