Waveguide Subsystems for Antenna Feed

Prof. Angel-Mediavilla

(Angel Mediavilla, University of Cantabria, Spain)

This talk is about the waveguide subsystems for antenna feed, these antennas feed subsystems are composed of a series of the structures and components. The waveguides sections, waveguide bends, junctions, the impedance transformers and the transitions are structures. The microwaves components used in the antenna feed system are the transducers orthomode (OMTs), the diplexers, the polarizers, the phase shifters, the filters, tracking couplers, mode converters etc. Two or more components and structures can form a subsystem. These antennas feed systems are used for transmitting and receiving polarized signals, linearly or circularly, by the same antenna. The main aim was the increase in the quantity of information to be transmitted or received for solving the saturation problems of the spectral bands available. This problem has been solved in two different ways: either by the widening of the frequency bands available of the subsystems, or by the use of the double ways for Tx and RX, or by both of them at the same time. All these subsystems are in waveguides technology and are characterized by their low losses, high power-handling capability, cost-effectiveness and facilities of manufacture.

Biography:

Angel Mediavilla Sanchez was born in Santander, Spain, in 1955. He graduated in 1978 and received the Doctor of Physics (Electronic) degree with honours in 1983, both from the University of Cantabria, Santander, Spain. From 1980 to 1983 he was Ingenieur Stagiere at THOMSON-CSF, France. He is currently head of the Communications Engineering Department at the University of Cantabria. He has a wide experience in the analysis and optimization of nonlinear microwave active devices. His research interests are nonlinear MESFET/HEMT and HBT device modelling with special application to the large signal computer design and new waveguide structures for antenna feed systems.