A typical multimedia via satellite transmission needs to cover, from a geostationary orbit, a large terrestrial zone with 40 to 50 semi-contiguous beams, for very high gain & re-using 10 to 12 times the same frequency resource, by dividing the available bandwidth in 4 sub-bands, 1 spot-beam over 4. Such multi-beam antenna much increases the System capacity, for providing broadband services dire...

This thesis first discusses the design, fabrication, and test results of UHF preamplifier designed to operate from 400 to 500 MHz. The preamplifier integrates a single-pole double-throw (SPDT) switch, tapped-line interdigital filter, balanced lownoise amplifier, and gain stage in a compact, multilayer package. The switch and amplification stages are realized on one layer, and the stripline filt...