hi K.Rajandran ,
vsat is a tranciver with a parabolic antenna. it linked to the satellite to reached the other part of the world.
microwave is ALMOST the same as minilink. it’s also a tranciver but with a radome antenna.usually microwave is used in mobile communication industry.
vsat has high power in order to reached satellite(more than 1000km). minilink can only reach 10km or so.