This paper describes the implementation of and measurements on highly
integrated transmitter and receiver modules featuring digital beamforming (DBF) at Ka-band
frequencies. These modules can be used as building blocks for large receiver or transmitter
terminal antennas. After a review of the essential parts of the receiver and transmitter modules
like antenna elements, Ka-band frontends, miniaturised interfaces and IF / baseband circuitry,
measurement results of one receiver and one transmitter module are presented and discussed