The document discusses frequency extension radio front-ends for VHF/UHF range. It describes a universal structure based on a triple-conversion heterodyne frequency translator with some receive and transmit channels that have independent or phase coherent common local synthesizers and an embedded controller. The main function is frequency conversion between the radiated (RF) and digitally processed (IF) frequency domains. It also discusses the performance of the local synthesizers in terms of wide tuning bandwidth for fast frequency changing and typical phase noise and frequency settling time measurement results. Examples of typical physical implementations are shown including single channel VHF/UHF and a 4 channel coherent VHF/UHF front-end.