Microwave

摘要

How linear is the new Mitsubishi RA18H1213G RF MOSFET 1.3GHz band power amplifier module? Sam presents some measurements on his amplifier after reviewing summer conditions on the microwave bands. VHF National Field Day (VHF NFD), held on the weekend of 2/3 July, included the ever-popular 1.3GHz section. Conditions on this band were good to very good on the Saturday, declining to average on the Sunday. Since this contest coincided with the IARU Region 1 multi-band event, there was lots of activity from continental Europe, not only on 1.3GHz but also on many of the higher bands. For VHF NFD-only participants, limited to 1.3GHz and below, many good opportunities were missed on those higher bands. Home station operators, not participating in VHF NFD, were able to take advantage of the good conditions.