The Rebirth of HF 

This White Paper was written by Paul Denisowski (KO4LZ) Product Management Engineer, Rohde & Schwarz North America. Darrin, VK3VDP, found it and thought members might be interested in a read. Paul starts his story….

HF stands for “high frequency” and is usually used to refer to signals with frequencies in the range of 3 MHz to 30 MHz, although in many cases the practical definition of HF has be extended down to frequencies as low as 1.5 MHz. HF is also sometimes referred to, somewhat loosely, as “shortwave,” especially in the context of broadcasting. These HF frequencies correspond to wavelengths in the range of approximately 10 to 100 meters. Given that modern homes contain Wi-Fi access points operating in the gigahertz range and that some 5G deployments are taking place in so-called millimeter-wave bands, the names “high” frequency and “shortwave” may seem a bit misplaced, but it is worth nothing that the first experiments in long-distance radio communication by Marconi around the year 1900 used even lower frequency signals. 

Read the remainder of his paper at:

The Rebirth of HF – Rohde and Schwarz


Thanks Darrin for thinking of the membership. Regards Ed.