It is a type of antenna which is constructed when the end of the antenna is flared out or tapered...

The Yagi antenna or aerial sometimes called the Yagi-Uda antenna is widely used for broadcast, domestic and commercial radio communications...

The superheterodyne radio was one of the most successful forms of radio being used almost exclusively as the RF circuit...

The regenerative receiver or regen radio provides a significant increase in gain and selectivity over the standard tuned radio frequency...

The TRF, tuned radio frequency radio receiver was widely used in the early days of radio, but is hardly used...