This has made small antennas more popular, despite some limitations. [Tech Minds] reviews the GA-450 indoor active HF loop antenna and finds it better than expected. You can see the video review ...

Generally, the biggest problem a new ham radio operator will come across when starting out on the high frequency (HF) bands is finding ... a magnetic loop antenna might be just the ticket.

The single-turn loop antenna is a metallic conductor bent into the shape of a closed curve, such as a circle or a square, with a gap in the conductor to form the terminals. A multiturn loop or coil is ...