Use a loop if you can
Which full-wave loop to try first: 40 meter, 80 meter, 160 meter, more?
full wave
Articles about the full-wave radio antenna.
NVIS 80m with 160m Full Wave Loop is less than ideal
Big HF loop antennas provide great performance, but they can’t do everything. 160 meter full wave loops won’t work well for NVIS when used at 3.8 MHz.
1/2 Wave vs. 5/4 Wave VHF EZNEC Shootout
Longer is not always better in the world of antennas. Such is the case of the 5/4 wave vertical antenna… a Super J-Pole Wannabe Antenna.