Moxon antenna

[1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon[2] (call sign G6XN).

The two-element design gives modest directivity (about 2.0 dB) with a null towards the rear of the antenna, yielding a high front-to-back ratio: Gain up to 9.7 dBi can be achieved at 28 MHz.

[3] Because the placement and size of the parasitic reflector both depend highly on wavelength, each Moxon antenna functions properly on the frequency band for which it is designed.

Portable Moxon rectangles are favored by radio amateurs for field day and emergency communications use because of their light weight and robust construction.

For VHF and UHF Moxon antennas are small enough that they are more often made from around ⁠ 3 /8⁠ ~ ⁠ 3 /4⁠ inch diameter aluminum tubing, to take advantage of the broader resonant bandwidth, without suffering from excessive wind load.