Reversible 40 Meter Moxon
Initial NEC model analysis comparing three reversible 40-meter Moxon antenna designs.
Description
The author presents initial NEC model results for a reversible 40-meter Moxon antenna, comparing three distinct designs: a standard rectangle, a W6NL short-tipped variant, and a T-hat configuration. All three models exhibit similar electrical performance, with gain figures around 5.5 dBi and front-to-back ratios exceeding 20 dB. The primary differentiation among the designs lies in their mechanical construction and physical dimensions, which are critical for a 40-meter antenna.
The rectangular Moxon requires robust support due to its element lengths, while the T-hat design offers enhanced structural integrity with slightly longer elements. The T-hat model is provisionally selected for further development, emphasizing the importance of mechanical considerations over minor electrical performance differences. Future work will focus on detailed mechanical design and construction aspects of the chosen T-hat configuration.