另外一份数据，有点出入，但是趋势是一样的
4 dB: small diameter loop
5 dB: a single vertical antenna (1/4 wavelength vertical and short verticals)
4 - 6 dB: 250 - 400 foot Beverages and Beverage on Ground (BOG)
6 - 8 dB: array of small loops (flag, pennant, ewe, K9AY, shared apex loop array)
9 dB: two element array of short verticals or a triangle array (65 foot spacing)
10 dB: 500 - 600 foot Beverage
11 dB: two close spaced 500 - 600 ft Beverages staggered 65 feet
12 dB: 800-900 foot Beverage
12 dB: 4-square array of short verticals only 65 feet on a side (1/10 acre)
13-14 dB: 4 short verticals or a steerable 8-circle array of short verticals (1 - 3 acres)
14 dB 2 broadside, staggered 800-900 ft Beverages separated 350 ft (8 acres or more)
14-16 dB: 3 broadside 800-900 ft Beverages and arrays of 8 short verticals (5 - 20 acres)
