Shively Labs FM Antennas and Accessories
Home About Shively FM Antennas FM Filters & Combiners IBOC HDRadio™ Coax Components Other Products & Services Technical Information Solving Customer Needs

Gain of Full-Wave and Half-Wave-Spaced Arrays

Circularly-polarized antennas:

No. of Bays Full-Wave-Spaced
Half-Wave-Spaced
Power Gain dB Gain Power Gain dB Gain

1 0.46 -3.40 -- --
2 0.99 -0.04 0.70 -1.54
3 1.55 1.90 1.01 1.05
4 2.12 3.26 1.31 1.17
5 2.70 4.31 1.62 2.08
6 3.28 5.16 1.92 2.83
7 3.87 5.88 2.22 3.47
8 4.46 6.50 2.53 4.03
10 5.65 7.52 3.14 4.96
12 6.85 8.36 3.75 5.74
14 8.05 9.06 4.36 6.39
16 9.25 9.66 4.96 6.96

Vertically- or horzontally-polarized antennas:

No. of Bays Full-Wave-Spaced
Half-Wave-Spaced
Power Gain dB Gain Power Gain dB Gain

1 0.92 -0.36 -- --
2 1.98 2.97 1.40 1.46
3 3.10 4.91 2.02 4.05
4 4.24 6.27 2.62 4.17
5 5.40 7.32 3.24 5.08
6 6.56 8.16 3.84 5.83
7 7.74 8.89 -- --
8 8.92 9.50 5.06 7.03
10 11.30 10.53 6.28 7.96
12 13.70 11.37 7.50 8.74
14 16.10 12.07 8.70 9.39
16 18.50 12.67 9.92 9.96

NOTE: These gain figures are valid for any Shively FM antenna. Please contact the factory for gain figures for spacing other than full- or half-wave.

Printer-friendly Adobe Acrobat version

Get Acrobat Reader (free download)
Last updated: 10/09/07
Webmaster: Al Friend
© copyright 2007 Howell Laboratories, Inc.