VOACAP Type-13 Files for Amateur Band Antennas
To provide some idea of the anticipated azimuth pattern shape for the antennas included in the type-13 collections, the following plots may be useful. Elevation patterns vary for each combination of height, frequency, and other variables and are therefore impractical to present. These azimuth patterns are simply an aid to matching your antenna type to the nearest monoband antenna collection. All beam patterns within a collection have the same shape, with some small variations in the rearward patterns due to differences in height above ground as measured in wavelengths.
Monoband Yagis
Monoband Quads
Moxon Rectangle
2-Element Phased Array (or 2-Element Driver-Director Yagi)
2-Element Bi-Directional W8JK Flat-Top with 1 wavelength elements and 1/2 wavelength spacing
2-Element Bi-Directional W8JK Flat-Top with 1 wavelength elements and 1/4 wavelength spacing
Collinear Array with 2 wavelength total length (4 1/2 wavelength sections with phasing sections)
Bi-Square Array with 4 1/2 wavelength legs
Multi-Band W8JK Array with 1.25-wl elements and 0.625-wl spacing at highest frequency
Multi-Band Lazy-H Array with 1.25-wl elements and 0.625-wl spacing at highest frequency
(images for this section are missing)
Basic Vertical Monopoles and Dipoles (All azimuth patterns are omni-directional.)
Ground-mounted 1/4-wl monopoles
type13-53.gif
type13-54.gif
Ground-mounted 1/2-wl monopoles
type13-55.gif
type13-56.gif
Elevated monopoles with 4 attached radials at 20' (80-10 meters)
type13-59.gif
Vertical dipoles with 0.05-wl base heights (160-10 meters)
type13-57.gif
type13-58.gif
Multi-band vertical doublet 44' center-fed, 5' above ground (30-10 meters)
type13-60.gif
Self-Contained Vertically Polarized Arrays
Note: SCV patterns include sample elevation and azimuth patterns, but use with caution. Gain and elevation values change with the frequency, the base height above ground, and the quality of ground below the antenna.
Half Square
Bobtail Curtain
Equilateral Delta Loop
Right-Angle Delta Loop
Side-Fed Rectangular Loop
5-Element Bruce Array
Phased Vertical-Element Arrays
2 In-Phase Monopoles, Broadside Pattern
3 In-Phase Monopoles, Broadside Pattern
2 Phased In-Line Monopoles
2 In-Phase Dipoles, Broadside Pattern
3 In-Phase Dipoles, Broadside Pattern
2 Phased In-Line Dipoles
Triangle of 3 Monopoles with 2 Parasitic Reflectors
Triangle of 3 Dipoles with 2 Parasitic Reflectors
4-Square Array
Updated 08-4-2007. © L. B. Cebik, W4RNL. Data may be used for personal purposes, but may not be reproduced for publication in print or any other medium without permission of the author.
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