Specifications

26
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The delta loop antennas are ideally suited
to long range communications due to
their low angle. This configuration is
best for communications ranging from
500 to 5000 miles in the HF frequency
range of 4 to 22 MHz. Noise rejection is
excellent, as stated for the quad loop
antenna. Because the antenna system is
not connected to a ground, noise rejection
is enhanced. If mounted on the roof-top
of the building, it is further isolated from
the building which generates RF noise. The supporting mast should be 8 to 14
meters tall to provide good overall HF performance.
Note that with this type of antenna, the coupler may be mounted in the middle
of the horizontal portion of the loop or it may be mounted at the corner. If
mounted at the corner and the lead from the coupler attached to the vertical
leg, the polarization of the loop tends to be vertical and is slightly better for
low angle long distance communications.
Loops in the horizontal plane may also be used. This type of antenna provides
exceptionally good performance on the low frequency bands for short to
intermediate range communications.
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USA
P.O. Box 3526, 98009 Fax: [phone] Tel: [phone] or 1-800-259 7331
E-mail: [e-mail] Web site: http://www.sgcworld.com
© 1998 SGC Inc
SG-235 Manual
Radiation
Base Delta Loop
Coupler
Coupler
up to 300 feet
up to 200 feet
Hot
GND
Base Ladder Installation
Control cable
RF cable
Balanced Line Feeders
300-600 Ohms