WB-SuperStinger-900H by Wireless Beehive 900 MHz Horizontally Polarized Super Stinger (12 dBi) Super-Stinger® Passive Gain Antenna for 900 GHz SMs Slip on an extra 13.5 dBi Gain & pattern remain solid with snow, frost & ice Boost signal levels for marginal customers Speed up your installs Narrows the pattern to 39 degrees Lowers jitter Weight: 1.80 lbs Dimensions: 15"L x 15"W x 4.5"D The Fine Print: Yagi Antennas suffer from an effect called dielectric loading when coated with ice. A yagi with a heavy coating of ice will receive its designed frequency from the back as strong or stronger than from the front (pattern reversal.) This is caused by the ice reducing the velocity of the signal near and within the elements of the antenna. The antenna actually resonates at a lower frequency when ice coated (think of a tuning fork working in "very thick" air.) The Super Stinger design prevents dielectric loading of resonant elements, thus making it much more resistant to problems caused by snow & ice.