ACTIVE POWERED GARMIN GPS ANTENNAS:

Manufacturer          GARMIN           GARMIN           GARMIN
Antenna               GA 26            GA 27            GA 28
Dimensions (mm)       50x71x15         50x71x17         56x96x59
Mount                 Magnetic /       Magnetic /       1" x 14 tpi
                      Suction cup      Suction cup      marine mount
Connector             BNC              MCX              BNC
Power                 5Vdc @ 30 mA max 5Vdc @ 30 mA max 5Vdc @ 30 mA max
Gain (db)             15               15               15
Cable length (m)      2.5              2.5              10
Cable type            RG-174           RG-174           LL RG-58
Cable loss            4-5 db           4-5 db           4-5 db
Noise (db)            2                2                2
Gain Pattern          +1.5db@90 deg.   +1.5db@90 deg.   +1.5db@90 deg.
                      -1db@45deg       -1db@45deg       -1db@45deg
                      -6db@10deg       -6db@10deg       -6db@10deg
Axial Ratio           3db@90 deg.      3db@90 deg.      3db@90 deg.
Rejection             15db@50MHz       15db@50MHz       15db@50MHz
                      25db@100MHz      25db@100MHz      25db@100MHz
Op. Temp.             -55/+85          -55/+85          -55/+85
Price (US$ retail)    99.98            99.98            129.98
     
     -Garmin Technical Support