The three element dBs 100 VDB antenna is a high gain, elliptically polarized, VHF data broadcast (VDB) antenna. It exhibits an omni-directional azimuth pattern and a shaped vertical pattern, which provides optimal gain and ground multipath attenuation.
The elliptical polarization provides 4 dB more gain in the horizontal plane than the vertical plane.
The three element VDB antenna is less site sensitive than the single element VDB antenna.
The three element VDB antenna provides VHF data uplink service for all appropriately-equipped aircraft within an approximate 20 nmi or greater radius of the LAAS ground station.
It is specifically designed to operate with VDB transmit signals operating from 108 to 118 MHz.
Peak power handling capability for the dBs 100 is ≤ 250 watts CW. The main lobe gain is ≥ 4.0 dBi for the horizontally polarized component and ≥ 0.0 dBi for the vertically polarized component.
One Type N Female Jack is used for the RF connection. RF input is 50 Ω nominal and VSWR is less than 2.0:1.